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The attached worksheets list the highest potency-weighted toxic emissions inthe 1996, 2001, 2004, 2005, and 2006 CEIDARS database years.

Source:tonesumscore2006 CEIDARS January 10, 2008tonesumscore2005 CEIDARS December 18, 2007tonesumscore2004 CEIDARS December 18, 2007tonesumscore2001 CEIDARS December 18, 2007tonesumscore1996 CEIDARS December 18, 2007

DIS FACID FNAME FSIC POLABBR CH2006 EmissiCANCER_ CHRONIC ACUTE_SSJU 625 CALMAT CO. 1446 Asbestos 1,647 177,336SC 14495 VISTA METALS C 3341 2,3,7,8-T 1 94,316 6,250SJU 50234 SHELL WESTERN E1311 Nickel 15,248 6,739 52,218 44SC 4477 SO CAL EDISON C 4911 DieselExh 85,261 43,483 2,920SC 11192 HI-SHEAR CORPO 3452 Cr(VI) 143 36,465 122SJU 40032 CHEVRON - COAL 1311 Nickel 8,236 3,640 28,204 24FR 9999 BEALE AFB FACIL 9711 Nickel Y 7,021 3,103 24,045 20SJU 257 CHEVRON USA INC1311 Nickel 6,194 2,738 21,212 18MOJ 1200003 TXI RIVERSIDE 3241 DieselExh 39,087 19,934 1,339SC 22551 THUMS LONG BEAC1311 Glutaraldh Y 7,950 17,016SJU 50140 M.H. WHITTIER, 1311 Nickel 4,501 1,989 15,413 13GBU 3050309 COSO OPERATING4961 H2S Y 810,800 13,884 331MOJ 900002 SEARLES VALLEY 1474 H2S 757,956 12,979 309SJU 10316 DEL MONTE USA P2033 Cr(VI) 46 11,626 39SC 12129 BEVERLY HOSPIT 8062 Asbestos 107 11,520GBU 5 DESERT AGGREGA2951 Cr(VI) Y 42 10,660 36SD 4824 MCAS MIRAMAR 9711 DieselExh Y 19,038 9,709 652SJU 257 CHEVRON USA INC1311 H2S 536,912 9,194 219SC 25786 SEVEN-UP/ROYAL 2086 Chlorine 10,050 8,604 1SJU 40208 SANTA FE ENERG 1311 Nickel 2,453 1,084 8,402 7SC 131003 BP WEST COAST P2911 Sulfuric Ac 46,794 8,013 7IMP 15 IMPERIAL IRRIGAT4911 Chlorine Y 9,132 7,818 1SJU 299 UNOCAL OIL & GAS1311 Nickel 2,186 966 7,485 6SJU 247 MOBIL EXPLORAT 1311 Nickel 2,140 946 7,328 6SJU 50098 GOLDEN STATE ME5093 Asbestos 68 7,288SC 98155 ROTORCRAFT SUP3728 Cr(VI) 28 7,166 24KER 9 CALIFORNIA POR 3241 Asbestos Y 60 6,465SC 43201 SNOW SUMMIT IN 7999 DieselExh 12,470 6,360 427IMP 49 J.J. ELMORE 4911 H2S 367,088 6,286 150VEN 1266 MANSON CONSTRU1629 DieselExh N 12,185 6,214 417SC 5973 SO CAL GAS CO 4923 Acrolein 2,154 6,147 194NS 10006028 NORTHERN CALIF 4961 Arsenic 1,052 5,900 6,003 95IMP 47 NEW CHARLESTON4911 Chlorine 6,951 5,951 1SC 20604 RALPHS GROCER 5141 DieselExh 11,601 5,917 397FR 2023 TRI-UNION 1311 Chlorine N 6,843 5,859 1MBU 1482 UCSC 8221 DieselExh 11,311 5,769 387MOJ 8400589 US ARMY NATIONA9711 DieselExh 11,060 5,641 379AV 10231816 NORTHROP GRUM3721 Strontium 87 5,542 19SC 4242 SAN DIEGO GAS & 4922 Acrolein 1,928 5,502 174SJU 50234 SHELL WESTERN E1311 Phosphoru 2,112 5,166SAC 160 CONSOLIDATED F 3714 Lead Chro Y 122 4,967 17SC 48323 SIGMA PLATING C 3471 Cr(VI) 18 4,616 15AV 115902005 FRESH AIR ENVI 1742 Asbestos 43 4,607SC 14833 SAINT JOHN'S HO 8062 Glutaraldh 2,084 4,460SJU 247 MOBIL EXPLORAT 1311 H2S 252,547 4,324 103BA 11661 RHODIA INC 2819 Sulfuric Ac 24,840 4,253 4NCU 60 PALCO - SAWMILL 2421 Chlorine Y 4,879 4,177 0SLO 13 CONOCO PHILLIPS2911 Nickel Y 1,203 532 4,120 3SC 800128 SO CAL GAS CO (E4922 Acrolein 1,443 4,118 130ED 7 SIERRA PACIFIC 2421 Manganes Y 4,698 4,022SC 800089 EXXONMOBIL OIL 2911 Sulfuric Ac 21,800 3,733 3SJU 21419 THE WINE GROUP 2084 Cr(VI) 15 3,726 13KER 572 RAND MINING CO 1041 Arsenic 631 3,538 3,600 57

SJU 1130 CHEVRON U S A I 1311 H2S 202,140 3,461 82NS 10006018 NCPA UNIT 2 4911 Arsenic Y 603 3,384 3,443 54SC 4451 TEXTRON FASTEN3452 Sulfuric Ac 20,039 3,431 3MOJ 35601021 CASTLE MOUNTAI 1041 Nickel Y 990 438 3,392 3SHA 51 BURNEY FOREST 2421 Acrolein 1,161 3,313 105NS 10006011 GEYSERS POWER 4911 H2S Y 190,200 3,257 78AV 122802129 LANCASTER LAND9511 DieselExh 6,332 3,229 217SJU 20387 DIAMOND WALNUT5145 Methyl Bro Y 91,400 3,130 0MOJ 35601021 CASTLE MOUNTAI 1041 Arsenic Y 545 3,057 3,111 49SJU 20890 NEWARK SIERRA 2621 Nickel 906 400 3,103 3NS 10006010 GEYSERS POWER 4911 H2S Y 181,000 3,099 74SJU 50118 CALMAT- INDUSTR2951 Asbestos 28 3,049SJU 40026 CERTAINTEED CO 3296 Formaldeh Y 52,888 539 3,019 10IMP 75 IMPERIAL RESOU 4911 HCl 157,334 2,993 1SC 29110 ORANGE COUNTY 4952 Formaldeh 51,863 529 2,960 9SC 100154 COLMAC ENERGY 4911 Cr(VI) 12 2,958 10SC 131003 BP WEST COAST P2911 Asbestos 27 2,939SLO 13 CONOCO PHILLIPS2911 HCl Y 153,242 2,916 1SJU 50178 NAVAL PETROLEU1311 Formaldeh 51,007 520 2,911 9SC 55449 BKK CORPORATION4953 HCl Y 152,336 2,898 1NS 10006025 UNOCAL GEOTHER4961 Phosphoru 1,174 2,872SJU 50029 CALIFORNIA CORR9223 Chlorine 3,324 2,846 0NS 10006028 NORTHERN CALIF 4961 Nickel 830 367 2,843 2SJU 40123 INDUSTRIAL ASPH2951 Asbestos 26 2,816PLA 44 RIO-BRAVO 4911 Ammonia 3,160,000 2,705 17BA 11 SHELL MARTINEZ 2911 Formaldeh 46,760 477 2,669 9GBU 1 AMERICAN PERLI 3295 Manganes Y 3,070 2,628SC 14437 SAN ANTONIO CO 8062 Acrolein 912 2,603 82SC 95433 ORANGE COUNTY 3499 Chlorine 3,040 2,603 0SC 800089 EXXONMOBIL OIL 2911 Nickel 746 330 2,555 2SC 102075 FOAMEX INTERNAT3086 TolueneDii 1,040 19 2,544SC 800363 CONOCOPHILLIPS 2911 Sulfuric Ac 14,827 2,539 2SJU 247 MOBIL EXPLORAT 1311 Phosphoru 1,038 2,538COL 54 ARKOMA PRODUC1381 Chlorine 2,956 2,530 0COL 34 COASTAL OIL & G 1381 Chlorine 2,839 2,431 0SC 800030 CHEVRON PRODUC2911 DieselExh 4,729 2,412 162IMP 53 PLANT EAST MESA4911 Benzene 48,649 2,398 139 1MOJ 1200003 TXI RIVERSIDE 3241 Formaldeh 41,148 420 2,349 7MOJ 8400589 US ARMY NATIONA9711 Cr(VI) 9 2,346 8SD 99 ROHR INC 3728 Cr(VI) Y 9 2,334 8SC 141878 SWIFT-COR AERO 3444 Cr(VI) 9 2,327 8MOJ 100005 CEMEX - BLACK 3241 Phosphoru Y 943 2,308IMP 47 NEW CHARLESTON4911 Phosphoru 926 2,265NCU 60 PALCO - SAWMILL 2421 HCl Y 117,340 2,233 1SC 800030 CHEVRON PRODUC2911 Sulfuric Ac 12,550 2,149 2FR 18 HARTER PIK'DRITE2033 Chlorine 2,500 2,140 0SC 17301 ORANGE COUNTY 4952 Formaldeh 36,502 372 2,083 7SC 800089 EXXONMOBIL OIL 2911 Acrolein 723 2,064 65VEN 1139 VENTURA PORT D 1629 DieselExh Y 4,010 2,045 137BA 16 CONOCOPHILLIPS 2911 Formaldeh N 35,483 362 2,025 6COL 36 P G & E RESOUR 1381 Chlorine 2,330 1,995 0SC 131003 BP WEST COAST P2911 Beryllium 81 331 1,983SD 19 NATL STEEL & SH 3731 DieselExh Y 3,889 1,983 133FR 22 P G & E RESOURC 1311 Chlorine 2,287 1,958 0

NS 10006005 GEYSERS POWER 4911 H2S Y 113,200 1,938 46KER 572 RAND MINING CO 1041 DieselExh 3,783 1,929 130SC 9496 BENDER MACHINE,3599 Cr(VI) Y 7 1,902 6BA 22 CONOCO PHILLIP 2999 HCl 99,765 1,898 1BA 14628 TESORO REFININ 2911 Benzene 38,160 1,881 109 1SC 136913 MORRELL'S ELECT3471 Cr(VI) 7 1,862 6IMP 54 AMERICAN GIRL M1041 Arsenic 325 1,823 1,855 29NCU 37 EVERGREEN PULP,2611 Sodium HydY 51,967 1,854 111TUO 1 SIERRA PACIFIC 2421 Manganes Y 2,147 1,839SJU 50037 CHEVRON BITTER 4612 Nickel 536 237 1,835 2SHA 44 DICALITE MINER 1499 Manganes 2,130 1,824SJU 713 PARAMOUNT KING 723 Phosphine 8,442 1,807SJU 257 CHEVRON USA INC1311 Phosphoru 733 1,794SHA 2 LEHIGH SOUTHWE3241 HCl 93,900 1,787 1NS 10006006 GEYSERS POWER 4911 H2S Y 103,400 1,771 42SJU 50234 SHELL WESTERN E1311 Cr(VI) 7 1,763 6KER 572 RAND MINING CO 1041 HCN 92,124 1,753 5MOJ 1200003 TXI RIVERSIDE 3241 Manganes 2,025 1,733NCU 37 EVERGREEN PULP,2611 Cr(VI) Y 7 1,730 6IMP 15 IMPERIAL IRRIGAT4911 Nickel Y 498 220 1,706 1SC 68996 HONEYWELL TUR 3714 DieselExh 3,250 1,658 111BA 31 DOW CHEMICAL 2879 Chlorine 1,927 1,649 0IMP 45 EARTH ENERGY, I 4911 H2S 96,155 1,646 39SLO 13 CONOCO PHILLIPS2911 Manganes Y 1,917 1,641NS 10006025 UNOCAL GEOTHER4961 H2S 95,652 1,638 39SC 131003 BP WEST COAST P2911 Nickel 477 211 1,634 1NS 10006018 NCPA UNIT 2 4911 Nickel Y 475 210 1,625 1BA 1438 NEW UNITED MOT 3711 EGBE 185,134 1,585 0NCU 96 DG FAIRHAVEN P 4911 Manganes Y 1,828 1,565SC 42630 PRAXAIR INC 2813 Asbestos 15 1,561NCU 60 PALCO - SAWMILL 2421 Formaldeh Y 27,174 277 1,551 5IMP 47 NEW CHARLESTON4911 Cr(VI) 6 1,530 5SC 9163 INLAND EMPIRE U 4959 Acrolein 535 1,526 48SJU 257 CHEVRON USA INC1311 Formaldeh 26,531 271 1,514 5BA 12626 VALERO REFINING2911 Nickel 438 194 1,500 1MOJ 8400589 US ARMY NATIONA9711 Toluene 2,598,693 1,483 1MOJ 11800001 MITSUBISHI CEME 3241 HCl Y 77,780 1,480 1COL 201 OXY USA, INC. 1381 Chlorine 1,717 1,470 0KER 28 U.S. BORAX 1474 DieselExh Y 2,835 1,446 97KER 21 NATIONAL CEMEN 3241 Formaldeh Y 25,320 258 1,445 5AV 52002088 METALCLAD INSU 1795 Asbestos 13 1,443BA 13289 LOS ESTEROS CRI4911 Formaldeh 25,016 255 1,428 5SC 7796 TECHNI-CAST CO 3366 Acrolein 498 1,421 45SC 800030 CHEVRON PRODUC2911 Formaldeh 24,885 254 1,420 5SJU 285 DIAMOND WALNUT 723 Methyl Bro Y 40,640 1,392 0KER 20 LEHIGH SOUTHWE3241 Cr(VI) Y 5 1,363 5SC 800236 LA CO. SANITATIO 4952 Acrolein 470 1,340 42SD 251 PACIFIC GAS TUR 3724 Acrolein 469 1,340 42SJU 566 LIQUID WASTE MA4953 Cr(VI) 5 1,301 4SC 114801 RHODIA INC. 2819 Sulfuric Ac 7,590 1,300 1SJU 40224 SHELL WESTERN E1311 Nickel 365 162 1,251 1SJU 228 DDRW TRACY SIT 9711 Chlorine 1,460 1,250 0COL 33 TRITON OIL & GAS1381 Chlorine 1,459 1,250 0NS 10006007 GEYSERS POWER 4911 H2S Y 72,500 1,241 30

SC 5973 SO CAL GAS CO 4923 Formaldeh 21,669 221 1,237 4MBU 1186 CEMEX - CEMENT 3241 Acrolein 432 1,234 39COL 43 PIRELLI CABLE C 3643 Copper 17,300 1,234 3SC 800370 EQUILON ENTER., 2911 Formaldeh 21,514 219 1,228 4MOJ 1200003 TXI RIVERSIDE 3241 HCl 64,370 1,225 1SAC 1 AEROJET 3761 HCl Y 64,347 1,224 1SC 8582 SO CAL GAS CO/P 4923 Acrolein 426 1,214 38SC 800089 EXXONMOBIL OIL 2911 HCl 63,506 1,208 1SC 800026 ULTRAMAR INC (N 2911 DieselExh 2,305 1,175 79SD 99 ROHR INC 3728 Formaldeh Y 20,483 209 1,169 4IMP 43 ORMAT NEVADA, 4911 Benzene Y 23,680 1,167 68 0SC 800362 CONOCOPHILLIPS 2911 Sulfuric Ac 6,809 1,166 1SJU 40214 SHELL OIL - KET 4612 Nickel 340 150 1,164 1SJU 50229 SHELL OIL WASCO4612 Nickel 340 150 1,164 1SC 800327 GLENDALE CITY, 4931 Nickel 338 149 1,158 1LAK 290 CALPINE - CALI 4911 H2S Y 66,870 1,145 27SD 4824 MCAS MIRAMAR 9711 Acrolein Y 397 1,132 36SJU 50308 TEXACO USA, VE 1311 H2S 66,009 1,130 27SC 800370 EQUILON ENTER., 2911 DieselExh 2,170 1,107 74SJU 50251 TEXACO REFININ 9411 Benzene Y 22,438 1,106 64 0SJU 247 MOBIL EXPLORAT 1311 Formaldeh 19,244 196 1,098 4ED 7 SIERRA PACIFIC 2421 Cr(VI) Y 4 1,097 4BA 41 OWENS CORNING 3296 Formaldeh 19,179 196 1,095 3SD 73 CABRILLO POWER 4911 Nickel Y 318 141 1,089 1SJU 40123 INDUSTRIAL ASPH2951 Chlorine 1,260 1,079 0KER 21 NATIONAL CEMEN 3241 Cr(VI) Y 4 1,075 4SC 4451 TEXTRON FASTEN3452 HCl 56,410 1,073 0KER 28 U.S. BORAX 1474 As cmpd(inY 186 1,046 1,064 17IMP 44 VULCAN GEOTHE 4911 Ammonia 1,228,868 1,052 7SJU 477 PILKINGTON NORT3211 Cr(VI) Y 4 1,052 4SJU 10316 DEL MONTE USA P2033 Nickel 304 134 1,041 1SC 132687 PRODUCTIVITY CA3089 Acrolein 361 1,030 33SJU 40026 CERTAINTEED CO 3296 Cr(VI) Y 4 1,024 3SJU 20755 LIBBEY-OWENS-F 3211 Cr(VI) 4 1,023 3SJU 20921 OWENS-BROCKWA3221 HCl 53,525 1,018 0SHA 44 DICALITE MINER 1499 Cr(VI) 4 1,015 3NS 10006020 NCPA UNIT 4 4911 H2S Y 59,183 1,013 24VEN 41 AERA ENERGY LL 1311 DieselExh Y 1,985 1,013 68SJU 50305 MOBIL 1311 Acrolein 353 1,008 32SJU 50002 ARCO OIL AND G 1311 Nickel 292 129 999 1VEN 8 VINTAGE PETROLE1311 DieselExh Y 1,930 984 66SC 45448 GAS RECOVERY S4911 Nickel 287 127 983 1KER 9 CALIFORNIA POR 3241 Beryllium Y 40 164 983SC 52517 REXAM PLC, REX 3411 EGBE 112,016 959 0LAS 11 CALIF CORRECTI 9223 Nickel Y 279 123 956 1SC 800327 GLENDALE CITY, 4931 Manganes 1,110 950SC 800181 CALIFORNIA PORT3241 Formaldeh 16,615 169 948 3NS 10006004 GEYSERS POWER 4911 H2S Y 53,750 920 22SHA 8 SHEA SAND & GRAV2951 DieselExh 1,800 918 62SJU 1196 SUNMAID GROWER5149 Phosphine 4,273 915SC 1703 EASTERN MUNICIP4952 Acrolein 320 913 29SJU 50177 NAVAL PETROLEU1311 Formaldeh 15,954 163 911 3GBU 3050309 COSO OPERATING4961 Cadmium Y 106 754 905SD 94 USN AIR STATION 9711 DieselExh Y 1,775 905 61

SJU 40125 INDUSTRIAL ASPH2951 Manganes 1,049 898IMP 72 SALTON SEA POWE4911 Ammonia 1,036,669 888 6SC 800089 EXXONMOBIL OIL 2911 Ammonia 1,030,409 882 6SJU 40032 CHEVRON - COAL 1311 Cr(VI) 3 874 3MOJ 1500535 PG&E HINKLEY C 4922 Formaldeh Y 15,251 156 870 3NSI 15 COLLINS PINE CO 2421 Manganes Y 1,013 867NCU 37 EVERGREEN PULP,2611 Acrolein Y 303 864 27SC 800128 SO CAL GAS CO (E4922 Formaldeh 15,063 154 860 3KER 9 CALIFORNIA POR 3241 Manganes Y 996 853NS 10006014 GEYSERS POWER 4911 Benzene Y 17,200 848 49 0SJU 299 UNOCAL OIL & GAS1311 Phosphoru 342 836NS 10006018 NCPA UNIT 2 4911 Asbestos Y 8 832SJU 50306 MOBIL 1311 Acrolein 288 822 26NS 10006015 GEYSERS POWER 4911 H2S Y 47,839 819 20GBU 1 AMERICAN PERLI 3295 Nickel Y 239 105 817 1SJU 224 PHYSICS INTERN 8711 Cr(VI) 3 816 3SJU 257 CHEVRON USA INC1311 Benzene 16,453 811 47 0SHA 39 SIERRA PACIFIC I 2421 Manganes 936 801TUO 1 SIERRA PACIFIC 2421 Arsenic Y 140 785 799 13MOJ 8400589 US ARMY NATIONA9711 Manganes 933 799SC 800003 HONEYWELL INTE 3728 Cr(VI) 3 796 3SJU 232 NAVAL COMMUNIC9711 Nickel 232 103 795 1MOJ 1200003 TXI RIVERSIDE 3241 Cr(VI) 3 794 3KER 28 U.S. BORAX 1474 Manganes Y 926 793SC 4773 SPARTECH PLAST 3081 Acrolein 276 788 25SC 4242 SAN DIEGO GAS & 4922 Formaldeh 13,760 140 785 3SC 45448 GAS RECOVERY S4911 Manganes 917 785SC 800363 CONOCOPHILLIPS 2911 Ammonia 902,333 773 5SD 94 USN AIR STATION 9711 Acrolein Y 271 772 24NS 10006012 GEYSERS POWER 4911 H2S Y 44,800 767 18SC 800193 LA CITY, DWP VA 4911 Formaldeh 13,307 136 760 2AV 118202395 MOUNTAIN HIGH S7999 DieselExh 1,491 760 51SHA 71 MOUNTAIN GATE 1422 DieselExh 1,478 754 51SJU 50054 CITY OF TULARE 9511 H2S 43,990 753 18SD 2631 KYOCERA AMERIC3469 Formaldeh 13,155 134 751 2MOJ 5400246 AEROCHEM INC 3728 Perc Y 74,598 748 365 0SC 70860 CONNOLLY-PACIF 1629 DieselExh 1,462 746 50NS 10006016 GEYSERS POWER 4911 H2S Y 43,400 743 18SC 114847 FOAMEX L.P. 3086 T-2,4-diiso 296 6 724SC 3671 EISENHOWER MED8062 Formaldeh 12,623 129 720 2SJU 40139 J.R. SIMPLOT CO 2819 Ammonia 838,549 718 4BA 14628 TESORO REFININ 2911 Sulfuric Ac 4,175 715 1SC 800189 DISNEYLAND RES 7996 DieselExh 1,401 715 48IMP 43 ORMAT NEVADA, 4911 H2S Y 41,670 714 17SC 800030 CHEVRON PRODUC2911 Nickel 206 91 706 1SC 66849 PERVAN TOOLING 3444 Cr(VI) 3 704 2SJU 50308 TEXACO USA, VE 1311 Formaldeh 12,288 125 701 2TUO 12 PACIFIC-ULTRAP 4911 Manganes Y 815 698BA 2371 USS-POSCO INDU 3312 Sulfuric Ac 4,024 689 1IMP 45 EARTH ENERGY, I 4911 Arsenic 120 674 686 11SJU 247 MOBIL EXPLORAT 1311 1,3-Butadi 2,320 671 20SJU 247 MOBIL EXPLORAT 1311 Benzene 13,571 669 39 0SC 99119 INTERPLASTIC C 2821 Maleic Anh 2,729 668ED 27 SOUTH TAHOE PUB.4952 Chlorine Y 778 666 0

BA 11 SHELL MARTINEZ 2911 Cr(VI) 3 666 2SC 800089 EXXONMOBIL OIL 2911 Chlorine 773 662 0MOJ 8600591 MAGTFTC MCAGCC9711 Cr(VI) 3 658 2SJU 40165 PPG INDUSTRIES 3211 HCl Y 34,507 657 0VEN 137 WESTERN FARM S7389 Phosphoru 268 656SJU 40161 PG&E KETTLEMAN4931 Formaldeh Y 11,440 117 653 2BA 778 SAN JOSE/SANTA 4952 Ammonia 752,053 644 4SC 800181 CALIFORNIA PORT3241 DieselExh 1,260 643 43NS 10006020 NCPA UNIT 4 4911 Ammonia Y 749,090 641 4SC 800089 EXXONMOBIL OIL 2911 Cadmium 74 531 637BA 17 HANSON PERMAN 3241 Benzene 12,867 634 37 0SC 4451 TEXTRON FASTEN3452 Sodium Hyd 17,700 631 38SJU 257 CHEVRON USA INC1311 Cr(VI) 2 629 2MOJ 100005 CEMEX - BLACK 3241 Cadmium Y 73 522 626SD 97576 LEGOLAND CALIFO7996 Cr(VI) 2 625 2BA 14628 TESORO REFININ 2911 Formaldeh 10,871 111 620 2IMP 49 J.J. ELMORE 4911 DieselExh 1,209 617 41SC 800026 ULTRAMAR INC (N 2911 Cr(VI) 2 617 2SC 29110 ORANGE COUNTY 4952 Acrolein 215 613 19VEN 41 AERA ENERGY LL 1311 Acrolein Y 215 613 19SJU 15 WESTERN COTTON2074 Nickel 179 79 612 1MOJ 900002 SEARLES VALLEY 1474 Sulfuric Ac 3,557 609 1MOJ 35601021 CASTLE MOUNTAI 1041 Beryllium Y 25 101 608IMP 51 J.M. LEATHERS 4911 Ammonia 706,075 605 4COL 49 PG&E DELEVAN C 4923 Formaldeh Y 10,547 108 602 2GBU 2013 TWIN MOUNTAIN 1411 Cr(VI) Y 2 599 2SD 4845 USN NAV STA 1 S 9711 Cr(VI) Y 2 598 2SJU 41 ANDERSON CLAYT2074 Nickel 174 77 596 0SD 19 NATL STEEL & SH 3731 Cr(VI) Y 2 588 2MOJ 1200003 TXI RIVERSIDE 3241 Arsenic 103 576 586 9IMP 65 PLANT EAST MESA4911 Phosphoru Y 239 584SJU 50228 SHELL OIL MID P 4612 Nickel 170 75 582 0BA 591 EAST BAY MUNICIP4952 Acrolein 203 581 18SC 3950 CROWN CORK & S 3411 DieselExh Y 1,140 581 39SD 221 USMC BASE MARI 9711 DieselExh Y 1,136 579 39SC 800089 EXXONMOBIL OIL 2911 DieselExh 1,134 578 39IMP 47 NEW CHARLESTON4911 Ammonia 674,286 577 4SJU 50037 CHEVRON BITTER 4612 Cr(VI) 2 574 2SC 800370 EQUILON ENTER., 2911 Cr(VI) 2 574 2IMP 53 PLANT EAST MESA4911 H2S 32,866 563 13MOJ 5400246 AEROCHEM INC 3728 HCl Y 29,586 563 0AV 9701754 LOCKHEED MARTI 3721 DieselExh 1,104 563 38PLA 35 NEC ELECTRONIC 3674 Chlorine 654 560 0SC 131732 NEWPORT FAB, L 3764 Chlorine 646 553 0SJU 20890 NEWARK SIERRA 2621 Cr(VI) 2 551 2LAK 230 CALPINE UNIT 13 4911 Ammonia Y 642,000 550 3SC 16575 TRIGEN-LA ENER 4961 Acrolein 192 547 17SC 13433 SO ORANGE CO W4952 Acrolein 191 545 17SC 14495 VISTA METALS C 3341 Nickel 159 70 544 0PLA 44 RIO-BRAVO 4911 HCl 28,600 544 0SJU 50234 SHELL WESTERN E1311 Arsenic 94 529 538 8MOJ 18500760 SIERRA AGGREG 1499 DieselExh Y 1,056 538 36KER 21 NATIONAL CEMEN 3241 Acrolein Y 188 536 17SC 14437 SAN ANTONIO CO 8062 Formaldeh 9,393 96 536 2

SC 800327 GLENDALE CITY, 4931 Cr(VI) 2 533 2MOJ 1500039 PG&E TOPOCK CO4922 Formaldeh Y 9,328 95 532 2SD 4845 USN NAV STA 1 S 9711 DieselExh Y 1,027 524 35SC 800030 CHEVRON PRODUC2911 Phosphoru 214 523SJU 40032 CHEVRON - COAL 1311 Phosphoru 213 522SC 800335 LA CITY, DEPT OF 4581 DieselExh 1,023 522 35SC 52517 REXAM PLC, REX 3411 Formaldeh 9,055 92 517 2SC 800181 CALIFORNIA PORT3241 Cadmium 60 426 510COL 128 THE TERMO CO 1381 Chlorine Y 595 509 0SC 45953 HAYES LEMMERZ I3714 Sulfuric Ac 2,970 509 0SC 131003 BP WEST COAST P2911 Cadmium 59 422 506MOJ 45601126 ENNIS PAINT 2821 Lead Chro 12 506 2SC 103703 HIGHTOWER PLAT3471 Cr(VI) 2 503 2MBU 926 MONTEREY REGI 4953 Formaldeh 8,775 90 501 2SC 800089 EXXONMOBIL OIL 2911 Manganes 585 501SJU 40128 J.G. BOSWELL OIL 723 Cr(VI) 2 500 2SD 89296 SD METRO PUMPIN4952 Formaldeh Y 8,674 88 495 2BA 51 UNITED AIRLINES 4581 Formaldeh 8,617 88 492 2LAS 16 MT. LASSEN POW 4931 Manganes Y 575 492AV 10231816 NORTHROP GRUM3721 DieselExh 956 487 33SC 800149 US BORAX INC 3299 Cadmium 56 401 481BA 11693 FOAMEX, L P 3086 TolueneDii 196 4 481SJU 50234 SHELL WESTERN E1311 Mercury 252 479 2NSI 52 SIERRA AGGREGA1442 Nickel 140 62 478 0SJU 50058 CONTINENTAL GR 723 Cr(VI) 2 478 2BA 16199 GAYLORD CONTAI6798 Formaldeh 8,353 85 477 2IMP 54 AMERICAN GIRL M1041 HCN 25,053 477 1SD 88196 SAN DIEGO CITY 4953 Manganes 553 473SHA 59 FAWNDALE ROCK &2951 Asbestos 4 473SC 29110 ORANGE COUNTY 4952 DieselExh 926 472 32SC 800182 RIVERSIDE CEMEN3241 Cr(VI) 2 472 2SHA 255 KNAUF FIBER GL 3296 Sulfuric Ac 2,740 469 0PLA 75 SIERRA PACIFIC 4911 DieselExh 917 467 31MBU 1482 UCSC 8221 Formaldeh 8,158 83 466 1COL 50 MCGILL AND SHE 1381 Chlorine 540 462 0NS 10006018 NCPA UNIT 2 4911 H2S Y 26,947 461 11SC 800363 CONOCOPHILLIPS 2911 DieselExh 905 461 31BA 227 CRITERION CATA 2819 Nickel 134 59 460 0SJU 50035 CHAPARRAL PETR1311 Toluene 806,120 460 0PLA 28 SIERRAPINE LTD 2493 Cr(VI) 2 456 2SC 45448 GAS RECOVERY S4911 Cr(VI) 2 454 2BA 16 CONOCOPHILLIPS 2911 Cr(VI) N 2 454 2BA 10 CHEVRON PRODU 2911 B[a]P 243 454SC 18452 UNIVERSITY OF C 8221 Formaldeh 7,939 81 453 1SHA 2 LEHIGH SOUTHWE3241 DieselExh 885 451 30SAC 1 AEROJET 3761 4,4'-MeDianY 577 451 5LAK 240 CALPINE UNIT 16 4911 Ammonia Y 526,120 450 3NS 10006020 NCPA UNIT 4 4911 Mercury Y 236 448 2SJU 50029 CALIFORNIA CORR9223 Lead Chro 11 448 2SD 7050 MANSON CONSTRU1629 DieselExh 871 444 30IMP 49 J.J. ELMORE 4911 Arsenic 77 432 440 7SC 800236 LA CO. SANITATIO 4952 Formaldeh 7,651 78 437 1MOJ 100005 CEMEX - BLACK 3241 Benzene Y 8,861 437 25 0BA 62 AMERICAN BRASS3321 Manganes 510 437

SJU 50002 ARCO OIL AND G 1311 Arsenic 76 427 435 7TUO 1 SIERRA PACIFIC 2421 Formaldeh Y 7,629 78 435 1SJU 20890 NEWARK SIERRA 2621 Phosphoru 176 432BA 621 CITY OF SANTA CL4941 Formaldeh 7,487 76 427 1MOJ 8600591 MAGTFTC MCAGCC9711 DieselExh 838 427 29SD 1969 SOUTHERN CALIF 4911 DieselExh Y 835 426 29SAC 196 KIEFER LANDFILL 4953 Formaldeh 7,429 76 424 1SC 16639 SHULTZ STEEL C 3462 DieselExh 831 424 28BA 23 GENERAL CHEMIC2819 Sulfuric Ac 2,452 420 0SJU 261 CERTAINTEED CO 3296 Ammonia Y 489,361 419 3SC 68122 TIDELANDS OIL 1311 Formaldeh 7,340 75 419 1VEN 997 NAVAL BASE VEN 9711 DieselExh Y 819 418 28SHA 51 BURNEY FOREST 2421 Formaldeh 7,310 75 417 1NS 10006024 AIDLIN GEOTHER 4911 Mercury Y 218 415 2SHA 59 FAWNDALE ROCK &2951 DieselExh 809 413 28SC 13618 BARRY AVE PLATI 3471 Cr(VI) 2 411 1SD 478 SOUTHWEST MARI3731 Cr(VI) 2 410 1IMP 50 A. W. HOCH 4911 Ammonia 477,456 409 3SJU 50308 TEXACO USA, VE 1311 Acrolein 143 408 13SC 126501 VOUGHT AIRCRAF 3721 Cr(VI) 2 408 1SJU 257 CHEVRON USA INC1311 Acrolein 142 406 13SHA 164 PACIFIC GAS & E 4922 Acrolein 141 403 13SC 800074 LA CITY, DWP HA 4911 Formaldeh 7,060 72 403 1SJU 50177 NAVAL PETROLEU1311 Benzene 8,165 403 23 0SC 8936 FLEETWOOD MOTO3799 MeDiphenD 1,648 403SAC 67 BLUE DIAMOND 2099 Phosphine 1,878 402SJU 11053 TRI-VALLEY GROW2033 Nickel 117 52 401 0MBU 926 MONTEREY REGI 4953 Acrolein 139 395 12SAC 194 SACRAMENTO PO 4931 Formaldeh 6,812 69 389 1SJU 40164 PIRELLI ARMSTRO3011 Acrolein 136 388 12SC 14966 U S GOV'T, V A M 9451 DieselExh 761 388 26AV 113301969 AMERICAN TOWER3669 Acrolein 135 385 12SC 115315 RELIANT ENERGY 4911 Sulfuric Ac 2,250 385 0SD 7006 ISP ALGINATES IN 2833 Chlorine 450 385 0SC 77388 WESTERN MUNICI 4941 Acrolein 133 381 12SJU 2520 PARAMOUNT FARM723 Phosphine 1,780 381MOJ 8600591 MAGTFTC MCAGCC9711 Chlorine 442 378 0MOJ 100006 CEMEX - RIVER P 3241 Cr(VI) Y 1 377 1SC 23589 INTERNATIONAL 3354 Sulfuric Ac 2,190 375 0SC 3704 ALL AMERICAN AS2951 Nickel 109 48 374 0MBU 1058 PACIFIC RECOVE 4931 Formaldeh 6,537 67 373 1SC 23194 CITY OF HOPE ME 8062 DieselExh 727 371 25SJU 1022 ADVANCED FOOD 2023 Sodium Hyd 10,320 368 22AV 1401927 CALMAT CO. DBA 1442 DieselExh 710 362 24SD 478 SOUTHWEST MARI3731 Copper 5,066 361 1SHA 51 BURNEY FOREST 2421 Benzene 7,330 361 21 0SC 4344 KUSTOM FIT MFG CO 2531 T-2,4-diiso 147 3 359SC 8547 QUEMETCO INC 3341 Arsenic 63 352 358 6SJU 20528 GENERAL MILLS, I 2043 Phosphoru 146 358SJU 50234 SHELL WESTERN E1311 Beryllium 15 59 356SC 13616 SPRAYLINE ENTER3479 Cr(VI) 1 356 1SC 114847 FOAMEX L.P. 3086 T-2,6-diiso 145 3 355SJU 50178 NAVAL PETROLEU1311 Benzene 7,169 353 20 0SC 800363 CONOCOPHILLIPS 2911 Manganes 413 353

BA 703 PACIFIC STEEL C 3325 Manganes 412 352NSI 1 SIERRA PACIFIC 2421 Manganes Y 410 351COL 55 WADHAM ENERGY 4931 Formaldeh Y 6,136 63 350 1SJU 20921 OWENS-BROCKWA3221 Cadmium 41 292 350SC 35302 OWENS CORNING 2952 Cr(VI) 1 349 1KER 21 NATIONAL CEMEN 3241 DieselExh Y 681 347 23SC 800240 TIN, INC. TEMPLE 2631 Formaldeh 6,069 62 346 1BA 17 HANSON PERMAN 3241 Mercury 179 341 2SJU 50147 MCFARLAND ENERG1311 Acrolein 119 340 11SD 88196 SAN DIEGO CITY 4953 Vinyl Chlor 2,566 340 17 0SJU 40149 M.H. WHITTIER C 1311 H2S 19,794 339 8IMP 46 SANTA FE PACIFI 1041 HCN Y 17,705 337 1SC 131732 NEWPORT FAB, L 3764 Sulfuric Ac 1,970 337 0MBU 23 AERA ENERGY LL 1311 H2S 19,530 334 8SC 800089 EXXONMOBIL OIL 2911 Benzene 6,767 334 19 0MBU 1186 CEMEX - CEMENT 3241 Mercury 175 333 2VEN 33 LA CONCHITA OIL 1311 Formaldeh Y 5,814 59 332 1SD 118 CP KELCO 2099 DieselExh Y 649 331 22BA 11866 LOS MEDANOS EN4911 Formaldeh 5,784 59 330 1SC 131003 BP WEST COAST P2911 Formaldeh 5,776 59 330 1MBU 1369 STEVENS CREEK 1611 DieselExh 648 330 22SD 4824 MCAS MIRAMAR 9711 Cr(VI) Y 1 330 1NSI 3 SIERRA PACIFIC 2421 Nickel Y 96 42 328 0PLA 44 RIO-BRAVO 4911 Benzene 6,643 328 19 0SJU 50140 M.H. WHITTIER, 1311 Beryllium 13 55 328SJU 50305 MOBIL 1311 Benzene 6,626 327 19 0SC 130211 PAPER-PAK INDUS2621 Acrolein 114 326 10BA 541 PACIFIC GAS & E 4922 Formaldeh 5,705 58 326 1BUT 43 PACIFIC COAST 2033 ChlorineDi 1,136 324SJU 713 PARAMOUNT KING 723 Methyl Bro 9,440 323 0MOD 2501 TIONESTA COMPR4932 Formaldeh Y 5,640 58 322 1SC 16389 CEDARS-SINAI ME 8062 DieselExh 629 321 22MBU 1186 CEMEX - CEMENT 3241 Formaldeh 5,607 57 320 1SC 800370 EQUILON ENTER., 2911 Nickel 94 41 320 0SJU 477 PILKINGTON NORT3211 Ammonia Y 372,634 319 2SC 9163 INLAND EMPIRE U 4959 Formaldeh 5,597 57 319 1BA 16 CONOCOPHILLIPS 2911 1,3-Butadi N 1,100 318 9COL 22 MOBIL EXPLORAT 1381 Chlorine 370 317 0SJU 50308 TEXACO USA, VE 1311 Benzene 6,436 317 18 0SC 7417 EASTERN MUNICIP4952 Acrolein 110 314 10SC 118124 CEDAR FAIR LP, 7996 Acrolein 110 314 10SJU 40042 CITY OF FRESNO, 4952 Ammonia 363,047 311 2BA 22 CONOCO PHILLIP 2999 Mercury 163 311 2SJU 423 R-CLEANERS 7216 Perc 30,861 310 151 0TUO 15 SIERRA PACIFIC I 2421 Manganes Y 363 310IMP 53 PLANT EAST MESA4911 Ammonia 359,249 308 2MOJ 19901418 HELENDALE WAS 4952 Chlorine 360 308 0SJU 50182 OXY USA INC. 1311 Nickel 90 40 307 0SJU 534 DOLE DRIED FRUIT2068 Methyl Bro 8,925 306 0SLO 36 CONOCO PHILLIPS4612 Acrolein Y 106 304 10SC 18188 PLASMA TECHNO 3479 Nickel 89 39 304 0BA 10 CHEVRON PRODU 2911 Benzene 6,151 303 18 0SC 14833 SAINT JOHN'S HO 8062 Sodium Hyd 8,427 301 18SJU 50002 ARCO OIL AND G 1311 Formaldeh 5,276 54 301 1

SC 800030 CHEVRON PRODUC2911 Cadmium 35 251 301SJU 15 WESTERN COTTON2074 Cr(VI) 1 300 1SC 131003 BP WEST COAST P2911 Ammonia 349,794 299 2BA 194 PCC STRUCTURAL3324 Nickel 87 39 299 0SC 38971 RICOH ELECTRONI3579 Perc Y 29,820 299 146 0SC 800370 EQUILON ENTER., 2911 Manganes 350 299SJU 50140 M.H. WHITTIER, 1311 H2S 17,392 298 7MOJ 11800001 MITSUBISHI CEME 3241 Mercury Y 156 297 1SJU 3076 SNOW CLEANERS 7216 Perc 29,592 297 145 0IMP 72 SALTON SEA POWE4911 Benzene 6,015 297 17 0SAC 194 SACRAMENTO PO 4931 Sulfuric Ac 1,726 296 0SC 131003 BP WEST COAST P2911 Mercury 155 295 1BA 148 BALL METAL BEV 3411 EGBE 34,513 295 0SC 19194 EPPINK OF CALIF 2491 Formaldeh 5,144 52 294 1KER 572 RAND MINING CO 1041 Manganes 344 294SJU 299 UNOCAL OIL & GAS1311 Cr(VI) 1 293 1NS 10006026 SANTA ROSA GEOT4961 H2S 17,025 292 7SJU 41 ANDERSON CLAYT2074 Cr(VI) 1 292 1MBU 1347 SOLEDAD ENERGY4911 HCl 15,242 290 0SJU 50308 TEXACO USA, VE 1311 Naphthale 5,016 290 95SJU 40224 SHELL WESTERN E1311 Acrolein 101 289 9SC 71645 TECHNICAL METAL3471 Cr(VI) 1 289 1IMP 52 ORMESA 1H 4911 Ammonia 333,990 286 2SJU 50124 KAWEAH RIVER R 1442 Cr(VI) 1 286 1SC 19133 HENRY MAYO NEW8062 Acrolein 99 284 9SAC 195 SACRAMENTO CO 4931 Formaldeh 4,973 51 284 1NS 10006021 SONOMA POWER 4911 H2S Y 16,500 283 7SJU 40208 SANTA FE ENERG 1311 Phosphoru 115 283SLO 44 E&B NATURAL RE 1311 Acrolein Y 98 281 9SC 800089 EXXONMOBIL OIL 2911 Mercury 148 281 1SD 73 CABRILLO POWER 4911 Cr(VI) Y 1 281 1SC 3585 R. R. DONNELLEY 2752 Formaldeh 4,902 50 280 1SC 800089 EXXONMOBIL OIL 2911 Beryllium 11 47 280SJU 40128 J.G. BOSWELL OIL 723 Nickel 81 36 279 0IMP 54 AMERICAN GIRL M1041 1,3-Butadi 966 279 8SC 45938 E.M.E. INC/ELEC 3471 Cr(VI) 1 278 1MOJ 100005 CEMEX - BLACK 3241 Cr(VI) Y 1 277 1FR 16004 SUNSWEET GROWE723 Methyl Bro Y 8,070 276 0NSI 3 SIERRA PACIFIC 2421 Benzene Y 5,573 275 16 0SC 16264 INTERNATIONAL C3087 Cr(VI) 1 275 1MOJ 1200003 TXI RIVERSIDE 3241 Acrolein 96 274 9SC 46268 CALIFORNIA STEE 3317 HCl 14,330 273 0SJU 40042 CITY OF FRESNO, 4952 H2S 15,800 271 6TUO 1 SIERRA PACIFIC 2421 Nickel Y 79 35 271 0SC 24235 MILITARY DEPT C 9711 Cr(VI) 1 270 1BA 2478 UCSF/PARNASSU 8062 Formaldeh 4,712 48 269 1NS 10006026 SANTA ROSA GEOT4961 Phosphoru 110 269SC 131003 BP WEST COAST P2911 H2S 15,653 268 6VEN 36 PACIFIC CUSTOM 3259 Phosphoru Y 110 268SC 8547 QUEMETCO INC 3341 1,3-Butadi 929 268 8BA 10 CHEVRON PRODU 2911 Ammonia 312,057 267 2SJU 50046 CHEVRON USA LOS1321 Formaldeh 4,680 48 267 1BA 41 OWENS CORNING 3296 Ammonia 309,602 265 2IMP 54 AMERICAN GIRL M1041 Cadmium 31 221 265

SC 47901 PARKER HANNIFIN3728 Cr(VI) 1 265 1SC 18931 TAMCO 3325 DieselExh 515 263 18BA 3011 IPT SRI COGENER 4931 Formaldeh 4,590 47 262 1FR 19002 CUSTOM CHROME3471 Sulfuric Ac 1,530 262 0SJU 40208 SANTA FE ENERG 1311 Cr(VI) 1 262 1KER 20 LEHIGH SOUTHWE3241 Benzene Y 5,291 261 15 0SAC 196 KIEFER LANDFILL 4953 Acrylonitril 529 261 18AV 122802470 ANTELOPE VALLEY9511 DieselExh 511 261 18SC 800189 DISNEYLAND RES 7996 Acrolein 91 260 8SD 96387 MINNESOTA METHA4931 HCl 13,562 258 0MBU 1189 RMC LONESTAR - 1442 DieselExh 505 258 17SC 800089 EXXONMOBIL OIL 2911 Formaldeh 4,502 46 257 1SHA 59 FAWNDALE ROCK &2951 Arsenic 45 252 256 4SJU 239 TRACY PUMP STA 4612 Nickel 75 33 256 0IMP 44 VULCAN GEOTHE 4911 Benzene 5,200 256 15 0NSI 3 SIERRA PACIFIC 2421 Chlorine Y 298 255 0SC 70220 CROWN CHROME P3471 Cr(VI) 1 255 1SD 73 CABRILLO POWER 4911 Formaldeh Y 4,442 45 254 1NSI 3 SIERRA PACIFIC 2421 Formaldeh Y 4,442 45 254 1MBU 877 MCCORMICK SELPH2892 Cr(VI) 1 253 1SC 4477 SO CAL EDISON C 4911 Formaldeh 4,420 45 252 1BA 591 EAST BAY MUNICIP4952 Formaldeh 4,412 45 252 1BA 646 SILICONIX, INCO 3674 Sulfuric Ac 1,471 252 0SJU 15 WESTERN COTTON2074 Cadmium 29 210 252SC 4477 SO CAL EDISON C 4911 Acrolein 87 248 8SC 121454 BREITBURN ENERG1311 Acrolein 86 247 8BA 12626 VALERO REFINING2911 Manganes 289 247SC 117785 BALL METAL BEV 3411 EGBE 28,787 246 0FR 9999 BEALE AFB FACIL 9711 Manganes Y 288 246SJU 41 ANDERSON CLAYT2074 Cadmium 29 205 245VEN 36 PACIFIC CUSTOM 3259 Acrolein Y 85 244 8SC 8547 QUEMETCO INC 3341 Formaldeh 4,282 44 244 1SJU 40139 J.R. SIMPLOT CO 2819 Chlorine 285 244 0SJU 247 MOBIL EXPLORAT 1311 HCl 12,772 243 0MOJ 35601021 CASTLE MOUNTAI 1041 Cadmium Y 28 203 243AV 118202037 MOUNTAIN HIGH S7999 DieselExh 476 243 16MOJ 8800567 NAVAL AIR WEAP 9711 HCl 12,714 242 0MBU 1186 CEMEX - CEMENT 3241 Phosphoru 99 242SD 8719 SYCAMORE LANDFI4953 Manganes 282 242SJU 50046 CHEVRON USA LOS1321 Acrolein 84 240 8SC 101656 AIR PRODUCTS AN2813 Ammonia 280,801 240 2BA 12115 SPECTRUM LABEL2759 Acrylic aci 1,403 240 0MOJ 999900001 LEAD MASTERS 3341 Manganes 280 240SC 21104 HUNTINGTON BEA 9511 Acrolein 84 239 8NS 10006006 GEYSERS POWER 4911 Mercury Y 125 238 1NS 10006007 GEYSERS POWER 4911 Mercury Y 125 238 1KER 20 LEHIGH SOUTHWE3241 HCl Y 12,440 237 0SJU 50308 TEXACO USA, VE 1311 Acetaldehy 12,451 57 237SJU 1330 GREIF BROS. CO 3411 EGBE Y 27,513 236 0SHA 51 BURNEY FOREST 2421 Manganes 276 236IMP 67 PLANT EAST MESA4911 Phosphoru 96 236MOJ 8600591 MAGTFTC MCAGCC9711 Antimony 275 235BA 778 SAN JOSE/SANTA 4952 Formaldeh 4,099 42 234 1SAC 112 GRAFIL INC 2221 Acrylonitril Y 472 233 16

SC 8724 CAL BUMPER CO 3471 Sodium Hyd 6,494 232 14SJU 861 NATIONAL RAISI 723 Methyl Bro 6,747 231 0NSI 1 SIERRA PACIFIC 2421 Cadmium Y 27 193 231SC 25070 LA COUNTY SANIT4953 DieselExh 453 231 16SJU 50040 CHEVRON RIO BR 4612 Cr(VI) 1 231 1MBU 1347 SOLEDAD ENERGY4911 Formaldeh 4,030 41 230 1BA 16 CONOCOPHILLIPS 2911 Benzene N 4,670 230 13 0MOJ 35601021 CASTLE MOUNTAI 1041 Formaldeh Y 4,011 41 229 1SJU 50049 CHEVRON WARRE1321 Acrolein 80 228 7NS 10006014 GEYSERS POWER 4911 Ammonia Y 266,000 228 1NSI 1 SIERRA PACIFIC 2421 Chlorine Y 266 228 0BA 12626 VALERO REFINING2911 H2S 13,255 227 5SC 800196 AMERICAN AIRLINE4581 DieselExh 445 227 15SC 800113 ROHR,INC 3728 Cr(VI) 1 227 1BUT 1005 OROVILLE HOSPIT8062 HCl 11,900 226 0NSI 52 SIERRA AGGREGA1442 DieselExh 444 226 15SC 124016 OAKLITE PRODUCT2842 Cr(VI) Y 1 226 1SC 14495 VISTA METALS C 3341 Copper 3,160 225 1SJU 62 TTTI PANOCHE P 4612 Cr(VI) 1 225 1SJU 43 TTTI GUSTINE PU 4612 Cr(VI) 1 225 1LAS 15 H.L. POWER COM 4931 Ammonia Y 261,906 224 1NCU 59 P G & E - HUMBO 4911 Nickel Y 65 29 224 0SJU 50282 VICTORY OIL CO 1311 H2S 13,052 223 5NCU 37 EVERGREEN PULP,2611 Formaldeh Y 3,912 40 223 1TEH 8 SIERRA PACIFIC 2499 Sulfuric Ac 1,300 223 0LAK 290 CALPINE - CALI 4911 Benzene Y 4,518 223 13 0SC 131003 BP WEST COAST P2911 Manganes 260 223SAC 106 REGIONAL SANITA4952 Ammonia 259,762 222 1LAS 16 MT. LASSEN POW 4931 Nickel Y 65 29 222 0SJU 40028 CHAMPION PARTS3714 Cadmium 26 185 222SC 800127 SO CAL GAS CO (E4923 Acrolein 77 221 7BA 12626 VALERO REFINING2911 Ammonia 256,884 220 1SC 800026 ULTRAMAR INC (N 2911 Phosphoru 90 220SC 346 FRITO-LAY NORTH2096 Acrolein 76 218 7SJU 4163 DEL REY PACKIN 723 Methyl Bro 6,375 218 0MOJ 900002 SEARLES VALLEY 1474 Cadmium 26 182 218SC 56547 MARCEL ELECTRO3672 Formaldeh 3,810 39 217 1IMP 50 A. W. HOCH 4911 Benzene 4,402 217 13 0SJU 247 MOBIL EXPLORAT 1311 Cr(VI) 1 217 1SJU 8 AD-ART INC 3993 Lead Chro 5 216 1SJU 4138 NATIONAL RAISI 723 Dichlorovo 1,528 216BA 935 LEVIN RICHMOND 4491 Manganes 251 215SJU 10554 JS WEST MILLIN 2048 Cr(VI) 1 215 1SC 50418 ORANGE COUNTY, 4953 Formaldeh 3,738 38 213 1SC 14495 VISTA METALS C 3341 Manganes 249 213VEN 41 AERA ENERGY LL 1311 Formaldeh Y 3,714 38 212 1SC 800074 LA CITY, DWP HA 4911 Ammonia 247,812 212 1SC 22379 CHROMALLOY LOS7699 Nickel 62 27 212 0SJU 493 THREE BRAND CA 211 Cr(VI) 1 212 1SHA 59 FAWNDALE ROCK &2951 Nickel 62 27 211 0MOJ 8800567 NAVAL AIR WEAP 9711 Cadmium 25 176 211NSI 1 SIERRA PACIFIC 2421 Nickel Y 61 27 209 0SJU 50069 DEXZEL, INC. 4911 Chlorine 244 209 0SD 19 NATL STEEL & SH 3731 Manganes Y 244 209

BA 10 CHEVRON PRODU 2911 Cr(VI) 1 209 1SC 16660 MCDONNELL DOUG3761 Cr(VI) 1 209 1SJU 50147 MCFARLAND ENERG1311 Formaldeh 3,649 37 208 1SC 8547 QUEMETCO INC 3341 Cadmium 24 172 207SJU 50142 MARATHON OIL S 1321 Formaldeh 3,610 37 206 1MOJ 8400589 US ARMY NATIONA9711 Chlorine 241 206 0VEN 1006 NAVAL BASE VEN 9711 DieselExh Y 405 206 14SC 800038 DOUGLAS PRODUC3721 DieselExh 401 205 14SC 800030 CHEVRON PRODUC2911 Ammonia 238,080 204 1SLO 24 CAL POLY STATE 9223 Acrolein Y 71 203 6SD 27 CANYON ROCK 1429 H2S Y 11,848 203 5BA 8664 CROCKETT COGEN4931 Ammonia 234,676 201 1VEN 137 WESTERN FARM S7389 Manganes 235 201SJU 50303 CHEVRON U.S.A. 1311 Acrolein 70 200 6MOJ 104801880 RELIANT ENERGY 4911 Acrolein 70 200 6VEN 54 VINTAGE PETROLE1311 Benzene Y 4,058 200 12 0NCU 37 EVERGREEN PULP,2611 AcetaldehyY 10,509 48 200SD 478 SOUTHWEST MARI3731 DieselExh 391 199 13MOJ 1200003 TXI RIVERSIDE 3241 2,3,7,8-T 0 199 13SC 19970 COMPRESSOR PAR7623 Cr(VI) 1 199 1SC 9120 CAL ELECTROPLAT3471 Cr(VI) 1 199 1NS 10006010 GEYSERS POWER 4911 Mercury Y 104 198 1NSI 1 SIERRA PACIFIC 2421 Benzene Y 4,010 198 11 0BA 12626 VALERO REFINING2911 Cadmium 23 165 198BA 778 SAN JOSE/SANTA 4952 H2S 11,531 197 5MOJ 104801880 RELIANT ENERGY 4911 Formaldeh 3,453 35 197 1BA 9013 INTERNATIONAL 4953 Vinyl Chlor 1,489 197 10 0BA 907 CENTRAL CONTRA4952 Formaldeh 3,433 35 196 1VEN 396 VENECO, INC. - 1311 DieselExh N 385 196 13SC 131003 BP WEST COAST P2911 Cr(VI) 1 196 1BUT 45 WEHAH FARMS, IN 723 Manganes Y 228 195SD 221 USMC BASE MARI 9711 Acrolein Y 68 194 6AV 122802129 LANCASTER LAND9511 Arsenic 34 191 194 3SAC 112 GRAFIL INC 2221 HCN Y 10,172 194 1SD 7263 OTAY LANDFILL I 4953 Acrylonitril Y 393 194 13SJU 508 DOLE ENTERPRIS 1311 Cr(VI) 1 194 1SJU 257 CHEVRON USA INC1311 Arsenic 34 190 193 3IMP 18 VAL-ROCK INC 2951 Cr(VI) Y 1 193 1SD 94 USN AIR STATION 9711 Cr(VI) Y 1 193 1LAK 50 CALPINE - WEST 4911 H2S Y 11,200 192 5SJU 50247 TANNEHILL OIL 1311 Nickel Y 56 25 192 0MOJ 8600591 MAGTFTC MCAGCC9711 Hydrazine 23 192 20SHA 59 FAWNDALE ROCK &2951 Cr(VI) 1 192 1SHA 51 BURNEY FOREST 2421 Ammonia 223,000 191 1SHA 18 SIERRA PACIFIC I 2421 Benzene 3,870 191 11 0SC 44577 LONG BEACH CITY9199 Cr(VI) 1 191 1TUO 15 SIERRA PACIFIC I 2421 Cr(VI) Y 1 191 1SD 963 DREW FORD 7532 Sulfuric Ac 1,112 190 0COL 55 WADHAM ENERGY 4931 Cadmium Y 22 159 190SJU 20890 NEWARK SIERRA 2621 Cadmium 22 159 190SC 18263 THE HARTWELL C 3599 Cr(VI) 1 190 1SJU 21150 SIMPSON PAPER 2521 Formaldeh Y 3,316 34 189 1KER 20 LEHIGH SOUTHWE3241 Manganes Y 221 189VEN 445 CAMARILLO SANIT4952 Phosphoru 77 189

SAC 118 A. TEICHERT & SO 2951 Cr(VI) Y 1 189 1BA 12626 VALERO REFINING2911 Formaldeh 3,290 34 188 1SLO 13 CONOCO PHILLIPS2911 Chlorine Y 219 188 0SC 69646 ORANGE COUNTY,4953 Formaldeh 3,272 33 187 1IMP 71 UNITS 1 AND 2 P 4911 Ammonia 218,772 187 1MBU 602 EXXONMOBIL CO 4612 Benzene 3,766 186 11 0TUO 1 SIERRA PACIFIC 2421 Cadmium Y 22 155 186MOJ 1500535 PG&E HINKLEY C 4922 Acrolein Y 65 185 6VEN 33 LA CONCHITA OIL 1311 Acrolein Y 64 184 6NSI 52 SIERRA AGGREGA1442 Arsenic 32 181 184 3FR 9999 BEALE AFB FACIL 9711 Arsenic Y 32 179 183 3SC 800426 PRIME WHEEL CO 3471 Nickel 53 24 183 0SJU 640 TREEHOUSE CALI 723 Methyl Bro 5,332 183 0NSI 3 SIERRA PACIFIC 2421 Manganes Y 214 183MOJ 19300771 FOUR CORNERS PI4612 Cr(VI) 1 183 1SJU 50160 MOBIL CHEMICAL 3086 Cr(VI) 1 183 1NSI 1 SIERRA PACIFIC 2421 Formaldeh Y 3,196 33 182 1KER 21 NATIONAL CEMEN 3241 Phosphoru Y 74 182SC 12332 GEN AMERICAN T 3743 DieselExh 356 182 12SHA 42 BURNEY MOUNTA 4931 Chlorine 211 181 0SC 800150 US GOVT, AF DEP 9711 DieselExh 355 181 12SHA 38 AGGREGATE PROD2951 Cr(VI) 1 181 1BA 16 CONOCOPHILLIPS 2911 Glutaraldh N 84 180BUT 2 BUTTE COUNTY R 723 Beryllium Y 7 30 179VEN 144 LOS ROBLES HOS 8062 Glutaraldh N 84 179SJU 20387 DIAMOND WALNUT5145 Cr(VI) Y 1 179 1SC 1703 EASTERN MUNICIP4952 Formaldeh 3,122 32 178 1SC 68112 TIDELANDS OIL P 1311 Formaldeh 3,122 32 178 1IMP 71 UNITS 1 AND 2 P 4911 Benzene 3,606 178 10 0IMP 51 J.M. LEATHERS 4911 Benzene 3,603 178 10 0BA 14628 TESORO REFININ 2911 B[a]P 95 178NS 10006026 SANTA ROSA GEOT4961 Arsenic 31 174 177 3SHA 18 SIERRA PACIFIC I 2421 Formaldeh 3,100 32 177 1SC 49111 SUNSHINE CANYO4953 Formaldeh 3,094 32 177 1TUO 12 PACIFIC-ULTRAP 4911 Nickel Y 52 23 177 0NCU 96 DG FAIRHAVEN P 4911 Nickel Y 52 23 177 0SC 138097 CASTLE PEAK RE 1311 Acrolein 62 176 6SAC 194 SACRAMENTO PO 4931 Acrolein 61 175 6SD 8201 CA PLATING 3471 Nickel Y 51 23 175 0SC 9496 BENDER MACHINE,3599 Nickel Y 51 22 174 0SJU 50140 M.H. WHITTIER, 1311 Glutaraldh 81 174SAC 1117 INTEL CORPORAT 3674 DieselExh 339 173 12SC 800202 UNIVERSAL CITY S7812 DieselExh 338 172 12SJU 50047 CHEVRON USA 17Z1321 Acrolein 60 171 5SJU 257 CHEVRON USA INC1311 Mercury 90 171 1KER 21 NATIONAL CEMEN 3241 EpichlorohyY 3,001 117 171 0FR 19002 CUSTOM CHROME3471 Nickel 50 22 171 0SJU 20653 J.R. SIMPLOT CO 2873 Chlorine 200 171 0NSI 52 SIERRA AGGREGA1442 Beryllium 7 28 171BA 187 PACIFIC STEEL C 3325 Manganes 200 171SC 74396 CITY OF CERRITOS4941 Acrolein 60 170 5SC 8582 SO CAL GAS CO/P 4923 Formaldeh 2,977 30 170 1SD 27 CANYON ROCK 1429 Nickel Y 50 22 170 0MBU 1186 CEMEX - CEMENT 3241 DieselExh 333 170 11

