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�4 -- TABLE 1 ' <br /> GROUNDWATER MONITORING DATA <br /> Quik Stop No. 076 <br /> 1030 South Olive Avenue, Stockton, California <br /> ethyl- total TOC GW <br /> Well Date TPHg benzene toluene benzene xylenes MTBE DIPE ETBE TAME TBA DCA EDB DTW Elevation Elevation Comments <br /> Number Sampled (ug/L) (ug L) (ug/L) (u L) (u L) u /L) (ug/L) (u L) (ug/L) (ug/L) (ug/L) (u (feet) (feet msl) (feet msl) <br /> MW-1 7/11/03 210 1 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <0.50 <0.50 64.12 nm nm no odor/no sheen <br /> screened 3/15/04 1,000 30 110 12 56 <0.50 <0.50 <0.50 <0.50 6.3 0.99 0.95 66.24 nm nm no odor/no sheen <br /> interval 6/10/04 410 1.4 4.9 0.62 2.4 <0.50 <0,50 <0.50 <0.50 6.0 <0.50 <0.50 65.42 nm nm no odor/no sheen • <br /> 55'-75' <br /> 6/1/05 MW-1 drilled out, boring reamed to 10"and deepened to 80', MW-1 re-installed as 24 well <br /> 60-80' 6/6/05 160 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 64.60 31.09 -33.51 no odor/no sheen <br /> 8/17/05 3,100 <0.50 <0.50 <0.50 <0.50 <0.50 na na na na na na 65.30 -34.21 no odor/no sheen <br /> 11/16/05 1,400 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <0.50 <0.50 65.80 -34.71 no odor/no sheen <br /> 2/8/06 4,800 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <0.50 <0.50 63.66 -32.57 no odor/no sheen <br /> 5/18/06 2,800 <0.50 6.6 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <0.50 <0.50 61.10 -30.01 no odor/no sheen <br /> 8/14/06 2,100 0.68 0.83 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <0.50 <0.50 59.75 -28.66 no odor/no sheen <br /> 12/9/06 2,200 1.1 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 5.8 <0.50 <0.50 57.99 -26.90 no odor/no sheen <br /> 2/22107 1,300 1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 5.5 <0.50 <0.50 56.56 -25.47 no odor/no sheen <br /> 6/13/07 760 0.70 0.75 <0.50 <0.50 <0.50 na na na na na na 56.35 -25.26 no odor/no sheen <br /> TPHg-total petroleum hydrocarbons as gasoline DCA-1,2-dichloroethane ug/L-micrograms per liter or parts per billion(ppb) <br /> Notes: MTBE-methyl-t-butyl ether EDB-1,2-dibromoethane <-less than reporting limit given <br /> DIPE-diisopropyl ether DTW=depth to groundwater <br /> ETBE-ethyl-t-butyl ether TOC=top of casing <br /> TAME-ten-amyl methyl ether met=mean sea level <br /> TBA-tert-butanol GW=groundwater 40 <br /> 7076-07gmr <br /> Project No.7078.43 Page 1 of 1 HORIZON ENVIRONMENTAL INC. <br />