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l SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue - Suite LM • Concord, California 94520 <br /> I&V (510) 686-9600 • FAX (510) 686-9689 <br />*Kaprealian Engineering, Inc Client Project ID Unocal#5421,'7303 Pacific Ave,Stockton Sampled Nov 9, 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 Kaprealian, P E First Sample# 211-0466 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I D I D I D I D I D 10 <br /> mg/kg 211-0466 211-0467 211-0468 211-0469 211-0470 211-0471 <br /> E131-(35) EB1-(40) EB1-(45) EB1-(50) EB1-(55) EB1-(575) <br /> Purgeable <br /> Hydrocarbons 1 0 1 2 N D N D N D N D N D <br /> Benzene 0 005 022 N D N D N D N D N D <br /> Toluene 0 005 00084 N D N D N D N D N D <br /> Ethyl Benzene 0 005 N D N D N D N D N D N D <br /> Total Xylenes 0 005 016 N D N D N D N D N D <br /> Chromatogram Pattern Gasoline -- - <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 1 0 1 0 1 0 1 0 <br /> Date Analyzed 11/13/92 11/13/92 11/13/92 11/13/92 11/13/92 11/13/92 <br /> Instrument Identification HP-4 HP4 HP-4 HP-4 HP4 HP-4 <br /> Surrogate Recovery, % 106 106 107 109 109 109 <br /> (OC Limits = 70-130°x) <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 />.SEQUOIA ANALYTICAL <br /> Scott A Chie o <br /> Project Manager 2110460 KEI <2> <br />