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Sequoia 680 Chesapeake Dnve Redwood Ciry CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N eget imine Walnut Creek CA 94598 (510) 988 9600 FAX(510)988-9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> wn & Caldwell Client Project ID ARCO 02133, Stockton, CA Sampled Jun 5, 1997 <br /> 616 Micron Ave , Suite 600 Sample Matrix Water Received Jun 5, 1997 <br /> Sacramento, CA 95827 Analysis Method EPA 5030/8020, DHS Luft Reported Jun 18, 1997 <br /> Attention Steve Misner First Sample# 706-0192 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Sample Sample <br /> Analyte Units Results Results Results Results <br /> Mg/L. 706-0192 706-0193 706-0194 706-0195 <br /> MW-5 �E� E-i0 BhIQ-1 <br /> Purgeable 1,900 N D 100 3,500 <br /> Hydrocarbons Reporting Limit 100 50 50 250 <br /> Benzene 22 N D 28 39 <br /> Reporting Limit 10 050 050 25 <br /> Toluene 51 N D N D 30 <br /> Reporting Limit 10 050 050 25 <br /> Ethyl Benzene 40 N D N D 76 <br /> Reporting Lima 10 050 050 25 <br /> .Total Xylenes 14 N D 20 12 <br /> Reporting Limit 10 050 050 25 <br /> Chromatogram Gasoline -- Weathered Weathered <br /> Pattern C6-C12 Gasoline Gasoline <br /> Cs C12 C6-C12 <br /> Quality Control Data <br /> Date Analyzed 06/17/97 06/16/97 06/16/97 06/17/97 <br /> Instrument Identification GCHP-7 GCHP-7 GCHP-7 GCHP-7 <br /> Surrogate Recovery, % 127 82 85 81 <br /> (OC Limits = 60-140%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were riot detected at or above the reporting limit <br /> SEQUOIA ANALYTICAL, ELAP #1624 <br /> *)ANA, M Pf UX(AW <br /> Edana M Fruciano <br /> Project Manager/Sacramento Laboratory <br /> 7060188 BRS a2> <br />