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C Superior Precision Analytical, /nc_ <br /> 155S Burke Unit I • San Francisco California 94 124 ■ {4 1 5J 647 2081 / fax (41 51 8Z i-7 ) 23 <br /> C E R T I F I C A T E O F A N A L Y S I S <br /> LABORATORY NO. 12594-1 DATE RECEIVED- 12/06/91 <br /> CLIENT: Sierra Environmental DATE REPORTED: 12/12/91 <br /> Services JOB NO 1-146--04 <br /> EPA SW-846 METHOD 8240 - VOLATILE ORGANICS <br /> by Gas Chromatography/ Mass Spectrometry <br /> SAMPLE MW-5 <br /> Compound ug/1 Compound ug/l <br /> Chloromethane ND< 10 Cis-1 , 3-Dichloropropene ND< 3 <br /> Bromomethane ND< 10 Trichloroethene (MDL=3 ) 7 <br /> Vinyl Chloride ND< 10 Dibromochloromethane ND< 3 <br /> Chloroethane ND<10 1 , 1 , 2-Trichloroethane ND<3 <br /> Methylene Chloride ND< 10 Benzene (MDL=1 ) 1 <br /> Acetone ND< 10 Trans-1 , 3-Dichloropropene ND< 3 <br /> Carbon disulfide ND<3 2-Chloroethyl vinyl ether ND< 3 <br /> Trichlorofluoromethane ND<3 Bromoform ND< 3 <br /> �1-Dichloroethene ND<3 4-Methyl-2-Pentanone ND< 10 <br /> 1-Dichloroethane ND< 3 2-Hexanone ND< 10 <br /> 1 , 2-Dichloroethene (trans ) ND< 3 Tetrachloroethene(MDL=3 ) 120 <br /> Chloroform ND<3 1 , 1 , 2 , 2-Tetrachloroethane ND< 3 <br /> 1 , 2-Dichloroethane(MDL=1 ) 68 Toluene ND< 3 <br /> 2-Butanone ND<20 Chlorobenzene ND< 3 <br /> 1, 1 , 1-Trichloroethane ND<3 Ethylbenzene ND< 3 <br /> Carbon Tetrachloride ND<3 Styrene ND< 3 <br /> Vinyl Acetate ND< 10 Total Xylenes ND< 3 <br /> Bromodichloromethane ND< 3 1, 3-Dichlorobenzene ND< 3 <br /> 1 , 2-Dichloropropane ND<3 1, 2&1 , 4-Dichlorobenzenes ND< 3 <br /> 1, 2-Dichloroethene (cis ) ND<3 <br /> ug/1 = part per billion (ppb) <br /> QC DATA <br /> Surrogate Recoveries QC Limits <br /> water soil <br /> 1 , 2-DCA-d4 . . . . . . 114% 76-114 70-121 <br /> Toluene-d8 . . . . . . . . . . . . 96% 88-1.10 81-117 <br /> Bromofluorobenzene . . . . . . 94% 86-115 74-121 <br /> comments - <br /> Richard Srna, Ph .D. <br /> r n ^ 1 <br /> Laboratoy i r� ctor <br /> Certified Laboratootes <br />