BA 16 CONOCOPHILLIPS 2911 Mercury N 89 169 1SC 800327 GLENDALE CITY, 4931 Cadmium 20 141 169SC 9961 RIVERSIDE CITY, 4941 Formaldeh 2,941 30 168 1MBU 1015 OWL COMPANIES 7011 Formaldeh 2,927 30 167 1SC 131003 BP WEST COAST P2911 DieselExh 328 167 11SC 100844 MEDALLION CALI 1311 Acrolein 58 166 5VEN 445 CAMARILLO SANIT4952 H2S 9,674 166 4SC 800089 EXXONMOBIL OIL 2911 Arsenic 29 163 166 3SHA 2 LEHIGH SOUTHWE3241 Mercury 87 166 1KER 47 EDWARDS AIR FO 9711 DieselExh Y 326 166 11SC 11818 HIXSON METAL FI 3471 Cr(VI) 1 166 1SC 800035 CONTINENTAL AIR4512 Cr(VI) Y 1 165 1MOJ 8600591 MAGTFTC MCAGCC9711 Nickel 48 21 163 0SJU 50122 J.G. BOSWELL 729 Cr(VI) 1 162 1SJU 20929 PACIFIC ENERGY 4911 Acrolein 57 161 5SJU 50256 TEXACO - BAKERS1311 H2S 9,411 161 4NS 10006028 NORTHERN CALIF 4961 H2S 9,383 161 4SC 4477 SO CAL EDISON C 4911 1,3-Butadi 556 161 5SJU 494 BIDART BROS. FE 211 Cr(VI) 1 161 1SC 132687 PRODUCTIVITY CA3089 Formaldeh 2,810 29 160 1BA 16 CONOCOPHILLIPS 2911 Nickel N 47 21 160 0KER 20 LEHIGH SOUTHWE3241 Mercury Y 84 159 1SC 800288 UNIV CAL IRVINE 8221 DieselExh 312 159 11SC 17301 ORANGE COUNTY 4952 Acrolein 55 158 5SJU 742 LAMOURE'S CLEA 7216 Perc 15,620 157 76 0SC 131249 BP WEST COAST 2999 Cadmium 18 131 157SJU 40032 CHEVRON - COAL 1311 Beryllium 6 26 157SJU 122 MALIBU BOATS WE3732 MeDiphenD 641 157SC 132954 ALL AMERICAN A 2951 Nickel 45 20 156 0BA 2371 USS-POSCO INDU 3312 HCl 8,196 156 0SC 115394 AES ALAMITOS, L 4911 Ammonia 180,521 155 1SJU 10427 GALLO GLASS CO 3221 Cadmium Y 18 130 155SD 415 APPLIED ENERGY 4931 Formaldeh Y 2,696 28 154 0SJU 40105 FRESNO VALVES &3369 Cr(VI) Y 1 154 1IMP 65 PLANT EAST MESA4911 DieselExh Y 299 153 10SAC 127 TELEDYNE MEC 3679 Cr(VI) 1 153 1SC 119907 BERRY PETROLE 1311 Formaldeh 2,656 27 152 0SJU 20387 DIAMOND WALNUT5145 Benzene Y 3,088 152 9 0NS 10006026 SANTA ROSA GEOT4961 Manganes 177 152SC 800236 LA CO. SANITATIO 4952 DieselExh 299 152 10KER 9 CALIFORNIA POR 3241 Cr(VI) Y 1 152 1SHA 42 BURNEY MOUNTA 4931 Benzene 3,060 151 9 0SC 18452 UNIVERSITY OF C 8221 DieselExh 295 151 10SJU 50234 SHELL WESTERN E1311 Formaldeh 2,628 27 150 0SD 19 NATL STEEL & SH 3731 Nickel Y 44 19 150 0SJU 4017 PARAMOUNT HULL 723 Phosphine 702 150SC 20197 LAC/USC MEDICA 8062 DieselExh Y 295 150 10SC 140871 PAC RANCHO, INC3325 Nickel 44 19 149 0SC 800026 ULTRAMAR INC (N 2911 Nickel 44 19 149 0SC 800370 EQUILON ENTER., 2911 Benzene 3,021 149 9 0SD 6974 RIDGEWOOD CALI 4931 Formaldeh 2,599 27 148 0MOJ 1200003 TXI RIVERSIDE 3241 Nickel 43 19 148 0SAC 106 REGIONAL SANITA4952 H2S 8,567 147 3SC 65818 CRESTLINE-LAKE 4941 Acrolein 51 146 5

SJU 20653 J.R. SIMPLOT CO 2873 HF 11,850 145 1SJU 50027 BUTTONWILLOW G 724 Cr(VI) 1 145 0SJU 50142 MARATHON OIL S 1321 Benzene 2,923 144 8 0SC 800193 LA CITY, DWP VA 4911 Ammonia 167,259 143 1BA 8664 CROCKETT COGEN4931 Formaldeh 2,506 26 143 0SC 45448 GAS RECOVERY S4911 Cadmium 17 119 143SJU 50234 SHELL WESTERN E1311 Manganes 167 143SC 800038 DOUGLAS PRODUC3721 Cr(VI) 1 143 0BA 11 SHELL MARTINEZ 2911 B[a]P 77 143SD 6129 APPLIED MICRO C 3674 Sulfuric Ac 829 142 0MOJ 11800001 MITSUBISHI CEME 3241 Formaldeh Y 2,479 25 141 0SD 5270 APPLIED ENERGY 4931 Formaldeh 2,472 25 141 0FR 9999 BEALE AFB FACIL 9711 Beryllium Y 6 24 141SJU 861 NATIONAL RAISI 723 Phosphine 658 141SJU 230 CAMPOS BROTHE 723 Phosphine 657 141BA 17 HANSON PERMAN 3241 Naphthale 2,445 141 47NS 10006006 GEYSERS POWER 4911 Ammonia Y 164,000 140 1SJU 50242 STOCKDALE OIL & 1311 Nickel 41 18 140 0SC 14150 CAL ST, INST FO 9223 Asbestos 1 140SC 16211 MOTION PICTURE 8051 Acrolein 49 139 4MOJ 102102392 HESPERIA SANITA9511 DieselExh 272 139 9NS 10006025 UNOCAL GEOTHER4961 Arsenic 24 135 138 2SC 800327 GLENDALE CITY, 4931 2,3,7,8-T 0 138 9SC 800327 GLENDALE CITY, 4931 1-3,7,8Pe 0 138 9MBU 1186 CEMEX - CEMENT 3241 PCB 169 0 138 9SD 540 CABRILLO POWER 4911 Cr(VI) Y 1 138 0SC 73022 US AIRWAYS INC 4512 Cr(VI) 1 138 0BA 17 HANSON PERMAN 3241 Formaldeh 2,396 24 137 0VEN 244 ARCTURUS MANU 3463 Nickel N 40 18 137 0SC 800030 CHEVRON PRODUC2911 Chlorine 160 137 0VEN 22 HALACO ENGINEE 3341 Manganes Y 161 137BA 16 CONOCOPHILLIPS 2911 Naphthale N 2,365 137 45AV 102301816 NORTHROP GRUM3721 DieselExh 269 137 9KER 3 ASPHALT CONSTR2951 Asbestos Y 1 137SC 800026 ULTRAMAR INC (N 2911 H2S 7,927 136 3SJU 299 UNOCAL OIL & GAS1311 Arsenic 24 134 136 2SAC 3078 SAVE ON DRY CL 7216 Perc 13,581 136 66 0KER 20 LEHIGH SOUTHWE3241 Cadmium Y 16 113 136MBU 1186 CEMEX - CEMENT 3241 Acetaldehy 7,160 33 136BA 2371 USS-POSCO INDU 3312 Cr(VI) 1 136 0SJU 40152 MADERA GLASS 3221 Arsenic 24 132 135 2SC 68042 CORONA ENERGY 4931 Glutaraldh 63 135VEN 388 SENECA RESOURC1311 Formaldeh Y 2,349 24 134 0NCU 59 P G & E - HUMBO 4911 Manganes Y 156 134SC 52886 GARDEN GROVE CI4941 Acrolein 47 133 4SD 27 CANYON ROCK 1429 Formaldeh Y 2,325 24 133 0SC 94998 THE GAGE CANAL 4941 Acrolein 46 132 4VEN 22 HALACO ENGINEE 3341 Nickel Y 38 17 132 0NS 10006020 NCPA UNIT 4 4911 Benzene Y 2,681 132 8 0BA 5095 REPUBLIC SERVI 4953 Vinyl Chlor 994 132 7 0SHA 43 WHEELABRATOR SH4931 Manganes 154 132SJU 20921 OWENS-BROCKWA3221 Arsenic 23 129 131 2IMP 43 ORMAT NEVADA, 4911 Ammonia Y 152,770 131 1SC 800026 ULTRAMAR INC (N 2911 Formaldeh 2,302 23 131 0

SC 35302 OWENS CORNING 2952 Nickel 38 17 131 0COL 57 ABA ENERGY COR1311 Chlorine 153 131 0SD 251 PACIFIC GAS TUR 3724 1,3-Butadi 452 131 4SC 800170 LA CITY, DWP HA 4911 Formaldeh 2,270 23 130 0SC 800026 ULTRAMAR INC (N 2911 Acetaldehy 6,844 31 130BA 55 LOCKHEED MARTI 3761 Cr(VI) 1 130 0SC 11174 BRONZEWAY PLAT3471 Cr(VI) 1 130 0KER 20 LEHIGH SOUTHWE3241 Arsenic Y 23 126 129 2SC 83509 THE TERMO CO 1311 Acrolein 45 128 4SAC 195 SACRAMENTO CO 4931 Acrolein 45 128 4SJU 50290 WATERMAN FOUN 3321 Cr(VI) 1 128 0SC 139579 SPS TECHNOLOGI 3452 Cr(VI) 1 128 0SJU 50243 STYROTEK INC. 2821 Chlorine 149 127 0SJU 20777 LODI METAL TECH2542 EGBE 14,804 127 0SJU 257 CHEVRON USA INC1311 Beryllium 5 21 127SD 7270 HANSON AGGREGA1429 Manganes 148 127SD 88196 SAN DIEGO CITY 4953 Arsenic 22 124 126 2SC 1912 SADDLEBACK COM8221 Formaldeh 2,200 22 126 0SC 42645 BRITE PLATING C 3471 Nickel 37 16 126 0SAC 3014 CAMELLIA ENTER 7216 Perc 12,599 126 62 0LAS 16 MT. LASSEN POW 4931 Benzene Y 2,558 126 7 0LAS 15 H.L. POWER COM 4931 Phosphoru Y 51 126GBU 3050309 COSO OPERATING4961 Arsenic Y 22 123 125 2VEN 970 DOS CUADRAS OF1311 Formaldeh Y 2,196 22 125 0BA 1634 NAPA STATE HOSP8063 Formaldeh 2,188 22 125 0PLA 34 SIERRA PACIFIC 2421 Formaldeh 2,184 22 125 0KER 28 U.S. BORAX 1474 Nickel Y 36 16 125 0BA 12626 VALERO REFINING2911 Benzene 2,545 125 7 0SD 309 SALK INSTITUTE 8733 Formaldeh 2,180 22 124 0SJU 50303 CHEVRON U.S.A. 1311 Formaldeh 2,175 22 124 0SC 68838 A 2 Z PLATING CO 3471 Cadmium 15 104 124SD 3228 PRATT & WHITNEY3724 Cr(VI) 0 124 0MBU 577 LSP MOSS LANDIN4911 Acrolein 43 123 4LAK 240 CALPINE UNIT 16 4911 H2S Y 7,204 123 3SC 800236 LA CO. SANITATIO 4952 Chloroform 13,706 123 8 2SJU 20387 DIAMOND WALNUT5145 Cadmium Y 14 103 123SJU 566 LIQUID WASTE MA4953 Naphthale 2,136 123 41SHA 38 AGGREGATE PROD2951 DieselExh 241 123 8SD 540 CABRILLO POWER 4911 Arsenic Y 21 120 122 2BA 1605 CHEVRONTEXACO 6552 Formaldeh 2,142 22 122 0BA 6044 O L S ENERGY-A 4931 Formaldeh 2,138 22 122 0SD 19 NATL STEEL & SH 3731 Cadmium Y 14 102 122MOJ 27000935 AFG INDUSTRIES I3211 DieselExh 239 122 8SC 3887 JAN-KENS ENAMEL3479 Cr(VI) 0 122 0BA 568 SAN FRANCISCO 4952 H2S 7,068 121 3MOJ 9600500 BARSTOW, CITY O4952 Chlorine Y 141 121 0SJU 50177 NAVAL PETROLEU1311 Chlorine 141 121 0SJU 862 NICHOLS PISTACH 173 Phosphine 567 121IMP 47 NEW CHARLESTON4911 Manganes 141 121SC 20302 RESINART CORP 3089 Naphthale 2,100 121 40SC 800089 EXXONMOBIL OIL 2911 Cr(VI) 0 121 0BUT 2 BUTTE COUNTY R 723 Cr(VI) Y 0 121 0SC 6815 AIR INDUSTRIES 3452 Cr(VI) 0 121 0NS 10006021 SONOMA POWER 4911 Ammonia Y 140,000 120 1

SHA 42 BURNEY MOUNTA 4931 Formaldeh 2,110 22 120 0NS 10006026 SANTA ROSA GEOT4961 Nickel 35 15 120 0SAC 200 GRANITE CONSTR2951 Nickel Y 35 15 120 0SD 96224 MINNESOTA METHA4931 HCl 6,285 120 0BA 31 DOW CHEMICAL 2879 CCl4 1,675 120 7 0SC 9163 INLAND EMPIRE U 4959 DieselExh 236 120 8SC 16338 KAISER ALUMINU 3354 Cr(VI) 0 120 0SC 15509 US GOVT, AF DEPT,9711 Asbestos 1 120SC 660 AMERIGAS PROPAN5171 Acrolein 42 119 4SD 251 PACIFIC GAS TUR 3724 Formaldeh 2,083 21 119 0SJU 40128 J.G. BOSWELL OIL 723 Cadmium 14 100 119SHA 43 WHEELABRATOR SH4931 Formaldeh 2,069 21 118 0SD 517 UCSD 8221 Formaldeh Y 2,060 21 118 0NS 10006028 NORTHERN CALIF 4961 Manganes 138 118SJU 50140 M.H. WHITTIER, 1311 Acrolein 41 117 4IMP 15 IMPERIAL IRRIGAT4911 Formaldeh Y 2,056 21 117 0SC 43436 TST, INC. 3341 Formaldeh 2,045 21 117 0SAC 201 SILGAN CAN COM 3411 EGBE Y 13,669 117 0SAC 141 DRY CLEAN TODA 7211 Perc 11,636 117 57 0SC 45448 GAS RECOVERY S4911 1-3,7,8Pe 0 117 8SC 45448 GAS RECOVERY S4911 2,3,7,8-T 0 117 8SD 88196 SAN DIEGO CITY 4953 H2S 6,768 116 3SD 118 CP KELCO 2099 Formaldeh Y 2,036 21 116 0SC 139010 RIPON COGENERA4911 Formaldeh 2,030 21 116 0SC 131249 BP WEST COAST 2999 Nickel 34 15 116 0SJU 50160 MOBIL CHEMICAL 3086 Naphthale 2,002 116 38SC 800234 LOMA LINDA UNIV 8221 DieselExh 227 116 8MOJ 1500535 PG&E HINKLEY C 4922 1,3-Butadi Y 402 116 3MOJ 35601021 CASTLE MOUNTAI 1041 Cr(VI) Y 0 116 0SC 2212 LA CITY, LA-GLE 4953 TetraClEth 1,180 116SJU 20118 APPLIED AEROSP 3728 Asbestos 1 116NS 10006004 GEYSERS POWER 4911 Ammonia Y 134,000 115 1NS 10006016 GEYSERS POWER 4911 Ammonia Y 134,000 115 1NS 10006005 GEYSERS POWER 4911 Ammonia Y 134,000 115 1PLA 28 SIERRAPINE LTD 2493 Formaldeh 2,017 21 115 0BA 2254 SONOMA COUNTY 4953 Vinyl Chlor 866 115 6 0SJU 50140 M.H. WHITTIER, 1311 Cadmium 13 96 115SC 126191 STERIGENICS US, 7389 EtO 769 115 4BA 703 PACIFIC STEEL C 3325 Nickel 33 15 114 0SC 800037 DEMENNO/KERDO 2992 DieselExh 223 114 8SJU 1130 CHEVRON U S A I 1311 Acrolein 40 113 4AV 102301816 NORTHROP GRUM3721 Acrolein 40 113 4MOJ 1500039 PG&E TOPOCK CO4922 Acrolein Y 40 113 4SD 4845 USN NAV STA 1 S 9711 Nickel Y 33 15 113 0SC 6384 LA CO., RANCHO 8062 Chlorine 132 113 0SC 6643 TECHNICOLOR IN 7819 Perc 11,300 113 55 0IMP 49 J.J. ELMORE 4911 Benzene 2,298 113 7 0SC 131003 BP WEST COAST P2911 Acetaldehy 5,882 27 112SC 113873 MM WEST COVINA 4911 2,3,7,8-T 0 112 7SC 113873 MM WEST COVINA 4911 1-3,7,8Pe 0 112 7SC 126060 STERIGENICS US, 7389 EtO 748 112 4SHA 2 LEHIGH SOUTHWE3241 Cr(VI) 0 112 0SC 127468 GRANITE CONSTR2951 Nickel 32 14 111 0SC 800362 CONOCOPHILLIPS 2911 DieselExh 218 111 7

VEN 3 RINCON ISLAND L 1311 DieselExh Y 218 111 7SD 4824 MCAS MIRAMAR 9711 1,3-Butadi Y 383 111 3NS 10006011 GEYSERS POWER 4911 Ammonia Y 128,000 110 1SC 20197 LAC/USC MEDICA 8062 Formaldeh Y 1,919 20 110 0SJU 40017 CALIF STATE UNI 8221 Chlorine 129 110 0COL 114 PETSEC(AA PROD 1311 Chlorine 129 110 0SJU 15 WESTERN COTTON2074 Beryllium 4 18 110BUT 21 SUNWEST MILLING 723 Manganes 128 110BA 14628 TESORO REFININ 2911 Cr(VI) 0 110 0SC 54773 LAS VIRGENES MU4941 Acrolein 38 109 3SC 124838 EXIDE TECHNOLO 3341 Cadmium 13 91 109NSI 3 SIERRA PACIFIC 2421 Cadmium Y 13 91 109SAC 1028 DAVISON IRON W 3441 Manganes N 128 109SJU 50002 ARCO OIL AND G 1311 Phosphoru 45 109SC 16575 TRIGEN-LA ENER 4961 Formaldeh 1,896 19 108 0VEN 143 VENTURA CO - R 8062 DieselExh Y 212 108 7SJU 50113 HIGH SIERRA LIM 4911 Formaldeh 1,870 19 107 0MOJ 35601021 CASTLE MOUNTAI 1041 Copper Y 1,502 107 0SC 131003 BP WEST COAST P2911 Benzene 2,168 107 6 0SJU 41 ANDERSON CLAYT2074 Beryllium 4 18 107NS 10006015 GEYSERS POWER 4911 Ammonia Y 124,000 106 1SJU 50170 MONARCH COGENE4931 Ammonia 123,867 106 1IMP 54 AMERICAN GIRL M1041 Nickel 31 14 106 0SHA 51 BURNEY FOREST 2421 Nickel 31 14 106 0SC 800320 AMVAC CHEMICAL2879 HCl 5,591 106 0SD 2643 USN SUBMARINE 9711 DieselExh Y 208 106 7SJU 2133 REFINERIES SERV1382 Acrolein 37 105 3SC 124838 EXIDE TECHNOLO 3341 Sulfuric Ac 613 105 0SJU 40115 GWF POWER SYST4911 HCl 5,508 105 0BA 11 SHELL MARTINEZ 2911 Benzene 2,138 105 6 0SC 800189 DISNEYLAND RES 7996 MeDiphenD 429 105SD 8124 VISION SYSTEMS 1721 Cr(VI) 0 105 0SC 9053 TRIGEN- LA ENER 4961 Acrolein 37 104 3SD 99 ROHR INC 3728 Acrolein Y 36 104 3SHA 255 KNAUF FIBER GL 3296 Ammonia 121,000 104 1SC 129497 THUMS LONG BEA4911 Formaldeh 1,820 19 104 0SD 4824 MCAS MIRAMAR 9711 Formaldeh Y 1,817 19 104 0SHA 18 SIERRA PACIFIC I 2421 Chlorine 122 104 0SJU 50192 PETROLITE CORP 2899 Naphthale 1,808 104 34SC 22092 WESTERN TUBE & 3317 Acrolein 36 103 3MOJ 11800001 MITSUBISHI CEME 3241 Arsenic Y 18 101 103 2SJU 179 TRIANGLE PACIFI 2434 Formaldeh 1,802 18 103 0VEN 4 VINTAGE PETROLE1311 Formaldeh Y 1,798 18 103 0AV 95401734 FAA AIRWAYS 9621 DieselExh 201 103 7VEN 997 NAVAL BASE VEN 9711 Cr(VI) Y 0 103 0SC 11362 HR TEXTRON INC 3728 Cr(VI) 0 103 0BA 16 CONOCOPHILLIPS 2911 Ammonia N 118,628 102 1SD 8469 GOAL LINE LP 4931 Formaldeh 1,792 18 102 0SD 6056 NORTHROP GRUMM3674 Formaldeh 1,783 18 102 0KER 572 RAND MINING CO 1041 Nickel 30 13 102 0ED 7 SIERRA PACIFIC 2421 Benzene Y 2,078 102 6 0SC 800057 KINDER MORGAN L4226 Benzene 2,065 102 6 0NS 10006025 UNOCAL GEOTHER4961 Bromine 1,010 102MOJ 100005 CEMEX - BLACK 3241 Manganes Y 119 102

KER 501 PRC-DESOTO INT 2891 Strontium 2 102 0SJU 50997 MOBIL 1311 Acrolein 36 101 3MBU 602 EXXONMOBIL CO 4612 H2S 5,886 101 2BA 10 CHEVRON PRODU 2911 Formaldeh 1,766 18 101 0LAS 16 MT. LASSEN POW 4931 Formaldeh Y 1,764 18 101 0SC 68118 TIDELANDS OIL 1311 Formaldeh 1,763 18 101 0SJU 285 DIAMOND WALNUT 723 Propylene Y 16,020 101 91 0BA 2740 CITY OF MOUNTAI 4953 Vinyl Chlor 757 100 5 0

max177,336

94,31652,21843,48336,46528,20424,04521,21219,93417,01615,41313,88412,97911,62611,52010,660

9,7099,1948,6048,4028,0137,8187,4857,3287,2887,1666,4656,3606,2866,2146,1476,0035,9515,9175,8595,7695,6415,5425,5025,1664,9674,6164,6074,4604,3244,2534,1774,1204,1184,0223,7333,7263,600

3,4613,4433,4313,3923,3133,2573,2293,1303,1113,1033,0993,0493,0192,9932,9602,9582,9392,9162,9112,8982,8722,8462,8432,8162,7052,6692,6282,6032,6032,5552,5442,5392,5382,5302,4312,4122,3982,3492,3462,3342,3272,3082,2652,2332,1492,1402,0832,0642,0452,0251,9951,9831,9831,958

1,9381,9291,9021,8981,8811,8621,8551,8541,8391,8351,8241,8071,7941,7871,7711,7631,7531,7331,7301,7061,6581,6491,6461,6411,6381,6341,6251,5851,5651,5611,5511,5301,5261,5141,5001,4831,4801,4701,4461,4451,4431,4281,4211,4201,3921,3631,3401,3401,3011,3001,2511,2501,2501,241

1,2371,2341,2341,2281,2251,2241,2141,2081,1751,1691,1671,1661,1641,1641,1581,1451,1321,1301,1071,1061,0981,0971,0951,0891,0791,0751,0731,0641,0521,0521,0411,0301,0241,0231,0181,0151,0131,0131,008

999984983983959956950948920918915913911905905

898888882874870867864860853848836832822819817816811801799799796795794793788785785773772767760760754753751748746743724720718715715714706704701698689686671669668666

666662658657656653644643641637634631629626625620617617613613612609608605602599598596588586584582581581579578577574574563563563560553551550547545544544538538536536

533532524523522522517510509509506506503501501500495492492487481481479478478477477473473472472469467466462461461460460456454454454453451451450448448444440437437437

435435432427427426424424420419419418417415413411410409408408406403403403403402401395389388388385385385381381378377375374373371368362361361359358358356356355353353

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169169168167167166166166166166166165163162161161161161161160160159159158157157157157156156155155154154153153152152152152152151151150150150150149149149148148147146

145145144143143143143143143142141141141141141141140140140139139138138138138138138137137137137137137137136136136136136136135135134134133133132132132132132131131131

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102101101101101101101100

2005

file:///tt/file_convert/5aec7b747f8b9a36698faad5/document.xls 2005

DIS FACID FNAME FSIC POLABBR CTEMS CANCER_CHRONIC ACUTE maxSJU 625 CALMAT CO. 1446 Asbestos 1647 177,336 177,336SC 11192 HI-SHEAR CORPORATION 3452 Cr(VI) 362 92,221 310 92,221SJU 50234 SHELL WESTERN E&P INC. 1311 Nickel 15248 6,739 52,218 44 52,218SJU 40032 CHEVRON - COALINGA/KET 1311 Nickel 8236 3,640 28,204 24 28,204FR 9999 BEALE AFB FACILITY WIDE 9711 Nickel Y 7021 3,103 24,045 20 24,045SJU 257 CHEVRON USA INC. 1311 Nickel 6194 2,738 21,212 18 21,212SC 22551 THUMS LONG BEACH CO, UN1311 Glutaraldh Y 7950 17,016 17,016SJU 50140 M.H. WHITTIER, CORPORAT 1311 Nickel 4501 1,989 15,413 13 15,413GBU 3050309 COSO OPERATING COMPANY4961 H2S Y 810800 13,884 331 13,884MOJ 900002 SEARLES VALLEY MINERAL 1474 H2S 757956 12,979 309 12,979SJU 10316 DEL MONTE USA PLANT #1 2033 Cr(VI) 46 11,626 39 11,626SC 12129 BEVERLY HOSPITAL 8062 Asbestos 102 11,020 11,020GBU 5 DESERT AGGREGATES 2951 Cr(VI) Y 42 10,660 36 10,660SJU 257 CHEVRON USA INC. 1311 H2S 536912 9,194 219 9,194SC 25786 SEVEN-UP/ROYAL CROWN B 2086 Chlorine 10050 8,604 1 8,604SJU 40208 SANTA FE ENERGY RESOURC1311 Nickel 2453 1,084 8,402 7 8,402IMP 15 IMPERIAL IRRIGATION DISTR4911 Chlorine Y 9132 7,818 1 7,818SJU 299 UNOCAL OIL & GAS DIVISIO 1311 Nickel 2186 966 7,485 6 7,485SJU 247 MOBIL EXPLORATION AND 1311 Nickel 2140 946 7,328 6 7,328SJU 50098 GOLDEN STATE METALS, INC5093 Asbestos 68 7,288 7,288SC 90847 KLUNE INDUSTRIES INC 3728 Cr(VI) 27 6,913 23 6,913KER 9 CALIFORNIA PORTLAND CEM3241 Asbestos Y 60 6,465 6,465IMP 49 J.J. ELMORE 4911 H2S 367088 6,286 150 6,286VEN 1266 MASON CONSTRUCT & ENGI 1629 DieselExh 12185 6,214 417 6,214NS 10006028 NORTHERN CALIFORNIA PO 4961 Arsenic 1052 5,900 6,003 95 6,003IMP 47 NEW CHARLESTON POWER L4911 Chlorine 6951 5,951 1 5,951SB 1735 CELITE CORPORATION 3295 Acrolein 2063 5,888 186 5,888FR 2023 TRI-UNION 1311 Chlorine N 6843 5,859 1 5,859MBU 1482 UCSC 8221 DieselExh 11311 5,769 387 5,769MOJ 8400589 US ARMY NATIONAL TRAININ9711 DieselExh 11060 5,641 379 5,641AV 10231816 NORTHROP GRUMMAN 3721 Strontium 87 5,542 19 5,542SC 141878 SWIFT-COR AEROSPACE IN 3444 Cr(VI) 21 5,457 18 5,457SJU 50234 SHELL WESTERN E&P INC. 1311 Phosphoru 2112 5,166 5,166SAC 160 CONSOLIDATED FABRICATO 3714 Lead Chro Y 122 4,967 17 4,967AV 115902005 FRESH AIR ENVIRONMENTA 1742 Asbestos 43 4,607 4,607YS 5011 CALIFORNIA STATE PRISON 9223 Sodium Hyd 121618 4,339 260 4,339SJU 247 MOBIL EXPLORATION AND 1311 H2S 252547 4,324 103 4,324SC 800128 SO CAL GAS CO (EIS USE) 4922 Acrolein 1412 4,029 127 4,029SJU 21419 THE WINE GROUP INC 2084 Cr(VI) 15 3,726 13 3,726KER 572 RAND MINING COMPANY 1041 Arsenic 631 3,538 3,600 57 3,600SJU 1130 CHEVRON U S A INC 1311 H2S 202140 3,461 82 3,461NS 10006018 NCPA UNIT 2 4911 Arsenic Y 603 3,384 3,443 54 3,443SHA 51 BURNEY FOREST PRODUCT 2421 Acrolein 1161 3,313 105 3,313NS 10006011 GEYSERS POWER CO UNIT 4911 H2S Y 190200 3,257 78 3,257MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Arsenic Y 545 3,057 3,111 49 3,111NS 10006010 GEYSERS POWER CO UNIT 4911 H2S Y 181000 3,099 74 3,099NS 10006005 GEYSERS POWER CO UNIT 4911 H2S Y 113200 1,938 46 1,938SB 1325 THE POINT ARGUELLO PRO 1311 Acrolein N 653 1,864 59 1,864NCU 37 EVERGREEN PULP, INC 2611 Sodium HydY 51967 1,854 111 1,854SB 2667 BREITBURN ENERGY- ORCUT1311 Acrolein N 507 1,448 46 1,448

SC 3671 EISENHOWER MEDICAL CEN8062 Acrolein 500 1,426 45MBU 1186 CEMEX - CEMENT PLANT 3241 Acrolein 485 1,384 44

2005


SD 251 PACIFIC GAS TURBINE CENT3724 Acrolein 469 1,340 42NS 10006006 GEYSERS POWER CO UNIT 4911 H2S Y 103400 1,771 42SC 7796 TECHNI-CAST CORP 3366 Acrolein 436 1,245 39IMP 45 EARTH ENERGY, INC. 4911 H2S 96155 1,646 39NS 10006025 UNOCAL GEOTHERMAL DIVI 4961 H2S 95652 1,638 39SD 4824 MCAS MIRAMAR 9711 Acrolein Y 393 1,121 35SJU 50305 MOBIL 1311 Acrolein 353 1,008 32NS 10006007 GEYSERS POWER CO UNIT 4911 H2S Y 72500 1,241 30IMP 54 AMERICAN GIRL MINE 1041 Arsenic 325 1,823 1,855 29SB 5019 SO CAL GAS - LA GOLETA 4922 Acrolein 317 905 29NCU 37 EVERGREEN PULP, INC 2611 Acrolein Y 303 864 27LAK 290 CALPINE - CALISTOGA GEO 4911 H2S Y 66870 1,145 27SJU 50308 TEXACO USA, VENTURA PR 1311 H2S 66009 1,130 27SC 1912 SADDLEBACK COMMUNITY C8221 Acrolein 295 841 27SJU 50306 MOBIL 1311 Acrolein 288 822 26SD 94 USN AIR STATION NORIS 9711 Acrolein Y 270 771 24NS 10006020 NCPA UNIT 4 4911 H2S Y 59183 1,013 24SB 2658 CAT CANYON 1311 Acrolein N 263 752 24NS 10006004 GEYSERS POWER CO UNIT 4911 H2S Y 53750 920 22NS 10006015 GEYSERS POWER CO UNIT 4911 H2S Y 47839 819 20VEN 41 AERA ENERGY LLC 1311 Acrolein Y 215 613 19BA 591 EAST BAY MUNICIPAL UTILIT4952 Acrolein 203 581 18NS 10006012 GEYSERS POWER CO UNIT 4911 H2S Y 44800 767 18SJU 50054 CITY OF TULARE 9511 H2S 43990 753 18NS 10006016 GEYSERS POWER CO UNIT 4911 H2S Y 43400 743 18SB 27 VENOCO - CARPINTERIA 1311 Acrolein Y 192 548 17SB 8012 PLATFORM HABITAT 1311 Acrolein Y 189 538 17IMP 43 ORMAT NEVADA, INC 4911 H2S Y 41670 714 17KER 21 NATIONAL CEMENT CO 3241 Acrolein Y 188 536 17PLA 44 RIO-BRAVO 4911 Ammonia 3160000 2,705 17KER 28 U.S. BORAX 1474 As cmpd(inY 186 1,046 1,064 17SC 20445 BIOLA UNIVERSITY 8221 Acrolein 171 489 15IMP 53 PLANT EAST MESA PEM UNIT4911 H2S 32866 563 13SC 130211 PAPER-PAK INDUSTRIES 2621 Acrolein 144 412 13SJU 50308 TEXACO USA, VENTURA PR 1311 Acrolein 143 408 13SJU 257 CHEVRON USA INC. 1311 Acrolein 142 406 13SHA 164 PACIFIC GAS & ELECTRIC 4922 Acrolein 141 403 13SB 1325 THE POINT ARGUELLO PRO 1311 Formaldeh N 69541 709 3,969 13TUO 1 SIERRA PACIFIC IND. STAN 2421 Arsenic Y 140 785 799 13MBU 926 MONTEREY REGION WASTE 4953 Acrolein 139 395 12SJU 40164 PIRELLI ARMSTRONG TIRE 3011 Acrolein 136 388 12AV 113301969 AMERICAN TOWER HAUSER 3669 Acrolein 135 385 12SC 77388 WESTERN MUNICIPAL WATER4941 Acrolein 132 378 12NS 10006018 NCPA UNIT 2 4911 H2S Y 26947 461 11IMP 45 EARTH ENERGY, INC. 4911 Arsenic 120 674 686 11SJU 50147 MCFARLAND ENERGY, INC. 1311 Acrolein 119 340 11SJU 40026 CERTAINTEED CORPORATI 3296 Formaldeh Y 52888 539 3,019 10SC 121737 MOUNTAINVIEW POWER CO 4911 Acrolein 107 304 10SC 800089 EXXONMOBIL OIL CORPORA 2911 Arsenic 103 579 589 9SJU 50178 NAVAL PETROLEUM RESERV1311 Formaldeh 51007 520 2,911 9SJU 40224 SHELL WESTERN E & P INC. 1311 Acrolein 101 289 9SB 1073 E & B - SOUTH CUYAMA 1311 Acrolein N 98 279 9BA 11 SHELL MARTINEZ REFINERY 2911 Formaldeh 46760 477 2,669 9SJU 50234 SHELL WESTERN E&P INC. 1311 Arsenic 94 529 538 8

2005


SC 70913 LANGER JUICE COMPANY, I 2033 Acrolein 94 267 8SB 4639 ELYSIUM RUSSELL, LLC. 1311 Acrolein 93 266 8SB 4630 CASMALIA 1311 Acrolein 92 262 8SC 29110 ORANGE COUNTY SANITATIO4952 Formaldeh 45138 460 2,576 8SJU 40149 M.H. WHITTIER CORPORATI 1311 H2S 19794 339 8MBU 23 AERA ENERGY LLC 1311 H2S 19530 334 8SC 21104 HUNTINGTON BEACH CITY, 9511 Acrolein 88 251 8SC 50299 SAN BER CNTY SOLID WAST 4953 Acrolein 87 247 8SC 142417 TOYON LANDFILL GAS CONV4911 Acrolein 86 245 8SC 4477 SO CAL EDISON CO 4911 Acrolein 86 244 8VEN 36 PACIFIC CUSTOM MATERIAL 3259 Acrolein Y 85 244 8SC 98159 BREITBURN ENERGY CORP 1311 Acrolein 85 243 8SB 1735 CELITE CORPORATION 3295 Formaldeh 41749 426 2,383 8SJU 50046 CHEVRON USA LOST HILLS 1321 Acrolein 84 240 8SC 7417 EASTERN MUNICIPAL WATER4952 Acrolein 83 238 8SJU 50049 CHEVRON WARREN GP 1321 Acrolein 80 228 7SB 1063 VENOCO - ELLWOOD 1311 Acrolein 79 225 7SJU 50140 M.H. WHITTIER, CORPORAT 1311 H2S 17392 298 7IMP 49 J.J. ELMORE 4911 Arsenic 77 432 440 7NS 10006026 SANTA ROSA GEOTHERMAL C4961 H2S 17025 292 7SJU 50002 ARCO OIL AND GAS COMPA 1311 Arsenic 76 427 435 7SC 94967 MESA CONSOLIDATED WATER4941 Acrolein 75 215 7NS 10006021 SONOMA POWER PLANT 4911 H2S Y 16500 283 7IMP 44 VULCAN GEOTHERMAL 4911 Ammonia 1228868 1,052 7BA 16 CONOCOPHILLIPS - SAN FR 2911 Formaldeh 35483 362 2,025 6SJU 40042 CITY OF FRESNO, PUBLIC 4952 H2S 15800 271 6SLO 24 CAL POLY STATE U 9223 Acrolein Y 71 203 6SJU 50303 CHEVRON U.S.A. PRODUCTI 1311 Acrolein 70 200 6SC 9961 RIVERSIDE CITY, WATER Q 4941 Acrolein 70 200 6MOJ 104801880 RELIANT ENERGY COOLWATE4911 Acrolein 70 200 6SB 4632 PT. PEDERNALES/LOMPOC O1311 Acrolein 69 198 6SB 1708 CITY OF LOMPOC - WWT PL 4952 Acrolein Y 69 198 6SB 1510 GATO CORPORATION 1311 Acrolein 68 194 6SC 94999 THE GAGE CANAL COMPAN 4941 Acrolein 68 194 6MOJ 1500535 PG&E HINKLEY COMPRESSO4922 Acrolein 65 185 6VEN 33 LA CONCHITA OIL & GAS PL 1311 Acrolein Y 64 184 6SB 8001 PACIFIC OPERATORS - CARP1311 Acrolein 64 184 6SC 74396 CITY OF CERRITOS - WATER 4941 Acrolein 62 176 6IMP 72 SALTON SEA POWER GEN/UN4911 Ammonia 1036669 888 6SD 221 USMC BASE MARINE GROUN9711 Acrolein Y 61 176 6SAC 194 SACRAMENTO POWER AUTH4931 Acrolein Y 61 175 6BA 12626 VALERO REFINING COMPANY2911 H2S 13255 227 5SJU 50047 CHEVRON USA 17Z NA GAS 1321 Acrolein 60 171 5SC 8547 QUEMETCO INC 3341 Arsenic 60 334 340 5SJU 50282 VICTORY OIL COMPANY 1311 H2S 13052 223 5SJU 20929 PACIFIC ENERGY 4911 Acrolein 57 161 5SC 800363 CONOCOPHILLIPS COMPAN 2911 Ammonia 930665 797 5SC 800089 EXXONMOBIL OIL CORPORA 2911 Ammonia 920298 788 5SJU 257 CHEVRON USA INC. 1311 Formaldeh 26531 271 1,514 5MOJ 11800001 MITSUBISHI CEMENT 2005 3241 Acrolein 53 152 5BA 778 SAN JOSE/SANTA CLARA W 4952 H2S 11531 197 5SC 100844 MEDALLION CALIFORNIA PR 1311 Acrolein 52 148 5KER 572 RAND MINING COMPANY 1041 HCN 92124 1,753 5SC 119133 EOP - 10960 WILSHIRE LLC 8742 Acrolein 51 146 5

2005


KER 21 NATIONAL CEMENT CO 3241 Formaldeh Y 25320 258 1,445 5LAK 50 CALPINE - WEST FORD FLAT 4911 H2S Y 11200 192 5BA 13289 LOS ESTEROS CRITICAL EN 4911 Formaldeh 25016 255 1,428 5SJU 40139 J.R. SIMPLOT COMPANY 2819 Ammonia 838549 718 4SC 70296 EASTERN MUNICIPAL WATER4941 Acrolein 49 139 4SC 17301 ORANGE COUNTY SANITATIO4952 Formaldeh 24155 246 1,379 4SB 1482 EXXON - SYU PROJECT 1311 Acrolein Y 46 131 4SC 52886 GARDEN GROVE CITY, PUB. 4941 Acrolein 46 130 4SB 4640 SMRC/UNION SUGAR 2911 Acrolein 45 130 4SAC 195 SACRAMENTO COGENERATI4931 Acrolein Y 45 128 4SHA 59 FAWNDALE ROCK & ASPHALT2951 Arsenic 45 252 256 4SC 95000 THE GAGE CANAL COMPAN 4941 Acrolein 45 128 4BA 778 SAN JOSE/SANTA CLARA W 4952 Ammonia 752053 644 4NS 10006020 NCPA UNIT 4 4911 Ammonia Y 749090 641 4VEN 445 CAMARILLO SANITARY DIST 4952 H2S 9674 166 4MBU 577 DUKE ENERGY MOSS LANDI 4911 Acrolein 43 123 4SJU 50256 TEXACO - BAKERSFIELD DIV 1311 H2S 9411 161 4NS 10006028 NORTHERN CALIFORNIA PO 4961 H2S 9383 161 4SC 15748 CERRITOS CITY, WATER DIV 4941 Acrolein 42 121 4SC 5973 SO CAL GAS CO 4923 Formaldeh 20895 213 1,193 4SC 50418 ORANGE COUNTY, IWMD( OL4953 Acrolein 42 120 4IMP 51 J.M. LEATHERS 4911 Ammonia 706075 605 4SB 8702 ZACA FIELD 1311 Acrolein 42 119 4SC 53733 HUNTINGTON BEACH CITY, 9511 Acrolein 41 118 4SJU 50140 M.H. WHITTIER, CORPORAT 1311 Acrolein 41 117 4SC 94998 THE GAGE CANAL COMPAN 4941 Acrolein 41 116 4SC 101656 AIR PRODUCTS AND CHEMICA2813 Acrolein 41 116 4SC 1179 INLAND EMPIRE UTL AGEN, 4959 Acrolein 41 116 4SC 143523 ROBINSON CALF RANCH 241 Ammonia 677025 580 4SB 2638 PURISIMA HILLS LLC - BLAI 1311 Acrolein 40 114 4IMP 47 NEW CHARLESTON POWER L4911 Ammonia 674286 577 4SJU 1130 CHEVRON U S A INC 1311 Acrolein 40 113 4AV 102301816 NORTHROP GRUMMAN 3721 Acrolein 40 113 4MOJ 1500039 PG&E TOPOCK COMPRESSO4922 Acrolein 40 113 4BA 11661 RHODIA INC 2819 Sulfuric Ac 24840 4,253 4MOJ 3100068 SOUTHERN CALIFORNIA GA 4923 Acrolein 39 112 4SC 52883 GARDEN GROVE CITY, WES 4941 Acrolein 39 111 4SJU 247 MOBIL EXPLORATION AND 1311 Formaldeh 19244 196 1,098 4BA 41 OWENS CORNING INSULATI 3296 Formaldeh 19179 196 1,095 3SAC 106 REGIONAL SANITATION DIST4952 H2S 8567 147 3LAK 230 CALPINE UNIT 13: POWER/S 4911 Ammonia Y 642000 550 3SLO 13 CONOCO PHILLIPS SANTA M 2911 Nickel Y 1203 532 4,120 3SC 138097 DCOR LLC 1311 Acrolein 38 107 3SC 19159 EASTERN MUNICIPAL WATER4952 Acrolein 37 107 3SB 8675 SMV EAST 1311 Acrolein 37 106 3SC 45489 ADVANCED CARDIOVASCUL 3845 Acrolein 37 105 3SJU 2133 REFINERIES SERVICE 1382 Acrolein 37 105 3SJU 50997 MOBIL 1311 Acrolein 36 101 3SC 800181 CALIFORNIA PORTLAND CEM3241 Formaldeh 17143 175 979 3AV 122802129 LANCASTER LANDFILL AND 9511 Arsenic 34 191 194 3SJU 257 CHEVRON USA INC. 1311 Arsenic 34 190 193 3COL 43 PIRELLI CABLE CORPORATI 3643 Copper 17300 1,234 3LAK 240 CALPINE UNIT 16: POWER/S 4911 H2S Y 7204 123 3SJU 50177 NAVAL PETROLEUM RESERV1311 Formaldeh 15954 163 911 3

2005


NSI 52 SIERRA AGGREGATES 1442 Arsenic 32 181 184 3FR 9999 BEALE AFB FACILITY WIDE 9711 Arsenic Y 32 179 183 3MOJ 100005 CEMEX QUARRY 3241 Mercury 303 576 3BA 568 SAN FRANCISCO SOUTH EA 4952 H2S 7068 121 3MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Nickel Y 990 438 3,392 3LAK 240 CALPINE UNIT 16: POWER/S 4911 Ammonia Y 526120 450 3NS 10006026 SANTA ROSA GEOTHERMAL C4961 Arsenic 31 174 177 3MOJ 1500535 PG&E HINKLEY COMPRESSO4922 Formaldeh 15251 156 870 3SC 800128 SO CAL GAS CO (EIS USE) 4922 Formaldeh 14818 151 846 3SJU 20890 NEWARK SIERRA PAPERBOA2621 Nickel 906 400 3,103 3IMP 50 A. W. HOCH 4911 Ammonia 477456 409 3MBU 602 EXXONMOBIL CORP 4612 H2S 5886 101 2SD 2631 KYOCERA AMERICA INC 3469 Formaldeh 13155 134 751 2SJU 50234 SHELL WESTERN E&P INC. 1311 Mercury 252 479 2NS 10006028 NORTHERN CALIFORNIA PO 4961 Nickel 830 367 2,843 2MOJ 100005 CEMEX QUARRY 3241 Arsenic 26 146 149 2NS 10006020 NCPA UNIT 4 4911 Mercury Y 236 448 2SJU 50308 TEXACO USA, VENTURA PR 1311 Formaldeh 12288 125 701 2NS 10006025 UNOCAL GEOTHERMAL DIVI 4961 Arsenic 24 135 138 2SC 121737 MOUNTAINVIEW POWER CO 4911 Formaldeh 11814 120 674 2SJU 299 UNOCAL OIL & GAS DIVISIO 1311 Arsenic 24 134 136 2SJU 40152 MADERA GLASS COMPANY 3221 Arsenic 24 132 135 2SJU 40161 PG&E KETTLEMAN COMPRES4931 Formaldeh Y 11440 117 653 2NS 10006024 AIDLIN GEOTHERMAL PROJ 4911 Mercury Y 218 415 2SJU 20921 OWENS-BROCKWAY GLASS 3221 Arsenic 23 129 131 2KER 20 LEHIGH SOUTHWEST CEMEN3241 Arsenic Y 23 126 129 2BA 14628 TESORO REFINING AND MA 2911 Formaldeh 10871 111 620 2SC 800193 LA CITY, DWP VALLEY GEN 4911 Formaldeh 10866 111 620 2GBU 3050309 COSO OPERATING COMPANY4961 Arsenic Y 22 123 125 2SC 800089 EXXONMOBIL OIL CORPORA 2911 Nickel 690 305 2,364 2SC 800074 LA CITY, DWP HAYNES GEN 4911 Formaldeh 10774 110 615 2SJU 40042 CITY OF FRESNO, PUBLIC 4952 Ammonia 363047 311 2SD 540 CABRILLO POWER II LLC MI 4911 Arsenic Y 21 120 122 2IMP 53 PLANT EAST MESA PEM UNIT4911 Ammonia 359249 308 2COL 49 PG&E DELEVAN COMPRESSO4923 Formaldeh Y 10547 108 602 2SC 14437 SAN ANTONIO COMMUNITY 8062 Formaldeh 9933 101 567 2IMP 52 ORMESA 1H 4911 Ammonia 333990 286 2BA 17 HANSON PERMANENTE CEM3241 Mercury 179 341 2MOJ 1500039 PG&E TOPOCK COMPRESSO4922 Formaldeh 9328 95 532 2SC 131003 BP WEST COAST PROD.LLC 2911 Ammonia 316309 271 2SJU 477 PILKINGTON NORTH AMERIC3211 Ammonia Y 314541 269 2SB 1735 CELITE CORPORATION 3295 Ammonia 313838 269 2SC 800370 EQUILON ENTER., LLC, SHEL2911 Formaldeh 9206 94 525 2BA 10 CHEVRON PRODUCTS COM 2911 Ammonia 312057 267 2MBU 1186 CEMEX - CEMENT PLANT 3241 Mercury 175 333 2BA 41 OWENS CORNING INSULATI 3296 Ammonia 309602 265 2SC 52517 REXAM PLC, REXAM BEVER 3411 Formaldeh 9085 93 519 2MBU 926 MONTEREY REGION WASTE 4953 Formaldeh 8775 90 501 2SD 89296 SD METRO PUMPING STATIO4952 Formaldeh Y 8672 88 495 2BA 51 UNITED AIRLINES, SF MAIN 4581 Formaldeh 8617 88 492 2BA 22 CONOCO PHILLIPS REFININ 2999 Mercury 163 311 2MOJ 11800001 MITSUBISHI CEMENT 2005 3241 Mercury 161 306 2SJU 50037 CHEVRON BITTERWATER PU4612 Nickel 536 237 1,835 2BA 16199 GAYLORD CONTAINER COR 6798 Formaldeh 8353 85 477 2

2005


MOJ 100005 CEMEX QUARRY 3241 HCl 186224 3,543 2MBU 1482 UCSC 8221 Formaldeh 8158 83 466 1SC 145215 RAMONA FARMS 241 Ammonia 268376 230 1NS 10006014 GEYSERS POWER CO UNIT 4911 Ammonia Y 266000 228 1IMP 15 IMPERIAL IRRIGATION DISTR4911 Nickel Y 498 220 1,706 1SC 800370 EQUILON ENTER., LLC, SHEL2911 Ammonia 263989 226 1LAS 15 H.L. POWER COMPANY 4931 Ammonia Y 261906 224 1SAC 106 REGIONAL SANITATION DIST4952 Ammonia 259762 222 1TUO 1 SIERRA PACIFIC IND. STAN 2421 Formaldeh Y 7629 78 435 1BA 12626 VALERO REFINING COMPANY2911 Ammonia 256884 220 1BA 621 CITY OF SANTA CLARA, SILI 4941 Formaldeh 7487 76 427 1NS 10006018 NCPA UNIT 2 4911 Nickel Y 475 210 1,625 1SAC 196 KIEFER LANDFILL 4953 Formaldeh Y 7429 76 424 1SHA 51 BURNEY FOREST PRODUCT 2421 Formaldeh 7310 75 417 1SC 800074 LA CITY, DWP HAYNES GEN 4911 Ammonia 245377 210 1SC 18452 UNIVERSITY OF CALIFORNIA8221 Formaldeh 7062 72 403 1IMP 75 IMPERIAL RESOURCE RECO 4911 HCl 157334 2,993 1SC 800030 CHEVRON PRODUCTS CO. 2911 Ammonia 239732 205 1IMP 54 AMERICAN GIRL MINE 1041 HCN 25053 477 1SC 4242 SAN DIEGO GAS & ELECTRI 4922 Formaldeh 6906 70 394 1BA 8664 CROCKETT COGENERATION, 4931 Ammonia 234676 201 1BA 12626 VALERO REFINING COMPANY2911 Nickel 438 194 1,500 1SLO 13 CONOCO PHILLIPS SANTA M 2911 HCl Y 153242 2,916 1SC 55449 BKK CORPORATION, LANDFIL4953 HCl Y 152336 2,898 1SAC 194 SACRAMENTO POWER AUTH4931 Formaldeh Y 6812 69 389 1SC 131003 BP WEST COAST PROD.LLC 2911 Nickel 422 187 1,446 1MOJ 8400589 US ARMY NATIONAL TRAININ9711 Toluene 2598693 1,483 1SHA 51 BURNEY FOREST PRODUCT 2421 Ammonia 223000 191 1MBU 1058 PACIFIC RECOVERY CORP 4931 Formaldeh 6537 67 373 1NS 10006006 GEYSERS POWER CO UNIT 4911 Mercury Y 125 238 1NS 10006007 GEYSERS POWER CO UNIT 4911 Mercury Y 125 238 1IMP 71 UNITS 1 AND 2 POWER PLA 4911 Ammonia 218772 187 1SC 134943 ALCOA GLOBAL FASTENERS,3452 Nickel 406 179 1,390 1COL 55 WADHAM ENERGY LTD PAR 4931 Formaldeh Y 6136 63 350 1GLE 43 MOBIL EXPL'N & PROD'G U.S 1311 Formaldeh 6001 61 343 1SC 126964 EDWARDS LIFESCIENCES L 3842 Formaldeh 5991 61 342 1SC 800327 GLENDALE CITY, GLENDAL 4931 Nickel 381 168 1,304 1SC 131003 BP WEST COAST PROD.LLC 2911 Formaldeh 5944 61 339 1VEN 33 LA CONCHITA OIL & GAS PL 1311 Formaldeh Y 5814 59 332 1BA 11866 LOS MEDANOS ENERGY CE 4911 Formaldeh 5784 59 330 1SC 145258 SYANN DAIRY, MARK VAND 241 Ammonia 196337 168 1SJU 40224 SHELL WESTERN E & P INC. 1311 Nickel 365 162 1,251 1BA 541 PACIFIC GAS & ELECTRIC C 4922 Formaldeh 5705 58 326 1SC 800240 TIN, INC. TEMPLE-INLAND, D 2631 Formaldeh 5689 58 325 1MOD 2501 TIONESTA COMPRESSOR ST4932 Formaldeh Y 5640 58 322 1MBU 1186 CEMEX - CEMENT PLANT 3241 Formaldeh 5607 57 320 1SC 144826 PASTIME LAKES DAIRY 241 Ammonia 188225 161 1NS 10006010 GEYSERS POWER CO UNIT 4911 Mercury Y 104 198 1SJU 40214 SHELL OIL - KETTLEMAN PU 4612 Nickel 340 150 1,164 1SJU 50229 SHELL OIL WASCO PUMP ST 4612 Nickel 340 150 1,164 1SJU 50002 ARCO OIL AND GAS COMPA 1311 Formaldeh 5276 54 301 1SC 19194 EPPINK OF CALIFORNIA 2431 Formaldeh 5144 52 294 1SC 3671 EISENHOWER MEDICAL CEN8062 Formaldeh 5140 52 293 1SD 73 CABRILLO POWER I LLC EN 4911 Nickel Y 318 141 1,089 1

2005


SAC 195 SACRAMENTO COGENERATI4931 Formaldeh Y 4973 51 284 1SC 145036 BOOTSMA CALIF RANCH, IK 279 Ammonia 167947 144 1SC 800089 EXXONMOBIL OIL CORPORA 2911 Formaldeh 4914 50 280 1IMP 46 SANTA FE PACIFIC GOLD CO1041 HCN Y 17705 337 1NS 10006006 GEYSERS POWER CO UNIT 4911 Ammonia Y 164000 140 1SB 1482 EXXON - SYU PROJECT 1311 Formaldeh Y 4786 49 273 1SJU 10316 DEL MONTE USA PLANT #1 2033 Nickel 304 134 1,041 1BA 2478 UCSF/PARNASSUS 8062 Formaldeh 4712 48 269 1SJU 257 CHEVRON USA INC. 1311 Mercury 90 171 1SJU 50046 CHEVRON USA LOST HILLS 1321 Formaldeh 4680 48 267 1BA 16 CONOCOPHILLIPS - SAN FR 2911 Mercury 89 169 1SJU 20653 J.R. SIMPLOT COMPANY 2873 HF 11850 145 1BA 3011 IPT SRI COGENERATION INC 4931 Formaldeh 4590 47 262 1SJU 50002 ARCO OIL AND GAS COMPA 1311 Nickel 292 129 999 1SHA 2 LEHIGH SOUTHWEST CEMEN3241 Mercury 87 166 1SC 145095 CBJ DAIRY 241 Ammonia 152785 131 1IMP 43 ORMAT NEVADA, INC 4911 Ammonia Y 152770 131 1BA 22 CONOCO PHILLIPS REFININ 2999 HCl 99765 1,898 1NSI 3 SIERRA PACIFIC INDUSTRIE 2421 Formaldeh Y 4442 45 254 1SD 73 CABRILLO POWER I LLC EN 4911 Formaldeh Y 4421 45 252 1BA 591 EAST BAY MUNICIPAL UTILIT4952 Formaldeh 4412 45 252 1LAS 11 CALIF CORRECTIONAL CEN 9223 Nickel Y 279 123 956 1KER 20 LEHIGH SOUTHWEST CEMEN3241 Mercury Y 84 159 1SC 121737 MOUNTAINVIEW POWER CO 4911 Ammonia 148452 127 1SC 4477 SO CAL EDISON CO 4911 Formaldeh 4360 44 249 1MOJ 100005 CEMEX QUARRY 3241 Formaldeh 4315 44 246 1SHA 2 LEHIGH SOUTHWEST CEMEN3241 HCl 93900 1,787 1SC 45448 GAS RECOVERY SYST LLC 4911 Nickel 266 118 911 1NS 10006021 SONOMA POWER PLANT 4911 Ammonia Y 140000 120 1BA 778 SAN JOSE/SANTA CLARA W 4952 Formaldeh 4099 42 234 1SC 8547 QUEMETCO INC 3341 Formaldeh 4087 42 233 1MBU 1347 SOLEDAD ENERGY PARTNE 4911 Formaldeh 4030 41 230 1SC 800193 LA CITY, DWP VALLEY GEN 4911 Ammonia 136542 117 1MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Formaldeh Y 4011 41 229 1SC 145411 GERBEN HETTINGA/4-H CAL 241 Ammonia 135410 116 1SB 2667 BREITBURN ENERGY- ORCUT1311 Formaldeh N 3955 40 226 1SC 113873 MM WEST COVINA LLC 4911 Nickel 252 112 864 1NS 10006004 GEYSERS POWER CO UNIT 4911 Ammonia Y 134000 115 1NS 10006016 GEYSERS POWER CO UNIT 4911 Ammonia Y 134000 115 1NS 10006005 GEYSERS POWER CO UNIT 4911 Ammonia Y 134000 115 1NCU 37 EVERGREEN PULP, INC 2611 Formaldeh Y 3912 40 223 1SC 49111 SUNSHINE CANYON LANDFIL4953 Formaldeh 3818 39 218 1SC 145017 DYT DAIRY, ANDY DYT 241 Ammonia 128183 110 1NS 10006011 GEYSERS POWER CO UNIT 4911 Ammonia Y 128000 110 1SC 145209 MORENO VALLEY DAIRY 241 Ammonia 127506 109 1SC 145143 EAGLE LIVESTOCK INC 241 Ammonia 127500 109 1SC 145347 FRED DEBOER DAIRY 241 Ammonia 127500 109 1GBU 1 AMERICAN PERLITE COMPA 3295 Nickel Y 239 105 817 1VEN 41 AERA ENERGY LLC 1311 Formaldeh Y 3714 38 212 1SC 69646 ORANGE COUNTY, IWMD (B 4953 Formaldeh 3690 38 211 1SC 128243 BURBANK CITY,BURBANK W 4911 Formaldeh 3669 37 209 1MOJ 3100068 SOUTHERN CALIFORNIA GA 4923 Formaldeh 3660 37 209 1SJU 50147 MCFARLAND ENERGY, INC. 1311 Formaldeh 3649 37 208 1SC 145061 TADEMA CATTLE CO 241 Ammonia 124129 106 1

