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Accession #: Dl95061607

Document #: SD-WM-RPT-178

TitlelDesc:

VAPOR SAMPLING SYSTEM VAPOR & GAS SAMPLING OF SSTA 241 -SX-102 USING THE

Pages: 39

Document t i t l e :

Approved by:

Approved by:

Approved by:

WHC-SD-UM-RPT-178, Rev. 0

APPROVALS

Vapor and Gas Sampling o f Single-Shell Tank 241-SX-102 Using the Vapor Sampling System

Sc ien t is t

Sampl ing and Mobile Laboratories

/ 7 o c m s - R. 0. Mahon, Project Lead Date Vapor Sampling Pro ject Sampling and Mobile Laboratories

/ 0 - 2 3 - B 0. L. Edwards, Technical Lead Date Vapor Sampling Pro ject Sampling and Mobile Laboratories

CG I COC DOT GC GC/FIO 6EA HEPA 4 NO2

obc Fd OW PNL M L SST TCP team TOC TST vss WHC

WHC-SD-WH-RPT-178, Rev. 0

LIST OF TERM

I

Combustible Gas Ind ica tor Chain O f Custody U.S. Department o f Transportation Gas Chromatograph Gas ChroutogrWh/Flune Ion iza t ion Detector Gama Energy Analysis High-Eff iciency Par t i cu la te A i r ( f i l t e r ) h o n i a Nitrogen Dioxide N i t r i c Oxide Water Vapor O f f s i t e Property Control Organic Vapor Meter P a d f i c Northwest Laboratory Sanpl i ng and Mobile Laboratories Single-Shell Tank Tank Characterization Plan SML Vapor Team Total Organic Carbon T r i p l e Sorbent Trap Vapor Sampling System Westinghouse Hanford Company

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WHC-SD-WM-RPT-178, Rev. 0

VAPOR AlsD 6AS SAIIPLIW OF SIHGLE-SHELL TAW 241-SX-102 USIWC THE VAPOR SMPLIWC SYSTU

1.0 SCOPE

The Vapor Issue Resolution Program tasked the Sampling and Mobile Laboratories (ML) t o c o l l e c t representative headspace samples from Hanford S i t e single-shel l tank (SST) 241-SX-102. This document presents sampling data resu l t i ng from the Ju ly 19, 1995 sampling o f SST 241-SX-102. Analy t ica l resu l t s w i l l be presented i n separate repor ts issued by the laborator ies t h a t supplied and analyzed the sampling media.

2.0 SMPLIWC EQuIPlrENT DESCRIPTION

2.1 VAPOR SMPLING SYSTU

The SML vapor team (the team) used the vapor sampling system (VSS) t o c o l l e c t representative samples o f the a i r , gases, and vapors from the headspace o f SST 241-SX-102 on Ju ly 19, 1995. Mahon e t a l . (1994) describes i n d e t a i l the VSS, i t s performance, and i t s operation. The team used the VSS t o c o l l e c t sorbent t rap and SUmA canis ter headspace sacples from SST 241-SX-102. The team then sent these samples t o the analy t ica l laborator ies f o r analysis.

The VSS comprises a mobile laboratory, a hot-water-jacketed stainless-steel probe t h a t i s inserted i n t o the tank headspace, and stainless-steel t rans fer tubing t h a t connects the mobile laboratory t o the probe. A vacuum pump draws sample vapor from the tank headspace and through a l l t rans fer tubing and the sampling manifold. E l e c t r i c a l l y activated, pneumatically actuated, valves d i r e c t sample f low w i th in the VSS. laboratory monitors and contro ls system temperature, monitors absolute and d i f fe ren t ia l system pressure, meters and contro ls vapor mass flow, and monitors sample vapor t o t a l organic carbon (TOC) content using a gas chromatograph/flame ion iza t ion detector (GC/FID).

A key feature o f the VSS i s i t s use o f heated t rans fer tubing and a heated sampling manifold. Maintaining the system temperature a t an e lec t ron i ca l l y cont ro l led, elevated temperature prevents vapor condensation and reduces vapor adsorption on surfaces exposed t o sample vapor. Hahon e t a l . (1994) describes various tes ts and observations tha t ind icate the VSS sample t rans fer e f f i c i ency i s cons is tent ly high.

Instrumentation housed i n the mobile

'glclv, i s registered trdmmrk of Holrtr ism, Ins. , C t m l u d , Ohio.

1

WHC-SD-UM-RPT-178, Rev. 0

Typica l ly X Change from Control valve (stdc 647 t o Actual F1 ow-indi c a t i ng

1 200 -0.7 2 200 0.05 3 200 -0.45 4 200 0.05

usedRflow X Change from Datal ogger t o Actual

-0.85 -0.10 -0.60 -0.10

5 6 7 8 9 10 11

The VSS i s also equipped w i th a gas chromatograph (GC). The Hewlett Packard 5890 Series I 1 GC i s equipped w i th a f lame-ionization detector sample loop, a 10 p o r t i n j e c t i o n valve, a 2 meter chromatograph c co1urnny2a programable oven, and a portable computer loaded w i t h the HP-Chemstation

IFID), a mL

200 0.55 0.35 200 0.25 0.05 200 0.4 0.20 200 0.25 -1.81 50 -0.128 -0.27

200 -1.1 -1.20 5000 0.332 0.17

ZHP-Chmmtetion i s r w i a t e r d t r .dnrrk of the Wwlett P.elurd Eolpm, Avmd.10, P . m y I m l m .

