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Sequoia 680 Chesapeake Dnvt 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 Sinker Avenue Suite 8 Sacramento CA 95834 (9t6) 921 9600 FAX(916) 921 0100 <br /> Grown & Caldwell Client Project ID ARCO 02133, Stockton, CA Sampled Aug 19, 1997 <br /> 9616 Micron Ave , Suite 600 Sample Matrix Water Received Aug 20, 1997 <br /> Sacramento, CA 95827 Analysis Method EPA 5030/8020, DHS Luft Reported Sep 4, 1997 <br /> Attention Steve Misner First Sample # 708-0752 <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 /> erg/L 708- 752 708-0753 708-0754 708-0755 708-0756 70 <br /> P -1 PR 2 BHb- MW 3 E-12 <br /> Purgeable N D N D N D N D N D N D <br /> Hydrocarbons Reporting Limit 50 50 50 50 5o 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 N D 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 - - - <br /> Pattern <br /> Quality Control Data <br /> Date Analyzed 08/25/97 08/25/97 08/25/97 08/26/97 08/26/97 08/26/97 <br /> Instrument Identification GCHP-7 GCHP-7 GCHP-7 GCHP-7 GCHP-7 GCHP-7 <br /> Surrogate Recovery, % 99 95 94 90 88 89 <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 /> SEQUOIAANALYTI L, ELAP/#_1624 <br /> t da C Schneider <br /> Project Manager/Sacramento Laboratory <br /> 7080752 BRS <1> <br />