Williams AR # 1617 Page 1 of 87€¦ · Williams AR # 1617 Page 6 of 87 months of operation with the modified system, AMEC will evaluate the results. By the end of 2013 AMEC plans

Williams AR # 1617 Page 1 of 87


DEPARTMENT OF THE AIR FORCE

AIR FORCE CIVIL ENGINEER CENTER

MEMORANDUM FOR SEE DISTRIBUTION

FROM: AFCEC/CIBW706 Brooks RoadRome NY 13441

JUL 18 2013

SUBJECT: Restoration Advisory Board Meeting Minutes, 19 February 2013

1. Attached please find the final minutes from the 19 February 2013 Williams RestorationAdvisory Board (RAB) meeting held at the Arizona State University Polytechnic Campus asapproved by the RAB members at the 14 May 2013 meeting.

2. If you have any questions or comments, please contact Ms. Linda Geissinger at(916) 643-6420 x109.

Attachment:Final RAB Meeting Minutes, 19 February 2013

Lo'(t LL--t

CATHERINE RRARD, PEBRAC Environmental Coordinator


DISTRIBUTION LISTFinal 19 February 2013 Williams RAB Meeting Minutes

Electronic Copy

Col. Len Fuchs, RAB Community Co-ChairCatherine Jerrard, RAB Co-Chair, AFCECDale Anderson, RAB, Gila River IndianCommunityScott Bouchie, RAB, City of MesaDon Atkinson, RAB, ADEQMatt Fesko, RAB, ASU graduate studentLonnie Frost, RAB, Gilbert Public WorksCarolyn d'Almeida, RAB, USEPALisa Marie Gerdel, RAB, Gilbert residentJames Holt, RAB, Queen Creek residentTom Zuppan, RAB, Gilbert residentAlan Ruffalo, RAB, Power Ranch residentDennis Orr, RAB, Gateway AirportPat Tennant, RAB, ASUTeresa Harris, RAB, Gilbert residentDoug Ashline, CitizenDominic Hernandez, CitizenDana Koziel, CitizenDon Lyon, CitizenBen Shunk, Gilbert residentLeo Pessin, Gilbert residentBeverly Selvage, Mesa residentThom Schuett, Queen Creek residentDon Smallbeck, AMECEverett Wessner, AMECJulie Hamilton, AMECEmily Corkery, AMECChris Courtney, AMECLinda Geissinger, AFCEC/CIBWBrian Sytsma, Napkin CommunicationsScott Johnston, Napkin CommunicationsMary Hall, AFCEC Public Affairs contractorGeoff Watkin, Cherokee Nation Gov. ServicesCalvin Cox, Cherokee Nation Gov. ServicesPatrick Banger, Town of Gilbert - City ManagerSharalyn Barnby, ASUAngela Creedon, ASULatonja West, ASUSteve Nielson, ASU

Joshua Hoyt, ASUSteve Hunter, ASURichard Malloy, ASUTheodore Betkie, ASU studentThomas Butler, USEPAEva Davis, USEPACollin DeWitt, Gilbert Fire Dept.Lawrence Dough, Able EngineeringVictor Gamez -Grij alva, CH2MHILLColleen Gilbert, Congressional Military AffairsMark Holmes, City of MesaJim Husbands, Booz Allen HamiltonAngie Kannada, Tierra DynamicsDan Kelley, Terra DynamicsAdam Mahamed, ADEQWayne Miller, ADEQDelfina Olivares, ADEQTravis Barnum, ADEQFelicia Calderon, ADEQLaura McNamara, HGLKimberly Vaughn, HGLRoger A. Fitzpatrick, HGLJohn Pekala, Environmental CorporationKathy Rall, Town of GilbertMartin Sepulveda, Sepulveda GroupBrian Sexton, Gateway AirportBrian Snowden, Arizona Green MagazineGlenn Stark, Gila River Indian CommunityGlen Stephens, Ch. 11 Mesa public accessArt Thomason, Arizona RepublicPhil Whitmore, CH2MHILLJanet Workman, URSJay Harbin, URSElspeth Sharp, URSDevan Phelan, Terra ThermJohn Meter, City of MesaDianna Saenz, AFCECSteve Willis, UXO Pro, ADEQ contractorBill Mabey, Tech Law

Attendees:NameMs. Cathy Jerrard

Mr. Len FuchsMr. Scott JohnstonMs. Mary HallMr. Dennis OffMr. Don Atkinson

Mr. Geoff Watkin

Mr. Jim HoltMr. Everett WessnerMr. Don SmallbeckMr. Leo PessinMr. Scott BouchieMr. Victor Gamez-GrijalvaMr. Matt FeskoMs. Pat TennantMr. Steve WillisCarolyn d'Almeida

Bill MabeyBeverly SelvageDelfina OlivarezEva Davis

Williams AR # 1617

Former Williams Air Force Base (AFB)Restoration Advisory Board (RAB)

Meeting Minutes

February 19, 2013, 7:15 p.m.Arizona State University Polytechnic Campus

Peralta Hall #1327171 E. Sonoran Arroyo Mall

Mesa, AZ

Page 4 of 87

OrganizationAir Force Civil Engineer Center (AFCEC) /Base Realignment andClosure (BRAC) Environmental Coordinator (BEC)/Air Force Co-chairRAB Community Co-chair/Gilbert residentAFCEC Public Affairs/ Napkin CommunicationsAFCEC Public Affairs/Napkin CommunicationsPhoenix-Mesa Gateway AirportArizona Department of Environmental Quality (ADEQ), ProjectManagerCherokee Nation Government Solutions, AFCEC technical supportcontractorRAB Member/Queen Creek residentAMEC, AFCEC remediation contractorAMEC, AFCEC remediation contractorGilbert residentCity of MesaCH2MHILLArizona State University (ASU) student/RAB memberArizona State University (ASU)UXO Pro, ADEQ technical support contractorU.S. Environmental Protection Agency (USEPA), Region 9, ProjectManagerTechLaw, USEPA technical support contractorMesa residentArizona Department of Environmental Quality (ADEQ), Public AffairsU.S. Environmental Protection Agency

Mr. Len Fuchs called the meeting to order at 7:15 p.m. and asked the attendees to introduce themselves.The RAB approved the November 2012 meeting minutes without changes. Ms. Cathy Jerrard provided abrief introduction and turned the presentation over to Mr. Everett Wessner.

Status Updates for ST035, ST012, FT002, SS017, and LF004Mr. Wessner presented updates for each site, see attached slides for more information. RAB andcommunity discussions for each site are presented below.

ST035, Former Base Gasoline Station Building 760Mr. Wessner summarized the slides presenting the site background, contaminants, and cleanup methodsin place. Soil vapor extraction (SVE) continues to remove fuel contaminants from the soil; groundwater

1


monitoring is ongoing. The goal is to achieve site closure under the state Leaking Underground StorageTank (LUST) regulations.

Since the last briefing, a remediation well has been installed near the former source area and four newdowngradient monitoring wells were also installed. The remediation well is screened in two distinctzones. If there is a need to remediate groundwater, the well will have two zones it can target.

Groundwater flow continues to trend to the east with a slight northeast trajectory.

Benzene in groundwater near the source area has degraded significantly and no longer exceeds standards.Toluene, xylenes, methyl tertiary butyl ether (MTBE) and 1,2-dibromoethane (EDB) are all below thestandard except for MTBE and 1,2 DCA in MW09 and in two of the new downgradient wells (MW19Sand MW20D). MW09 is located next to the new remediation well (RW1). There is a possibility that whenRW1 was installed and developed it might have caused some temporary contamination to get into MW09.After the next quarterly sampling event is conducted later in February 2013, an evaluation will beperformed to determine future actions. The additional data and the plan forward for groundwater will beavailable at the May RAB meeting.

The SVE system has done a nice job removing total petroleum hydrocarbons (TPH) and the extractionrate is starting to decrease and flatten out, which is what typically happens as an SVE system cleans up acontaminant source. The system achieved 91.7% operational uptime, with the downtime due to weatherand shutting the system off while the remediation well was installed. A total of 3,231 pounds or 524gallons of TPH were removed during the fourth quarter of 2012 and17,000 gallons of TPH have beenremoved to date. The next performance sampling event is taking place later in February 2013.

Questions asked during ST035 presentation:

Mr. Holt asked why nothing shows up between the two 1,2-dichloroethane (1,2-DCA) plumes on slide 18.Mr. Wessner responded that previously five wells had 1,2-DCA. Two of the wells that had 1,2-DCAbefore do not have it now. There has been a decoupling where there is no 1,2-DCA above standard so itwould appear to be two distinct plumes.

Mr. Holt asked if that would suggest a different source. Mr. Wessner responded that would be doubtful,but instead the 1,2-DCA may just be barely below the standard, and therefore, not showing up in thedepiction of the plume areas. Mr. Smallbeck added that the distinction is likely due to decoupling andchanges in the direction of groundwater flow that has occurred over time. Some of the concentrationshave decreased in wells or the flow direction has changed so there is not a continuous plume.

Mr. Holt asked if that means parts of the plume have been cleaned up, but the contamination is still therein other places. Mr. Smallbeck responded that is correct.

Mr. Holt asked if soil vapor extraction is being used. Mr. Smallbeck responded the soil vapor extraction isconcentrated near the source area for the vadose zone, and not throughout the groundwater plume area.Mr. Holt asked if there are groundwater collection points. Mr. Smallbeck responded that there are not butthe soil cleanup keeps contaminants from further impacting groundwater.

Mr. Holt noted the slides show a slight change in gradient February through November and asked if thatis due to the amount of water flow. Mr. Smallbeck responded that is the direction the water flows.Mr. Holt said the numbers were 0.003 ft/ft and now they are 0.0023 ft/ft. Mr. Smallbeck responded theychange a little bit, but those are very small numbers. It is a thousandth of a foot. Mr. Wessner added it isa really flat gradient. Mr. Holt asked what made the change. Mr. Wessner stated it could be seasonal. Thegradient is the rate at which the water is flowing through the site. It could be affected by a rain event orany number of things.

Regarding the SVE operation, Ms. Tennant said that when it was originally installed the expectation wasit would run for about five years. She asked what the prediction is now. Mr. Wessner responded thecleanup is flattening off. Mr. Smallbeck added that AMEC has installed modifications to the system toincrease the rate of extraction from some of the wells that have the highest remaining TPH mass. After six

2


months of operation with the modified system, AMEC will evaluate the results. By the end of 2013AMEC plans to conduct vapor sampling to see what residuals remain in the subsurface. If the remainingresiduals are low, AMEC would take soil samples to confirm that the SVE system has met the cleanupgoals. The system started running in 2010 and shutting down the system may be possible in 2014. Therehaven't been any detections of benzene in a few quarters and it is looking very good. Mr. Wessner addedthat the system is removing 500-plus gallons of petroleum every three months. It is still doing some goodand there is still some mass to be taken out, but it is good news that the rate is flattening out because thatmeans most of contamination has been removed.

