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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#5421,7303 Pacific Ave,Stockton Sampled Nov 9, 1992 <br /> 2401 Stanwell Drive, 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 Kaprealian, P E First Sample # 211-0502 <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 211-0502 211-0503 211-0504 211-0505 211-0506 211-0507 <br /> EB4-(35) EB4-(40) E64-(45) EB4-(50) EB4-(55) E134-(58 5) <br /> Extractable <br /> Hydrocarbons 1 0 N D N D N D N D N D N D <br /> Chromatogram Pattern -- <br /> Quality <br /> -Quality Control Data <br /> Report Limit Multiplication Factor 1 0 10 1 0 1 0 1 0 10 <br /> Date Extracted 11/20/92 11/20/92 11/20/92 11/20/92 11/20/92 11/20/92 <br /> Date Analyzed 11/23/92 11/23/92 11/23/92 11/23/92 11/23/92 11/23/92 <br /> Instrument Identification HP-3A HP-3A HP-3A HP-3A HP-3A HP-313 <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 /> SEQUOI NALYTICAL <br /> tt <br /> Project Manager <br /> 217046oKl=1 <14> <br />