WHC-SD-WW-RPT-178. Rev. 0

3.2 OPERATIONS AND SAIIPLING PERSONNEL

Steve Carter was the Tank Farm Operations person-in-charge. The other SML vapor team members included:

G. S. Capiio, VSS Technician T. 8. Utecht, VSS Technician R. A. Westberg, F ie ld Sc ient is t .

The VSS was set up a t SST 241-SX-102 on July 18, 1995 and was allowad t o warm up overnight. Sampling began shor t l y a f t e r 7:30 a.m. on July 19, 1995, and was completed by 11:OO a.m. the s a w day.

3.3 IWWSTRIAL HYGIENE FIELD RESULTS

Before hooking up t o SST 241-SX-102, an i ndus t r i a l hygiene technic ian f i e l d tested tank vapors. The technician purged the vapor probe srnple tube f o r 5 minutes and then f i e l d measured vapor stream contents using a co lbus t ib le gas ind ica tor ( C G I ) and an organic vapor meter (OVM). The measurements were verba l l y reported, LEL Ox, NH, 0 ppm, 0, 21%. and TOC 0 ppm.

3.4 AMBIENT CONDITIONS

The weather the day o f the sampling event, Ju ly 19. 1995 was sunny and warm w i th a l i g h t breeze from the northwest. Graphs o f ambient temperatures and pressures taken a t the Hanford Meteorological Station, which i s about 2.5 mi les northeast o f SX-Farm, are provided i n Appendix B.

3.5 SAMPLE COLLECTION

The hot-water-jacketed sampling probe was located i n Riser R2 o f SST 241-SX-102. The probe length, from the sample i n l e t t o the top o f the r i s e r flange, was 7.3 meters.

A l l zones o f the VSS were heated t o 60 O C dur ing setup o f the VSS a t SST 241-SX-102 on Ju ly 18, 1995. The team s tab i l i zed the VSS temperature zones by 7:30 a.m. on Ju ly 19, 1995, and the system was ready t o c o l l e c t samples. Measured according t o the VSS operating procedure, the pressure and temperature o f SST 241-SX-102 were 988 mbar (741.0 t o r r ) and 35.3 OC,

respect ively. The sample l o g sheets i n Appendix A provide a complete chronology o f the sample event inc lud ing s t a r t and end times, f low rates, volumes, and spec i f i c sample i d e n t i f i e r s .

Approximately 20 hours before the f i r s t samples were col lected, the team began heating the VSS t rans fer tubing and sampling manifold. During t h i s wamup period, the team began a purge o f a l l vapor t rans fer tubing and the sampling manifold w i th ambient aix. Before sampling tank vapors on Ju l y 19, 1995, the team col lected two SUMMA canister samples o f ambient a i r , one manually 10 meters upwind o f the VSS connection w i th SST 241-SX-102, and the other

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WHC-SD-WM-RPT-178, Rev. 0

From the time t h a t samples are received by SWL u n t i l they are shipped back t o the analy t ica l laboratory, a l l COCs are maintained by SClL i n accordance w i t h WHC-IP-1127-1.3, Chain-of-Custody/Sprial Analysis R

sampling event are included i n Appendix C.

est for RCRA and CERCLA Protocol Smples (WHC 1995a). Copies o f the complete '8" COC forms f o r t h i s

5.0 QUALITY ASSURAWCE At0 CONTROLS

5.1 VAPOR SAIIPLIWG SYSTEM CLEANIHG

Inmediately p r i o r t o sampling o f SST 241-SX-102, the VSS u n i f o l d and vapor sample t rans fer tubing was heated t o 60 'C and ambient a i r was purged through the system f o r 20.5 hours. Also, a l l per t inen t system valves were actuated t o release any contaminants tha t may have co l lected i n the VSS valves themselves. A f te r t h i s purge an ambient a i r sample was drawn through the VSS manifold and a GC/FID run was i n i t i a t e d . No s ign i f i can t l eve l o f contaminants was detected. A second ambient a i r GC/FID run confirmed t h a t the VSS manifold and t rans le r tubing was f ree o f organic remnant residue down t o ambient leve ls . A S U W canis ter ambient a i r sample was then co l lected t o c o n f i m by laboratory analysis t h a t the VSS sampling manifold was f ree o f t race organic contaminants (or t o determine which contaminants were present and a t what concentration), as discussed i n Section 3.5. WHC-IP-1127-4.10 (WHC 1995b) and the pro ject -speci f ic f i l e located w i t h SHL.

