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TABLE 3 GROUNDWATER MONITORING DATA Beacon Station No 12474 3440 East Main Street,Stockton,California ethyl- total i Depth to TOC GW Well TPHg ben2iene toluene benzene xylenes MTBE DIPE ETBE TAME TBA methanol ethanol DCA EDBj GW Elevabon Elevabon Number Date u IL (u }L) ((ug/L} u L u IL) (u IL) (a IL ug/L) (u91L) (u IL) u IL u IL �(ug/L) u L feet feet ms1 feet msl Comments VW 1 09/08/96 170000 360PO 47000 3300 24000 070 <0 50 <0 50 <0 50 <50 61 68 no no 5888 nm nm strong odortno sheen f screened 12r30198 190000 u0b0 49000 3300 24000 <1000 no no no na no no no no 5710 nm odor/no sheen interval 03/25/99 260000 1 37 55001D 4800 32000 -50 <5 0 <5 0 <50 <50 <500 <50 no no 5505 nm no comment 60-65 06103M 120000 2 26000 3500 23000 <50 <50 <50 <50 <50 <500 <50 140 520 5419 nm no comment 06!30199 '130000 2500 46000 3900 25000 450 <50 <50 <50 <500 <50DO <500 160 620 5628 nm no comment 12110199 200000 220PO 35000 3300 23000 4100 4100 <100 <100 <5000 <10000 <2000 160 590 5642 nm no comment 03103100 180000 230p0 36000 2500 18000 <100 <100 <1D0 <100 <11000 <20 000 <1000 1500 5800 5563 nm no odorino sheen { 0622100 190000 23000 39000 3200 22000 -100 <100 <100 <100 <1000 <10 DOD -1000 130 540 5416 nm no odorMa sheen 09/28/00 nsrt# ns ns ns ns ns ns ns ns ns ns ns ns nm nm 12122/00 190000 29004 42000 2900 20000 <2000 na no no no na no no no 5582 nm odor 100 sheen 0328101 180000 3640000 4900 20000 <500 na na na na na no no no 5493 nm odor/no sheen 06/27/01 19WOO 26 4DDDO 3900 24000 <200 <200 <200 <200 -2000 '20000 140W 290 730 5643 nm odor 1 no sheen 09/06/01 230000 3601DO 43000 3300 20000 -2000 no no no na no no no no 5860 nrn odor I no sheen 12104!01 200000 320{)0 41000 3500 23000 <10DO no no no no no no no no 5891 nm no odorhto sheen 03/01/02 230000 290DO 37000 3700 24000 <2000 no no no no no no no no 5774 nm slight odorino sheen 0520102 1220000 32 41000 3600 23000 <200 <200 <200 <200 <2000 <20000 <2000 <200 e200 5786 2751 -3035 no ododno sheen 08410/02 200000 31 31000 2600 17000 <1000 no no no no no no no no 60 W 3339 odor/slight sheen 12106102 170000 31000 33000 2800 1 BODO <25 no no no no no no no no 6123 3372 odor/no sheen 03107!03 210000 35000 46000 330D 21000 <2000 na no no no no no no no 6021 3270 odor Inosheen 06/03/03 220DOO 370W 46000 3500 22000 <100 <100 <100 <1D0 <1000 <100DO <1000 390 6DO 5921 3170 odor/no sheen OW29/03 ,230000 35CjDD 33000 3100 21000 <1000 no no no no no no no no 6130 3379 no odor/no sheen 11125/03 ns 4 ns ns ns ns ns ns ns ns ns ns ns ns 4638 1887 not sampled 03/01/04 210000 37400 37000 2700 19000 <50 <50 <50 <50 <500 <5000 <500 92 <50 6096 2522 -3574 odarl no sheen 06/08104 200000 33doo 45000 2700 18000 <1000 no no no no no no no no 6103 3581 odor?no sheen 09109104 170000 3COM 28000 2500 15WO -1000 no no no no no no no no 6259 3737 odor 1 no sheen 12/09/D4 120000 2 n 24000 1500 11000 <500 no no no no no no no na 6282 