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Air Sampling Analytical Results <br /> Cove Contrators <br /> 3242 S. EI Dorado St <br /> Stockton, California <br /> Sampling Date: March 12,2008 <br /> Sample Number Units TGP-1 TGP-2 TEP-3 <br /> Methane % v/v 16.5 69.8 9.19 <br /> TPH as gasoline Ippm(v/vA 26 1 49 1 14 <br /> Benzene ppb v/v ND<2.7 3400 11 <br /> Benzyl Chloride ppb v/v 190 ND<13 ND<2.7 <br /> 2-Butanone ppb v/v 6.4 ND<13 ND<2.7 <br /> Carbon Disulfide ppb v/v 5 ND<6.7 1.5 <br /> Chlorobenzene ppb v/v ND<2.7 36 ND<1.4 <br /> Chloroethane ppb v/v ND<2.7 ND<6.7 11 <br /> Chloromethane ppb v/v ND<2.7 ND<6.7 5.3 <br /> Dichlorodifluoromethane ppb v/v ND<2.7 ND<6.7 9.5 <br /> Eth (benzene ppb v/v 260 480 4.1 <br /> 4-Eth (toluene ppb v/v) 18 34 ND<1.4 <br /> 4-Meth I-2-Pentanone ppb v/v 130 57 ND<2.7 <br /> o-X lene Reb v/v) 74 99 ND<1.4 <br /> m/ -X lenes ppb(v/v) 110 320 1.8.1 <br /> Styrene ppb(v/v) 69 14 ND<2.7 <br /> Tetrachloroethene ppb v/v ND<2.7 ND<6.7 2.4 <br /> Toluene ppb v/v 200 660 4.7 <br /> Trichloroethene ppb v/v 3.1 ND<6.7 ND<1.4 <br /> Trichlorofluoromethane - ppb(v/v ND<5.4 ND<13 4.4 <br /> 1,3,5-Trimeth (benzene ppb v/v 25 36 ND<1.4 <br /> 1,2,4-Trimethylbenzene ppb(v/v) 51 120 1.4J <br /> Notes: Analyzed by Calscience Environmental Laboratories in Garden Grove,CA <br /> <:Not detected above laboratory detection limits <br /> 0.93 Detected result <br /> P:\707 Cove Contractors\Groundwater\Lab data\Fourth Event_May07\Air Table\Air <br />