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Sequoia 680 Chesapeake Dnve Red-ood City CA 9406; (415) 364 96W FAX (415) 364 9233 <br /> 404 N Wiser Lane Walnut Creek CA 94598 (510) 988 96W FAX <br /> (51 <br /> Analytical 819 Sinker Avenue Se (916) 921 9600 FAX Suite a Sacramento CA 95834 (9[6)988 967; <br /> 6)921 0100 <br /> Pacific Environmental Group, Inc Client Project ID Arco 2133, Stockton Sampled Mar 19, 1996 <br /> 11315 Sunrise Gold Circle, #M Sample Matrix Water Received Mar 21, 1996 <br /> Rancho Cordova, CA 95742 Analysis Method EPA 5030/6015/8020 Reported Apr 3, 1996 <br /> Attention Greg Barclay First Sample # 603-1011 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Lim>t ID ID ID ID ID ID <br /> lug/L 603-1011 603-1014 603-1015 603-1016 603-1017 603-1018 <br /> MW2 MW5 E-2 E-3 E-4 ES <br /> Purgeable <br /> Hydrocarbons 50 4,800 8,200 730 15,000 4,700 150 <br /> Benzene 050 250 190 56 480 530 059 <br /> Toluene 050 18 19 27 12 35 N D <br /> Ethyl Benzene 0 50 56 24 15 390 250 N D <br /> Total Xylenes 050 280 800 13 660 350 065 <br /> Chromatogram Pattern Weathered Weathered Weathered Weathered Gasoline Weathered <br /> Gasoline Gasoline Gasoline Gasoline C6-C12 Gasoline <br /> C6-C12 C6-C12 C6-C12 C6-C12 CS-C12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 25 10 1 0 10 20 1 0 <br /> Date Analyzed 03/28/96 03/27/96 03/27/96 03/28/96 03/30/96 03/28/96 <br /> Instrument Identification GCHP-1 GCHP-1 GCHP-1 GCHP-2 GCHP-1 GCHP-2 <br /> Surrogate Recovery, % 91 72 95 100 94 <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 Please Note <br /> E P #1624 "Matrix interference <br /> Linda C Schneider <br /> Project Manager/Sacramento Laboratory <br /> 6031010 PEs <2> <br />