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<br /> Table 1
<br /> Groundwater Monitortng Data v
<br /> Beacon Station No 641
<br /> 1210 E.Hammer Lane,Stockton,California
<br /> Well Date TPHg B T E X MTBE DIPE ETBE TAME TBA Meth Eth. EDC EDB Depth to TOC GW
<br /> Number u u u u /L /1, u&j u /L ug/l, ugIL u v /L u /L GW Elevation Elevation Comments
<br /> MW-1 11/14/96 14,000 4,400 1,200 510 1,300 1,200 "a na na na na na na na 5702 9953 4251 sheen
<br /> screen 03/18/97 1,900 220 17 <13 13 270 na na na na na na na na 5125 4828 none
<br /> interval 03/31/98 370 28 29 52 15 95 na na na na na na na na 4909 5044 no sheen,no odor
<br /> I
<br /> 60'40' 06/10/98 <50 <0 50 <0 50 <0 50 <0 50 29 na na na na na na na na 4606 5347 no sheen,no odor
<br /> 09/08/98 840 190 73 <5 0 130 1,100 <0 50 <0 50 081 20 2,200 <5 0 na na 4955 4998 no sheen, odor
<br /> 12/30/98 <50 096 <0 50 <0 50 <0 50 65 na na na na na na na na 4403 5550 no sheen, odor
<br /> 03/25/99 80 <0 50 <0 50 <0 50 <0 50 68 <0 50 <0 50 <0 50 56 <50 <50 na na 4141 58 12 odor/no sheen,
<br /> 06/02/99 60 <0 50 <0 50 <0 50 <0 50 45 <10 <10 <10 <10 <50 <10 <10 <l 0 4250 5703 odor/no sheen,
<br /> 08/31/99 1,500 82 36 54 30 3,400 <0 50 <0 50 13 140 <500 <5 0 <0 50 <0 50 4810 5143 no comment
<br /> MW-2 10/02/97 83,000 16,000 18,000 2,600 12,000 940 <10 <10 <10 <1000 <100000<20000 na na 5564 9884 4320 no sheen,no odor
<br /> screen 03/31/98 1,100 68 6 <0 50 99 14 na na na na na na na na 4845 5039 no sheen,sleght odor
<br /> interval 06/10/98 760 20 16 <0 50 16 <50 na na na na na na na na 4541 5343 no sheen,shght odor
<br /> 50'-75' 09/08/98 2,000 350 <5 0 62 13 130 <0 50 <0 50 <0 50 24 250 <5 0 na na 4872 50 12 no sheen,no odor
<br /> 12/30/98 97 54 <0 50 <0 50 <0 50 11 na na na na na na na na 4331 5553 no sheen,no odor
<br /> 03/25/99 74 20 <0 50 <0 50 <0 50 11 <0 50 <0 50 <0 50 <5 0 <50 <5 0 na na 4066 5818 no sheen,no odor
<br /> 06/02/99 1,700 52 080 46 1 1 19 <0 50 <0 50 <0 50 37 <50 <5 0 <0 50 <0 50 4170 5714 no sheen,no odor
<br /> 08/31/99 5,600 1,100 26 400 110 930 <2 0 <2 0 <2 0 100 <200 <20 27 <2 0 4734 5150 no comment
<br /> MW-3 10/02/97 1,700 90 87 067 26 77 <0 50 <0 50 <0 50 <50 <5000 <1000 na na 5762 9968 4206 no sheen,no odor
<br /> screen 03/31/98 170 067 <0 50 <0 50 <0 50 <5 0 na na na na na na na na 4914 5054 no sheen,no odor
<br /> interval 06/10/98 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na na na 4610 53 58 no sheen,no odor
<br /> 50'-75' 09/08/98 <50 45 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 12 <50 <5 0 na na 4974 4994 no sheen,no odor
<br /> 12/30/98 <50 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na na na 4417 55 51 no sheen,no odor
<br /> 03/25199 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 na na 4157 58 11 no sheen,no odor
<br /> 06/02/99 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 54 <50 <5 0 <0 50 <0 50 4267 5701 no sheen,no odor
<br /> 08/31/99 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <50 <0 50 <0 50 48 17 5151 no comment
<br /> j MW4 10/02/97 35,000 9,300 600 1,100 3,600 1,W0 <5 0 <5 0 <50 <500 <50000 <10000 na na 5745 10000 4255 no sheen,no odor
<br /> screen 03/31/98 2,000 14 39 <0 50 75 <50 na na na na na na na na 4972 5028 no sheen,slight odor
<br /> Interval 06/10/98 2,400 6 12 <050 11 12 na na na na na na na na 4663 5337 no sheen,slight odor
<br /> 50'-75' 09/08/98 660 29 1 48 <0 50 120 <0 50 <0 50 <050 11 230 <50 na Ila 4987 50 13 no shccn,no odor
<br /> 12/30/98 180 <050 088 <0 50 12 28 na na na na na na na na 4456 5544 no sheen,no odor
<br /> 03/25/99 80 <0 50 <0 50 <0 50 <0 50 80 <0 50 <0 50 <0 50 56 <50 <50 na na 4194 5806 no sheen,no odor
<br /> 06/02/99 160 <0 50 <0 50 <0 50 <0 50 41 <0 50 <0 50 <0 50 25 <50 <50 <0 50 <0 50 4290 5710 no sheen,no odor
<br /> 08/31/99 460 86 <050 085 <0 50 540 <050 <050 <0 50 40 <50 <50 <050 <0 50 4839 5161 no comment
<br /> MW-5 10/02/97 87,000 21,000 10,000 2,000 10,000 3,800 <50 <5 0 <50 <500 <50000 <10000 na na 5733 9958 4225 no sheen,no odor
<br /> screen 03/31/98 10,000 2,100 1,500 270 710 530 na na na na na IIA na na 4919 5039 no sheen, odor
<br /> ivtervat 06/10/98 3,100 5I0 470 45 310 180 na na na na na t>a na Ila 4622 5336 no sheen, odor
<br /> 50'-75' 09/08/98 24,000 6,500 1,000 920 1,400 4,500 <2 5 <2 5 34 48 3,600 <25 na Ila 4955 5001 no sheen, odor
<br /> 12/30/98 340 32 <25 29 <2 5 980 na na na na ila na na na 4410 5548 no sheen, odor
<br /> 03/25/99 540 I00 19 12 36 280 <10 <10 -10 `100 <50 <5 0 111 na 4147 58 It odor I no shcca,
<br /> 06/02/99 2,700 1,200 83 230 120 1200 <0 50 �0 50 <0 50 51 <50 <50 <0 50 �0 50 4251 5707 odor/no sheen,
<br /> 08/31/99 1 30,000 4,700 3,700 1,700 2,600 9,100 <050 051 41 310 <500 <5 0 <0 50 --050 4810 5148 no comment
<br /> 99gmtbl 641 Page i of 2 HORIZON ENVIRONMENTAL INC
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