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DP16 Depth 2' CAM 17 DP17 Tin Cyanide Depth 2' DP10 — -__—----- - Ammonia CAM 17 Depth 2' Depth 5' Tin Copper P Cyanide Silver CAM 17 Ammonia DP2 Tin Lead I VOCs PHOS Depth 2' Tin Depth 10• $B1 WTA-06 Copper Cyanide CAM 17 Depth 6' Depth 5' Depth F.N. Silver Ammonia Tin CAM 17 Copper Cadmium ND Lead Cyanide Tin Silver I Chromium 39 Nickel Depth 5' Lead Ammonia Cyanide Copper 30 Tin DP11 Silver p�r VOCs VOCsna Tin SB2 SB3 Lead 7.o DPI SVOCS Lead Groundwater Depth Mercury 0.5150 Depth 2' TRPH DPI Depth 2' Depth 9' Depth 10' Depth 6' P 6' Nickel 38 Nickel CAM 17 Depth 2' Copper Tin Tin Copper Co per Copper Copper Zinc 48 CAM 17 Depth 5' Copper DP13 Silver Depth 10' Cyanide Silver Silver Silver Silver CyanideeaLead VOCs ND Cyanide ND Tin Copper P Lead Lead Silver Silver Depth 2' LBaE Ammonia Lead Nickel Ammonia Nickel �PP� Nickel Nickel Lead Lead CAM 17 Silver PSA-19 VOCs Nickel Tin Tin Tin Nickel Nickel Tm Tin Depth 5' Tin Lead Depm F.N. Cyanide Tin Depth 5' SVOCS cyanide Depth s• Tin DP21 Cyanide pH r Nickel Copper 9.8 �PhS 2 Ammonia Ammonia CAM 17 SVOCS Depth 2'2' Cowper Ammonia Ammonia Dem 2- Cyanide Tin Depth 12' VOCs Ammonia Depth 5' SilverTin EGBE Cyanide CAM 17 SVOCS Cy Depth 9' Lead EGBE CAM 17 SVOCS CAM 17 Lead �DPar Cyanide CAM 17 Nickel Ammonia PSA-24 Tin Y VOCs DP3 Tin Tin Nickel Silver Groundwater CAM 17 Tin Tin H DP22 Depth 5' Cyanide Tin Groundwater Depm F.N- Leetl Cyanide Ammonia Tin TRPH Depth 2' P Ammonia CAM 17 VOCs Cyanide Cyanide VOCs Depth 10' CAM 17 Depth 5' Depth 2' CAM 17 Ammonia Cyanide CAM 17 Copper_ --27- "tel VOCs Tin SVOCS Ammonia SVOCS Copper Tin VOCs Ammonia Tin Tin Depth 12' VOCEAmmoDepth S Depth 10 CoPPer Tin Copper Silver SVOCs C anile Groundwater Cyanide Y Silver Cyanide Silver EGOE Depth 10• PSA-17 Depth 5' Amnwnia Ammonia SVOCs Copper SVOCS Lead VOCs Depth 10• Copper DepN F.N. CAM 17 CAM 17 CAM 17 CAM 17 Leatl Ammonia Lead VOCs Tin Silver Depth 12' Tin Tin Nidkel DH Nickel Nickel SVOCS Silver Tin Tin Coppe` Lead SVOCs Copper 10 Cyanide Cyanide Lead CAM 17 VOCs Cyanide Tin Depth 5' Tm Cyanide Depth 10' Silver Ammonia SVOCs Ammonia Cyanide Y Lead Nickel Ammonia VOCs Tin Tin Groundwater EGBE Ammonia Ammonia Copper Cyanide Depth 10 Groundwater N Ciel Tin Silver Depth 10' SVOCS Gmuntlwaler y DPeI Depth 10' Depth 10' Depth 5' Lead Tin Groundwater P$A-14 Copper CAM 17 PPe CAM 17 CoPPer PSA-04 Amrtgne Co r CAM 17 Silver Nickel Groundwater CAM 17 PSA-13 Depth F.N. Silver Tin Grountlwater Silver Tin Lead Copper Tin Depth F.N. CAM 17 Tin Depth F N. Lead Cyanide Nickel T^ Silver Silver Leatl Cyanide Cyanide Nckel Ammonia Tin Cyanide