2005


NS 10006015 GEYSERS POWER CO UNIT 4911 Ammonia Y 124000 106 1SJU 50170 MONARCH COGENERATION 14931 Ammonia 123867 106 1SJU 232 NAVAL COMMUNICATION ST 9711 Nickel 232 103 795 1SJU 50142 MARATHON OIL S COLES LE 1321 Formaldeh 3610 37 206 1SC 145085 NORTHVIEW DAIRY 241 Ammonia 122530 105 1SHA 255 KNAUF FIBER GLASS GMBH 3296 Ammonia 121000 104 1MOJ 11800001 MITSUBISHI CEMENT 2005 3241 HCl 78900 1,501 1IMP 53 PLANT EAST MESA PEM UNIT4911 Benzene 48649 2,398 139 1SC 145193 HENRY JONGSMA AND SON 241 Ammonia 119159 102 1BA 16 CONOCOPHILLIPS - SAN FR 2911 Ammonia 118628 102 1SC 14502 VERNON CITY, LIGHT & PO 4911 Formaldeh 3467 35 198 1MOJ 104801880 RELIANT ENERGY COOLWATE4911 Formaldeh 3453 35 197 1SC 143973 MARVO HOLSTEINS 241 Ammonia 117351 100 1BA 907 CENTRAL CONTRA COSTA S 4952 Formaldeh 3433 35 196 1SB 8001 PACIFIC OPERATORS - CARP1311 Formaldeh 3375 34 193 1SC 9163 INLAND EMPIRE UTL AGEN, 4959 Formaldeh 3318 34 189 1SJU 21150 SIMPSON PAPER COMPANY 2521 Formaldeh Y 3316 34 189 1BA 12626 VALERO REFINING COMPANY2911 Formaldeh 3290 34 188 1BA 14628 TESORO REFINING AND MA 2911 Sulfuric Ac 4175 715 1NSI 1 SIERRA PACIFIC INDUSTRIE 2421 Formaldeh Y 3196 33 182 1BA 2371 USS-POSCO INDUSTRIES 3312 Sulfuric Ac 4024 689 1SHA 18 SIERRA PACIFIC IND. - BUR 2421 Formaldeh 3100 32 177 1SC 56547 MARCEL ELECTRONICS 3672 Formaldeh 3089 32 176 1SC 800052 ARCO TERMINAL SERVICES 5171 Formaldeh 3058 31 175 1MBU 1015 OWL COMPANIES 7011 Formaldeh 2927 30 167 1SAC 1 AEROJET 3761 HCl Y 64347 1,224 1NCU 60 PACIFIC LUMBER COMPANY,2421 Formaldeh Y 2842 29 162 1SAC 112 GRAFIL INC 2221 HCN Y 10172 194 1SJU 15 WESTERN COTTON SERVICE2074 Nickel 179 79 612 1MOJ 900002 SEARLES VALLEY MINERAL 1474 Sulfuric Ac 3557 609 1BA 14628 TESORO REFINING AND MA 2911 Benzene 38160 1,881 109 1SJU 41 ANDERSON CLAYTON CORP/O2074 Nickel 174 77 596 0SC 15504 SCHLOSSER FORGE COMPA3463 Nickel 173 77 593 0SC 800030 CHEVRON PRODUCTS CO. 2911 Nickel 172 76 590 0SD 415 APPLIED ENERGY INC 4931 Formaldeh Y 2676 27 153 0SJU 50228 SHELL OIL MID PUMPING ST 4612 Nickel 170 75 582 0SC 119907 BERRY PETROLEUM COMPA 1311 Formaldeh 2661 27 152 0SJU 50234 SHELL WESTERN E&P INC. 1311 Formaldeh 2628 27 150 0SC 129497 THUMS LONG BEACH CO 4911 Formaldeh 2624 27 150 0SD 6974 RIDGEWOOD CALIFORNIA P 4931 Formaldeh 2553 26 146 0SC 800030 CHEVRON PRODUCTS CO. 2911 Formaldeh 2548 26 145 0MOJ 11800001 MITSUBISHI CEMENT 2005 3241 Formaldeh 2534 26 145 0MOJ 3100065 SOUTHERN CALIFORNIA GA 4922 Formaldeh 2516 26 144 0BA 8664 CROCKETT COGENERATION, 4931 Formaldeh 2506 26 143 0SC 50418 ORANGE COUNTY, IWMD( OL4953 Formaldeh 2496 25 142 0SB 5019 SO CAL GAS - LA GOLETA 4922 Formaldeh 2472 25 141 0SD 5270 APPLIED ENERGY INC 4931 Formaldeh 2449 25 140 0SJU 20921 OWENS-BROCKWAY GLASS 3221 HCl 53525 1,018 0BA 17 HANSON PERMANENTE CEM3241 Formaldeh 2396 24 137 0SJU 285 DIAMOND WALNUT GROWERS723 Propylene Y 78340 493 447 0SC 918 QUEEN OF THE VALLEY HOS8062 Formaldeh 2353 24 134 0SC 800370 EQUILON ENTER., LLC, SHEL2911 Nickel 150 66 514 0VEN 388 SENECA RESOURCES CORP 1311 Formaldeh Y 2349 24 134 0SC 1703 EASTERN MUNICIPAL WATER4952 Formaldeh 2331 24 133 0

2005


SC 1912 SADDLEBACK COMMUNITY C8221 Formaldeh 2312 24 132 0SC 800209 BKK CORP (EIS USE) 4953 Formaldeh 2273 23 130 0SC 800026 ULTRAMAR INC (NSR USE O 2911 Formaldeh 2211 23 126 0SJU 20387 DIAMOND WALNUT GROWERS5145 Methyl Bro Y 91400 3,130 0VEN 970 DOS CUADRAS OFFSHORE R1311 Formaldeh Y 2196 22 125 0NSI 52 SIERRA AGGREGATES 1442 Nickel 140 62 478 0BA 1634 NAPA STATE HOSPITAL 8063 Formaldeh 2188 22 125 0PLA 34 SIERRA PACIFIC INDUSTRIE 2421 Formaldeh 2184 22 125 0SD 309 SALK INSTITUTE 8733 Formaldeh 2180 22 124 0SJU 50303 CHEVRON U.S.A. PRODUCTI 1311 Formaldeh 2175 22 124 0SC 68042 CORONA ENERGY PARTNERS4931 Formaldeh 2158 22 123 0SHA 255 KNAUF FIBER GLASS GMBH 3296 Sulfuric Ac 2740 469 0BA 1605 CHEVRONTEXACO BUSINESS6552 Formaldeh 2142 22 122 0BA 6044 O L S ENERGY-AGNEWS 4931 Formaldeh 2138 22 122 0SC 139010 RIPON COGENERATION LLC 4911 Formaldeh 2124 22 121 0SHA 42 BURNEY MOUNTAIN POWER 4931 Formaldeh 2110 22 120 0BA 227 CRITERION CATALYSTS CO 2819 Nickel 134 59 460 0SD 251 PACIFIC GAS TURBINE CENT3724 Formaldeh 2083 21 119 0SHA 43 WHEELABRATOR SHASTA E.C4931 Formaldeh 2069 21 118 0SC 9053 TRIGEN- LA ENERGY CORP 4961 Formaldeh 2068 21 118 0IMP 15 IMPERIAL IRRIGATION DISTR4911 Formaldeh Y 2056 21 117 0SB 2658 CAT CANYON 1311 Formaldeh N 2054 21 117 0SC 800051 ARCO TERMINAL SERVICES 5171 Formaldeh 2049 21 117 0SJU 50035 CHAPARRAL PETROLEUM IN 1311 Toluene 806120 460 0SC 43436 TST, INC. 3341 Formaldeh 2045 21 117 0PLA 28 SIERRAPINE LTD - ROCKLIN 2493 Formaldeh 2017 21 115 0SD 118 CP KELCO 2099 Formaldeh Y 2010 21 115 0SC 119219 REPUBLIC SERV OF CALIF L 4953 Formaldeh 1928 20 110 0BA 23 GENERAL CHEMICAL WEST 2819 Sulfuric Ac 2452 420 0SC 112853 NP COGEN INC 4911 Formaldeh 1915 20 109 0SJU 50113 HIGH SIERRA LIMITED 4911 Formaldeh 1870 19 107 0SJU 11053 TRI-VALLEY GROWERS PLAN2033 Nickel 117 52 401 0SC 800286 ARCO TERMINAL SERVICES 5171 Formaldeh 1828 19 104 0SJU 179 TRIANGLE PACIFIC CORP. 2434 Formaldeh 1802 18 103 0VEN 4 VINTAGE PETROLEUM INC. 1311 Formaldeh Y 1798 18 103 0SD 8469 GOAL LINE LP 4931 Formaldeh 1792 18 102 0SD 4824 MCAS MIRAMAR 9711 Formaldeh Y 1784 18 102 0BA 10 CHEVRON PRODUCTS COM 2911 Formaldeh 1766 18 101 0LAS 16 MT. LASSEN POWER 4931 Formaldeh Y 1764 18 101 0IMP 43 ORMAT NEVADA, INC 4911 Benzene Y 23680 1,167 68 0SJU 50251 TEXACO REFINING & MARKE9411 Benzene Y 22438 1,106 64 0SJU 40165 PPG INDUSTRIES INC. 3211 HCl Y 34507 657 0NSI 3 SIERRA PACIFIC INDUSTRIE 2421 Nickel Y 96 42 328 0SJU 50029 CALIFORNIA CORRECTIONAL9223 Chlorine 3324 2,846 0MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Copper Y 1502 107 0SJU 50182 OXY USA INC. 1311 Nickel 90 40 307 0BA 194 PCC STRUCTURALS - SAN 3324 Nickel 87 39 299 0SAC 194 SACRAMENTO POWER AUTH4931 Sulfuric Ac Y 1726 296 0MOJ 5400246 AEROCHEM INC 3728 HCl Y 29586 563 0COL 54 ARKOMA PRODUCTIONS CO 1381 Chlorine 2956 2,530 0PLA 44 RIO-BRAVO 4911 HCl 28600 544 0SJU 285 DIAMOND WALNUT GROWERS723 Methyl Bro Y 53100 1,818 0SJU 40128 J.G. BOSWELL OIL MILL 723 Nickel 81 36 279 0COL 34 COASTAL OIL & GAS CORP. 1381 Chlorine 2839 2,431 0

2005


BA 1438 NEW UNITED MOTOR MANU 3711 EGBE 185134 1,585 0TUO 1 SIERRA PACIFIC IND. STAN 2421 Nickel Y 79 35 271 0SB 1661 SISQUOC SAND, ROCK AND 2951 Nickel 78 34 267 0FR 19002 CUSTOM CHROME & BUMPE 3471 Sulfuric Ac 1530 262 0SJU 239 TRACY PUMP STATION 4612 Nickel 75 33 256 0BA 646 SILICONIX, INCORPORATED 3674 Sulfuric Ac 1471 252 0SC 18188 PLASMA TECHNOLOGY INC 3479 Nickel 72 32 246 0FR 18 HARTER PIK'DRITE, INC. 2033 Chlorine 2500 2,140 0COL 36 P G & E RESOURCES COMP 1381 Chlorine 2330 1,995 0FR 22 P G & E RESOURCES 1311 Chlorine 2287 1,958 0LAS 16 MT. LASSEN POWER 4931 Nickel Y 65 29 222 0NCU 60 PACIFIC LUMBER COMPANY,2421 Nickel Y 62 28 213 0SHA 59 FAWNDALE ROCK & ASPHALT2951 Nickel 62 27 211 0NSI 1 SIERRA PACIFIC INDUSTRIE 2421 Nickel Y 61 27 209 0SC 22379 CHROMALLOY LOS ANGELE 7699 Nickel 59 26 201 0SC 11192 HI-SHEAR CORPORATION 3452 Nickel 57 25 195 0SB 1536 GRANITE - BUELLTON 2951 Nickel 56 25 192 0SJU 50247 TANNEHILL OIL COMPANY 1311 Nickel Y 56 25 192 0SD 963 DREW FORD 7532 Sulfuric Ac 1112 190 0BA 31 DOW CHEMICAL COMPANY 2879 Chlorine 1927 1,649 0TUO 12 PACIFIC-ULTRAPOWER CHIN4911 Nickel Y 52 23 177 0SD 8201 CA PLATING 3471 Nickel Y 51 23 175 0FR 19002 CUSTOM CHROME & BUMPE 3471 Nickel 50 22 171 0COL 201 OXY USA, INC. 1381 Chlorine 1717 1,470 0MOJ 8600591 MAGTFTC MCAGCC TWENTY9711 Nickel 48 21 163 0BA 16 CONOCOPHILLIPS - SAN FR 2911 Nickel 47 21 160 0SB 4421 UNION ASPHALT 2951 Nickel 45 20 156 0NCU 96 FAIRHAVEN POWER COMPA 4911 Nickel Y 44 19 150 0MBU 1347 SOLEDAD ENERGY PARTNE 4911 HCl 15242 290 0SC 800026 ULTRAMAR INC (NSR USE O 2911 Nickel 43 19 147 0SJU 228 DDRW TRACY SITE 9711 Chlorine 1460 1,250 0COL 33 TRITON OIL & GAS CORP. 1381 Chlorine 1459 1,250 0SD 6129 APPLIED MICRO CIRCUITS 3674 Sulfuric Ac 829 142 0SB 1735 CELITE CORPORATION 3295 Nickel 41 18 140 0SJU 50242 STOCKDALE OIL & GAS 1311 Nickel 41 18 140 0VEN 244 ARCTURUS MANUFACTURIN 3463 Nickel N 40 18 137 0SD 19 NATL STEEL & SHIPBUILDI 3731 Nickel Y 40 18 136 0VEN 22 HALACO ENGINEERING CO 3341 Nickel Y 38 17 132 0SC 131249 BP WEST COAST PRODUCTS2999 Nickel 38 17 129 0SJU 247 MOBIL EXPLORATION AND 1311 HCl 12772 243 0KER 28 U.S. BORAX 1474 Nickel Y 36 16 125 0MOJ 8800567 NAVAL AIR WEAPONS STATI 9711 HCl 12714 242 0SJU 40123 INDUSTRIAL ASPHALT 2951 Chlorine 1260 1,079 0KER 20 LEHIGH SOUTHWEST CEMEN3241 HCl Y 12440 237 0NS 10006026 SANTA ROSA GEOTHERMAL C4961 Nickel 35 15 120 0SAC 200 GRANITE CONSTRUCTION C 2951 Nickel Y 35 15 120 0BUT 1005 OROVILLE HOSPITAL 8062 HCl 11900 226 0BA 703 PACIFIC STEEL CASTING CO 3325 Nickel 33 15 114 0SC 23837 ACME CASTINGS INC 3325 Nickel 32 14 108 0SC 44577 LONG BEACH CITY, SERRF 9199 Nickel 31 14 107 0IMP 54 AMERICAN GIRL MINE 1041 Nickel 31 14 106 0SHA 51 BURNEY FOREST PRODUCT 2421 Nickel 31 14 106 0SD 4845 USN NAV STA 1 SCE 9711 Nickel Y 30 13 103 0KER 572 RAND MINING COMPANY 1041 Nickel 30 13 102 0

2005


SD 96387 MINNESOTA METHANE SAN D4931 HCl 10010 190 0BA 2371 USS-POSCO INDUSTRIES 3312 HCl 8196 156 0MOJ 5400246 AEROCHEM INC 3728 Perc Y 74598 748 365 0ED 27 SOUTH TAHOE PUB. UTILITY 4952 Chlorine Y 778 666 0PLA 35 NEC ELECTRONICS INC 3674 Chlorine 654 560 0COL 128 THE TERMO CO 1381 Chlorine Y 595 509 0SJU 40115 GWF POWER SYSTEMS COMP4911 HCl 5508 105 0COL 50 MCGILL AND SHEPHERD 1381 Chlorine 540 462 0BA 148 BALL METAL BEVERAGE CO 3411 EGBE 34513 295 0KER 21 NATIONAL CEMENT CO 3241 EpichlorohyY 3001 117 171 0SJU 534 DOLE DRIED FRUIT & NUT C 2068 Methyl Bro 8925 306 0SJU 1330 GREIF BROS. CORPORATIO 3411 EGBE Y 30854 264 0MOJ 8600591 MAGTFTC MCAGCC TWENTY9711 Chlorine 442 378 0FR 16004 SUNSWEET GROWERS INC. 723 Methyl Bro Y 8070 276 0COL 22 MOBIL EXPLORATION & PR 1381 Chlorine 370 317 0MOJ 19901418 HELENDALE WASTEWATER 4952 Chlorine 360 308 0SJU 423 R-CLEANERS 7216 Perc 30861 310 151 0SC 38971 RICOH ELECTRONICS INC 3579 Perc Y 29820 299 146 0SJU 3076 SNOW CLEANERS INC 7216 Perc 29592 297 145 0NSI 3 SIERRA PACIFIC INDUSTRIE 2421 Chlorine Y 298 255 0SJU 40139 J.R. SIMPLOT COMPANY 2819 Chlorine 285 244 0NSI 1 SIERRA PACIFIC INDUSTRIE 2421 Chlorine Y 266 228 0SJU 50069 DEXZEL, INC. 4911 Chlorine 244 209 0MOJ 8400589 US ARMY NATIONAL TRAININ9711 Chlorine 241 206 0SJU 20777 LODI METAL TECH INC 2542 EGBE 14804 127 0SLO 13 CONOCO PHILLIPS SANTA M 2911 Chlorine Y 219 188 0SHA 42 BURNEY MOUNTAIN POWER 4931 Chlorine 211 181 0SAC 201 SILGAN CAN COMPANY 3411 EGBE Y 13669 117 0SJU 20653 J.R. SIMPLOT COMPANY 2873 Chlorine 200 171 0SC 124619 IMPRESS USA INC 3411 EGBE 12775 109 0COL 57 ABA ENERGY CORPORATIO 1311 Chlorine 153 131 0SJU 50243 STYROTEK INC. 2821 Chlorine 149 127 0MOJ 9600500 BARSTOW, CITY OF - WWT 4952 Chlorine Y 141 121 0SJU 50177 NAVAL PETROLEUM RESERV1311 Chlorine 141 121 0SJU 40017 CALIF STATE UNIVERSITY, 8221 Chlorine 129 110 0COL 114 PETSEC(AA PRODUCTION SE1311 Chlorine 129 110 0SHA 18 SIERRA PACIFIC IND. - BUR 2421 Chlorine 122 104 0BA 12115 SPECTRUM LABEL CORPOR 2759 Acrylic aci 1403 240 0ED 7 SIERRA PACIFIC INDUSTRIE 2421 Manganes Y 4698 4,022NS 10006025 UNOCAL GEOTHERMAL DIVI 4961 Phosphoru 1174 2,872GBU 1 AMERICAN PERLITE COMPA 3295 Manganes Y 3070 2,628SJU 247 MOBIL EXPLORATION AND 1311 Phosphoru 1038 2,538IMP 47 NEW CHARLESTON POWER L4911 Phosphoru 926 2,265SC 131003 BP WEST COAST PROD.LLC 2911 Beryllium 86 350 2,097NCU 60 PACIFIC LUMBER COMPANY,2421 Manganes Y 2207 1,890TUO 1 SIERRA PACIFIC IND. STAN 2421 Manganes Y 2147 1,839SHA 44 DICALITE MINERALS CORPO 1499 Manganes 2130 1,824SJU 257 CHEVRON USA INC. 1311 Phosphoru 733 1,794SLO 13 CONOCO PHILLIPS SANTA M 2911 Manganes Y 1917 1,641NCU 96 FAIRHAVEN POWER COMPA 4911 Manganes Y 1548 1,326SC 800327 GLENDALE CITY, GLENDAL 4931 Manganes 1255 1,074KER 9 CALIFORNIA PORTLAND CEM3241 Beryllium Y 40 164 983SJU 1196 SUNMAID GROWERS OF CAL 179 Phosphine 4269 914GBU 3050309 COSO OPERATING COMPANY4961 Cadmium Y 106 754 905

2005


SJU 40125 INDUSTRIAL ASPHALT 2951 Manganes 1049 898NSI 15 COLLINS PINE CO 2421 Manganes Y 1013 867KER 9 CALIFORNIA PORTLAND CEM3241 Manganes Y 996 853YS 5011 CALIFORNIA STATE PRISON 9223 Phosphoric 34799 851SJU 299 UNOCAL OIL & GAS DIVISIO 1311 Phosphoru 342 836SHA 39 SIERRA PACIFIC IND. - SHAS 2421 Manganes 936 801MOJ 8400589 US ARMY NATIONAL TRAININ9711 Manganes 933 799MOJ 100005 CEMEX QUARRY 3241 Manganes 932 798KER 28 U.S. BORAX 1474 Manganes Y 926 793SC 113873 MM WEST COVINA LLC 4911 Manganes 832 712TUO 12 PACIFIC-ULTRAPOWER CHIN4911 Manganes Y 815 698VEN 137 WESTERN FARM SERVICE 7389 Phosphoru 268 656SB 1735 CELITE CORPORATION 3295 Acetaldehy 33477 154 637MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Beryllium Y 25 101 608SC 800089 EXXONMOBIL OIL CORPORA 2911 Cadmium 70 496 595IMP 65 PLANT EAST MESA UNIT 1 4911 Phosphoru Y 239 584SC 800181 CALIFORNIA PORTLAND CEM3241 Cadmium 63 450 539SC 131003 BP WEST COAST PROD.LLC 2911 Cadmium 62 444 533SJU 40032 CHEVRON - COALINGA/KET 1311 Phosphoru 213 522LAS 16 MT. LASSEN POWER 4931 Manganes Y 575 492BA 11693 FOAMEX, L P 3086 TolueneDii 196 4 481SC 120162 MICHAEL D. KELLEY 7532 Cadmium 55 392 470BA 62 AMERICAN BRASS & IRON 3321 Manganes 510 437SJU 20890 NEWARK SIERRA PAPERBOA2621 Phosphoru 176 432SAC 67 BLUE DIAMOND GROWERS 2099 Phosphine 1878 402SC 800149 US BORAX INC 3299 Cadmium 43 307 369SC 4344 KUSTOM FIT MFG CO 2531 T-2,4-diiso 147 3 359SJU 20528 GENERAL MILLS, INC. 2043 Phosphoru 146 358SC 123087 INDALEX WEST INC 3341 Manganes 416 356SJU 50234 SHELL WESTERN E&P INC. 1311 Beryllium 15 59 356BA 703 PACIFIC STEEL CASTING CO 3325 Manganes 412 352NSI 1 SIERRA PACIFIC INDUSTRIE 2421 Manganes Y 410 351SJU 20921 OWENS-BROCKWAY GLASS 3221 Cadmium 41 292 350SJU 50140 M.H. WHITTIER, CORPORAT 1311 Beryllium 13 55 328BUT 43 PACIFIC COAST PRODUCER 2033 ChlorineDi 1136 324MOJ 100006 CEMEX CALIFORNIA LLC - R 3241 Manganes 373 319TUO 15 SIERRA PACIFIC IND. (CHIN 2421 Manganes Y 363 310KER 572 RAND MINING COMPANY 1041 Manganes 344 294SJU 40208 SANTA FE ENERGY RESOURC1311 Phosphoru 115 283SC 800030 CHEVRON PRODUCTS CO. 2911 Cadmium 32 225 270SC 800089 EXXONMOBIL OIL CORPORA 2911 Beryllium 11 45 269NS 10006026 SANTA ROSA GEOTHERMAL C4961 Phosphoru 110 269VEN 36 PACIFIC CUSTOM MATERIAL 3259 Phosphoru Y 110 268SJU 2520 PARAMOUNT FARMS INC 723 Phosphine 1250 268IMP 54 AMERICAN GIRL MINE 1041 Cadmium 31 221 265SJU 15 WESTERN COTTON SERVICE2074 Cadmium 29 210 252BA 12626 VALERO REFINING COMPANY2911 Manganes 289 247FR 9999 BEALE AFB FACILITY WIDE 9711 Manganes Y 288 246SJU 41 ANDERSON CLAYTON CORP/O2074 Cadmium 29 205 245MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Cadmium Y 28 203 243MBU 1186 CEMEX - CEMENT PLANT 3241 Phosphoru 99 242MOJ 999900001 LEAD MASTERS 3341 Manganes 280 240SJU 50308 TEXACO USA, VENTURA PR 1311 Acetaldehy 12451 57 237SHA 51 BURNEY FOREST PRODUCT 2421 Manganes 276 236

2005


IMP 67 PLANT EAST MESA UNIT 2 4911 Phosphoru 96 236MOJ 8600591 MAGTFTC MCAGCC TWENTY9711 Antimony 275 235NSI 1 SIERRA PACIFIC INDUSTRIE 2421 Cadmium Y 27 193 231SJU 40028 CHAMPION PARTS WESTERN 3714 Cadmium 26 185 222MOJ 900002 SEARLES VALLEY MINERAL 1474 Cadmium 26 182 218AV 122802129 LANCASTER LANDFILL AND 9511 DieselExh 6332 3,229 217BA 935 LEVIN RICHMOND TERMINA 4491 Manganes 251 215MOJ 8800567 NAVAL AIR WEAPONS STATI 9711 Cadmium 25 176 211MOJ 100005 CEMEX QUARRY 3241 Cadmium 25 175 210SD 19 NATL STEEL & SHIPBUILDI 3731 Manganes Y 236 202VEN 137 WESTERN FARM SERVICE 7389 Manganes 235 201NCU 37 EVERGREEN PULP, INC 2611 AcetaldehyY 10509 48 200BA 12626 VALERO REFINING COMPANY2911 Cadmium 23 165 198SJU 1196 SUNMAID GROWERS OF CAL 179 Phosphoru 81 198BUT 45 WEHAH FARMS, INC. 723 Manganes Y 228 195SC 8547 QUEMETCO INC 3341 Cadmium 23 162 194COL 55 WADHAM ENERGY LTD PAR 4931 Cadmium Y 22 159 190SJU 20890 NEWARK SIERRA PAPERBOA2621 Cadmium 22 159 190SC 800327 GLENDALE CITY, GLENDAL 4931 Cadmium 22 158 190KER 20 LEHIGH SOUTHWEST CEMEN3241 Manganes Y 221 189VEN 445 CAMARILLO SANITARY DIST 4952 Phosphoru 77 189TUO 1 SIERRA PACIFIC IND. STAN 2421 Cadmium Y 22 155 186SC 102268 PREPRODUCTION PLASTICS,3089 T-2,4-diiso 76 1 185NSI 3 SIERRA PACIFIC INDUSTRIE 2421 Manganes Y 214 183KER 21 NATIONAL CEMENT CO 3241 Phosphoru Y 74 182BA 16 CONOCOPHILLIPS - SAN FR 2911 Glutaraldh 84 180VEN 144 LOS ROBLES HOSPITAL 8062 Glutaraldh N 84 179BUT 2 BUTTE COUNTY RICE GROW 723 Beryllium Y 7 30 179SC 131249 BP WEST COAST PRODUCTS2999 Cadmium 20 146 175SJU 50140 M.H. WHITTIER, CORPORAT 1311 Glutaraldh 81 174SJU 713 PARAMOUNT KING LLC 723 Phosphine 801 171BA 187 PACIFIC STEEL CASTING CO 3325 Manganes 200 171NSI 52 SIERRA AGGREGATES 1442 Beryllium 7 28 171GLE 14 GLENN GROWERS 723 Manganes 188 161SJU 285 DIAMOND WALNUT GROWERS723 Cadmium Y 19 133 160SC 44577 LONG BEACH CITY, SERRF 9199 Cadmium 19 132 159SJU 40032 CHEVRON - COALINGA/KET 1311 Beryllium 6 26 157SJU 122 MALIBU BOATS WEST, INC. 3732 MeDiphenD 641 157SJU 10427 GALLO GLASS COMPANY 3221 Cadmium Y 18 130 155SJU 4017 PARAMOUNT HULLING & SH 723 Phosphine 711 152NS 10006026 SANTA ROSA GEOTHERMAL C4961 Manganes 177 152SJU 50234 SHELL WESTERN E&P INC. 1311 Manganes 167 143FR 9999 BEALE AFB FACILITY WIDE 9711 Beryllium Y 6 24 141MOJ 11800001 MITSUBISHI CEMENT 2005 3241 Phosphoru 57 139VEN 22 HALACO ENGINEERING CO 3341 Manganes Y 161 137VEN 1139 VENTURA PORT DISTRICT 1629 DieselExh Y 4010 2,045 137MBU 1186 CEMEX - CEMENT PLANT 3241 Acetaldehy 7160 33 136KER 20 LEHIGH SOUTHWEST CEMEN3241 Cadmium Y 16 113 136SC 45448 GAS RECOVERY SYST LLC 4911 Cadmium 15 111 133SHA 43 WHEELABRATOR SHASTA E.C4931 Manganes 154 132KER 572 RAND MINING COMPANY 1041 DieselExh 3783 1,929 130SJU 257 CHEVRON USA INC. 1311 Beryllium 5 21 127SC 3704 ALL AMERICAN ASPHALT, UN2951 Phosphoru 52 126SC 113873 MM WEST COVINA LLC 4911 Cadmium 15 105 126

2005


LAS 15 H.L. POWER COMPANY 4931 Phosphoru Y 51 126SJU 20387 DIAMOND WALNUT GROWERS5145 Cadmium Y 14 103 123IMP 47 NEW CHARLESTON POWER L4911 Manganes 141 121SJU 40128 J.G. BOSWELL OIL MILL 723 Cadmium 14 100 119NS 10006028 NORTHERN CALIFORNIA PO 4961 Manganes 138 118SD 19 NATL STEEL & SHIPBUILDI 3731 Cadmium Y 14 97 116SJU 50140 M.H. WHITTIER, CORPORAT 1311 Cadmium 13 96 115SC 16264 INTERNATIONAL COATINGS 3087 Cadmium 13 92 110BUT 21 SUNWEST MILLING CO. INC 723 Manganes 128 110SJU 15 WESTERN COTTON SERVICE2074 Beryllium 4 18 110SAC 1028 DAVISON IRON WORKS INC 3441 Manganes N 128 109SJU 50002 ARCO OIL AND GAS COMPA 1311 Phosphoru 45 109NSI 3 SIERRA PACIFIC INDUSTRIE 2421 Cadmium Y 13 91 109SJU 41 ANDERSON CLAYTON CORP/O2074 Beryllium 4 18 107SC 124838 EXIDE TECHNOLOGIES 3341 Cadmium 12 89 106NS 10006025 UNOCAL GEOTHERMAL DIVI 4961 Bromine 1010 102SB 1325 THE POINT ARGUELLO PRO 1311 AcetaldehyN 5305 24 101KER 28 U.S. BORAX 1474 DieselExh Y 2835 1,446 97MOJ 11800001 MITSUBISHI CEMENT 2005 3241 DieselExh 2252 1,148 77VEN 41 AERA ENERGY LLC 1311 DieselExh Y 1985 1,013 68SC 140811 DUCOMMUN AEROSTRUCTUR3728 Cr(VI) 13 3,261 11MOJ 8400589 US ARMY NATIONAL TRAININ9711 Cr(VI) 9 2,346 8SD 99 ROHR INC 3728 Cr(VI) Y 9 2,331 8SC 116480 LA CITY, BUREAU OF STRE 2951 Cr(VI) 7 1,856 6SC 18989 BOWMAN PLATING CO INC 3471 Cr(VI) 7 1,769 6SJU 50234 SHELL WESTERN E&P INC. 1311 Cr(VI) 7 1,763 6NCU 37 EVERGREEN PULP, INC 2611 Cr(VI) Y 7 1,730 6IMP 47 NEW CHARLESTON POWER L4911 Cr(VI) 6 1,530 5MOJ 11800001 MITSUBISHI CEMENT 2005 3241 Cr(VI) 5 1,387 5KER 20 LEHIGH SOUTHWEST CEMEN3241 Cr(VI) Y 5 1,363 5SJU 566 LIQUID WASTE MANAGEMENT4953 Cr(VI) 5 1,301 4SC 16264 INTERNATIONAL COATINGS 3087 Cr(VI) 5 1,262 4ED 7 SIERRA PACIFIC INDUSTRIE 2421 Cr(VI) Y 4 1,097 4KER 21 NATIONAL CEMENT CO 3241 Cr(VI) Y 4 1,075 4SJU 40026 CERTAINTEED CORPORATI 3296 Cr(VI) Y 4 1,024 3SJU 20755 LIBBEY-OWENS-FORD CO. 3211 Cr(VI) 4 1,023 3SHA 44 DICALITE MINERALS CORPO 1499 Cr(VI) 4 1,015 3SJU 50118 CALMAT- INDUSTRIAL ASPH 2951 Asbestos 28 3,049SJU 40123 INDUSTRIAL ASPHALT 2951 Asbestos 26 2,816SC 16389 CEDARS-SINAI MEDICAL CT 8062 Asbestos 15 1,615AV 52002088 METALCLAD INSULATION CO1795 Asbestos 13 1,443

2004

DIS FACID FNAME FSIC POLABBRE CHTEMS CANCER_CHRONICACUTE maxSJU 625 CALMAT CO. 1446 Asbestos 1,647 177,336 177,336SC 14495 VISTA METALS CORPORATION 3341 2,3,7,8-TCD Y 1 94,316 6,250 94,316SJU 50234 SHELL WESTERN E&P INC. 1311 Nickel 15,248 6,739 52,218 44 52,218SC 4477 SO CAL EDISON CO 4911 DieselExhP Y 85,261 43,483 2,920 43,483SC 11192 HI-SHEAR CORPORATION 3452 Cr(VI) Y 143 36,465 122 36,465NS 10006011 GEYSERS POWER CO UNIT 12 4911 Phosphorus Y 13,249 32,409 32,409SJU 40032 CHEVRON - COALINGA/KETTL 1311 Nickel 8,236 3,640 28,204 24 28,204FR 9999 BEALE AFB FACILITY WIDE 9711 Nickel Y 7,021 3,103 24,045 20 24,045SJU 257 CHEVRON USA INC. 1311 Nickel 6,194 2,738 21,212 18 21,212MOJ 1200003 TXI RIVERSIDE CEMENT COM 3241 DieselExhP 39,087 19,934 1,339 19,934SC 22551 THUMS LONG BEACH CO, UNIT1311 GlutaraldhydY 7,950 17,016 17,016SJU 50140 M.H. WHITTIER, CORPORATIO 1311 Nickel 4,501 1,989 15,413 13 15,413GBU 3050309 COSO OPERATING COMPANY, 4961 H2S Y 810,800 13,884 331 13,884SJU 10316 DEL MONTE USA PLANT #1 2033 Cr(VI) 46 11,626 39 11,626SC 12129 BEVERLY HOSPITAL 8062 Asbestos 107 11,520 11,520SJU 257 CHEVRON USA INC. 1311 H2S 536,912 9,194 219 9,194MBU 272 CHEVRON U.S.A. 1311 Nickel 2,636 1,165 9,029 8 9,029SC 25786 SEVEN-UP/ROYAL CROWN BOT2086 Chlorine 10,050 8,604 1 8,604SJU 40208 SANTA FE ENERGY RESOURCE1311 Nickel 2,453 1,084 8,402 7 8,402SC 131003 BP WEST COAST PROD.LLC BP2911 Sulfuric AcidY 46,794 8,013 7 8,013IMP 15 IMPERIAL IRRIGATION DISTRI 4911 Chlorine Y 9,132 7,818 1 7,818SJU 299 UNOCAL OIL & GAS DIVISION 1311 Nickel 2,186 966 7,485 6 7,485SJU 247 MOBIL EXPLORATION AND PR 1311 Nickel 2,140 946 7,328 6 7,328SJU 50098 GOLDEN STATE METALS, INC. 5093 Asbestos 68 7,288 7,288SC 98155 ROTORCRAFT SUPPORT INC 3728 Cr(VI) 28 7,166 24 7,166NS 10006021 SONOMA POWER PLANT 4911 Cr(VI) Y 25 6,490 22 6,490KER 9 CALIFORNIA PORTLAND CEME 3241 Asbestos Y 60 6,465 6,465SC 43201 SNOW SUMMIT INC 7999 DieselExhP Y 12,470 6,360 427 6,360IMP 49 J.J. ELMORE 4911 H2S 367,088 6,286 150 6,286VEN 1266 MASON CONSTRUCT & ENGINE1629 DieselExhP 12,185 6,214 417 6,214SC 5973 SO CAL GAS CO 4923 Acrolein Y 2,154 6,147 194 6,147NS 10006028 NORTHERN CALIFORNIA POW 4961 Arsenic 1,052 5,900 6,003 95 6,003SC 20604 RALPHS GROCERY CO 5141 DieselExhP 11,601 5,917 397 5,917MBU 1482 UCSC 8221 DieselExhP 11,311 5,769 387 5,769AV 10231816 NORTHROP GRUMMAN 3721 StrontiumCh 87 5,542 19 5,542SC 4242 SAN DIEGO GAS & ELECTRIC 4922 Acrolein Y 1,928 5,502 174 5,502SAC 160 CONSOLIDATED FABRICATOR 3714 Lead Chrom Y 122 4,967 17 4,967SB 1735 CELITE CORPORATION 3295 Acrolein 1,720 4,907 155 4,907SC 48323 SIGMA PLATING CO INC 3471 Cr(VI) Y 18 4,616 15 4,616YS 5011 CALIFORNIA STATE PRISON- 9223 Sodium Hydr 121,618 4,339 260 4,339NS 10006010 GEYSERS POWER CO UNIT 11 4911 H2S Y 253,198 4,336 103 4,336SJU 247 MOBIL EXPLORATION AND PR 1311 H2S 252,547 4,324 103 4,324SC 800128 SO CAL GAS CO (EIS USE) 4922 Acrolein Y 1,443 4,118 130 4,118NS 10006011 GEYSERS POWER CO UNIT 12 4911 H2S Y 232,414 3,980 95 3,980KER 572 RAND MINING COMPANY 1041 Arsenic 631 3,538 3,600 57 3,600SJU 1130 CHEVRON U S A INC 1311 H2S 202,140 3,461 82 3,461NS 10006018 NCPA UNIT 2 4911 Arsenic Y 603 3,384 3,443 54 3,443SHA 51 BURNEY FOREST PRODUCTS 2421 Acrolein Y 1,161 3,313 105 3,313SC 14437 SAN ANTONIO COMMUNITY HO8062 Acrolein Y 912 2,603 82 2,603NS 10006007 GEYSERS POWER CO UNIT 8 4911 H2S Y 144,163 2,469 59 2,469SC 800089 EXXONMOBIL OIL CORPORATI 2911 Acrolein Y 723 2,064 65 2,064SB 1325 THE POINT ARGUELLO PROJE 1311 Acrolein N 676 1,929 61 1,929

2004

MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Arsenic Y 545 3,057 3,111 49NS 10006005 GEYSERS POWER CO UNIT 6 4911 H2S Y 118,696 2,032 48SC 9163 INLAND EMPIRE UTL AGEN, A 4959 Acrolein Y 535 1,526 48NS 10006006 GEYSERS POWER CO UNIT 7 4911 H2S Y 118,128 2,023 48SC 7796 TECHNI-CAST CORP 3366 Acrolein 498 1,421 45MBU 1186 CEMEX - CEMENT PLANT 3241 Acrolein 485 1,384 44SC 800236 LA CO. SANITATION DIST 4952 Acrolein Y 470 1,340 42NS 10006004 GEYSERS POWER CO UNIT 5 4911 H2S Y 100,494 1,721 41IMP 45 EARTH ENERGY, INC. 4911 H2S 96,155 1,646 39NS 10006025 UNOCAL GEOTHERMAL DIVISI 4961 H2S 95,652 1,638 39SC 8582 SO CAL GAS CO/PLAYA DEL R 4923 Acrolein Y 426 1,214 38SC 4451 TEXTRON FASTENING SYSTEM3452 Sodium HydrY 17,700 631 38SB 5019 SO CAL GAS - LA GOLETA 4922 Acrolein 399 1,140 36SB 2667 BREITBURN ENERGY- ORCUTT 1311 Acrolein N 394 1,125 36SD 4824 MCAS MIRAMAR 9711 Acrolein Y 393 1,121 35SC 132687 PRODUCTIVITY CALIFORNIA 3089 Acrolein 361 1,030 33SJU 50305 MOBIL 1311 Acrolein 353 1,008 32IMP 54 AMERICAN GIRL MINE 1041 Arsenic 325 1,823 1,855 29SC 1703 EASTERN MUNICIPAL WATER D4952 Acrolein 320 913 29LAK 290 CALPINE - CALISTOGA GEOT 4911 H2S Y 66,870 1,145 27SJU 50308 TEXACO USA, VENTURA PROD 1311 H2S 66,009 1,130 27SJU 50306 MOBIL 1311 Acrolein 288 822 26SC 4773 SPARTECH PLASTICS 3081 Acrolein 276 788 25SD 94 USN AIR STATION NORIS 9711 Acrolein Y 270 771 24AV 1.13E+08 AMERICAN TOWER HAUSER MO3669 Acrolein 269 769 24NS 10006020 NCPA UNIT 4 4911 H2S Y 59,183 1,013 24SB 2658 CAT CANYON 1311 Acrolein N 229 652 21SC 29110 ORANGE COUNTY SANITATION4952 Acrolein Y 215 613 19VEN 41 AERA ENERGY LLC 1311 Acrolein Y 215 613 19NS 10006012 GEYSERS POWER CO UNIT 14 4911 H2S Y 47,461 813 19SC 14833 SAINT JOHN'S HOSPITAL & H 8062 Sodium HydrY 8,427 301 18SJU 50054 CITY OF TULARE 9511 H2S 43,990 753 18SC 16575 TRIGEN-LA ENERGY CORP 4961 Acrolein Y 192 547 17SC 13433 SO ORANGE CO WASTEWATER4952 Acrolein Y 191 545 17IMP 43 ORMAT NEVADA, INC 4911 H2S Y 41,670 714 17SB 27 VENOCO - CARPINTERIA 1311 Acrolein Y 188 537 17KER 21 NATIONAL CEMENT CO 3241 Acrolein Y 188 536 17KER 28 U.S. BORAX 1474 As cmpd(inoY 186 1,046 1,064 17MOJ 1.05E+08 RELIANT ENERGY 4911 Formaldehy Y 85,542 873 4,883 16BA 591 EAST BAY MUNICIPAL UTILITY 4952 Acrolein Y 157 448 14SC 8724 CAL BUMPER CO INC 3471 Sodium Hydr 6,494 232 14IMP 53 PLANT EAST MESA PEM UNIT 4911 H2S 32,866 563 13SB 1325 THE POINT ARGUELLO PROJE 1311 Formaldehy N 73,498 750 4,195 13SJU 50308 TEXACO USA, VENTURA PROD 1311 Acrolein 143 408 13SJU 257 CHEVRON USA INC. 1311 Acrolein 142 406 13SHA 164 PACIFIC GAS & ELECTRIC 4922 Acrolein Y 141 403 13TUO 1 SIERRA PACIFIC IND. STANDA 2421 Arsenic Y 140 785 799 13MBU 926 MONTEREY REGION WASTE 4953 Acrolein 139 395 12NS 10006016 GEYSERS POWER CO UNIT 20 4911 H2S Y 30,436 521 12SJU 40164 PIRELLI ARMSTRONG TIRE CO 3011 Acrolein 136 388 12SC 77388 WESTERN MUNICIPAL WATER 4941 Acrolein 133 381 12SB 8012 PLATFORM HABITAT 1311 Acrolein Y 122 349 11NS 10006018 NCPA UNIT 2 4911 H2S Y 26,947 461 11

2004

IMP 45 EARTH ENERGY, INC. 4911 Arsenic 120 674 686 11SJU 50147 MCFARLAND ENERGY, INC. 1311 Acrolein 119 340 11SC 130211 PAPER-PAK INDUSTRIES 2621 Acrolein 114 326 10SB 1073 E & B - SOUTH CUYAMA 1311 Acrolein N 114 324 10SC 7417 EASTERN MUNICIPAL WATER D4952 Acrolein 110 314 10SC 118124 CEDAR FAIR LP, KNOTT'S BE 7996 Acrolein 110 314 10SJU 40026 CERTAINTEED CORPORATION 3296 Formaldehy Y 52,888 539 3,019 10NS 10006015 GEYSERS POWER CO UNIT 18 4911 H2S Y 23,432 401 10SC 29110 ORANGE COUNTY SANITATION4952 Formaldehy Y 51,863 529 2,960 9SJU 50178 NAVAL PETROLEUM RESERVE 1311 Formaldehy 51,007 520 2,911 9MOJ 1200003 TXI RIVERSIDE CEMENT COM 3241 Arsenic 103 576 586 9SJU 40224 SHELL WESTERN E & P INC. 1311 Acrolein 101 289 9SC 19133 HENRY MAYO NEWHALL MEMO8062 Acrolein 99 284 9MOJ 1200003 TXI RIVERSIDE CEMENT COM 3241 Acrolein 96 274 9SB 4639 ELYSIUM RUSSELL, LLC. 1311 Acrolein 95 272 9SJU 50234 SHELL WESTERN E&P INC. 1311 Arsenic 94 529 538 8BA 11 SHELL MARTINEZ REFINERY 2911 Formaldehy Y 46,543 475 2,657 8SC 800189 DISNEYLAND RESORT 7996 Acrolein Y 91 260 8SJU 40149 M.H. WHITTIER CORPORATION 1311 H2S 19,794 339 8MBU 23 AERA ENERGY LLC 1311 H2S 19,530 334 8SC 4477 SO CAL EDISON CO 4911 Acrolein Y 87 248 8SC 121454 BREITBURN ENERGY CO, LLC 1311 Acrolein 86 247 8VEN 36 PACIFIC CUSTOM MATERIALS 3259 Acrolein Y 85 244 8NS 10006014 GEYSERS POWER CO UNIT 17 4911 H2S Y 18,781 322 8SJU 50046 CHEVRON USA LOST HILLS GA1321 Acrolein 84 240 8SB 4640 SMRC/UNION SUGAR 2911 Acrolein 84 240 8SC 21104 HUNTINGTON BEACH CITY, W 9511 Acrolein Y 84 239 8MOJ 1200003 TXI RIVERSIDE CEMENT COM 3241 Formaldehy 41,148 420 2,349 7SJU 50049 CHEVRON WARREN GP 1321 Acrolein 80 228 7SJU 50140 M.H. WHITTIER, CORPORATIO 1311 H2S 17,392 298 7NS 10006024 AIDLIN GEOTHERMAL PROJEC 4911 H2S Y 17,365 297 7SB 1735 CELITE CORPORATION 3295 Formaldehy 38,431 392 2,194 7SC 800127 SO CAL GAS CO (EIS USE) 4923 Acrolein Y 77 221 7IMP 49 J.J. ELMORE 4911 Arsenic 77 432 440 7NS 10006026 SANTA ROSA GEOTHERMAL CO.4961 H2S 17,025 292 7SC 346 FRITO-LAY NORTH AMERICA, I 2096 Acrolein Y 76 218 7SJU 50002 ARCO OIL AND GAS COMPANY 1311 Arsenic 76 427 435 7SB 1708 CITY OF LOMPOC - WWT PLAN 4952 Acrolein Y 74 213 7SC 17301 ORANGE COUNTY SANITATION4952 Formaldehy Y 36,502 372 2,083 7IMP 44 VULCAN GEOTHERMAL 4911 Ammonia ### 1,052 7SB 1510 GATO CORPORATION 1311 Acrolein 72 207 7SJU 40042 CITY OF FRESNO, PUBLIC WO 4952 H2S 15,800 271 6SLO 24 CAL POLY STATE U 9223 Acrolein Y 71 203 6SC 131003 BP WEST COAST PROD.LLC BP2911 H2S Y 15,653 268 6SJU 50303 CHEVRON U.S.A. PRODUCTION1311 Acrolein 70 200 6BA 16 CONOCOPHILLIPS - SAN FRAN 2911 Formaldehy Y 34,035 347 1,943 6MOJ 1500535 PG&E HINKLEY COMPRESSOR 4922 Acrolein Y 65 185 6VEN 33 LA CONCHITA OIL & GAS PLAN 1311 Acrolein Y 64 184 6SB 4632 PT. PEDERNALES/LOMPOC OIL1311 Acrolein 64 182 6SC 8547 QUEMETCO INC 3341 Arsenic Y 63 352 358 6SC 138097 CASTLE PEAK RESOURCES LL 1311 Acrolein 62 176 6IMP 72 SALTON SEA POWER GEN/UNIT4911 Ammonia ### 888 6SD 221 USMC BASE MARINE GROUND 9711 Acrolein Y 61 176 6

2004

SAC 194 SACRAMENTO POWER AUTHO 4931 Acrolein Y 61 175 6SC 800089 EXXONMOBIL OIL CORPORATI 2911 Ammonia Y ### 882 6SJU 50047 CHEVRON USA 17Z NA GAS PL 1321 Acrolein 60 171 5SC 74396 CITY OF CERRITOS - WATER D 4941 Acrolein 60 170 5SJU 50282 VICTORY OIL COMPANY 1311 H2S 13,052 223 5MBU 272 CHEVRON U.S.A. 1311 H2S 13,025 223 5SC 100844 MEDALLION CALIFORNIA PRO 1311 Acrolein Y 58 166 5SB 4630 CASMALIA 1311 Acrolein 57 163 5SJU 20929 PACIFIC ENERGY 4911 Acrolein 57 161 5SC 17301 ORANGE COUNTY SANITATION4952 Acrolein Y 55 158 5SJU 257 CHEVRON USA INC. 1311 Formaldehy 26,531 271 1,514 5SC 800363 CONOCOPHILLIPS COMPANY 2911 Ammonia Y 902,333 773 5SB 8675 SMV EAST 1311 Acrolein 53 151 5KER 572 RAND MINING COMPANY 1041 HCN 92,124 1,753 5BA 778 SAN JOSE/SANTA CLARA WAT 4952 H2S Y 11,361 195 5SC 65818 CRESTLINE-LAKE ARROWHEA 4941 Acrolein 51 146 5KER 21 NATIONAL CEMENT CO 3241 Formaldehy Y 25,320 258 1,445 5BA 13289 LOS ESTEROS CRITICAL ENER4911 Formaldehy 25,131 256 1,434 5LAK 50 CALPINE - WEST FORD FLAT 4911 H2S Y 11,200 192 5SC 800030 CHEVRON PRODUCTS CO. 2911 Formaldehy Y 24,885 254 1,420 5SJU 40139 J.R. SIMPLOT COMPANY 2819 Ammonia 838,549 718 4SB 1482 EXXON - SYU PROJECT 1311 Acrolein Y 49 140 4SC 16211 MOTION PICTURE & TELEVISI 8051 Acrolein 49 139 4SB 1063 VENOCO - ELLWOOD 1311 Acrolein 48 138 4SC 52886 GARDEN GROVE CITY, PUB. W 4941 Acrolein 47 133 4SC 94998 THE GAGE CANAL COMPANY 4941 Acrolein 46 132 4SC 83509 THE TERMO CO 1311 Acrolein 45 128 4SAC 195 SACRAMENTO COGENERATIO 4931 Acrolein Y 45 128 4SHA 59 FAWNDALE ROCK & ASPHALT (2951 Arsenic 45 252 256 4NS 10006020 NCPA UNIT 4 4911 Ammonia Y 749,090 641 4BA 778 SAN JOSE/SANTA CLARA WAT 4952 Ammonia Y 739,092 633 4SC 5973 SO CAL GAS CO 4923 Formaldehy Y 21,669 221 1,237 4VEN 445 CAMARILLO SANITARY DISTRI 4952 H2S 9,674 166 4SC 800370 EQUILON ENTER., LLC, SHELL 2911 Formaldehy Y 21,514 219 1,228 4NS 10006021 SONOMA POWER PLANT 4911 H2S Y 9,538 163 4MBU 577 DUKE ENERGY MOSS LANDING4911 Acrolein 43 123 4SJU 50256 TEXACO - BAKERSFIELD DIVIS 1311 H2S 9,411 161 4NS 10006028 NORTHERN CALIFORNIA POW 4961 H2S 9,383 161 4IMP 51 J.M. LEATHERS 4911 Ammonia 706,075 605 4SC 660 AMERIGAS PROPANE L.P. 5171 Acrolein Y 42 119 4SJU 50140 M.H. WHITTIER, CORPORATIO 1311 Acrolein 41 117 4IMP 47 NEW CHARLESTON POWER L.P4911 Ammonia 674,286 577 4SJU 1130 CHEVRON U S A INC 1311 Acrolein 40 113 4MOJ 1500039 PG&E TOPOCK COMPRESSOR 4922 Acrolein Y 40 113 4SJU 247 MOBIL EXPLORATION AND PR 1311 Formaldehy 19,244 196 1,098 4SB 2638 PURISIMA HILLS LLC - BLAIR 1311 Acrolein 39 111 4SAC 106 REGIONAL SANITATION DIST 4952 H2S 8,567 147 3SC 54773 LAS VIRGENES MUNICIPAL WA 4941 Acrolein 38 109 3LAK 230 CALPINE UNIT 13: POWER/STE 4911 Ammonia Y 642,000 550 3SLO 13 CONOCO PHILLIPS SANTA MAR2911 Nickel Y 1,203 532 4,120 3SB 8702 ZACA FIELD 1311 Acrolein 38 108 3SJU 2133 REFINERIES SERVICE 1382 Acrolein 37 105 3SC 9053 TRIGEN- LA ENERGY CORP 4961 Acrolein Y 37 104 3

2004

SC 22092 WESTERN TUBE & CONDUIT C 3317 Acrolein Y 36 103 3SC 800026 ULTRAMAR INC (NSR USE ONL 2911 H2S Y 7,927 136 3BA 11661 RHODIA INC 2819 Sulfuric AcidY 22,595 3,869 3SJU 50997 MOBIL 1311 Acrolein 36 101 3BA 41 OWENS CORNING 3296 Formaldehy Y 17,192 175 981 3PLA 28 SIERRAPINE LTD - ROCKLIN 2493 Formaldehy Y 17,190 175 981 3SC 800089 EXXONMOBIL OIL CORPORATI 2911 Sulfuric AcidY 21,800 3,733 3SJU 257 CHEVRON USA INC. 1311 Arsenic 34 190 193 3SC 800181 CALIFORNIA PORTLAND CEMEN3241 Formaldehy Y 16,615 169 948 3COL 43 PIRELLI CABLE CORPORATION3643 Copper 17,300 1,234 3LAK 240 CALPINE UNIT 16: POWER/STE 4911 H2S Y 7,204 123 3SJU 50177 NAVAL PETROLEUM RESERVE 1311 Formaldehy 15,954 163 911 3NSI 52 SIERRA AGGREGATES 1442 Arsenic 32 181 184 3FR 9999 BEALE AFB FACILITY WIDE 9711 Arsenic Y 32 179 183 3SC 4451 TEXTRON FASTENING SYSTEM3452 Sulfuric AcidY 20,039 3,431 3MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Nickel Y 990 438 3,392 3LAK 240 CALPINE UNIT 16: POWER/STE 4911 Ammonia Y 526,120 450 3NS 10006026 SANTA ROSA GEOTHERMAL CO.4961 Arsenic 31 174 177 3MOJ 1500535 PG&E HINKLEY COMPRESSOR 4922 Formaldehy Y 15,251 156 870 3SC 800128 SO CAL GAS CO (EIS USE) 4922 Formaldehy Y 15,063 154 860 3BA 568 SAN FRANCISCO SOUTH EAST 4952 H2S 6,561 112 3SC 800089 EXXONMOBIL OIL CORPORATI 2911 Arsenic Y 29 163 166 3SJU 20890 NEWARK SIERRA PAPERBOAR 2621 Nickel 906 400 3,103 3IMP 50 A. W. HOCH 4911 Ammonia 477,456 409 3SC 4242 SAN DIEGO GAS & ELECTRIC 4922 Formaldehy Y 13,760 140 785 3SC 800193 LA CITY, DWP VALLEY GENER 4911 Formaldehy Y 13,307 136 760 2MBU 602 EXXONMOBIL CORP 4612 H2S 5,886 101 2SD 2631 KYOCERA AMERICA INC 3469 Formaldehy Y 13,155 134 751 2SJU 50234 SHELL WESTERN E&P INC. 1311 Mercury 252 479 2NS 10006028 NORTHERN CALIFORNIA POW 4961 Nickel 830 367 2,843 2SC 3671 EISENHOWER MEDICAL CENT 8062 Formaldehy 12,623 129 720 2NS 10006020 NCPA UNIT 4 4911 Mercury Y 236 448 2SJU 50308 TEXACO USA, VENTURA PROD 1311 Formaldehy 12,288 125 701 2NS 10006025 UNOCAL GEOTHERMAL DIVISI 4961 Arsenic 24 135 138 2SJU 299 UNOCAL OIL & GAS DIVISION 1311 Arsenic 24 134 136 2SC 800089 EXXONMOBIL OIL CORPORATI 2911 Nickel Y 746 330 2,555 2SJU 40152 MADERA GLASS COMPANY 3221 Arsenic 24 132 135 2SC 800363 CONOCOPHILLIPS COMPANY 2911 Sulfuric AcidY 14,827 2,539 2BA 11866 LOS MEDANOS ENERGY CENT 4911 Formaldehy Y 11,582 118 661 2SJU 40161 PG&E KETTLEMAN COMPRESS4931 Formaldehy Y 11,440 117 653 2SJU 20921 OWENS-BROCKWAY GLASS CO3221 Arsenic 23 129 131 2KER 20 LEHIGH SOUTHWEST CEMENT 3241 Arsenic Y 23 126 129 2SJU 477 PILKINGTON NORTH AMERICA,3211 Ammonia Y 379,116 325 2GBU 3050309 COSO OPERATING COMPANY, 4961 Arsenic Y 22 123 125 2BA 14628 TESORO REFINING AND MARK 2911 Formaldehy 10,791 110 616 2SD 541 CABRILLO POWER II LLC NORT4911 Arsenic Y 22 122 124 2SJU 40042 CITY OF FRESNO, PUBLIC WO 4952 Ammonia 363,047 311 2SD 540 CABRILLO POWER II LLC MIR 4911 Arsenic Y 21 120 122 2IMP 53 PLANT EAST MESA PEM UNIT 4911 Ammonia 359,249 308 2COL 49 PG&E DELEVAN COMPRESSOR4923 Formaldehy Y 10,547 108 602 2NS 10006014 GEYSERS POWER CO UNIT 17 4911 Arsenic Y 21 117 119 2SC 131003 BP WEST COAST PROD.LLC BP2911 Ammonia Y 349,794 299 2SC 800030 CHEVRON PRODUCTS CO. 2911 Sulfuric AcidY 12,550 2,149 2

