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Dt ' SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue - Shite LM - Concord, California 94520 <br /> (510) 686-9600 - FAX (510) 686-9689 <br /> Ka0ealian Engineering, Inc Client P>oject ID Unocal Bulk Plant,2835 Navy Dr,Stockton Sampled Jul 30, 1992 <br /> 2401 Stanwell Drive, Suite 400 Sample Matrix Soil Received Jul 30, 1992 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported Aug 4, 1992 <br /> Attention Mardo Kapreaiian, P E First Sample# 207-0681 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample <br /> Analyte Limit I D I D I D I D I <br /> mg/kg 207-0681 207-0682 207-0683 207-0684 Matrix <br /> SW2-A SW2-B SW2-C SW2-D Blank <br /> Purgeabie <br /> Hydrocarbons 10 N D N D N D N D <br /> Benzene 0 005 N D N D N D N D <br /> Toluene 0 005 N D N D N D N D <br /> Ethyl Benzene 0 005 N D N D N D N D <br /> Total Xylenes 0 005 N D N D N D N D <br /> Chromatogram Pattern - - -- -- <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 1 0 10 1 0 <br /> Date Analyzed 7/31/92 7/31/92 7/31/92 7/31/92 7/31/92 <br /> Instrument Identification HP-4 HP-2 HP-2 HP-2 HP-4 <br /> Surrogate Recovery, % 100 103 98 103 109 <br /> ((:)C 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 /> . SEQUOIA ANALYTICAL <br /> colt A C ieffo 2070681 KE] <1> <br /> Project Manager <br />