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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (51o) 988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> ._.. <br /> IViCiN "' '' "' Clilsnt Protect ID: o 2186, Stockton, CA Sampied: Feb i7, 1998 <br /> Arc <br /> 1433 N. Market Blvd. Sample Matrix: Water Received: Feb 18, 1998:.,: <br /> Sacramento, CA 95834 Analysis Method: EPA 5030/8020, DHS Luft Reported: Mar 4, 1998:;; <br /> Attention: Dave Foley First Sample #: 802-0465 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Sample Sample Sample <br /> Analyte Units Results Results Results Results Results <br /> pg/L 802-0465 802-0466 802-0467 802-0468 802-0469 <br /> MW-1 (75.4) MW-2(75.2) MW-3(74.7) VW-3(61.2) MW-4(62.8) <br /> Purgeable 19,000 N.D. N.D. 93 180 <br /> Hydrocarbons Reporting Limit: 1,000 50 50 50 50 <br /> Benzene 680 N.D. N.D. N.D. 0.57 <br /> Reporting limit: 10 0.50 0.50 0.50 0.50 <br /> Toluene 990 N.D. N.D. N.D. N.D. <br /> Reporting Limit: 10 0.50 0.50 0.50 0.50 <br /> Ethyl Benzene 980 N.D. N.D. N.D. N.D. <br /> Reporting Limit: 10 0.50 0.50 0.50 0.50 <br /> • Total Xylenes 3,200 N.D. N.D. N.D. 0.59 <br /> Reporting Limit: 10 0.50 0.50 0.50 0.50 <br /> Chromatogram Gasoline -- -- Weathered Weathered <br /> Pattern: C6-C12 Gasoline Gasoline <br /> C6-C12 C6-C12 <br /> Quality Control Data <br /> Date Analyzed: 02/23/98 02/23/98 02/23/98 02/23/98 02/23/98 <br /> Instrument Identification: GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Surrogate Recovery, %: 92 99 89 94 90 <br /> (OC Limits = 60-140%) <br /> Purgeabie Hydrocarbons are quantitated against a trash gasoline standard. <br /> Analytes reported as N.D.were not detected at or above the reporting limit. <br /> This page amended March 25, 1998. <br /> . SEQUOIA ANALYTICAL, ELAP #1624 <br /> Ronald W. Bobel <br /> Project Manager/Sacramento Laboratory <br /> 8020465.EMC ¢1> <br />