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o Superior Precision Analyrical, /rrc. <br /> 1555 Burke Unit I - San Francisco California 94124 - (4 15) 647-2081 / fax [4151821-7 123 <br /> • <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 /> 15043-12 P-4-3 ' Soil <br /> RESULTS OF ANALYSIS <br /> Laboratory Number: 15043-12 <br /> Tetrachloroethene: ND<15 <br /> 1, 1,2 ,2-Tetracl-ethane:ND<15 Z, <br /> Toluene: ND<15 <br /> Chlorobenzene: ND<15 <br /> Ethyl Benzene: ND<15 <br /> Styrene: ND<15 <br /> Xylenes: ND<15 <br /> 1, 3-Dichlorobenzene: ND<15 <br /> 1, 4-Dichlorobenzene: ND<15 <br /> 1, 2-Dichlorobenzene: ND<15 <br /> Concentration: ug/kg <br /> -- Surrogate % Recoveries -- <br /> 1, 2-Dichloroethane-d4 : 100 <br /> Toluene-d8 : 104 <br /> Bromof luorobenzene: 98 <br /> i <br /> Page 5 of 7 <br /> Certified Laboratories <br />