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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> Kaprealian Engineering, Inc Client Project ID unocai#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 # 211-0472 <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 I D <br /> mg/kg 211-0472 211-0473 211-0474 211-0475 211-0476 211-0477 <br /> EB2-(5) EB2-(10) EB2-(15) EB2-(20) EB2-(25) EB2-(30) <br /> Purgeable <br /> Hydrocarbons 1 0 N D N D N D N D N D 1 2 <br /> Benzene 0 005 N D N D N D N D 0 017 0 040 <br /> Toluene 0 005 00055 N D N D N D 00052 00052 <br /> Ethyl Benzene 0 005 N D N D N D N D 0 052 0 021 <br /> iTotal Xylenes 0 005 00082 N D N D N D 0 038 012 <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 11/16/92 11/13/92 11/13/92 11/13/92 11/16/92 11/13/92 <br /> Instrument Identification HP-2 HP-5 HP-5 HP-5 HP-2 HP-5 <br /> Surrogate Recovery, % 99 107 112 108 99 106 <br /> (QC 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 NALYTICAL <br /> r <br /> Sco A Ch e o <br /> Project Manager 2110460 KEI <3> <br />