Leatl Lead Cyanide Copper 180 Tin Cyanide Copper 17 Copper 9.3 Nickel Ammonia Ammonia Tin VOCs Cyanide Ammonia Nickel Nickel Ammonia Lead 120 Ammonia VOCs ND Tin VOCs VOCs VOCs Tin T'^ Nickel 7,1 Cyanide VOCs Cyanide SVOCS Ammonia Groundwater SVOCS Groundwater SVOCs SVOCS Ammonia TDS VOCs Depth 10• lk VOCs - Copper Copper SVOCs Silver Silver PSA-12 - Lead PSB-02 WTA-01 WTA-03 WTA-04 WTA-05 CSA-09 CSA-04 Lead Depth F N- _ Nickel Depth F.N. Depth F.N. Depth 7' Depth 7' Depth F.N. Depth F.N. Concrete Nickel Copper 210 Tin Copper 160 Copper 82 Copper 85 Copper 24 Copper 29 Copper 30 Copper 56 Tin Cyanide Leatl 100 Lead 9.0 Leed 6.0 Lead 5.1 Leatl 7.1 Lead 10 Lead 8.9 CyanideCSA-06 Ammonia Nickel 13 Nickel 20 Nickel 39 Nickel 33 Nickel 28 Nickel 33 Nickel 21 Amnioma Concrete Copper 110 D Depth - CSA-12 CSA-10 Leatl 9.9 Depth r DP8 PSA-23 CAM 17 Depth 2 Tin copper cocrlrete PSA-08 PSA-07 Silver Copper 400 Lead NickelPSA-11 TRENCH ~ f-- DP26 Tin SUMP SUMP Depth 2' Cyanide Depth F.N- - - CSA-08 Ammonia copper 8.2 CHEMICAL CAM 17 ® Depth F.N. STORAGE Tin Depth 5• 46 STORAGE cropper 47 CAM 17 PSA-09 � CSA-07 Lead 20 BAYS Depth s CAM 17 Tin Depth F.N. SUMP Zd n Depth FN. VOCs ND Tin Nickel 40 vocs Copper 71 PLATING SHOP A VOCs svocs DePlh 10' I _ WTA-02 Peer 1 Copper PSA-25 _ _♦ De$B 1 F.N. Depth 5' Copper Leel 10 Nickel 78 l 34 CSA-11 CSA-05 Silver Concrete -- Ccpper 69 WASTE TREATMENT Concrete Copper 26 Copper 250 Lead Copper 37 _ PSA-20 "Ciel 38 Nickel 37 F---------- --- FORMER WATER Lead 12 Nickel Tin -- Depth F-N. I TANKS Nickel 99 cyamaePSA-10 Copper 2y0 I (REMOVED) Ammonia Depm F.N. PSA-02 PSA-03 PSA-15 DP27 Groundwater Copper 12 1 Daplh F.N. Depth F.N. P$A-21 Deem F.". PSA-06 I I O CSA-03 SB5 Depth 2' lk Copper 5501CAM 17 . Lead 7.9 DePlh F.N. ISANickel 32 Copper 180 FDepm 8'DBDth F.N. PSA-16 I I \ pH 10.1 Copper Copper 8t Depth F.N. Nickel Cpppar 5g OTH-03 L J / silver Lead PLATING Depth 4- Tin SHOP B copper 39 1 SUMP Cyanide Lead 9.5 40 SUMP Ammonia DP4 _ - Nickel 35 Depth 2' PSB-03 SEALED STORM DRAIN `— FORMER Depth 9' Copper j PSB-06 I Concrete (TO WASTE WATER BUL TANKS copper Lilver F=ead PSA-05 Copper 11 TREATMENT SYSTEM) Seae TNic inel SOLDER (SECONDARY CONTAINMENT STRUUCTTURESREMAINING) Tirn�l Cyanide Cyanide MASK FAB Ammonia Ammonia 5 ETCH • OTH-04 DP19 CSA-01 1 F.N. Depth 12• Depth OTH-02 Depth 2' CSA-02 Copper Tin Depth F.N. pH 8.4 VOCs CAM 7 _ CAM 17 Depth F.N. pa` 20 Silver SOLDER MASK DP25 -A Tin r 180 Lead kel SVOCS Lo 3.5 Concrele5 PSB-04 Depth 2' cyanide PH 9.1 Tin Depth 10' Nickel 5.9 pH 11.8 Copper 1 o Depth FX PSB-05 TAM 17 D pth 5' SB4 Groundwater Copper TRPH Silver CAM 17 6' CuPPe` Lead