ST012, Former Liquid Fuels Storage Operation

Mr. Wessner summarized the slides presenting the site background, contaminants, cleanup methods inplace, and the path forward. The primary soil contaminants for the site are petroleum hydrocarbons whichincludes benzene.

The 1992 OU-2 Record of Decision (ROD) pump-and-treat remedy was ineffective in cleaning thegroundwater. A pilot test for steam enhanced extraction technology was conducted and lead to a FocusedFeasibility Study (final FSS November 2012). The deep vadose zone, which is defined as greater than 25feet below ground surface (bgs), is currently being treated with an SVE system.

The water table is approximately 143 to 155 feet bgs, up 67 feet from1989. Mr. Wessner stated that therising groundwater is part of the problem. After the petroleum hydrocarbons were released, groundwaterlevels have risen, resulting in a portion of the material being submerged beneath the groundwater andtrapped within the soil pore spaces.

The November 2012 flow direction in the Upper Water Bearing Zone (UWBZ)/Cobble Zone (CZ) isnortheast. The flow in the Lower Saturated Zone (LSZ) is also northeast. During the November 2012sampling event, 27 wells were sampled. All concentrations of chemicals of concern (COC) are similar tohistorical data (2009-2011). The latest results showed an increase in some of the COC concentrations(such as benzene) in the UWBZ/CZ and a decrease in the LSZ.

The SVE system for the deep soil operated at 99.5% uptime from October through December 2012 with26,801 pounds (or 4,079 gallons) of TPH removed. Nine of the 27 wells are operating with an upwardtrend of product being removed from the deep soils. To date, 262,000 gallons of TPH have been removedand the next scheduled SVE performance monitoring is later in February 2013. Those results will beavailable by the next RAB meeting.

The groundwater containment system uses existing wells and equipment configured to allow operation ofa modified pump-and-treat system. Until a ROD amendment is signed to establish a new groundwaterremedy, the extraction system continues to operate to provide treatment and to reduce the potential forcontaminant migration in groundwater. The system began operating in January 2012, was shutdown inAugust for a retrofit, and was restarted in September 2012. Groundwater extraction is focused on thelower saturated zone. Extraction activities have removed and treated 9.5 million gallons of groundwaterand 181 pounds of benzene from January through December of 2012. The components remaining fromthe treatability study are now being used to contain the flow of groundwater until the final remedy can beput in place.

A draft Amended Proposed Plan was submitted January 2013 for regulatory review. A public meeting istentatively planned for April 18. Steam enhanced extraction and enhanced bioremediation is the AirForce's preferred treatment alternative. A Record of Decision is planned for summer 2013, RemedialDesign by fall 2013, and remedy construction in 2014. Annual groundwater monitoring will take place inNovember 2013.

Questions asked during ST012 presentation:

Mr. Holt asked if the figures show gradient intervals that are only five feet apart. Mr. Smallbeckresponded that the potentiometric surfaces are based on 1/2 foot (0.5 ft) contours.

3


Mr. Holt stated he meant from the Upper Zone to the Lower Zone. He said the number at the end of theline, in the upper zone show 1187 feet and in the Lower Zone show 1183 feet. So they are only four feetapart?

Mr. Watkin responded that those are the static water levels based on wells screened in two differentzones. The lower zone is deeper than the upper zone with a well screen in each zone. The water enters thescreen and then seeks its own level within the well and that's what is measured. It's called the static waterlevel. The well screen is actually deeper, but the water level rises to its own level and it is the waterpressure that is being measured.

Mr. Holt asked if the water pressure in the lower zone is bringing the lower level water up to within fivefeet of the level in the upper zone.

Mr. Watkin indicated it was and added that measuring the levels in all the different wells is a way todetermine the gradient. The goal is to figure out how groundwater flows in the lower zone because thezones are geologically separated.

Mr. Holt stated it was thought that there was a non-permeable layer between the two. Mr. Smallbeckresponded it is not totally non-permeable. Water does move in between the layers but it is a definiteseparation from a hydrogeologic and pressure perspective.

Mr. Watkin stated that the well screens are at different depths. There are several wells in the upper zoneand several in the lower zone. The wells are separate so it can be determined out how water is movingbetween the two different zones. By taking measurements in all the wells in the upper zone it can bedetermined where the water rises from those well screens, and the direction and how fast the water isflowing.

Mr. Holt stated the numbers are not really the level of the upper and lower zone. They are the result ofpressure in those zones inside the wells. Mr. Watkin responded they are the level that the waterequilibrates at from each of those zones. It's not a measurement of the actual water in the zone; it's ameasurement of how the water behaves in the zone.

Mr. Holt stated one concern about the mixing of the upper and lower zones is it seems like the upper zoneis where the contamination is. Mr. Smallbeck responded it is actually the opposite; most of thecontamination is in the lower zone. Mr. Wessner referenced slide 30 as an example of the one well thathas groundwater contamination above action levels in the upper zone. Mr. Wessner referenced slide 31 asan example of multiple wells where groundwater contamination is above action levels in the lower zone.

Mr. Pessin asked why the ST012 SVE unit had 99.5% operational uptime when ST035 system operated at91.7%. Mr. Smallbeck responded that ST012 is a much bigger system and it was able to operate during aperiod when there was cold weather and rain that caused the system to shut down ST035. (Post-meetingnote: The ST035 system also had a planned shutdown during installation of a groundwater remediationwell in the source area.)

Mr. Fesko asked if the RAB members would be notified of the location and time of the Proposed PlanPublic meeting. The RAB members will receive a fact sheet notifying them of the Proposed Plan locationand time.

FT002 Former Fire Training Area No. 2Mr. Wessner stated soil contamination is the problem at this site and the COCs are benzene, chloroform,and 1,4-dichlorobenzene. There is no evidence that the site has impacted groundwater. A ROD was put inplace in 1996. It had a bioventing remedy for the soil but the soil cleanup goals were not achieved withthat remedy and the system was shut down. There is currently a Declaration of Environmental UseRestriction (DEUR) to prohibit residential use on the site because the goals were not met. The DEUR alsorequires applicable soil management procedures for excavations below 5 feet.

4


On November 28, 2012, AMEC completed a Soil and Soil Vapor Sampling Work Plan with regulatoryconcurrence for sampling to determine if contaminant levels had decreased to the ROD cleanup goalsover the past 15 years.

A soil gas survey was performed December 4, 2012 and 10 soil gas samples were collected at the formerEastern Burn Pit. A soil investigation was performed January 7-18, 2013. During the investigation, 11 soilborings were drilled and sampled to 100 feet bgs at the former burn pits. ADEQ also collected samples toverify results and to evaluate the site for additional contaminants. Data will be evaluated and if RODcleanup goals are achieved, then a closure report for unrestricted closure of the site will be prepared forregulatory review in April 2013.

Questions asked during FT002 presentation:

There were none.

SS017, Former Pesticide/Paint ShopMr. Wessner provided background and a status update for SS017. SS017 is the old pesticide/paint shopand the chemical of concern is dieldrin in both the soil and groundwater. There was a removal action in2000 when soil contaminated with dieldrin was excavated. AMEC continues to monitor the groundwaterto evaluate the presence of dieldrin. There are levels of dieldrin in some wells that intermittently exceedscreening levels but there is no regulatory standard for dieldrin. The annual sampling is done in August.The Draft OU-6 ROD was completed in March 2012. The Air Force is preparing an updated riskevaluation for regulatory review.

Questions asked during SS017 presentation:

There were none.

LF004, Former Solid Waste LandfillMr. Wessner said that the OU-1 ROD dealt with soil contaminants at LF004, including dieldrin andberyllium in surface soil, and the remedy, a permeable cap, was successfully implemented. Thegroundwater has started to rise and as a result, groundwater impacts are being seen. There are ongoingsemiannual groundwater sampling events. The COCs for groundwater and subsurface soil areperchloroethylene (PCE) and trichloroethylene (TCE). The impacts to groundwater are bounded by thegroundwater monitoring network and a solution is being evaluated in the LF004 Focused FeasibilityStudy.

The semi-annual groundwater sampling event was conducted at 54 wells in November 2012 and thereport will be submitted in early 2013. TCE and PCE plumes are stable and adequately defined.Groundwater results indicate historically decreasing concentrations of TCE and PCE in hot spot areas;however, PCE in LF01-W19 increased in the November 2012 event. The next groundwater samplingevent will be May 2013.

The Draft Final Focused Feasibility Study is under regulatory review and a Proposed Plan public meetingis planned for May 18, 2013. A Record of Decision is planned for summer 2013, Remedial Design by fall2013, and remedy construction in 2014. Semi-annual groundwater monitoring will take place in May2013 and landfill maintenance is ongoing.

Questions asked during LF004 presentation:

Mr. Bouchie asked if the PCE and TCE concentrations shown are from the upper or middle zones or arejust the highest number. Mr. Wessner responded that the figures are shown by zone and the highestconcentrations wells (17 and 19) for PCE and TCE at the site are in the middle zone.

Contracting UpdateMs. Jerrard provided an update on contracting issues. The Army Corps of Engineers in Huntsville,Alabama is scheduled to award the contract for Munitions Response Site XU403 (located in Parcel N

5


Debris Area) in February 2013. Once the contractor is chosen there will be more information on what theschedule is. The anticipated schedule is that all of the work plans will be submitted in the March to Junetimeframe.

There will be several different work plans submitted. One will be for the munitions removal, another onewill be for some chemical sampling. There will also be an archeological work plan to handle thearcheological areas of the site and there will be a special chemicals safety submission that has to gothrough several organizations for approval. Field work is anticipated to start in July 2013 and take twomonths to complete. It will include munitions removal, environmental sampling and debris removal.Following the completion of the field work there will be several different completion reports: onepertaining to environmental results and one pertaining to munitions results. The chemical safetysubmission also has to be closed out. In addition, 34 acres of the site were previously cleared formunitions. A No Further Action document for those 34 acres must be prepared as well.

Questions asked during Contracting update:

There were none.

Meeting Wrap-upThat concluded the information portion of the evening. There were no action items identified as a resultof the meeting. Agenda items for the May 2013 RAB included:

One item proposed is to have the munitions response contractor and the Corps of Engineersattend the next meeting to present the project.It was also suggested that the LF004 Proposed Plan public meeting be held at the May 14 RABmeeting. An abbreviated RAB meeting would be held to discuss the sites that have the mostactivity. Followed by an update from the Corps of Engineers and the LF004 Proposed Plan publicmeeting. Mr. Fesko stated that it would be nice to get at least a quick update on each of the sites.Ms. Jerrard agreed.

