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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 Unocal#5421,73M PacificAve, Stockton Sampled Nov 10, 1992 <br /> 2401 Stanwell Dave, Suite 400 Sample Matrix Sod Received Nov 11, 1992 <br /> Concord, CA 94520 Analysis Method EPA 3550/8015 Reported Nov 25, 1992 <br /> Attention Mardo Kapreahan, P E First Sample # 211-0484 <br /> TOTAL EXTRACTABLE PETROLEUM HYDROCARBONS <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 211-0484 211-0485 211-0486 211-0487 211-0488 211-0489 <br /> EB3-(5) E63-(1 0) EB3-(15) EB3-(20) EB3-(25) EB3-(30) <br /> Extractable <br /> Hydrocarbons 10 N D N D N D N D N D N D <br /> Chromatograrn Pattern - -- - -- -- <br /> Duality Control Data <br /> Report Limit Multiplication Factor 10 1 0 1 0 1 0 10 1 0 <br /> Date Extracted 11/18/92 11/18/92 11/18/92 11/18/92 11/18/92 11/18/92 <br /> Date Analyzed 11/20/92 11/20/92 11/20/92 11/20/92 11/20/92 11/20/92 <br /> Instrument Identification HP-3A HP-3A HP-3A HP-3A HP-313 HP-3A <br /> Extractable Hydrocarbons are quantitated against a fresh diesel standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> WUOLYTIC <br /> jecager 2110460 KE[ <11> <br />