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©© North State Environmental <br /> r © Chemical Waste Disposal • Trucking • Consulting <br /> CERTIFICATE OF ANALYSIS <br /> Lab No: 96-904 Date Sampled: 12/09/96 <br /> Was, Client: SemcoaM Date Analyzed: 12/18/96 <br /> Project: 1131 Holly Dr.Tracy,CA Date Reported: 12/19/96 <br /> Volatile Organics by GUMS Method 8260 <br /> Laboratory Number 96-904-01 <br /> Client ID Pit Bottom <br /> Matrix Soil <br /> ug/Kg <br /> Van, Analyte Results <br /> Ethylbenzene ND<5 <br /> m,p-Xylene 11 <br /> o-Xylene ND<5 <br /> Styrene ND<5 <br /> Bromoform ND<50 <br /> Isopropyl benzene ND<5 <br /> ssn Bromobenzene ND<50 <br /> 1,1,2,2-Tetrachloroethane ND<5 <br /> n-Propyl benzene ND<5 <br /> 2-Chlorotoluene ND<5 <br /> lan 4-Chlorotoluene ND<5 <br /> 1,3,5-Trimethylbenzene 7 <br /> t-Butylbenzene ND<5 <br /> 1.2,4-Trimethylbenzene 23 <br /> 1.3-Dichlorobenzene ND<5 <br /> 1.4-Dichlorobenzene ND<5 <br /> sec--Butylbenzene ND<5 <br /> 1,2-Dichlorobenzene ND<5 <br /> .. p-Isopropylbenzene ND<5 <br /> Butylbenzene NIX5 <br /> 1,2-Dibromo-3-chloroethane ND<5 <br /> Naphthalene ND<5 <br /> ., 1,2.4-Trichlombenzene ND<5 <br /> Hexachlorobutadiene ND<5 <br /> r. Surrogate Recoveries% <br /> 1,2-Dichloroethane d4 135 <br /> Toluene d8 91 <br /> an, 4-Bromofluorobenzene 90 <br /> _ I <br /> Page 2 of 4 <br /> ass <br /> P.O . Box 5624 • South San Francisco, California 94083 415.588.2838 FAX 588- 1950 <br />