The next meeting on the schedule is a Proposed Plan public meeting for ST012 which will be heldtentatively on April 18, 2013.

Mr. Fuchs adjourned the meeting at 8:15 p.m.

The next Williams RAB meeting is scheduled for Tuesday, May 14, 2013 at 7:15 p.m. at the ArizonaState University Polytechnic Campus.

Attachments:

February 19, 2013 RAB meeting slide presentation

6

Former Williams AFB Restoration Advisory Board MeetingWi1116M9 AR

Date: 14 May, 2013

Page 10 of 87

Please sign in. If your information has changed since you last attended,please place an asterisllill next to your name.

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WilElfams AR # Page 11 of 87

Headquarters U.S. Air ForceIntegrity - Service - Excellence

Former Williams AFBRestoration Advisory Board

(RAB)

February 19, 2013

Arizona State Polytechnic CampusPeralta Hall Room 132

7171 E. Sonoran Arroyo Mall Rd.Mesa, AZ

2/19/2013

Wil617ms AR # Page 12 of 87


Welcome& Introductions

Presented by:Mr. Len Fuchs / Ms. Catherine Jerrard,

RAB Community Co-Chairsand Scott Johnston

2/19/2013


Welcome & Introductions

Mr. Len Fuchs, RAB Community Co-Chair

Ms. Catherine Jerrard, Air Force Civil Engineer Center(AFCEC), PM/BEC and RAB Co-Chair

Ms. Carolyn d'Almeida, Project Manager, U.S.Environmental Protection Agency (EPA), Region 9

. Mr. Donald Atkinson, Project Manager, ArizonaDepartment of Environmental Quality (ADEQ)

2/19/2013 Integrity - Service - Excellence

WilElizms AR # Page 14 of 87

Agenda

Time

7:15 PM

7:30-8:30 PM

Topic

RAB Meeting Convenes

Welcome and introductionsCommunity co-chair remarksReview Nov 2012 meeting minutesand action items

Program Updates

ST035 UpdateNov 2012 Groundwater (GW) resultsOct-Dec 2012 Soil Vapor Extraction (SVE)Performance ResultsPath Forward

ST012 Status UpdateNov 2012 GW ResultsOct-Dec 2012 SVE Performance ResultsGW Containment Study ResultsST012 FFS, Proposed Plan and Preferred AlternativePath Forward

Presenter

Mr. Len FuchsMs. Catherine JerrardMr. Scott Johnston

Ms. Catherine JerrardMr. Everett Wessner

Integrity - Service - Excellence


Agenda Continued

Time Topic Presenter

7:30-8:30 PM Program Updates continued Mr. Everett WessnerFT002 Status Update

Summary of Field Activities (Dec 12- Jan 13)Path Forward

8:30 PM

9:00 PM

SS017 Status UpdateOU6 Record of Decision (ROD) statusPath Forward

LF004 StatusNov 2012 GW resultsFFS Remedial AlternativesPath Forward

Meeting wrap-up Ms. Catherine JerrardOther Active ProjectsReview action items for next meetingCall for agenda items for next meetingPropose next RAB meeting - May 14, 2013

Adjourn Mr. Len Fuchs




Program UpdatesSites ST035, ST012, FT002,

SS017, and LF004

Presented by:Ms. Catherine Jerrard, AFCEC

Mr. Everett Wessner, AM EC



Site ST035, FormerBuilding 760 USTs

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Site ST035 Site Background

Building 760 gas station and oil/water separatorGas dispensing until 1986Tank and dispensing equipment removed in 1993-1994Oil/water separator removed in 1996

Vadose zone soil chemicals of concern (COCs)Benzene

Groundwater COCsBenzene, toluene, ethylbenzene, xylenes (BTEX)1,2-Dibromoethane (EDB)Methyl tertiary butyl ether (MTBE)1,2-Dichloroethane (DCA)

Soil Vapor Extraction (SVE) system to treat COCs in vadose zone soil inoperationSite cleanup regulated by ADEQ under Leaking Underground Storage Tank(LUST) regulation (R18-12-263)Ongoing quarterly groundwater monitoring


Site ST035 GroundikafeiMonitorPtiii *date* Oct-Nov 2012 New Well Installation

1 new remediation well (RW1) installed near former source area2 discreet screen intervals to monitor and/or remediate the CobbleZone (CZ) and Upper Water Bearing Zone (UWBZ)

4 new monitoring wells (MW19S, MW19D, MW20S, and MW20D)installed downgradient of wells MW17 and MW18 for further plumedefinition2 discreet screen intervals per well to monitor downgradient COCconcentrations in the CZ and UWBZSampled during Nov 2012 Quarterly Event


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LegendNested Soil Vapor Extraction Well Location

Nested Vapor Monitoring Point Location

Ile Groundwater Monitoring Well Location

Decommissioned Groundwater MonitoringWell Location

Approximate Location of FormerBuilding 760

Approximate Location of FormerUnderground StorageTank

Approximate Location of Former BelowGrade Product Distribution Line

monitoringN

Feet A25 50 100

Working CopyAnnual 2012

Groundwater Monitoring ReportSite ST035 - Former Williams Air Force Base

Mesa, Arizona

ST035 Monitoring Well FIGURE

Location Map 2-1

Job N. 9101110001PM. EWDate. 1/30f2013 amed3Stale: 1^. 100.

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2/19/2013 Integrity - Service - Excellence 11

Site ST035 Groundwafer# *dateAR

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Groundwater Monitoring Well Location

Potentiometric Contour Line- (Dashed Where Inferred) (ft amsi)

(Contour Interval = 0.5 ft)

Groundwater Flow Directionwith Gradient (ft/ft)


Approximate Location of FormerUnderground StorageTank

Approximate Location of Former Below- Grade Product Distribution Line

Notes:

B760-MW12 Monitoring Well Identification1195.20 Groundwater Elevation (ft arm!)

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Mesa, Arizona

ST035 Potentiometric Surface Map FIGURE

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1196 04

19760.1/1W09/1955)

1194_30

19760419906R1196.20

8769-9,11,916119.989. s _

19760.1.199121195 10

Gradient = 0.003 ft /ft)

8750 -M WO OR1195:19 B760-1M17

1193.69

13760-1M/191195 99

B760-M9V18c, 1195.05

February 2012

8760-11/1W061i1195.90

WO,

ti13750-1919908R

1195 32 4B760.109913

1195 29

19700-1.4,1171199.92

AaB760.MW18

1193.90

August 2012

87604.1W12

5760-0/19906191195,37 ,-, 1,

1195 16

97' 0 -MW16

mite- r_Flow DireOlen

(Gradient = 0.04/ft4

8790,149/171193.87

13760.MW13.95 21

57.60.MW181113.83

May 2012

X

5760-519,1111195 93

13760,11AVV06Ft

1195.63

II Pn

13760-38614t 1 199 91

15,

19760-MWO91195.

glIMMe...4,2 _

Gritoundr leiFlow.Direction

'", 20

(Gr

.00

adient = 0.0023 ftLit;t

13760-MIN0BR1195 46

19760,1991311.95 34

13760-MW16.119422

760-1611,918

1194.96

B760-MW2051193 77

November 2012

LegendGroundwater Monitoring Well Location

Potentiometric Contour Line- (Dashed Where Inferred) (ftains')


Groundwater Flow Direction with111 Gradient (ft/ft)


Approximate Location of FormerNM Underground StorageTank


Notes:

B760-MW12 Monitoring Well Identification1190.20 Groundwater Elevation (ft ems!)

9 Feet

ft erns! Feet above mean sea level

o 50 100 200



Mesa, Arizona

ST035 Potentiometric Surface Map FIGURE

Quarterly 2012 3-1

Job No. 9181110001PM: EWDate: 1/30/2013 ame0Scale: 1" =200'

0.890.97.ro 99.


01Site ST035 GroundWhlerMonitorirt211pdate4N.ZP Nov 2012 Sampling Event

17 wells sampled (4 new monitoring wells included)

Groundwater flowing west to east

Benzene detected in 7 wells (8 wells in Aug 2012):Tier 1 Standard = 5 micrograms per liter (gg/L)7 wells < 5 gg/L (7 wells in Aug 2012)0 wells > 5 gg/L (0 wells in Aug 2012)

1,2-DCA detected in 7 wells (6 wells in Aug 2012)Tier 1 Standard = 5 gg/L2 wells < 5 gg/L - (1 well in Aug 2012)5 wells > 5 gg/L - (5 wells in Aug 2012); includes MW19S andMW2OD (new downgradient wells)


Site ST035 Groundiii6leiVonitorirt 211i3date4* Nov 2012 Sampling Event

MTBE detected in 7 wells (3 wells in Aug 2012)Tier 1 Standard = 94 .t,g/L4 wells < 94 gg/L - (3 wells in Aug 2012)3 wells > 94 gg/L - (0 wells in Aug 2012)

MWO9 (existing well next to new RW1)MW19S and MW20D (new downgradient wells)


Site ST035 GrOiiiidst4Mer MonitOririglii3dateNov 2012 Results > Tier 1 Standards

0760-MW09

GECAOEQ Tier

Nov-121 SW.MTBE sa 120/1201,2-OCA 5 48147

1114.1

X11

D780-MW10ADEQ Tier

1 SW. Nov-12

6760 -MW 795

vf 'IMTBE1 2-DCA

878000N17

1

ADEQ Tier1 SW. Nov-12

r

11A

0 0760-91W1956700-MW190-

8760-M8200'67110MV/200

13760-MW 200

COCADEQ Tier Results

Nov-121 SW.MTBE 94 /101 2-0CA 5 7.7

Legend


Approximate Location of FormerBuildi ng 760

mg Approximate Locatton of FernierUnderground StorageTank

Approximate Location of Former eclowGrade Product Distribution Line

Notes:

ONO-1M M Mongoring Well Henbileolion8700616 101 MOngoring 8001010 no aealytee 00100100 abOsie

the RL during 2012

OriginadOupicate Rosaha

Analylleal result rpg/Ll equals or eNeeds theapplicable ADE() UST Test 1 Cumuli.. Action01311112111. For MTEE, A050 guidOnce PeceSeSfor a Correa.. Action Standard of 54 141(1. whenM drinking wrier wee is Oldie. (9000. 2002)

140. Microgram W. liter

l.2 -FICA 2-dideoroethena0000 Somme Department of Eaurronmenisi (MalayCOC Chemise of COIICEIll

MDL Method OeteMion Lirrd

MBE Methy1 tertiary butyl otherRL Reporting Limn

UST Underground Riorege Taos

.5117 1

0 25 50 100

Fool


Groundwater Monitoring ReportSite 5T035 - Former Williams Air Force Base

Mesa, Arizona

ST035 COC Concentration* FIGURE

November 2012 3-4a

0 319101119031Pat:AM: amecOtn etfaale:cele: 1' r

....