2004

IMP 52 ORMESA 1H 4911 Ammonia 333,990 286 2BA 2478 UCSF/PARNASSUS 8062 Formaldehy Y 9,801 100 559 2SD 88196 SAN DIEGO CITY OF MIRAMAR 4953 Arsenic Y 19 107 109 2BA 22 CONOCO PHILLIPS REFINING 2999 Mercury Y 181 344 2SC 14437 SAN ANTONIO COMMUNITY HO8062 Formaldehy Y 9,393 96 536 2MOJ 1500039 PG&E TOPOCK COMPRESSOR 4922 Formaldehy Y 9,328 95 532 2NS 10006021 SONOMA POWER PLANT 4911 Arsenic Y 19 105 107 2MBU 1186 CEMEX - CEMENT PLANT 3241 Mercury 175 333 2SC 52517 REXAM PLC, REXAM BEVERA 3411 Formaldehy Y 9,055 92 517 2MOJ 11800001 MITSUBISHI CEMENT 2000 3241 Arsenic Y 18 101 103 2BA 51 UNITED AIRLINES, SF MAINTE 4581 Formaldehy Y 8,805 90 503 2MBU 926 MONTEREY REGION WASTE 4953 Formaldehy 8,775 90 501 2SD 89296 SD METRO PUMPING STATION 4952 Formaldehy Y 8,672 88 495 2PLA 13 GEORGIA PACIFIC CORPORAT 2421 Mercury 165 314 2BA 41 OWENS CORNING 3296 Ammonia Y 286,931 246 2SJU 50037 CHEVRON BITTERWATER PUM 4612 Nickel 536 237 1,835 2BA 8664 CROCKETT COGENERATION, A4931 Ammonia Y 285,448 244 2SB 1735 CELITE CORPORATION 3295 Ammonia 283,381 243 2SC 101656 AIR PRODUCTS AND CHEMICAL2813 Ammonia Y 280,801 240 2MBU 1482 UCSC 8221 Formaldehy 8,158 83 466 1MOJ 11800001 MITSUBISHI CEMENT 2000 3241 Mercury Y 156 297 1BA 10 CHEVRON PRODUCTS COMPA 2911 Ammonia Y 276,590 237 1SC 131003 BP WEST COAST PROD.LLC BP2911 Mercury Y 155 295 1SC 18452 UNIVERSITY OF CALIFORNIA, 8221 Formaldehy Y 7,939 81 453 1IMP 15 IMPERIAL IRRIGATION DISTRI 4911 Nickel Y 498 220 1,706 1SC 800089 EXXONMOBIL OIL CORPORATI 2911 Mercury Y 148 281 1LAS 15 H.L. POWER COMPANY 4931 Ammonia Y 261,906 224 1SC 800236 LA CO. SANITATION DIST 4952 Formaldehy Y 7,651 78 437 1SAC 106 REGIONAL SANITATION DIST 4952 Ammonia 259,762 222 1TUO 1 SIERRA PACIFIC IND. STANDA 2421 Formaldehy Y 7,629 78 435 1SC 131003 BP WEST COAST PROD.LLC BP2911 Nickel Y 477 211 1,634 1BA 12626 VALERO REFINING COMPANY -2911 Ammonia Y 254,382 218 1BA 17 HANSON PERMANENTE CEME 3241 Mercury Y 143 272 1NS 10006018 NCPA UNIT 2 4911 Nickel Y 475 210 1,625 1SAC 196 KIEFER LANDFILL 4953 Formaldehy Y 7,429 76 424 1SC 68122 TIDELANDS OIL PRODUCTION 1311 Formaldehy Y 7,340 75 419 1SHA 51 BURNEY FOREST PRODUCTS 2421 Formaldehy Y 7,310 75 417 1BA 621 CITY OF SANTA CLARA, SILICO4941 Formaldehy Y 7,291 74 416 1SC 800074 LA CITY, DWP HAYNES GENER 4911 Ammonia Y 247,812 212 1SC 800074 LA CITY, DWP HAYNES GENER 4911 Formaldehy Y 7,060 72 403 1IMP 75 IMPERIAL RESOURCE RECOVE4911 HCl 157,334 2,993 1SC 800030 CHEVRON PRODUCTS CO. 2911 Ammonia Y 238,080 204 1IMP 54 AMERICAN GIRL MINE 1041 HCN 25,053 477 1SLO 13 CONOCO PHILLIPS SANTA MAR2911 HCl Y 153,242 2,916 1SC 55449 BKK CORPORATION, LANDFILL 4953 HCl Y 152,336 2,898 1SAC 194 SACRAMENTO POWER AUTHO 4931 Formaldehy Y 6,812 69 389 1SHA 51 BURNEY FOREST PRODUCTS 2421 Ammonia Y 223,000 191 1MBU 1058 PACIFIC RECOVERY CORP 4931 Formaldehy 6,537 67 373 1BA 14628 TESORO REFINING AND MARK 2911 Sulfuric Acid 8,322 1,425 1IMP 71 UNITS 1 AND 2 POWER PLANT 4911 Ammonia 218,772 187 1BA 12626 VALERO REFINING COMPANY -2911 Nickel Y 408 181 1,399 1NS 10006021 SONOMA POWER PLANT 4911 Ammonia Y 217,418 186 1NS 10006024 AIDLIN GEOTHERMAL PROJEC 4911 Mercury Y 122 231 1

2004

BA 541 PACIFIC GAS & ELECTRIC CO 4922 Formaldehy Y 6,171 63 352 1COL 55 WADHAM ENERGY LTD PARTN 4931 Formaldehy Y 6,136 63 350 1SC 800240 TIN, INC. TEMPLE-INLAND, DB 2631 Formaldehy Y 6,069 62 346 1GLE 43 MOBIL EXPL'N & PROD'G U.S. 1311 Formaldehy 6,001 61 343 1SC 114801 RHODIA INC. 2819 Sulfuric AcidY 7,590 1,300 1NS 10006007 GEYSERS POWER CO UNIT 8 4911 Ammonia Y 198,595 170 1VEN 33 LA CONCHITA OIL & GAS PLAN 1311 Formaldehy Y 5,814 59 332 1SC 131003 BP WEST COAST PROD.LLC BP2911 Formaldehy Y 5,776 59 330 1SJU 40224 SHELL WESTERN E & P INC. 1311 Nickel 365 162 1,251 1MOD 2501 TIONESTA COMPRESSOR STAT4932 Formaldehy Y 5,640 58 322 1MBU 1186 CEMEX - CEMENT PLANT 3241 Formaldehy 5,607 57 320 1SC 9163 INLAND EMPIRE UTL AGEN, A 4959 Formaldehy Y 5,597 57 319 1SD 2930 NORTH COUNTY PLATING & PO3471 Nickel 354 156 1,211 1SC 800362 CONOCOPHILLIPS COMPANY 2911 Sulfuric AcidY 6,809 1,166 1SJU 40214 SHELL OIL - KETTLEMAN PUMP4612 Nickel 340 150 1,164 1SJU 50229 SHELL OIL WASCO PUMP STA 4612 Nickel 340 150 1,164 1SD 937 SEA WORLD INC 7996 Formaldehy Y 5,315 54 303 1SC 115394 AES ALAMITOS, LLC 4911 Ammonia Y 180,521 155 1SC 800327 GLENDALE CITY, PUBLIC SER 4931 Nickel 338 149 1,158 1SJU 50002 ARCO OIL AND GAS COMPANY 1311 Formaldehy 5,276 54 301 1SB 1482 EXXON - SYU PROJECT 1311 Formaldehy Y 5,207 53 297 1NS 10006006 GEYSERS POWER CO UNIT 7 4911 Ammonia Y 176,101 151 1SC 19194 EPPINK OF CALIFORNIA 2491 Formaldehy 5,144 52 294 1SD 73 CABRILLO POWER I LLC ENCI 4911 Nickel Y 318 141 1,089 1SAC 195 SACRAMENTO COGENERATIO 4931 Formaldehy Y 4,973 51 284 1SC 800193 LA CITY, DWP VALLEY GENER 4911 Ammonia Y 167,259 143 1SC 3585 R. R. DONNELLEY & SONS CO, 2752 Formaldehy Y 4,902 50 280 1IMP 46 SANTA FE PACIFIC GOLD COR 1041 HCN Y 17,705 337 1BA 22 CONOCO PHILLIPS REFINING 2999 HCl Y 108,859 2,071 1SJU 10316 DEL MONTE USA PLANT #1 2033 Nickel 304 134 1,041 1SJU 257 CHEVRON USA INC. 1311 Mercury 90 171 1SJU 50046 CHEVRON USA LOST HILLS GA1321 Formaldehy 4,680 48 267 1SJU 20653 J.R. SIMPLOT COMPANY 2873 HF 11,850 145 1BA 3011 IPT SRI COGENERATION INC 4931 Formaldehy Y 4,590 47 262 1SJU 50002 ARCO OIL AND GAS COMPANY 1311 Nickel 292 129 999 1SHA 2 LEHIGH SOUTHWEST CEMENT 3241 Mercury Y 87 166 1SC 800089 EXXONMOBIL OIL CORPORATI 2911 Formaldehy Y 4,502 46 257 1SC 45448 GAS RECOVERY SYST LLC (C 4911 Nickel Y 287 127 983 1IMP 43 ORMAT NEVADA, INC 4911 Ammonia Y 152,770 131 1NSI 3 SIERRA PACIFIC INDUSTRIES 2421 Formaldehy Y 4,442 45 254 1SD 73 CABRILLO POWER I LLC ENCI 4911 Formaldehy Y 4,421 45 252 1SC 4477 SO CAL EDISON CO 4911 Formaldehy Y 4,420 45 252 1LAS 11 CALIF CORRECTIONAL CENTE 9223 Nickel Y 279 123 956 1KER 20 LEHIGH SOUTHWEST CEMENT 3241 Mercury Y 84 159 1NS 10006015 GEYSERS POWER CO UNIT 18 4911 Ammonia Y 148,111 127 1SC 8547 QUEMETCO INC 3341 Formaldehy Y 4,282 44 244 1SD 72 DUKE ENERGY SOUTH BAY LL 4911 Nickel Y 273 121 936 1SJU 593 OWENS-BROCKWAY GLASS CO3221 Ammonia Y 145,424 125 1SHA 2 LEHIGH SOUTHWEST CEMENT 3241 HCl Y 93,900 1,787 1BA 16 CONOCOPHILLIPS - SAN FRAN 2911 Mercury Y 80 153 1MBU 1347 SOLEDAD ENERGY PARTNERS4911 Formaldehy 4,030 41 230 1MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Formaldehy Y 4,011 41 229 1BA 2371 USS-POSCO INDUSTRIES 3312 Sulfuric AcidY 5,038 863 1

2004

SC 56547 MARCEL ELECTRONICS 3672 Formaldehy 3,810 39 217 1GBU 1 AMERICAN PERLITE COMPANY3295 Nickel Y 239 105 817 1SC 50418 ORANGE COUNTY, IWMD( OLIN4953 Formaldehy Y 3,738 38 213 1VEN 41 AERA ENERGY LLC 1311 Formaldehy Y 3,714 38 212 1BA 778 SAN JOSE/SANTA CLARA WAT 4952 Formaldehy Y 3,711 38 212 1SJU 50147 MCFARLAND ENERGY, INC. 1311 Formaldehy 3,649 37 208 1SJU 50170 MONARCH COGENERATION 1984931 Ammonia 123,867 106 1SJU 232 NAVAL COMMUNICATION STAT9711 Nickel 232 103 795 1SJU 50142 MARATHON OIL S COLES LEVE1321 Formaldehy 3,610 37 206 1BA 907 CENTRAL CONTRA COSTA SAN4952 Formaldehy Y 3,591 37 205 1SHA 255 KNAUF FIBER GLASS GMBH 3296 Ammonia 121,000 104 1IMP 53 PLANT EAST MESA PEM UNIT 4911 Benzene 48,649 2,398 139 1MOJ 11800001 MITSUBISHI CEMENT 2000 3241 HCl Y 77,780 1,480 1BA 591 EAST BAY MUNICIPAL UTILITY 4952 Formaldehy Y 3,400 35 194 1SJU 21150 SIMPSON PAPER COMPANY 2521 Formaldehy Y 3,316 34 189 1SC 69646 ORANGE COUNTY, IWMD (BO 4953 Formaldehy Y 3,272 33 187 1SC 800030 CHEVRON PRODUCTS CO. 2911 Nickel Y 206 91 706 1NSI 1 SIERRA PACIFIC INDUSTRIES 2421 Formaldehy Y 3,196 33 182 1SC 1703 EASTERN MUNICIPAL WATER D4952 Formaldehy 3,122 32 178 1SC 68112 TIDELANDS OIL PRODUCTION 1311 Formaldehy Y 3,122 32 178 1SB 5019 SO CAL GAS - LA GOLETA 4922 Formaldehy 3,114 32 178 1IMP 47 NEW CHARLESTON POWER L.P4911 Chlorine 6,951 5,951 1BA 8664 CROCKETT COGENERATION, A4931 Formaldehy Y 3,101 32 177 1SHA 18 SIERRA PACIFIC IND. - BURNE 2421 Formaldehy Y 3,100 32 177 1SC 49111 SUNSHINE CANYON LANDFILL 4953 Formaldehy Y 3,094 32 177 1SB 2667 BREITBURN ENERGY- ORCUTT 1311 Formaldehy N 3,072 31 175 1FR 2023 TRI-UNION 1311 Chlorine N 6,843 5,859 1LAS 4 SIERRA PACIFIC IND 2421 Formaldehy 3,030 31 173 1SC 8582 SO CAL GAS CO/PLAYA DEL R 4923 Formaldehy Y 2,977 30 170 1SC 14495 VISTA METALS CORPORATION 3341 Copper Y 3,160 225 1SC 9961 RIVERSIDE CITY, WATER QUA 4941 Formaldehy Y 2,941 30 168 1MBU 1015 OWL COMPANIES 7011 Formaldehy 2,927 30 167 1MOJ 1200003 TXI RIVERSIDE CEMENT COM 3241 HCl 64,370 1,225 1SAC 1 AEROJET 3761 HCl Y 64,347 1,224 1SC 800089 EXXONMOBIL OIL CORPORATI 2911 HCl Y 63,506 1,208 1SAC 112 GRAFIL INC 2824 HCN Y 10,172 194 1SC 132687 PRODUCTIVITY CALIFORNIA 3089 Formaldehy 2,810 29 160 1SJU 15 WESTERN COTTON SERVICES 2074 Nickel 179 79 612 1SJU 41 ANDERSON CLAYTON CORP/OI2074 Nickel 174 77 596 0SD 415 APPLIED ENERGY INC 4931 Formaldehy Y 2,676 27 153 0SJU 50228 SHELL OIL MID PUMPING STAT 4612 Nickel 170 75 582 0SC 119907 BERRY PETROLEUM COMPAN 1311 Formaldehy Y 2,656 27 152 0NCU 60 PACIFIC LUMBER COMPANY, T 2421 Formaldehy Y 2,645 27 151 0SJU 50234 SHELL WESTERN E&P INC. 1311 Formaldehy 2,628 27 150 0BA 12626 VALERO REFINING COMPANY -2911 Formaldehy Y 2,620 27 150 0SD 6974 RIDGEWOOD CALIFORNIA PO 4931 Formaldehy 2,553 26 146 0SC 4451 TEXTRON FASTENING SYSTEM3452 HCl Y 56,410 1,073 0SD 72 DUKE ENERGY SOUTH BAY LL 4911 Formaldehy Y 2,516 26 144 0SC 14495 VISTA METALS CORPORATION 3341 Nickel Y 159 70 544 0MOJ 11800001 MITSUBISHI CEMENT 2000 3241 Formaldehy Y 2,479 25 141 0SD 5270 APPLIED ENERGY INC 4931 Formaldehy Y 2,449 25 140 0SJU 20921 OWENS-BROCKWAY GLASS CO3221 HCl 53,525 1,018 0VEN 388 SENECA RESOURCES CORP. 1311 Formaldehy Y 2,349 24 134 0

2004

SC 45953 HAYES LEMMERZ INTERNATION3714 Sulfuric AcidY 2,970 509 0BA 1634 NAPA STATE HOSPITAL 8063 Formaldehy Y 2,312 24 132 0SC 800026 ULTRAMAR INC (NSR USE ONL 2911 Formaldehy Y 2,302 23 131 0SC 800170 LA CITY, DWP HARBOR GENER4911 Formaldehy Y 2,270 23 130 0NCU 5 HAMBRO FOREST PROD 2493 Formaldehy Y 2,251 23 129 0BA 227 CRITERION CATALYSTS COMP 2819 Nickel Y 141 62 484 0SJU 20387 DIAMOND WALNUT GROWERS, 5145 Methyl BromY 91,400 3,130 0SC 1912 SADDLEBACK COMMUNITY COL8221 Formaldehy 2,200 22 126 0BA 10 CHEVRON PRODUCTS COMPA 2911 Formaldehy Y 2,197 22 125 0VEN 970 DOS CUADRAS OFFSHORE RES1311 Formaldehy Y 2,196 22 125 0NSI 52 SIERRA AGGREGATES 1442 Nickel 140 62 478 0PLA 34 SIERRA PACIFIC INDUSTRIES 2421 Formaldehy Y 2,184 22 125 0SD 309 SALK INSTITUTE 8733 Formaldehy Y 2,180 22 124 0SJU 50303 CHEVRON U.S.A. PRODUCTION1311 Formaldehy 2,175 22 124 0SHA 255 KNAUF FIBER GLASS GMBH 3296 Sulfuric Acid 2,740 469 0SHA 42 BURNEY MOUNTAIN POWER 4931 Formaldehy Y 2,110 22 120 0SJU 285 DIAMOND WALNUT GROWERS, 723 Propylene OY 69,540 437 397 0SHA 43 WHEELABRATOR SHASTA E.C.I4931 Formaldehy Y 2,069 21 118 0IMP 15 IMPERIAL IRRIGATION DISTRI 4911 Formaldehy Y 2,056 21 117 0SJU 50035 CHAPARRAL PETROLEUM INC. 1311 Toluene 806,120 460 0SC 43436 TST, INC. 3341 Formaldehy Y 2,045 21 117 0SC 139010 RIPON COGENERATION LLC 4911 Formaldehy 2,030 21 116 0SD 118 CP KELCO 2099 Formaldehy Y 2,010 21 115 0BA 23 GENERAL CHEMICAL CORPOR 2819 Sulfuric AcidY 2,452 420 0SC 20197 LAC/USC MEDICAL CENTER 8062 Formaldehy Y 1,919 20 110 0SC 16575 TRIGEN-LA ENERGY CORP 4961 Formaldehy Y 1,896 19 108 0BA 17 HANSON PERMANENTE CEME 3241 Formaldehy Y 1,885 19 108 0SJU 50113 HIGH SIERRA LIMITED 4911 Formaldehy 1,870 19 107 0SJU 11053 TRI-VALLEY GROWERS PLANT 2033 Nickel 117 52 401 0SC 129497 THUMS LONG BEACH CO 4911 Formaldehy 1,820 19 104 0SJU 179 TRIANGLE PACIFIC CORP. 2434 Formaldehy 1,802 18 103 0VEN 4 VINTAGE PETROLEUM INC. 1311 Formaldehy Y 1,798 18 103 0SD 8469 GOAL LINE LP 4931 Formaldehy Y 1,792 18 102 0SB 2658 CAT CANYON 1311 Formaldehy N 1,787 18 102 0SD 4824 MCAS MIRAMAR 9711 Formaldehy Y 1,784 18 102 0LAS 16 MT. LASSEN POWER 4931 Formaldehy Y 1,764 18 101 0SC 68118 TIDELANDS OIL PRODUCTION 1311 Formaldehy Y 1,763 18 101 0SC 115315 RELIANT ENERGY ETIWANDA, 4911 Sulfuric AcidY 2,250 385 0SC 23589 INTERNATIONAL EXTRUSION 3354 Sulfuric Acid 2,190 375 0IMP 43 ORMAT NEVADA, INC 4911 Benzene Y 23,680 1,167 68 0SC 3704 ALL AMERICAN ASPHALT, UNIT2951 Nickel 109 48 374 0NS 10006021 SONOMA POWER PLANT 4911 Nickel Y 107 47 366 0SJU 50251 TEXACO REFINING & MARKET 9411 Benzene Y 22,438 1,106 64 0MBU 272 CHEVRON U.S.A. 1311 Chlorine 3,451 2,955 0SJU 40165 PPG INDUSTRIES INC. 3211 HCl Y 34,507 657 0SC 131732 NEWPORT FAB, LLC 3764 Sulfuric Acid 1,970 337 0NSI 3 SIERRA PACIFIC INDUSTRIES 2421 Nickel Y 96 42 328 0SJU 50029 CALIFORNIA CORRECTIONAL I 9223 Chlorine 3,324 2,846 0SC 800370 EQUILON ENTER., LLC, SHELL 2911 Nickel Y 94 41 320 0MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Copper Y 1,502 107 0SJU 50182 OXY USA INC. 1311 Nickel 90 40 307 0SC 18188 PLASMA TECHNOLOGY INCOR 3479 Nickel 89 39 304 0SC 95433 ORANGE COUNTY METAL PRO 3499 Chlorine 3,040 2,603 0

2004

SAC 194 SACRAMENTO POWER AUTHO 4931 Sulfuric AcidY 1,726 296 0MOJ 5400246 AEROCHEM INC 3728 HCl Y 29,586 563 0COL 54 ARKOMA PRODUCTIONS CO 1381 Chlorine 2,956 2,530 0SJU 40128 J.G. BOSWELL OIL MILL 723 Nickel 81 36 279 0COL 34 COASTAL OIL & GAS CORP. 1381 Chlorine 2,839 2,431 0SB 1661 SISQUOC SAND, ROCK AND G 2951 Nickel 80 35 275 0BA 1438 NEW UNITED MOTOR MANUFA 3711 EGBE Y 185,053 1,584 0TUO 1 SIERRA PACIFIC IND. STANDA 2421 Nickel Y 79 35 271 0LAS 4 SIERRA PACIFIC IND 2421 Nickel 79 35 271 0FR 19002 CUSTOM CHROME & BUMPER 3471 Sulfuric Acid 1,530 262 0SJU 239 TRACY PUMP STATION 4612 Nickel 75 33 256 0FR 18 HARTER PIK'DRITE, INC. 2033 Chlorine 2,500 2,140 0YS 5155 CHIRON CORPORATION 2834 Sulfuric Acid 1,409 241 0BA 646 SILICONIX, INCORPORATED 3674 Sulfuric Acid 1,353 232 0COL 36 P G & E RESOURCES COMPAN 1381 Chlorine 2,330 1,995 0FR 22 P G & E RESOURCES 1311 Chlorine 2,287 1,958 0SJU 285 DIAMOND WALNUT GROWERS, 723 Methyl BromY 42,400 1,452 0LAS 16 MT. LASSEN POWER 4931 Nickel Y 65 29 222 0SC 22379 CHROMALLOY LOS ANGELES 7699 Nickel 62 27 212 0SHA 59 FAWNDALE ROCK & ASPHALT (2951 Nickel 62 27 211 0NSI 1 SIERRA PACIFIC INDUSTRIES 2421 Nickel Y 61 27 209 0BA 194 PCC STRUCTURALS - SAN LE 3324 Nickel 61 27 209 0NCU 60 PACIFIC LUMBER COMPANY, T 2421 Nickel Y 58 26 198 0SJU 50247 TANNEHILL OIL COMPANY 1311 Nickel Y 56 25 192 0BA 31 DOW CHEMICAL COMPANY 2879 Chlorine Y 1,917 1,641 0SC 800426 PRIME WHEEL CORP 3471 Nickel 53 24 183 0TUO 12 PACIFIC-ULTRAPOWER CHINE 4911 Nickel Y 52 23 177 0SD 8201 CA PLATING 3471 Nickel Y 51 23 175 0SC 9496 BENDER MACHINE, INC. 3599 Nickel Y 51 22 174 0FR 19002 CUSTOM CHROME & BUMPER 3471 Nickel 50 22 171 0COL 201 OXY USA, INC. 1381 Chlorine 1,717 1,470 0SC 52517 REXAM PLC, REXAM BEVERA 3411 EGBE Y 112,016 959 0SB 1536 GRANITE - BUELLTON 2951 Nickel 48 21 164 0PLA 44 RIO-BRAVO 4911 Nickel Y 46 20 158 0SC 132954 ALL AMERICAN ASPHALT 2951 Nickel 45 20 156 0SC 140871 PAC RANCHO, INC. 3325 Nickel 44 19 149 0SC 800026 ULTRAMAR INC (NSR USE ONL 2911 Nickel Y 44 19 149 0MBU 1347 SOLEDAD ENERGY PARTNERS4911 HCl 15,242 290 0MOJ 1200003 TXI RIVERSIDE CEMENT COM 3241 Nickel 43 19 148 0SJU 228 DDRW TRACY SITE 9711 Chlorine 1,460 1,250 0COL 33 TRITON OIL & GAS CORP. 1381 Chlorine 1,459 1,250 0SD 6129 APPLIED MICRO CIRCUITS CO 3674 Sulfuric Acid 829 142 0SB 1735 CELITE CORPORATION 3295 Nickel 41 18 142 0SC 46268 CALIFORNIA STEEL INDUSTRIE3317 HCl Y 14,330 273 0SJU 50242 STOCKDALE OIL & GAS 1311 Nickel 41 18 140 0VEN 244 ARCTURUS MANUFACTURING 3463 Nickel 40 18 137 0SD 19 NATL STEEL & SHIPBUILDING 3731 Nickel Y 40 18 136 0VEN 22 HALACO ENGINEERING COMP 3341 Nickel Y 38 17 132 0SC 35302 OWENS CORNING 2952 Nickel Y 38 17 131 0MOJ 1.05E+08 RELIANT ENERGY 4911 Chlorine Y 1,316 1,127 0SD 478 SOUTHWEST MARINE INC 3731 Nickel Y 37 16 127 0SC 42645 BRITE PLATING CO INC 3471 Nickel 37 16 126 0SJU 247 MOBIL EXPLORATION AND PR 1311 HCl 12,772 243 0

2004

KER 28 U.S. BORAX 1474 Nickel Y 36 16 125 0SB 4421 UNION ASPHALT 2951 Nickel 36 16 123 0SJU 40123 INDUSTRIAL ASPHALT 2951 Chlorine 1,260 1,079 0KER 20 LEHIGH SOUTHWEST CEMENT 3241 HCl Y 12,440 237 0NS 10006026 SANTA ROSA GEOTHERMAL CO.4961 Nickel 35 15 120 0SAC 200 GRANITE CONSTRUCTION CO 2951 Nickel Y 35 15 120 0BUT 1005 OROVILLE HOSPITAL 8062 HCl 11,900 226 0SC 131249 BP WEST COAST PRODUCTS L 2999 Nickel 34 15 116 0NCU 59 P G & E-HUMBOLDT BAY PLAN 4911 Nickel Y 33 15 112 0SC 127468 GRANITE CONSTRUCTION CO 2951 Nickel 32 14 111 0IMP 54 AMERICAN GIRL MINE 1041 Nickel 31 14 106 0SHA 51 BURNEY FOREST PRODUCTS 2421 Nickel Y 31 14 106 0SC 124838 EXIDE TECHNOLOGIES 3341 Sulfuric AcidY 613 105 0SD 4845 USN NAV STA 1 SCE 9711 Nickel Y 30 13 103 0KER 572 RAND MINING COMPANY 1041 Nickel 30 13 102 0SD 96387 MINNESOTA METHANE SAN DIE4931 HCl Y 10,010 190 0BA 2371 USS-POSCO INDUSTRIES 3312 HCl Y 8,196 156 0MOJ 5400246 AEROCHEM INC 3728 Perc Y 74,598 748 365 0ED 27 SOUTH TAHOE PUB. UTILITY DI4952 Chlorine Y 778 666 0SC 800089 EXXONMOBIL OIL CORPORATI 2911 Chlorine Y 773 662 0SD 8717 SD CO OF PUB WKS SAN MARC4953 HCl Y 6,576 125 0SC 131732 NEWPORT FAB, LLC 3764 Chlorine 646 553 0COL 128 THE TERMO CO 1381 Chlorine Y 595 509 0BA 31 DOW CHEMICAL COMPANY 2879 HCl Y 5,907 112 0SC 800320 AMVAC CHEMICAL CORP 2879 HCl Y 5,591 106 0SJU 40115 GWF POWER SYSTEMS COMPA4911 HCl 5,508 105 0COL 50 MCGILL AND SHEPHERD 1381 Chlorine 540 462 0BA 148 BALL METAL BEVERAGE CONT3411 EGBE Y 34,510 295 0KER 21 NATIONAL CEMENT CO 3241 EpichlorohydY 3,001 117 171 0SJU 534 DOLE DRIED FRUIT & NUT CO. 2068 Methyl Brom 8,925 306 0YS 5 FARMERS' RICE COOPERATIV 2044 Methyl BromY 8,225 282 0FR 16004 SUNSWEET GROWERS INC. 723 Methyl BromY 8,070 276 0SC 117785 BALL METAL BEVERAGE CONT3411 EGBE Y 28,787 246 0SJU 1330 GREIF BROS. CORPORATION 3411 EGBE Y 27,223 233 0SD 7006 ISP ALGINATES INC 2833 Chlorine Y 389 333 0COL 22 MOBIL EXPLORATION & PROD 1381 Chlorine 370 317 0MOJ 19901418 HELENDALE WASTEWATER T 4952 Chlorine 360 308 0SJU 423 R-CLEANERS 7216 Perc 30,861 310 151 0SC 38971 RICOH ELECTRONICS INC 3579 Perc Y 29,820 299 146 0SJU 3076 SNOW CLEANERS INC 7216 Perc 29,592 297 145 0NSI 3 SIERRA PACIFIC INDUSTRIES 2421 Chlorine Y 298 255 0SJU 40139 J.R. SIMPLOT COMPANY 2819 Chlorine 285 244 0NSI 1 SIERRA PACIFIC INDUSTRIES 2421 Chlorine Y 266 228 0SJU 50069 DEXZEL, INC. 4911 Chlorine 244 209 0YS 36 PORT OF SACRAMENTO 4491 Methyl BromY 4,179 143 0SJU 20777 LODI METAL TECH INC 2542 EGBE 14,804 127 0SLO 13 CONOCO PHILLIPS SANTA MAR2911 Chlorine Y 219 188 0SHA 42 BURNEY MOUNTAIN POWER 4931 Chlorine Y 211 181 0SAC 201 SILGAN CAN COMPANY 3411 EGBE Y 13,669 117 0SJU 20653 J.R. SIMPLOT COMPANY 2873 Chlorine 200 171 0SC 800030 CHEVRON PRODUCTS CO. 2911 Chlorine Y 160 137 0COL 57 ABA ENERGY CORPORATION 1311 Chlorine 153 131 0SJU 50243 STYROTEK INC. 2821 Chlorine 149 127 0

2004

MOJ 9600500 BARSTOW, CITY OF - WWTP 4952 Chlorine Y 141 121 0SJU 50177 NAVAL PETROLEUM RESERVE 1311 Chlorine 141 121 0SC 6384 LA CO., RANCHO LOS AMIGOS 8062 Chlorine Y 132 113 0SJU 40017 CALIF STATE UNIVERSITY, FR 8221 Chlorine 129 110 0COL 114 PETSEC(AA PRODUCTION SER1311 Chlorine 129 110 0SHA 18 SIERRA PACIFIC IND. - BURNE 2421 Chlorine Y 122 104 0SJU 50234 SHELL WESTERN E&P INC. 1311 Phosphorus 2,112 5,166NS 10006021 SONOMA POWER PLANT 4911 Phosphorus Y 1,930 4,721SC 14833 SAINT JOHN'S HOSPITAL & H 8062 GlutaraldhydY 2,084 4,460ED 7 SIERRA PACIFIC INDUSTRIES 2421 Manganese Y 4,698 4,022NS 10006025 UNOCAL GEOTHERMAL DIVISI 4961 Phosphorus 1,174 2,872GBU 1 AMERICAN PERLITE COMPANY3295 Manganese Y 3,070 2,628SC 102075 FOAMEX INTERNATIONAL INC 3086 TolueneDiis Y 1,040 19 2,544SJU 247 MOBIL EXPLORATION AND PR 1311 Phosphorus 1,038 2,538MOJ 100005 CEMEX - BLACK MOUNTAIN Q 3241 Phosphorus Y 943 2,308IMP 47 NEW CHARLESTON POWER L.P4911 Phosphorus 926 2,265NS 10006004 GEYSERS POWER CO UNIT 5 4911 Manganese Y 2,569 2,199SC 131003 BP WEST COAST PROD.LLC BP2911 Beryllium Y 81 331 1,983TUO 1 SIERRA PACIFIC IND. STANDA 2421 Manganese Y 2,147 1,839SHA 44 DICALITE MINERALS CORPOR 1499 Manganese Y 2,130 1,824SJU 257 CHEVRON USA INC. 1311 Phosphorus 733 1,794NCU 60 PACIFIC LUMBER COMPANY, T 2421 Manganese Y 2,047 1,753MOJ 1200003 TXI RIVERSIDE CEMENT COM 3241 Manganese 2,025 1,733SLO 13 CONOCO PHILLIPS SANTA MAR2911 Manganese Y 1,917 1,641NS 10006005 GEYSERS POWER CO UNIT 6 4911 Manganese Y 1,276 1,092KER 9 CALIFORNIA PORTLAND CEME 3241 Beryllium Y 40 164 983SC 800327 GLENDALE CITY, PUBLIC SER 4931 Manganese 1,110 950NS 10006021 SONOMA POWER PLANT 4911 Cadmium Y 108 768 921GBU 3050309 COSO OPERATING COMPANY, 4961 Cadmium Y 106 754 905SJU 40125 INDUSTRIAL ASPHALT 2951 Manganese 1,049 898NSI 15 COLLINS PINE CO 2421 Manganese Y 1,013 867KER 9 CALIFORNIA PORTLAND CEME 3241 Manganese Y 996 853YS 5011 CALIFORNIA STATE PRISON- 9223 Phosphoric 34,799 851SJU 299 UNOCAL OIL & GAS DIVISION 1311 Phosphorus 342 836SHA 39 SIERRA PACIFIC IND. - SHASTA2421 Manganese Y 936 801KER 28 U.S. BORAX 1474 Manganese Y 926 793SC 45448 GAS RECOVERY SYST LLC (C 4911 Manganese Y 917 785PLA 28 SIERRAPINE LTD - ROCKLIN 2493 Manganese Y 859 735NS 10006021 SONOMA POWER PLANT 4911 Beryllium Y 30 122 729SC 114847 FOAMEX L.P. 3086 T-2,4-diisoc Y 296 6 724TUO 12 PACIFIC-ULTRAPOWER CHINE 4911 Manganese Y 815 698SC 99119 INTERPLASTIC CORP 2821 Maleic AnhydY 2,729 668VEN 137 WESTERN FARM SERVICE 7389 Phosphorus 268 656SC 800089 EXXONMOBIL OIL CORPORATI 2911 Cadmium Y 74 531 637PLA 44 RIO-BRAVO 4911 Manganese Y 738 632SB 1735 CELITE CORPORATION 3295 Acetaldehyd 33,130 152 630MOJ 100005 CEMEX - BLACK MOUNTAIN Q 3241 Cadmium Y 73 522 626LAS 4 SIERRA PACIFIC IND 2421 Manganese 710 608MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Beryllium Y 25 101 608IMP 65 PLANT EAST MESA UNIT 1 4911 Phosphorus Y 239 584BA 11693 FOAMEX, L P 3086 TolueneDiis 234 4 572SC 800030 CHEVRON PRODUCTS CO. 2911 Phosphorus Y 214 523SJU 40032 CHEVRON - COALINGA/KETTL 1311 Phosphorus 213 522

2004

SC 800181 CALIFORNIA PORTLAND CEMEN3241 Cadmium Y 60 426 510SC 131003 BP WEST COAST PROD.LLC BP2911 Cadmium Y 59 422 506SC 800089 EXXONMOBIL OIL CORPORATI 2911 Manganese Y 585 501LAS 16 MT. LASSEN POWER 4931 Manganese Y 575 492NS 10006012 GEYSERS POWER CO UNIT 14 4911 Manganese Y 569 487SC 800149 US BORAX INC 3299 Cadmium Y 56 401 481NS 10006011 GEYSERS POWER CO UNIT 12 4911 Manganese Y 532 455SJU 20890 NEWARK SIERRA PAPERBOAR 2621 Phosphorus 176 432SD 88196 SAN DIEGO CITY OF MIRAMAR 4953 Manganese Y 473 405SC 8936 FLEETWOOD MOTOR HOMES O3799 MeDiphenDiiY 1,648 403SAC 67 BLUE DIAMOND GROWERS 2099 Phosphine Y 1,878 402SC 4344 KUSTOM FIT MFG CO 2531 T-2,4-diisoc 147 3 359SJU 20528 GENERAL MILLS, INC. 2043 Phosphorus 146 358SJU 50234 SHELL WESTERN E&P INC. 1311 Beryllium 15 59 356SC 114847 FOAMEX L.P. 3086 T-2,6-diisoc Y 145 3 355SC 800363 CONOCOPHILLIPS COMPANY 2911 Manganese Y 413 353NSI 1 SIERRA PACIFIC INDUSTRIES 2421 Manganese Y 410 351SJU 20921 OWENS-BROCKWAY GLASS CO3221 Cadmium 41 292 350SJU 50140 M.H. WHITTIER, CORPORATIO 1311 Beryllium 13 55 328BUT 43 PACIFIC COAST PRODUCERS 2033 ChlorineDiox 1,136 324TUO 15 SIERRA PACIFIC IND. (CHINES 2421 Manganese Y 363 310YS 36 PORT OF SACRAMENTO 4491 Manganese Y 361 309SC 800030 CHEVRON PRODUCTS CO. 2911 Cadmium Y 35 251 301SC 800370 EQUILON ENTER., LLC, SHELL 2911 Manganese Y 350 299KER 572 RAND MINING COMPANY 1041 Manganese 344 294NS 10006007 GEYSERS POWER CO UNIT 8 4911 Manganese Y 334 286SJU 40208 SANTA FE ENERGY RESOURCE1311 Phosphorus 115 283SC 800089 EXXONMOBIL OIL CORPORATI 2911 Beryllium Y 11 47 280BA 62 AMERICAN BRASS & IRON FO 3321 Manganese Y 318 273NS 10006026 SANTA ROSA GEOTHERMAL CO.4961 Phosphorus 110 269VEN 36 PACIFIC CUSTOM MATERIALS 3259 Phosphorus Y 110 268IMP 54 AMERICAN GIRL MINE 1041 Cadmium 31 221 265BA 703 PACIFIC STEEL CASTING CO- 3325 Manganese Y 308 264MOJ 500364 MOLYCORP, INC. 1099 Manganese 299 256SJU 15 WESTERN COTTON SERVICES 2074 Cadmium 29 210 252NS 10006006 GEYSERS POWER CO UNIT 7 4911 Manganese Y 295 252NCU 59 P G & E-HUMBOLDT BAY PLAN 4911 Phosphorus Y 102 248NS 10006016 GEYSERS POWER CO UNIT 20 4911 Manganese Y 289 247FR 9999 BEALE AFB FACILITY WIDE 9711 Manganese Y 288 246SJU 41 ANDERSON CLAYTON CORP/OI2074 Cadmium 29 205 245MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Cadmium Y 28 203 243MBU 1186 CEMEX - CEMENT PLANT 3241 Phosphorus 99 242MOJ 1E+09 LEAD MASTERS 3341 Manganese 280 240SJU 50308 TEXACO USA, VENTURA PROD 1311 Acetaldehyd 12,451 57 237SHA 51 BURNEY FOREST PRODUCTS 2421 Manganese Y 276 236IMP 67 PLANT EAST MESA UNIT 2 4911 Phosphorus 96 236NSI 1 SIERRA PACIFIC INDUSTRIES 2421 Cadmium Y 27 193 231BA 12626 VALERO REFINING COMPANY -2911 Manganese Y 267 229SC 131003 BP WEST COAST PROD.LLC BP2911 Manganese Y 260 223SJU 40028 CHAMPION PARTS WESTERN D3714 Cadmium 26 185 222NS 10006014 GEYSERS POWER CO UNIT 17 4911 Manganese Y 257 220SC 800026 ULTRAMAR INC (NSR USE ONL 2911 Phosphorus Y 90 220SC 14495 VISTA METALS CORPORATION 3341 Manganese Y 249 213

2004

SC 8547 QUEMETCO INC 3341 Cadmium Y 24 172 207SD 19 NATL STEEL & SHIPBUILDING 3731 Manganese Y 236 202VEN 137 WESTERN FARM SERVICE 7389 Manganese 235 201BUT 45 WEHAH FARMS, INC. 723 Manganese Y 228 195PLA 43 LAUSMANN LUMBER & MOULDI2431 Manganese Y 228 195COL 55 WADHAM ENERGY LTD PARTN 4931 Cadmium Y 22 159 190SJU 20890 NEWARK SIERRA PAPERBOAR 2621 Cadmium 22 159 190KER 20 LEHIGH SOUTHWEST CEMENT 3241 Manganese Y 221 189VEN 445 CAMARILLO SANITARY DISTRI 4952 Phosphorus 77 189TUO 1 SIERRA PACIFIC IND. STANDA 2421 Cadmium Y 22 155 186BA 12626 VALERO REFINING COMPANY -2911 Cadmium Y 22 154 185NSI 3 SIERRA PACIFIC INDUSTRIES 2421 Manganese Y 214 183KER 21 NATIONAL CEMENT CO 3241 Phosphorus Y 74 182VEN 144 LOS ROBLES HOSPITAL 8062 GlutaraldhydN 84 179BUT 2 BUTTE COUNTY RICE GROWE 723 Beryllium Y 7 30 179SJU 50140 M.H. WHITTIER, CORPORATIO 1311 Glutaraldhyd 81 174SJU 713 PARAMOUNT KING LLC 723 Phosphine 801 171NSI 52 SIERRA AGGREGATES 1442 Beryllium 7 28 171SC 800327 GLENDALE CITY, PUBLIC SER 4931 Cadmium 20 141 169SC 800030 CHEVRON PRODUCTS CO. 2911 DieselExhP Y 4,729 2,412 162NS 10006015 GEYSERS POWER CO UNIT 18 4911 Beryllium Y 7 27 162GLE 14 GLENN GROWERS 723 Manganese Y 188 161YS 5 FARMERS' RICE COOPERATIV 2044 Manganese Y 187 160SJU 40032 CHEVRON - COALINGA/KETTL 1311 Beryllium 6 26 157SJU 122 MALIBU BOATS WEST, INC. 3732 MeDiphenDii 641 157SC 131249 BP WEST COAST PRODUCTS L 2999 Cadmium 18 131 157SJU 10427 GALLO GLASS COMPANY 3221 Cadmium Y 18 130 155NS 10006026 SANTA ROSA GEOTHERMAL CO.4961 Manganese 177 152NS 10006006 GEYSERS POWER CO UNIT 7 4911 Beryllium Y 6 24 147SJU 50234 SHELL WESTERN E&P INC. 1311 Manganese 167 143SC 45448 GAS RECOVERY SYST LLC (C 4911 Cadmium Y 17 119 143FR 9999 BEALE AFB FACILITY WIDE 9711 Beryllium Y 6 24 141YS 6 PIRMI 2044 Manganese Y 163 140VEN 22 HALACO ENGINEERING COMP 3341 Manganese Y 161 137VEN 1139 VENTURA PORT DISTRICT 1629 DieselExhP Y 4,010 2,045 137MBU 1186 CEMEX - CEMENT PLANT 3241 Acetaldehyd 7,160 33 136KER 20 LEHIGH SOUTHWEST CEMENT 3241 Cadmium Y 16 113 136NS 10006014 GEYSERS POWER CO UNIT 17 4911 Beryllium Y 6 23 136SC 68042 CORONA ENERGY PARTNERS, 4931 GlutaraldhydY 63 135SHA 43 WHEELABRATOR SHASTA E.C.I4931 Manganese Y 154 132SC 800026 ULTRAMAR INC (NSR USE ONL 2911 Acetaldehyd Y 6,844 31 130KER 572 RAND MINING COMPANY 1041 DieselExhP 3,783 1,929 130SJU 257 CHEVRON USA INC. 1311 Beryllium 5 21 127LAS 15 H.L. POWER COMPANY 4931 Phosphorus Y 51 126SC 68838 A 2 Z PLATING CO 3471 Cadmium 15 104 124SJU 20387 DIAMOND WALNUT GROWERS, 5145 Cadmium Y 14 103 123NS 10006016 GEYSERS POWER CO UNIT 20 4911 Beryllium Y 5 20 122IMP 47 NEW CHARLESTON POWER L.P4911 Manganese 141 121SJU 40128 J.G. BOSWELL OIL MILL 723 Cadmium 14 100 119NS 10006028 NORTHERN CALIFORNIA POW 4961 Manganese 138 118NS 10006004 GEYSERS POWER CO UNIT 5 4911 Beryllium Y 5 20 117SD 19 NATL STEEL & SHIPBUILDING 3731 Cadmium Y 14 97 116SJU 50140 M.H. WHITTIER, CORPORATIO 1311 Cadmium 13 96 115

2004

SJU 285 DIAMOND WALNUT GROWERS, 723 Phosphine Y 535 115SC 131003 BP WEST COAST PROD.LLC BP2911 Acetaldehyd Y 5,882 27 112BA 10 CHEVRON PRODUCTS COMPA 2911 Manganese Y 131 112SC 68996 HONEYWELL TURBO TECHNOL3714 DieselExhP 3,250 1,658 111SJU 285 DIAMOND WALNUT GROWERS, 723 Cadmium Y 13 92 110BUT 21 SUNWEST MILLING CO. INC 723 Manganese 128 110SJU 15 WESTERN COTTON SERVICES 2074 Beryllium 4 18 110SAC 1028 THE PALM IRON & BRIDGE W 3441 Manganese 128 109SJU 50002 ARCO OIL AND GAS COMPANY 1311 Phosphorus 45 109SC 124838 EXIDE TECHNOLOGIES 3341 Cadmium Y 13 91 109NSI 3 SIERRA PACIFIC INDUSTRIES 2421 Cadmium Y 13 91 109YS 256 VERTIS, INC. 2752 GlutaraldhydY 50 108SJU 41 ANDERSON CLAYTON CORP/OI2074 Beryllium 4 18 107SC 800189 DISNEYLAND RESORT 7996 MeDiphenDiiY 429 105NS 10006025 UNOCAL GEOTHERMAL DIVISI 4961 Bromine 1,010 102MOJ 100005 CEMEX - BLACK MOUNTAIN Q 3241 Manganese Y 119 102PLA 44 RIO-BRAVO 4911 Cadmium Y 12 84 101NS 10006010 GEYSERS POWER CO UNIT 11 4911 Manganese Y 117 101KER 28 U.S. BORAX 1474 DieselExhP Y 2,835 1,446 97AV 1.18E+08 MOUNTAIN HIGH SKI AREA WE 7999 DieselExhP Y 2,358 1,203 81AV 1.23E+08 LANCASTER LANDFILL AND R 9511 DieselExhP 2,324 1,185 80SC 800026 ULTRAMAR INC (NSR USE ONL 2911 DieselExhP Y 2,305 1,175 79SC 800370 EQUILON ENTER., LLC, SHELL 2911 DieselExhP Y 2,170 1,107 74VEN 41 AERA ENERGY LLC 1311 DieselExhP Y 1,985 1,013 68SJU 21419 THE WINE GROUP INC 2084 Cr(VI) 15 3,726 13SC 100154 COLMAC ENERGY INC 4911 Cr(VI) 12 2,958 10SD 99 ROHR INC 3728 Cr(VI) Y 9 2,331 8SC 141878 SWIFT-COR AEROSPACE INC 3444 Cr(VI) 9 2,327 8SC 9496 BENDER MACHINE, INC. 3599 Cr(VI) Y 7 1,902 6SC 136913 MORRELL'S ELECTRO PLATING3471 Cr(VI) 7 1,862 6SJU 50234 SHELL WESTERN E&P INC. 1311 Cr(VI) 7 1,763 6IMP 47 NEW CHARLESTON POWER L.P4911 Cr(VI) 6 1,530 5KER 20 LEHIGH SOUTHWEST CEMENT 3241 Cr(VI) Y 5 1,363 5SJU 566 LIQUID WASTE MANAGEMENT, 4953 Cr(VI) 5 1,301 4ED 7 SIERRA PACIFIC INDUSTRIES 2421 Cr(VI) Y 4 1,097 4KER 21 NATIONAL CEMENT CO 3241 Cr(VI) Y 4 1,075 4SJU 477 PILKINGTON NORTH AMERICA,3211 Cr(VI) Y 4 1,071 4SJU 40026 CERTAINTEED CORPORATION 3296 Cr(VI) Y 4 1,024 3SJU 20755 LIBBEY-OWENS-FORD CO. 3211 Cr(VI) 4 1,023 3SHA 44 DICALITE MINERALS CORPOR 1499 Cr(VI) Y 4 1,015 3AV 1.16E+08 FRESH AIR ENVIRONMENTAL 1742 Asbestos 43 4,607SJU 50118 CALMAT- INDUSTRIAL ASPHAL 2951 Asbestos 28 3,049SC 131003 BP WEST COAST PROD.LLC BP2911 Asbestos Y 27 2,939SJU 40123 INDUSTRIAL ASPHALT 2951 Asbestos 26 2,816SC 42630 PRAXAIR INC 2813 Asbestos Y 15 1,561AV 52002088 METALCLAD INSULATION COR 1795 Asbestos 13 1,443

2001DIS FACID FNAME FSIC POLABBREV CHTEMS CANCER_CHRONICACUTE maxTUO 13 SONORA MINING CORP. 1041 Asbestos 2,026 218,100 218,100SJU 625 CALMAT CO. 1446 Asbestos 1,647 177,336 177,336SC 29416 GREAT WESTERN BANK 6035 Chlorine 92,600 79,281 8 79,281SJU 50234 SHELL WESTERN E&P INC. 1311 Nickel 15,248 6,739 52,218 44 52,218SJU 211 CHEMEX INC 723 Nickel 12,012 5,309 41,138 34 41,138SC 74696 TRW TECHNAR INC 3679 Beryllium 1,608 6,561 39,335 39,335NS 10006011 GEYSERS POWER CO UNIT4911 Phosphorus Y 13,249 32,409 32,409SJU 40032 CHEVRON - COALINGA/KE 1311 Nickel 8,236 3,640 28,204 24 28,204FR 9999 B. AFB FAC WIDE 9711 Nickel Y 7,021 3,103 24,045 20 24,045SC 800074 LA CITY, DWP HAYNES GE 4911 Asbestos Y 199 21,424 21,424SJU 257 CHEVRON USA INC. 1311 Nickel 6,194 2,738 21,212 18 21,212SC 15549 A J INDUSTRIES INC, SAR 3728 Cr(VI) 78 19,890 67 19,890SC 22551 THUMS LONG BEACH CO, U1311 Glutaraldhyd Y 7,950 17,016 17,016SC 20451 INTER-COMMUNITY MEDIC 8011 Glutaraldhyd 7,270 15,561 15,561SJU 50140 M.H. WHITTIER, CORPORA 1311 Nickel 4,501 1,989 15,413 13 15,413SC 800362 TOSCO REFINING COMPA 2911 Asbestos Y 141 15,176 15,176SC 69199 BWD CORPORATION 3714 Asbestos 130 14,040 14,040GBU 3050309 COSO OPERATING COMPAN4961 H2S Y 810,800 13,884 331 13,884KER 47 EDWARDS AIR FORCE BAS9711 Asbestos Y 126 13,535 13,535SC 46903 CHATSWORTH PLATING C 3471 StrontiumChr 205 13,069 44 13,069MOJ 900002 IMC CHEMICALS, INC. 2819 H2S Y 758,016 12,980 309 12,980SC 3875 LA CITY, DWP 4941 Cr(VI) 50 12,842 43 12,842SC 6012 MCDONNELL DOUGLAS HE3721 Cr(VI) 49 12,521 42 12,521FR 19 SANTA FE MINERALS INC. 1311 Cr(VI) 49 12,465 42 12,465SJU 10316 DEL MONTE USA PLANT #12033 Cr(VI) 46 11,626 39 11,626SC 20564 PACIFIC CLAY PRODUCTS 3255 T-2,4-diisocya Y 4,734 89 11,580 11,580GBU 5 DESERT AGGREGATES 2951 Cr(VI) Y 42 10,721 36 10,721SC 9729 PGP INDUSTRIES INC 3341 Hydrazine 1,250 10,413 1,070 10,413NCU 59 P G & E-HUMBOLDT BAY P 4911 Nickel Y 2,975 1,315 10,190 8 10,190SC 23589 INTERNATIONAL EXTRUSIO3354 Cr(VI) 39 10,012 34 10,012MBU 25 DUKE ENERGY MOSS LAND4911 Nickel Y 2,817 1,245 9,647 8 9,647SC 122300 BASF CORPORATION 2851 Cr(VI) Y 37 9,494 32 9,494SJU 257 CHEVRON USA INC. 1311 H2S 536,912 9,194 219 9,194SC 40328 COOPER DRUM COMPANY 5085 Cr(VI) 36 9,102 31 9,102MBU 30 CHEVRONTEXACO 1311 Nickel Y 2,636 1,165 9,029 8 9,029MEN 100119 MASONITE HARDBRD DIV 2499 Cr(VI) 35 8,925 30 8,925SC 800089 MOBIL OIL CORP 2911 Asbestos Y 82 8,837 8,837SC 25786 SEVEN-UP/ROYAL CROWN 2086 Chlorine 10,050 8,604 1 8,604SJU 40208 SANTA FE ENERGY RESOU1311 Nickel 2,453 1,084 8,402 7 8,402SB 12 CELITE CORPORATION 3295 Acrolein Y 2,940 8,391 265 8,391SC 800150 US GOVT., AF DEPT, MAR 9711 2,3,7,8-TCDD Y 0 7,868 521 7,868IMP 49 J.J. ELMORE 4911 H2S 367,088 6,286 150 6,286NS 10006028 NORTHERN CALIFORNIA 4961 Arsenic 1,052 5,900 6,003 95 6,003KER 21 NATIONAL CEMENT CO 3241 Arsenic Y 898 5,035 5,123 81 5,123SJU 247 MOBIL EXPLORATION AND 1311 H2S 252,547 4,324 103 4,324NS 10006010 GEYSERS POWER CO UNIT4911 H2S Y 222,202 3,805 91 3,805NS 10006011 GEYSERS POWER CO UNIT4911 H2S Y 211,553 3,622 86 3,622KER 572 RAND MINING COMPANY 1041 Arsenic 631 3,538 3,600 57 3,600SJU 1130 CHEVRON U S A INC 1311 H2S 202,140 3,461 82 3,461SHA 164 PACIFIC GAS & ELECTRIC 4922 Acrolein Y 945 2,697 85 2,697SB 4214 ORCUTT HILL IC ENGINES 1311 Acrolein Y 911 2,600 82 2,600YS 45 TYCO PLASTICS 3081 Acrolein 803 2,293 72 2,293NS 10006006 GEYSERS POWER CO UNIT4911 H2S Y 133,764 2,290 55 2,290SC 24812 FARMER BROS CO 2095 Acrolein Y 774 2,209 70 2,209NCU 37 SAMOA-PACIFIC CELLULOS2611 Sodium Hydro Y 60,819 2,170 130 2,170

2001MOJ 18869 SO CAL GAS CO 4924 Acrolein 746 2,128 67 2,128SC 74696 TRW TECHNAR INC 3679 Sodium Hydro 36,841 1,314 79 1,314NS 10006018 NCPA UNIT 2 4911 Arsenic Y 603 3,384 3,443 54MOJ 3101437 SOUTHERN CALIFORNIA G 4922 Acrolein Y 558 1,593 50MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Arsenic Y 545 3,057 3,111 49NS 10006007 GEYSERS POWER CO UNIT4911 H2S Y 115,690 1,981 47SJU 1737 VINTAGE PETROLEUM INC 1311 Acrolein Y 492 1,403 44MOJ 3100068 SOUTHERN CALIFORNIA G 4923 Acrolein Y 485 1,385 44SJU 1820 RIO BRAVO FRESNO 4931 Acrolein Y 448 1,279 40IMP 45 EARTH ENERGY, INC. 4911 H2S 96,155 1,646 39NS 10006025 UNOCAL GEOTHERMAL DIV4961 H2S 95,652 1,638 39NS 10006009 GEYSERS POWER CO UNIT4911 H2S Y 84,352 1,444 34SB 3831 CAT CANYON IC ENGINES 1311 Acrolein Y 367 1,048 33SC 1756 FANSTEEL INC. PRECISIO 3728 Sodium Hydro 15,437 551 33SJU 50305 MOBIL 1311 Acrolein 353 1,008 32MOJ 3100065 SOUTHERN CALIFORNIA G 4922 Acrolein Y 353 1,008 32SB 1734 LA GOLETA 4922 Acrolein Y 340 971 31SB 8013 PLATFORM HARVEST 1311 Acrolein Y 335 956 30VEN 41 AERA ENERGY LLC 1311 Acrolein Y 327 933 29IMP 54 AMERICAN GIRL MINE 1041 Arsenic 325 1,823 1,855 29LAK 290 CALPINE - CALISTOGA G 4911 H2S Y 66,870 1,145 27SJU 50308 TEXACO USA, VENTURA P 1311 H2S 66,009 1,130 27SB 27 CARPINTERIA GAS PLANT 1311 Acrolein Y 297 848 27SJU 50306 MOBIL 1311 Acrolein 288 822 26KER 20 LEHIGH SOUTHWEST CEME3241 Mercury Y 2,593 4,933 25NS 10006020 NCPA UNIT 4 4911 H2S Y 59,183 1,013 24SC 2405 NI INDUSTRIES, INC.,NORR3483 Sodium Hydro 10,911 389 23KER 28 U.S. BORAX 1474 As cmpd(inorgY 259 1,452 1,477 23SD 94 USN NORTH ISLAND 9711 Acrolein Y 246 703 22SJU 1633 BAKER PETROLITE CORPO2879 Acrolein Y 244 696 22NS 10006004 GEYSERS POWER CO UNIT4911 H2S Y 53,170 910 22NS 10006016 GEYSERS POWER CO UNIT4911 H2S Y 50,828 870 21SC 57311 HUCK INTERNATIONAL, IN 3452 Sodium Hydro 9,600 342 21SC 800127 THE GAS CO. 20 Acrolein Y 224 639 20SB 8916 HALLADOR IC ENGINES 1311 Acrolein Y 218 622 20SB 3721 LOS ALAMOS ENERGY, L.L.4911 Acrolein 218 622 20SC 5973 SOUTHERN CALIFORNIA 4923 Acrolein Y 216 616 19NS 10006005 GEYSERS POWER CO UNIT4911 H2S Y 46,056 789 19BA 591 EAST BAY MUNICIPAL UTIL4952 Acrolein Y 205 584 18SC 14833 SAINT JOHN'S HEALTH CE 8062 Sodium Hydro Y 8,427 301 18SJU 50054 CITY OF TULARE 9511 H2S 43,990 753 18NS 10006008 GEYSERS POWER CO UNIT4911 H2S Y 43,800 750 18SC 37045 INDUSTRIAL CHEM PROD./ 2899 Sodium Hydro 8,160 291 17SJU 2149 CHEVRON USA PRODUCTI 1311 Acrolein 193 552 17NS 10006012 GEYSERS POWER CO UNIT4911 H2S Y 42,658 730 17SC 24755 PACIFIC AIRMOTIVE CORP 4581 Acrolein 193 550 17SB 8014 PLATFORM HERMOSA 1311 Acrolein Y 191 544 17SC 17473 MECH METAL FINISHING CO 3599 Sodium Hydro Y 7,985 285 17IMP 43 HEBER GEOTHERMAL 4911 H2S Y 41,670 714 17SB 8012 PLATFORM HABITAT 1311 Acrolein Y 186 529 17SJU 211 CHEMEX INC 723 Arsenic 180 1,012 1,029 16SB 1708 LOMPOC WWT PLANT 4952 Acrolein Y 177 504 16NS 10006015 GEYSERS POWER CO UNIT4911 H2S Y 38,973 667 16SC 102684 HUCK INTERNATIONAL - D 3451 Sodium Hydro 7,414 264 16SC 800128 SOUTHERN CALIFORNIA 4923 Acrolein Y 175 499 16MOJ 104801880 RELIANT ENERGY 4911 FormaldehydeY 85,542 873 4,883 16