3760 odor Ino sheen 03110/05 ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm not sampled I �I VW-4 09108/98 66000 1900 6900 3100 20000 14 <0 50 <0 50 <0 50 <5 0 740 <5 0 no no 5910 nm II nm strong odor/no sheen screened 12/30/98 79000 29QOO 1600 3700 16000 -100 no no no no no no no na 5728 nm pelrol odorino sheen interval 03/25/99 89000 14000 2700 3200 13000 <5 0 <50 <5 0 <50 <50 <500 <50 no no 5523 nm no comment 50-GS 06/03/99 ' 39000 10000 1600 2900 11000 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 930 120 5444 nm no comment 08/30199 50000 92 1500 3500 12000 86 420 -20 <20 -200 <2000 <200 850 64 5653 "nm no comment 12/10/99 64000 9t 2200 2800 9700 <20 <20 <20 <20 <200 <10000 <200 710 42 5651 tl nm no comment 03/03/00 ns tars ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry 0622100 nsI ns ns ns ns ns ns ns ns ns ns ns ns nm ,nm dry 09/28M 11 I n ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry 12/22100 55000 64L0L0� 16W 3200 5400 <200 no no no no no no no no 5601 I nm odor I no sheen 0328/01 41OW 52Uu 2000 2700 4600 -200 no no no no no na na no 5500 }nm odor/no sheen 0627101 28000 5 SOD 3000 1900 <20 <20 <20 <20 <200 <2000 -200 370 <20 5642 run odor I no sheen 09106/01 26000 2 410 2800 840 <100 no na no no n8 no na no 5845 rj nm odor l no sheen I 12/04111 22000 2 550 2400 1200 -100 no no na na no no no no 5910 nm odor I no sheen 03/01/02 20000 1 110 2500 1400 el oo no no no na no no no no 5795 nm odor/no sheen 0520102 16000 13 430 2000 1600 410 <10 410 410 <100 -1000 <100 130 410 5809 2774 3035 no oda/no sheen 08/30/02 20D00 1 0 460 2300 1300 <100 no no no no na no no no 6104 3330 odor/no sheen 12106102 36WO 3600 1000 3D00 4300 <20 no no no no no no no no 6144 3370 odor I no sheen 03/07103 45000 46bD 2400 31 DO 6700 <200 no no no no no no no no 6037 3263 odor Ino sheen 06/03/03 138000 5300 710 3100 4800 <20 <20 <20 420 4200 <2000 <200 420 <20 5977 3203 odor I no sheen 08/29103 140000 su1200 2500 4000 <200 no na no no no no na no I 61 51 3377 no odor/no sheen 11/25103 Its I + ns ns ns ns ns ns ns ns ns ns ns ns 6199 13425 not sampled 03/01/04 33000 4600 1300 2400 3300 <10 <10 <10 410 <100 c1 DDO <100 38 <10 6070 2522 3548 odor I no sheen 06108/04 ris I 11s ns ns ns ns ns ns ns Its ns ns ns ns 6104 13582 not sampled 09/09/04 20000 3800 450 1400 980 <100 no no no na no no no na 6275 137 53 odor f no sheen 12118/14 ns I s AS ns ns ns ns ns ns ns ns ns ns ns 6288 3766 not sampled 03/10105 ns Is ns ns its ns ns ns ns ns ns ns ns ns nm nm not sampled 5 I Notes TPHg=total petroleum hyd rbons as gasoline TAME-ten amyl,-methyl ether GW-groundwater ns=not sampled MTBE=methyi-tert butyl ethe 7 TBA=ted butanol TOC=top of casing nm=not measured DIPE=dnsopropyl ether I DCA=1 2-drehloroethane msl=mean sea level oc=not calculated ETGE=eftyl-ten.butyl ether I EDS=1 2 dibromoethane <=less than Indy tod reporting limit 474gm e 8 of 8 HOlZIZ EAViROliidBNTAL INC 1 Projad No 7415