LABORATORY pa°l 10 Tin DP20 Silver Nickel CAM 17 Leatl Copper OTH-06 • Depth 10' Depth 2' Tin Nickel Tin Silver Depth F N- Copper Copper Cyanide Tin Ammonia DP5 Leatl Lead Depth 9' Ammonia Cyanide Lead TRPH 44 Silver Silver Ammonia Cyankle Gmuntlwaler Nickel Nickel Tin Tin Copper Copper DP9 Depth 2' TIn Cyanide Silver PARKING Silver Depth 2' Copper Cyanide Ammonia Nickel Lead CAM 17 inter mmonia Tin Nickel Tin PSA-22 N�eI PSA-18 DP14 DP23 Depth s LOT Tin p Cyanide Cyanide Depth F.N- Tin Depth F.N. Depth 2' Depth 2' Copper pH N Ammons Ammonia Copper 1,100 Depth 5' Copper 300 K 7 CAM 17 Silver Depth 12' > VOCs Depth 5' CAM 17 Tin Nickel Copper Z SVOCS CAM 17 Tin e SVOCS Tin Silver DP7 nia Lead Tin Cyanide Depth 5' VOCsryickel DARKROOM VOCs Ammonia DP6 Depm 2 CAM 17 FINAL svocs Tin Depth 10' VOCs Depth 2' Copper Depth 5' Tin TESTING Depth 10• Cyanide CAM 17 svocs Silver MAINTENANCE y o+ Copper Lead CAM 17 Cyanide SHOP Copper Ammonia 3 Tin Depth 10' Silver Nickel Tin Ammonia Silver Groundwater Cyanide Copper Leatl Tin VOCs VOCs Lead > Ammonia Nickel SVOCS SVOCS Nickel Coppet VOCs Lilwedr Tin Depth 5' Tin Silver OTH-0� Depth 10' Depth 10' Lead Groundwater Nickel Cyanide CAM 17 Cyanide pF.N. CAM 17 Tin Ammonia Tin Copper Copper Ammonia Nickel J ' ;;+;d'• EGBE Cyanide Silver Silver Tin E Cyanide Depth 5' Nickel Nickel Amrtania Groundwater Ya Lead Lead Cyanitle o Copper p VOLS Ammonia Ammonia SVOCS Tin Tin !n Silver Copper I VOCs Leel Silver Cyanide Groundwater ~ Nickel Lead Depth 10• Ammonia ZTin Nickel Copper Groundwater Copper O Iver DP24 :20Cyanitle Tin Copper Lead Depth 5' Silver Lij Ammonia EGBE LeaA Silver Nickel VOCs N Ciel L, Depth 10' Leatl Tin SVOCS I Capper Tm Nickel Cyanide Groundwater 3 EXPLANATION Silver Groundwater Tin Ammonia O Lead CoSilpv err Ammonia Cyanide VOCs If) • DECEMBER 2001 F.N. FIRST NATIVE SOIL Nickel TVDCCs SAMPLE LOCATIONS ENCOUNTERED Tin Leatl I PRIOR SAMPLING RESULTS Cyanide Nickel PROPOSED DIRECT ND NOT DETECTED AREAS WITH NO CHEMICAL Ammonia Tin iT PUSH BORING USE OR STORAGE,SUCH AS Ammonia / RESULTS, EXCEPT PH, CONCRETE Groundwater o PROPOSED SLANT BORING, ARE REPORTED IN MILLIGRAMS SOIL OFFICES(NOT SHOWN) Co�Per DIRECTION INDICATED PER KILOGRAM(mg/kg) Lead FIGURE 5 I Nickel d PROPOSED SAMPLING Tin 3 WIPE SAMPLES: Cyanide O STANDPIPE CSA-10,CSA-11,CSA-12,OTH4, SOIL PSA-5,PSA-6, PSA-7,PSA-8,PSB-5 0 15 Amrtana PRIOR SAMPLING RESULTS AND PROPOSED SAMPLING r- ——1 LOCATIONS OF EXCAVATION DURING L--J 1988 SPILL RMONIAHYDROXIDE ETCH AND PSB-6 RESULTS NOT SHOWN. GROUNDWATER SCALE E A R T H `� T E C H 1950 W. FREMONT STREET r SPILL REMEDIATION u7 r 00 STOCKTON, CALIFORNIA NOVEMBER 2004 78676 J