2001SB 12 CELITE CORPORATION 3295 FormaldehydeY 83,909 856 4,789 15SC 800325 TIDELANDS OIL PRODUCTION1311 Acrolein Y 168 478 15SC 14759 RIVERSIDE CEMENT CO UN3255 Arsenic 165 928 945 15SJU 311 CHEVRON USA INC 1311 Acrolein Y 158 451 14SC 8724 CAL BUMPER CO INC 3471 Sodium Hydro 6,494 232 14SC 62589 SUNCLIPSE INC, CORRU-KR2653 Acrolein 151 431 14IMP 53 PLANT EAST MESA PEM UN4911 H2S 32,866 563 13GLE 1000 JOHNS-MANVILLE 3296 FormaldehydeY 71,649 731 4,090 13SC 104017 AERA ENERGY LLC 1311 Acrolein Y 144 411 13SJU 50308 TEXACO USA, VENTURA P 1311 Acrolein 143 408 13SJU 257 CHEVRON USA INC. 1311 Acrolein 142 406 13TUO 13 SONORA MINING CORP. 1041 Arsenic 140 787 801 13TUO 1 SIERRA PACIFIC IND. STA 2421 Arsenic Y 140 785 799 13SC 5960 HKM OF CALIFORNIA KRAS3714 Acrolein 140 398 13SJU 40164 PIRELLI ARMSTRONG TIR 3011 Acrolein 136 388 12SJU 2149 CHEVRON USA PRODUCTI 1311 Formaldehyde 65,150 665 3,719 12SB 8015 PLATFORM HIDALGO 1311 Acrolein Y 131 374 12MOJ 18869 SO CAL GAS CO 4924 Formaldehyde 64,049 653 3,656 12MOJ 3100069 SOUTHERN CALIFORNIA G 4922 Acrolein Y 127 361 11NS 10006018 NCPA UNIT 2 4911 H2S Y 26,947 461 11IMP 45 EARTH ENERGY, INC. 4911 Arsenic 120 674 686 11SJU 50147 MCFARLAND ENERGY, INC 1311 Acrolein 119 340 11SC 1836 UNION OIL CO OF CALIFOR1311 Acrolein 119 339 11SJU 37 KERN OIL & REFINING CO 2911 Acrolein Y 117 334 11SB 3170 POPCO 1311 Acrolein Y 116 330 10SC 24755 PACIFIC AIRMOTIVE CORP 4581 Sodium Hydro 4,587 164 10SB 4216 CASMALIA IC ENGINES 1311 Acrolein Y 109 310 10BA 12626 VALERO REFINING COMPAN2911 H2S Y 23,792 407 10SJU 40026 CERTAINTEED CORPORAT 3296 FormaldehydeY 52,888 539 3,019 10BA 12758 ULTRAMAR INC 2911 H2S Y 23,216 398 9SJU 50178 NAVAL PETROLEUM RESER1311 Formaldehyde 51,007 520 2,911 9SJU 40224 SHELL WESTERN E & P INC1311 Acrolein 101 289 9SC 24046 ORCO BLOCK CO INC 3271 Sodium Hydro 4,219 151 9SC 800134 SUN EXPLORATION & PROD1311 Acrolein 99 284 9SC 10018 PACIFIC COAST DRUM CO 5085 Sodium Hydro 4,025 144 9SJU 50234 SHELL WESTERN E&P INC. 1311 Arsenic 94 529 538 8SJU 211 CHEMEX INC 723 H2S 20,647 354 8SJU 40149 M.H. WHITTIER CORPORAT1311 H2S 19,794 339 8MBU 19 AERA ENERGY LLC 1311 H2S Y 19,530 334 8SB 9545 UNION SUGAR - ICE 1311 Acrolein Y 87 247 8VEN 36 PACIFIC CUSTOM MATERI 3259 Acrolein Y 85 244 8SJU 50046 CHEVRON USA LOST HILLS1321 Acrolein 84 240 8SB 12 CELITE CORPORATION 3295 Arsenic Y 82 459 467 7SC 4242 SAN DIEGO GAS & ELECTR4931 Acrolein Y 81 231 7SC 42333 AMERICAN NATIONAL CAN 3471 Arsenic 81 454 462 7SD 79 CABRILLO POWER II LLC 4911 Arsenic Y 80 451 459 7SJU 50049 CHEVRON WARREN GP 1321 Acrolein 80 228 7SJU 50140 M.H. WHITTIER, CORPORA 1311 H2S 17,392 298 7NS 10006024 AIDLIN GEOTHERMAL PRO 4911 H2S Y 17,365 297 7IMP 49 J.J. ELMORE 4911 Arsenic 77 432 440 7NS 10006026 SANTA ROSA GEOTHERMAL 4961 H2S 17,025 292 7SC 800103 POWERINE OIL CO (EIS USE)2911 Acrolein 77 219 7SJU 50002 ARCO OIL AND GAS COMP 1311 Arsenic 76 427 435 7SC 800241 SHELL WESTERN E&P INC 1311 Acrolein 75 214 7SB 4218 LOMPOC IC ENGINES 1311 Acrolein Y 74 212 7SC 43759 LA CO., METROPOLITAN T 4119 Sodium Hydro 3,077 110 7

2001IMP 44 VULCAN GEOTHERMAL 4911 Ammonia ### 1,052 7BA 16 PHILLIPS 66 COMPANY - S 2911 FormaldehydeY 35,691 364 2,037 7SC 113518 BREA POWER PARTNERS, L4911 FormaldehydeY 35,647 364 2,035 6SB 3200 TOGNAZZINI LEASE (GATO1311 Acrolein Y 72 205 6SJU 91 MT POSO COGENERATION 4931 Acrolein Y 72 204 6SJU 40042 CITY OF FRESNO, PUBLIC 4952 H2S 15,800 271 6SC 8206 ENTERPRISE SALES CO. 2899 Sodium Hydro 3,000 107 6SJU 50303 CHEVRON U.S.A. PRODUCT1311 Acrolein 70 200 6SLO 24 CAL POLY STATE U 9223 Acrolein Y 69 198 6SC 800045 HENKEL CORP., EMERY G 2899 Nickel 2,189 968 7,497 6SJU 299 UNOCAL OIL & GAS DIVISI 1311 Nickel 2,186 966 7,485 6SB 4007 GAVIOTA TRANSPORTATI 1311 Acrolein Y 69 197 6SB 8013 PLATFORM HARVEST 1311 FormaldehydeY 34,156 348 1,950 6MOJ 8600591 USMC MAGTFTC MCAGCC 9711 Acrolein Y 68 195 6SJU 247 MOBIL EXPLORATION AND 1311 Nickel 2,140 946 7,328 6SC 8582 SOUTHERN CALIFORNIA G 4923 Acrolein Y 67 192 6MOJ 1500535 PG&E HINKLEY COMPRES 4922 Acrolein Y 65 185 6KER 21 NATIONAL CEMENT CO 3241 Mercury Y 611 1,162 6SJU 33 EQUILON ENTERPRISES L 2911 Acrolein Y 63 180 6BA 2180 GAYLORD CONTAINER CO 4931 FormaldehydeY 31,201 318 1,781 6SAC 194 SACRAMENTO POWER AUT4911 Acrolein Y 63 180 6IMP 72 SALTON SEA POWER GEN/4911 Ammonia ### 888 6SB 4212 SMV EAST IC ENGINES 1311 Acrolein Y 62 176 6SJU 50047 CHEVRON USA 17Z NA GAS1321 Acrolein 60 171 5SAC 195 SACRAMENTO COGENERAT4911 Acrolein Y 59 169 5SJU 50282 VICTORY OIL COMPANY 1311 H2S 13,052 223 5SB 4005 ZACA AREA IC ENGINES 1311 Acrolein Y 59 168 5MBU 30 CHEVRONTEXACO 1311 H2S Y 13,025 223 5BA 778 SAN JOSE/SANTA CLARA 4953 H2S Y 12,910 221 5SJU 1127 CHEVRON USA INC 1311 Acrolein Y 57 163 5SJU 20929 PACIFIC ENERGY 4911 Acrolein 57 161 5SC 23907 JOHNS MANVILLE INTERNA3296 FormaldehydeY 27,011 276 1,542 5SJU 257 CHEVRON USA INC. 1311 Formaldehyde 26,531 271 1,514 5SC 17842 BANDAG, INCORPORATED 3011 Acrolein Y 53 150 5SC 800236 LA CO., SANITATION DIST 4952 Acrolein Y 52 148 5KER 572 RAND MINING COMPANY 1041 HCN 92,124 1,753 5SC 8086 BAKER COMMODITIES INC 2077 Acrolein 51 146 5SB 4204 CLARK AVENUE IC ENGIN 1311 Acrolein 51 146 5SC 74696 TRW TECHNAR INC 3679 Nickel 1,608 711 5,507 5LAK 50 CALPINE - WEST FORD FL 4911 H2S Y 11,200 192 5BA 778 SAN JOSE/SANTA CLARA 4953 Ammonia Y 842,022 721 5SJU 40139 J.R. SIMPLOT COMPANY 2819 Ammonia 838,549 718 4SC 17749 ST CALIF DEPT CORRECTI 8361 Acrolein 49 140 4BA 148 BALL METAL BEVERAGE C 3411 EGEE Y 94,153 230 4VEN 951 SANTA FE ENG OPER PARTN1311 Acrolein 48 137 4SC 21887 KIMBERLY CLARK WORLDW2621 Acrolein Y 48 137 4MEN 100119 MASONITE HARDBRD DIV 2499 Acrolein 46 132 4SC 800189 DISNEYLAND RESORT 7996 Acrolein Y 46 130 4NS 10006020 NCPA UNIT 4 4911 Ammonia Y 749,090 641 4SC 800030 CHEVRON U.S.A. INC. 2911 FormaldehydeY 21,832 223 1,246 4VEN 445 CAMARILLO SANITARY DIS 4952 H2S 9,674 166 4VEN 33 LA CONCHITA OIL & GAS 1311 Acrolein Y 43 123 4SJU 50256 TEXACO - BAKERSFIELD DI1311 H2S 9,411 161 4NS 10006028 NORTHERN CALIFORNIA 4961 H2S 9,383 161 4IMP 51 J.M. LEATHERS 4911 Ammonia 706,075 605 4SB 1848 LOS FLORES IC ENGINES 1311 Acrolein Y 41 118 4

2001SJU 50140 M.H. WHITTIER, CORPORA 1311 Acrolein 41 117 4SC 4548 SUNLAW COGENERATION 4931 Formaldehyde 19,907 203 1,136 4IMP 47 NEW CHARLESTON POWER 4911 Ammonia 674,286 577 4SJU 1130 CHEVRON U S A INC 1311 Acrolein 40 113 4SLO 13 TOSCO SANTA MARIA REF 2911 Nickel Y 1,250 552 4,280 4MOJ 1500039 PG&E TOPOCK COMPRESS4922 Acrolein Y 40 113 4BA 11 MARTINEZ REFINING COMPA2911 FormaldehydeY 19,560 200 1,116 4SJU 247 MOBIL EXPLORATION AND 1311 Formaldehyde 19,244 196 1,098 4SC 7855 KNOTT'S BERRY FARM 7996 Acrolein 39 110 3BA 41 OWENS CORNING 4931 FormaldehydeY 18,908 193 1,079 3LAK 230 CALPINE UNIT 13: POWER 4911 Ammonia Y 642,000 550 3SJU 2149 CHEVRON USA PRODUCTI 1311 H2S 8,393 144 3SC 5973 SOUTHERN CALIFORNIA 4923 FormaldehydeY 18,675 190 1,066 3SB 2637 BLAIR LEASE 1311 Acrolein Y 37 105 3SJU 2133 REFINERIES SERVICE 1382 Acrolein 37 105 3SC 800116 SHELL OIL CO (EIS USE ON2911 H2S 8,082 138 3SC 800263 U.S. GOVT, DEPT OF NAVY 9711 Acrolein Y 36 104 3SJU 50997 MOBIL 1311 Acrolein 36 101 3SAC 106 REGIONAL SANITATION DI 4952 H2S 7,758 133 3PLA 28 SIERRAPINE LTD - ROCKLI 2493 FormaldehydeY 17,190 175 981 3SB 8014 PLATFORM HERMOSA 1311 FormaldehydeY 17,081 174 975 3SD 2631 KYOCERA AMERICA INC. 3469 FormaldehydeY 16,845 172 961 3SJU 257 CHEVRON USA INC. 1311 Arsenic 34 190 193 3MEN 100119 MASONITE HARDBRD DIV 2499 Formaldehyde 16,582 169 946 3COL 43 PIRELLI CABLE CORPORA 3643 Copper 17,300 1,234 3MBU 11 RMC PACIFIC MATERIALS 3241 Mercury Y 311 592 3LAK 240 CALPINE UNIT 16: POWER 4911 H2S Y 7,204 123 3SJU 50177 NAVAL PETROLEUM RESER1311 Formaldehyde 15,954 163 911 3AV 14194 LA CO., SANITATION DIST 4959 H2S 7,121 122 3FR 9999 B. AFB FAC WIDE 9711 Arsenic Y 32 179 183 3SHA 59 FAWNDALE ROCK & ASPHAL2951 Arsenic 32 179 182 3SC 8547 QUEMETCO INC. 3341 Arsenic Y 32 178 181 3MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Nickel Y 990 438 3,392 3LAK 240 CALPINE UNIT 16: POWER 4911 Ammonia Y 526,120 450 3NS 10006026 SANTA ROSA GEOTHERMAL 4961 Arsenic 31 174 177 3MOJ 1500535 PG&E HINKLEY COMPRES 4922 FormaldehydeY 15,251 156 870 3SC 800128 SOUTHERN CALIFORNIA 4923 FormaldehydeY 15,001 153 856 3BA 568 SAN FRANCISCO SOUTH E 4952 H2S 6,661 114 3NCU 59 P G & E-HUMBOLDT BAY P 4911 Arsenic Y 30 169 172 3SJU 1737 VINTAGE PETROLEUM INC 1311 FormaldehydeY 14,853 152 848 3NS 10006009 GEYSERS POWER CO UNIT4911 Arsenic Y 30 168 171 3SJU 1246 BERRY PETROLEUM COM 1311 Nickel Y 927 410 3,175 3SJU 20890 NEWARK SIERRA PAPERB 2621 Nickel 906 400 3,103 3IMP 50 A. W. HOCH 4911 Ammonia 477,456 409 3MOJ 1200003 TXI RIVERSIDE CEMENT 3241 Mercury Y 267 508 3SC 43436 TIMCO 3365 H2S Y 6,170 106 3SB 8015 PLATFORM HIDALGO 1311 FormaldehydeY 13,608 139 777 2SC 14759 RIVERSIDE CEMENT CO UN3255 Mercury 260 494 2BA 1534 SOUTH BAYSIDE SYSTEM 4952 H2S 5,950 102 2BA 10 CHEVRON U.S.A. INC. 2911 Arsenic Y 27 151 153 2MBU 68 EXXONMOBIL CORP 4612 H2S Y 5,886 101 2SJU 50234 SHELL WESTERN E&P INC. 1311 Mercury 252 479 2SC 13828 CHEVRON USA INC. 1311 H2S 5,856 100 2NS 10006028 NORTHERN CALIFORNIA 4961 Nickel 830 367 2,843 2NS 10006009 GEYSERS POWER CO UNIT4911 Ammonia Y 436,497 374 2BA 22 TOSCO REFINING COMPANY 4931 Mercury Y 237 451 2

2001NS 10006020 NCPA UNIT 4 4911 Mercury Y 236 448 2SC 104017 AERA ENERGY LLC 1311 FormaldehydeY 12,294 125 702 2SJU 50308 TEXACO USA, VENTURA P 1311 Formaldehyde 12,288 125 701 2SHA 40 WHEELABRATOR HUDSON E4931 Arsenic Y 25 139 142 2NS 10006025 UNOCAL GEOTHERMAL DIV4961 Arsenic 24 135 138 2SJU 299 UNOCAL OIL & GAS DIVISI 1311 Arsenic 24 134 136 2SJU 40152 MADERA GLASS COMPANY3221 Arsenic 24 132 135 2SB 3170 POPCO 1311 FormaldehydeY 11,499 117 656 2SJU 40161 PG&E KETTLEMAN COMPR4931 FormaldehydeY 11,440 117 653 2SJU 20921 OWENS-BROCKWAY GLASS3221 Arsenic 23 129 131 2SC 9053 CENTRAL PLANTS, INC./BU4961 Arsenic Y 23 129 131 2SC 23559 JOHNSON CONTROLS BAT 3691 Arsenic Y 23 128 130 2KER 20 LEHIGH SOUTHWEST CEME3241 Arsenic Y 23 126 129 2GLE 1000 JOHNS-MANVILLE 3296 Ammonia Y 371,652 318 2GBU 3050309 COSO OPERATING COMPAN4961 Arsenic Y 22 123 125 2SD 541 CABRILLO POWER II LLC N 4911 Arsenic Y 22 122 125 2BA 12758 ULTRAMAR INC 2911 FormaldehydeY 10,787 110 616 2SJU 40042 CITY OF FRESNO, PUBLIC 4952 Ammonia 363,047 311 2SJU 17 BEATRICE HUNT-WESSON 2033 Nickel 676 299 2,316 2SD 540 CABRILLO POWER II LLC 4911 Arsenic Y 21 120 122 2IMP 53 PLANT EAST MESA PEM UN4911 Ammonia 359,249 308 2COL 49 PG&E DELEVAN COMPRES4923 FormaldehydeY 10,547 108 602 2BA 17 HANSON PERMANENTE CEME3421 Mercury Y 199 379 2NS 10006014 GEYSERS POWER CO UNIT4911 Arsenic Y 21 117 119 2NCU 47 LOUISIANA-PACIFIC CORP.2493 FormaldehydeY 9,988 102 570 2BA 10 CHEVRON U.S.A. INC. 2911 FormaldehydeY 9,831 100 561 2IMP 52 ORMESA 1H 4911 Ammonia 333,990 286 2BA 12626 VALERO REFINING COMPAN2911 Ammonia Y 331,953 284 2BA 51 UNITED AIRLINES, MAINT 4953 FormaldehydeY 9,666 99 552 2SC 61209 AKZO NOBEL CHEM INC, F 2819 Ammonia 323,000 277 2SD 88196 S. D. CITY - MIRAMAR LAN 4953 Arsenic Y 19 107 109 2BA 8664 CROCKETT COGENERATION4911 Ammonia Y 319,501 274 2SJU 211 CHEMEX INC 723 Mercury 179 341 2MOJ 1500039 PG&E TOPOCK COMPRESS4922 FormaldehydeY 9,328 95 532 2NS 10006021 SONOMA POWER PLANT 4911 Arsenic Y 19 105 107 2KER 328 NAVAL AIR WEAPONS STA 9711 As cmpd(inorgY 19 105 107 2BA 41 OWENS CORNING 4931 Ammonia Y 312,461 268 2MOJ 11800001 MITSUBISHI CEMENT 2000 3241 Arsenic Y 18 101 103 2BA 2478 UCSF/PARNASSUS 8221 FormaldehydeY 8,787 90 502 2MBU 25 DUKE ENERGY MOSS LAND4911 Arsenic Y 18 99 101 2SC 1634 STEELCASE INC, WESTERN2521 FormaldehydeY 8,625 88 492 2PLA 13 GEORGIA PACIFIC CORPO 2421 Mercury 165 314 2SC 800134 SUN EXPLORATION & PROD1311 Formaldehyde 8,540 87 487 2SC 13828 CHEVRON USA INC. 1311 Benzene 116,914 5,764 334 2SJU 50037 CHEVRON BITTERWATER 4612 Nickel 536 237 1,835 2SC 15504 SCHLOSSER FORGE CO 3728 Nickel Y 532 235 1,822 2MOJ 11800001 MITSUBISHI CEMENT 2000 3241 Mercury Y 156 297 1SC 57038 GWF POWER SYSTEMS;OR4923 Formaldehyde 8,044 82 459 1NS 10006021 SONOMA POWER PLANT 4911 Ammonia Y 266,111 228 1IMP 15 IMPERIAL IRRIGATION DIS 4911 Nickel Y 498 220 1,706 1LAS 15 H.L. POWER COMPANY 4931 Ammonia Y 261,906 224 1TUO 1 SIERRA PACIFIC IND. STA 2421 FormaldehydeY 7,629 78 435 1NS 10006018 NCPA UNIT 2 4911 Nickel Y 475 210 1,625 1SC 21976 OLD QUAKER PAINT COM 2851 Mercury 142 270 1SB 4214 ORCUTT HILL IC ENGINES 1311 FormaldehydeY 7,101 72 405 1IMP 75 IMPERIAL RESOURCE REC 4911 HCl 157,334 2,993 1

2001SAC 194 SACRAMENTO POWER AUT4911 FormaldehydeY 6,983 71 399 1SC 4242 SAN DIEGO GAS & ELECTR4931 FormaldehydeY 6,957 71 397 1IMP 54 AMERICAN GIRL MINE 1041 HCN 25,053 477 1SHA 164 PACIFIC GAS & ELECTRIC 4922 FormaldehydeY 6,919 71 395 1SAC 106 REGIONAL SANITATION DI 4952 Ammonia 235,224 201 1SC 55449 BKK CORPORATION, LANDF4953 HCl Y 152,336 2,898 1SHA 51 BURNEY FOREST PRODUC2421 Ammonia Y 225,000 193 1SAC 195 SACRAMENTO COGENERAT4911 FormaldehydeY 6,541 67 373 1MBU 54 PACIFIC RECOVERY CORP 4953 FormaldehydeY 6,537 67 373 1BA 12626 VALERO REFINING COMPAN2911 Nickel Y 416 184 1,425 1SC 779 TRW INC 8734 Fluorides&cm 16,490 217 1SB 12 CELITE CORPORATION 3295 Nickel Y 411 181 1,406 1IMP 71 UNITS 1 AND 2 POWER PL 4911 Ammonia 218,772 187 1BA 22 TOSCO REFINING COMPANY 4931 HCl Y 143,550 2,731 1BA 12 MIRANT DELTA, LLC 4931 FormaldehydeY 6,384 65 364 1SC 800241 SHELL WESTERN E&P INC 1311 Formaldehyde 6,356 65 363 1NS 10006024 AIDLIN GEOTHERMAL PRO 4911 Mercury Y 122 231 1SC 131003 BP WEST COAST PRODUCT2911 Nickel Y 397 175 1,360 1MOJ 3101437 SOUTHERN CALIFORNIA G 4922 FormaldehydeY 6,210 63 354 1COL 55 WADHAM ENERGY LTD PA 4931 FormaldehydeY 6,136 63 350 1SC 16576 LA CO., SANITATION DIST 4952 Formaldehyde 6,111 62 349 1SJU 645 POSDEF POWER COMPANY,4911 Fluorides&cm Y 15,600 205 1GLE 43 MOBIL EXPL'N & PROD'G U.1311 Formaldehyde 6,001 61 343 1SC 113170 SANTA MONICA HOSPITAL 8011 XYLENES Y ### 344 1YS 45 TYCO PLASTICS 3081 Formaldehyde 5,826 59 333 1SC 8582 SOUTHERN CALIFORNIA G 4923 FormaldehydeY 5,772 59 329 1SJU 40224 SHELL WESTERN E & P INC1311 Nickel 365 162 1,251 1SC 37336 COMMERCE REFUSE TO EN4953 Mercury Y 109 207 1MOD 2501 TIOESTA COMPRESSOR ST4932 FormaldehydeY 5,640 58 322 1MOJ 3100068 SOUTHERN CALIFORNIA G 4923 FormaldehydeY 5,403 55 308 1SLO 13 TOSCO SANTA MARIA REF 2911 HCl Y 119,904 2,281 1SB 12 CELITE CORPORATION 3295 Mercury Y 102 195 1SJU 40214 SHELL OIL - KETTLEMAN 4612 Nickel 340 150 1,164 1SJU 50229 SHELL OIL WASCO PUMP 4612 Nickel 340 150 1,164 1SD 937 SEA WORLD INC. 7996 FormaldehydeY 5,315 54 303 1VEN 41 AERA ENERGY LLC 1311 FormaldehydeY 5,283 54 302 1SJU 50002 ARCO OIL AND GAS COMP 1311 Formaldehyde 5,276 54 301 1SC 59100 THAKAR ALUMINUM CORP.3341 HCl 116,505 2,217 1BA 10 CHEVRON U.S.A. INC. 2911 Ammonia Y 172,086 147 1SHA 51 BURNEY FOREST PRODUC2421 FormaldehydeY 5,030 51 287 1BA 541 PACIFIC GAS & ELECTRIC CO4939 FormaldehydeY 4,968 51 284 1IMP 46 SANTA FE PACIFIC GOLD 1041 HCN Y 17,705 337 1SC 12247 ALUMAX MILL PRODUCTS INC3353 HCl 109,016 2,074 1SC 14191 NICKLOR CHEMICAL CO. 5169 Chloropicrin Y 1,493 639 1SC 45448 GAS RECOVERY SYSTEMS,4925 Nickel Y 305 135 1,045 1SC 800236 LA CO., SANITATION DIST 4952 FormaldehydeY 4,775 49 273 1SJU 10316 DEL MONTE USA PLANT #12033 Nickel 304 134 1,041 1SC 131003 BP WEST COAST PRODUCT2911 FormaldehydeY 4,733 48 270 1SJU 257 CHEVRON USA INC. 1311 Mercury 90 171 1SJU 50046 CHEVRON USA LOST HILLS1321 Formaldehyde 4,680 48 267 1MOJ 8400589 US ARMY NATIONAL TRAIN9711 Copper Y 4,958 354 1SJU 20653 J.R. SIMPLOT COMPANY 2873 HF 11,850 145 1SJU 50002 ARCO OIL AND GAS COMP 1311 Nickel 292 129 999 1IMP 43 HEBER GEOTHERMAL 4911 Ammonia Y 152,770 131 1BA 1771 CITY OF SANTA CLARA 4911 FormaldehydeY 4,449 45 254 1LAS 11 CALIF CORRECTIONAL CE 9223 Nickel Y 279 123 956 1

2001SC 4477 SOUTHERN CALIFORNIA E 4911 FormaldehydeY 4,360 44 249 1MBU 11 RMC PACIFIC MATERIALS 3241 FormaldehydeY 4,347 44 248 1SD 72 DUKE ENERGY-SOUTH BA 4911 Nickel Y 273 121 936 1BA 621 CITY OF SANTA CLARA, SI 4941 FormaldehydeY 4,245 43 242 1SC 800039 DOUGLAS PRODUCTS DIVISI3728 HF 10,766 132 1MBU 25 DUKE ENERGY MOSS LAND4911 FormaldehydeY 4,137 42 236 1IMP 15 IMPERIAL IRRIGATION DIS 4911 Chlorine Y 9,132 7,818 1TUO 13 SONORA MINING CORP. 1041 Mercury 78 149 1SHA 2 LEHIGH SOUTHWEST CEME3241 Mercury Y 78 148 1SC 25016 CASTAIC CLAY MFG.CO., I 3251 Fluorides&cm Y 10,358 136 1SC 42676 AES PLACERITA, INC. 4911 Ammonia Y 138,016 118 1MOJ 35601021 CASTLE MOUNTAIN MINE 1041 FormaldehydeY 4,011 41 229 1MOJ 3100065 SOUTHERN CALIFORNIA G 4922 FormaldehydeY 3,914 40 223 1SHA 2 LEHIGH SOUTHWEST CEME3241 HCl Y 86,300 1,642 1MBU 51 UCSC 8221 FormaldehydeY 3,785 39 216 1KER 21 NATIONAL CEMENT CO 3241 Nickel Y 240 106 824 1SC 1836 UNION OIL CO OF CALIFOR1311 Formaldehyde 3,759 38 215 1SC 115254 COSMOTRONICS CORP. 3672 Mercury 72 137 1GBU 1 AMERICAN PERLITE COMP 3295 Nickel Y 239 105 817 1VEN 33 LA CONCHITA OIL & GAS 1311 FormaldehydeY 3,684 38 210 1NSI 3 SIERRA PACIFIC INDUSTRI 2421 FormaldehydeY 3,683 38 210 1SC 800116 SHELL OIL CO (EIS USE ON2911 Mercury 70 133 1SJU 50147 MCFARLAND ENERGY, INC 1311 Formaldehyde 3,649 37 208 1SJU 50170 MONARCH COGENERATION 4931 Ammonia 123,867 106 1SJU 232 NAVAL COMMUNICATION S9711 Nickel 232 103 795 1SJU 50142 MARATHON OIL S COLES L1321 Formaldehyde 3,610 37 206 1BA 3011 IPT SRI COGENERATION INC 4911 FormaldehydeY 3,591 37 205 1TUO 13 SONORA MINING CORP. 1041 Nickel 226 100 775 1BA 16 PHILLIPS 66 COMPANY - S 2911 Ammonia Y 120,530 103 1IMP 53 PLANT EAST MESA PEM UN4911 Benzene 48,649 2,398 139 1BA 907 CENTRAL CONTRA COSTA 4952 FormaldehydeY 3,497 36 200 1SB 1482 LAS FLORES CANYON 1311 FormaldehydeY 3,494 36 199 1MOJ 11800001 MITSUBISHI CEMENT 2000 3241 HCl Y 77,780 1,480 1MEN 100119 MASONITE HARDBRD DIV 2499 Nickel 222 98 760 1BA 16 PHILLIPS 66 COMPANY - S 2911 Mercury Y 66 125 1SC 8547 QUEMETCO INC. 3341 Mercury Y 65 124 1SD 73 CABRILLO POWER I LLC E 4911 FormaldehydeY 3,343 34 191 1SJU 37 KERN OIL & REFINING CO 2911 FormaldehydeY 3,321 34 190 1SJU 21150 SIMPSON PAPER COMPAN 2521 FormaldehydeY 3,316 34 189 1BA 8664 CROCKETT COGENERATION4911 FormaldehydeY 3,305 34 189 1NSI 1 SIERRA PACIFIC INDUSTRI 2421 FormaldehydeY 3,196 33 182 1BA 591 EAST BAY MUNICIPAL UTIL4952 FormaldehydeY 3,165 32 181 1SC 14759 RIVERSIDE CEMENT CO UN3255 Nickel 200 89 686 1SC 29110 OR. CO., SANITATION DIST 4953 FormaldehydeY 3,113 32 178 1IMP 47 NEW CHARLESTON POWER 4911 Chlorine 6,951 5,951 1SHA 18 SIERRA PACIFIC IND. - BU 2421 FormaldehydeY 3,100 32 177 1FR 19 SANTA FE MINERALS INC. 1311 Chlorine 6,843 5,859 1LAS 4 SIERRA PACIFIC IND 2421 Formaldehyde 3,030 31 173 1SD 5270 APPLIED ENERGY - N O R I 4931 FormaldehydeY 2,988 30 171 1SC 72635 MAIN STREET DAIRY 3556 Formaldehyde 2,977 30 170 1SD 478 SOUTHWEST MARINE INC. 3731 Copper Y 3,103 221 1SAC 1 AEROJET 3764 HCl Y 64,347 1,224 1SB 3831 CAT CANYON IC ENGINES 1311 FormaldehydeY 2,863 29 163 1SD 118 CP KELCO 2099 FormaldehydeY 2,831 29 162 1SC 9729 PGP INDUSTRIES INC 3341 Copper 3,000 214 1SC 47708 HELLMAN PROPERTIES LL 1131 FormaldehydeY 2,811 29 160 1

2001SJU 15 WESTERN COTTON SERVI 2074 Nickel 179 79 612 1SC 47232 ARCO CQC KILN 3463 Nickel Y 178 78 608 1SC 16299 AMERIGAS PROPANE L.P. 1311 Formaldehyde 2,766 28 158 1BA 1605 CHEVRON REAL ESTATE 6552 FormaldehydeY 2,760 28 158 1SJU 41 ANDERSON CLAYTON CORP2074 Nickel 174 77 596 0SC 57311 HUCK INTERNATIONAL, IN 3452 Chlorine 6,000 5,137 0SD 415 APPLIED ENERGY - NAVAL 4931 FormaldehydeY 2,676 27 153 0SJU 50228 SHELL OIL MID PUMPING 4612 Nickel 170 75 582 0SB 1734 LA GOLETA 4922 FormaldehydeY 2,652 27 151 0SJU 50234 SHELL WESTERN E&P INC. 1311 Formaldehyde 2,628 27 150 0SC 800030 CHEVRON U.S.A. INC. 2911 Nickel Y 168 74 574 0BA 1471 SARA LEE COFFEE & TEA 5149 Formaldehyde 2,611 27 149 0SJU 825 MENDOTA BIOMASS POWER4911 Formaldehyde 2,610 27 149 0SD 6974 RIDGEWOOD CALIF POWER4931 Formaldehyde 2,553 26 146 0NCU 37 SAMOA-PACIFIC CELLULOS2611 FormaldehydeY 2,548 26 145 0SD 72 DUKE ENERGY-SOUTH BA 4911 FormaldehydeY 2,516 26 144 0NCU 5 HAMBRO FOREST PROD 2493 FormaldehydeY 2,510 26 143 0BA 18 MIRANT DELTA, LLC 4931 FormaldehydeY 2,490 25 142 0MOJ 11800001 MITSUBISHI CEMENT 2000 3241 FormaldehydeY 2,479 25 141 0SC 121746 DUKE SOLUTIONS HUNTIN 4961 FormaldehydeY 2,466 25 141 0BA 17 HANSON PERMANENTE CEME3421 FormaldehydeY 2,441 25 139 0SJU 20921 OWENS-BROCKWAY GLASS3221 HCl 53,525 1,018 0SAC 200 GRANITE CONSTRUCTION 1442 FormaldehydeY 2,370 24 135 0VEN 388 SENECA RESOURCES COR1311 FormaldehydeY 2,349 24 134 0SB 27 CARPINTERIA GAS PLANT 1311 FormaldehydeY 2,315 24 132 0SC 16575 CENTRAL PLANTS, INC. 4961 FormaldehydeY 2,284 23 130 0BA 1634 NAPA STATE HOSPITAL 8062 FormaldehydeY 2,269 23 129 0SC 800026 ULTRAMAR INC (NSR USE 2911 FormaldehydeY 2,262 23 129 0SAC 112 GRAFIL INC 2824 HCN Y 8,111 154 0SJU 20387 DIAMOND WALNUT GROWER5145 Methyl BromidY 91,400 3,130 0VEN 970 TORCH OPERATING COMP 1311 FormaldehydeY 2,196 22 125 0PLA 34 SIERRA PACIFIC INDUSTRI 2421 FormaldehydeY 2,184 22 125 0SJU 50303 CHEVRON U.S.A. PRODUCT1311 Formaldehyde 2,175 22 124 0BA 227 CRITERION CATALYSTS C 2819 Nickel Y 135 60 463 0SHA 43 WHEELABRATOR SHASTA E.4931 FormaldehydeY 2,110 22 120 0SAC 193 CARSON ENERGY/SMUD 4911 FormaldehydeY 2,103 21 120 0SJU 50035 CHAPARRAL PETROLEUM I1311 Toluene 806,120 460 0SC 43436 TIMCO 3365 FormaldehydeY 2,038 21 116 0SD 8469 GOAL LINE LP - ESCONDI 4931 FormaldehydeY 2,027 21 116 0SC 42775 WEST NEWPORT OIL CO 1311 Formaldehyde 2,025 21 116 0MOJ 900002 IMC CHEMICALS, INC. 2819 Sulfuric Acid Y 2,541 435 0NCU 60 PACIFIC LUMBER COMPAN2421 FormaldehydeY 1,958 20 112 0IMP 15 IMPERIAL IRRIGATION DIS 4911 FormaldehydeY 1,957 20 112 0BUT 38 PACIFIC OROVILLE POWER,4911 FormaldehydeY 1,950 20 111 0SC 17285 PETROLANE-LOMITA GASO4925 Formaldehyde 1,940 20 111 0SC 800370 EQUILON ENTERPRISES, L 2911 Nickel Y 121 54 416 0SC 133046 PRECISION SPECIALTY MET3312 Nickel Y 120 53 412 0KER 47 EDWARDS AIR FORCE BAS9711 FormaldehydeY 1,883 19 107 0TUO 13 SONORA MINING CORP. 1041 Copper 1,996 142 0SJU 50113 HIGH SIERRA LIMITED 4911 Formaldehyde 1,870 19 107 0SB 8012 PLATFORM HABITAT 1311 FormaldehydeY 1,857 19 106 0BA 10 CHEVRON U.S.A. INC. 2911 Benzene Y 25,468 1,256 73 0SJU 11053 TRI-VALLEY GROWERS PL 2033 Nickel 117 52 401 0SC 8206 ENTERPRISE SALES CO. 2899 HCl 40,614 773 0SD 89296 S. D. METRO PUMPING STA4952 FormaldehydeY 1,817 19 104 0SC 124619 IMPRESS USA INC. 3411 FormaldehydeY 1,808 18 103 0

2001SJU 179 TRIANGLE PACIFIC CORP. 2434 Formaldehyde 1,802 18 103 0VEN 4 VINTAGE PETROLEUM INC.1311 FormaldehydeY 1,798 18 103 0SC 71817 FOAMEX-A DIV OF KIHI 3086 Methylene Chl 267,774 455 115 0LAS 16 MT. LASSEN POWER 4931 FormaldehydeY 1,764 18 101 0IMP 43 HEBER GEOTHERMAL 4911 Benzene Y 23,680 1,167 68 0NS 10006021 SONOMA POWER PLANT 4911 Nickel Y 107 47 366 0SJU 50251 TEXACO REFINING & MAR 9411 Benzene Y 22,438 1,106 64 0SC 46268 CALIFORNIA STEEL INDUST3312 HCl Y 35,378 673 0MBU 30 CHEVRONTEXACO 1311 Chlorine Y 3,451 2,955 0SJU 40165 PPG INDUSTRIES INC. 3211 HCl Y 34,507 657 0SC 74696 TRW TECHNAR INC 3679 Copper 1,608 115 0KER 9 CALIFORNIA PORTLAND C 3241 HCl Y 33,400 635 0SJU 50029 CALIFORNIA CORRECTION 9223 Chlorine 3,324 2,846 0MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Copper Y 1,502 107 0SJU 50182 OXY USA INC. 1311 Nickel 90 40 307 0SC 62281 COASTCAST CORPORATIO3949 Nickel Y 89 39 305 0SC 95433 ORANGE COUNTY METAL 3471 Chlorine 3,040 2,603 0MOJ 5400246 AEROCHEM INC 3728 HCl Y 29,586 563 0COL 54 ARKOMA PRODUCTIONS C 1381 Chlorine 2,956 2,530 0SJU 645 POSDEF POWER COMPANY,4911 Nickel Y 83 37 283 0SJU 40128 J.G. BOSWELL OIL MILL 723 Nickel 81 36 279 0COL 34 COASTAL OIL & GAS CORP1381 Chlorine 2,839 2,431 0TUO 1 SIERRA PACIFIC IND. STA 2421 Nickel Y 79 35 271 0LAS 4 SIERRA PACIFIC IND 2421 Nickel 79 35 271 0SC 29416 GREAT WESTERN BANK 6035 Nickel 79 35 270 0SC 61063 K.M. RECORDS, INCORPO 3931 Nickel 77 34 264 0FR 19002 CUSTOM CHROME & BUMP3471 Sulfuric Acid 1,530 262 0SC 1718 NATTER MFG COMPANY 3469 Nickel 75 33 257 0SJU 239 TRACY PUMP STATION 4612 Nickel 75 33 256 0SB 18 SISQUOC SAND, ROCK AN 2951 Nickel Y 74 33 255 0FR 18 HARTER PIK'DRITE, INC. 2033 Chlorine 2,500 2,140 0SAC 200 GRANITE CONSTRUCTION 1442 Nickel Y 71 31 244 0SAC 194 SACRAMENTO POWER AUT4911 Sulfuric Acid Y 1,422 244 0YS 5155 CHIRON CORPORATION 2834 Sulfuric Acid 1,409 241 0SJU 33 RANCHERS COTTON OIL 2074 Nickel 70 31 241 0SJU 2052 MODESTO IRRIGATION DIS4931 Nickel Y 70 31 241 0SC 800089 MOBIL OIL CORP 2911 Nickel Y 70 31 239 0COL 36 P G & E RESOURCES COM 1381 Chlorine 2,330 1,995 0FR 22 P G & E RESOURCES 1311 Chlorine 2,287 1,958 0LAS 16 MT. LASSEN POWER 4931 Nickel Y 65 29 222 0SB 11 GRANITE - BUELLTON 2951 Nickel Y 64 28 219 0SJU 645 POSDEF POWER COMPANY,4911 HCl Y 21,754 414 0SC 20144 CANON BUSINESS MACHIN3861 HCl Y 21,637 412 0SJU 36 SAN JOAQUIN REFINING 2911 Nickel Y 61 27 211 0NSI 1 SIERRA PACIFIC INDUSTRI 2421 Nickel Y 61 27 209 0NCU 37 SAMOA-PACIFIC CELLULOS2611 Nickel Y 61 27 207 0SD 19 NATIONAL STEEL & SHIPB 3731 Nickel Y 60 26 204 0SC 800363 TOSCO REFINING COMPA 2911 Nickel Y 58 26 200 0SC 800153 US GOVT, NAVY DEPT LB 9711 Nickel 58 26 198 0SC 800116 SHELL OIL CO (EIS USE ON2911 Nickel 58 26 198 0SC 48522 INTERNATIONAL RECTIFIE 3674 Sulfuric Acid Y 1,126 193 0SJU 50247 TANNEHILL OIL COMPANY 1311 Nickel Y 56 25 192 0SC 80066 COATINGS RESOURCE CO 2851 Perc Y 185,455 1,860 907 0SC 14800 INTERSTATE ENGINEERING3589 Nickel 55 24 189 0NCU 96 FAIRHAVEN POWER COMP4911 Nickel Y 55 24 189 0MOJ 1200003 TXI RIVERSIDE CEMENT 3241 Nickel Y 55 24 188 0

2001BA 31 DOW CHEMICAL COMPANY 5161 Chlorine Y 1,915 1,639 0SD 90009 TRI CITY PLATING, INC. 3471 Nickel 54 24 186 0TUO 12 PACIFIC-ULTRAPOWER CH4911 Nickel Y 52 23 177 0SC 7427 OWENS-BROCKWAY GLASS3221 HCl Y 17,951 342 0SD 8201 CA PLATING 3471 Nickel Y 51 23 175 0SC 9496 BENDER MACHINE, INC. 3599 Nickel Y 51 22 174 0SC 35302 OWENS CORNING FIBERGLASS COR2952 Nickel Y 51 22 174 0SC 800039 DOUGLAS PRODUCTS DIVISI3728 Perc 166,959 1,675 817 0FR 19002 CUSTOM CHROME & BUMP3471 Nickel 50 22 171 0SD 90022 WEST COAST PLATING 3471 Nickel 50 22 170 0COL 201 OXY USA, INC. 1381 Chlorine 1,717 1,470 0SC 800103 POWERINE OIL CO (EIS USE)2911 Chlorine 1,692 1,448 0SC 14855 MILLER BREWING COMPA 2082 Chlorine Y 1,662 1,423 0SD 649 ESCONDIDO PLATING 3471 Nickel 47 21 160 0BA 1438 NEW UNITED MOTOR MAN 4931 EGBE Y 108,669 930 0SC 800026 ULTRAMAR INC (NSR USE 2911 Nickel Y 47 21 159 0PLA 44 RIO-BRAVO 4911 Nickel Y 46 20 158 0SC 1464 COACHELLA VALLEY WATE4941 Chlorine 1,590 1,361 0SC 53610 LA CO., METROPOLITAN T 4111 HCl 15,487 295 0SHA 59 FAWNDALE ROCK & ASPHAL2951 Nickel 44 20 151 0NCU 60 PACIFIC LUMBER COMPAN2421 Nickel Y 43 19 146 0SC 12247 ALUMAX MILL PRODUCTS INC3353 Nickel 43 19 146 0SC 124812 FAIRCHILD HOLDING CORP3452 Perc Y 141,298 1,417 691 0SC 43759 LA CO., METROPOLITAN T 4119 HCl 14,713 280 0SJU 228 DDRW TRACY SITE 9711 Chlorine 1,460 1,250 0SC 167 INDUSTRIAL ASPHALT, CO 2951 Chlorine 1,460 1,250 0COL 33 TRITON OIL & GAS CORP. 1381 Chlorine 1,459 1,250 0SD 6129 APPLIED MICRO CIRCUITS 3674 Sulfuric Acid 829 142 0SJU 50242 STOCKDALE OIL & GAS 1311 Nickel 41 18 140 0VEN 244 ARCTURUS MANUFACTURI3463 Nickel 40 18 137 0SC 102684 HUCK INTERNATIONAL - D 3451 Nickel 39 17 135 0SJU 31 AMETEK-MICROFOAM 3081 Nickel 39 17 133 0VEN 22 HALACO ENGINEERING C 3341 Nickel Y 38 17 132 0MBU 13 NATIONAL REFRACTORIE 3297 HCl 13,421 255 0MOJ 104801880 RELIANT ENERGY 4911 Chlorine Y 1,316 1,127 0SB 2650 UNION ASPHALT 2951 Nickel 37 16 127 0SD 478 SOUTHWEST MARINE INC. 3731 Nickel Y 36 16 125 0SJU 247 MOBIL EXPLORATION AND 1311 HCl 12,772 243 0KER 28 U.S. BORAX 1474 Nickel Y 36 16 125 0SC 48323 SIGMA PLATING CO INC 3471 Nickel Y 36 16 125 0SJU 40123 INDUSTRIAL ASPHALT 2951 Chlorine 1,260 1,079 0KER 20 LEHIGH SOUTHWEST CEME3241 HCl Y 12,440 237 0NS 10006026 SANTA ROSA GEOTHERMAL 4961 Nickel 35 15 120 0BUT 1005 OROVILLE HOSPITAL 8062 HCl 11,900 226 0SC 39555 CRAGAR INDUSTRIES 3471 Nickel 34 15 115 0SC 74696 TRW TECHNAR INC 3679 HCl 11,754 224 0SC 24755 PACIFIC AIRMOTIVE CORP 4581 Nickel 34 15 115 0NSI 3 SIERRA PACIFIC INDUSTRI 2421 Nickel Y 32 14 110 0SD 94 USN NORTH ISLAND 9711 Nickel Y 32 14 109 0MOJ 8400589 US ARMY NATIONAL TRAIN9711 Nickel Y 31 14 106 0IMP 54 AMERICAN GIRL MINE 1041 Nickel 31 14 106 0SHA 51 BURNEY FOREST PRODUC2421 Nickel Y 31 14 105 0SC 48273 GQI CLASSIC BRASS INC. 3471 Nickel 30 13 103 0KER 572 RAND MINING COMPANY 1041 Nickel 30 13 102 0SD 96387 MINNESOTA METHANE - MI4931 HCl Y 10,178 194 0SC 7254 DIVERSEY CORP. 2841 Chlorine 1,015 869 0

2001BA 148 BALL METAL BEVERAGE C 3411 EGBE Y 65,345 559 0MBU 11 RMC PACIFIC MATERIALS 3241 HCl Y 9,579 182 0SB 12 CELITE CORPORATION 3295 HCl Y 9,529 181 0SC 29110 OR. CO., SANITATION DIST 4953 Chlorine Y 922 789 0SC 42743 WESTERN MOULDINGS 3449 Perc 84,000 843 411 0SC 42220 SAN BERN. CO, CRESTLIN 9511 Chlorine 880 753 0SC 11193 BRUNSWICK CORP, DEFEN3761 Chlorine 864 740 0SC 55380 SANTEE DAIRIES INC 2026 Chlorine 825 706 0BA 2371 USS-POSCO INDUSTRIES 3356 HCl Y 8,196 156 0SC 18241 PACIFIC STEEL TREATING 3399 Perc 76,294 765 373 0YS 39 HUNT WESSON, INC 2033 Chlorine 784 671 0MOJ 5400246 AEROCHEM INC 3728 Perc Y 74,598 748 365 0ED 27 SOUTH TAHOE PUB. UTILIT4952 Chlorine Y 778 666 0SC 55344 ARISTECH CHEM CORP 2821 HCl 7,550 144 0BA 1996 INTEGRATED ENVIRONME 4953 HCl Y 7,226 137 0SD 96224 MINNESOTA METHANE - NO4931 HCl Y 6,940 132 0SC 800020 BUILDERS BRASS WKS COR3366 Perc 65,600 658 321 0SJU 2052 MODESTO IRRIGATION DIS4931 Chlorine Y 677 580 0SC 7855 KNOTT'S BERRY FARM 7996 Chlorine 677 579 0SC 800150 US GOVT., AF DEPT, MAR 9711 HCl Y 6,678 127 0SJU 1820 RIO BRAVO FRESNO 4931 Chlorine Y 667 571 0SD 8717 S. D. COUNTY - SAN MARC 4953 HCl Y 6,576 125 0BA 31 DOW CHEMICAL COMPANY 5161 HCl Y 6,426 122 0SC 14784 LOCKHEED AERONAUTICAL3728 Perc 61,200 614 299 0COL 128 THE TERMO CO 1381 Chlorine Y 595 509 0SC 14191 NICKLOR CHEMICAL CO. 5169 Methyl BromidY 10,513 360 0SC 2405 NI INDUSTRIES, INC.,NORR3483 Chlorine 564 483 0SC 49805 LA CITY, BUREAU OF SANI 4953 HCl 5,639 107 0BA 1179 REDWOOD LANDFILL INC 4953 HCl Y 5,568 106 0SJU 40115 GWF POWER SYSTEMS CO4911 HCl 5,508 105 0MOJ 1200003 TXI RIVERSIDE CEMENT 3241 HCl Y 5,439 103 0COL 50 MCGILL AND SHEPHERD 1381 Chlorine 540 462 0SC 6150 ALLIED SIGNAL AEROSPA 3365 HCl 5,379 102 0KER 47 EDWARDS AIR FORCE BAS9711 HCl Y 5,274 100 0SC 19989 PARKER HANNIFIN AEROS 3720 Perc Y 49,800 499 244 0SC 20197 LAC/USC MEDICAL CENTE 8062 Chlorine Y 504 432 0SC 126501 VOUGHT AIRCRAFT INDUS 3721 Perc Y 47,205 473 231 0KER 21 NATIONAL CEMENT CO 3241 Epichlorohydri Y 3,001 117 171 0SC 18426 RYDER AVIALL, INC 5088 Perc 45,941 461 225 0SJU 534 DOLE DRIED FRUIT & NUT 2068 Methyl Bromid 8,925 306 0SD 7006 ISP ALGINATES INC 2833 Chlorine Y 473 405 0SC 46837 SIMPSON PAPER CO @ CO2621 Chlorine 468 401 0SC 5645 STANDARD NICKEL CHROM3471 Perc Y 44,456 446 217 0SC 10924 SHERATON PLAZA LA REI 7011 Chlorine 454 389 0YS 5 FARMERS' RICE COOPERA 2044 Methyl BromidY 8,225 282 0FR 16004 SUNSWEET GROWERS INC 723 Methyl BromidY 8,070 276 0MBU 18 SALZ LEATHERS INC. 3111 EGBE 26,926 231 0SC 6929 LEACH CORP, RELAY GRO 3679 Perc 35,757 359 175 0SJU 2274 VARCO PRUDEN BUILDINGS3411 EGBE Y 24,859 213 0BA 10989 CROWN CORK & SEAL 3499 EGBE Y 24,690 211 0SC 6643 TECHNICOLOR, INC 7819 Perc Y 35,261 354 173 0COL 22 MOBIL EXPLORATION & P 1381 Chlorine 370 317 0MOJ 19901418 HELENDALE WASTEWATER4952 Chlorine 360 308 0SC 19572 ARTISTIC BRASS 3432 Perc 31,932 320 156 0SC 16642 ANHEUSER-BUSCH INC.(L 2082 Chlorine Y 334 286 0SC 38971 RICOH ELECTRONICS INC 3579 Perc Y 29,820 299 146 0

2001SC 61209 AKZO NOBEL CHEM INC, F 2819 Chlorine 304 260 0SC 74696 TRW TECHNAR INC 3679 EGBE 19,992 171 0SC 7010 PRUDENTIAL OVERALL SU 7219 Perc Y 28,486 286 139 0NSI 3 SIERRA PACIFIC INDUSTRI 2421 Chlorine Y 298 255 0SAC 3082 SIERRA SUEDE & LEATHE 7216 Perc 27,553 276 135 0SJU 40139 J.R. SIMPLOT COMPANY 2819 Chlorine 285 244 0SAC 3035 DRY CLEAN TODAY 7216 Perc 26,812 269 131 0SC 37601 ANDERSON LITHOGRAPH CO 2752 EGBE 18,021 154 0NSI 1 SIERRA PACIFIC INDUSTRI 2421 Chlorine Y 266 228 0SC 800189 DISNEYLAND RESORT 7996 Chlorine Y 261 223 0SC 20375 PRUDENTIAL OVERALL SU 7218 Perc Y 24,621 247 120 0SC 10069 BAZZ-HOUSTON CO 3493 Perc 24,557 246 120 0SD 813 EL DORADO CLEANERS / C7216 Perc 24,527 246 120 0SC 62665 DRILUBE COMPANY 3471 Perc 24,350 244 119 0SC 11986 ASTECH 3471 Perc 23,345 234 114 0SJU 50069 DEXZEL, INC. 4911 Chlorine 244 209 0YS 5008 INTERNATIONAL HOME FOO2032 Chlorine 239 205 0SC 59526 BFM ENERGY PRODUCTS 3449 Perc 22,545 226 110 0SC 20842 E J S LIGHTING CORP 3645 Perc 21,762 218 106 0YS 36 PORT OF SACRAMENTO 4491 Methyl BromidY 4,179 143 0SC 6163 OHLINE 2431 EGBE Y 14,958 128 0SJU 20777 LODI METAL TECH INC 2542 EGBE 14,804 127 0SC 800232 HUNT-WESSON INC 2033 Chlorine 210 180 0BA 13061 RELIZON COMPANY 2752 EGBE 13,924 119 0SAC 201 SILGAN CAN COMPANY 3411 EGBE Y 13,894 119 0SC 22092 WESTERN TUBE & CONDUI3317 EGBE Y 13,784 118 0SJU 20653 J.R. SIMPLOT COMPANY 2873 Chlorine 200 171 0SC 14191 NICKLOR CHEMICAL CO. 5169 Chlorine Y 192 164 0SC 16642 ANHEUSER-BUSCH INC.(L 2082 Methyl BromidY 3,540 121 0SJU 33 EQUILON ENTERPRISES L 2911 Chlorine Y 180 154 0BA 55 LOCKHEED MARTIN CORPO3769 EGBE Y 11,951 102 0COL 57 ABA ENERGY CORPORATI 1311 Chlorine 153 131 0SC 28813 ALUMIN-ART PLATING, INC 3471 Chlorine 152 130 0SJU 50243 STYROTEK INC. 2821 Chlorine 149 127 0SC 800216 INT'L LIGHT METALS COR 3365 Chlorine 144 123 0SC 12441 SHERATON UNIVERSAL HOTE7011 Chlorine 143 122 0MOJ 9600500 BARSTOW, CITY OF - WW 4952 Chlorine Y 141 121 0SJU 50177 NAVAL PETROLEUM RESER1311 Chlorine 141 121 0SC 800171 MOBIL OIL CO 5171 Chlorine Y 140 120 0SC 6384 LA CO., RANCHO LOS AMI 8060 Chlorine Y 132 113 0NSI 15 COLLINS PINE CO 2421 Chlorine Y 131 112 0SJU 40017 CALIF STATE UNIVERSITY 8221 Chlorine 129 110 0COL 114 PETSEC(AA PRODUCTION 1311 Chlorine 129 110 0SC 7120 METAL CONTAINER CORP 3411 Chlorine 124 106 0SC 9729 PGP INDUSTRIES INC 3341 Chlorine 120 103 0SC 14855 MILLER BREWING COMPA 2082 Glutaraldhyd Y 3,785 8,102SC 4783 LOS ALAMITOS MEDICAL 9999 Glutaraldhyd 3,560 7,620SJU 50234 SHELL WESTERN E&P INC. 1311 Phosphorus 2,112 5,166TUO 13 SONORA MINING CORP. 1041 Cadmium 595 4,246 5,092MBU 25 DUKE ENERGY MOSS LAND4911 Phosphorus Y 2,036 4,980NS 10006021 SONOMA POWER PLANT 4911 Phosphorus Y 1,930 4,721SC 62212 MARK INDUSTRIES 3531 Manganese 5,250 4,495SC 14759 RIVERSIDE CEMENT CO UN3255 Beryllium 184 749 4,493SC 14833 SAINT JOHN'S HEALTH CE 8062 Glutaraldhyd Y 2,084 4,460SC 800151 US GOVT, AF DEPT, NORT 9711 Glutaraldhyd 2,076 4,443ED 7 SIERRA PACIFIC INDUSTRI 2421 Manganese Y 4,698 4,022

2001NCU 59 P G & E-HUMBOLDT BAY P 4911 Phosphorus Y 1,479 3,617MOJ 8400589 US ARMY NATIONAL TRAIN9711 Cadmium Y 400 2,856 3,425SC 14759 RIVERSIDE CEMENT CO UN3255 Cadmium 349 2,494 2,990NS 10006025 UNOCAL GEOTHERMAL DIV4961 Phosphorus 1,174 2,872SJU 1379 BLUE PACIFIC SPAS 3949 MeDiphenDiis 11,449 2,801GBU 1 AMERICAN PERLITE COMP 3295 Manganese Y 3,070 2,628SJU 247 MOBIL EXPLORATION AND 1311 Phosphorus 1,038 2,538MOJ 100005 CEMEX - BLACK MOUNTAI 3241 Phosphorus Y 943 2,308IMP 47 NEW CHARLESTON POWER 4911 Phosphorus 926 2,265SC 59571 MULTI-CHEM PROD. INC 2891 T-2,4-diisocya 926 17 2,265NS 10006004 GEYSERS POWER CO UNIT4911 Manganese Y 2,569 2,199SC 15755 CRAIN INDUSTRIES, INC 3086 T-2,4-diisocya 890 17 2,177SC 50078 JACK FALLUCCA 7532 ChromiumTriO 48 6,365 2,137SC 7458 GOLDENHILL WOOD PROD 2493 MeDiphenDiis 8,408 2,057SHA 44 DICALITE MINERALS COR 1499 Manganese Y 2,270 1,943TUO 1 SIERRA PACIFIC IND. STA 2421 Manganese Y 2,147 1,839SJU 257 CHEVRON USA INC. 1311 Phosphorus 733 1,794SLO 13 TOSCO SANTA MARIA REF 2911 Manganese Y 1,992 1,705NCU 96 FAIRHAVEN POWER COMP4911 Manganese Y 1,950 1,670KER 21 NATIONAL CEMENT CO 3241 Cadmium Y 164 1,172 1,405NCU 60 PACIFIC LUMBER COMPAN2421 Manganese Y 1,511 1,294SJU 645 POSDEF POWER COMPANY,4911 Manganese Y 1,390 1,190NS 10006005 GEYSERS POWER CO UNIT4911 Manganese Y 1,276 1,092SJU 1820 RIO BRAVO FRESNO 4931 Manganese Y 1,270 1,087SC 800363 TOSCO REFINING COMPA 2911 Cadmium Y 119 853 1,023KER 9 CALIFORNIA PORTLAND C 3241 Beryllium Y 40 164 983NS 10006021 SONOMA POWER PLANT 4911 Cadmium Y 108 768 921GBU 3050309 COSO OPERATING COMPAN4961 Cadmium Y 106 754 905SC 7730 E R CARPENTER CO INC 3086 T-2,4-diisocya Y 369 7 902SJU 40125 INDUSTRIAL ASPHALT 2951 Manganese 1,049 898NSI 15 COLLINS PINE CO 2421 Manganese Y 1,013 867KER 9 CALIFORNIA PORTLAND C 3241 Manganese Y 996 853SJU 825 MENDOTA BIOMASS POWER4911 Manganese 982 841SJU 299 UNOCAL OIL & GAS DIVISI 1311 Phosphorus 342 836MOJ 8400589 US ARMY NATIONAL TRAIN9711 Manganese Y 933 799KER 28 U.S. BORAX 1474 Manganese Y 926 793SC 45448 GAS RECOVERY SYSTEMS,4925 Manganese Y 917 785SHA 39 SIERRA PACIFIC IND. - SH 2421 Manganese Y 916 784SC 35418 INDUSTRIAL ASPHALT 2951 Manganese 909 778PLA 28 SIERRAPINE LTD - ROCKLI 2493 Manganese Y 859 735SB 12 CELITE CORPORATION 3295 Acetaldehyde Y 38,617 177 735NS 10006021 SONOMA POWER PLANT 4911 Beryllium Y 30 122 729SJU 2274 VARCO PRUDEN BUILDINGS3411 Manganese Y 848 726BA 11693 FOAMEX, L P 3086 TolueneDiisoc 296 6 724SC 59100 THAKAR ALUMINUM CORP.3341 Manganese 824 706TUO 12 PACIFIC-ULTRAPOWER CH4911 Manganese Y 815 698SJU 211 CHEMEX INC 723 Phosphorus 282 690SC 99119 INTERPLASTIC CORP 2821 Maleic Anhydr Y 2,729 668SB 12 CELITE CORPORATION 3295 Cadmium Y 77 548 657VEN 137 WESTERN FARM SERVICE 7389 Phosphorus 268 656PLA 44 RIO-BRAVO 4911 Manganese Y 738 632MOJ 100005 CEMEX - BLACK MOUNTAI 3241 Cadmium Y 73 522 626KER 21 NATIONAL CEMENT CO 3241 Manganese Y 723 619LAS 4 SIERRA PACIFIC IND 2421 Manganese 710 608MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Beryllium Y 25 101 608SJU 31 AMETEK-MICROFOAM 3081 Cadmium 70 500 600

