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1i] Superior Precision o na/ytica/, /rnc. <br /> 1555 Burke Unrt I ■ San Francisco California 94124 ■ (41 5) 647-2081 /fax (415) 821-7123 <br /> TOUCHSTONE DEVELOPMENTS Project 2396-1 <br /> Attn: MICHAEL TAMBRONI Reported 29-December-1993 <br /> EPA SW-846 METHOD 8240 - VOLATILE ORGANICS <br /> Laboratory Number Sample Identification Matrix <br /> 15043- 7 TX-7-16 ' Soil <br /> 15043- 8 TX-8-16 ' Soil <br /> 15043- 9 P-1-3 ' Soil <br /> 15043-10 P-2-3 ' Soil <br /> 15043-11 P-3-3 ' Soil <br /> RESULTS OF ANALYSIS <br /> Laboratory Number: 15043- 7 15043- 8 15043- 9 15043-10 15043-11 <br /> Tetrachloroethene: 35 24 ND<15 ND<150 ND<15 <br /> . 1, 1, 2 ,2-Tetracl-ethane:ND<15 ND<15 ND<15 ND<150 ND<15 <br /> Toluene: ND<15 ND<15 ND<15 3000 ND<15 <br /> Chlorobenzene: ND<15 ND<15 ND<15 ND<150 ND<15 <br /> Ethyl Benzene: ND<15 ND<15 ND<15 1700 ND<15 <br /> Styrene: ND<15 ND<15 ND<15 ND<150 ND<15 <br /> Xylenes: ND<15 ND<15 ND<15 11000 ND<15 <br /> 1, 3-Dichlorobenzene: ND<15 ND<15 ND<15 ND<150 ND<15 <br /> 1, 4-Dichlorobenzene: ND<15 ND<15 ND<15 ND<150 ND<15 <br /> 1,2-Dichlorobenzene: ND<15 ND<15 ND<15 ND<150 ND<15 <br /> Concentration: ug/kg ug/kg ug/kg ug/kg ug/kg <br /> - Surrogate % Recoveries - <br /> 1, 2-Dichloroethane-d4 : 104 105 108 102 96 <br /> Toluene-d8 : 98 100 88 103 94 <br /> Bromofluorobenzene: 99 98 114 105 95 <br /> Page 3 of 7 <br /> Certified Laboratories <br />