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j SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> Wprealian 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 3550/8015 Reported Nov 25, 1992 <br /> Attention Mardo Kaprealian, P E First Sample# 211-0508 <br /> TOTAL EXTRACTABLE PETROLEUM HYDROCARBONS as HYDRAULIC FLUID <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 211-0508 211-0509 211-0510 211-0511 211-0512 211-0513 <br /> EB5-(4) E135-(7) EB5-(9 5) EB6-(4) EB6-(7) EB6-(9 5) <br /> Extractable <br /> Hydrocarbons 10 N D N D N D N D N D N D <br /> Chromatogram Pattern -- -- - -- - <br />,0 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 1 0 1 0 1 0 1 0 1 0 <br /> Date Extracted 11/20/92 11/20/92 11/20/92 11/20/92 11/20/92 11/20/92 <br /> Date Analyzed 11/24/92 11/24/92 11/24/92 11/24/92 11/24/92 11/24/92 <br /> Instrument Identification HP-3A HP-3A HP-3A HP-3B HP-36 HP-3B <br /> Extractable Hydrocarbons are quantitated against a fresh hydraulic fluid standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> WE011.1101 NALYTICAL <br /> ott A leffo <br /> Project Manager 2110460 KEi <17> <br />