I n compliance w i th LO-080-405/AO, Vapor Space Probe Cleaning Procedure (WHC 1993) the team cleaned the hot-water-jacketed probe before i t was i n s t a l l e d i n SST 241-SX-102. This procedure requires a solvent r i n s e o f a l l i n te rna l probe surfaces w i th acetone and methanol t o c lear the sample l i n e o f possible contamination remaining from the construct ion process. The probes are then heated t o 90 "C, and dry a i r i s passed through the probe t o evaporate the solvents. Before the probes are released, the team ensures by a hand-held organic vapor meter t h a t the t o t a l organic concentration i n the sample l i n e i s below 1 ppmv.

For fu r the r deta i ls , r e f e r t o Appendix E o f

5.2 INSTRUMENT CALIBRATION

Instruments located i n the VSS are ca l ib ra ted on an annual basis a t the WHC Standards Laboratory. VSS instrumentation ca l i b ra t i on data, maintained i n f i l e s by SML, are summarized i n Table 5. According t o the ca l i b ra t i on schedule shown i n Table 5, a l l instrumentation was w i t h i n i t s ca l i b ra t i on per iod dur ing the SST 241-SX-102 sampling event.

WHC-SD-WM-RPT-178. Rev. 0

Table 5. Cal ibrat ion Data.

5.3 BLANK SAMPLES

T r i p blanks are samples t h a t accompany the sample media from the po in t o f generation through sample analysis. They are transported t o the f i e l d w i t h the sample co l l ec t i on media but remain unopened dur ing the sampling event. Analysis o f t r i p blanks i s used t o assess cross-contamination o f sample media dur ing f i e l d t ransport and storage.

F i e l d blanks are sampling devices s im i la r t o t r i p blanks. They are prepared and handled i n the same manner as the sampling media, but no tank vapors are d ram through them.

Spiked blanks are prepared as regular sampling media but also contain a known amount o f special analyte. Tank vapors are d r a m through these blanks and

WHC-SD-WH-RPT-178. Rev. 0

they are handled and analyzed j u s t l i k e any other sample. Analysis of the spiked blanks i s used t o evaluate po ten t ia l sample loss dur ing shipment o r storage.

Ambient blanks are samples o f ambient a i r co l lected a t the suppling locat ion. Analysis o f ambient blanks i s used t o assess contamination t h a t my be present i n the atmosphere o r i n the t rans fer tubing o r sampling manifold o f the VSS i m e d i a t e l y p r i o r t o sampling operations.

Table 4 l i s t s sample blanks used dur ing the sampling o f SST 241-SX-102.

6.0 AmmALIES

A l l samples were co l lected i n accordance w i th the Tank Characterization Plan (TCP) and WHC-IP-1127-4.10, Collectfon o f Paral le l Sorbent Tube a d SUEluA Canfster Samples Usfng the Vapor Samplfng Systan (1995b).

TST sample numbers S5046-A06.551 and S5046-A07.552 were broken whi le removing them from the sorbent stat ion. The samples were co l lected before they were broken.

It also appears tha t the rad ia t ion resu l t s acquired from 222-S laboratory were inconsistent w i th the resu l t s o f other VSS sampling events. fu r thes t upstream HEPA f i l t e r sample w i l l contain the greatest mount o f Alpha, Beta, and Gama rad ia t ion as compared t o the three other downstream HEPA f i l t e r . downstream HEPA f i l t e r contained the highest concentration o f rad iat ion.

H i s t o r i c a l l y the

The sample analysis f o r t h i s event indicated t h a t the fu r thes t

11

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10-27 1028 S5046- A21.556 TST8556 1 TST FIELD BLANK 81 1 0 2 7 1028 S5046- A22.557 TST8657 2 TST FIELD BLANK 82

S6046- A25.03T 03T 5 3/Nox/H20 FIuDBLANK81 10:40 1041 S 5 W A26. M T 04T 6 3 ~ 2 0 M L D B U N K 8 2 le40 10:41 S5046- A27.05T 05T 7 3INOxM2OflUDBLANK83 1 040 1041

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4 TOTAL TANK GAS USED Wwmj SAMPLING RUNS b I UI

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_ - . S5046- A29.OD1 T-2206 I 222Sl Downsram HEPAIbox)

S5046 A30.OU2 T-2207 I 222s)

S5046- A31.0D2 T-2208 1222s) Downstream HEF'A N S S ) 4 P Upstream HEPANSS)

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Trip Banks ID0 NOT MPOSEl S5046- A23.558 TST1558 TST TRIP 81

S5046- A24.559 TST8559 TST TRIP 12

+. Tubes designated with an asterisk were broken while removing.

~. . . . . . ~ . . . . ~.

sx-102 TOTAL TANK VAPOR USED

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SXlO2.XLS 7/28/95 8:03 AM 4 OF 5

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APPENDIX B

AMBIENT CONDITIONS

B- 1

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