Site ST035 Grounwarer Monitoring UpdateNov 2012 MTBE lsoconcentration Map

11780414,415.

p-disc.,:

13760-POW-11<5 0 Ll

0760-MINC9130.0/120.0 Pan y

0760.MWO6RA5 017

29

islit 14a .111,111

la6,mil._

- *

;11#,

4a

13700-1,111414 0<5.0

111 mi

../

IR Mt .94 11, ik fibepol6v117 ' -6; if

t.611 1"°

B7604AW20illko7a`F

r

R

LegendMTBE Concentrations (mit) in Groundwater(Dashed Where Inferred)

594 pg /Le

ADEQ UST Der 1 Corrective Action Standard = 04 pg/L

4 Groundwater Monitoring Well Location


111.Approximate Location of FormerUnderground StorageTank

Approximate Location of Former Below---- Grade Product Distribution Line

Notes:11760.MW19S

1200

odpo,q-<1.0

MTESE

ADEQ

MDLRL

UST

Monitoring Well Identif cationMTBE Concentration (pg/L)(Results that are ItaRlzad and bolded epochor eaceed the ADEL! UST Tier 1 CorrectiveAction Standard of 04 pg/L)OrIginanuplicate ResultsMicrogram per literNot detected at or above the RLMethyl tertiary butyl etherArizona Department of Environmental QualityThe analyte was positively identified but theassociated concentration Isar estimationabove the MDL and below the RLMethod Detection LimitReporting LimitThe enelyte wee analyzed Tor, but not detectedat or above the RL shownUnderground Storage Tank

o 25 50 100

Feet ADraft

Annual 2012Groundwater Monitoring Report

Site ST035 - Former Williams Air Force BaseMesa, Arizona

ST035 MTBE Concentrations FIGUREin Groundwater

November 2012 Event 3-7

Job No. 9101110001

amed9PM- EWea*, vieqe+3Scale: I" = 100t

-.s-ee


Site ST035 Grouriiiater Monitonh4 UpdateNov 2012 1,2-DCA lsoconcentration Map

Legend1,2-DCA Concentrations iiigfL) in Groundwater

{Dashed Where Inferred)

411". i."12

ADEQ UST Tler I' Corrective Action Standard c 5 go/L



inApproximate Location of FormerUnderground StorageTank


Notes:weirmoNo Monitoring Wet Identification

07 12-0CA Concentration (wit)(Results that are italicized arld bolded equal oremceed the ADECI LIST Tier I Corrective ActionStandard of 5 AIL)

20/2.7 OtiginabDupticate Results{..;12 Microgram per tier01 .0 Not detected at or above the RL

1.2-DCA 1 2-DichioniethaneADEO Arizona Department of Environmental Duality

F The analyte was positively Identified but theassociated ctn.:entre-1am iS an estrnaton abovethe MDL and below the RLThe anolyte wee positively identified, estimateddue to mains effect.

MDL Method Detection LimitRL Reporting LinnLI The analyte was analyzed fors but not detected at

or above the RL shownUST Underground Storage Tank

0 25 50 100


Groundwater Monitoring ReportSite ST035 - Farmer Williams Air Force Base

Mesa, Arizona

ST035 1,2-DCA Concentrations FiGURE

in GroundwaterNovember 2012 Event 34

1

Job No, eimoop,PR EWDate 2/4/212 amee9Scale 1' o 1017


WilElfams AR #

gife2trO352012 Annual Groundwater Summary

Concentrations of benzene in the source area have significantlydecreased since SVE startup in 2010

Toluene, Xylenes, MTBE, and EDB were below the Tier 1 Standards,except for the Nov 2012 MTBE results at MWO9 (next to new RW1) andMW19S & MW20D (new downgradient wells)

Concentrations of MTBE and 1,2-DCA have increased at the formersource area and immediately downgradient

1,2-DCA and MTBE were detected above the Tier 1 Standard at newdowngradient wells MW19S and MW19D, respectively

Ongoing quarterly groundwater sampling - Next event Feb 2013



Site ST035 SVE System Update

Oct - Dec 2012

. 91.7% operational uptime

Total PetroleumHydrocarbons (TPH)removed - 3,231 pounds or524 gallons(646 gallons removed fromJuly-Sept 2012)

11 of 15 SVE wells operating(same as July-Sept 2012)



Site ST035 SVE System Performance

35,000

30,000

sal 25,000s_

a 20,000

0

cca, 15,000

a0

10,000(.7

25,000

00-

98.4%

99.8%

99.9%

The value above the bar represents thepercentage of time the system was

operational during that sampling period.

91.9%99.7%

901

91.7%

11§'.6!" 6

P'z' N%

O 06" sa N 06'

IlEstimated TPH Mass Removed per Quarter (Cumulative Volume TPH Removed

18,000

- 16,000

- 14,000

- 12,000

- 10,000

8,000

6,000

4,000

2,000



Site ST035 SVE System Summary

Average mass removal of TPH is declining as expected

17,000 gallons of TPH removed to date

SVE system continues operation within permit emissionrequirements

Decreased operational time due to weather related shutdowns

Next performance sampling Feb 2013


Wii(117ms AR # Page 33 of 87

Site ST035 Path Forward

Complete groundwater characterization and performremediation as needed

Continue SVE operation

Ongoing quarterly groundwater sampling - Next event Feb2013

Updated site strategy to be developed after February 2013groundwater sampling event

Achieve site closure under LUST regulation (R18-12-263.04)



Site ST012, FormerLiquid Fuels Storage

Area


Site ST012 Location Map

Ray-Rd

ii

e

aa

w

Willi ams=Fiel d-Rd

Legend

ST012 Boundary

C:I Former Williams AFB Boundary

0 025 5

Miles

Job No. 9101110001PM: EWDate: 05/09/2012Scale: 1" = 0.5 mile

Tlemapsioralm.beekomnaMalagemamwo.AmmakastrWtrise wttlAPAEC PnleotNimter9101113:01. TM map la

loWeekcanrneManNumamytirapanymo1.rupcomeswilogtwarra.AMEGaseimealoisM.almotor.mot,InceueMalys.t.pn/M.

Former Williams Air Force BaseMesa, Arizona

ST012 Site Location MapFIGURE

1-2



Site ST012 Site Background

Former liquid fuels storage operation

19 underground storage tanks (USTs) and piping removed in 1990

COCs in soil and groundwater are TPH and benzene

Shallow soil (< 25 feet deep) cleanup achieved (1996): OU-2 ROD 1992

Deep vadose zone soil (> 25 feet deep) currently treated by SVE: OU-2RODA 1996

Water table (-143 to 155 feet below ground surface [bgs]) has risen -67feet since 1989

OU-2 ROD groundwater pump and treat remedy ineffective-Alternative remedies evaluated in a Focused Feasibility Study (FFS), Nov 2012

Ongoing annual groundwater monitoring (Nov)



Site ST012 Groundwater COCs

COC OU-2 ROD Action Level (pg/L)

Volatile Organic Compounds (VOCs)

Benzene 5

1,2-DCA 5

Ethylbenzene 700Methylene Chloride 5

Naphthalene 28PCE 5

Toluene 1,000TCFME 2,100

Total Xylenes 10,000

Semi-volatile Organic Compounds (SVOCs)

bis(2-Ethylhexyl)phthalate 6

2-Methylnaphthalene NE

2-Methylphenol 8704-Methylphenol 870

Phenol 4,200

Metals

Antimony 6

Chromium (Total) 100

Copper 1,300Lead 15

Nickel 100

Silver 50

Zinc 1,400


4.1Upper Water Bearing Zone/Cobble Zone (UWBZ/CZ)

Site ST012 Groundwater Monitoring8UpdateNov 2012 Flow Directions

-01

T

Unity Ave

ix

,i, s X

1I X

X

i -- I I.'1

.... X " X

.., . 1.I 1 ii

X,

57012.U,21190 23

U7ysses Ave -um. v ST012.Ut2

191)2 511'90 45

drO,1,

57{11 2-1.175,..1 D4

7012-0O2

57012-UO2

4

ti 11°"1.

5

e

51,112-.3

-i. xi

\ \ \ ...-\..,''si,

'.9-:,ii --0

ge

5701241192 .11.,5

0

a

51'012.CP

as

X90

P1

Legend

Groundwater Monitoring Well Location4 Screened in the UWBZ,C2

Potentiometric Contour Line(Dashed Where Inferred) (ft ams1)(Contour Interval = 0.5 ft)

Groundwater Flow Directionwith Gradient (Mt)

Fenceline

3 ST012 Boundary

Notes:STo12 -REI-1A Monitoring Well Identification

1 l8t95 Groundwater Elevation di wrisli<11fiebo, Groundwater elevation not used for

potentionnetric surfaceft Feetamsi Feet above mean sea level

tit/EV/CZ Upper Water Bearing Zone I Cobble Zone

0 50 1W 200

11=1 Feet AWorking CopyAnnual 2012


Mesa, Arizona

ST012 UWBZ/CZ PotentiometricSurface Map

November 2012

FIGURE

3-2

Job No. 9101110001PM: VADote ar112913 amec9


Site ST012 Groundwater Monitoriag9UpdateNov 2012 Flow Directions

Lower Saturated Zone (LSZ)

_ .

Unity Ave

tt,ti

1 A

51,7124/38vla5 1,3

\ "IvM124107

ST012.W121107 06A

wo`kceck°0\el

ST012.W34

ST0t2.4V1.8

ST(112AN29

Reserve Center

Imo

ST0124,1351107i. 35

1182 62

iR

5 Screened in the LSZ

Legend


Polentiornetrie Contour Line- (Dashed Where Inferred) (ft airis.1).


Groundwater Flow Directionwith Gradient (ftift)

Fenceline

c ST012 Boundary

Notes:

ST0121113.1C Monitoring Well Identification1185.25 Groundwater gievatIon rfl ams4

ft Feet

ft ems! Feet above mean sea level1.S2 Lower Saturated Zone

50 100 200



Mesa, Arizona

ST012 LSZ PotentiometricSurface Map

November 2012

FIGURE

3-3

Job No. 9191110001PM EMI

Date: ZIMMSSnake I". 200' ame0


Site ST012 GroundimieAli *Monitor l ticiateNov 2012 Results > Action Levels UWBZ/CZ

ST012-RB -1A

Analyte Units

OU-2 RODActionLevel 11120/2012

VOCsBenzene og/L 5.0 5500Naphthalene pgIL 28.0 37

ST012-10125.,

- 57012.110-1A511012-0O2, i

\ ST1112,13115'

ST012,50.204 /

ST01,035

;ysse, Avert.

