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• T*E 1 • <br /> Groundwater Monitoring Data <br /> Beacon Station No 3641 <br /> 1210 E Hammer Lane,Stockton,California <br /> Depth to TOC GW <br /> Welt TPHg benzene toluene ethylbenzene xylenes MTBE DIPE ETBE TAME TBA methanol ethanol EDC EDB GW Elevation Elevation <br /> Number Date (ugA) (ugA) (ugA) (ugA) (ug") (ugA) (ugA) (ugA) (ugA) (u ) (ugA) (ugA) (ugA) (ug/1) (feet) (feet msl) (feet msl) Comments <br /> VW-6 03125/99 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm nm <br /> screened 06102/99 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm <br /> Interval 08/31/99 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 4773 nm sheen <br /> 22-32 12/09199 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 03/01/00 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 06106/00 ns ns ns ns ns ns AS ns ns ns ns ns ns ns nm nm dry <br /> 09114100 ns ns ns ns ns ns ns ns ns ns ns ns ns ns nm nm dry <br /> 12/12/00 ns ns ns ns n5 ns ns 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 /> 06/19/01 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> 09/27/01 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> VW-7 03/25/99 25000 5700 3300 1500 1700 2000 <50 <50 <5 0 200 <50 <5 0 na na 4167 nm nm slight odor 1 no sheen <br /> screened 06/02/99 11000 3300 320 1100 230 1700 <50 <50 <5 0 92 <100 <5 0 <5 0 <50 41 94 nm slight odor 1 no sheen <br /> interval 08/31/99 ns ns ns ns ns ns ns ns ns ns ns ns ns ns 4735 nm 0 21 ft FP/sheen <br /> 40-55 12/09/99 87000 2300 1000 1500 5400 6400 <50 <50 <50 <500 <5000 <500 <50 <50 4526 nm no comment <br /> 03101100 11000 2200 160 640 640 4300 <50 <50 <50 <500 <5000 <500 na na 4247 nm no Comment <br /> 06/06/00 15000 2400 440 620 1100 3000 <50 <5 0 <5 0 280 <2000 <50 <5 0 <5 0 4150 nm dear <br /> 09/14/00 46000 440 560 1600 3000 1000 <50 <50 <5 0 76 <600 <50 <5 0 <5 0 4781 nm dearlsheen <br /> 12/12/00 17000 940 420 450 1600 5200 na na na na na na na na 4416 nm dear <br /> 03/19/01 4100 650 16 180 94 2900 na na na na na na na na 4138 nm dear <br /> 06/19/01 24000 2800 870 770 1800 7300 na na na na na na na na 4386 nm dear <br /> 09/27101 51000 1400 3900 1800 6800 1400 na na na na na na na na 5001 nm dear <br /> VW-8 03/25/99 ns ns n$ 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 08/31199 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> 22-37 1210W99 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> 03101/00 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> 06106/00 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> 09/14/00 ns ns ns ns ns ns ns ns ns ns ns ns AS ns dry nm dry <br /> 12/12/00 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> 03119/01 ns ns ns ns ns ns ns ns ns ns ns ns AS 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 /> 09/27/01 ns ns ns ns ns ns ns ns ns ns ns ns ns ns dry nm dry <br /> Notes TPHg-lolal petroleum hydrocarbons as gawlme pgA-micrograms per liter(parts per billion or ppb) <br /> MTBE-methyl tett butyl ether OW-groundwater <br /> DIPE-dnsopropyl ether TOC-top of casing <br /> ETBE-ethyl tert butyl ether na=not analyzed <br /> TAME-wn-amyl methyl ether FP=free product <br /> TBA-tert butyl alcohol <br /> 641gmr00 AS <br /> 164143 Page 6 of 6 HORIZON FAVIRONK11MAL INC <br />