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Sequoia680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wrget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytiea1 819 Sinker Avenue Stnte 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> EMCON Client Project ID ARCO 2130, Stockton, CA Sampled Nov 19 1997 <br /> 1433 N Market Blvd Sample Matrix Water Received Nov 21, 1997 <br /> Sacramento, CA 95834 Analysis Method EPA 5030/8020, DHS Luft Reported Dec 10, 1997 <br /> Attention Deanna Santos First Sample # 711-1287 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Sample Sample Sample <br /> Analyte Units Results Results Results Results Resuits <br /> µg/L 711-1287 711-1288 711-1289 711-1290 711-1291 <br /> MW-3(49) MW-4(48) MW-5(48) MW-6(48) MW-7 (48) <br /> i u.nn i u• i nin ir_mrirm.nn�..i <br /> Purgeable N D N D N D 95 N D <br /> Hydrocarbons Reporting Limit 50 50 50 50 50 <br /> Benzene 1 3 11 12 34 26 <br /> Reporting Lima 050 050 050 050 050 <br /> Toluene 1 1 068 094 21 29 <br /> Reporting Limit 050 050 050 050 050 <br /> Ethyl Benzene N D N D N D 1 0 080 <br /> Reporting Limit 050 050 050 050 050 <br /> y Total Xylenes 083 054 091 25 45 <br /> Reporting Limit 050 050 050 050 050 <br /> Chromatogram - Weathered - <br /> Pattern Gasoline <br /> C6-C12 <br /> Quality Control Data <br /> Date Analyzed 12/02/97 12/02/97 12/02/97 12/02/97 12/02/97 <br /> Instrument Identification GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Surrogate Recovery, % 94 96 95 109 95 <br /> (OC 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 hmrt <br /> SED IA ANALYT[ L, ELAP #1624 <br /> Inda C Schneider <br /> Project Manager/Sacramento Laboratory <br /> 7111285 EMC <2> <br />