2001IMP 65 PLANT EAST MESA UNIT 1 4911 Phosphorus Y 239 584SC 55380 SANTEE DAIRIES INC 2026 Glutaraldhyd 270 578GLE 1000 JOHNS-MANVILLE 3296 Glutaraldhyd Y 261 559BA 12975 LESAFFRE YEAST CORPORA2099 Acetaldehyde 28,979 133 551SC 15755 CRAIN INDUSTRIES, INC 3086 T-2,6-diisocya 223 4 545SJU 1222 DOPACO INC 2657 Maleic Anhydr Y 2,189 535SC 19027 INTERCEM CORP 9999 Glutaraldhyd 250 535SJU 40032 CHEVRON - COALINGA/KE 1311 Phosphorus 213 522SJU 17 BEATRICE HUNT-WESSON 2033 Manganese 609 521SC 457 LA CO DEPT HEALTH SRV, 8052 Glutaraldhyd 238 509LAS 16 MT. LASSEN POWER 4931 Manganese Y 575 492NS 10006012 GEYSERS POWER CO UNIT4911 Manganese Y 569 487SC 800181 CALIFORNIA PORTLAND C 3241 Cadmium Y 55 396 475NS 10006011 GEYSERS POWER CO UNIT4911 Manganese Y 532 455SJU 20890 NEWARK SIERRA PAPERB 2621 Phosphorus 176 432VEN 1266 MASON CONSTRUCT & ENG1629 DieselExhPM 12,185 6,214 417NS 10006009 GEYSERS POWER CO UNIT4911 Manganese Y 475 407SD 88196 S. D. CITY - MIRAMAR LAN 4953 Manganese Y 473 405SC 131003 BP WEST COAST PRODUCT2911 Cadmium Y 46 332 398SC 7730 E R CARPENTER CO INC 3086 T-2,6-diisocya Y 162 3 397SC 4344 KUSTOM FIT MFG CO 2531 T-2,4-diisocya 147 3 359SJU 20528 GENERAL MILLS, INC. 2043 Phosphorus 146 358BA 2300 FLEISCHMANN'S YEAST 2099 Acetaldehyde Y 18,721 86 356SJU 50234 SHELL WESTERN E&P INC. 1311 Beryllium 15 59 356NSI 1 SIERRA PACIFIC INDUSTRI 2421 Manganese Y 410 351SJU 20921 OWENS-BROCKWAY GLASS3221 Cadmium 41 292 350SC 1615 GREAT WESTERN CARPET3069 Fluorocarb(Cl) ### 342SC 88551 FOAMEX INTERNATIONAL, 3086 Fluorocarb(Cl) ### 342SC 54627 HICKORY SPRINGS OF CAL3086 T-2,4-diisocya Y 139 3 340SC 8282 THERMCO SYSTEMS CORP 3599 T-2,4-diisocya 138 3 337SJU 50140 M.H. WHITTIER, CORPORA 1311 Beryllium 13 55 328SC 45623 LAWSON HUGHES CO., IN 3312 Manganese 383 327BUT 43 PACIFIC COAST PRODUCE 2033 ChlorineDioxi 1,136 324SJU 211 CHEMEX INC 723 Beryllium 13 52 310TUO 15 SIERRA PACIFIC IND. (CHI 2421 Manganese Y 363 310YS 36 PORT OF SACRAMENTO 4491 Manganese Y 361 309SC 53610 LA CO., METROPOLITAN T 4111 Cadmium 35 250 300SC 73899 OREGON STEEL MILLS-FO 3312 Cadmium 35 248 298KER 572 RAND MINING COMPANY 1041 Manganese 344 294SC 81892 FOAMEX INTERNATIONAL INC3086 T-2,4-diisocya 120 2 294NS 10006007 GEYSERS POWER CO UNIT4911 Manganese Y 334 286SJU 40208 SANTA FE ENERGY RESOU1311 Phosphorus 115 283SJU 1246 BERRY PETROLEUM COM 1311 Phosphorus Y 114 279SC 18931 TAMCO 2759 Manganese Y 325 278SC 42157 ELLIOTT'S DESIGNS INC 2519 Manganese 324 277NS 10006026 SANTA ROSA GEOTHERMAL 4961 Phosphorus 110 269VEN 36 PACIFIC CUSTOM MATERI 3259 Phosphorus Y 110 268IMP 54 AMERICAN GIRL MINE 1041 Cadmium 31 221 265SC 5673 RELIANCE UPHOLSTERY S 5087 T-2,4-diisocya 107 2 262SC 800068 HUGHES AIRCRAFT CO (EI 3761 T-2,4-diisocya 106 2 259AV 1401927 CALMAT CO. DBA VULCAN 1442 DieselExhPM Y 7,380 3,764 253SJU 15 WESTERN COTTON SERVI 2074 Cadmium 29 210 252NS 10006006 GEYSERS POWER CO UNIT4911 Manganese Y 295 252SC 102075 FOAMEX 3086 T-2,4-diisocya Y 102 2 250SD 19 NATIONAL STEEL & SHIPB 3731 Manganese Y 291 249NS 10006016 GEYSERS POWER CO UNIT4911 Manganese Y 289 247

2001FR 9999 B. AFB FAC WIDE 9711 Manganese Y 288 246SJU 41 ANDERSON CLAYTON CORP2074 Cadmium 29 205 245MBU 42 TLD LANTIS CORP 3499 Manganese 285 244MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Cadmium Y 28 203 243MOJ 999900001 LEAD MASTERS 3341 Manganese 280 240SC 54177 PARK STEEL COMPANY IN 3441 Manganese 278 238SJU 50308 TEXACO USA, VENTURA P 1311 Acetaldehyde 12,451 57 237BA 12626 VALERO REFINING COMPAN2911 Manganese Y 277 237IMP 67 PLANT EAST MESA UNIT 2 4911 Phosphorus 96 236SHA 51 BURNEY FOREST PRODUC2421 Manganese Y 274 235MEN 100119 MASONITE HARDBRD DIV 2499 Manganese 273 234SAC 67 BLUE DIAMOND GROWERS2099 Phosphine Y 1,080 231NSI 1 SIERRA PACIFIC INDUSTRI 2421 Cadmium Y 27 193 231SJU 40028 CHAMPION PARTS WESTER3714 Cadmium 26 185 222NS 10006014 GEYSERS POWER CO UNIT4911 Manganese Y 257 220MOJ 1200003 TXI RIVERSIDE CEMENT 3241 Manganese Y 255 218BA 187 PACIFIC STEEL CASTING 3325 Manganese 249 213AV 118202037 MOUNTAIN HIGH SKI AREA 7999 DieselExhPM Y 6,198 3,161 212SC 47581 HYDREL, GTY IND DIV 3645 Cadmium 24 174 209SC 3723 STERLING ELECTRIC INC 3621 Cadmium 24 170 203SC 88551 FOAMEX INTERNATIONAL, 3086 T-2,6-diisocya 83 2 203SC 1615 GREAT WESTERN CARPET3069 T-2,6-diisocya 83 2 203VEN 137 WESTERN FARM SERVICE 7389 Manganese 235 201SC 45448 GAS RECOVERY SYSTEMS,4925 Cadmium Y 23 164 197PLA 43 LAUSMANN LUMBER & MOU2431 Manganese Y 228 195SC 7668 CLARK FOAM PROD. GORD3089 T-2,4-diisocya 79 1 193COL 55 WADHAM ENERGY LTD PA 4931 Cadmium Y 22 159 190SJU 20890 NEWARK SIERRA PAPERB 2621 Cadmium 22 159 190SC 1615 GREAT WESTERN CARPET3069 T-2,4-diisocya 77 1 189SC 88551 FOAMEX INTERNATIONAL, 3086 T-2,4-diisocya 77 1 189KER 20 LEHIGH SOUTHWEST CEME3241 Manganese Y 221 189VEN 445 CAMARILLO SANITARY DIS 4952 Phosphorus 77 189BA 12626 VALERO REFINING COMPAN2911 Cadmium Y 22 157 188TUO 1 SIERRA PACIFIC IND. STA 2421 Cadmium Y 22 155 186MOJ 900002 IMC CHEMICALS, INC. 2819 Cadmium Y 22 155 185NSI 3 SIERRA PACIFIC INDUSTRI 2421 Manganese Y 214 183SC 8547 QUEMETCO INC. 3341 Cadmium Y 21 151 181VEN 144 VENTURA CO - REG MED 8062 Glutaraldhyd 84 179SJU 1820 RIO BRAVO FRESNO 4931 Cadmium Y 21 147 176SC 47232 ARCO CQC KILN 3463 Cadmium Y 21 147 176MOJ 3101437 SOUTHERN CALIFORNIA G 4922 Acetaldehyde Y 9,188 42 175SJU 50140 M.H. WHITTIER, CORPORA 1311 Glutaraldhyd 81 174SC 71817 FOAMEX-A DIV OF KIHI 3086 T-2,4-diisocya 71 1 174SC 62665 DRILUBE COMPANY 3471 Cadmium 20 142 170SJU 283 CHEMICAL WASTE MANAGE4953 Manganese Y 198 169SJU 91 MT POSO COGENERATION 4931 Phosphorus Y 67 165NS 10006015 GEYSERS POWER CO UNIT4911 Beryllium Y 7 27 162GLE 14 GLENN GROWERS 723 Manganese Y 188 161SJU 40032 CHEVRON - COALINGA/KE 1311 Beryllium 6 26 157SJU 122 MALIBU BOATS WEST, INC.3732 MeDiphenDiis 641 157SJU 10427 GALLO GLASS COMPANY 3221 Cadmium Y 18 130 155SC 3317 OWENS-BROCKWAY GLASS3221 Cadmium 18 129 155SC 20000 BELL FOUNDRY CO 3321 Phosphorus 62 153NS 10006026 SANTA ROSA GEOTHERMAL 4961 Manganese 177 152SJU 1820 RIO BRAVO FRESNO 4931 Beryllium Y 6 25 150SC 14759 RIVERSIDE CEMENT CO UN3255 Manganese 174 149

2001NS 10006006 GEYSERS POWER CO UNIT4911 Beryllium Y 6 24 147BUT 36 FAR WEST RICE 723 Manganese 168 144SHA 38 AGGREGATE PRODUCTS (2951 Manganese Y 168 144SJU 50234 SHELL WESTERN E&P INC. 1311 Manganese 167 143AV 118202395 MOUNTAIN HIGH SKI AREA 7999 DieselExhPM Y 4,163 2,123 143FR 9999 B. AFB FAC WIDE 9711 Beryllium Y 6 24 141SHA 40 WHEELABRATOR HUDSON E4931 Manganese Y 164 140SC 800189 DISNEYLAND RESORT 7996 Antimony Y 161 138SC 25513 SIX FLAGS THEMES PARKS 7996 Cadmium 16 115 138VEN 22 HALACO ENGINEERING C 3341 Manganese Y 161 137VEN 1139 VENTURA PORT DISTRICT 1629 DieselExhPM Y 4,010 2,045 137KER 20 LEHIGH SOUTHWEST CEME3241 Cadmium Y 16 113 136NS 10006014 GEYSERS POWER CO UNIT4911 Beryllium Y 6 23 136SB 12 CELITE CORPORATION 3295 Manganese Y 159 136SHA 43 WHEELABRATOR SHASTA E.4931 Manganese Y 158 135SC 68042 CORONA ENERGY PARTNE4923 Glutaraldhyd Y 63 135BA 703 PACIFIC STEEL CASTING 3325 Manganese Y 156 134YS 5 FARMERS' RICE COOPERA 2044 Manganese Y 154 132KER 572 RAND MINING COMPANY 1041 DieselExhPM 3,783 1,929 130NCU 37 SAMOA-PACIFIC CELLULOS2611 Acetaldehyde Y 6,807 31 130NSI 15 COLLINS PINE CO 2421 Cadmium Y 15 107 129SC 74696 TRW TECHNAR INC 3679 Cadmium 15 107 128SC 54627 HICKORY SPRINGS OF CAL3086 T-2,6-diisocya Y 52 1 127SJU 257 CHEVRON USA INC. 1311 Beryllium 5 21 127SC 47859 CACO PACIFIC CORPORAT3544 Glutaraldhyd 59 126LAS 15 H.L. POWER COMPANY 4931 Phosphorus Y 51 126SJU 31 AMETEK-MICROFOAM 3081 Beryllium 5 21 124SJU 20387 DIAMOND WALNUT GROWER5145 Cadmium Y 14 103 123NS 10006016 GEYSERS POWER CO UNIT4911 Beryllium Y 5 20 122BA 30 OWENS-BROCKWAY GLASS4931 Cadmium Y 14 102 122IMP 47 NEW CHARLESTON POWER 4911 Manganese 141 121SC 5638 L.A.PARKERIZING COMPANY3479 Cadmium 14 100 120MEN 100119 MASONITE HARDBRD DIV 2499 Cadmium 14 100 120NSI 3 SIERRA PACIFIC INDUSTRI 2421 Cadmium Y 14 100 120SJU 40128 J.G. BOSWELL OIL MILL 723 Cadmium 14 100 119KER 28 U.S. BORAX 1474 DieselExhPM Y 3,473 1,771 119KER 47 EDWARDS AIR FORCE BAS9711 Phosphorus Y 49 119NS 10006028 NORTHERN CALIFORNIA 4961 Manganese 138 118SC 3771 CROWN CITY FURNITURE MF2511 HexClCycHex 688 1,286 118NS 10006004 GEYSERS POWER CO UNIT4911 Beryllium Y 5 20 117SJU 50140 M.H. WHITTIER, CORPORA 1311 Cadmium 13 96 115YS 6 PIRMI 2044 Manganese Y 132 113SC 43759 LA CO., METROPOLITAN T 4119 Cadmium 13 93 111BUT 21 SUNWEST MILLING CO. IN 723 Manganese 128 110SC 3873 LOCKHEED ADVANCED DE 3728 Cadmium 13 91 110SJU 15 WESTERN COTTON SERVI 2074 Beryllium 4 18 110SAC 1028 THE PALM IRON & BRIDG 3441 Manganese 128 109MBU 25 DUKE ENERGY MOSS LAND4911 Acetaldehyde Y 5,732 26 109SJU 50002 ARCO OIL AND GAS COMP 1311 Phosphorus 45 109YS 256 VERTIS, INC. 2752 Glutaraldhyd Y 50 108SC 6778 INDUSTRIAL ELECTRONIC 3692 TolueneDiisoc 44 1 108KER 47 EDWARDS AIR FORCE BAS9711 ChromiumTriOY 2 318 107SJU 41 ANDERSON CLAYTON CORP2074 Beryllium 4 18 107SC 5960 HKM OF CALIFORNIA KRAS3714 Acetaldehyde 5,591 26 106SD 79 CABRILLO POWER II LLC 4911 Cadmium Y 12 88 106SC 800150 US GOVT., AF DEPT, MAR 9711 1-4,7,8HxCDDY 0 1,576 104

2001SC 21908 SPS TECHNOLOGIES INC 3452 Cadmium 12 87 104SC 13084 BAXTER HEALTHCARE PH 3841 EtO 18,298 2,737 104SJU 33 RANCHERS COTTON OIL 2074 Cadmium 12 87 104NS 10006025 UNOCAL GEOTHERMAL DIV4961 Bromine 1,010 102MOJ 100005 CEMEX - BLACK MOUNTAI 3241 Manganese Y 119 102BA 62 AMERICAN BRASS & IRON 3559 Manganese Y 118 101PLA 44 RIO-BRAVO 4911 Cadmium Y 12 84 101SHA 18 SIERRA PACIFIC IND. - BU 2421 Manganese Y 118 101NS 10006010 GEYSERS POWER CO UNIT4911 Manganese Y 117 101SB 12 CELITE CORPORATION 3295 1,3-Butadiene Y 10,425 3,013 89VEN 1040 AIR NATIONAL GUARD 146 9711 DieselExhPM Y 2,078 1,060 71SHA 2 LEHIGH SOUTHWEST CEME3241 DieselExhPM Y 1,970 1,005 67SC 800180 UNOCAL CHEMICALS DIV, 2821 1,3-Butadiene 6,829 1,974 58SC 800363 TOSCO REFINING COMPA 2911 1,3-Butadiene Y 5,699 1,647 49SC 8547 QUEMETCO INC. 3341 1,3-Butadiene Y 5,312 1,535 45BA 12758 ULTRAMAR INC 2911 1,3-Butadiene Y 3,723 1,076 32SC 2613 US GOVT, NAVY DEPT, N 9711 Cr(VI) Y 30 7,562 25SC 37045 INDUSTRIAL CHEM PROD./ 2899 Cr(VI) 28 7,028 24NS 10006021 SONOMA POWER PLANT 4911 Cr(VI) Y 25 6,490 22SC 73829 CONTAINER-CARE INTERNA2631 Cr(VI) 24 6,120 21SC 800112 ROCKWELL INTERNATION 3721 Cr(VI) 24 6,031 20SC 62281 COASTCAST CORPORATIO3949 Cr(VI) Y 24 6,000 20SC 5645 STANDARD NICKEL CHROM3471 Cr(VI) Y 18 4,515 15SC 58612 G E RAILCAR REPAIR 3479 Cr(VI) 17 4,271 14SC 5944 SPECIALTY FINISHERS CO 2851 Cr(VI) 15 3,825 13SC 35302 OWENS CORNING FIBERGLASS COR2952 Cr(VI) Y 15 3,764 13SJU 21419 THE WINE GROUP INC 2084 Cr(VI) 15 3,726 13SC 71920 CALIFORNIA LEATHER FIN 2843 Cr(VI) 14 3,657 12SD 99 ROHR INDUSTRIES 3728 Cr(VI) Y 12 3,072 10SAC 1110 CHROME CRAFT 3471 Cr(VI) 12 3,000 10SC 12247 ALUMAX MILL PRODUCTS INC3353 Cr(VI) 11 2,899 10SC 800143 UNOCAL 2819 Cr(VI) 11 2,856 10SC 800039 DOUGLAS PRODUCTS DIVISI3728 Cr(VI) 11 2,792 9SC 119127 PRC-DE SOTO INTERNATI 2891 Cr(VI) Y 11 2,695 9KER 21 NATIONAL CEMENT CO 3241 Cr(VI) Y 10 2,650 9SC 18426 RYDER AVIALL, INC 5088 Cr(VI) 10 2,481 8SC 29416 GREAT WESTERN BANK 6035 Cr(VI) 9 2,249 8SC 4329 CUNDIFF STEEL FAB & ER 3441 Cr(VI) 8 2,165 7SC 9496 BENDER MACHINE, INC. 3599 Cr(VI) Y 7 1,902 6SC 14784 LOCKHEED AERONAUTICAL3728 Cr(VI) 7 1,867 6SC 11192 HI-SHEAR CORPORATION 3443 Cr(VI) Y 7 1,850 6SJU 50234 SHELL WESTERN E&P INC. 1311 Cr(VI) 7 1,763 6SC 44577 LONG BEACH CITY, SERR 9199 Cr(VI) Y 7 1,705 6NCU 59 P G & E-HUMBOLDT BAY P 4911 Cr(VI) Y 7 1,663 6IMP 47 NEW CHARLESTON POWER 4911 Cr(VI) 6 1,530 5SC 21497 STAINLESS STEEL PRODUC3444 Cr(VI) 6 1,482 5SJU 211 CHEMEX INC 723 Cr(VI) 6 1,442 5SC 99220 RISTON KELLER INC,THE 3799 Cr(VI) 6 1,403 5KER 20 LEHIGH SOUTHWEST CEME3241 Cr(VI) Y 5 1,392 5SB 12 CELITE CORPORATION 3295 Cr(VI) Y 5 1,304 4SJU 566 LIQUID WASTE MANAGEMEN4953 Cr(VI) 5 1,301 4SC 83482 LORAL AERONUTRONIC C 3728 Cr(VI) 5 1,262 4SC 45372 ARDROX INCORPORATED 2841 Cr(VI) 5 1,262 4SC 19989 PARKER HANNIFIN AEROS 3720 Cr(VI) Y 5 1,244 4SC 800333 DAICO INDUSTRIES 9999 Cr(VI) 5 1,158 4SC 4541 STOODY COMPANY 3496 Cr(VI) 4 1,097 4

2001ED 7 SIERRA PACIFIC INDUSTRI 2421 Cr(VI) Y 4 1,097 4SJU 40026 CERTAINTEED CORPORAT 3296 Cr(VI) Y 4 1,024 3SJU 20755 LIBBEY-OWENS-FORD CO. 3211 Cr(VI) 4 1,023 3SC 25513 SIX FLAGS THEMES PARKS 7996 Cr(VI) 4 1,022 3SC 800089 MOBIL OIL CORP 2911 Cr(VI) Y 4 1,004 3SJU 50098 GOLDEN STATE METALS, I 5093 Asbestos 68 7,288KER 9 CALIFORNIA PORTLAND C 3241 Asbestos Y 60 6,465SC 800075 LA CITY, DWP SCATTERG 4911 Asbestos Y 50 5,329SC 800193 LA CITY, DWP VALLEY GE 4911 Asbestos Y 48 5,168SC 800257 HUGHES AIRCRAFT CO, E 3663 Asbestos Y 47 5,067VEN 21 CANYON ROCK, SAND & G 1442 Asbestos 33 3,564SC 113170 SANTA MONICA HOSPITAL 8011 Asbestos Y 33 3,521SC 17586 CALI-BLOK/EIS BRAKE PA 3292 Asbestos 32 3,445SC 131003 BP WEST COAST PRODUCT2911 Asbestos Y 30 3,230SC 7591 THE BOEING COMPANY 3762 Asbestos Y 29 3,137SJU 50118 CALMAT- INDUSTRIAL ASP 2951 Asbestos 28 3,049SJU 40123 INDUSTRIAL ASPHALT 2951 Asbestos 26 2,816SC 800184 GOLDEN WEST REF CO 2911 Asbestos 16 1,750SC 16660 MCDONNELL DOUGLAS COR3761 Asbestos Y 16 1,679SC 800363 TOSCO REFINING COMPA 2911 Asbestos Y 14 1,534

1996

DIS FACID FNAME FSIC POLABBREV TEMS CANCER CHRONIC ACUTE_S maxTUO 13 SONORA MINING CORP. 1041 Asbestos 2,026 218,100 218,100SJU 625 CALMAT CO. 1446 Asbestos 1,647 177,336 177,336SC 29416 GREAT WESTERN BANK 6035 Chlorine 92,600 79,281 8 79,281SB 9 GREFCO 3295 T-2,4-diisocya 23,913 447 58,496 58,496SJU 50234 SHELL WESTERN E&P INC. 1311 Nickel 15,248 6,739 52,218 44 52,218SJU 211 SANTA FE ENERGY RESOURC1311 Nickel 12,012 5,309 41,138 34 41,138SC 74696 TRW TECHNAR INC 3679 Beryllium 1,608 6,561 39,335 39,335NS 10006011 PG&E UNIT 12 4911 Phosphorus 13,249 32,409 32,409SC 800012 ARCO PRODUCTS CO 2911 Cr(VI) 119 30,221 101 30,221SD 88144 TACTYL TECHNOLOGIES INC3479 TolueneDiisoc 12,328 231 30,157 30,157SC 41229 LUBECO INC 3471 Cr(VI) 111 28,348 95 28,348SJU 40032 CHEVRON - COALINGA/KET 1311 Nickel 8,236 3,640 28,204 24 28,204SJU 40034 CHEVRON USA PRODUCTIO 1311 Nickel 7,670 3,390 26,266 22 26,266SD 99 ROHR INDUSTRIES 3728 Cr(VI) 102 25,925 87 25,925SD 19 NATIONAL STEEL & SHIP 3731 Manganese 30,091 25,763 25,763FR 9999 BEALE AIR FORCE BASE 9711 Nickel 7,021 3,103 24,045 20 24,045SD 249 GENERAL DYNAMICS/CONVAI3724 Cr(VI) 91 23,269 78 23,269SD 19 NATIONAL STEEL & SHIP 3731 Nickel 6,640 2,935 22,741 19 22,741SJU 257 CHEVRON USA INC. 1311 Nickel 6,194 2,738 21,212 18 21,212LAK 60 CLEARLAKE LAVA 1429 Asbestos 194 20,833 20,833SC 15549 A J INDUSTRIES INC, SARGE 3728 Cr(VI) 78 19,890 67 19,890SB 9 GREFCO 3295 Acrolein 6,836 19,509 616 19,509SD 19 NATIONAL STEEL & SHIP 3731 Cr(VI) 75 19,199 64 19,199SC 22551 THUMS LONG BEACH CO, S 1311 Glutaraldhyd 7,950 17,016 17,016NCU 21 SIMPSON PAPER COMPANY 2611 Chlorine 18,885 16,169 2 16,169GBU 5 H.E. HUNEWILL CONSTRUCT 2951 Cr(VI) 62 15,713 53 15,713SC 20451 INTER-COMMUNITY MEDICA 8011 Glutaraldhyd 7,270 15,561 15,561SJU 50140 M.H. WHITTIER, CORPORATI 1311 Nickel 4,501 1,989 15,413 13 15,413KER 328 NAVAL WEAPONS CENTER 9711 ChromiumTriO 110 14,639 4,915 14,639LAK 10 AGGRELITE ROCK COMPAN 1429 Asbestos 134 14,427 14,427SC 69199 BWD CORPORATION 3714 Asbestos 130 14,040 14,040GBU 3050309 CALIFORNIA ENERGY COMPA4961 H2S 810,800 13,884 331 13,884KER 572 RAND MINING COMPANY 1041 Arsenic 2,399 13,460 13,695 216 13,695MEN 100119 MASONITE HARDBRD DIV 2499 Acrolein 4,796 13,688 432 13,688KER 47 AIR FORCE FLIGHT TRAININ 9711 Asbestos 126 13,535 13,535SD 556 EAST COUNTY MATERIAL C 3291 Arsenic 2,321 13,019 13,246 209 13,246SC 46903 CHATSWORTH PLATING CO 3471 StrontiumChr 205 13,069 44 13,069SC 3875 LA CITY, DWP 4941 Cr(VI) 50 12,842 43 12,842SC 6012 MCDONNELL DOUGLAS HELI 3721 Cr(VI) 49 12,521 42 12,521FR 19 SANTA FE MINERALS INC. 1311 Cr(VI) 49 12,465 42 12,465LAK 220 PARNUM PAVING, INC 1442 Asbestos 114 12,220 12,220SJU 10316 DEL MONTE USA PLANT #1 2033 Cr(VI) 46 11,626 39 11,626SC 20564 PACIFIC CLAY PRODUCTS 3255 T-2,4-diisocya 4,734 89 11,580 11,580SLO 76 CALIFORNIA MENS COLONY 9223 Chlorine 13,434 11,502 1 11,502SD 73 SDG & E CO/ENCINA PLANT 4931 Arsenic 1,828 10,254 10,433 165 10,433SC 9729 PGP INDUSTRIES INC 3341 Hydrazine 1,250 10,413 1,070 10,413SC 23589 INTERNATIONAL EXTRUSIO 3354 Cr(VI) 39 10,012 34 10,012SJU 257 CHEVRON USA INC. 1311 H2S 536,912 9,194 219 9,194SC 40328 COOPER DRUM COMPANY 5085 Cr(VI) 36 9,102 31 9,102NS 10006022 COLDWATER CREEK POWER4911 Cr(VI) 36 9,086 31 9,086MBU 122 KCAC INC - MILL 1499 Asbestos 84 9,055 9,055MBU 30 TEXACO, INC 1311 Nickel 2,636 1,165 9,029 8 9,029MEN 100119 MASONITE HARDBRD DIV 2499 Cr(VI) 35 8,925 30 8,925MBU 123 KCAC INC - MINE 1499 Asbestos 82 8,775 8,775GBU 7 UNITED STATES TUNGSTEN 1061 Arsenic 1,526 8,561 8,710 138 8,710

1996

SC 25786 SEVEN-UP/ROYAL CROWN B 2086 Chlorine 10,050 8,604 1 8,604SJU 40208 SANTA FE ENERGY RESOURC1311 Nickel 2,453 1,084 8,402 7 8,402SC 14855 MILLER BREWING CO 2082 Glutaraldhyd 3,785 8,102 8,102SD 344 SOUTHWEST MARINE INC 3732 Cr(VI) 32 8,051 27 8,051SAC 1001 BFI MEDICAL WASTE SYSTE 4953 2-4,6-8HxCDF 1 7,947 527 7,947SC 800150 US GOVT, AF DEPT, MARCH 9711 2,3,7,8-TCDD 0 7,868 521 7,868SD 73 SDG & E CO/ENCINA PLANT 4931 Nickel 2,286 1,010 7,828 7 7,828IMP 15 IMPERIAL IRRIGATION DISTR4911 Chlorine 9,132 7,818 1 7,818SC 4783 LOS ALAMITOS MEDICAL CE 9999 Glutaraldhyd 3,560 7,620 7,620SC 2613 US GOVT, NAVY DEPT,NAVA 9711 Cr(VI) 30 7,562 25 7,562SC 800045 HENKEL CORP., EMERY GR 2899 Nickel 2,189 968 7,497 6 7,497SJU 299 UNOCAL OIL & GAS DIVISION1311 Nickel 2,186 966 7,485 6 7,485SJU 247 MOBIL EXPLORATION AND 1311 Nickel 2,140 946 7,328 6 7,328SJU 50098 GOLDEN STATE METALS, INC5093 Asbestos 68 7,288 7,288SC 800295 HENKEL CORP, EMERY GRO 2819 Nickel 2,120 937 7,260 6 7,260SD 72 SDG & E CO/SOUTH BAY PL 4931 Nickel 2,113 934 7,235 6 7,235SD 73 SDG & E CO/ENCINA PLANT 4931 HCl 379,442 7,219 3 7,219KER 9 CAL PORTLAND CEMENT CO 3241 Asbestos 66 7,108 7,108SC 37045 INDUSTRIAL CHEM PROD./W 2899 Cr(VI) 28 7,028 24 7,028NS 10006021 SMUD GEO I 4911 Cr(VI) 25 6,490 22 6,490SC 50078 JACK FALLUCCA 7532 ChromiumTriO 48 6,365 2,137 6,365IMP 49 J.J. ELMORE 4911 H2S 367,088 6,286 150 6,286VEN 1266 MANSON CONSTRUCTION & 1629 DieselExhPM 12,185 6,214 417 6,214SC 800012 ARCO PRODUCTS CO 2911 Chlorine 7,206 6,169 1 6,169SC 73829 CONTAINER-CARE INTERNAT2631 Cr(VI) 24 6,120 21 6,120SC 800112 ROCKWELL INTERNATIONAL 3721 Cr(VI) 24 6,031 20 6,031NS 10006028 NORTHERN CALIFORNIA PO 4961 Arsenic 1,052 5,900 6,003 95 6,003SC 62281 COASTCAST CORP 3949 Cr(VI) 24 6,000 20 6,000IMP 47 NEW CHARLESTON POWER L4911 Chlorine 6,951 5,951 1 5,951SAC 1 AEROJET 3761 HCl 308,694 5,873 3 5,873FR 19 SANTA FE MINERALS INC. 1311 Chlorine 6,843 5,859 1 5,859SC 13828 CHEVRON USA INC. 1311 Benzene 116,914 5,764 334 2 5,764NCU 21 SIMPSON PAPER COMPANY 2611 Sodium Hydrox 158,860 5,667 340 5,667IMP 50 A. W. HOCH 4911 H2S 329,066 5,635 134 5,635SC 74696 TRW TECHNAR INC 3679 Nickel 1,608 711 5,507 5 5,507IMP 72 SALTON SEA POWER GEN/UN4911 H2S 317,940 5,444 130 5,444SB 2650 UNION ASPHALT 2951 DieselExhPM 10,600 5,406 363 5,406LAK 120 HIDDEN VALLEY SAND AND 1442 Asbestos 49 5,276 5,276KER 21 NATIONAL CEMENT CO 3241 Arsenic 911 5,109 5,198 82 5,198SJU 50234 SHELL WESTERN E&P INC. 1311 Phosphorus 2,112 5,166 5,166SC 57311 HUCK INTERNATIONAL, INC 3452 Chlorine 6,000 5,137 0 5,137TUO 13 SONORA MINING CORP. 1041 Cadmium 595 4,246 5,092 5,092SC 22229 MARTIN METAL FINISHING I 3471 StrontiumChr 80 5,072 17 5,072SLO 13 UNOCAL, SANTA MARIA REF 2911 Nickel 1,405 621 4,812 4 4,812NS 10006021 SMUD GEO I 4911 Phosphorus 1,930 4,721 4,721SC 5645 STANDARD NICKEL CHROMIU3471 Cr(VI) 18 4,515 15 4,515SC 62212 MARK INDUSTRIES 3531 Manganese 5,250 4,495 4,495SC 14759 RIVERSIDE CEMENT CO UNIT3255 Beryllium 184 749 4,493 4,493SC 14833 SAINT JOHN'S HOSPITAL & 8062 Glutaraldhyd 2,084 4,460 4,460SC 800151 US GOVT, AF DEPT, NORTON9711 Glutaraldhyd 2,076 4,443 4,443SB 9 GREFCO 3295 Cr(VI) 17 4,381 15 4,381YS 5010 CALIFORNIA MEDICAL FACIL 9223 Sodium Hydrox 121,618 4,339 260 4,339SJU 247 MOBIL EXPLORATION AND 1311 H2S 252,547 4,324 103 4,324VEN 65 SCE-ORMOND BEACH GEN S4911 Nickel 1,261 558 4,320 4 4,320SC 1220 KOCH FUELS INC, KOCH MA 2951 Glutaraldhyd 2,013 4,308 4,308SC 58612 G E RAILCAR REPAIR 3479 Cr(VI) 17 4,271 14 4,271

1996

SC 800264 EDGINGTON OIL COMPANY 2911 Cr(VI) 16 4,184 14 4,184GLE 1000 JOHNS-MANVILLE 3296 Formaldehyde 71,649 731 4,090 13 4,090ED 7 SIERRA PACIFIC INDUSTRIE 2421 Manganese 4,698 4,022 4,022SC 15504 SCHLOSSER FORGE CO 3728 Nickel 1,132 500 3,877 3 3,877SC 5723 AEROCHEM INC 3471 Perc 381,855 3,830 1,868 0 3,830SC 5944 SPECIALTY FINISHERS CO 2851 Cr(VI) 15 3,825 13 3,825NS 10006010 PG&E UNIT 11 4911 H2S 222,202 3,805 91 3,805KER 21 NATIONAL CEMENT CO 3241 Cr(VI) 15 3,753 13 3,753SJU 21419 THE WINE GROUP INC 2084 Cr(VI) 15 3,726 13 3,726SJU 2149 CHEVRON USA PRODUCTIO 1311 Formaldehyde 65,150 665 3,719 12 3,719MOJ 8600591 USMC A/G COMBAT CENTER 9711 Cr(VI) 14 3,697 12 3,697IMP 51 J.M. LEATHERS 4911 H2S 215,859 3,696 88 3,696SD 118 NUTRASWEET KELCO CO 2099 Propylene Oxi 587,625 3,696 3,354 3 3,696SC 71920 CALIFORNIA LEATHER FINIS 2843 Cr(VI) 14 3,657 12 3,657MOJ 18869 SO CAL GAS CO 4924 Formaldehyde 64,049 653 3,656 12 3,656NS 10006011 PG&E UNIT 12 4911 H2S 211,553 3,622 86 3,622SC 800144 UNION OIL CO OF CAL (NSR 2911 T-2,4-diisocya 1,472 28 3,600 3,600NS 10006022 COLDWATER CREEK POWER4911 Ammonia 4,165,648 3,566 22 3,566VEN 21 CANYON ROCK, SAND & GR 1442 Asbestos 33 3,564 3,564SD 73 SDG & E CO/ENCINA PLANT 4931 Cr(VI) 14 3,497 12 3,497NS 10006022 COLDWATER CREEK POWER4911 Phosphorus 1,424 3,484 3,484SC 44454 STRUCTURAL COMPOSITES I3089 T-2,4-diisocya 1,416 26 3,464 3,464SJU 1130 TEXACO EXPLOR & PRODUCT1311 H2S 202,140 3,461 82 3,461SC 17586 CALI-BLOK/EIS BRAKE PART 3292 Asbestos 32 3,445 3,445NS 10006018 NCPA UNIT 2 4911 Arsenic 603 3,384 3,443 54 3,443MOJ 8400589 US ARMY NATIONAL TRAININ9711 Cadmium 400 2,856 3,425 3,425MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Nickel 990 438 3,392 3 3,392LAK 60 CLEARLAKE LAVA 1429 Cr(VI) 13 3,387 11 3,387SAC 1 AEROJET 3761 Hydrazine 406 3,383 348 3,383VEN 13 SCE-MANDALAY GEN STATI 4911 Nickel 974 431 3,337 3 3,337BUT 39 LOUISIANA PACIFIC CORPO 2611 Formaldehyde 57,884 590 3,304 11 3,304SJU 1246 BERRY PETROLEUM COMPA 1311 Nickel 927 410 3,175 3 3,175SC 24957 GLENDALE CITY 4911 Cr(VI) 12 3,175 11 3,175SJU 20387 DIAMOND WALNUT GROWERS5145 Methyl Bromid 91,400 3,130 0 3,130MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Arsenic 545 3,057 3,111 49 3,111SJU 20890 NEWARK SIERRA PAPERBOA2621 Nickel 906 400 3,103 3 3,103SJU 50118 CALMAT- INDUSTRIAL ASPH 2951 Asbestos 28 3,049 3,049SJU 40026 CERTAINTEED CORPORATIO3296 Formaldehyde 52,888 539 3,019 10 3,019SAC 1110 CHROME CRAFT 3471 Cr(VI) 12 3,000 10 3,000IMP 68 IMPERIAL VALLY RESOUCE 4911 HCl 157,334 2,993 1 2,993SC 14759 RIVERSIDE CEMENT CO UNIT3255 Cadmium 349 2,494 2,990 2,990SLO 8 P G & E-MORRO BAY 4911 Nickel 865 382 2,963 2 2,963MBU 30 TEXACO, INC 1311 Chlorine 3,451 2,955 0 2,955SJU 50178 NAVAL PETROLEUM RESERV1311 Formaldehyde 51,007 520 2,911 9 2,911SC 12247 ALUMAX MILL PRODUCTS IN 3443 Cr(VI) 11 2,899 10 2,899SC 55449 BKK CORPORATION, LANDFIL4953 HCl 152,336 2,898 1 2,898NS 10006025 UNOCAL GEOTHERMAL DIVI 4961 Phosphorus 1,174 2,872 2,872SC 800143 UNOCAL 2819 Cr(VI) 11 2,856 10 2,856SJU 50029 CALIFORNIA CORRECTIONAL9223 Chlorine 3,324 2,846 0 2,846NS 10006028 NORTHERN CALIFORNIA PO 4961 Nickel 830 367 2,843 2 2,843SJU 40123 INDUSTRIAL ASPHALT 2951 Asbestos 26 2,816 2,816SJU 1379 BLUE PACIFIC SPAS 3949 MeDiphenDiis 11,449 2,801 2,801SC 800039 DOUGLAS PRODUCTS DIVIS 3721 Cr(VI) 11 2,792 9 2,792SC 800003 ALLIEDSIGNAL AEROSPACE 3764 Glutaraldhyd 1,295 2,772 2,772SC 13084 BAXTER HEALTHCARE PHAR3841 EtO 18,298 2,737 104 2,737SC 75411 PRECISION SPECIALTY META3312 Cr(VI) 11 2,717 9 2,717

1996

SC 9225 COURTAULDS AEROSPACE I 2891 Cr(VI) 11 2,695 9 2,695VEN 1006 U.S. NAVY-NCBC 9711 Cr(VI) 10 2,635 9 2,635GBU 1 AMERICAN PERLITE COMPA 3295 Manganese 3,070 2,628 2,628SC 95433 ORANGE COUNTY METAL P 3471 Chlorine 3,040 2,603 0 2,603SLO 8 P G & E-MORRO BAY 4911 Phosphorus 1,055 2,581 2,581SLO 13 UNOCAL, SANTA MARIA REF 2911 HCl 134,287 2,555 1 2,555SJU 247 MOBIL EXPLORATION AND 1311 Phosphorus 1,038 2,538 2,538SJU 206 WEST COAST OIL CO. 2911 Nickel 740 327 2,535 2 2,535COL 54 ARKOMA PRODUCTIONS CO 1381 Chlorine 2,956 2,530 0 2,530SD 100 CHEM TRONICS INC 3724 Sodium Hydrox 70,601 2,519 151 2,519SC 800295 HENKEL CORP, EMERY GRO 2819 Cr(VI) 10 2,487 8 2,487SC 18426 RYDER AVIALL, INC 5088 Cr(VI) 10 2,481 8 2,481COL 34 COASTAL OIL & GAS CORP. 1381 Chlorine 2,839 2,431 0 2,431LAK 220 PARNUM PAVING, INC 1442 Cr(VI) 9 2,421 8 2,421PLA 59 AMERICAN POLY-THERM CO. 2821 MeDiphenDiis 9,605 2,350 2,350BA 1190 EVERGREEN OIL, INC 2992 H2S 136,416 2,336 56 2,336SJU 10135 BEATRICE HUNT-WESSON F 2033 Nickel 676 299 2,316 2 2,316SJU 17 BEATRICE HUNT-WESSON F 2033 Nickel 676 299 2,316 2 2,316MOJ 100005 SOUTHDOWN - VICTORVILLE3241 Phosphorus 943 2,308 2,308YS 45 WOODLAND POLY 3079 Acrolein 803 2,293 72 2,293NS 10006006 PG&E UNIT 7 4911 H2S 133,764 2,290 55 2,290SB 47 HOLLY SUGAR - FACTORY 2063 Cr(VI) 9 2,282 8 2,282LAK 10 AGGRELITE ROCK COMPAN 1429 Cr(VI) 9 2,271 8 2,271IMP 47 NEW CHARLESTON POWER L4911 Phosphorus 926 2,265 2,265SC 59571 MULTI-CHEM PROD. INC 2891 T-2,4-diisocya 926 17 2,265 2,265SC 29416 GREAT WESTERN BANK 6035 Cr(VI) 9 2,249 8 2,249SD 73 SDG & E CO/ENCINA PLANT 4931 Beryllium 91 372 2,233 2,233SC 59100 THAKAR ALUMINUM CORP. 3341 HCl 116,505 2,217 1 2,217VEN 65 SCE-ORMOND BEACH GEN S4911 Cr(VI) 9 2,211 7 2,211SC 24812 FARMER BROS CO 2095 Acrolein 774 2,209 70 2,209NS 10006004 PG&E UNIT 5 4911 Manganese 2,569 2,199 2,199SC 15755 CRAIN INDUSTRIES, INC 3086 T-2,4-diisocya 890 17 2,177 2,177SD 73 SDG & E CO/ENCINA PLANT 4931 Mercury 1,141 2,172 11 2,172SC 4329 CUNDIFF STEEL FAB & EREC3441 Cr(VI) 8 2,165 7 2,165FR 18 HARTER PIK'DRITE, INC. 2033 Chlorine 2,500 2,140 0 2,140SD 368 SOLAR TURBINES INC 3511 Cr(VI) 8 2,136 7 2,136MOJ 18869 SO CAL GAS CO 4924 Acrolein 746 2,128 67 2,128SHA 51 BURNEY FOREST PRODUCT 2421 Chlorine 2,440 2,089 0 2,089SC 12247 ALUMAX MILL PRODUCTS IN 3443 HCl 109,016 2,074 1 2,074SC 7458 GOLDENHILL WOOD PROD. 2493 MeDiphenDiis 8,408 2,057 2,057SLO 76 CALIFORNIA MENS COLONY 9223 Glutaraldhyd 953 2,040 2,040SC 800183 PARAMOUNT PETR CORP (EI2911 Nickel 595 263 2,038 2 2,038MOJ 11800001 MITSUBISHI CEMENT 3241 HCl 106,960 2,035 1 2,035IMP 44 VULCAN GEOTHERMAL 4911 H2S 116,746 1,999 48 1,999COL 36 P G & E RESOURCES COMP 1381 Chlorine 2,330 1,995 0 1,995NS 10006007 PG&E UNIT 8 4911 H2S 115,690 1,981 47 1,981SC 800180 UNOCAL CHEMICALS DIV, C 2821 1,3-Butadiene 6,829 1,974 58 1,974SB 9 GREFCO 3295 Formaldehyde 34,449 351 1,966 6 1,966FR 22 P G & E RESOURCES 1311 Chlorine 2,287 1,958 0 1,958BA 22 UNION CHEMICALS 2999 HCl 101,746 1,936 1 1,936BA 31 DOW CHEMICAL COMPANY 2812 Chlorine 2,255 1,930 0 1,930SLO 13 UNOCAL, SANTA MARIA REF 2911 Manganese 2,231 1,910 1,910SC 14784 LOCKHEED AERONAUTICAL S3728 Cr(VI) 7 1,867 6 1,867SC 80066 BP CHEMICALS (HITCO) 3079 Perc 185,455 1,860 907 0 1,860NS 10006008 PG&E UNIT 9 4911 H2S 108,348 1,855 44 1,855IMP 54 AMERICAN GIRL MINE 1041 Arsenic 325 1,823 1,855 29 1,855

1996

IMP 44 VULCAN GEOTHERMAL 4911 Bromine 18,373 1,851 1,851TUO 1 SIERRA PACIFIC INDUSTRIE 2421 Manganese 2,147 1,839 1,839SJU 50037 CHEVRON BITTERWATER PU4612 Nickel 536 237 1,835 2 1,835NCU 37 LOUISIANA-PACIFIC CORP, 2611 Sodium Hydrox 50,739 1,810 109 1,810MOJ 11800001 MITSUBISHI CEMENT 3241 Manganese 2,110 1,807 1,807SJU 257 CHEVRON USA INC. 1311 Phosphorus 733 1,794 1,794BA 31 DOW CHEMICAL COMPANY 2812 HCl 93,458 1,778 1 1,778SJU 50234 SHELL WESTERN E&P INC. 1311 Cr(VI) 7 1,763 6 1,763BA 2300 FLEISCHMANN'S YEAST INC 2099 Acetaldehyde 92,659 425 1,763 1,763KER 20 CALAVERAS CEMENT CO 3241 Mercury 922 1,754 9 1,754VEN 13 SCE-MANDALAY GEN STATI 4911 Cr(VI) 7 1,737 6 1,737SB 1074 SOUTH CUYAMA - HALLADO 1311 Acrolein 605 1,726 55 1,726AV 46476 NORTHROP CORP, SITE 4 3721 Cr(VI) 7 1,724 6 1,724SC 800167 NORTHROP GRUMMAN COR 3721 Cr(VI) 7 1,710 6 1,710IMP 15 IMPERIAL IRRIGATION DISTR4911 Nickel 498 220 1,706 1 1,706SD 2531 WINDOWMASTER PRODUCT 3442 Sodium Hydrox 47,304 1,688 101 1,688SC 800222 TEXACO REFINING & MARKET2819 Cr(VI) 7 1,683 6 1,683SC 800039 DOUGLAS PRODUCTS DIVIS 3721 Perc 166,959 1,675 817 0 1,675SD 146 TELEDYNE RYAN AERONAUT3724 Cr(VI) 7 1,660 6 1,660IMP 45 EARTH ENERGY, INC. 4911 H2S 96,155 1,646 39 1,646NS 10006025 UNOCAL GEOTHERMAL DIVI 4961 H2S 95,652 1,638 39 1,638NS 10006018 NCPA UNIT 2 4911 Nickel 475 210 1,625 1 1,625PLA 5 FORMICA CORPORATION 3083 Manganese 1,891 1,619 1,619VEN 1006 U.S. NAVY-NCBC 9711 Chlorine 1,885 1,614 0 1,614SC 800150 US GOVT, AF DEPT, MARCH 9711 1-4,7,8HxCDD 0 1,576 104 1,576SJU 50130 KERN OIL & REFINING CO. 2911 Nickel 458 202 1,567 1 1,567NCU 59 P G & E-HUMBOLDT BAY PL 4911 Nickel 455 201 1,557 1 1,557SD 180 SIM J HARRIS COMPANY 1429 TolueneDiisoc 631 12 1,544 1,544SC 23907 JOHNS MANVILLE CORP 3296 Formaldehyde 27,011 276 1,542 5 1,542SC 800026 ULTRAMAR INC (NSR USE ON2911 Cr(VI) 6 1,530 5 1,530IMP 47 NEW CHARLESTON POWER L4911 Cr(VI) 6 1,530 5 1,530KER 20 CALAVERAS CEMENT CO 3241 HCl 80,300 1,528 1 1,528SC 800030 CHEVRON U.S.A. INC 2911 Formaldehyde 26,761 273 1,527 5 1,527SJU 257 CHEVRON USA INC. 1311 Formaldehyde 26,531 271 1,514 5 1,514SC 16642 ANHEUSER-BUSCH INC., (L 2082 Acrolein 520 1,484 47 1,484SC 21497 STAINLESS STEEL PRODUCT3444 Cr(VI) 6 1,482 5 1,482KER 28 U.S. BORAX 1474 As cmpd(inorg 259 1,451 1,476 23 1,476MOJ 1500535 PG&E HINKLEY COMPRESSO4922 Formaldehyde 25,858 264 1,476 5 1,476SLO 189 CAL ARMY NATIONAL GUAR 9711 Phosphorus 600 1,468 1,468BA 2180 GAYLORD CONTAINER COR 2631 Formaldehyde 25,445 260 1,452 5 1,452SD 172 SIGNET ARMORLITE INC. 3851 Methylene Chl 853,723 1,451 365 1 1,451SLO 74 PG&E DIABLO CANYON PP 4911 Hydrazine 174 1,449 149 1,449SC 800103 POWERINE OIL CO (EIS USE)2911 Chlorine 1,692 1,448 0 1,448NS 10006009 PG&E UNIT 10 4911 H2S 84,352 1,444 34 1,444SJU 211 SANTA FE ENERGY RESOURC1311 Cr(VI) 6 1,442 5 1,442SC 800026 ULTRAMAR INC (NSR USE ON2911 Nickel 420 186 1,438 1 1,438BUT 9 KOPPERS COMPANY, INC. 2491 Naphthalene 24,783 1,432 472 1,432SC 11192 HI-SHEAR CORP 3443 Cr(VI) 6 1,428 5 1,428NCU 21 SIMPSON PAPER COMPANY 2611 H2S 83,300 1,426 34 1,426SC 14855 MILLER BREWING CO 2082 Chlorine 1,662 1,423 0 1,423KER 21 NATIONAL CEMENT CO 3241 Cadmium 164 1,173 1,407 1,407SJU 1737 VINTAGE PETROLEUM INC 1311 Acrolein 492 1,403 44 1,403SC 99220 RISTON KELLER INC,THE S 3799 Cr(VI) 6 1,403 5 1,403KER 20 CALAVERAS CEMENT CO 3241 Cr(VI) 5 1,394 5 1,394SC 1464 COACHELLA VALLEY WATER 4941 Chlorine 1,590 1,361 0 1,361SC 16865 AMVAC CHEMICAL CORP 2879 Chlorine 1,565 1,340 0 1,340

1996

BA 1438 NEW UNITED MOTOR MANU 3711 EGBE 154,350 1,321 0 1,321SC 74696 TRW TECHNAR INC 3679 Sodium Hydrox 36,841 1,314 79 1,314SC 44577 LONG BEACH CITY, SERRF 9199 Mercury 688 1,309 7 1,309BA 13 TOSCO CORP, AVON REFIN 2911 1,3-Butadiene 4,503 1,301 39 1,301SJU 566 LIQUID WASTE MANAGEMENT4953 Cr(VI) 5 1,301 4 1,301SD 19 NATIONAL STEEL & SHIP 3731 Copper 18,214 1,300 3 1,300SB 2630 SANTA BARBARA AEROSPA 4581 StrontiumChr 20 1,289 4 1,289SC 3771 CROWN CITY FURNITURE M 2521 HexClCycHexa 688 1,286 118 1,286MBU 25 P G & E 4911 Formaldehyde 22,316 228 1,274 4 1,274SAC 1 AEROJET 3761 Chlorine 1,484 1,271 0 1,271SB 1919 PACIFIC SCIENTIFIC 3812 Cr(VI) 5 1,268 4 1,268SC 7427 OWENS-BROCKWAY GLASS 3221 Nickel 369 163 1,265 1 1,265SC 83482 LORAL AERONUTRONIC CO 3728 Cr(VI) 5 1,262 4 1,262SC 45372 ARDROX INCORPORATED 2841 Cr(VI) 5 1,262 4 1,262SJU 40224 SHELL WESTERN E & P INC. 1311 Nickel 365 162 1,251 1 1,251SJU 228 DDRW TRACY SITE 971 Chlorine 1,460 1,250 0 1,250SC 167 INDUSTRIAL ASPHALT, COA 2951 Chlorine 1,460 1,250 0 1,250COL 33 TRITON OIL & GAS CORP. 1381 Chlorine 1,459 1,250 0 1,250COL 43 PIRELLI CABLE CORPORATI 364 Copper 17,300 1,234 3 1,234SC 800038 DOUGLAS PRODUCTS DIVIS 3721 Acrolein 431 1,229 39 1,229NS 10006022 COLDWATER CREEK POWER4911 Cadmium 142 1,014 1,216 1,216BA 13 TOSCO CORP, AVON REFIN 2911 Benzene 24,507 1,208 70 0 1,208SC 3949 MICRODOT INC, KAYNAR M 3452 Perc 119,483 1,198 585 0 1,198SC 24957 GLENDALE CITY 4911 Acrolein 418 1,194 38 1,194SJU 20283 POSDEF POWER COMPANY 4931 Manganese 1,390 1,190 1,190SC 9496 BENDER MACHINE INC 3599 Cr(VI) 5 1,186 4 1,186GBU 7 UNITED STATES TUNGSTEN 1061 H2S 69,179 1,185 28 1,185SHA 44 DICALITE CORP. 1481 Manganese 1,369 1,172 1,172SJU 40214 SHELL OIL - KETTLEMAN PU 4612 Nickel 340 150 1,164 1 1,164SJU 50229 SHELL OIL WASCO PUMP ST 4612 Nickel 340 150 1,164 1 1,164KER 21 NATIONAL CEMENT CO 3241 Mercury 611 1,162 6 1,162SC 57041 HITEK PRODUCT FINISHING, 3479 T-2,4-diisocya 475 9 1,162 1,162SC 800333 DAICO INDUSTRIES 9999 Cr(VI) 5 1,158 4 1,158NCU 96 FAIRHAVEN POWER COMPA 4911 Manganese 1,344 1,151 1,151LAK 290 CALPINE - CALISTOGA GEO 4911 H2S 66,870 1,145 27 1,145BA 15 EXXON CORPORATION 2911 Nickel 333 147 1,140 1 1,140SD 478 SOUTHWEST MARINE INC 3731 Cr(VI) 4 1,138 4 1,138SC 39945 LOCKHEED MARTIN AIRCRAF4581 Cr(VI) 4 1,137 4 1,137SC 4548 SUNLAW COGENERATION PA4931 Formaldehyde 19,907 203 1,136 4 1,136SJU 50308 TEXACO USA, VENTURA PR 1311 H2S 66,009 1,130 27 1,130SC 891 VALLEY TODECO CO, DIV L 3429 Perc 112,180 1,125 549 0 1,125SD 3680 SD CITY WSTE WATER TRTM4952 Formaldehyde 19,682 201 1,123 4 1,123SJU 50251 TEXACO REFINING & MARKE 9411 Benzene 22,438 1,106 64 0 1,106SJU 247 MOBIL EXPLORATION AND 1311 Formaldehyde 19,244 196 1,098 4 1,098SC 800127 SO CAL GAS CO (EIS USE) 4923 Formaldehyde 19,242 196 1,098 4 1,098MOJ 1500039 PG&E TOPOCK COMPRESSO4922 Formaldehyde 19,238 196 1,098 4 1,098SC 4541 STOODY COMPANY 3496 Cr(VI) 4 1,097 4 1,097ED 7 SIERRA PACIFIC INDUSTRIE 2421 Cr(VI) 4 1,097 4 1,097NS 10006005 PG&E UNIT 6 4911 Manganese 1,276 1,092 1,092IMP 71 SALTON SEA POWER GEN/UN4911 H2S 63,072 1,080 26 1,080SJU 40123 INDUSTRIAL ASPHALT 2951 Chlorine 1,260 1,079 0 1,079SC 800012 ARCO PRODUCTS CO 2911 Benzene 21,622 1,066 62 0 1,066SC 5973 SO CAL GAS CO 4923 Formaldehyde 18,675 190 1,066 3 1,066SD 4845 USN NAV STA 9711 Naphthalene 18,357 1,061 349 1,061SAC 112 GRAFIL INC 2824 HCN 55,607 1,058 3 1,058KER 572 RAND MINING COMPANY 1041 HCl 55,581 1,057 0 1,057

1996

BA 41 OWENS CORNING 3296 Formaldehyde 18,520 189 1,057 3 1,057SD 935 FRAZEE PAINT 2851 Cr(VI) 4 1,056 4 1,056SC 45448 GAS RECOVERY SYSTEMS, I 1389 Nickel 305 135 1,045 1 1,045SJU 10316 DEL MONTE USA PLANT #1 2033 Nickel 304 134 1,041 1 1,041SJU 211 SANTA FE ENERGY RESOURC1311 Arsenic 180 1,012 1,029 16 1,029SD 4845 USN NAV STA 9711 Cr(VI) 4 1,027 3 1,027SJU 40026 CERTAINTEED CORPORATIO3296 Cr(VI) 4 1,024 3 1,024SJU 20755 LIBBEY-OWENS-FORD CO. 3211 Cr(VI) 4 1,023 3 1,023SC 25513 SIX FLAGS THEMES PARKS I 7996 Cr(VI) 4 1,022 3 1,022SC 5140 COMPOSITE STRUCTURES 3479 Cr(VI) 4 1,020 3 1,020SJU 20921 OWENS-BROCKWAY GLASS 3221 HCl 53,525 1,018 0 1,018NS 10006020 NCPA UNIT 4 4911 H2S 59,183 1,013 24 1,013VEN 15 PROCTER & GAMBLE PAPER 2676 Chlorine 1,179 1,010 0 1,010SJU 50305 MOBIL 1311 Acrolein 353 1,008 32 1,008SC 800041 DOW CHEM U.S.A. (NSR USE 2821 Acrylonitrile 2,045 1,008 70 1,008MBU 25 P G & E 4911 Nickel 292 129 1,001 1 1,001SJU 50002 ARCO OIL AND GAS COMPA 1311 Nickel 292 129 999 1 999MOJ 6900004 COOLWATER GENERATING S4911 Formaldehyde 17,334 177 989 3 989PLA 5 FORMICA CORPORATION 3083 Cr(VI) 4 984 3 984SHA 15 ROSEBURG FOREST PRODUC2421 Manganese 1,148 983 983KER 9 CAL PORTLAND CEMENT CO 3241 Beryllium 40 164 983 983PLA 28 SIERRAPINE LTD - ROCKLIN 2436 Formaldehyde 17,190 175 981 3 981SC 10005 ELECTRONIC CHROME GRI 3471 Cr(VI) 4 977 3 977SD 167 SOLAR TURBINES INC 3511 Nickel 285 126 976 1 976PLA 28 SIERRAPINE LTD - ROCKLIN 2436 Cr(VI) 4 969 3 969SD 99 ROHR INDUSTRIES 3728 Perc 96,196 965 471 0 965LAS 11 CALIF CORRECTIONAL CEN 9223 Nickel 279 123 956 1 956SAC 64 SACRAMENTO ARMY DEPOT 9711 Cr(VI) 4 955 3 955SC 800012 ARCO PRODUCTS CO 2911 Nickel 279 123 954 1 954SC 6129 ROBINSON HELICOPTER CO 4522 Cr(VI) 4 951 3 951AV 5084 ROCKWELL NORTH AMERICA3761 Cr(VI) 4 949 3 949MOJ 500364 MOLYCORP, UNION OIL 1009 Chlorine 1,107 948 0 948MEN 100119 MASONITE HARDBRD DIV 2499 Formaldehyde 16,582 169 946 3 946SC 14759 RIVERSIDE CEMENT CO UNIT3255 Arsenic 165 928 945 15 945SC 800144 UNION OIL CO OF CAL (NSR 2911 Nickel 275 121 940 1 940SD 118 NUTRASWEET KELCO CO 2099 Chlorine 1,094 937 0 937SC 800181 CALIFORNIA PORTLAND CE 3273 Nickel 271 120 929 1 929NS 10006021 SMUD GEO I 4911 Cadmium 108 768 921 921SC 800151 US GOVT, AF DEPT, NORTON9711 Cr(VI) 4 918 3 918SD 167 SOLAR TURBINES INC 3511 Cr(VI) 4 917 3 917SC 44454 STRUCTURAL COMPOSITES I3089 Cr(VI) 4 914 3 914SC 18439 ACE PLATING CO INC 3471 1,1,2TriClEtha 33,586 914 914SJU 50177 NAVAL PETROLEUM RESERV1311 Formaldehyde 15,954 163 911 3 911NS 10006004 PG&E UNIT 5 4911 H2S 53,170 910 22 910SC 800259 BOEING NO AMERICAN, INC, 3764 Cr(VI) 4 907 3 907GBU 3050309 CALIFORNIA ENERGY COMPA4961 Cadmium 106 754 905 905SC 11217 ALLIED-SIGNAL AEROSPACE 3769 Cr(VI) 4 903 3 903SC 7730 CARPENTER CO 3086 T-2,4-diisocya 369 7 902 902SJU 40125 INDUSTRIAL ASPHALT 2951 Manganese 1,049 898 898SC 8873 ATCHISON,TOPEKA& SANTA 4011 Cr(VI) 4 893 3 893SC 44577 LONG BEACH CITY, SERRF 9199 HCl 46,716 889 0 889SC 6430 W & F MFG INC 3444 Urethane 1,797 886 886KER 328 NAVAL WEAPONS CENTER 9711 Cr(VI) 3 885 3 885SC 800167 NORTHROP GRUMMAN COR 3721 Perc 88,193 885 431 0 885SJU 40032 CHEVRON - COALINGA/KET 1311 Cr(VI) 3 874 3 874SJU 33 RANCHERS COTTON OIL 2074 Cr(VI) 3 871 3 871

