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• i • <br /> TABLE I <br /> GROUNDWATER MONITORING DATA <br /> Beacon Station No 3641 <br /> 1210 E Hammer Lane,Stockton,California <br /> Depth to TOC GW <br /> Well TPHg benzene toluene ethylbenzene xylenes MTBE DIPE ETBE TAME TBA methanol ethanol EDC EDB GW Elevation Elevation <br /> Number Date tuanl (UqA) u n u !I Won) NOu R (u2A) u n u 11 u n u n u n u A feet feet msl feet msl Comments <br /> VW 7 03/25/99 25000 5700 3300 1500 1700 2000 <50 <5 0 <5 0 200 <50 <5 0 na na 4167 nm nm slight odor I no sheen <br /> screened 06102199 11000 3300 320 1100 230 1700 <5 D <5 0 <5 0 92 <100 <5 0 <50 <5 0 4194 nm slight odor 1 no sheen <br /> interval 08131!99 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 4735 nm 0 21 N FP/sheen <br /> 40 55 12109199 87000 2300 1000 1500 5400 6400 -50 <50 <50 <500 <5000 <500 <50 <50 4526 nm no comment <br /> 03/01700 11000 2200 160 640 640 4300 <50 <50 <50 <500 <5000 <500 na na 4247 nm no comment <br /> 06!06100 15000 2400 440 620 1100 3000 <5 0 <5 0 <50 280 <2000 <50 <5 0 <5 0 41 50 nm dear <br /> 09/14100 46000 440 560 1600 3000 1000 <50 <5 0 <50 76 <600 <50 <5 0 <5 0 4781 nm dearlsheen <br /> 12112!00 17000 940 420 450 1600 5200 na na na na na na na na 4416 nm dear <br /> 03119101 4100 650 16 160 94 2900 na na na na na na na na 4138 nm dear <br /> 06!19101 24000 2800 870 770 1800 730D na na na na na na na na 4386 nm dear <br /> 09127/01 51000 14DO 3900 1800 6800 1400 na na na na na na na na 5001 nm dear <br /> 12113101 4400 270 70 140 240 2000 na na na na na na na na 4657 nm dear <br /> 03/28/02 24000 1100 760 850 2100 2500 na na na na na na na na 43 14 1929 -2385 dear <br /> 06/19/02 360W 2600 2000 1200 4600 5100 na na na na na na na na 44 89 2560 dear <br /> 09/16/02 57000 2400 5000 1600 6300 2800 <10 <10 <10 150 <2500 <100 410 <10 5020 3091 dear <br /> VW-8 03125M ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm nm dry <br /> screened 06/02/99 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> interval 08131/99 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> 2732 12109199 ns ns ns ns ns ns ns ns ns ns ns as ns ns dry nm dry <br /> 03/01100 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> 06106100 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> 09/14100 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> 12112n00 ns ns ns ns ns ns AS ns ns ns ns ns ns ns dry nm dry <br /> 03!19101 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> 06/19101 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> 09/27101 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> 12113!01 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> 03/28/02 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> 06/19102 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> OW16102 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> Notes TP116-total petroleum hydrocarbons as basobne Rbn=mscrobrems per Iver(pans per billion or ppb) <br /> MTBE-methyl ten butyl ether GW=broundmncr <br /> DIPE-dttsopropyl ether TOC=top of casing <br /> ETBE=ethyl ten butyl ether na=not analyzed <br /> TAME=ten amyl methyl ether FP=free product <br /> TBA=ten buryl alcohol <br /> 641gmr01 xis <br /> 164122 page 7 of 7 HORIZON ENVIRONMENTAL INC <br />