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CAMBRIA
<br /> Table 4 Additional Groundwater Chemical Analytical Data-Monitoring Wells,Shell-branded Service Station,6131 Pacific Avenue,Stockton,California
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<br /> Sample Date Ethanol Methanol TBA MTBE D1PE ETBE TAME
<br /> (Figll) ...,.(Agn) (ttP�1) (Irg/l) (Ag/1) (AgIl) (ugIl)
<br /> MW-6 20-May-98 NA NA <3,300 <67 <67 <67 <67
<br /> MW-6 29-Jul-98 <10,000 NA <2,000 <40 <40 <40 <40
<br /> MW-6 23-Nov-98 NA NA <100 <2 0 <2 0 <2 0 <2 0
<br /> MW-6 24-Feb-99 <15,000 <1,000 <1,000 <10 <10 <10 <10
<br /> MW-6 13-N[ay-99 <1,000 <1,000 <200 <2 0 <2 0 <2 0 <2 0
<br /> MW-6 20-Aug-99 <1,000 <1,000 <200 <2 0 <2 0 <2 0 <2 0
<br /> MW-6 16-Aug-00 NA NA <200 <100 <100 <100 <100
<br /> MW-6 30-Aug-01 NA NA <50 <0 50 <2 0 <2 0 <2 0
<br /> MW-7 09-Oct-97 <16,500 <1,000 <3,300 <66 <66 <66 <66
<br /> MW-7 I0-Feb-98 <31,000 <1,000 <6,200 <120 <120 <120 <120
<br /> MW-7 20-10ay-98 NA NA <10,000 <200 <200 <200 <200
<br /> MW-7 29-Jul-98 <16,600 NA <3,300 <67 <67 <67 <67
<br /> MW-7 23-Nov-98 NA NA <3,300 <66 <66 <66 <66
<br /> MW-7 24-Feb-99 <50,100 <1,000 <3,340 <33 4 <33 4 <33 4 <33 4
<br /> MW-7 13-May-99 <50,000 <1,000 <10,000 <100 <I00 <100 <100
<br /> MW-7 20-Aug-99 <1,000 <1,000 <2,000 <20 <20 <20 <20
<br /> MW-7 16-Aug-00 NA NA <400 <20 0 <20 0 <20 0 <20 0
<br /> MW-7 30-Aug-01 NA NA <50 <2 0 <2 0 <2 0 <2 0
<br /> VEW-2 09-0ct-97 <500 <1,000 <100 <2 0 <2 0 <20 <2 0
<br /> VEW-2 10-Feb-98 <50,000 <5,000 <10,000 <200 <200 <200 <200
<br /> VEW-2 20-May-98 NA NA <20,000 <400 <400 <400 <400
<br /> VEW-2 29-Jul-98 <71,100 NA <14,300 <286 <286 <286 <286
<br /> VEW-2 23-Nov-98 NA NA <10,000 <200 <200 <200 <200
<br /> VEW-2 24-Feb-99 <150,000 <10,000 <10,000 <100 <100 <100 <100
<br /> VEW-2 13-May-99 <62,500 <1,000 <12,500 <125 <125 <125 <125
<br /> VEW-2 20-Aug-99 <20,000 <1,000 <4,000 636 <40 0 <40 0 <40 0
<br /> VEW-2 16-Aug-00 NA NA <4D0 228 <20 0 <20 0 <20 0
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