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Table 1 -Groundwater Monitoring Data
<br /> Beacon Station No 641
<br /> 1210E Hammer Lane,Stockton,California
<br /> Well Date Hg B T E X MTBE DIPE ETBE TAME TBA Meth Eth Depth to TOC GW
<br /> NumberUW
<br /> MW-1 11/14/96 14,000 4400 1200 5 0 1300 1200 un gtL unga unP uglL ng/L ag/L GW Elevation ElevationComments
<br /> LL na na 5702 9953 4251 sheen
<br /> 03/18/97 1,900 220 17 <13 I3 270 na na na na na na 5125 4828 none
<br /> 03/3I/98 370 28 29 52 15 95 na na na na na na 4909
<br /> 06/10/98 <50 <0 50 <0 50 <0 50 <0 50 29 na na na na na na 46 06 50 44 no sheen,no odor
<br /> 09/08/98 $40 19001, 73 <5 0 130 1,100 <0 50 <0 50 081 20 5347 no sheen,no odor
<br /> 2,200 <5 0 49 55 4998 no sheen, odor
<br /> MW-2 10/02/97 83,000 16,000 18,000 2,600 12,000 940 <10 <10 <10 <1000 <10000 <20000 5564 9884 432 no sheen,no odor
<br /> 03/31/98 1,100 68 6 <0 50 99 14 na na na na na na 4845
<br /> 06/10/98 760 20 16 <0 50 16 <5 0 na na na na na na 4541 50 39 no sheen,slight odor
<br /> 09/08/98 2,000 350` <5 0 62 13 130 <0 50 <0 50 <0 50 24/ 250 <5 0 4872 53 43 no sheen,slight odor
<br /> 5012
<br /> -3 10/02/97 1,700 90 no sheen,no odor
<br /> 8 7 0 67 2 6 7 7 <0 50 <0 50 <0 50 <50 <5000 <1000 5762 9968 4206 no sheen,no odor
<br /> 03/31/98 170 067 <0 50 <0 50 <0 50 <5 0 na na na na na na 49 14 5054 no sheen,no odor
<br /> 06/10/98 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na 4610
<br /> 09/08/98 <50 4 5 ✓ <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 12' <50 <5 0 4974 53 58 no sheen,no odor
<br /> U�410/02/97 35,000 9,300 600 1,100 3,600 1,800 <g Q < 49 94 no sheen,no odor
<br /> 5 0 <5 0 <500 <50000 <10000 5745 10000 4255 no sheen,no odor
<br /> 03/31/98 2,000 14 39 <0 50 75 <50 na na na na na na 497206/I0/98 2,400 6 12 <0 50 1 I 12 na na na na na na 4663 5028 no sheen,slight odor
<br /> 09/08/98 660 29 � 5337 no sheen,slight odor
<br /> 1 48 <0 50 120 <0 50 <0 50 <0 50 Ii 230 <5 0 4987 5013 no sheen,no odor
<br /> 10/02/97 87,000 21,000 10,000 2,000 10,000 3,800 <5 0 <50 <5 0 <500 <50000 <10000 5733 9958 4225 no sheen,no odor
<br /> 03/31/98 10,000 2,100 1,500 270 710 530 na na na na na na 4919
<br /> 06/10/98 3,100 510 470 45 310 180 na na na na na na 4622 50 39 no sheen, odor
<br /> 5336 no sheen, odor
<br /> 09/08/98 24,000 6,500✓ 1,000 920 1,400 4,500 <2 5 <25 34 48'1 3,600 X25 4955
<br /> SW-1 I0/02/97 ns ns ns 50 03 no shoes, odor
<br /> - ns ns ns ns ns ns ns ns ns 5657 nm nm
<br /> 03/31/98 ns ns ns ns ns ns ns ns ns ns ns ns 5123 ns
<br /> 06/10/98 ns ns not ns
<br /> ns ns ns ns ns ns ns ns ns ns 4584
<br /> 09/08/98 ns ns ns ns ns ns ns ns ns ns ns ns 49 26 om ns
<br /> ns
<br /> Notes
<br /> TPHg=total petroleum hydrocarbons as gasoline The s;vcn oxygenated fuel
<br /> I B=benzene additive µg/L= micrograms per liter=parts per billion(ppb)
<br /> MTBE=methyl tertiary-butyl ether TBA=tertiary butyl alcohol GW=Groundwater
<br /> T=toluene DIPE=di-isopropyl ether Meth =methanol
<br /> E=ethylbenzene TOC=Top Of Casing �
<br /> ETBE=ethyl tertiary butyl ether Eth =ethanol na=not analyzed
<br /> X=xylenes TAME=tertiary amyl methyl ether
<br /> Depths and Elevations recorded in feet
<br /> I
<br /> 98gmtb!649 Page 1 of 1
<br /> HORIZON ENVIRONMENTAL INC.
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