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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue a Suite LM e Concord, California 94520 <br /> (510) 686-9600 e FAX (510) 686-9689 <br /> Kaprealian Engineering, Inc Client Project ID Unocal#5421,7303 Pacific Ave,Stockton Sampled Nov 10, 1992 <br /> 2401 Stanwell Drive, Suite 400 Sample Matrix Soil Received Nov 11, 1992 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported Nov 25, 1992 <br /> Attention Mardo Kapreahan, P E First Sample # 211-0516 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample <br /> Analyte Limit ID ID <br /> mg/kg 211-0516 Matrix <br /> EB7-(25) Blank <br /> Purgeable <br /> Hydrocarbons 10 N D <br /> Benzene 0 005 N D <br /> Toluene 0 005 N D <br /> Ethyl Benzene 0 005 N D <br /> Total Xylenes 0 005 N D <br /> Chromatogram Pattern <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 1 0 <br /> Date Analyzed 11/17/92 11/17/92 <br /> Instrument Identification HP-5 HP-5 <br /> Surrogate Recovery, % 109 111 <br /> (OC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> 0SE000 ANALYTICAL <br /> colt A le o <br /> Project Manager 2110460 KEI <10> <br />