STDISIA13

ST012-X01S hr

U.S. ArmyReserve-Center

ST012.0O3

ii

, a

I "

ST012-011:

0 I -

STOISCeat

0 %

4511012,127/ 01r012.13.3A

/ /

/ ST012-008

C-3

Legend

Groundwater Monitoring Well LocationScreened in the UWBZJCZ

Fenceline

ST012 Boundary

No-to,

ST012-RB-1A Monitoring Well Identification

Analytical result equals Or heapplicable 0U-2 ROD Aebon Level

pg/L Microgram per liter

COC Chemicals of concernOU Operable Unit

ROD Record o(Decismn

UWDZ/CZ Upper Water Bearing Zone/Cobble ZoneVOCs Volatile Organic Compounds

37

0 50 100 209

Feel AWorking CopyAnnual 2012


Mesa, Arizona

ST012 UWBZICZ COC FIGURE

ConcentrationsNovember 2012 3-4

Job No 5101110001NM:NM:

DateI,e/2;2013 amect9Scale I "= 205'


Site ST012 GroundmleAli#MonitorPiiial tfliciateNov 2012 Results > Action Levels LSZ

ST012-W13

Analyte Units

OU-2 RODActionLevel 1112812012

VOCsBenzene mil_ 5.0 2600Naphthalene pg/L 28.13 31

Ulysses Ave

5T012.W13

-totIF

ST0124107

I

Ana lyte Units


VOCsBenzene pg/L 5.0 1600

E

51312

'axs1

YL2-14138 \V0124,2

5T012 -W11

Ana lyte Units

OU-2 RODActionLevel 11/28/2012

VOCsBenzene pg/L 5.0 84

tiST212.035

ST0,2407

-034

ST012-RB-2C

Ana lyte Units

OU-2 RODActionLevel 11/29/2012

VOCsBenzene pg/L 5.0 9200Naphthalene pg/L 28.0 43Toluene pg/L 1000 3500

57012.52,2G

0,1012.,20

ST012-W29OU-2 ROD

Action 1111212012

Ana lyte Units Level 11112/2012 DuplicateTotal Metals

Chromium rngfl.. 0,1 0.42 0.38Nickel rrig/L 0.1 0.25 0.23

ST012-W07

Analyte Units


11127/2012

DuplicateVOCs

Benzene pg/L I 5.0 730 820

Legend

Groundwater Monitoring Well Locationti Screened in the LSZ

Fenceline

c 3 ST012 Boundary

Notes:9T012-RR-20 Monitoring Welt Identification

Analytical result equate or exceeds theapplicable OU-2 ROD Action Levet.

pgrt. microgram per liter

COC Chemicals 01004C6m

LSZ Lower Saturated Zone

mge_ m agra ma per !her

ou 00ml:141101ROD Record 01 Decision

VOCs Volatile Organic Cu wounds

50 100 200



Mesa. Arizona

ST012 LSZ COC Concentrations FIGURE

November 2012 3-5

Job No 9101110001PM. FA,1701., 21112013

=am5.10. ece?I" = 200'

---11,7:11,--:= --...1 --


,d Site ST012 GroundWitseliMonitorPiiii Cjiciate4.1Nov 2012 Benzene Results > Action Level UWBZ/CZ

- so"

Ulysses Ave51012.55021s-roz-col,

5U

STO 12-U12 90010.e.lnU 5 50 0

--- -m \

1J.S. ArmyWage rt BmCerlter

-ST012-005

.1

ti

ous

k

Surly-Ca

Legend

Benzene Concentrations {poll-) in Groundwater

5-999 pgit (011_1-2 ROD Action Level = 5 tipiLt

1000.4909 pg/L

000 pgIL

Groundwater Monitonng Well LocationScreened in the UWBZ/CZ

Fenceline

ST012 Boundary

Notes:

ST012-Re-1A Monrrorimg Wet Idenlrfisaticre5500 Benzene Coottanlart5aw 1pg/L5

{Recruits that are tatared and bolded ecual or100110 Ina 011 -2 ROO ROC. LePel Of 54.94

101 Microgram per her'1 -0 Not detected al or above the RL

F The analyla was positively kiesliFsed but Useas-sot-418d concertaion is an esimotbn [slowthe MIX and below the RL

CsiSeCtios Lollt

OU Operable UnitRL Reporting twat

ROD Record of NotionLI The analyse wee analyzed for, bat not detected

er above lne RL eta.MEV/CZ UMW Wale, soaring zone iCerkaa Zete

0 50 WO 200

Fwel AWorking CopyAnnual 2012

Groundwater Monitoring ReportSite ST012 - Fenner Williams Air Force Base

tvtesa, Arizona

ST012 UWBZICZ Benzene FIGURE

Concentrations in GroundwaterNovember 2012 3.6

91011100iRif EWJet No.

Tial4: 2razei

ameeNo.

Saw: Ss Me

o.-


Site ST012 GroundimtseAli#MonitorPiiii tfliciateNov 2012 Benzene Results > Action Level LSZ

51012411/120 F

51012-1/04,29F

Ulysses Ave51-012.07

1600

51112-WI32600

5101 RS IC9200

sriez-uvoe<16V

1

510124511 ,98

WS ArmyReserve-Center 51012 037

700/810

Legend

Benzene Concentrations (RV in Groundwater

5-999 pgIL (OU-2 ROD Action Level = 5 pa)

1000-4999 pgIL

50,00 pg/L

Groundwater Monitoring Well Location6' Screened in the LSZ

Fenceline

C3 ST012 Boundary

Notes,

31012-Ria-aC Monitoring Well Identification9200 Benzene Concentration (pgiLl

(Results that are itel0ci0091 end bolded equal orexceed the OU-2 ROD Action Level of 5 poil..)

7301820 Original/duplicate resultspgirt. Microgram per liter<1.0 Not detected at or above the RL

F The analyte was positively identified but theassociated concentration is an estimation abovethe MDL and below the RL

LSZ Lower Saturated ZoneMDL Method Detection Limit

OU Operable UnitRL Reporting Limit

ROD Record of Decision

1.1 The a nalyte was analyzed inr, but net detectedat or above the RL shown

0 50 100 200

1=1Feet AWorking CopyAnnual 2012


Mesa, Arizona

ST012 LSZ Benzene FIGURE

Concentrations in GroundwaterNovember 2012 3-7

Joh No 9101110001PM EvVDate_ 20/2013Scale 1" = 200' amed9


,d Site ST012 GroundimtseAli#MonitorPiiii updateNov 2012 Naphthalene Results > Action Level LSZ

/ST012 r/

A./

Ulysses Ave6,-4-

4 #I

S1-012-V412

5T072-W111

_

ST012-.107

ST012 W29

/

57012-W37

ArmyReserve Center

08.541ST012-W24

F

4,rs fi

1 4 '

0

Iw

Legend

Naphthalene Concentrations (pot)in Groundwater

528 pg/L (0U-2 ROD Action Level = 28 pg/L)

Groundwater Monitoring Well LocationScreened in the LSZ

Fenceline

1:::: ST012 Boundary

Notes,

51012-R8-2C Mortitorng Well Iclentificaton43 Naphthalene Concentration (140

(Result that are li.VICIrier end bOlded eooal01exceed the OU-2 ROD Action Level of 20 pg/L)

4.8/5.4I Original/duplicele reSultSpg/L Microgram per liter

vi 0 Not detected at or above the RLa Sample concentration is similar to that found in

an associated blankF The enelvle wes positively identified but the

associated concentration is an estimation shovethe MDL and below the RL

LSZ Lower Saturated ZonaMDL Method Detection Limit

Olt Operable UnitRL Reporting Limit

ROD Record of Decision

LI The analyte was analyzed for, but not detectedat or above the RL shown

0 50 100 200

Peet AWorking CopyAnnual 2012


Mesa, Arizona

ST012 LSZ Naphthalene FIGURE

Concentrations in GroundwaterNovember 2012 3-8

Jog No p10111ciopiM: cy:u.

Qatst_Pilta amec50Scale 1.= 2nOl


Site ST012 GroundiVastei MonitoPtin4gaiii3dateNov 2012 Sampling Event Summary

27 wells sampled

Groundwaterflows southwestto northeast

All COCconcentrationsare similar tohistorical (2009-2011) data, latestresults increasedin UWBZ/CZ anddecreased in LSZ

No. WellsAbove ActionLevel - Nov

No. WellsAbove ActionLevel - Nov

Analyte 2012 2011

Benzene 6 7

Naphthalene 3 5

Toluene 1 2



Site ST012 SVE System Update

Oct Dec 2012

99.5% operational uptime

TPH removed - 26,801pounds or 4,079 gallons-(3,870 gallons in Jul-Sept2012)

9 of 27 SVE wells operating(same as July-Sept 2012)


WiliSfams AR # Page 47 of 87

** Site ST012 SVE System Performance

200,000

180,000

160,000

a)&_ 140,000

ca

120,000

100,000-0a)

O 80,000Ea)

60,000

40,000co

0_ 20,000

0

0

The value above each barrepresents the percentage of time

For the 1st quarter of 2010,the system only operated from

23 February through 31

rMA rdMilI VAIM I

7 50,0006co

o g6

Lc)

I 111111111X111111 I

rn

co0)

300,000

250,000

200,000

150,000

100,000

0 0 0 0e\I` co

00 c'

Estimated TPH Mass Removed per Quarter Cumulative Volume TPH Removed


Wi14i7ms AR # Page 48 of 87

Site ST012 SVE System Summary

Average TPH mass removal rate continued toincrease Oct thru Dec 2012 as a result of SVE systemimprovements

TPH removed to date 262,200 gallons

Next SVE performance monitoring Feb 2013


Site'ST01#2 GrodiktviaterContainment System

. Existing extraction wells and equipment configured to allowoperation of a modified pump-and-treat system

. LSZ extraction wells targeted for pumping

. Extraction operations began Jan 2012

Operations temporarily suspended Aug 2012 for retrofit;restarted Sept 2012.


Site ST012 Groundwater Containment $y$temLSZ Potentiometric Surface Map

Dec 2012 35 gpm Extraction

snotz-Lszes

ST512-MSYNOSC1 i nn os

ST012-Wriact., tosses

Legend

Groundwater Containment Monitoring WellLocation Screened in the LSZ

Groundwater Extraction Well LocationScreened in the LSZ(Only Pumping Wells Presented)(Extraction Rate = 35 gpm)

Potentiometric Contour Line (ft ems!)- (Dashed Mere Inferred)


Groundwater Flow Direction

Benzene Concentration (5.0 pg/L) in- Groundwater- November 2012

(Dashed Where Inferred)

LSZ Groundwater Capture Zone

Fenceline

ST012 Site Boundary

Notes:

so312-913-2C Monitoring Well Identificationi,es.09 Groundwater Elevation ift -crash

9209 Benzene Concentration ipg/L)

colt_ Microgram per lifter

F The analyze was positively identified but theassociated concentration is an ohlonationabove the detection troll and below thereporting lint

ft canal Feet above mean sea level

gpm Gallons per minute


a 25 50 toe

IMI1 Feet AWorking CopyAnnual 2012

Containment System Status ReportSite ST012 - Former Williams Air Force Base

Mesa, Arizona

ST012 Containment System LSZ FIGURE

Potentiometric Surface Map17 and 18 December 2012 3-8

Job No. SW1110001PM EWDote, 2/11201 3 amec(9Scale: 1" T IOC

Integrity - Service - Excellence 40

Site ST012 Groundwater Containment $y$tem

LSZ Potentiometric Surface Maps2012 Annual Summary

1 1 I aiiA

530124435

d . 362, ,91.27

--- // --- 3701241107

/ 1184.962860.

