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,T <br /> Table 1 <br /> Soil Vapor Analytical Results <br /> Former Chevron Service Station 94054 <br /> 2103 Country Club Boulevard <br /> Stockton, California <br /> Analyte <br /> Sample Sample TPH-GRO 1 ,2-DCA MTBE <br /> Identification Date pg/m3 pg/m3 pg/m3 Leak Detection Gas <br /> SV-1 05/20/08 390 <4.0 <3 .5 150 <br /> SV-2 05/20/08 220 <3.9 <3.4 150 <br /> SV-3 05/20/08 < 160 <8. 1 <7.2 <22 <br /> SV-4 05/20/08 <75 <3.7 <3.3 <9.9 <br /> SV-5 05/20/08 <120 <6.0 <5.4 <16 <br /> SV-7 05/20/08 130 <5 .4 <4.8 200 <br /> SV-8 05/20/08 <82 <4. 1 <3.6 23 <br /> SV-9 05/20/08 < 100 <4.9 <4.0 <13 <br /> SV-1 (Lab Dup) 05/20/08 370 <4.0 <3.5 130 <br /> SV-1 ( Field Dup) 05/20/08 21800 <4. 1 <3.6 14 <br /> ESL 105000 94 95400 NA <br /> Explanations : <br /> TPH-GRO = Total petroleum hydrocarbons as gasoline <br /> 152-DCA = 1 ,2-Dichloroethane <br /> MTBE = Methyl tertiary butyl ether <br /> Leak Detection Gas = 171 -Difluoroethane <br /> pg/m3 = microgram per cubic meter <br /> < = Not detected at or above the laboratory detection limit shown <br /> ESL = Table E-2 . May 2008 San Franciso Bay Region Water Quality Control Board Environmental Screening Levels <br /> NA = Not applicable <br /> 8/19/2008 Page 1 of 1 <br /> G:\DIV 11 \D0007\May 2008 Vapor Results.xls <br />