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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364-9233 <br /> Analytical 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Opreafian Engineering, Inc Client Project ID Unocal#5098,5606 Pacific Ave,Stockton Sampled Nov 20, 1995 <br /> 2401 Stanwell Dr, Ste 400 Sample Matrix Sall Received Nov 21, 1995 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Dec 6, 1995 <br /> Attention Dennis Royce First Sample# 511-2073 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I I D I D I D I D I D <br /> mg/kg 511-2073 511-2074 511-2075 511-2076 511-20J7 511-2078 <br /> MW 16 (5) MW 16 (10) MW 16 (15) MW 16 (20) MW 16 (25) MW 16 (30) <br /> Purgeable <br /> Hydrocarbons 10 N D N D N D N D N D N D <br /> Benzene 00050 N D N D N D N D N D N D <br /> Toluene 00050 N D N D N D N D N D N D <br /> Ethyl Benzene 00050 N D N D N D N D N D N D <br /> Octal Xylenes 00050 N D N D N D N D el N D <br /> Chromatogram Pattern -- -- __ -- <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 1 0 1 0 1 0 1 0 <br /> Date Analyzed 12/2/95 12/2/95 12/2/95 12/2/95 12/2/95 12/2/95 <br /> Instrument Identification HP-5 HP-5 HP-5 HP-5 HP-5 HP-5 <br /> Surrogate Recovery, % 89 91 92 103 93 88 <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N O were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL, #1271 ' <br /> �7 <br /> Alan B Kemd <br /> Project Manager <br /> 5112073 KEI [1> <br />