' \sTolz,mwsiolc \

ST0.12-1.320

17012-L320453012-wi3

4255 , 53612-MWNO1C,1104.37 1

37512-W32,118.5 a

11.

37012-MWNO5C1134 30

31'012-W03

128iI._89t

51,012,MVA0IC 1 ST012-RB-2C1184.561

..s; 069011

5.7012,W031185_32

51-012,W08/118547

ST012-MW1:105Cf1115.22

ST012 -437 ' TO,

20.60.

/'

33012-W131290

51012-Wse718

154 2 79

570124407 /-$1112-803-1C2860 / 4 1184 70,

51-012-111 5201

51131231141..103c

0184'14 570124403

ST11,12-W081154.99

31012-W341183 960 360

ST012-W381163_530.242 7

57012-R5-2C1104.51

-4- 8690

na455' 0 5909

2350

/;'"

1

Extraction Rate - 25 gpm

3 101 2 -41 3 I42901

52012 -Wil

Nit

March 19, 2012

..... -stiiii-iNre 7,./ ...4,... ''' -'.... 118623 ./., 1, .e, ,..- -. 07 C;L

0, 3. , co, % 6. 5,4 / 5,

\ .,,,,-97,012s-ra14,e ot

' 0'550

ST01241W07 31-012,3-.%.ma /

S

Extract= Rate' - 28 gpm

Legend

Groundwater Containment MonitoringWell Location Screened in the LSZ

Groundwater Extraction Well LocationScreened in the LSZ(Only Pumping Wells Presented)

Potentiometric Contour Line (ft amsI)- (Dashed Where Inferred)


-1. Groundwater Flow Direction

Benzene Concentration (5.0 pg(L) in- Groundwater (Dashed Where Inferred)*

LSZ Groundwater Capture Zone

Fenceline

L__ j ST012 Site Boundary

Notes:

June 26, 2012

O

ST012.W391189 530.242

1012-432 ST012-MWN01C

57012-MWNOX4 1181 61t

1187.81 A 1187.054 57012-WOO1136.70.6,

S

ST012,-401 4

57012-1,520.1

570124492

570121AWNO1C11135.51....

3701244011187'21

,57,1a-rO

ST012-W031107_54

ST012-Wo7 51012-R19-1C1800 0155.19

14e

5T012-1SZ03!

ST0126iIWIVOIC11 85.53 53012-W03

1155.44

ST012-44081181 45

ST012-W1104.99

<1.0

ST01 ORB-2C1185_89

H 9200

ST012414W240.590 ST012-W37

1186 42820 ; SI-0124U.,

No Extraction September 14, 2012 ErtracLon Rata' - 35 gpm December 17118, 2012

ST012-RB-2C Monitoring trWil Identilloation1105.89 Groundwater Elevation In ems!)

0200 Benzene Concentration rugfLi

porl. Microgram per liter

F The 07110 was positively identified but Heassociated concentration is an estimation above thedetection liee and below the reporting lank_

arnsl Feet above mean sea level

grit Gallons per minute


Benzene concentrations shown for March, June andSeptember are based on November 2011 data;concentrations shown for December are based onNovember 2912 data.

N0 59 10M) 209


Containment System Status ReportSite ST012 - Former Williams Air Force Base

Mesa, Arizona

ST012 Containment System LSZPotentiometric Surface Map

Quarterly 2012

FIGURE

3-2

Jot No. 9101110001

amed9PM. ESN

Date; 13 0131/2008.1e. 21"a


Site GrotificiviaterContainment System

Extraction activities influence potentiometric surface in LSZ

9.5 million gallons of groundwater extracted and treated fromJan through Dec 2012

181 pounds of benzene removed through Dec 2012


Wilafams AR # Page 53 of 87

Site ST012 Proposed Plan

Draft Amended Proposed Plan submitted Jan 2013 forregulatory review

Public Meeting - Spring 2013

Steam enhanced extraction and enhanced bioremediation isthe Air Force's preferred treatment alternative


Wilarams AR # Page 54 of 87

Site ST012 Path Forward

Pre-Design Investigation - Feb-Mar 2013

. Proposed Plan public meeting - Planned Date April 18 2013

Record of Decision - Summer 2013

. Remedial Design/Remedial Action Work Plan - Fall 2013

Ongoing annual groundwater sampling - Next event Nov 2013

Ongoing SVE performance monitoring and operation ofcontainment system




Site FT002, FireTraining Area

Number 2

2/19/2013 45


Site FT002 Location Map

cece

reWilliams- Field -Rd

Legend

FT002 Boundary

alFormer Williams AFB Boundary

Pecos-Rd

0 0.25 0.5

Miles

Job No. 9101110001PM: EVV

Date: 0512112012Scale: 1-, 0.5 m ile

Thom. 00.1 Mtn Inn Donn cnt.a vnn We ntl 0.0 andfint V/ Mn AMEC Prgti NuotiI 11101110001 Ms rtnpnaboon ce001. ken. W tun tva. And an Uwe

00341.004 wafrarnIOSP and 1.0 NEC 01511,01 WM.*IC or rnOtart rodIJIZIKNOrller a Ann 1101 palt Ot unnkalotl u:0.


FT002 Site Location MapI FIGURE

1-2

ame0



Site FT002 Site Background

Fire protection training activities (1958-1991)

Soil COC: benzene, chloroform, 1,4-dichlorobenzene

No evidence of groundwater impact

OU- 3 ROD 1996; Soil Remedy (bioventing) implemented in 1996-97

Final soil cleanup goals for unrestricted use not achieved

Declaration of Environmental Use Restriction (DEUR) to prohibitresidential use and require soil management below 5 feet


Wilafams AR # Page 58 of 87

Site FT002 Site Update

. Final Soil and Soil Vapor Sampling Work Plan submittedNov 28, 2012

Soil gas survey performed Dec 4, 201210 soil gas samples collected at former Eastern Burn Pit

Soil investigation performed Jan 7-18, 201311 soil borings drilled and sampled to 100 feet bgs at formerburn pits


Wilarams AR # Page 59 of 87

Site FT002 Path Forward

Evaluate soil gas and soil sampling data

If ROD cleanup goals achieved, prepare site closuredocumentation for regulatory review Apr 2013

The goal is achieving regulatory approval forunrestricted site closure by July 2013




Site SS017, OldPesticide/Paint

Shop

2/19/2013 50


Site SS017 Site Location Map

Ray-Rd

WMiams.Fiold.Rd

Rftryh

Legend

SS017 Boundary

1:21 Farmer Williams AFB Boundary

Pecos -Rd

0.25 0.5

Miles

Job NO. 91011112001PM: ESNDate: 0211512012Seale: 1-, 0.5 mile

nal. man Anna, noel. nal base feel:M.0h Pi el. an :ea armtn out wry1111Fc Irynrycl dt,antlar 110 11101101 Putman tat

nct teen .tuned try Idenatal land V.1, ar1 any Nall pert el 1,,

Ana mpt.n atalaniwnrinrarry rem op unneandan,:d


SS017 Site Location MapIFIGURE

1-2

ame0Integrity - Service - Excellence

Wii6_17ms AR # Page 62 of 87

Site SS017 Background

Old pesticide / paint shop

Soil and groundwater COC: Dieldrin

Removal action for soil completed in 2000

Ongoing annual groundwater monitoring (Aug)

Draft OU-6 ROD Mar 2012



Site SS017 Path Forward

Air Force to submit updated soil and groundwater riskevaluation for regulatory review

. Next steps will be based on outcome of soil and groundwaterrisk evaluation

Ongoing annual groundwater monitoring event - Next eventAug 2013




Site LF004, Landfill

2/19/2013 54


Site LF004 Site Location Map

Legend

LF004 Boundary

InFormer Williams AFB Boundary

0 0.25 0.5

Miles

Job No. 9101110001PM: EWDate: 07/1 8/2012Scale: 1", 0.5mile

71,0 tom. ncc Ggen Ernwp 6,1, ro,conshia6 11160,1,6 .116.11.1.GC 1,0100 14-4.4f COM Tux map PanMAMMA C661.0 4, 10.167 1.3. war nd " end Nrt, aim:

(66166.1661666frrtlita .16614n0 A MGC nuht irte %in fluid Web eee fir.


LF004 Site Location MapIFIGURE

1-2



Site LF004 Site Background

LandfillFormer solid waste landfillOperated from 1941 to 1976Closed in 1995 with a permeable soil cap(0U-1 ROD 1994)Rising groundwater tableOngoing semiannual groundwater monitoring

COCs> Dieldrin and beryllium in surface soil> Perchloroethylene (PCE)> Trichloroethylene (TCE)


ISite LF004 GroundiWialer Monitoriri41113dateWell Locations

IL' .4t

fib

t :441gre" alr'-' r. 4-........-,

_ LF01-W32D' t;dp.1 e IF

LPOI.V.25 ''.- ...

4.L.F01.WIS I s.LF.04LW31S

LF0.1,W3.1M.... " 'LFP.I.,..os ... ,o1.1390.,-.........1,01 LUNA

1,111 walr:,

A. 1.F01-1,030

,kr,01-L4035

LF01 W15

1--

1001 -Win

. =01-W14

1,01.W07

1101.W16

1,01-10.116 LF01-1-A065

LF0.14120

1,01.VVOSNI1101 VV17/)

1,01-W095 LF01.W09As

1.F01.1N38D

1001-1N175

1,01.V090

114

LFOIM28.10

FolM28.1)

L.

LFOL_tea

1,01AN205

1,01.W17

LF01-W,10 ,r

if01.W30,5

004-WOOD

LF01-VV3CM

F 6,7

LF0-1.W11F, ;

64,.4...1 PeregeLF01 W2.1 . r LF01W295

LF014724D

. LF01-11,1291,1

LF01.W24M

_ '0.1S

it'74P

"NaiED

Legend

Se Monitoring Wet Location

tB Observation Well Location

LF004 Boundary

Former Williams Air Force Base Boundary

0 100 200 40011 Feel AWorking CopyAnnual 2012

Groundwater Monitoring ReportSite LF004 - Former Williams Air Force Base

Mesa, Arizona

LF004 Monitoring WellLocation Map

FIGURE

2-1

Job No.. 91 0,110001

P" EV,Cale: 21812013

-Sae 1" = 400. amect9

Integrity - Service - Excellence 57

11.k Site LF004 GroundtileiRkonitoriPligHUfpilate4. * Nov 2012 Flow Direction

1114.