1996

NS 10006016 PG&E UNIT 20 4911 H2S 50,828 870 21 870SC 7254 DIVERSEY CORP. 2841 Chlorine 1,015 869 0 869NSI 15 COLLINS PINE CO 2421 Manganese 1,013 867 867KER 21 NATIONAL CEMENT CO 3241 Nickel 252 111 864 1 864SC 800128 SO CAL GAS CO (EIS USE) 4923 Formaldehyde 15,001 153 856 3 856KER 9 CAL PORTLAND CEMENT CO 3241 Manganese 997 853 853YS 5010 CALIFORNIA MEDICAL FACIL 9223 Phosphoric Ac 34,799 851 851SJU 1737 VINTAGE PETROLEUM INC 1311 Formaldehyde 14,853 152 848 3 848SB 3105 PLATFORM HOLLY 1311 H2S 49,439 847 20 847LAK 120 HIDDEN VALLEY SAND AND 1442 Cr(VI) 3 846 3 846SD 100 CHEM TRONICS INC 3724 Perc 84,212 845 412 0 845SC 42743 WESTERN MOULDINGS 3449 Perc 84,000 843 411 0 843SJU 299 UNOCAL OIL & GAS DIVISION1311 Phosphorus 342 836 836IMP 43 HEBER GEOTHERMAL 4911 H2S 48,734 834 20 834VEN 41 AERA ENERGY LLC 1311 Acrolein 292 832 26 832NS 10006018 NCPA UNIT 2 4911 Asbestos 8 832 832NS 10006022 COLDWATER CREEK POWER4911 Mercury 437 832 4 832SJU 50306 MOBIL 1311 Acrolein 288 822 26 822GBU 1 AMERICAN PERLITE COMPA 3295 Nickel 239 105 817 1 817SJU 224 PHYSICS INTERNATIONAL 8711 Cr(VI) 3 816 3 816SJU 40034 CHEVRON USA PRODUCTIO 1311 Cr(VI) 3 811 3 811SJU 257 CHEVRON USA INC. 1311 Benzene 16,453 811 47 0 811BA 12 PACIFIC GAS & ELECTRIC CO4931 Formaldehyde 14,177 145 809 3 809SC 20197 LAC/USC MEDICAL CENTER 8062 Cr(VI) 3 806 3 806MOJ 8800567 NAVAL WEAPONS CENTER 4961 HCl 42,190 803 0 803TUO 13 SONORA MINING CORP. 1041 Arsenic 140 787 801 13 801TUO 1 SIERRA PACIFIC INDUSTRIE 2421 Arsenic 140 785 799 13 799MOJ 8400589 US ARMY NATIONAL TRAININ9711 Manganese 933 799 799SJU 232 NAVAL COMMUNICATION ST 9711 Nickel 232 103 795 1 795KER 28 U.S. BORAX 1474 Manganese 925 792 792SC 29110 ORANGE, COUNTYOF - SANI 4953 Chlorine 922 789 0 789NS 10006005 PG&E UNIT 6 4911 H2S 46,056 789 19 789IMP 51 J.M. LEATHERS 4911 Arsenic 138 774 787 12 787BA 591 EAST BAY MUNICIPAL UTILIT 4952 Acrolein 276 787 25 787SC 45448 GAS RECOVERY SYSTEMS, I 1389 Manganese 917 785 785SB 6451 LUCAS AVIATION - SANTA M 3721 Cr(VI) 3 785 3 785SD 73 SDG & E CO/ENCINA PLANT 4931 Cadmium 91 652 782 782SC 35418 INDUSTRIAL ASPHALT 2951 Manganese 909 778 778SC 800003 ALLIEDSIGNAL AEROSPACE 3764 Cr(VI) 3 776 3 776SC 15842 TELEDYNE CASTING SERVIC3369 StrontiumChr 12 776 3 776TUO 13 SONORA MINING CORP. 1041 Nickel 226 100 775 1 775SC 8206 ENTERPRISE SALES CO. 2899 HCl 40,614 773 0 773SHA 164 PG&E BURNEY COMPRESSO 4922 Formaldehyde 13,420 137 766 2 766SC 18241 PACIFIC STEEL TREATING 3399 Perc 76,294 765 373 0 765MEN 100119 MASONITE HARDBRD DIV 2499 Nickel 222 98 760 1 760MOJ 5400246 AEROCHEM INC 3728 Perc 75,500 757 369 0 757BUT 36 FAR WEST RICE 723 Cr(VI) 3 755 3 755SLO 328 BAILEY BRIDGES INC. 3479 Cr(VI) 3 755 3 755SD 72 SDG & E CO/SOUTH BAY PL 4931 Arsenic 132 742 755 12 755SC 42220 SAN BERN. CO, CRESTLINE 9511 Chlorine 880 753 0 753SJU 50054 CITY OF TULARE 9511 H2S 43,990 753 18 753VEN 1139 VENTURA PORT DISTRICT 1629 DieselExhPM 1,474 752 50 752SC 11193 BRUNSWICK CORP, DEFENSE3761 Chlorine 864 740 0 740PLA 28 SIERRAPINE LTD - ROCKLIN 2436 Manganese 859 735 735MBU 158 TRI CAL INC. 2879 Methyl Bromid 21,414 733 0 733NS 10006012 PG&E UNIT 14 4911 H2S 42,658 730 17 730

1996

NS 10006021 SMUD GEO I 4911 Beryllium 30 122 729 729KER 572 RAND MINING COMPANY 1041 HCN 38,322 729 2 729SJU 11125 VARCO PRUDEN BUILDINGS 3448 Manganese 848 726 726SHA 2 CALAVERAS CEMENT COMP 3241 Formaldehyde 12,700 130 725 2 725MOJ 8300565 AIR FORCE FLIGHT TEST C 9711 HCl 37,921 721 0 721SC 11435 THE PQ CORP 2819 Cr(VI) 3 721 2 721SJU 40139 J.R. SIMPLOT COMPANY 2819 Ammonia 838,549 718 4 718SB 3322 PINAL LEASE 1311 Formaldehyde 12,572 128 718 2 718BA 13 TOSCO CORP, AVON REFIN 2911 Formaldehyde 12,532 128 715 2 715MOJ 500364 MOLYCORP, UNION OIL 1009 Manganese 829 710 710VEN 997 NAVAL AIR WEAPONS STATI 9711 Cr(VI) 3 707 2 707SC 55380 SANTEE DAIRIES INC 2026 Chlorine 825 706 0 706SC 59100 THAKAR ALUMINUM CORP. 3341 Manganese 824 706 706SB 1301 CHEVRON USA INC 1311 Phosphorus 287 702 702SC 104017 AERA ENERGY LLC 1311 Formaldehyde 12,294 125 702 2 702SJU 50308 TEXACO USA, VENTURA PR 1311 Formaldehyde 12,288 125 701 2 701SB 3322 PINAL LEASE 1311 Acrolein 245 700 22 700TUO 12 PACIFIC-ULTRAPOWER CHIN2421 Manganese 815 698 698NS 10006022 COLDWATER CREEK POWER4911 Beryllium 28 116 697 697NCU 47 LOUISIANA-PACIFIC CORP, 2493 Formaldehyde 12,111 124 691 2 691SJU 211 SANTA FE ENERGY RESOURC1311 Phosphorus 282 690 690SC 14324 AMERON PROTECTIVE COAT2851 Cr(VI) 3 687 2 687SC 14759 RIVERSIDE CEMENT CO UNIT3255 Nickel 200 89 686 1 686IMP 45 EARTH ENERGY, INC. 4911 Arsenic 120 674 686 11 686NCU 97 ULTRAPOWER 3 4911 Manganese 801 686 686SC 18378 GRUBER SYS INC 3089 Nickel 200 88 685 1 685KER 21 NATIONAL CEMENT CO 3241 Manganese 798 683 683SD 72 SDG & E CO/SOUTH BAY PL 4931 Cadmium 79 566 679 679SB 3887 BONNEVILLE PACIFIC CORP 4911 Chlorine 791 677 0 677SB 1021 BONNEVILLE PACIFIC - COG 4911 Chlorine 791 677 0 677SC 83753 STOCKER RESOURCES INC 1311 Benzene 13,724 677 39 0 677BA 778 SAN JOSE/SANTA CLARA WA4952 Ammonia 788,048 675 4 675SC 46268 CALIFORNIA STEEL INDUSTR3312 HCl 35,378 673 0 673YS 39 HUNT WESSON, INC 723 Chlorine 784 671 0 671SJU 247 MOBIL EXPLORATION AND 1311 1,3-Butadiene 2,320 671 20 671SJU 247 MOBIL EXPLORATION AND 1311 Benzene 13,571 669 39 0 669SC 99119 INTERPLASTIC CORP 2821 Maleic Anhydr 2,729 668 668NS 10006015 PG&E UNIT 18 4911 H2S 38,973 667 16 667NCU 21 SIMPSON PAPER COMPANY 2611 Benzene 13,528 667 39 0 667ED 27 S. L. TAHOE PUB. UTILITY DI 4952 Chlorine 778 666 0 666SHA 23 SIMPSON PAPER CO. 2611 Sodium Hydrox 18,600 664 40 664SB 2630 SANTA BARBARA AEROSPA 4581 ChromiumTriO 5 660 222 660SC 800020 BUILDERS BRASS WKS CORP 3366 Perc 65,600 658 321 0 658NCU 60 THE PACIFIC LUMBER COM 2421 Manganese 768 658 658SJU 40165 PPG INDUSTRIES INC. 3211 HCl 34,507 657 0 657VEN 137 WESTERN FARM SERVICE 2875 Phosphorus 268 656 656SJU 40161 PG&E KETTLEMAN COMPRES4931 Formaldehyde 11,440 117 653 2 653SC 22128 AEROJET ORDNANCE CO 2892 Cr(VI) 3 653 2 653GLE 43 MOBIL EXPL'N & PROD'G U.S.1311 Benzene 13,157 649 38 0 649SLO 8 P G & E-MORRO BAY 4911 Cr(VI) 3 647 2 647SD 72 SDG & E CO/SOUTH BAY PL 4931 Beryllium 26 108 646 646SC 800089 MOBIL OIL CORP (EIS USE) 2911 Mercury 339 645 3 645SC 800113 ROHR,INC 3728 Phosphoric Ac 26,298 643 643MOJ 50001051 ACE COGENERATION 4911 Acrolein 225 643 20 643NS 10006020 NCPA UNIT 4 4911 Ammonia 749,090 641 4 641SC 800127 SO CAL GAS CO (EIS USE) 4923 Acrolein 224 639 20 639

1996

SC 14191 NIKLOR CHEMICAL COMPANY2879 Chloropicrin 1,493 639 1 639MOJ 50001051 ACE COGENERATION 4911 Manganese 745 638 638KER 9 CAL PORTLAND CEMENT CO 3241 HCl 33,400 635 0 635SC 51736 WEST COAST COGENERATIO1629 HCl 33,384 635 0 635BA 3523 UNIVERSAL FOODS CORP 2099 Acetaldehyde 33,325 153 634 634SB 1074 SOUTH CUYAMA - HALLADO 1311 Formaldehyde 11,091 113 633 2 633PLA 44 RIO-BRAVO 4911 Manganese 738 632 632SJU 257 CHEVRON USA INC. 1311 Cr(VI) 2 629 2 629IMP 50 A. W. HOCH 4911 Arsenic 110 617 627 10 627MOJ 100005 SOUTHDOWN - VICTORVILLE3241 Cadmium 73 522 626 626IMP 50 A. W. HOCH 4911 Benzene 12,578 620 36 0 620SJU 1820 RIO BRAVO FRESNO 4931 Chlorine 724 620 0 620VEN 65 SCE-ORMOND BEACH GEN S4911 HCl 32,428 617 0 617IMP 49 J.J. ELMORE 4911 DieselExhPM 1,209 617 41 617SC 5973 SO CAL GAS CO 4923 Acrolein 216 616 19 616TEH 39 PG & E GERBER COMPRESS 4923 Formaldehyde 10,780 110 615 2 615SC 14784 LOCKHEED AERONAUTICAL S3728 Perc 61,200 614 299 0 614SHA 39 SIERRA PACIFIC 2421 Manganese 716 613 613SJU 15 WESTERN COTTON SERVICE2074 Nickel 179 79 612 1 612SC 18294 NORTHROP GRUMMAN CORP3721 Cr(VI) 2 612 2 612SHA 15 ROSEBURG FOREST PRODUC2421 Cr(VI) 2 612 2 612LAS 4 SIERRA PACIFIC IND 2421 Manganese 710 608 608MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Beryllium 25 101 608 608SHA 44 DICALITE CORP. 1481 Cr(VI) 2 604 2 604SD 72 SDG & E CO/SOUTH BAY PL 4931 HCl 31,726 604 0 604COL 49 PG&E DELEVAN COMPRESSO4923 Formaldehyde 10,547 108 602 2 602SB 3211 CAT CANYON (BELL LEASE) 1311 Acrolein 211 602 19 602SJU 31 AMETEK-MICROFOAM 3081 Cadmium 70 500 600 600GBU 2013 TWIN MOUNTAIN ROCK CO 1411 Cr(VI) 2 599 2 599SJU 41 ANDERSON CLAYTON CORP/O2074 Nickel 174 77 596 0 596IMP 51 J.M. LEATHERS 4911 Bromine 5,901 594 594MBU 11 RMC LONESTAR INDUST CM 3241 Mercury 311 592 3 592NCU 21 SIMPSON PAPER COMPANY 2611 Formaldehyde 10,311 105 589 2 589SC 6770 W.C. RICHARDS COMPANY 2851 Cr(VI) 2 587 2 587IMP 65 ORMESA 1 4911 Phosphorus 239 584 584BUT 12 BALDWIN CONTRACTING C 3295 Cr(VI) 2 583 2 583SJU 50228 SHELL OIL MID PUMPING ST 4612 Nickel 170 75 582 0 582SC 3873 LOCKHEED ADVANCED DEV 3728 Cr(VI) 2 581 2 581SC 3563 FOURTH STREET ROCK CR 3295 DieselExhPM 1,139 581 39 581SJU 10666 MODESTO IRRIGATION DIST 4911 Chlorine 677 580 0 580SC 7855 KNOTT'S BERRY FARM 7996 Chlorine 677 579 0 579KER 47 AIR FORCE FLIGHT TRAININ 9711 Lead Chromat 14 579 2 579SC 55380 SANTEE DAIRIES INC 2026 Glutaraldhyd 270 578 578IMP 47 NEW CHARLESTON POWER L4911 Ammonia 674,286 577 4 577SJU 50037 CHEVRON BITTERWATER PU4612 Cr(VI) 2 574 2 574BUT 9 KOPPERS COMPANY, INC. 2491 Manganese 661 566 566BA 148 BALL METAL CONTAINER G 3411 EGBE 65,787 563 0 563SC 800223 TEXACO REF & MARKETING 2911 Nickel 164 73 563 0 563SAC 67 BLUE DIAMOND GROWERS 2099 Cr(VI) 2 561 2 561SD 368 SOLAR TURBINES INC 3511 Nickel 163 72 560 0 560SC 14784 LOCKHEED AERONAUTICAL S3728 Asbestos 5 559 559GLE 1000 JOHNS-MANVILLE 3296 Glutaraldhyd 261 559 559SC 17301 ORANGE, COUNTY OF - SAN 4959 Formaldehyde 9,715 99 555 2 555VEN 65 SCE-ORMOND BEACH GEN S4911 Phosphorus 227 554 554BA 11 SHELL MARTINEZ REFINING 2911 Formaldehyde 9,702 99 554 2 554SJU 2149 CHEVRON USA PRODUCTIO 1311 Acrolein 193 552 17 552

1996

SJU 20890 NEWARK SIERRA PAPERBOA2621 Cr(VI) 2 551 2 551SC 1756 FANSTEEL INC. PRECISION 3728 Sodium Hydrox 15,437 551 33 551SC 24755 PACIFIC AIRMOTIVE CORP 4581 Acrolein 193 550 17 550LAK 230 CALPINE UNIT 13: POWER/S 4911 Ammonia 642,000 550 3 550SC 800030 CHEVRON U.S.A. INC 2911 Nickel 159 70 546 0 546SC 15755 CRAIN INDUSTRIES, INC 3086 T-2,6-diisocya 223 4 545 545SB 3211 CAT CANYON (BELL LEASE) 1311 Formaldehyde 9,555 97 545 2 545SC 800026 ULTRAMAR INC (NSR USE ON2911 HCN 28,358 540 1 540SJU 50234 SHELL WESTERN E&P INC. 1311 Arsenic 94 529 538 8 538KER 47 AIR FORCE FLIGHT TRAININ 9711 StrontiumChr 8 536 2 536SC 13711 R.E. ATCKINSON CO. INC. 3728 Cr(VI) 2 536 2 536SJU 1222 DOPACO INC 2657 Maleic Anhydr 2,189 535 535SC 19027 INTERCEM CORP 9999 Glutaraldhyd 250 535 535BA 732 JEFFERSON SMURFIT CORP 2631 Formaldehyde 9,355 95 534 2 534VEN 13 SCE-MANDALAY GEN STATI 4911 Acrolein 187 534 17 534BA 5966 CRAIN INDUSTRIES 3079 TolueneDiisoc 218 4 533 533VEN 1384 TRANSCO PRODUCTS INC. 3679 Cr(VI) 2 529 2 529MOJ 50001051 ACE COGENERATION 4911 Phosphorus 214 524 524BA 17 KAISER CEMENT CORPORAT3241 Benzene 10,631 524 30 0 524SJU 40032 CHEVRON - COALINGA/KET 1311 Phosphorus 213 522 522SJU 17 BEATRICE HUNT-WESSON F 2033 Manganese 609 521 521SC 800089 MOBIL OIL CORP (EIS USE) 2911 Benzene 10,561 521 30 0 521SC 14963 GRIFFITH MICRO SCIENCE, I 2099 EtO 3,424 512 20 512BA 11 SHELL MARTINEZ REFINING 2911 Cr(VI) 2 511 2 511SC 45448 GAS RECOVERY SYSTEMS, I 1389 Cr(VI) 2 510 2 510SHA 38 AGGREGATE PRODUCTS CO 2951 Cr(VI) 2 510 2 510SC 457 LA CO DEPT HEALTH SRV,U 8052 Glutaraldhyd 238 509 509COL 128 THE TEMO COMPNAY 1311 Chlorine 595 509 0 509MOJ 1200003 RIVERSIDE CEMENT COMPA 3241 Mercury 267 508 3 508MBU 25 P G & E 4911 Phosphorus 206 504 504NCU 59 P G & E-HUMBOLDT BAY PL 4911 Phosphorus 205 502 502SJU 40128 J.G. BOSWELL OIL MILL 723 Cr(VI) 2 500 2 500SC 800128 SO CAL GAS CO (EIS USE) 4923 Acrolein 175 499 16 499SC 800089 MOBIL OIL CORP (EIS USE) 2911 Nickel 145 64 496 0 496BA 51 UNITED AIRLINES, MAINTEN 4581 Formaldehyde 8,681 89 496 2 496SC 14759 RIVERSIDE CEMENT CO UNIT3255 Mercury 260 494 2 494IMP 77 NAVAL AIR FACILITY, EL CE 9711 DieselExhPM 966 493 33 493LAS 16 MT. LASSEN POWER 4931 Manganese 575 492 492SHA 42 BURNEY MOUNTAIN POWER 4931 Manganese 575 492 492NCU 21 SIMPSON PAPER COMPANY 2611 Naphthalene 8,518 492 162 492SD 478 SOUTHWEST MARINE INC 3731 Nickel 143 63 490 0 490SC 800134 SUN EXPLORATION & PROD C1311 Formaldehyde 8,540 87 487 2 487SAC 1126 PRECISION PLATING & GRIN 3471 Cr(VI) 2 487 2 487NS 10006012 PG&E UNIT 14 4911 Manganese 569 487 487SC 2631 RAM PRODUCTION CORP. 2851 Cr(VI) 2 485 2 485SJU 40034 CHEVRON USA PRODUCTIO 1311 Phosphorus 198 484 484SC 2405 NI INDUSTRIES, INC.,NORRIS3483 Chlorine 564 483 0 483SJU 40034 CHEVRON USA PRODUCTIO 1311 Acrolein 169 481 15 481MOJ 900002 IMC CHEMICALS, INC. 2819 Formaldehyde 8,412 86 480 2 480SJU 50234 SHELL WESTERN E&P INC. 1311 Mercury 252 479 2 479SJU 50058 CONTINENTAL GRAIN COMP 723 Cr(VI) 2 478 2 478IMP 53 GEO EAST MESA 4911 H2S 27,884 477 11 477SC 65979 ALUMINEX FINISHING INC 3444 Cr(VI) 2 477 2 477SC 15647 CUSTOM ENAMELERS INC 3479 Cr(VI) 2 477 2 477IMP 54 AMERICAN GIRL MINE 1041 HCN 25,053 477 1 477VEN 13 SCE-MANDALAY GEN STATI 4911 HCl 25,047 477 0 477

1996

SC 41229 LUBECO INC 3471 Manganese 552 473 473SD 194 HOTEL DEL CORONADO 7011 Formaldehyde 8,272 84 472 2 472SC 800089 MOBIL OIL CORP (EIS USE) 2911 Ammonia 549,591 471 3 471SJU 20283 POSDEF POWER COMPANY 4931 Cr(VI) 2 470 2 470SC 45489 GUIDANT INC 3845 Cr(VI) 2 469 2 469SB 4216 CASMALIA IC ENGINES 1311 Nickel 136 60 464 0 464SC 42333 AMERICAN NATIONAL CAN C 3471 Arsenic 81 454 462 7 462COL 50 MCGILL AND SHEPHERD 1381 Chlorine 540 462 0 462NS 10006018 NCPA UNIT 2 4911 H2S 26,947 461 11 461SC 18426 RYDER AVIALL, INC 5088 Perc 45,941 461 225 0 461SJU 50035 CHAPARRAL PETROLEUM IN 1311 Toluene 806,120 460 0 460SC 57038 GWF POWER SYSTEMS;ORW4923 Formaldehyde 8,044 82 459 1 459SLO 57 UNION OIL COMPANY OF CA 1311 Acrolein 161 459 14 459SHA 13 ROSEBURG FOREST PRODUC2421 Manganese 536 459 459SC 47056 MYERS CONTAINER CORP, I 3412 EGBE 53,276 456 0 456NS 10006011 PG&E UNIT 12 4911 Manganese 532 455 455SC 71817 FOAMEX-A DIV OF KIHI 3086 Methylene Chl 267,774 455 115 0 455SLO 57 UNION OIL COMPANY OF CA 1311 Formaldehyde 7,930 81 453 1 453SAC 125 CAL CENTRAL PRESS 2752 Cr(VI) 2 451 2 451LAK 240 CALPINE UNIT 16: POWER/S 4911 Ammonia 526,120 450 3 450MBU 54 OGDEN POWER PACIFIC INC 4953 Formaldehyde 7,879 80 450 1 450SC 81620 RAPID TRANSIT DIST, METR 9999 Cr(VI) 2 449 2 449NS 10006020 NCPA UNIT 4 4911 Mercury 236 448 2 448SJU 50029 CALIFORNIA CORRECTIONAL9223 Lead Chromat 11 448 2 448SC 5645 STANDARD NICKEL CHROMIU3471 Perc 44,456 446 217 0 446MBU 117 HADCO CORP TECH CENTER 3672 Sulfuric Acid 2,578 441 0 441SC 63470 CENTURY COMPOSITES 3089 Cr(VI) 2 440 1 440IMP 49 J.J. ELMORE 4911 Arsenic 77 432 440 7 440SB 3020 CASMALIA FEE 1311 Nickel 128 57 440 0 440BA 16 TOSCO RODEO REFINERY 2911 Cr(VI) 2 440 1 440MOJ 100005 SOUTHDOWN - VICTORVILLE3241 Benzene 8,861 437 25 0 437LAK 160 HOMESTAKE MINING COMP 1041 Mercury 229 436 2 436TUO 1 SIERRA PACIFIC INDUSTRIE 2421 Formaldehyde 7,629 78 435 1 435NS 10006008 PG&E UNIT 9 4911 Manganese 508 435 435SJU 50002 ARCO OIL AND GAS COMPA 1311 Arsenic 76 427 435 7 435SC 48300 PRECISION TUBE BENDING 3498 Perc 43,180 433 211 0 433SC 20197 LAC/USC MEDICAL CENTER 8062 Chlorine 504 432 0 432SJU 20890 NEWARK SIERRA PAPERBOA2621 Phosphorus 176 432 432SC 62589 SUNCLIPSE INC, CORRU-KRA2653 Acrolein 151 431 14 431VEN 13 SCE-MANDALAY GEN STATI 4911 Phosphorus 175 428 428SC 4477 SO CAL EDISON CO 4911 Cr(VI) 2 427 1 427SC 51811 AURORA MODULAR INDUSTR3448 Benzene 8,595 424 25 0 424SC 62897 NORTHROP GRUMMAN CORP3721 Formaldehyde 7,389 75 422 1 422SC 18294 NORTHROP GRUMMAN CORP3721 4,4'-MeDianilin 532 416 5 416SJU 20283 POSDEF POWER COMPANY 4931 HCl 21,754 414 0 414VEN 1006 U.S. NAVY-NCBC 9711 Beryllium 17 69 413 413SHA 2 CALAVERAS CEMENT COMP 3241 Nickel 120 53 413 0 413SC 19989 PARKER HANNIFIN AEROSP 3721 Cr(VI) 2 413 1 413SC 20144 CANON BUSINESS MACHINES3861 HCl 21,637 412 0 412SD 5056 CONTINENTAL MARITIME 3731 Cr(VI) 2 411 1 411SC 104017 AERA ENERGY LLC 1311 Acrolein 144 411 13 411SC 800223 TEXACO REF & MARKETING 2911 Formaldehyde 7,195 73 411 1 411SC 800181 CALIFORNIA PORTLAND CE 3273 Formaldehyde 7,190 73 410 1 410SB 2658 UNION OIL COMPANY OF CA.1311 Formaldehyde 7,156 73 408 1 408SJU 50308 TEXACO USA, VENTURA PR 1311 Acrolein 143 408 13 408NS 10006009 PG&E UNIT 10 4911 Manganese 475 407 407

1996

SJU 257 CHEVRON USA INC. 1311 Acrolein 142 406 13 406SHA 51 BURNEY FOREST PRODUCT 2421 Benzene 8,232 406 23 0 406SC 2405 NI INDUSTRIES, INC.,NORRIS3483 Cr(VI) 2 405 1 405SC 800103 POWERINE OIL CO (EIS USE)2911 Benzene 8,211 405 23 0 405SC 14759 RIVERSIDE CEMENT CO UNIT3255 Cr(VI) 2 404 1 404SJU 50177 NAVAL PETROLEUM RESERV1311 Benzene 8,165 403 23 0 403IMP 72 SALTON SEA POWER GEN/UN4911 Benzene 8,162 402 23 0 402SJU 11053 TRI-VALLEY GROWERS PLAN2033 Nickel 117 52 401 0 401SC 46837 SIMPSON PAPER CO @ COG 2621 Chlorine 468 401 0 401NS 10006008 PG&E UNIT 9 4911 Ammonia 467,600 400 3 400NS 10006022 COLDWATER CREEK POWER4911 Copper 5,598 399 1 399SC 5960 HKM OF CALIFORNIA KRASN 3714 Acrolein 140 398 13 398BA 10 CHEVRON PRODUCTS COMP2911 H2S 23,264 398 9 398SC 4242 SAN DIEGO GAS & ELECTRI 4931 Formaldehyde 6,957 71 397 1 397SC 7730 CARPENTER CO 3086 T-2,6-diisocya 162 3 397 397BA 11 SHELL MARTINEZ REFINING 2911 Benzene 8,043 397 23 0 397SC 800275 CHEMOIL REFINING CORP. 2911 Cr(VI) 2 395 1 395SD 301 ROHR INC 3399 Perc 39,256 394 192 0 394KER 328 NAVAL WEAPONS CENTER 9711 Sodium Hydrox 11,025 393 24 393BA 30 OWENS-BROCKWAY GLASS 3221 Cadmium 46 326 391 391SC 2405 NI INDUSTRIES, INC.,NORRIS3483 Sodium Hydrox 10,911 389 23 389SC 10924 SHERATON PLAZA LA REINA 7011 Chlorine 454 389 0 389BA 218 UNITED CAN COMPANY 3411 EGEE 158,828 389 7 389SJU 40164 PIRELLI ARMSTRONG TIRE 3011 Acrolein 136 388 12 388BA 15 EXXON CORPORATION 2911 Ammonia 452,110 387 2 387SHA 39 SIERRA PACIFIC 2421 Cr(VI) 2 383 1 383SC 800059 GMAD (EIS USE) 3711 Methylene Chl 223,800 380 96 0 380MOJ 100006 SOUTHDOWN - VICTORVILLE3241 Cr(VI) 1 377 1 377SC 800223 TEXACO REF & MARKETING 2911 Cr(VI) 1 375 1 375NS 10006009 PG&E UNIT 10 4911 Ammonia 436,497 374 2 374NCU 37 LOUISIANA-PACIFIC CORP, 2611 Formaldehyde 6,540 67 373 1 373SC 800125 SO CAL EDISON CO 4911 Formaldehyde 6,522 67 372 1 372SC 800144 UNION OIL CO OF CAL (NSR 2911 Cadmium 43 307 368 368NS 10006021 SMUD GEO I 4911 Nickel 107 47 366 0 366SC 800241 SHELL WESTERN E&P INC 1311 Formaldehyde 6,356 65 363 1 363BA 621 CITY OF SANTA CLARA, ELE 4941 Formaldehyde 6,324 65 361 1 361SC 14191 NIKLOR CHEMICAL COMPANY2879 Methyl Bromid 10,513 360 0 360SC 6929 LEACH CORP, RELAY GROU 3679 Perc 35,757 359 175 0 359SJU 50245 SUNLAND REFINING CORPO 2911 Benzene 7,273 359 21 0 359SJU 20528 GENERAL MILLS, INC. 2043 Phosphorus 146 358 358SC 57329 KWIKSET CORP 3444 Perc 35,658 358 174 0 358SC 22410 PALACE PLATING 3471 Chlorine 417 357 0 357SJU 31 AMETEK-MICROFOAM 3081 Cr(VI) 1 357 1 357BUT 39 LOUISIANA PACIFIC CORPO 2611 Cr(VI) 1 357 1 357MOJ 8701177 USMC LOGISTICS BASE - NE 9711 Lead Chromat 9 356 1 356SJU 50234 SHELL WESTERN E&P INC. 1311 Beryllium 15 59 356 356SC 55077 ADVANCED COATING & SILK 3479 Cr(VI) 1 354 1 354MOJ 8400589 US ARMY NATIONAL TRAININ9711 Copper 4,958 354 1 354SJU 211 SANTA FE ENERGY RESOURC1311 H2S 20,647 354 8 354SJU 50178 NAVAL PETROLEUM RESERV1311 Benzene 7,169 353 20 0 353PLA 5 FORMICA CORPORATION 3083 Cadmium 41 294 352 352SC 800026 ULTRAMAR INC (NSR USE ON2911 Benzene 7,136 352 20 0 352SD 229 PRUDENTIAL OVERALL SUP 7218 Perc 35,046 352 171 0 352NSI 1 SIERRA PACIFIC INDUSTRIE 2421 Manganese 410 351 351SC 800012 ARCO PRODUCTS CO 2911 Cadmium 41 292 351 351SJU 20921 OWENS-BROCKWAY GLASS 3221 Cadmium 41 292 350 350

1996

BA 1179 REDWOOD LANDFILL INC 4953 Ammonia 407,622 349 2 349SC 24957 GLENDALE CITY 4911 Nickel 102 45 349 0 349MOJ 18500760 SIERRA AGGREGATE COMP 1499 Cr(VI) 1 347 1 347IMP 44 VULCAN GEOTHERMAL 4911 Arsenic 61 340 346 5 346YS 6 PIRMI 2044 Cr(VI) 1 345 1 345SD 501 DEUTSCH COMPANY 3643 Cr(VI) 1 343 1 343GLE 43 MOBIL EXPL'N & PROD'G U.S.1311 Formaldehyde 6,001 61 343 1 343SC 1615 GREAT WESTERN CARPET C3069 Fluorocarb(Cl) 1,400,100 342 342SC 88551 FOAMEX INTERNATIONAL, I 3086 Fluorocarb(Cl) 1,400,100 342 342SC 4344 KUSTOM FIT MFG CO 2531 TolueneDiisoc 140 3 342 342SC 57311 HUCK INTERNATIONAL, INC 3452 Sodium Hydrox 9,600 342 21 342SC 7427 OWENS-BROCKWAY GLASS 3221 HCl 17,951 342 0 342SJU 211 SANTA FE ENERGY RESOURC1311 Mercury 179 341 2 341SAC 67 BLUE DIAMOND GROWERS 2099 Phosphine 1,591 341 341SC 54627 HICKORY SPRINGS OF CAL I 3089 T-2,4-diisocya 139 3 340 340SJU 50147 MCFARLAND ENERGY, INC. 1311 Acrolein 119 340 11 340SC 1836 UNION OIL CO OF CALIFORN 1311 Acrolein 119 339 11 339SJU 40149 M.H. WHITTIER CORPORATI 1311 H2S 19,794 339 8 339SD 4824 USN AIR STATION-MIRAMAR 9711 Barium Chrom 7 339 1 339VEN 65 SCE-ORMOND BEACH GEN S4911 Arsenic 59 332 338 5 338MOJ 900002 IMC CHEMICALS, INC. 2819 As cmpd(inorg 59 331 337 5 337SD 72 SDG & E CO/SOUTH BAY PL 4931 Cr(VI) 1 337 1 337IMP 46 SANTA FE PACIFIC GOLD CO 1041 HCN 17,705 337 1 337MOJ 3100068 SOUTHERN CALIFORNIA GA 4923 Formaldehyde 5,884 60 336 1 336MBU 19 AERA ENERGY LLC 1311 H2S 19,530 334 8 334YS 45 WOODLAND POLY 3079 Formaldehyde 5,826 59 333 1 333VEN 33 LA CONCHITA OIL & GAS PL 1311 Formaldehyde 5,814 59 332 1 332SC 42333 AMERICAN NATIONAL CAN C 3471 Cr(VI) 1 332 1 332SAC 1 AEROJET 3761 Cr(VI) 1 330 1 330SD 88176 SD CTY/OTAY ANNEX LANDF 4953 Acrylonitrile 669 330 23 330SC 8582 SO CAL GAS CO 4923 Formaldehyde 5,772 59 329 1 329BA 10 CHEVRON PRODUCTS COMP2911 Benzene 6,662 328 19 0 328SC 3525 P.B. FASTENERS 3452 Perc 32,732 328 160 0 328SJU 50140 M.H. WHITTIER, CORPORATI 1311 Beryllium 13 55 328 328SC 45623 LAWSON HUGHES CO., INC 3312 Manganese 383 327 327SJU 50305 MOBIL 1311 Benzene 6,626 327 19 0 327SHA 51 BURNEY FOREST PRODUCT 2421 Formaldehyde 5,712 58 326 1 326SB 12 CELITE CORPORATION 3295 Cr(VI) 1 325 1 325BUT 43 PACIFIC COAST PRODUCER 2033 ChlorineDioxid 1,136 324 324SC 800202 UNIVERSAL STUDIOS INC (E 7812 Cr(VI) 1 324 1 324SD 5867 NELSON & SLOAN 1429 Manganese 378 323 323NCU 21 SIMPSON PAPER COMPANY 2611 HCl 16,970 323 0 323NCU 37 LOUISIANA-PACIFIC CORP, 2611 Nickel 94 42 322 0 322BA 22 UNION CHEMICALS 2999 Mercury 169 321 2 321NCU 8 SIERRA PACIFIC, IND. 2421 Manganese 375 321 321ED 27 S. L. TAHOE PUB. UTILITY DI 4952 Cr(VI) 1 321 1 321SD 27 ESCONDIDO READY MIX 3272 Manganese 374 320 320SC 19572 ARTISTIC BRASS 3432 Perc 31,932 320 156 0 320GLE 1000 JOHNS-MANVILLE 3296 Ammonia 371,652 318 2 318KER 47 AIR FORCE FLIGHT TRAININ 9711 ChromiumTriO 2 318 107 318SC 100844 MEDALLION CALIFORNIA PR 1311 Formaldehyde 5,570 57 318 1 318MOJ 18869 SO CAL GAS CO 4924 Benzene 6,443 318 18 0 318SJU 50308 TEXACO USA, VENTURA PR 1311 Benzene 6,436 317 18 0 317SD 8621 CARLSON & BEAULOYE 3471 Cr(VI) 1 317 1 317COL 22 MOBIL EXPLORATION & PR 1381 Chlorine 370 317 0 317SC 8547 QUEMETCO INC 3341 Arsenic 55 311 317 5 317

1996

SC 47232 ARCO CQC KILN 2999 Manganese 370 317 317PLA 13 GEORGIA PACIFIC CORPOR 2421 Mercury 165 314 2 314KER 328 NAVAL WEAPONS CENTER 9711 HCl 16,444 313 0 313SJU 40042 CITY OF FRESNO, PUBLIC 4952 Ammonia 363,047 311 2 311BA 31 DOW CHEMICAL COMPANY 2812 CCl4 4,352 311 19 0 311SC 8547 QUEMETCO INC 3341 Nickel 91 40 311 0 311SB 4140 SBRC - BUILDINGS 1/2/3/6 3812 Cadmium 36 259 310 310SJU 211 SANTA FE ENERGY RESOURC1311 Beryllium 13 52 310 310TUO 15 SIERRA PACIFIC INDUSTRIE 2421 Manganese 363 310 310YS 36 PORT OF SACRAMENTO 4491 Manganese 361 309 309SD 164 FENTON H G MATERIAL CO 1429 Manganese 361 309 309MOJ 19901418 HELENDALE WASTEWATER 4952 Chlorine 360 308 0 308SJU 50182 OXY USA INC. 1311 Nickel 90 40 307 0 307LAK 160 HOMESTAKE MINING COMP 1041 Beryllium 13 51 307 307SC 102075 FOAMEX INTERNATIONAL IN 3086 1,1,1-TCA 1,785,004 306 0 306SJU 534 DOLE DRIED FRUIT & NUT C 2068 Methyl Bromid 8,925 306 0 306SC 62281 COASTCAST CORP 3949 Nickel 89 39 305 0 305BA 148 BALL METAL CONTAINER G 3411 EGEE 124,450 304 6 304SHA 42 BURNEY MOUNTAIN POWER 4931 Nickel 88 39 302 0 302SJU 50002 ARCO OIL AND GAS COMPA 1311 Formaldehyde 5,276 54 301 1 301BA 2371 USS-POSCO INDUSTRIES 3312 Cr(VI) 1 301 1 301SC 14833 SAINT JOHN'S HOSPITAL & 8062 Sodium Hydrox 8,427 301 18 301SJU 15 WESTERN COTTON SERVICE2074 Cr(VI) 1 300 1 300BA 6012 CROWN CORK & SEAL COM 3411 EGBE 35,055 300 0 300SC 53610 LA CO., METROPOLITAN TR 4111 Cadmium 35 250 300 300SC 38971 RICOH ELECTRONICS INC 3579 Perc 29,820 299 146 0 299SAC 1 AEROJET 3761 EDC 8,364 299 4 299SC 15842 TELEDYNE CASTING SERVIC3369 Naphthalene 5,165 299 98 299SC 73899 OREGON STEEL MILLS-FONT3312 Cadmium 35 248 298 298SAC 67 BLUE DIAMOND GROWERS 2099 Cadmium 35 248 298 298SJU 50140 M.H. WHITTIER, CORPORATI 1311 H2S 17,392 298 7 298NS 10006024 AIDLIN GEOTHERMAL PROJ 4911 H2S 17,365 297 7 297BA 778 SAN JOSE/SANTA CLARA WA4952 Formaldehyde 5,202 53 297 1 297MOJ 28300919 LAC MINERALS (COLOSSEUM1041 Cr(VI) 1 296 1 296SD 6257 LF GEN PARTNERS/SYCAMO 4931 Acrylonitrile 600 296 21 296SC 53610 LA CO., METROPOLITAN TR 4111 HCl 15,487 295 0 295BUT 39 LOUISIANA PACIFIC CORPO 2611 Manganese 344 295 295SC 75411 PRECISION SPECIALTY META3312 Nickel 86 38 294 0 294SB 3083 UNION SUGAR LEASE 1311 Acrolein 103 294 9 294SHA 23 SIMPSON PAPER CO. 2611 Chlorine 343 294 0 294SC 81892 FOAMEX INTERNATIONAL IN 3086 T-2,4-diisocya 120 2 294 294SJU 299 UNOCAL OIL & GAS DIVISION1311 Cr(VI) 1 293 1 293SHA 23 SIMPSON PAPER CO. 2611 Formaldehyde 5,131 52 293 1 293SJU 41 ANDERSON CLAYTON CORP/O2074 Cr(VI) 1 292 1 292NS 10006026 SANTA ROSA GEOTHERMAL C4961 H2S 17,025 292 7 292SC 22360 PCA METAL FINISHING, INC 3471 p-DiClBenzen 15,586 291 3 291SC 37045 INDUSTRIAL CHEM PROD./W 2899 Sodium Hydrox 8,160 291 17 291SC 91368 KAISER MARQUARDT @ EXH3724 Cr(VI) 1 291 1 291SJU 50308 TEXACO USA, VENTURA PR 1311 Naphthalene 5,016 290 95 290SJU 40224 SHELL WESTERN E & P INC. 1311 Acrolein 101 289 9 289MOJ 8700587 USMC LOGISTICS BASE - Y 9711 Lead Chromat 7 287 1 287SJU 50124 KAWEAH RIVER ROCK CO. 1442 Cr(VI) 1 286 1 286NS 10006007 PG&E UNIT 8 4911 Manganese 334 286 286SC 7010 PRUDENTIAL OVERALL SUP 7219 Perc 28,486 286 139 0 286SC 17473 MECH METAL FINISHING CO 3599 Sodium Hydrox 7,985 285 17 285SB 3083 UNION SUGAR LEASE 1311 Formaldehyde 4,977 51 284 1 284

1996

SC 800134 SUN EXPLORATION & PROD C1311 Acrolein 99 284 9 284SJU 20283 POSDEF POWER COMPANY 4931 Nickel 83 37 283 0 283SJU 40208 SANTA FE ENERGY RESOURC1311 Phosphorus 115 283 283YS 5 FARMERS' RICE COOPERATI 2044 Methyl Bromid 8,225 282 0 282BA 10 CHEVRON PRODUCTS COMP2911 Cr(VI) 1 281 1 281SC 913 ALL-BANN ENTER. INC 3499 ChromiumTriO 2 281 94 281SC 40829 HAWKER PACIFIC INC 3599 Cr(VI) 1 280 1 280SC 43759 LA CO., METROPOLITAN TR 4100 HCl 14,713 280 0 280SJU 1246 BERRY PETROLEUM COMPA 1311 Phosphorus 114 279 279IMP 54 AMERICAN GIRL MINE 1041 1,3-Butadiene 966 279 8 279SJU 40128 J.G. BOSWELL OIL MILL 723 Nickel 81 36 279 0 279SC 18931 TAMCO 2759 Manganese 325 278 278SC 800144 UNION OIL CO OF CAL (NSR 2911 Ammonia 324,415 278 2 278SC 42157 ELLIOTT'S DESIGNS INC 2519 Manganese 324 277 277MOJ 100005 SOUTHDOWN - VICTORVILLE3241 Cr(VI) 1 277 1 277SC 61209 AKZO NOBEL CHEM INC, FIL 2819 Ammonia 323,000 277 2 277FR 16004 SUNSWEET GROWERS INC. 723 Methyl Bromid 8,070 276 0 276SAC 3082 SIERRA SUEDE & LEATHER 7216 Perc 27,553 276 135 0 276SC 16299 AMERIGAS PROPANE L.P. 1311 Formaldehyde 4,839 49 276 1 276SAC 1041 UC DAVIS MEDICAL CENTER 8062 EtO 1,843 276 11 276SC 800318 GRISWOLD INDUSTRIES 3494 Cr(VI) 1 275 1 275NS 10006022 COLDWATER CREEK POWER4911 Benzene 5,577 275 16 0 275SHA 51 BURNEY FOREST PRODUCT 2421 Manganese 321 274 274SC 24957 GLENDALE CITY 4911 Beryllium 11 46 274 274NS 10006022 COLDWATER CREEK POWER4911 H2S 16,011 274 7 274BA 62 AMERICAN BRASS & IRON 3321 Manganese 319 273 273TUO 1 SIERRA PACIFIC INDUSTRIE 2421 Nickel 79 35 271 0 271KER 28 U.S. BORAX 1474 DieselExhPM 531 271 18 271LAS 4 SIERRA PACIFIC IND 2421 Nickel 79 35 271 0 271SJU 40042 CITY OF FRESNO, PUBLIC 4952 H2S 15,800 271 6 271SC 29416 GREAT WESTERN BANK 6035 Nickel 79 35 270 0 270VEN 41 AERA ENERGY LLC 1311 Formaldehyde 4,728 48 270 1 270SB 2658 UNION OIL COMPANY OF CA.1311 Acrolein 95 270 9 270SC 21976 OLD QUAKER PAINT COMPA 2851 Mercury 142 270 1 270NS 10006026 SANTA ROSA GEOTHERMAL C4961 Phosphorus 110 269 269SAC 3035 DRY CLEAN TODAY 7216 Perc 26,812 269 131 0 269IMP 44 VULCAN GEOTHERMAL 4911 Benzene 5,454 269 16 0 269BA 41 OWENS CORNING 3296 Ammonia 312,678 268 2 268SJU 50046 CHEVRON USA LOST HILLS 1321 Formaldehyde 4,680 48 267 1 267IMP 54 AMERICAN GIRL MINE 1041 Cadmium 31 221 265 265SC 102684 HUCK INTERNATIONAL - DE 3452 Sodium Hydrox 7,414 264 16 264SC 61063 K.M. RECORDS, INCORPORA 3931 Nickel 77 34 264 0 264VEN 13 SCE-MANDALAY GEN STATI 4911 Arsenic 46 259 264 4 264SD 99 ROHR INDUSTRIES 3728 1,4-Dioxane 20,098 263 1 0 263SC 14052 SO CAL EDISON CO 4911 Formaldehyde 4,603 47 263 1 263SD 1537 PILKINGTON/BARNES HIND 3851 Fluorocarb(Cl) 1,071,334 262 262SC 5673 RELIANCE UPHOLSTERY SU 5087 T-2,4-diisocya 107 2 262 262FR 19002 CUSTOM CHROME & BUMPE 3471 Sulfuric Acid 1,530 262 0 262SJU 40208 SANTA FE ENERGY RESOURC1311 Cr(VI) 1 262 1 262KER 20 CALAVERAS CEMENT CO 3241 Benzene 5,291 261 15 0 261SD 6531 CAPE COMPOSITES INC. 5031 Methylene Chl 153,154 260 66 0 260SC 61209 AKZO NOBEL CHEM INC, FIL 2819 Chlorine 304 260 0 260SD 271 PALOMAR PLATING COMPAN3511 Cr(VI) 1 260 1 260SC 800068 HUGHES AIRCRAFT CO (EIS 3761 T-2,4-diisocya 106 2 259 259BA 710 UNITED TECHNOLOGIES CO 3764 HCl 13,616 259 0 259IMP 71 SALTON SEA POWER GEN/UN4911 Benzene 5,238 258 15 0 258

1996

SC 1718 NATTER MFG COMPANY 3469 Nickel 75 33 257 0 257SJU 239 TRACY PUMP STATION 4612 Nickel 75 33 256 0 256SC 8015 ANADITE INC 3471 Perc 25,483 256 125 0 256NCU 59 P G & E-HUMBOLDT BAY PL 4911 Cr(VI) 1 255 1 255SC 800012 ARCO PRODUCTS CO 2911 Ammonia 298,253 255 2 255NSI 3 SIERRA-PACIFIC INDUST. 2421 Chlorine 298 255 0 255SC 23967 ROHR IND INC 3728 Cr(VI) 1 255 1 255SC 51838 COMMERCIAL INSPECTION 8734 Cr(VI) 1 253 1 253SB 48 BATTLES OIL & GAS PLANT 1321 Acrolein 89 253 8 253SJU 15 WESTERN COTTON SERVICE2074 Cadmium 29 210 252 252BA 32 PACIFIC REFINING COMPAN 2911 Benzene 5,115 252 15 0 252SC 8547 QUEMETCO INC 3341 Cadmium 29 210 252 252NS 10006006 PG&E UNIT 7 4911 Manganese 295 252 252SD 4835 USN HOSPITAL 9711 EtO 1,685 252 10 252SC 800223 TEXACO REF & MARKETING 2911 Chlorine 293 251 0 251SB 27 CARPIN. OIL/GAS - CHEV 1311 Acrolein 88 251 8 251SC 800223 TEXACO REF & MARKETING 2911 Manganese 293 250 250SC 81892 FOAMEX INTERNATIONAL IN 3086 Methylene Chl 146,995 250 63 0 250SC 102075 FOAMEX INTERNATIONAL IN 3086 T-2,4-diisocya 102 2 250 250MBU 11 RMC LONESTAR INDUST CM 3241 Formaldehyde 4,347 44 248 1 248MOJ 11800001 MITSUBISHI CEMENT 3241 Formaldehyde 4,336 44 248 1 248NS 10006016 PG&E UNIT 20 4911 Manganese 289 247 247SC 20375 PRUDENTIAL OVERALL SUP 7218 Perc 24,621 247 120 0 247SC 10069 BAZZ-HOUSTON CO 3493 Perc 24,557 246 120 0 246FR 9999 BEALE AIR FORCE BASE 9711 Manganese 288 246 246BA 1148 COIT DRAPERY & CARPET 7216 Perc 24,522 246 120 0 246SJU 41 ANDERSON CLAYTON CORP/O2074 Cadmium 29 205 245 245SC 62665 DRILUBE COMPANY 3471 Perc 24,350 244 119 0 244SJU 40139 J.R. SIMPLOT COMPANY 2819 Chlorine 285 244 0 244BA 591 EAST BAY MUNICIPAL UTILIT 4952 Formaldehyde 4,275 44 244 1 244SC 69677 COLUMBIA PACIFIC ALUMIN 3341 Manganese 285 244 244SJU 247 MOBIL EXPLORATION AND 1311 HCl 12,772 243 0 243SAC 110 P G & E 4922 Formaldehyde 4,257 43 243 1 243MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Cadmium 28 203 243 243BA 541 PACIFIC GAS & ELECTRIC C 4922 Formaldehyde 4,254 43 243 1 243SC 800030 CHEVRON U.S.A. INC 2911 Manganese 283 242 242YS 5155 CHIRON CORPORATION 2834 Sulfuric Acid 1,409 241 0 241SJU 33 RANCHERS COTTON OIL 2074 Nickel 70 31 241 0 241SJU 10666 MODESTO IRRIGATION DIST 4911 Nickel 70 31 241 0 241SC 800216 INT'L LIGHT METALS CORPO 3365 Cr(VI) 1 241 1 241SJU 50046 CHEVRON USA LOST HILLS 1321 Acrolein 84 240 8 240NS 10006023 COLDWATER CREEK POWER4911 Chlorine 281 240 0 240SC 800113 ROHR,INC 3728 Sodium Hydrox 6,716 240 14 240PLA 59 AMERICAN POLY-THERM CO. 2821 T-2,4-diisocya 97 2 238 238SC 54177 PARK STEEL COMPANY INC 3441 Manganese 278 238 238SC 11362 HR TEXTRON INC 3728 Cr(VI) 1 237 1 237SJU 50308 TEXACO USA, VENTURA PR 1311 Acetaldehyde 12,451 57 237 237SC 1329 FRICTION MATERIALS CO OF3714 Cr(VI) 1 237 1 237SD 271 PALOMAR PLATING COMPAN3511 StrontiumChr 4 237 1 237IMP 67 ORMESA 1E 4911 Phosphorus 96 236 236SC 11986 ASTECH 3471 Perc 23,345 234 114 0 234SC 800144 UNION OIL CO OF CAL (NSR 2911 Mercury 123 234 1 234MEN 100119 MASONITE HARDBRD DIV 2499 Manganese 273 234 234BA 10 CHEVRON PRODUCTS COMP2911 Ammonia 271,163 232 1 232SC 69677 COLUMBIA PACIFIC ALUMIN 3341 Cr(VI) 1 232 1 232SC 8724 CAL BUMPER CO INC 3471 Sodium Hydrox 6,494 232 14 232

1996

NS 10006024 AIDLIN GEOTHERMAL PROJ 4911 Mercury 122 231 1 231SC 4242 SAN DIEGO GAS & ELECTRI 4931 Acrolein 81 231 7 231SD 517 UCSD/CAMPUS 8221 Chlorine 270 231 0 231NSI 1 SIERRA PACIFIC INDUSTRIE 2421 Cadmium 27 193 231 231SJU 50040 CHEVRON RIO BRAVO STAT 4612 Cr(VI) 1 231 1 231BUT 41 RANCHO ESQUON, INC RICE 723 Cr(VI) 1 230 1 230PLA 59 AMERICAN POLY-THERM CO. 2821 Barium Chrom 5 230 1 230MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Formaldehyde 4,011 41 229 1 229NSI 3 SIERRA-PACIFIC INDUST. 2421 Benzene 4,624 228 13 0 228SJU 50049 CHEVRON WARREN GP 1321 Acrolein 80 228 7 228NS 10006021 SMUD GEO I 4911 Ammonia 266,111 228 1 228NSI 1 SIERRA PACIFIC INDUSTRIE 2421 Chlorine 266 228 0 228SC 15980 LAMINATING CO OF AMERIC 7389 Methylene Chl 133,739 227 57 0 227MBU 51 SANTA CRUZ COGENERATIO8221 Formaldehyde 3,974 41 227 1 227BUT 1005 OROVILLE HOSPITAL 8062 HCl 11,900 226 0 226SC 59526 BFM ENERGY PRODUCTS C 3449 Perc 22,545 226 110 0 226SC 46543 BRENT AMERICA, INC 2842 Cr(VI) 1 226 1 226SJU 43 TTTI GUSTINE PUMP STATIO 4612 Cr(VI) 1 225 1 225SJU 62 TTTI PANOCHE PUMP STATI 4612 Cr(VI) 1 225 1 225SC 18695 US GYPSUM CO 3275 Cr(VI) 1 224 1 224SC 56229 AMREP INC 3713 Cr(VI) 1 224 1 224MBU 54 OGDEN POWER PACIFIC INC 4953 Cr(VI) 1 224 1 224LAS 15 H.L. POWER COMPANY 4931 Ammonia 261,906 224 1 224SC 24755 PACIFIC AIRMOTIVE CORP 4581 Cr(VI) 1 224 1 224SC 74696 TRW TECHNAR INC 3679 HCl 11,754 224 0 224SJU 50282 VICTORY OIL COMPANY 1311 H2S 13,052 223 5 223MBU 30 TEXACO, INC 1311 H2S 13,025 223 5 223SB 1086 RUSSELL RANCH - MAGNUS 1311 Formaldehyde 3,905 40 223 1 223SC 800012 ARCO PRODUCTS CO 2911 H2S 13,009 223 5 223LAK 290 CALPINE - CALISTOGA GEO 4911 Benzene 4,518 223 13 0 223SC 3566 BP CHEMICALS INC., SILMAR2821 Maleic Anhydr 908 222 222MBU 30 TEXACO, INC 1311 Cr(VI) 1 222 1 222LAS 16 MT. LASSEN POWER 4931 Nickel 65 29 222 0 222SJU 40028 CHAMPION PARTS WESTERN 3714 Cadmium 26 185 222 222MOJ 900002 IMC CHEMICALS, INC. 2819 Nickel 64 28 221 0 221NS 10006014 PG&E UNIT 17 4911 Manganese 257 220 220SC 61160 GE ENGINE SERVICES 5171 Formaldehyde 3,859 39 220 1 220SC 800223 TEXACO REF & MARKETING 2911 HCl 11,563 220 0 220BA 16 TOSCO RODEO REFINERY 2911 Benzene 4,460 220 13 0 220SC 800103 POWERINE OIL CO (EIS USE)2911 Acrolein 77 219 7 219SC 62843 SHELDAHL INC/ORANGE COU3679 4,4'-MeDianilin 280 219 2 219SC 20842 E J S LIGHTING CORP 3645 Perc 21,762 218 106 0 218MOJ 1200003 RIVERSIDE CEMENT COMPA 3241 Manganese 255 218 218SC 800257 HUGHES AIRCRAFT CO, ELE 3669 Cr(VI) 1 218 1 218SD 99 ROHR INDUSTRIES 3728 Nickel 63 28 217 0 217SC 779 TRW INC 8734 Fluorides&cm 16,490 217 1 217SJU 247 MOBIL EXPLORATION AND 1311 Cr(VI) 1 217 1 217SD 301 ROHR INC 3399 Cr(VI) 1 217 1 217SC 800144 UNION OIL CO OF CAL (NSR 2911 Benzene 4,383 216 13 0 216SJU 8 AD-ART INC. 3993 Lead Chromat 5 216 1 216SC 800183 PARAMOUNT PETR CORP (EI2911 Benzene 4,380 216 12 0 216SJU 10554 JS WEST MILLING COMPANY 2048 Cr(VI) 1 215 1 215SC 108457 CALMAT CO 9999 ChromiumTriO 2 215 72 215SC 1836 UNION OIL CO OF CALIFORN 1311 Formaldehyde 3,759 38 215 1 215SJU 206 WEST COAST OIL CO. 2911 Phosphorus 88 214 214SC 9729 PGP INDUSTRIES INC 3341 Copper 3,000 214 1 214

