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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 /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Roy F Weston Client Project Ib SJCHSA Sampled Jul 25, 1995 <br /> 2300 Clayton Rd , Suite 1580 Sample Matrix Water Received Jul 27, 1995 <br /> Concord, CA 94520-2148 Analysis Method EPA 5030/8015/8020 Reported Aug 10, 1995 <br /> Attention David Marks First Sample# 507-1394 <br />' TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br />' Reporting Sample Sample Sample <br /> Analyte Limit I.D. I D I.D. <br /> ug/L 507-1394 507-1395 507-1396 <br />' MW-2A MW-8 MW-11 <br /> urgea e <br /> Hydrocarbons 50 68,000 820 N D <br /> Benzene 050 5,700 059 N D <br /> tToluene 050 2,800 N D N D <br />' Ethyl Benzene 0 50 3,200 N D N D <br />' Total Xylenes 050 9,400 N D N D <br /> I <br />' Chromatogram Pattern Gasoline Unidentified -- <br /> 06-C12 Hydrocarbons <br /> C6-C8 <br /> 1 <br /> Quality Control Data ' <br />' Report Limit Multiplication Factor 200 10 10 <br /> Date Analyzed 8/7/95 8/7/95 8/8/95 <br />' Instrument Identification GCHP-2 GCHP-2 GCHP-2 <br /> Surrogate Recovery, % 89 * 106 <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 /> P #}-1624 *Matrix interference <br /> Linda C c neider <br /> Project Manager <br /> 5071388 ROY <2> <br /> 1 <br />