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Superior Precision Ana&p ca/, Inc. <br /> 1555 Burke Unit I • San Francisco, California 94124 ■ (415) 647-2081 / Fax (4 15) 821-7123 <br /> WESTERN GEO-ENGINEERING Project R603 <br /> Attn: GEORGE CONVERSE Reported 07-October-1993 <br /> EPA SW-846 METHOD 8240 - VOLATILE ORGANICS <br /> Laboratory Number Sample Identification Matrix <br /> 90150- 1 MW-1 Water <br /> 90150- 6 MW-6 Water <br /> RESULTS OF ANALYSIS <br /> Laboratory Number: 90150- 1 90150- 6 <br /> Chloromethane: ND<10 ND<10 <br /> Bromomethane: ND<10 ND<10 <br /> Vinyl Chloride: ND<10 ND<10 <br /> Chloroethane: ND<10 ND<10 <br /> Methylene Chloride: ND<10 ND<10 <br /> Acetone: ND<20 ND<20 <br /> Carbon Disulfide: ND<3 ND<3 <br /> Trichlorofluoromethane:ND<3 ND<3 <br /> 1, 1-Dichloroethene: ND<3 ND<3 <br /> 1, 1-Dichloroethane: ND<3 ND<3 <br /> t-1,2-Dichloroethene: ND<3 ND<3 <br /> Chloroform: ND<3 ND<3 <br /> 1,2-Dichloroethane: ND<1 ND<1 <br /> 2-Butanone: ND<20 ND<20 <br /> 1, 1, 1-Trichloroethane: ND<3 ND<3 <br /> Carbon tetrachloride: ND<3 ND<3 <br /> Vinyl Acetate: ND<10 ND<10 <br /> BromodichLloromethane: ND<3 ND<3 <br /> 1, 2-Dich'loropropane: ND<3 ND<3 <br /> c-1,2-Dichloroethene: ND<3 ND<3 <br /> c-1, 3-Dichloropropene: ND<3 ND<3 <br /> Trichloroethene: ND<3 ND<3 <br /> Dibromochloromethane: ND<3 ND<3 <br /> 1, 1,2-Trichloroethane: ND<3 ND<3 <br /> Benzene: ND<1 ND<1 <br /> t-1, 3-Dichloropropene: ND<3 ND<3 <br /> Bromoform: ND<3 ND<3 <br /> 4-Methyl-2-Pentanone: ND<10 ND<10 <br /> 2-Hexanone: ND<10 ND<10 <br /> Concentration: ug/L ug/L <br /> Page 2 of 5 <br /> Certified Laboratories <br />