1996

SD 404 UNIV HOSPITAL/SCH OF 8062 Glutaraldhyd 100 214 214SC 800241 SHELL WESTERN E&P INC 1311 Acrolein 75 214 7 214SC 46837 SIMPSON PAPER CO @ COG 2621 Chloroform 23,725 214 14 3 214SJU 11125 VARCO PRUDEN BUILDINGS 3448 EGBE 24,859 213 0 213SC 12213 SIZE CONTROL PLATING CO 3471 ChromiumTriO 2 212 71 212SJU 493 THREE BRAND CATTLE CO 211 Cr(VI) 1 212 1 212SC 800144 UNION OIL CO OF CAL (NSR 2911 HCN 11,140 212 1 212SC 800067 HUGHES SPACE AND COMMU3679 Cr(VI) 1 212 1 212SLO 34 UNOCAL, NO DIV. PIPELINE 5171 Chlorine 247 212 0 212SC 800012 ARCO PRODUCTS CO 2911 Mercury 111 211 1 211BA 51 UNITED AIRLINES, MAINTEN 4581 Perc 20,999 211 103 0 211SJU 50217 SAN JOAQUIN REFINING CO.,2911 Nickel 61 27 211 0 211SD 6013 SD MARRIOTT HOTEL 7011 Formaldehyde 3,688 38 211 1 211SB 3914 APPLIED MAGNETICS CORP 3572 Cr(VI) 1 210 1 210NSI 3 SIERRA-PACIFIC INDUST. 2421 Formaldehyde 3,683 38 210 1 210NS 10006023 COLDWATER CREEK POWER4911 H2S 12,261 210 5 210SC 3173 BAXTER HEALTHCARE CORP3841 EtO 1,400 209 8 209SJU 10135 BEATRICE HUNT-WESSON F 2033 Chlorine 245 209 0 209SC 11773 EVEREST ELECTRONIC EQUI3479 Cr(VI) 1 209 1 209SC 47581 HYDREL, GTY IND DIV 3645 Cadmium 24 174 209 209NSI 1 SIERRA PACIFIC INDUSTRIE 2421 Nickel 61 27 209 0 209SJU 50069 DEXZEL, INC. 4911 Chlorine 244 209 0 209BA 187 PACIFIC STEEL CASTING CO 3325 Manganese 244 209 209SJU 50147 MCFARLAND ENERGY, INC. 1311 Formaldehyde 3,649 37 208 1 208MBU 138 SALINAS NEWSPAPERS INC. 2711 Diethanolamin 3,648 208 208SHA 18 SIERRA PACIFIC INDUSTRIE 2421 Chlorine 243 208 0 208SC 37336 COMMERCE REFUSE TO ENE4953 Mercury 109 207 1 207BA 778 SAN JOSE/SANTA CLARA WA4952 H2S 12,083 207 5 207SJU 50142 MARATHON OIL S COLES LE 1321 Formaldehyde 3,610 37 206 1 206SC 106325 HARBOR COGENERATION C 4932 Acrolein 72 205 6 205SJU 20283 POSDEF POWER COMPANY 4931 Fluorides&cm 15,600 205 1 205MOJ 11800001 MITSUBISHI CEMENT 3241 Beryllium 8 34 205 205YS 5008 INTERNATIONAL HOME FOOD2032 Chlorine 239 205 0 205SC 9668 DELUXE LABORATORIES INC7819 Perc 20,425 205 100 0 205SC 11574 CHEVRON USA INC. 1311 Benzene 4,150 205 12 0 205SJU 50171 MT POSO COGENERATION 4931 Acrolein 72 204 6 204SC 57311 HUCK INTERNATIONAL, INC 3452 Cr(VI) 1 204 1 204SB 17 GATO CORPORATION 1311 D[a,h]anthrac 100 204 204SC 3723 STERLING ELECTRIC INC 3621 Cadmium 24 170 203 203SC 800012 ARCO PRODUCTS CO 2911 Formaldehyde 3,562 36 203 1 203BA 2371 USS-POSCO INDUSTRIES 3312 HCl 10,671 203 0 203SC 88551 FOAMEX INTERNATIONAL, I 3086 T-2,6-diisocya 83 2 203 203SC 1615 GREAT WESTERN CARPET C3069 T-2,6-diisocya 83 2 203 203BA 197 REYNOLDS METALS COMPA 3411 EGEE 82,975 203 4 203SAC 3077 RYTINA INC 7216 Perc 20,190 203 99 0 203VEN 137 WESTERN FARM SERVICE 2875 Manganese 235 201 201SJU 1127 CHEVRON USA INC 1311 Naphthalene 3,481 201 66 201SC 14140 SHILEY 3842 EtO 1,345 201 8 201MOJ 3100066 SOUTHERN CALIFORNIA GA 4922 Formaldehyde 3,518 36 201 1 201MOJ 5400246 AEROCHEM INC 3728 HCl 10,554 201 0 201SJU 50303 CHEVRON U.S.A. PRODUCTI 1311 Acrolein 70 200 6 200SC 57329 KWIKSET CORP 3444 Chlorine 233 199 0 199SC 800153 US GOVT, NAVY DEPT LB SH 9711 Nickel 58 26 198 0 198SC 800116 SHELL OIL CO (EIS USE ONL 2911 Nickel 58 26 198 0 198NSI 1 SIERRA PACIFIC INDUSTRIE 2421 Benzene 4,010 198 11 0 198SC 45448 GAS RECOVERY SYSTEMS, I 1389 Cadmium 23 164 197 197

1996

SC 11192 HI-SHEAR CORP 3443 Cadmium 23 164 197 197IMP 52 ORMESA 1H 4911 Phosphorus 80 197 197VEN 22 HALACO ENGINEERING COM 3341 Nickel 57 25 197 0 197VEN 396 BERRY PETROLEUM COMPA 1311 DieselExhPM 385 196 13 196SD 73 SDG & E CO/ENCINA PLANT 4931 Manganese 228 196 196SD 4845 USN NAV STA 9711 Nickel 57 25 196 0 196SLO 44 MAGNESS PETROLEUM 1311 Formaldehyde 3,424 35 195 1 195PLA 43 LAUSMANN LUMBER & MOUL2431 Manganese 228 195 195SJU 50130 KERN OIL & REFINING CO. 2911 Cr(VI) 1 195 1 195IMP 50 A. W. HOCH 4911 Manganese 227 194 194SJU 508 DOLE ENTERPRISES 1311 Cr(VI) 1 194 1 194SC 7668 CLARK FOAM PROD. GORDO 3089 T-2,4-diisocya 79 1 193 193SJU 257 CHEVRON USA INC. 1311 Arsenic 34 190 193 3 193SC 48522 INTL RECTIFIER CORP. 3674 Sulfuric Acid 1,126 193 0 193SC 8582 SO CAL GAS CO 4923 Acrolein 67 192 6 192SHA 18 SIERRA PACIFIC INDUSTRIE 2421 Benzene 3,893 192 11 0 192SJU 50247 TANNEHILL OIL COMPANY 1311 Nickel 56 25 192 0 192LAK 50 CALPINE - WEST FORD FLAT 4911 H2S 11,200 192 5 192SC 6643 TECHNICOLOR INC 7819 Perc 19,074 191 93 0 191SC 1208 MICROSEMI CORP 3674 Perc 19,035 191 93 0 191TUO 15 SIERRA PACIFIC INDUSTRIE 2421 Cr(VI) 1 191 1 191SC 101380 U.S.ORDNANCE CO.,PRIMEX 3489 Cr(VI) 1 190 1 190SJU 20890 NEWARK SIERRA PAPERBOA2621 Cadmium 22 159 190 190SC 800189 DISNEYLAND RESORT 7996 Chlorine 221 190 0 190BA 15 EXXON CORPORATION 2911 Manganese 221 189 189SC 1615 GREAT WESTERN CARPET C3069 T-2,4-diisocya 77 1 189 189SC 88551 FOAMEX INTERNATIONAL, I 3086 T-2,4-diisocya 77 1 189 189SC 9670 UNIV CAL RIVERSIDE 8221 Acrylamide 86 189 21 189KER 20 CALAVERAS CEMENT CO 3241 Manganese 221 189 189SC 100844 MEDALLION CALIFORNIA PR 1311 Acrolein 66 189 6 189SJU 21150 SIMPSON PAPER COMPANY 2521 Formaldehyde 3,316 34 189 1 189SC 14800 INTERSTATE ENGINEERING, 3589 Nickel 55 24 189 0 189MOJ 25700917 CADIZ PUMP STATION AAPL 4612 Cr(VI) 1 189 1 189VEN 445 CAMARILLO SANITARY DIST 4952 Phosphorus 77 189 189MOJ 1200003 RIVERSIDE CEMENT COMPA 3241 Nickel 55 24 188 0 188MBU 68 MOBIL OIL, WEST COAST PI 4612 Benzene 3,806 188 11 0 188LAS 4 SIERRA PACIFIC IND 2421 Benzene 3,805 188 11 0 188SC 29110 ORANGE, COUNTYOF - SANI 4953 Cadmium 22 156 188 188SD 393 TRI-CITY MEDICAL CENTER 8062 Formaldehyde 3,263 33 186 1 186SAC 1001 BFI MEDICAL WASTE SYSTE 4953 2-4,7,8PeCDF 0 186 12 186TUO 1 SIERRA PACIFIC INDUSTRIE 2421 Cadmium 22 155 186 186SC 98492 CENTURY PLASTICS INC 2821 Cr(VI) 1 185 1 185SC 61160 GE ENGINE SERVICES 5171 Naphthalene 3,186 184 61 184VEN 33 LA CONCHITA OIL & GAS PL 1311 Acrolein 64 184 6 184SC 6815 AIR INDUSTRIES CORP 3429 Cr(VI) 1 184 1 184MOJ 19300771 FOUR CORNERS PIPE LINE - 4612 Cr(VI) 1 183 1 183NSI 3 SIERRA-PACIFIC INDUST. 2421 Manganese 214 183 183SJU 50160 MOBIL CHEMICAL CO. 3086 Cr(VI) 1 183 1 183BA 15 EXXON CORPORATION 2911 Benzene 3,705 183 11 0 183FR 9999 BEALE AIR FORCE BASE 9711 Arsenic 32 179 183 3 183SC 13097 MOBIL EXPLORATION & PR 1311 Benzene 3,702 183 11 0 183NSI 1 SIERRA PACIFIC INDUSTRIE 2421 Formaldehyde 3,196 33 182 1 182MBU 11 RMC LONESTAR INDUST CM 3241 HCl 9,579 182 0 182SB 47 HOLLY SUGAR - FACTORY 2063 Ammonia 212,429 182 1 182SC 58876 ARROWHEAD PRODUCTS 3728 Perc 18,086 181 88 0 181SC 800026 ULTRAMAR INC (NSR USE ON2911 CCl4 2,540 181 11 0 181

1996

SC 800144 UNION OIL CO OF CAL (NSR 2911 Cr(VI) 1 181 1 181LAK 160 HOMESTAKE MINING COMP 1041 Nickel 53 23 181 0 181VEN 1040 AIR NATIONAL GUARD 146 A 9711 DieselExhPM 354 181 12 181GLE 1000 JOHNS-MANVILLE 3296 DieselExhPM 354 180 12 180SC 47232 ARCO CQC KILN 2999 Cadmium 21 150 180 180SC 800232 HUNT-WESSON INC 2033 Chlorine 210 180 0 180VEN 144 LOS ROBLES HOSPITAL 8062 Glutaraldhyd 84 179 179SC 14195 THE HARTLEY CO, DIV FRA 3951 TCE 52,725 179 15 179SC 1596 THOMASON MECH CORP 7699 Cr(VI) 1 179 1 179SJU 20387 DIAMOND WALNUT GROWERS5145 Cr(VI) 1 179 1 179SC 47708 HELLMAN PROPERTIES 1311 Benzene 3,598 177 10 0 177TUO 12 PACIFIC-ULTRAPOWER CHIN2421 Nickel 52 23 177 0 177SHA 18 SIERRA PACIFIC INDUSTRIE 2421 Formaldehyde 3,100 32 177 1 177NS 10006026 SANTA ROSA GEOTHERMAL C4961 Arsenic 31 174 177 3 177SC 800144 UNION OIL CO OF CAL (NSR 2911 Manganese 203 174 174SJU 50140 M.H. WHITTIER, CORPORATI 1311 Glutaraldhyd 81 174 174SC 800089 MOBIL OIL CORP (EIS USE) 2911 Formaldehyde 3,048 31 174 1 174SC 71817 FOAMEX-A DIV OF KIHI 3086 T-2,4-diisocya 71 1 174 174MOJ 50001051 ACE COGENERATION 4911 Mercury 91 173 1 173SC 24957 GLENDALE CITY 4911 Manganese 202 173 173LAS 4 SIERRA PACIFIC IND 2421 Formaldehyde 3,030 31 173 1 173SAC 1117 INTEL CORPORATION 3674 DieselExhPM 339 173 12 173SC 7730 CARPENTER CO 3086 Methylene Chl 101,517 173 43 0 173NCU 37 LOUISIANA-PACIFIC CORP, 2611 H2S 10,071 172 4 172SAC 67 BLUE DIAMOND GROWERS 2099 Formaldehyde 3,016 31 172 1 172KER 21 NATIONAL CEMENT CO 3241 Epichlorohydri 3,001 117 171 0 171NS 10006009 PG&E UNIT 10 4911 Arsenic 30 168 171 3 171FR 19002 CUSTOM CHROME & BUMPE 3471 Nickel 50 22 171 0 171SJU 20653 J.R. SIMPLOT COMPANY 2873 Chlorine 200 171 0 171SJU 257 CHEVRON USA INC. 1311 Mercury 90 171 1 171SC 74696 TRW TECHNAR INC 3679 EGBE 19,992 171 0 171SJU 50047 CHEVRON USA 17Z NA GAS 1321 Acrolein 60 171 5 171NCU 60 THE PACIFIC LUMBER COM 2421 Benzene 3,468 171 10 0 171SC 22410 PALACE PLATING 3471 Perc 17,039 171 83 0 171SC 62665 DRILUBE COMPANY 3471 Cadmium 20 142 170 170SB 48 BATTLES OIL & GAS PLANT 1321 Formaldehyde 2,985 30 170 1 170SC 72635 MAIN STREET DAIRY 3556 Formaldehyde 2,977 30 170 1 170SJU 40034 CHEVRON USA PRODUCTIO 1311 Formaldehyde 2,976 30 170 1 170SC 44577 LONG BEACH CITY, SERRF 9199 Cr(VI) 1 170 1 170SJU 283 CHEMICAL WASTE MANAGEM4953 Manganese 198 169 169SD 5867 NELSON & SLOAN 1429 Cr(VI) 1 169 1 169SC 25012 AMADA MFG AMERICA, INC 3542 Perc 16,822 169 82 0 169SC 14478 COSMODYNE CORP 3494 Cr(VI) 1 168 1 168SC 15842 TELEDYNE CASTING SERVIC3369 Cr(VI) 1 168 1 168VEN 65 SCE-ORMOND BEACH GEN S4911 Formaldehyde 2,947 30 168 1 168SC 62897 NORTHROP GRUMMAN CORP3721 StrontiumChr 3 168 1 168SHA 13 ROSEBURG FOREST PRODUC2421 Nickel 49 22 168 0 168SD 5056 CONTINENTAL MARITIME 3731 Nickel 49 22 167 0 167SC 78257 MORTON INT'L INC.,INDUSTR5231 Cr(VI) 1 167 1 167SC 800290 CAL INST OF TECH 8221 Acrylamide 75 166 18 166SC 13962 CAL INST OF TECH UNIT NO. 8221 Acrylamide 75 166 18 166BA 2516 BONDED CLEANERS 7216 Perc 16,546 166 81 0 166SD 7067 PACIFIC SHIP REPAIR & FA 3731 Cr(VI) 1 166 1 166NCU 37 LOUISIANA-PACIFIC CORP, 2611 Acetaldehyde 8,714 40 166 166PLA 59 AMERICAN POLY-THERM CO. 2821 StrontiumChr 3 166 1 166VEN 445 CAMARILLO SANITARY DIST 4952 H2S 9,674 166 4 166

1996

SD 5258 IVAC CORP 3829 EtO 1,105 165 6 165SJU 50171 MT POSO COGENERATION 4931 Phosphorus 67 165 165SC 800035 CONTINENTAL AIRLINES INC 4512 Cr(VI) 1 165 1 165PLA 34 SIERRA PACIFIC INDUSTRIE 2421 Manganese 192 164 164BA 16 TOSCO RODEO REFINERY 2911 Mercury 86 164 1 164NCU 5 HAMBRO FOREST PROD 2493 Formaldehyde 2,877 29 164 1 164SC 14191 NIKLOR CHEMICAL COMPANY2879 Chlorine 192 164 0 164SC 24755 PACIFIC AIRMOTIVE CORP 4581 Sodium Hydrox 4,587 164 10 164SJU 1127 CHEVRON USA INC 1311 Acrolein 57 163 5 163SC 800144 UNION OIL CO OF CAL (NSR 2911 Naphthalene 2,819 163 54 163SC 800038 DOUGLAS PRODUCTS DIVIS 3721 Formaldehyde 2,852 29 163 1 163NS 10006015 PG&E UNIT 18 4911 Beryllium 7 27 162 162SJU 50122 J.G. BOSWELL 729 Cr(VI) 1 162 1 162BA 15 EXXON CORPORATION 2911 1,3-Butadiene 560 162 5 162SJU 20929 PACIFIC ENERGY 4911 Acrolein 57 161 5 161SJU 50256 TEXACO - BAKERSFIELD DIV 1311 H2S 9,411 161 4 161SC 16299 AMERIGAS PROPANE L.P. 1311 Acrolein 56 161 5 161NS 10006028 NORTHERN CALIFORNIA PO 4961 H2S 9,383 161 4 161SJU 494 BIDART BROS. FEEDLOT 211 Cr(VI) 1 161 1 161SC 800012 ARCO PRODUCTS CO 2911 Manganese 187 160 160SC 47708 HELLMAN PROPERTIES 1311 Formaldehyde 2,811 29 160 1 160SC 90546 SORIN BIOMEDICAL INC 3841 EtO 1,071 160 6 160SC 61962 LA CITY, HARBOR DEPT 4499 Lead Chromat 4 160 1 160SC 42676 AES PLACERITA INC 4911 Acrolein 56 160 5 160VEN 15 PROCTER & GAMBLE PAPER 2676 Naphthalene 2,762 160 53 160PLA 44 RIO-BRAVO 4911 Nickel 46 20 158 0 158SJU 40032 CHEVRON - COALINGA/KET 1311 Beryllium 6 26 157 157SC 800038 DOUGLAS PRODUCTS DIVIS 3721 StrontiumChr 2 157 1 157SJU 122 MALIBU BOATS WEST, INC. 3732 MeDiphenDiis 641 157 157LAK 160 HOMESTAKE MINING COMP 1041 HCN 8,221 156 0 156SJU 10427 GALLO GLASS COMPANY 3221 Cadmium 18 130 155 155SC 8584 1-DAY PAINT & BODY CENTE 7532 HexClCycHexa 83 155 14 155SC 17993 CAL-STYLE FURNITURE MFG 2514 Perc 15,459 155 76 0 155MOJ 13300611 NASA-JPL GOLDSTONE COM 9661 Chlorine 181 155 0 155SC 3317 OWENS-BROCKWAY GLASS 3221 Cadmium 18 129 155 155SC 16642 ANHEUSER-BUSCH INC., (L 2082 Methyl Bromid 4,520 155 0 155SC 37601 ANDERSON LITHOGRAPH C 2752 EGBE 18,021 154 0 154SC 18931 TAMCO 2759 Cadmium 18 129 154 154SJU 40105 FRESNO VALVES & CASTING,3369 Cr(VI) 1 154 1 154SAC 127 TELEDYNE MEC 3679 Cr(VI) 1 153 1 153SC 800116 SHELL OIL CO (EIS USE ONL 2911 Benzene 3,103 153 9 0 153KER 9 CAL PORTLAND CEMENT CO 3241 Cr(VI) 1 153 1 153SC 20000 BELL FOUNDRY CO 3321 Phosphorus 62 153 153SJU 20387 DIAMOND WALNUT GROWERS5145 Benzene 3,088 152 9 0 152NS 10006026 SANTA ROSA GEOTHERMAL C4961 Manganese 177 152 152SD 6794 T M I 3728 Perc 15,078 151 74 0 151SC 800030 CHEVRON U.S.A. INC 2911 Benzene 3,067 151 9 0 151SC 7730 CARPENTER CO 3086 1,1,1-TCA 882,496 151 0 151SAC 67 BLUE DIAMOND GROWERS 2099 Vinyl Chloride 1,138 151 7 0 151BA 15 EXXON CORPORATION 2911 Cadmium 18 126 151 151SD 138 FENTON H G MATERIAL CO 1429 Manganese 176 151 151SC 24046 ORCO BLOCK CO INC 3271 Sodium Hydrox 4,219 151 9 151VEN 65 SCE-ORMOND BEACH GEN S4911 Acrolein 53 151 5 151MBU 155 TELEDYNE RYAN AERONAUT2892 Cr(VI) 1 150 1 150VEN 1006 U.S. NAVY-NCBC 9711 Acrolein 53 150 5 150SC 17842 BANDAG INC 3011 Acrolein 53 150 5 150

1996

SJU 50234 SHELL WESTERN E&P INC. 1311 Formaldehyde 2,628 27 150 0 150BA 703 PACIFIC STEEL CASTING CO 3325 Manganese 175 150 150MOJ 8700587 USMC LOGISTICS BASE - Y 9711 Cr(VI) 1 149 1 149SAC 67 BLUE DIAMOND GROWERS 2099 Propylene Oxi 23,763 149 136 0 149SC 18508 AIR PROD & CHEM INC 2079 Formaldehyde 2,618 27 149 0 149SHA 2 CALAVERAS CEMENT COMP 3241 Mercury 78 149 1 149TUO 13 SONORA MINING CORP. 1041 Mercury 78 149 1 149SC 14759 RIVERSIDE CEMENT CO UNIT3255 Manganese 174 149 149SLO 44 MAGNESS PETROLEUM 1311 Acrolein 52 149 5 149SJU 40034 CHEVRON USA PRODUCTIO 1311 Beryllium 6 25 148 148BA 1605 CHEVRON REAL ESTATE M 4911 Formaldehyde 2,597 26 148 0 148SC 800189 DISNEYLAND RESORT 7996 Acrolein 52 148 5 148SB 31 PHILLIPS PETROLEUM 1311 Benzene 3,003 148 9 0 148SHA 2 CALAVERAS CEMENT COMP 3241 Acetaldehyde 7,780 36 148 148SD 404 UNIV HOSPITAL/SCH OF 8062 EtO 985 147 6 147SC 10018 PACIFIC COAST DRUM COM 5085 Lead Chromat 4 147 0 147NS 10006006 PG&E UNIT 7 4911 Beryllium 6 24 147 147SB 2658 UNION OIL COMPANY OF CA.1311 Benzene 2,974 147 8 0 147SC 8086 BAKER COMMODITIES INC 2077 Acrolein 51 146 5 146SC 21497 STAINLESS STEEL PRODUCT3444 Perc 14,576 146 71 0 146SC 800030 CHEVRON U.S.A. INC 2911 B[a]P 78 146 146SC 800184 GOLDEN WEST REF CO 2911 Nickel 43 19 146 0 146SC 12247 ALUMAX MILL PRODUCTS IN 3443 Nickel 43 19 146 0 146SD 2044 CHROMALLOY ADV TURBIN 7699 Cr(VI) 1 145 0 145SJU 20653 J.R. SIMPLOT COMPANY 2873 HF 11,850 145 1 145SJU 50027 BUTTONWILLOW GINNING C 724 Cr(VI) 1 145 0 145SC 18648 CROWN CITY PLATING CO 3471 Cr(VI) 1 144 0 144SJU 50142 MARATHON OIL S COLES LE 1321 Benzene 2,923 144 8 0 144BUT 36 FAR WEST RICE 723 Manganese 168 144 144NCU 8 SIERRA PACIFIC, IND. 2421 Nickel 42 19 144 0 144SJU 2149 CHEVRON USA PRODUCTIO 1311 H2S 8,393 144 3 144SC 55344 ARISTECH CHEM CORP 2821 HCl 7,550 144 0 144SC 10018 PACIFIC COAST DRUM COM 5085 Sodium Hydrox 4,025 144 9 144SJU 50234 SHELL WESTERN E&P INC. 1311 Manganese 167 143 143YS 36 PORT OF SACRAMENTO 4491 Methyl Bromid 4,179 143 0 143SC 800030 CHEVRON U.S.A. INC 2911 Mercury 75 143 1 143TUO 13 SONORA MINING CORP. 1041 Copper 1,996 142 0 142SC 800039 DOUGLAS PRODUCTS DIVIS 3721 Methylene Chl 83,527 142 36 0 142SC 5140 COMPOSITE STRUCTURES 3479 EDC 3,977 142 2 142SC 18763 SO CAL EDISON CO 4911 Formaldehyde 2,477 25 141 0 141MOJ 1500535 PG&E HINKLEY COMPRESSO4922 Benzene 2,864 141 8 0 141FR 9999 BEALE AIR FORCE BASE 9711 Beryllium 6 24 141 141SAC 1001 BFI MEDICAL WASTE SYSTE 4953 1-3,6-8HxCDF 0 141 9 141SJU 33 TEXACO REFINING & MARKE 2911 Chlorine 164 141 0 141SB 3170 PACIFIC OFFSHORE PIPELIN 1311 H2S 8,216 141 3 141SC 800224 SO CAL EDISON CO (EIS USE4911 Formaldehyde 2,464 25 141 0 141IMP 50 A. W. HOCH 4911 Bromine 1,394 140 140SC 57722 BALL GLASS CONTAINER C 3221 Cr(VI) 1 140 0 140SC 43436 TIMCO 3365 Formaldehyde 2,456 25 140 0 140SC 800038 DOUGLAS PRODUCTS DIVIS 3721 Cr(VI) 1 140 0 140SC 17749 ST CALIF DEPT CORRECTIO 8361 Acrolein 49 140 4 140SC 91259 JOHANSON DIELECTRICS IN 3679 Naphthalene 2,416 140 46 140SJU 50242 STOCKDALE OIL & GAS 1311 Nickel 41 18 140 0 140BUT 38 PACIFIC OROVILLE POWER, 4911 Benzene 2,830 140 8 0 140SC 800030 CHEVRON U.S.A. INC 2911 Chlorine 163 139 0 139BA 10 CHEVRON PRODUCTS COMP2911 1,3-Butadiene 481 139 4 139

1996

SC 13097 MOBIL EXPLORATION & PR 1311 Naphthalene 2,398 139 46 139SC 800026 ULTRAMAR INC (NSR USE ON2911 Naphthalene 2,398 139 46 139SC 62843 SHELDAHL INC/ORANGE COU3679 Acrylamide 63 139 15 139SC 800116 SHELL OIL CO (EIS USE ONL 2911 H2S 8,082 138 3 138SLO 43 CALRESOURCES 1311 H2S 8,079 138 3 138SC 25513 SIX FLAGS THEMES PARKS I 7996 Cadmium 16 115 138 138NS 10006025 UNOCAL GEOTHERMAL DIVI 4961 Arsenic 24 135 138 2 138SD 99 ROHR INDUSTRIES 3728 1,1,1-TCA 803,271 138 0 138KER 3 ASPHALT CONSTRUCTION 2951 Asbestos 1 137 137VEN 951 SANTA FE ENG OPER PARTN,1311 Acrolein 48 137 4 137SC 21887 KIMBERLY-CLARK WORLDWID2675 Acrolein 48 137 4 137SC 12583 COSMOTRONIC CO CORP 3672 Mercury 72 137 1 137SC 47232 ARCO CQC KILN 2999 Nickel 40 18 137 0 137SC 392 TAYLOR-DUNN MFG CO 3799 Cr(VI) 1 137 0 137VEN 244 ARCTURUS MANUFACTURIN 3463 Nickel 40 18 137 0 137SC 25016 CASTAIC CLAY MFG CO., INC3251 Fluorides&cm 10,358 136 1 136GBU 7 UNITED STATES TUNGSTEN 1061 Nickel 40 18 136 0 136SAC 3078 SAVE ON DRY CLEANERS 7216 Perc 13,581 136 66 0 136SJU 299 UNOCAL OIL & GAS DIVISION1311 Arsenic 24 134 136 2 136KER 20 CALAVERAS CEMENT CO 3241 Cadmium 16 113 136 136BA 207 QUEBECOR PRINTING SAN J 2721 Toluene 238,042 136 0 136NS 10006014 PG&E UNIT 17 4911 Beryllium 6 23 136 136SC 21908 SPS TECHNOLOGIES INC 3452 Cr(VI) 1 135 0 135SC 5448 ARRAL IND 3444 Cr(VI) 1 135 0 135SC 102684 HUCK INTERNATIONAL - DE 3452 Nickel 39 17 135 0 135SHA 43 WHEELABRATOR ENERGY S 4931 Manganese 158 135 135SC 68042 CORONA ENERGY PARTNERS4923 Glutaraldhyd 63 135 135KER 572 RAND MINING COMPANY 1041 Manganese 157 135 135MOJ 28300919 LAC MINERALS (COLOSSEUM1041 Manganese 157 134 134SJU 31 AMETEK-MICROFOAM 3081 Nickel 39 17 133 0 133SC 800116 SHELL OIL CO (EIS USE ONL 2911 Mercury 70 133 1 133SJU 2149 CHEVRON USA PRODUCTIO 1311 Naphthalene 2,295 133 44 133SHA 51 BURNEY FOREST PRODUCT 2421 Nickel 39 17 132 0 132NS 10006020 NCPA UNIT 4 4911 Benzene 2,681 132 8 0 132SC 14806 FERRO CORP. COMPOSITES 2295 4,4'-MeDianilin 169 132 1 132VEN 15 PROCTER & GAMBLE PAPER 2676 Acrolein 46 132 4 132YS 5 FARMERS' RICE COOPERATI 2044 Manganese 154 132 132SC 800039 DOUGLAS PRODUCTS DIVIS 3721 HF 10,766 132 1 132COL 57 ABA ENERGY CORPORATIO 1311 Chlorine 153 131 0 131NCU 96 FAIRHAVEN POWER COMPA 4911 Nickel 38 17 131 0 131SJU 20921 OWENS-BROCKWAY GLASS 3221 Arsenic 23 129 131 2 131SC 9053 CENTRAL PLANTS INC 4961 Arsenic 23 129 131 2 131SC 53748 GRIFFITH MICRO SCIENCE, I 2099 EtO 876 131 5 131SD 5867 NELSON & SLOAN 1429 Arsenic 23 129 131 2 131SC 18378 GRUBER SYS INC 3089 Urethane 265 131 131SC 16575 CENTRAL PLANTS INC 4961 Formaldehyde 2,284 23 130 0 130SC 23559 JOHNSON CONTROLS BATT 3691 Arsenic 23 128 130 2 130SC 10991 LA CITY, HYPERION TREATM 4952 Perc 12,980 130 64 0 130SC 28813 ALUMIN-ART PLATING, INC. 3471 Chlorine 152 130 0 130MOJ 11800001 MITSUBISHI CEMENT 3241 EDB 607 73 130 130SC 13668 SUNSET FIREPLACE FIXTUR 3444 Perc 12,930 130 63 0 130BA 13 TOSCO CORP, AVON REFIN 2911 Cr(VI) 1 130 0 130KER 20 CALAVERAS CEMENT CO 3241 Arsenic 23 127 129 2 129NSI 15 COLLINS PINE CO 2421 Cadmium 15 107 129 129SC 74696 TRW TECHNAR INC 3679 Cadmium 15 107 128 128SC 800259 BOEING NO AMERICAN, INC, 3764 Perc 12,801 128 63 0 128

1996

IMP 71 SALTON SEA POWER GEN/UN4911 Acrolein 45 128 4 128SC 6163 OHLINE 2431 EGBE 14,958 128 0 128SC 800118 SHELL OIL CO (EIS USE) 5171 Benzene 2,596 128 7 0 128IMP 51 J.M. LEATHERS 4911 Mercury 67 128 1 128SJU 50171 MT POSO COGENERATION 4931 Cr(VI) 1 128 0 128SJU 50290 WATERMAN FOUNDRY 3321 Cr(VI) 1 128 0 128SC 7499 ARROWHEAD BRASS PROD. 3366 Perc 12,716 128 62 0 128PLA 43 LAUSMANN LUMBER & MOUL2431 Cr(VI) 1 128 0 128SC 48567 WASTE KING 3639 Cr(VI) 1 128 0 128VEN 3 RINCON ISLAND LTD. PART 1311 DieselExhPM 250 127 9 127SJU 50243 STYROTEK INC. 2821 Chlorine 149 127 0 127SC 54627 HICKORY SPRINGS OF CAL I 3089 T-2,6-diisocya 52 1 127 127MBU 55 BASIC VEGETABLE PRODUC 2034 Acetaldehyde 6,683 31 127 127SC 800150 US GOVT, AF DEPT, MARCH 9711 HCl 6,678 127 0 127VEN 388 SENECA RESOURCES CORP.1311 Formaldehyde 2,224 23 127 0 127SC 58876 VESPER CORP 3728 Perc 12,655 127 62 0 127SJU 257 CHEVRON USA INC. 1311 Beryllium 5 21 127 127SJU 20777 LODI METAL TECH INC 2542 EGBE 14,804 127 0 127KER 572 RAND MINING COMPANY 1041 Cadmium 15 106 127 127SAC 3014 CAMELLIA ENTERPRISES 7216 Perc 12,599 126 62 0 126SC 3205 ANCO METAL IMPROVEMEN 3471 Perc 12,595 126 62 0 126SC 47859 CACO PACIFIC CORPORATI 3544 Glutaraldhyd 59 126 126SC 16660 MCDONNELL DOUGLAS AER 3761 Cr(VI) 0 126 0 126SC 21837 ALPHA/OWENS-CORNING, L.L2821 Maleic Anhydr 516 126 126SD 8360 CALLAWAY GOLF CO. 3949 1,1,1-TCA 736,745 126 0 126SD 91419 CALLAWAY GOLF 3511 1,1,1-TCA 736,745 126 0 126SHA 42 BURNEY MOUNTAIN POWER 4931 Benzene 2,558 126 7 0 126LAS 16 MT. LASSEN POWER 4931 Benzene 2,558 126 7 0 126SHA 44 DICALITE CORP. 1481 Formaldehyde 2,207 23 126 0 126SAC 27 PROCTER & GAMBLE 2841 Acrolein 44 126 4 126LAS 15 H.L. POWER COMPANY 4931 Phosphorus 51 126 126MOJ 1200003 RIVERSIDE CEMENT COMPA 3241 Cr(VI) 0 125 0 125VEN 970 TORCH OPERATING COMPA 1311 Formaldehyde 2,196 22 125 0 125GBU 3050309 CALIFORNIA ENERGY COMPA4961 Arsenic 22 123 125 2 125SD 6068 PACIFIC ENERGY 4911 Formaldehyde 2,182 22 125 0 125MOJ 50001051 ACE COGENERATION 4911 Arsenic 22 122 124 2 124SHA 2 CALAVERAS CEMENT COMP 3241 Cr(VI) 0 124 0 124SJU 50303 CHEVRON U.S.A. PRODUCTI 1311 Formaldehyde 2,175 22 124 0 124SJU 31 AMETEK-MICROFOAM 3081 Beryllium 5 21 124 124SC 8547 QUEMETCO INC 3341 Mercury 65 124 1 124SC 105598 SENIOR FLEXONICS INC/STA 3728 Perc 12,345 124 60 0 124BA 1634 NAPA STATE HOSPITAL 9431 Formaldehyde 2,168 22 124 0 124SC 47056 MYERS CONTAINER CORP, I 3412 Cr(VI) 0 124 0 124SJU 566 LIQUID WASTE MANAGEMENT4953 Naphthalene 2,136 123 41 123KER 28 U.S. BORAX 1474 Nickel 36 16 123 0 123SB 1012 AEROFLAIR INC 3479 Cr(VI) 0 123 0 123SC 6459 ALLIEDSIGNAL AEROSPACE 3724 Cr(VI) 0 123 0 123LAK 240 CALPINE UNIT 16: POWER/S 4911 H2S 7,204 123 3 123SJU 20387 DIAMOND WALNUT GROWERS5145 Cadmium 14 103 123 123SC 800216 INT'L LIGHT METALS CORPO 3365 Chlorine 144 123 0 123SC 20766 DITTY DRUM 3412 Cr(VI) 0 123 0 123BA 568 SAN FRANCISCO SOUTH EAS4952 H2S 7,183 123 3 123SC 11142 KEYSOR-CENTURY CORP 2821 Vinyl Chloride 925 123 6 0 123KER 21 NATIONAL CEMENT CO 3241 Benzene 2,487 123 7 0 123SC 12441 SHERATON UNIVERSAL HOT 7011 Chlorine 143 122 0 122SC 800087 MENASCO MFG CO (EIS USE 3728 Cr(VI) 0 122 0 122

1996

SD 167 SOLAR TURBINES INC 3511 Copper 1,715 122 0 122NS 10006016 PG&E UNIT 20 4911 Beryllium 5 20 122 122AV 14194 LA CO., SANITATION DIST #1 4959 H2S 7,121 122 3 122SC 5308 AERO ENGINES INC 3724 TetraClEthane 1,232 121 121SC 20302 RESINART CORP 3089 Naphthalene 2,100 121 40 121IMP 47 NEW CHARLESTON POWER L4911 Manganese 141 121 121MOJ 9600500 BARSTOW, CITY OF - WWT 4952 Chlorine 141 121 0 121SJU 50177 NAVAL PETROLEUM RESERV1311 Chlorine 141 121 0 121SHA 43 WHEELABRATOR ENERGY S 4931 Formaldehyde 2,115 22 121 0 121SC 800181 CALIFORNIA PORTLAND CE 3273 Cr(VI) 0 121 0 121SD 7330 WATKINS MANUFACTURING 3088 Methylene Chl 70,871 120 30 0 120SC 3949 MICRODOT INC, KAYNAR M 3452 Cr(VI) 0 120 0 120SC 53610 LA CO., METROPOLITAN TR 4111 Naphthalene 2,077 120 40 120SC 800223 TEXACO REF & MARKETING 2911 Ammonia 140,197 120 1 120SD 63 CALMAT CO 1429 Manganese 140 120 120NS 10006026 SANTA ROSA GEOTHERMAL C4961 Nickel 35 15 120 0 120NSI 3 SIERRA-PACIFIC INDUST. 2421 Cadmium 14 100 120 120SC 5638 L.A.PARKERIZING COMPANY,3479 Cadmium 14 100 120 120MEN 100119 MASONITE HARDBRD DIV 2499 Cadmium 14 100 120 120SC 800171 MOBIL OIL CO (EIS USE) 5171 Chlorine 140 120 0 120BA 207 QUEBECOR PRINTING SAN J 2721 Cr(VI) 0 120 0 120SJU 40128 J.G. BOSWELL OIL MILL 723 Cadmium 14 100 119 119MOJ 11800001 MITSUBISHI CEMENT 3241 Nickel 35 15 119 0 119KER 47 AIR FORCE FLIGHT TRAININ 9711 Phosphorus 49 119 119NS 10006014 PG&E UNIT 17 4911 Arsenic 21 117 119 2 119SD 674 LANGLEY CORPORATION 3499 Perc 11,818 119 58 0 119NS 10006028 NORTHERN CALIFORNIA PO 4961 Manganese 138 118 118SC 1992 PRUDENTIAL OVERALL SUP 7218 Perc 11,798 118 58 0 118MOJ 13300611 NASA-JPL GOLDSTONE COM 9661 Cr(VI) 0 118 0 118SC 42676 AES PLACERITA INC 4911 Ammonia 138,016 118 1 118SC 22092 WESTERN TUBE & CONDUIT 3317 EGBE 13,784 118 0 118NS 10006004 PG&E UNIT 5 4911 Beryllium 5 20 117 117NCU 37 LOUISIANA-PACIFIC CORP, 2611 Benzene 2,378 117 7 0 117SJU 40034 CHEVRON USA PRODUCTIO 1311 Naphthalene 2,028 117 39 117SC 11790 CONSOLIDATED FILM INDUS 7384 Perc 11,680 117 57 0 117AV 800262 LOCKHEED ADVANCED DEV 5088 4,4'-MeDianilin 150 117 1 117SC 45757 WHITING ROLL-UP DOOR M 3714 TCE 34,377 117 10 117SJU 50140 M.H. WHITTIER, CORPORATI 1311 Acrolein 41 117 4 117SAC 141 DRY CLEAN TODAY 7211 Perc 11,636 117 57 0 117SD 6763 CHILDREN'S HOSPITAL 8069 EtO 778 116 4 116IMP 18 VAL-ROCK INC 2951 Cr(VI) 0 116 0 116VEN 83 CLAIROL INC. 2844 Chlorine 136 116 0 116MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Cr(VI) 0 116 0 116SD 4821 NAVAL AVIATION DEPORT,C 9711 Cr(VI) 0 116 0 116SJU 50160 MOBIL CHEMICAL CO. 3086 Naphthalene 2,002 116 38 116SD 221 USMC BASE 9711 Arsenic 20 114 116 2 116SC 42775 WEST NEWPORT OIL CO 1311 Formaldehyde 2,025 21 116 0 116BUT 9 KOPPERS COMPANY, INC. 2491 Formaldehyde 2,023 21 115 0 115SC 39555 CRAGAR INDUSTRIES 3471 Nickel 34 15 115 0 115NCU 37 LOUISIANA-PACIFIC CORP, 2611 Cadmium 13 96 115 115BA 51 UNITED AIRLINES, MAINTEN 4581 Benzyl Chlorid 1,384 115 20 0 115SB 3203 JOVALAN BARGE 1311 DieselExhPM 226 115 8 115VEN 65 SCE-ORMOND BEACH GEN S4911 1,3-Butadiene 398 115 3 115SC 24755 PACIFIC AIRMOTIVE CORP 4581 Nickel 34 15 115 0 115VEN 65 SCE-ORMOND BEACH GEN S4911 Manganese 134 115 115SC 43826 SERMATECH INTERNATIONAL3479 Cr(VI) 0 115 0 115

1996

SC 74696 TRW TECHNAR INC 3679 Copper 1,608 115 0 115SJU 50140 M.H. WHITTIER, CORPORATI 1311 Cadmium 13 96 115 115SC 800089 MOBIL OIL CORP (EIS USE) 2911 Cr(VI) 0 113 0 113YS 6 PIRMI 2044 Manganese 132 113 113SHA 2 CALAVERAS CEMENT COMP 3241 Manganese 132 113 113SD 4824 USN AIR STATION-MIRAMAR 9711 Arsenic 20 111 113 2 113IMP 49 J.J. ELMORE 4911 Benzene 2,298 113 7 0 113SJU 1130 TEXACO EXPLOR & PRODUCT1311 Acrolein 40 113 4 113SC 6384 LA CO., RANCHO LOS AMIGO8069 Chlorine 132 113 0 113SC 23378 LOCKHART IND INC 3829 Perc 11,248 113 55 0 113NCU 60 THE PACIFIC LUMBER COM 2421 Formaldehyde 1,974 20 113 0 113SD 77 SIM J HARRIS CO 1429 Manganese 131 113 113BA 698 G-P GYPSUM CORPORATION3275 HCl 5,908 112 0 112SC 800116 SHELL OIL CO (EIS USE ONL 2911 Cr(VI) 0 112 0 112NSI 15 COLLINS PINE CO 2421 Chlorine 131 112 0 112SHA 40 WHEELABRATOR HUDSON E 2421 Manganese 131 112 112SC 43759 LA CO., METROPOLITAN TR 4100 Cadmium 13 93 111 111BUT 38 PACIFIC OROVILLE POWER, 4911 Formaldehyde 1,950 20 111 0 111SC 99173 TITAN WHEEL INTL INC, AU 3714 EGBE 12,993 111 0 111SJU 40034 CHEVRON USA PRODUCTIO 1311 DieselExhPM 217 111 7 111SC 46268 CALIFORNIA STEEL INDUSTR3312 ChromiumTriO 1 111 37 111NCU 21 SIMPSON PAPER COMPANY 2611 Manganese 129 111 111SC 17285 PETROLANE-LOMITA GASOLI4925 Formaldehyde 1,940 20 111 0 111SJU 40017 CALIF STATE UNIVERSITY, 8221 Chlorine 129 110 0 110SC 5723 AEROCHEM INC 3471 Sodium Hydrox 3,095 110 7 110COL 114 PETSEC(AA PRODUCTION SE1311 Chlorine 129 110 0 110VEN 129 SPARTECH POLYCOM 3087 Acrylonitrile 224 110 8 110SD 7263 ALLIED/OTAY LANDFILL 4953 Vinyl Chloride 830 110 5 0 110SC 7855 KNOTT'S BERRY FARM 7996 Acrolein 39 110 3 110SC 43759 LA CO., METROPOLITAN TR 4100 Sodium Hydrox 3,077 110 7 110BUT 21 COMET RICE, INC 723 Manganese 128 110 110SC 3873 LOCKHEED ADVANCED DEV 3728 Cadmium 13 91 110 110NSI 3 SIERRA-PACIFIC INDUST. 2421 Nickel 32 14 110 0 110SJU 15 WESTERN COTTON SERVICE2074 Beryllium 4 18 110 110YS 5136 WALKER & SONS CUSTOM 3471 Cr(VI) 0 110 0 110SAC 1028 THE PALM IRON & BRIDGE 3441 Manganese 128 109 109SC 800012 ARCO PRODUCTS CO 2911 1,3-Butadiene 378 109 3 109SC 800074 LA CITY, DWP HAYNES GEN 4911 Formaldehyde 1,913 20 109 0 109IMP 44 VULCAN GEOTHERMAL 4911 Chlorobenzilat 2,070 109 109SC 13048 ATHEARN INC 3944 HexClCycHexa 58 109 10 109SJU 50002 ARCO OIL AND GAS COMPA 1311 Phosphorus 45 109 109SD 249 GENERAL DYNAMICS/CONVAI3724 Methylene Chl 64,118 109 27 0 109AV 800262 LOCKHEED ADVANCED DEV 5088 Cr(VI) 0 108 0 108SC 8524 GRIFFIN PRINTING & LITHO 2759 Cr(VI) 0 108 0 108YS 256 TREASURE CHEST ADVERTIS2752 Glutaraldhyd 50 108 108SD 99 ROHR INDUSTRIES 3728 HCl 5,663 108 0 108SC 6778 INDUSTRIAL ELECTRONIC E 3692 TolueneDiisoc 44 1 108 108SC 800030 CHEVRON U.S.A. INC 2911 Ammonia 125,539 107 1 107PLA 44 RIO-BRAVO 4911 Naphthalene 1,859 107 35 107KER 47 AIR FORCE FLIGHT TRAININ 9711 Formaldehyde 1,883 19 107 0 107SC 49805 LA CITY, BUREAU OF SANIT 4953 HCl 5,639 107 0 107MOJ 35601021 CASTLE MOUNTAIN MINE 1041 Copper 1,502 107 0 107NS 10006021 SMUD GEO I 4911 Arsenic 19 105 107 2 107SC 8206 ENTERPRISE SALES CO. 2899 Sodium Hydrox 3,000 107 6 107SJU 50113 HIGH SIERRA LIMITED 4911 Formaldehyde 1,870 19 107 0 107SJU 41 ANDERSON CLAYTON CORP/O2074 Beryllium 4 18 107 107

1996

MOJ 8600591 USMC A/G COMBAT CENTER 9711 Phosphorus 44 107 107SC 25233 GENERAL DYNAMICS 3761 Cr(VI) 0 107 0 107BA 31 DOW CHEMICAL COMPANY 2812 1,3-Butadiene 369 107 3 107SC 65974 ARCO WESTERN ENERGY,UN1311 Acrolein 37 106 3 106SC 5960 HKM OF CALIFORNIA KRASN 3714 Acetaldehyde 5,591 26 106 106SC 7120 METAL CONTAINER CORP OF3411 Chlorine 124 106 0 106SD 2044 CHROMALLOY ADV TURBIN 7699 Nickel 31 14 106 0 106SB 3325 FULLERTON LEASE - SABA 1311 Formaldehyde 1,860 19 106 0 106MOJ 8400589 US ARMY NATIONAL TRAININ9711 Nickel 31 14 106 0 106IMP 54 AMERICAN GIRL MINE 1041 Nickel 31 14 106 0 106SLO 24 CALIF POLY STATE UNIV 8221 Cr(VI) 0 106 0 106SJU 50170 MONARCH COGENERATION 14931 Ammonia 123,867 106 1 106SC 1464 COACHELLA VALLEY WATER 4941 1,4-Dioxane 8,082 106 0 0 106SC 43880 LA CO., METROPOLITAN TR 4213 Naphthalene 1,829 106 35 106SC 43436 TIMCO 3365 H2S 6,170 106 3 106SC 800113 ROHR,INC 3728 Chlorine 123 105 0 105MOJ 1500039 PG&E TOPOCK COMPRESSO4922 Benzene 2,132 105 6 0 105SJU 2133 ENVIROPUR WEST 2992 Acrolein 37 105 3 105MOJ 27000935 AFG INDUSTRIES INC 3211 Cr(VI) 0 105 0 105SC 800012 ARCO PRODUCTS CO 2911 B[a]P 56 105 105SJU 40115 GWF POWER SYSTEMS COMP4911 HCl 5,508 105 0 105SC 800167 NORTHROP GRUMMAN COR 3721 EGBE 12,238 105 0 105SC 8570 EMBEE PLATING CO 3471 Chlorine 122 105 0 105SD 358 SHARP MEMORIAL HOSPITA 8062 EtO 699 105 4 105SJU 50192 PETROLITE CORPORATION 2899 Naphthalene 1,808 104 34 104SC 21908 SPS TECHNOLOGIES INC 3452 Cadmium 12 87 104 104VEN 146 COOK COMPOSITES & POLY 2821 Methylene Chl 61,419 104 26 0 104SJU 33 RANCHERS COTTON OIL 2074 Cadmium 12 87 104 104SLO 74 PG&E DIABLO CANYON PP 4911 Chlorine 121 104 0 104SC 800263 U.S. GOVT, DEPT OF NAVY 9711 Acrolein 36 104 3 104KER 47 AIR FORCE FLIGHT TRAININ 9711 Cr(VI) 0 104 0 104SJU 50130 KERN OIL & REFINING CO. 2911 Mercury 54 104 1 104MOJ 1200003 RIVERSIDE CEMENT COMPA 3241 HCl 5,439 103 0 103MOJ 6900004 COOLWATER GENERATING S4911 Chlorine 121 103 0 103SC 861 STAR-KIST FOODS INC (CAN 2091 Formaldehyde 1,808 18 103 0 103NSI 14 HANSEN BROS. ENTERPRIS 1442 Cr(VI) 0 103 0 103SJU 179 TRIANGLE PACIFIC CORP. 2434 Formaldehyde 1,802 18 103 0 103SC 48273 GQI CLASSIC BRASS INC. 3471 Nickel 30 13 103 0 103SC 9729 PGP INDUSTRIES INC 3341 Chlorine 120 103 0 103SJU 40152 MADERA GLASS COMPANY 3221 Arsenic 18 101 103 2 103VEN 4 VINTAGE PETROLEUM INC. 1311 Formaldehyde 1,798 18 103 0 103ED 7 SIERRA PACIFIC INDUSTRIE 2421 Benzene 2,078 102 6 0 102SC 6150 ALLIED SIGNAL AEROSPACE 3365 HCl 5,379 102 0 102PLA 34 SIERRA PACIFIC INDUSTRIE 2421 Cr(VI) 0 102 0 102SC 18990 LIFE PAINT CO 2851 Cr(VI) 0 102 0 102LAK 160 HOMESTAKE MINING COMP 1041 Cadmium 12 85 102 102SD 88176 SD CTY/OTAY ANNEX LANDF 4953 Vinyl Chloride 768 102 5 0 102NS 10006025 UNOCAL GEOTHERMAL DIVI 4961 Bromine 1,010 102 102MOJ 100005 SOUTHDOWN - VICTORVILLE3241 Manganese 119 102 102MBU 68 MOBIL OIL, WEST COAST PI 4612 H2S 5,937 102 2 102SJU 50997 MOBIL 1311 Acrolein 36 101 3 101SD 7067 PACIFIC SHIP REPAIR & FA 3731 Epichlorohydri 1,777 69 101 0 101SC 800030 CHEVRON U.S.A. INC 2911 Acrolein 35 101 3 101SC 43436 TIMCO 3365 Nickel 30 13 101 0 101SAC 3003 A-SILK DRY CLEANERS 7216 Perc 10,095 101 49 0 101BA 16 TOSCO RODEO REFINERY 2911 Ammonia 118,166 101 1 101

1996

SHA 42 BURNEY MOUNTAIN POWER 4931 Formaldehyde 1,771 18 101 0 101PLA 44 RIO-BRAVO 4911 Cadmium 12 84 101 101BA 3285 CAMARO CLEANERS 7216 Perc 10,063 101 49 0 101LAS 16 MT. LASSEN POWER 4931 Formaldehyde 1,764 18 101 0 101NS 10006010 PG&E UNIT 11 4911 Manganese 117 101 101KER 47 AIR FORCE FLIGHT TRAININ 9711 HCl 5,274 100 0 100SC 13828 CHEVRON USA INC. 1311 H2S 5,856 100 2 100BUT 41 RANCHO ESQUON, INC RICE 723 Manganese 117 100 100SJU 520 WESTERN COTTON SERVICE 724 Cr(VI) 0 100 0 100SJU 1246 BERRY PETROLEUM COMPA 1311 Cr(VI) 0 100 0 100SC 50621 CB&I CONSTRUCTORS, INC. 3471 Manganese 117 100 100SC 53744 LA CO., METROPOLITAN TR 4213 Naphthalene 1,725 100 33 100SD 3680 SD CITY WSTE WATER TRTM4952 H2S 5,820 100 2 100VEN 990 CALRESOURCES LLC 1311 Acrolein 35 100 3 100

Here are the top potency-weighted facilities for 2001, 2004, 2005, and 2006.

CO AB DIS FACID FNAME SUM(CANCER_ Year select co, ab, dis, facid, fname, sum(cancer_score) from tonesumscore200555 MC TUO 13 SONORA MINING CORP. 223,254 2001 where cancer_score>015 SJV SJU 625 CALMAT CO. 177,336 2001 group by co, ab, dis, facid, fname19 SC SC 800074 LA CITY, DWP HAYNES 21,446 2001 order by sum(cancer_score) desc19 SC SC 15549 A J INDUSTRIES INC, S 19,891 200115 MD KER 47 EDWARDS AIR FORCE 15,329 200119 SC SC 800362 TOSCO REFINING COM 15,272 200133 SC SC 69199 BWD CORPORATION 14,040 200119 SC SC 46903 CHATSWORTH PLATING 13,094 200119 SC SC 3875 LA CITY, DWP 12,842 200119 SC SC 6012 MCDONNELL DOUGLAS 12,619 200151 SV FR 19 SANTA FE MINERALS IN 12,478 200150 SJV SJU 10316 DEL MONTE USA PLANT 11,771 200126 GBV GBU 5 DESERT AGGREGATES 10,752 200119 SC SC 9729 PGP INDUSTRIES INC 10,413 200119 SC SC 800089 MOBIL OIL CORP 10,103 200119 SC SC 23589 INTERNATIONAL EXTRU 10,018 200133 SC SC 800150 US GOVT., AF DEPT, M 9,499 200136 SC SC 122300 BASF CORPORATION 9,494 200123 NC MEN 100119 MASONITE HARDBRD DI 9,389 200115 MD KER 21 NATIONAL CEMENT CO 9,267 200115 SJV SJU 50234 SHELL WESTERN E&P I 9,229 200119 SC SC 40328 COOPER DRUM COMPA 9,105 200115 SJV SJU 211 CHEMEX INC 7,895 200149 NC NS 10006021 SONOMA POWER PLAN 7,598 200130 SC SC 2613 US GOVT, NAVY DEPT, 7,565 200115 SJV SJU 625 CALMAT CO. 177,336 200436 SC SC 14495 VISTA METALS CORPO 94,402 200419 SC SC 4477 SO CAL EDISON CO 43,844 200419 SC SC 11192 HI-SHEAR CORPORATI 36,470 200436 MD MOJ 1200003 TXI RIVERSIDE CEMEN 22,001 200450 SJV SJU 10316 DEL MONTE USA PLANT 11,771 200419 SC SC 12129 BEVERLY HOSPITAL 11,525 200415 SJV SJU 50234 SHELL WESTERN E&P I 9,229 200449 NC NS 10006021 SONOMA POWER PLAN 7,598 200415 SJV SJU 50098 GOLDEN STATE METALS, 7,335 200419 SC SC 98155 ROTORCRAFT SUPPORT 7,166 200415 MD KER 9 CALIFORNIA PORTLAND 6,905 200436 SC SC 43201 SNOW SUMMIT INC 6,414 200449 NC NS 10006028 NORTHERN CALIFORNI 6,320 200456 SCC VEN 1266 MASON CONSTRUCT & 6,222 200419 MD AV 10231816 NORTHROP GRUMMAN 6,067 200419 SC SC 20604 RALPHS GROCERY CO 5,976 200444 NCC MBU 1482 UCSC 5,859 200415 MD KER 572 RAND MINING COMPAN 5,484 200434 SV SAC 160 CONSOLIDATED FABRI 4,967 200415 SJV SJU 257 CHEVRON USA INC. 4,700 200410 SJV SJU 40032 CHEVRON - COALINGA/ 4,645 200419 SC SC 131003 BP WEST COAST PROD. 4,626 2004

19 SC SC 48323 SIGMA PLATING CO INC 4,617 200419 MD AV 115902005 FRESH AIR ENVIRONME 4,607 200415 SJV SJU 625 CALMAT CO. 177,336 200519 SC SC 11192 HI-SHEAR CORPORATI 92,311 200550 SJV SJU 10316 DEL MONTE USA PLANT 11,771 200519 SC SC 12129 BEVERLY HOSPITAL 11,023 200526 GBV GBU 5 DESERT AGGREGATES 10,690 200537 SD SD 4824 FAA MIRAMAR 9,922 200515 SJV SJU 50234 SHELL WESTERN E&P I 9,229 200536 MD MOJ 8400589 US ARMY NATIONAL TRA 8,097 200515 SJV SJU 50098 GOLDEN STATE METALS, 7,335 200519 SC SC 90847 KLUNE INDUSTRIES INC 6,913 200515 MD KER 9 CALIFORNIA PORTLAND 6,905 200549 NC NS 10006028 NORTHERN CALIFORNI 6,320 200556 SCC VEN 1266 MASON CONSTRUCT & 6,222 200544 NCC MBU 1482 UCSC 5,859 200515 MD KER 572 RAND MINING COMPAN 5,484 200519 SC SC 141878 SWIFT-COR AEROSPACE 5,457 200534 SV SAC 160 CONSOLIDATED FABRI 4,967 200515 SJV SJU 257 CHEVRON USA INC. 4,700 200510 SJV SJU 40032 CHEVRON - COALINGA/ 4,645 200519 MD AV 115902005 FRESH AIR ENVIRONME 4,607 200549 NC NS 10006018 NCPA UNIT 2 4,459 200536 MD MOJ 35601021 CASTLE MOUNTAIN MIN 4,010 200539 SJV SJU 21419 THE WINE GROUP INC 3,742 200519 MD AV 122802129 LANCASTER LANDFILL 3,478 200519 SC SC 140811 DUCOMMUN AEROSTRU 3,261 200515 SJV SJU 625 CALMAT CO. 177,336 200619 SC SC 11192 HI-SHEAR CORPORATI 92,311 200650 SJV SJU 10316 DEL MONTE USA PLANT 11,771 200619 SC SC 12129 BEVERLY HOSPITAL 11,023 200626 GBV GBU 5 DESERT AGGREGATES 10,690 200637 SD SD 4824 FAA MIRAMAR 9,922 200615 SJV SJU 50234 SHELL WESTERN E&P I 9,229 200636 MD MOJ 8400589 US ARMY NATIONAL TRA 8,097 200615 SJV SJU 50098 GOLDEN STATE METALS, 7,335 200619 SC SC 90847 KLUNE INDUSTRIES INC 6,913 200615 MD KER 9 CALIFORNIA PORTLAND 6,905 200649 NC NS 10006028 NORTHERN CALIFORNI 6,320 200656 SCC VEN 1266 MANSON CONSTRUCT & 6,222 200644 NCC MBU 1482 UCSC 5,859 200615 MD KER 572 RAND MINING COMPAN 5,484 200619 SC SC 141878 SWIFT-COR AEROSPACE 5,457 200634 SV SAC 160 CONSOLIDATED FABRI 4,967 200615 SJV SJU 257 CHEVRON USA INC. 4,700 200610 SJV SJU 40032 CHEVRON - COALINGA/ 4,645 200619 MD AV 115902005 FRESH AIR ENVIRONME 4,607 200649 NC NS 10006018 NCPA UNIT 2 4,459 200636 MD MOJ 35601021 CASTLE MOUNTAIN MIN 4,010 200639 SJV SJU 21419 THE WINE GROUP INC 3,742 200619 MD AV 122802129 LANCASTER LANDFILL 3,478 2006

19 SC SC 140811 DUCOMMUN AEROSTRU 3,261 2006

select co, ab, dis, facid, fname, sum(cancer_score) from tonesumscore2005where cancer_score>0group by co, ab, dis, facid, fnameorder by sum(cancer_score) desc

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