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UP34 DP17D <br /> 3 NNirosodlmalhylsml� ND Hkkel 0.053 myL <br /> MTBE B.1 pglL N-Ndrosodimolhylamine S.S <br /> I Duplicate of DP34(DP43) <br /> DP36 N-Nlrosodimethylamine ND j <br /> I NNOmsadimelh mhe <br /> 103 WL IMTBE 62 p91L <br /> DPAI DP42 opal) <br /> Nkknl(1) 0.24mg4. NkNal(T1 11.4mglL f&ket(D) 'l0.538ngIL; bpi3b Dpi1 DP1O DpIBD 862 SBIT <br /> NIG a(Dy 0.07 mg4. NU (D) 0.024 mS1L Nklie),(O} 0.168 Nckel(D) 0,0207 rs+grL Nckel(0) 0,731:mg1L Nicke((Eiy 0.425 mplL NckeF(D) 9,0214 weL Nkkol(D) 0.04115 m.a- i <br /> MTBE 0.69 pglL MTBE 1.4 p!VL I <br /> DP15D Dp2 i <br /> DP13 Nckel(D) 0.&10 mg4 SB ♦ OPZ}t DP3 DP21 i <br /> • TRENCH DP28• "� SUMP SUMP t 583R <br /> • 5B3R DP22 <br /> ` DP12 • ® DPi8 STORAGE CHEMICAL <br /> DP20 STO4RASGE f <br /> Nk:kel(D) 0.75 mglL - - • <br /> PLATING SHOP A Dp•1e —11. -4—SB1T <br /> i MW-2 5131 SUMP <br /> r <br /> .. WASTE TREATMENT <br /> DP11R DP33 <br /> MTBE 0.09 pgR • Dp10R NNdmsodlmolhylamine 370 nA FORMER WATER <br /> MTBE 3.7 pg4. ;MTBE 18I13IL's'I • TANKS 8B$ • <br /> DP9 DP1g (REMOVED) OP27 <br /> Nickel(D) 0.04 m44 <br /> DP96 <br /> OP23 14 <br /> . <br /> 3 MTBE 3.2 pgIL Nckel(0) 0.7dt mg!L DP36 •DPI j <br /> 77 •----PP5 N-Ndmsadlmamylsmino 23 ng1L <br /> ( DP37 Nkkel(D) 0.400.mg7: MFBEa :.74..ypIL MW-1 <br /> MTBE 1-5pg7L PLATING /SB4 SUMP <br /> Dupllcate of DP37(DP44) pp7 SHOP B �• SUMP <br /> O MW�3 M78E 1.2pgIL Nkkat(D) .:0:357:mg4: SEALED STORM DRAEN FORMER <br /> [CV (TO WASTE WATER .&± <br /> SULK STORAGE <br /> TREATMENT SYSTEM) DP20 O TANKS ;. <br /> l Dp34 DPs FAB (SECONDARY CONTAINMENT i <br /> STRUCTURES REMOVED <br /> V) Nlckel(T7 D,17 mglL <br /> Nkkef(D) 0.784.mgIL ) <br /> V) "Nicke({D} 0.74 mga.::-: bP40 • DP14 <br /> MTBE 3.7 <br /> I MTSE 7.2 pg4. <br /> SOLDER •DP25 j <br /> MASK DP4 I <br /> d o ETCH SOLDER <br /> a W(D) 0.0856 mg1L MASK <br /> o LABORATORY <br /> a <br /> rn <br /> 3 <br /> O I <br /> i <br /> Q <br /> PARKING <br /> U LOT <br /> M DARKROOM FINAL <br /> TESTING MAISNANCE <br /> HOPIT <br /> 1 <br /> i v <br /> EXPLANATION GENERAL NOTES: <br /> M GROUNDWATER MONITORING WELL 1. HISTORICAL RESULTS ARE FROM GRAB GROUNDWATER SAMPLING. NICKEL(T) TOTAL.NICKEL <br /> LOCATION NICKEL(D) DISSOLVED NICKEL <br /> 2. AUGUST 2006 GROUNDWATER SAMPLES WERE ANALYZED FOR VOCs USING <br /> AUGUST 2006 GROUNDWATER SAMPLE EPA METHOD 8260E(EXTENDED LIST).ONLY MTBE DETECTED AT OR ABOVE ND NOT DETECTED x <br /> LOCATION ITS REPORTING LIMITS IS SHOWN. <br /> .� JANUARY 2005 SLANT BORING, DISSOLVED NICKEL EXCEEDING CALIFORNIA MCL(0.1 mg1L) <br /> DIRECTION INDICATED 3. SELECT AUGUST 2006 GROUNDWATER SAMPLES WERE ANALYZED FOR <br /> TOTAL NICKEL AND DISSOLVED NICKEL(LABORATORY FILTERED)USING N-NITROSODIMETHYLAMINE(NDMA)EXCEEDING <br /> 0A JANUARY 2005 DIRECT PUSH BORING EPA METHOD 6020. JANUARY 2005 GROUNDWATER SAMPLES WERE CALIFORNIA NOTIFICATION LEVEL(10 ng1L) 0 25 <br /> m ANALYZED FOR DISSOLVED NICKEL(FIELD FILTERED),BUT MAY HAVE HAD <br /> FILTER BREAKTHROUGH, <br /> METHYL TERT-BUTYL ETHER(MTBE)EXCEEDING <br /> � CALIFORNIA PRIMARY MCL(13 mglL) SCALE IN I=FFY <br /> 0 4. SELECT AUGUST 2006 GROUNDWATER SAMPLES WERE ANALYZED FOR <br /> NDMA USING EPA METHOD 607/1625 METHOD, JANUARY 2005 DETECTION <br /> € OF NDMA AT DPI 7D WAS USING EPA METHOD 8270C, <br /> FIGURE 3 <br /> o HISTORICAL GROUNDWATER CONCENTRATIONS <br /> j Y E A R T H T E G H FROM 2005/2006 INVESTIGATIONS <br /> 1950 W. FREMONT AVENUE <br /> STOCKTON, CALIFORNIA <br /> i JULY 2008 102790 <br />