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Sequoia 680 Chesapeake Drive Re00 Redwood City CA 94063 (650) 364 96FAX(650)364 9233 <br /> f <br /> 404 N W get Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> l 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> �iva Analyticar / <br /> larown & Caldwell Client Project 1D ARCO 02133 Stockton CA Sampled Nov 25 1997 <br /> 9616 Micron Ave , Suite 600 Sample Matrix Water Received Nov 26, 1997 <br /> Sacramento, CA 95827 Analysis Method EPA 5030/8020, DHS Luft Reported Dec 12, 1997 <br /> Attention Steve Misner First Sample # 711-1534 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Sample Sample Sample Sample <br /> Analyte Units Results Results Results Results Results Results <br /> ,ug/L 711-1534 711-1535 711-1536 711-1537 711-1538 711-1539 <br /> PR-1 <br /> MVS 4 E-y E 1 J E2 EJ <br /> Purgeable N D N D N D N D 280 140 <br /> Hydrocarbons Reporting Limit 50 50 50 50 50 50 <br /> Benzene ND ND ND ND ND ND <br /> Reporting Limit 050 050 050 050 050 050 <br /> Toluene ND ND ND ND ND ND <br /> Reporting Limit 050 050 050 050 050 050 <br /> Ethyl Benzene N D N D N D N D 085 N D <br /> Reporting Limit 050 050 050 050 050 050 <br /> *Total Xylenes N D N D N D N D N D N D <br /> Reporting Limit 050 050 050 050 050 050 <br /> Chromatogram - Unidentified - <br /> Pattern Hydrocarbons <br /> C6 C12 <br /> Quality Control Data <br /> Date Analyzed 12/04/97 12/04/97 12/04/97 12/04/97 12/04/97 12/04/97 <br /> Instrument Identification GCHP-1 GCHP-1 GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> Surrogate Recovery % 98 100 101 101 90 92 <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 /> SEQUO ANALYTICA ELAP #1624 <br /> ff�fQ Lf�� <br /> nda C Schneider <br /> roject Manager/Sacramento Laboratory <br /> 7111534 BRS <11> <br />