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P <br /> Sequoia 680 Chesapeake Drive tiedwood City CA 94063 (415) 364 9600 FAX(415) 364 9333 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 9 Sacramento CA 95834 (916) 931 9600 FAX (916)921 0100 <br /> EMCON Associates <br /> Client Project 1D Arco #6100, Tracy, CA Sampled Jun 26, 1995 <br /> 1433 N Market Blvd Sample Matrix Sod Received Jun 27, 1995 <br /> Sacramento, CA 95834 Analysis Method EPA 5030/8015/8020 Reported Jul 7, 1995 <br /> Attention Claudio Avila First Sample# 506-1537 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample <br /> Analyte Umrt I D. I.D. I D. I D <br /> mg/kg 506-1537 506-1538 506-1539 506-1540 <br /> VW-18(21 5) VW-18(46 5) VW-18 (61) VW-18(76) <br /> urges e <br /> Hydrocarbons 10 N D N D 16 N D <br /> Benzene 00050 N D N D 026 N D <br /> Toluene 00050 N D N D 1 1 N D <br /> Ethyl Benzene 00050 N D N D 035 N D <br /> Total Xylenes 00050 N D N D 2 3 N D <br /> Chromatogram Pattern -- Gasoline <br /> C6-C 12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 10 2 0 10 <br /> Date Analyzed 7/6/95 7/6/95 7/6/95 7/6/95 <br /> Instrument Identification GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> Surrogate Recovery, % 82 83 90 85 <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 /> 7roLPSEQUOIA ANALYTICAL, ELAP#1624 <br /> da C Schneider <br /> jectt Manager <br /> 5061537 EMC ¢1 n <br />