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WE I
<br /> GROUNDWATER MONITORING DATA
<br /> C1 Beacon Station No.474
<br /> 3440 East Main Street,Stockton,California
<br /> ethyl- total Depth to TOC GW
<br /> Well TPHgG- O
<br /> toluene benzene xylenes MTBE DIPE ETRE TAME TBA methanol ethanol EDC EDB GW Elevation Elevation
<br /> Number Date (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (feet) (feet msl) (feet msl) Comments
<br /> MW-5 03/31/98 <50 <0.50 <0.50 <0.50 <0.50 <5.0 no na no no na na 61 11 25,11 -3600
<br /> scn=cd 06/10/98 <50 <0.50 <050 <0.50 <0.50 <5.0 no na no no na na 58 41 -33.30 no odor 1 no sheen
<br /> no odor/no sheen
<br /> lntetvrrA. 09/08/98 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 5841
<br /> 3
<br /> 65141&51, 12/30/98 <50 <0.50 2.5 0.89 5.8 <5.0 na no no na na no 56.51 -31.40 no odor I no sheen
<br /> 03/25/99 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 54.54 -29.43 no comment
<br /> 06/03/99 <50 <0.50 <0.50 <0.50 <0 50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 <0.50 <0.50 53.89 -2878 no comment
<br /> 08/30/99 95 1.7 7.4 2.1 15
<br /> <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 <0.50 <0.50 56.04 30.93 no comment
<br /> 12/10/99 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 <0.50 <0 50 55.99 30.88 no comment
<br /> 03/03100 <50 <0.50 051 <0.50 0.92 <0.50 <0.50 <0.50 <0.50 <5.0 <50 6.0 <0.50 <0.50 54.53 -29.42 no odor/no sheen
<br /> 06/22/00 <50 <0.50 <0.50 <0.50 <0 50 <0.50 <0.50 <0.50 0.50 <5.0 <50 24 <0.50 <0.50 53.75 -28.64 no odor/no sheen
<br /> MW.6 0313IA98 78,000 23,000 8,500 1,100 6,300 <500 no na no no no no 61.43 25.44 -35.99 reported as MW-2A
<br /> screened 06/10/98 120,000 23,000 17,000 1,600 15,000 <500 na na na na na na 58.69 33.25 reported as MW-2A
<br /> interval; 09/08/98 120,000 30,000 20,000 2,300 18,000 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 58.77 -33.33 odor/no sheen
<br /> 56'.=76'.: 12/30/98 71,000, 20,000 6,500 1,900 11,000 <250 no no na no no no 56.85 -31 41 slight odor 1 no sheen
<br /> 03/25/99 48,000 15,000 1,800 910 5,100 <0.50 <0.50 <0 50 <0.50 20 <50 56 54.86 29.42 no comment
<br /> 06/03/99 33,000 9,600 2,500 1,100 5,400 <5.0 <5.0 <5.0 <5.0 <50 <500 <50 <5.0 I0 5414 -2870 no continent
<br /> 08/30/99 51,000 7,200 5,400 2,400 11,000 42 <20 <20 <20 <200 <2000 <200 32 56 56.32 -3088 no comment
<br /> 12/10/99 67,000 13,000 2,400 1,800 9,500 <20 <20 <20 <20 <200 <50 <200 68 46 56.29 3U 85 no comment
<br /> 03/03/00 28,000 6,000 280 570 3,600 <20 <20 <20 <20 <200 <50 <200 <20 <20 54.89 29.45 no odorino sheen
<br /> 06/22/00 26,000 •6,500 570 710 2,900 <10 <10 <10 <10 <100 <1000 <104 <10 <10 54.11 -28.67 slight odor lno sheen
<br /> 11R�V 7 03/31/98 <50 <0.50 <0.50 <0.50 <0.50 <5.0 no no na no no no 61 75 25.66 -36 09
<br /> ssci..e-6ed'' 06/10/98 <50 <0.50 <0.50 <0.50 <0.50 <5 0 no no no no no no 59.04 -33.38 no odor I no sheen
<br /> (ntc 1 09/08/98 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 59.19 33.53 no odor 1 no sheen
<br /> 4
<br /> 12/30/98 <50 <0.50 <0.50 <0.50 <0.50 <5.0 no no no no na na 57.18 31.52 no odor 1 no sheen
<br /> 03/25199 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0
<br /> <50 <5.0 55.07 -29 41 no comment
<br /> 06/03/99 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <050 <0.50 <0.50 <5.0 <50 <5.0 5.6 <0.50 54.61 -28 95 no comment
<br /> 08!30/99 <50 <O.SU <0.50 <0.50 <O.SU
<br /> <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.o 2.1 <0.50 56.85 -31 19 no comment
<br /> 12/10/99 <50 <0.50 <0.50 <0.50 <0.50 0.50 <0.50 <0.50 <0.50 <5D <50 <5.0 4.7 <0.50 56.68 -31 02 no comment
<br /> 03/03/00 <50 <0.50 <0.50 <0.50 <0.50 0,62 <0.50 <0.50 <0.50 <5.0 <50 <5.0 5.0 <0.50 55.61 -29 95 no odor/no sheen
<br /> 06/26/00 <50 <0,50 <0.50 <0.50 <0.50 <0.50 <0,50 <0.50 <0.50 <5.0 <50 9.4 4.0 <0.50 5=4.62 -28 96 no odorino sheen
<br /> MW4 03/31/98 100 <0.50 <0.50 <0.50 <0 50 <5.0 na na na na na na 6 1.51 25-68 -35 83 reported as MW-3A
<br /> scrieened 06/10/98 80 0.9 <0.50 <0.50 <0.50 <5.0 na no na na na na 58.86 33 18 rcpnrtrJ as MW-3A
<br /> interval ' 09/08/98 79 0.57 <0.50 <().50 <0.50 <0.50 <0.50 <050 <0.50 <5.0 <51) <5,0 58.97 -33 29 slight odor/no sheen
<br /> 56'=76' 12/30/98 51 2.4 0,69 <0.50 <0 50 <5 0 na no no ata na na 57 13 -31 45 slight odor!aio sheen
<br /> 03/25/99 <50 <0.50 <0.50 <0.50 <0.50 <0.50 Q.50 <0.50 <0.50 <5.0 <50 <5.0 55.09 1941 no cummem
<br /> 06103!99 <50 <0.50 <0 50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5,0 <0.50 <0 50 54.42 -28 74 no comment
<br /> 08/30/99 <50 0.67 <0.50 <0.50 <0.50 <0.50 <0.50 <0 50 <0.50 <5.0 <50 <5,0 <0.50 <0 50 56.60 -30.92 no comment
<br /> 12/10/99 330 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0,50 <0.50 5.1 <50 <10 0.51 <0.50 56.57 -30 89 no comment
<br /> 03/03/00 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0,50 <0.50 <5.0 <50 <5.0 <0.56 <0 if) 55.28 -29.60 no odor/no sheen
<br /> 06/22/00 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <50 12 003 <0 50 54.37 -2869 no odorino sheen
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<br /> 1474.43 Page 2 of 4 HORIZON ENVIRONMENTAL INC.
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