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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> 11W Analytical <br /> Pacific Environmental Group, Inc Client Project 10 Arco 2133, Stockton, CA Sampled Sep 26, 1996 <br /> 11315 Sunrise Gold Circle, #M Sample Matrix Water Received Sep 27, 1996 <br /> Rancho Cordova, CA 95742 Analysis Method EPA 5030/8020, DHS Luft Reported Oct 11, 1996 <br /> Attention Greg Barclay First Sample # 609-1257 <br /> i <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit LD I D. ID I D. ID ID <br /> µg/L 609-1257 609-1258 609-1259 609-1260 609-1265 609-1267 <br /> E-7 E8 E-9 E10 BHD1 TB-1 <br /> Purgeable <br /> Hydrocarbons 50 56 2,000 2,800 28,000 4,600 N D <br /> Benzene 050 N D 31 130 2,100 75 N D <br /> Toluene 050 N D N D N D 3,900 55 N D <br /> Ethyl Benzene 050 N D 14 180 600 280 N D <br /> Total Xylenes 050 N D 1 4 46 5,100 160 N D <br /> Chromatogram Pattern Weathered Gasoline Gasoline Gasoline Gasoline <br /> Gasoline C6-C12 C6-C12 C6-C12 C6-C12 <br /> C6-C 12 <br /> Quality Control Data <br /> Report Limrt Multiplication Factor 1 0 2 0 10 100 10 10 <br /> Date Analyzed 10/04/96 10/09/96 10/09/96 10/04/96 10/04/96 10/10/96 <br /> Instrument Identification GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Surrogate Recovery, % 109 98 120 112 118 99 <br /> (QC Limits = 60-140%) <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 /> ?�' 441, <br /> Linda C Schneider <br /> Project Manager/Sacramento Laboratory <br /> 6091247 PES <6> <br />