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Elisuperior P•cision Ana/ ica/.p/r7c. <br /> P - <br /> 1555 Burke Unit 1 ■ San Franosco California 94124 • (4 15) 647-2081 /fax (4 15) 82 1-7 123 <br /> TOUCHSTONE DEVELOPMENTS Project 2396-1 <br /> Attn: MICHAEL TAMBRONI Reported 20-December-1993 <br /> EPA SW-846 METHOD 8240 - VOLATILE ORGANICS <br /> Laboratory Number Sample Identification Matrix <br /> 15038- 6 SP-2B Soil <br /> 15038- 7 SP-2C Soil <br /> 15038- 8 SP-2D Soil <br /> RESULTS OF ANALYSIS <br /> Laboratory Number: 15038- 6 15038- 7 15038- 8 <br /> Tetrachloroethene: ND<15 ND<15 ND<15 <br /> 1, 1, 2, 2-Tetracl-ethane:ND<15 ND<15 ND<15 <br /> Toluene: ND<15 ND<15 ND<15 <br /> Chlorobenzene: ND<15 ND<15 ND<15 <br /> Ethyl Benzene: ND<15 ND<15 ND<15 <br /> Styrene: ND<15 ND<15 ND<15 <br /> Xylenes: 30 ND<15 31 <br /> 1, 3-Dichlorobenzene: ND<15 ND<15 ND<15 <br /> 1,4-Dichlorobenzene: ND<15 ND<15 ND<15 <br /> 1, 2-Dichlorobenzene: ND<15 ND<15 ND<15 <br /> Concentration: ug/kg ug/kg ug/kg <br /> -- Surrogate % Recoveries -- <br /> 1, 2-Dichloroethane-d4 : 96 99 101 <br /> Toluene-d8 : 104 104 106 <br /> Bromof luorobenzene: 104 102 111 <br /> Page 5 of 7 <br /> Certified Laboratories <br />