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Superior Precision Anaiyticai, #7C. <br /> 1555 Burke, Unit 1 - San Francisco California 94124 - (4 151647-2081 /fax (4 15) 821-7123 <br /> EPA SW-846 METHOD 8240 - VOLATILE ORGANICS "-'- <br /> Quality Assurance and Control Data - Water <br /> Laboratory Number 90150 <br /> Average <br /> Method Spike <br /> Compound Blank RL Recovery Limits RPD <br /> (u9/L) (u9/L) <br /> Chloromethane: ND<10 10 <br /> Bromomethane: ND<10 10 <br /> Vinyl Chloride: ND<10 10 <br /> Chloroethane: ND<10 10 <br /> Methylene Chloride: ND<10 10 <br /> Acetone: ND<20 20 <br /> Carbon Disulfide: ND<3 3 <br /> Trichlorofluoromethane: ND<3 3 <br /> 1, 1-Dichloroethene: ND<3 3 77% 61.-145 4% <br /> 1, 1-Dichloroethane: ND<3 3 <br /> t-1, 2-Dichloroethene: ND<3 3 <br /> *oroform: ND<3 3 <br /> 2-Dichloroethane: ND<1 1 <br /> 2-Butanone: ND<20 20 <br /> 1, 1, 1-Trichloroethane: ND<3 3 <br /> Carbon tetrachloride: ND<3 3 <br /> Vinyl Acetate: ND<10 10 <br /> Bromodichloromethane: ND<3 3 <br /> 1, 2-Dichloropropane: ND<3 3 <br /> c-1,2-Dichloroethene: ND<3 3 <br /> c-1, 3-Dichloropropene: ND<3 3 <br /> Trichloroethene: ND<3 3 89% 62-137 1% <br /> Dibromochloromethane: ND<3 3 <br /> 1, 1,2-Trichloroethane: ND<3 3 <br /> Benzene: ND<1 1 85% 76-127 O% <br /> t-1, 3-Dichloropropene: ND<3 3 <br /> Bromoform: ND<3 3 <br /> 4-Methyl-2-Pentanone: ND<10 10 <br /> 2-Hexanone: ND<10 10 <br /> Page 4 of 5 <br /> Certified Laboratories <br />