Wr f;

.'2r

WI 4

4es

i a i

LF,01-11.s0301107

LF01-L.4035

LF01.W1111.203

LF01-W3., LF014632 '1200 46 1291 02

LF01-W32M1.0 84

LF01-WaOS<1'202

LF01-.14

/9.1

F01,1,7151205.

5F01 -W101204

LF014,16

LF01.W07

LF01.162:11:4 4:

1,.:119501111

LF01.1,0981202

LF0,%I.A06M

2011, 4, 1

FI,11,...,10,5S

LF01 W3.1S

v°;

LF01-W3esM UV-MOD1203.63 1209.23

4 'ALF01-111120

1201.103

LF01-voro

LFIltypIke1199 OS

L001.W310 . -

1199

LE014909 0101-11301011195.94 leg] 15

',LEN MOM1196 44

11l 96.09 .0

1,171IN175

LF01.W116

LF,01 W11F1120' 20

LT,r--ANISisaiiitrardsum

dVIENEMENOMinlisrammia F01,W262045

LF 01,1,1961201n1

6,

LF0.11W1931251.95,

1.FO1 4119261.05

1,01-1,2413Ar2.1111.1

LF0.1-W2406,W195

L.F0741135512,51

1,01-W35M,20101-

LF111497251196 2C

LF0.1.W37M1155.35

LF01.W29M1196 04

as

LF01.1N36S

LF01.1,0601

Legend

44 Monitoring Well Location

Observation Well Location

Potentiometric Contour Line'(Contour Interval = 0.5 ft)

Groundwater Flow Direction withGradient (ft/ft)

rr-; LF004 Boundary

I= Former Williams Air Force Base Boundary

Notes:

LF01-W29M Monitoring Well Identification1196.04 GrOundWEIter Eh:radon (II arm!)

01202.117, Groundwater elevation not used for potontiometnnsurface contour.

Pot¢ritiorretnc 5211000 contours developed fromshallow groundwater monitoring well elevationsonly.

ft Feet

ft amsl Feet above mean sea level

o 100 200 400



Mesa, Arizona

LF004 PotentiometricSurface Map

FIGURE

3-2November 2012

401, No. 910/110001PM. EWDate 2/7,29V_ ameeScala. 1' -400

ORK If spa Maar M. MI RN in.. ea Um einilaa11...........,rad ,fte pr., eraespea....tt7snose.1=1 Art=nmer


Site LF004 Grounciii3terl4onitoriit Itbdate4.1 Nov 2012 Sampling Event

54 wells sampledResults

PCE and TCE only contaminants above EPA MaximumContaminant Levels (MCLs) and Arizona Aquifer WaterQuality Standards (AWQS) = 5 gg/LPCE in LF01-W19 increased in the Nov 2012PCE concentrations exceeded the standards in 17 wells;highest concentration 86 gg/L in LF01-W19 (up from 53gg/L in May 2012).TCE concentrations exceeded the standards in 13 wells;highest concentration 35 gg/L in LF01-W17 (down from 41tg/L in May 2012).


1,Site LF004 Groundtirgerthonitoriiid te4** Nov 2012 TCE Results

1.5111q11:r .

. n

- :C7141325 inisi

'SLF01-WI3e4- .-------'--- -----1,34-13,312Lrel.LAWS

'I' " r.-... 1, LF01-,065"---00.W.200----14 &-s,5i,, - - ar01.9/14 \;-- , SI

12

.-.11 1

0 .,,... 004121

li Pei. a 90 F\

1 0 lo ri, 1,01.1k403S,E 1

Groundwater e. oPF

4-----. Flow Direction .F0141/125

30II(1r'

1

"CF1514NIS ....I

I1 2t L.

LF01.L.110313

i'-' .e- 41.2 U LF01-1.006.-." .k. I 0 "

t \r 1,0141-10 le

LF81-W026

1,31-63,890.

LF01.1Z10913k&-'...

F

fP.:

LF01-.200.6.0

trot -W310

I Groundwater *9.1:F01:WV? ..s,1.801-W17D

" Flow Direction 7.0

LF01r18.240

9041! P r

FF01483312-1611

1_40181.13513

655F

Deep

Vol-WO/0

1.201.18,18 \AIM.

0 311,

LF01 1,0181.;_ 1,313,4/20

LF01.W16 tit181 F.

LF01-1N07 !FOI-WO3M24 F 07 FI-1

6'rj GroundwaterFlow Direction

^ LF7-ISIO;;-Ltp.10181(08,.,..,1 2

431111":11

OSfiF1,0148.3081 .

1,014.31190

LF01,V24M

up

tf:rA.

1,01 992015112:F

LC0141'360

Middle I

Legend

TCE Concentrations (pg/L) in Groundwater


*5-10 143_

10-20 ag/L

20-30 pg./

030 (Aga_

'41/110S/MCL = Spoilt

11111.- Groundwater Flow Direction

IS, Monitoring Well Location

LF004 Boundary

Notes:Lroa-wirra Monitoring Well Identification

20 Maximum TCE Concentration (W/L}(Results that are &Oki:ad and bolded equal orexceed the AWOS MCL of 5 pgIL)

pg/L Microgram per liter

vl Not detected at or above the RL

AWQS Arizona Aouh'er Water Quality StenderdeF The anakyie wee positively identified but the

associated concentration Is en estimation abovethe MDL end below the RL

It ants! Feet above mean sea level

MCL Environmental Protection Agency MaximumContaminant Levels

MDL Method Detection Limit

RL Reporting LimitTCE Tnehloroethene

U The anelyte was analyzed for. but not detected ator above the RL shown

0 200 400 800



Mesa, Arizona

LF004 Depth-Specific Distributionof Trichloroethene (ICE) FIGURE

Concentrations in Groundwater 3-4November 2012

Job No 9101110001019 EVV

Dew- 2/0/2010 maec°Scale. 1" = SOT


Site LF004 GroundtiaterthonitoriPri4Vbdate4.* May & Nov 2012 TCE Results

Shallow Groundwater Zone

May 2012

.1. 6-

..p-LF01-W325,1.0 t.I-.

.

-

LF0 -LACT35I.:F. C7T't---N15

L F01 -W13 . - 3 -

--,LF01 W14as,

LF1-wiso :1

Gro ndwaterFlowDiroction

LF W21

4,

LF01-11495D1 - " F

LF01 _,ACLF.01,-2VVZ0 S1

LF11-14/1 TSf7

LF01-W3OS6.2

L F0.1

3M....M. L F01 -1,..29S

LF1-W365Q

'11444, Shallow

November 2012

V r `7,/- "'PI

, t ....5'LF01-LAD3S

LF0144315,,-...,-1-1.0 .J

1:iF01-,A1211.F01-1-.4065---1-F01-W205----------.114,11,-I } 5 , 12 , '4'0 '4.

LF014111-4 \1V V . 0 96 F

,ffir 7%

LIF01-VV3OS

A... S.fi

L 01 -W3753 7

Flowtian "arGr

L F 01 ;17;oundterwa -. 028 F,

10 LF01 W11R

""7111.1=111111.1411111110r16-..,......721..10.111..s..LF01-41/28 - LF01,W105

..."..m_7.,-..16..

LF01=W358..<1 0

L.F01 W24L F01-W293

is

Shallow

LegendTGE Concentrations (pg/L) in Groundwater M4111' Groundwater Flaw Direction(Dashed Where Inferred) *AwaSima= 5 pgIL

1 *5-10 pg/L 1 20-30 pg/L Monitoring Well Location

30 pg/L ill-7 LP:104 BoundaryI

10-20 pg/L


Site LF004 Groundwater- lVlonitoring'UpdateMay and Nov 2012 TCE ResultsMiddle Groundwater Zone

May 2012

1'.*

."` r LF01.14180 /q F LV LA 06 RI

11."' LF09 W1611 F.fiF

1FLt9tiO7LF01-W09rd

.0.55 F 5,

9

LF 01 40/20LF101-W32611.4

I V-, Groundwater

Flow Direction111110

0701 W03 LH:1-77./28W,:1 20 1 3 -

L F01-16117"41

ti

'11LF01111/3106

LF01-1M113011.1

4 4 F

Lrol.wzam6./

L.F01-1/4/35M0 F

LF01.N3Ehlfl U

LF01-40/37M3

S

LF 01-41/29M0.10

Middle

November 2012

47 2-

-LF01-1A1180 15 F LF01-LAC6M L601=511/20

LF0I.,N16 13 8.1 4'0 8, F.

FOI,'WO7 LF01IND4A1' ' 351.14:. 4 0

0 t

.

OrLF01-41,32M _ e -

03: Fl_F01-41/3.1011

vit ,,,o/of =iv

j Groundwaterr-- Flow

1.

LF01-W11M20

20

LF01-W37M5F3

LFoi-vilsom42i

10. 01-11428141

itialiV.:17V....0.8grow -

LF01/1/19z 10

5

it LF01-1/035M0.70 F

LF01-W28/V10.21 F

001.11024M5.7 -1 I-ma-

I_Fai-vgaw<1.0.0

Middle

LegendTCE Concentrations (pg/L) in Groundwater(Dashed Mere Inferred) *AwaSimeL= 5 pg&

*5-10 pg/L 1-1 20-30 pg/I_

I 10-20 pg/L I pg/L

mIIIIP Groundwater Flaw Direction

Monitoring Well Location

P-z LF0O4 Boundary


Site LF004 Groundwater- lVlonitoring'UpdateMay and Nov 2012 TCE ResultsDeep Groundwater Zone

May 2012

i

Ground Waterr ----- Flow Direction

LF4:11-LAM2o4: "u4

LF01-0/100.83E

LF01-0/32D.3.25

fi

LF111-LADF

LF01-YV2dEl

LF01-4M1,31 D

iF01W09A

LFD1 W1713L F.0144090

.19LFCt144110

I 9

L.F01 -W15 D2.3

ir1-F61:W2.80

D.35 F

LF01-W3OD,1 tl

LH] YVZ4D

LF01-W351).0.39 F

November 2012

LegendTGE Concentrations (pg/L) in Groundwater 110111, Groundwater Flow Direction(Dashed Where Inferred) *AwQMACL = 5pgii

Monitoring Well LocationI *5-10 igfL 1-1 20-30 ig /L

10-20 Jg1L 30 pg/L -±1 LF004 Boundary


Site LF004 GroundWaleiVonitoriPri4bhdate-42* Nov 2012 PCE Results

.. ' 4 f ...J .1.

