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4D— Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 96W FAX(415) 364-9233 <br /> 404 N W.get lane Walnut Creek CA 94598 (510) 988 9600 FAX(5 10)9B9-9673 <br /> Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 96W FAX(916)921 0100 <br /> *Brown & Caldwell Client Project ID Arco 2133-95-5, Stockton Sampled Oct 23, 1995 <br /> 9616 Micron Ave , Suite 600 Sample Matrix Water Received Oct 24 1995 <br /> Sacramento, CA 95827 Analysis Method EPA 5030/8015/8020 Reported Nov 7, 1995 <br /> Attention Steve Misner First Sample# 510-0969 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with STEX DISTINCTION <br /> Reporting Sample <br /> Analyte Limit I D <br /> Ng/t- 510-0969 <br /> TANK <br /> urgea e <br /> Hydrocarbons 50 580 <br /> Benzene <br /> 050 20 <br /> Toluene 050 20 <br /> Ethyl Benzene 0 50 1 3 <br /> 0 Total Xylenes 050 31 <br /> Chromatogram Pattern Gasoline <br /> C6-C12 <br /> Quality Control Data <br /> Report Limrt Multiplication Factor 1 0 <br /> Date Analyzed 10/27/95 <br /> Instrument IdentrHcation GCHP-2 <br /> Surrogate Recovery, % 128 <br /> (OC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTICAL, FLAP #1624 <br /> W <br /> r4 <br /> Janet clan <br /> Project Manager <br /> 5100967 BRS <2> <br />