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31-0308 Table 1 Summary of Results of Ground Water Sampling Chevron Service Station A 9-4275 2905 (fest Benjamin Holt Drive, Stockton, California Concentrations in parts per billion (ppb) ataaaaaaaaanaaaaaaaasacaaaaaaaaaaaaaaaaaaaaaaaaacasasaaaaaaasaaaaaaaaaaaaaaaaacc=aaaRaaaasaaaamsx=caaaaaaaaac=zaa_aaaaaaaaaasoccansaaasasanaasaasccaaaaaaa=-aaaaaacsa � WELL DATE OF TOP OF DEPTH GROUND TPH-G TOG 0 T E X 1,2 1,2 1,3 1,4 F113 TCE LAB ID SAMPLING/ CASING TO WATER DCA DCB DC8 DCB MONITORING ELEVATION WATER ELEVATION aaaasaaaaacaaaaaasaaaccaaaa:aaaa=caaaaaaaaaaasaaaaa=aeasaaacacaaaaapaaaasaaaaa_aa=aaaasaaasacaaaaaaaasaaasaa=_aaaaaaaaaaaasaaaaaa..�saasaa:afsasaxaa RW-1 03/22/89 2.24 16.29 -14.05 30000 ND<3000 3600 1300 1100 2700 ND<50 ND<10 --- --- ND<50 --- CCAS MW-1 06/12/89 2.24 16.91 -14.67 20000 --- 4400 1600 2900 5900 ND<20 ND<20 --- --- NO<100 --- SAL MW-1 09/07/89 2.24 18 38 -16.14 20000 ... 4100 480 920 1500 ND<10 ND<10 --- ... ND<50 ... CCAS MW-1 12/18/84 2.24 17.60 -15.36 17000 --- 4200 200 17 1200 ... ... -•- --- PACE NW-1 03/20/90 2.24 17.22 -14.98 13000 ... 6400 580 2200 1200 ... - --- --- PACE MW-1 07/03/90 2.24 18.04 -15.80 17000 --- 4800 410 1300 1200 --- "' '•' ... --- PACE NW-1 10/19/90 2.24 19.34 -17.10 16000 4800 290 1700 700 --- --- --- --- --- --- PACE NW-1D 10/19/90 2.24 19.34 -17.10 17000 ... 5600 270 1700 660 --- --- --- "-' --- PACE RU-1 01/17/91 2.24 19.04 -16 80 10000 --- 3100 38 950 170 --- --- SAL ___ --• _-_ --_ MW-1D 01/17/91 2.24 19.04 -16.80 9800 --- 3200 39 980 170 --- SAL MY-1 03/19/91 2.24 --- •-- 16000 --- 2900 45 960 290 --- 3.8 ND<3 380 --- --- SAL NW-1 07/18/91 2.24 19.20 -16.96 12000 --- 3300 90 1100 250 --- --- "' '"' """ SAL NW-1D 07/18/91 2.24 19.20 -16.96 12000 •-- 3300 90 1100 250 --- -'- --- --- SAL MW-1 10/31/91 2.24 19 62 -17.38 9800 --- 2600 18 720 180 0.8 ND<0.5 ND<0.5 ND<0.5 --- ND<0.5 SAL NW-1 01/16/92 2.24 18.82 -16.58 12000 --- 3600 54 %0 370 ^-- --- --- --` --- SAL NW-1 03/17/92 2.24 17.60 -15.36 9800 --- 3600 150 700 360 .•^ --- --- --- --- --- SAL N11-1 06/29/92 2.24 19.22 -16.98 7700 ... 3000 33 600 230 --- --- --- -^- ... --- SAL i I MW-2 03/22/89 3.41 17.54 -14.13 9000 ND<3000 750 20 480 730 HOOD ND<10 ... --- ND40 --- CCAS MW-2 06/12/89 3.41 18.19 -14.78 ND<10000 --- 1200 $o 710 870 ND<20 ND<20 --- --- ND4100 --- CCAS NW-2D 06/12/89 3.41 18.19 -14 78 11000 --- 1400 90 790 1100 ND<10 ND<20 ... --• ND<100 --- CCAs MW-2 09/07/89 3.41 19.66 -16.25 14000 ... 3200 ND<200 1200 800 ND-c50 ND<50 ... --- ND<200 --- CGS MW-2 12/18/89 3.41 18.85 -15.44 10000 2500 ND<25 130C 340 --- --- --- ... --- -.. PACE MW-2 03/20/90 3.41 18.49 -15.08 13000 --- 4800 88 2100 1500 --- --- --- ... --- --. PACE MW-2 07/03/90 3.41 19.07 -15.66 21000 5700 600 1900 1700 --- --- --- ... --- --- PACE MW-20 07/03/90 3.41 19.07 -15.66 14000 --- 5000 400 2000 920 ... --- --- ... --• --- PACE MW-2 10/19/90 3.41 20.06 -16.65 11000 --- 4400 77 190 340 --- ... --- --- ... PACE NW-2 01/17/91 3.41 20.31 -16.90 16000 5400 68 1600 280 --- --- ... --- --' --- SAL MW-2 03/19/91 3.41 --- --- 8700 --- 4300 50 1500 260 --- 13 ND<15 450 --- --- SAL MW-2 07/18/91 3.41 20.48 -17.07 6200 ... 1100 6.2 710 89 --- --- --- --- -" SAL RW-2 10/31/91 3.41 20.87 -17.46 32000 2900 ND<15 1800 2700 7.1 ND<0.5 ND<0.5 ND<0.5 --- ND<0.5 SAL NW-2D 10/31/91 3.41 20.87 -17.46 33000 --- 2900 ND<15 1800 2700 --- --- --' --' SAL NW-2 01/16/92 3.41 20 06 -16.65 14000 ... 2400 21 1100 840 --- ... --- ... --- -" SAL MW-2 03/17/92 3.41 18.86 -15 45 13000 --- 3900 26 890 1100 --- --- -" "- SAL MW-2 06/29/92 3.41 20 45 -17.04 20000 --- 2800 97 2200 1700 --- --- --- -'- --' SAL 04-Aug-92 Page 1