.1 ' ,i, i1: . ,11. .411' , j a

ILL'IP. / e

LF01.151325

- 0.0 F

2601-74036 F01711315LFOI.W13 ...-, 1 0L1, ,...--' . % L461135066 5.--LF 01 11102.03i. I 2F131-W21 10 05, 762,1.141 3 \t., LF21.W37020. ;/.

0601411/175 LF01.W305 0 ....I LF.31-1/3139S 52 .4 1.5

4-46,111-W15.4. 0 3...L. 7,01,,...

Groundwater LF01.W111.,0_62 F-- -- Flow Direction

rEmEMEMillille ......1.0

Legend

PCE Concentrations (pg/L) in Groundwater


I I *SAO tigiL

I I 10-20 pull_

I I 20-30 pglL

1 a30 pgit

rtOW05/MCL a- 5 pgL

)110. Groundwater Flow Direction

St Monitoring Well Location

rE,.....; LF004 Boundary

Notes:LF04401M Monitoring Well Identiftcation

9.5 Maximum PCE GOOnen11,9011 (pot)(Results that are italiCized and bolded equal Or.0.0001 the AWQSMCL of 5 pg/L)

pgIL Microgram per liter

<1 Not detected at or above the RL

AWOS Arizona Aquifer Wider Duality StandardsF The analyte was positively identified 1)1.1t the

associated concentration is an estimation abovethe MDL and below the RL

tt ernsl Feel above mean sea level

MCL Environmental Protection Agency MaximumContentment Levels

MDL Method Detection Limit

RL Reporting Line!

PCE Perchtoroethene

U The anaryte was analyzed for, but not detected ator above the RL shown

N0 200 400 500I1 Feet A

r. .--tr v

r "...PI-,- ,1 Jr, --, 2- -. .7 ... -. , i 1_.

../ ''-sl ., .. ,./ -'' ..., Or .1- -'1::

1$01-403251 7

L701.W1(1.0 30 7 2,7,0616 _......./'-'----- 1 0731.W.3151,..-

+-'. ' 2.401A520 .6.----7---- '-'2 2F51W16 - 6.0

.-2I 075F .c.0601.31/17121

1,11W07'2\ LF01-W17 LF01-W366.1 0 30 F

31 4 . 2 51.-1'3 'Y..- 2F31-2561510

I 4" 9.5GroundwaterFlow DirectionJIIIII

LF111412413 1,01-2142611116.457:1:1;_=6.23_27..73.1M - LF01..W19 30 134 86 °9'L601;5606

5 31 F__/_2 0...----TO

i -LF01 -W1eS 1,01-W20

... - 1,131-W2SA' 4 14 17 6.2

3r,-".--72 30 F.......-

',, LF0t-W35S 10al 11-LF,01-W365,1LF014535M

5

LF01-W3651.:1 CU

Li Shallow =' '-'''. --t-7A-J i-i

Middle,4. r i;,,, -eL----43

4 NIf ,..

i, oe-, 'i / --,- . , . ,

1 . 3 ,

t ,IPir

... i , .. or. - "ri a . . ' . *

i - - ' i" I. '-- . :I ::, ...-

-

r ' - 1.601-LAO3D .LF51:241.06 1_601-1,111131..--1. ,1021 51.- - : e,r 3n - LF31 -W203

2F01-4610 43s ,,,

. \ 27211.W09A1.3

LF01.W17,23' LF01-W3OD

't. '' -- Fj 11,

2F01-W1121 ' 2,Groundwater L'".5..;'9° . a, 1 7

.--- Fiow Direction

11110.76014/19D

... -"' 1-7 LTF 1 .W2a--P- - - 6.6 2721.3420D

2 ,8 F .ge ..1.,/, .5

5 LF31-W3537

'", "

'

eherE5'7.----- .-

111

AligilL.117.47,17115

-

.'-311;;°.1"

'''',

.---.

-....

616476 0731 - 1029 5.6333

51We 3.1611.2076 arne0

wap 6197756 ft os6



Mesa, Arizona

.1.6-571*.>

p ___

LF004 Depth Specific Distributionof Perchloroethene (PCE)

Concentrations in GroundwaterNovember 2012

FIGURE

3.8

.kob, No_ 1300,1110.031

amec°Mete: 2fat201350.8166 l'1=13001

--1..n==..-r....7:372% "'-Deep


Site LF004 GroundWitei-RA4' onitoriPri47Ubd ateMay and Nov 2012 PCE Results

Shallow Groundwater Zone

May 2012

-( 144

L101 -4413 LF.01-LAO3S1 U 0 U-44

LF01-W14-4 6 t., LF01 W21

LF.01-LAKS

4:001W32S

$ LF01W2OS 47'

6.9

LH4I-V/31S

L F01 -W375o F

--- 4e,LF01-W29

VW 0 F'

L F61 N3650

Shallow

November 2012

LLF01-W13. F 01 LAO3S

<1 U

LF 01-W211 3LF01-V414,LJ

LF,..0149053LF01-1.4/15

G ratindwat rr----- Flow Direction1/0.

0.35Fglos.

LF01-12A06S. 5.--LF01-1N20910 7.8

0 36 F

LF01-4417352

Lf 01-1N375o r

10

LF01-W19554

LF01-9924LF -'114 29S

5.2

s,LF01-41136S

LF01-W36.0<1 0 U

"AL--a-

Shallow

LegendPCE Concentrations (4/L) in Groundwater(Dashed Where Inferred) AWQVARCL = 5 pg.d_

L *5-10 ig /L ' 20-30 pg/L

10-20 pg/L z30 pg/1_

Groundwater Flow Direction

le Monitoring Well Location

P-7 LF004 Boundary


Site LF004 Groundwater- lVlonitoring'OpdateMay and Nov 2012 PCE ResultsMiddle Groundwater Zone

May 2012

L 01-W08

'LF1:11.W19

0 29 F.

LF01-Wle0 7-1 F

L FOi -W07

GrollndwatcrFlow Dirot:tion

rli701W32M5-

'LP.0.1-LADBM

L F -mism

r

I a

1.1

LF014120 4

71v

, A6

LF014417 LF014/5/501M

01-0 93 2.0

LF01ANO1M3357

LF91-W2SM1

IF01-1,435M8.7

iFo-r-AmmnJ

11F01.-Wi9r604 1

Middle

November 2012

LF01-LA0fiM

7?,4

1..F011-rie07 LF01-44/09M

r""Y3 ,!ri.1

7

GroundwaterFlow Direction

LF61-4V32M

'4 1 ' i- a,''' I.Fo1..061M

ILF01-11420 '!nit----r 71

r.1 r

t / 4T-id4

-

6.4

LF0144117

11 5;m

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LF01.W3OM 03374 2 C or-..

' - b_ 4_ -Sr

w, . A.

LF01 -0/24M1..F01-W19 3086

1020

LE111-0i29M009F

1...F011&35M5.2

LF01-W36M

I Middle

LegendPCE Concentrations (pgIL) in Groundwater 11111. Groundwater Flow Direction(Dashed Where Inferred) Awasrma = 5 pg/f_

*5-10 pg/L 20-30 pg/L Monitoring Well Location

10-20 pgIL 1 a30 IJgIL ;LF004 Boundary


Site LF004 Groundwater- lVlonitoring'UpdateMay and Nov 2012 PCE ResultsDeep Groundwater Zone

May 2012

r.

r ATI' ,!.401-

!Fat- LA.03D<1 U

le"

LF 91-VV10LF01-14'09A

5LF01 -W1710

- 35L F01-W.D9 D

4I 01:F01-W11

21.

GroundwaterPlow Direction

LF 01-W32D1

Ar,L FOl LA 06

G

J.;

LF014/3105.5

L FO/ -.MOD<1 aU

4.41

. 111M

'bar C, GO -

LF01-W190YY-

" kL:

LF01:W751:114

Fper,

Deep

1

November 2012

f:'4 f r.,? 1

.. \ /,

/t ,. ,

, -ii, .,,,,a I.LF.01-410 leXLF01-LA03O

<1.'.'

LFD1-4410.5

GLFO,13.4D

GroundwaterFlow Direction

TAT2

0 68 F

1111111,-

LH:11 -W221)1 2

L.Fal 063 9 - LFD1.W200

LF 01 -VVO9A19

L

LF01.'0176'? 7

LF01-0/11D".".. - 1 .

s.5

I

LFP1-W3.0D'.1 D U

LF01-15550

I

LEVI -4V24D

LegendPCE Concentrations (pg/L) in Groundwater 11111. Groundwater Flow Direction(Dashed Where Inferred) 'AwQviwct_ = 5 pgd_

771 *5-1° PO- 20-30 PO-Monitoring Well Location

LF004 Boundaryr -10-20 pg/L 3t) pg/L


Wil6iams AR # Site LFOO4Nov 2012 Summary

Groundwater results indicate historically decreasingconcentrations of TCE and PCE in hot spot areas;however, PCE in LF01-W19 increased in the Nov2012 event.

TCE and PCE plumes are stable and adequatelydefined

Next groundwater sampling event May 2013


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Site LF004 Path Forward

Draft Final Focused Feasibility Study underregulatory reviewProposed Plan public meeting Planned Date May14, 2013

Record of Decision- Summer 2013Remedial Design / Remedial Action Work Plan-Fall 2013

Ongoing semi-annual groundwater monitoringNext event in May 2013Continue landfill maintenance




Contracting Updates

Presented by:Ms. Catherine Jerrard

AFCEC

WilElYams AR #

Munitions Response Site XPLaJg4033ofA8r7ea 1

Final Munitions Response Action

Contract Award scheduled for Feb 2013

Work Plan Submittals and Approvals Mar-Jun 2013

Field Work Begins July 2013Munitions Removal ActionEnvironmental SamplingDebris Disposal

Completion Reports 2013-2014




Meeting Wrap-Up

Presented by:Mr. Len Fuchs/ Ms. Catherine Jerrard

RAB Community Co-Chairsand Scott Johnston

2/19/2013

WilAizms AR # Page 85 of 87

Meeting Wrap-Up

Review action items

Call for agenda items for next RAB meeting

ST012 Proposed Plan public meeting Planned DateApril 18, 2013

LF004 Proposed Plan public meeting / RAB meeting(Proposed date May 14, 2013)

Meeting adjourned




Meeting Adjourned

2/19/2013

FINAL PAGE

ADMINISTRATIVE RECORD

FINAL PAGE

Documents

Williams AR # 1617 Page 1 of 87€¦ · Williams AR # 1617 Page 6 of 87 months of operation with the modified system, AMEC will evaluate the results. By the end of 2013 AMEC plans