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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)364-9213 <br /> 404 N. Wiget Lane Walnut Creek,CA 94598 (50) 988-9600 FAX(510)98a-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 921-9600 FAX(916)92 1-0 100 <br /> "'A 20, 11997' <br /> EMCON Cfient Project iD: ARMC)2186, Stockton, G ampled: Nov <br /> 1433 N. Market Blvd. Sample Matrix: Water Received: Nov 21, 1997"" <br /> Sacramento, CA 95834 Analysis Method: EPA 5030/8020, OHS Luft Reported: Dec 10, 1997:;' <br /> Attention: Deanna Santos First Sample #: 711-1280 <br /> . ............... <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Sample Sample Sample <br /> Analyte Units Results Results Resuits Results Results <br /> jug/L 711-1280 711-1281 711-1282 711-1283 711-1284 <br /> MW-1 (50) MW-2 (50) MW-3(50) VW-30 (50) MW-4(50) <br /> Purgeable 24,000 N.D. N.D. 160 89 <br /> Hydrocarbons Reporting Limit: 10,000 50 50 50 50 <br /> Benzene 830 N.D. N.D. 4.6 1.0 <br /> Reporting Limit: 100 0.50 0.50 0.50 0.50 <br /> Toluene 1,900 N.D. N.D. 4.4 1.1 <br /> Reporting Limit: 100 0.50 0.50 0.50 0.50 <br /> Ethyl Benzene 1,100 N.D. N.D. 2.6 0.63 <br /> Reporting Limit: 100 0.50 0.50 0.50 0.50 <br /> Total Xylenes 3,600 N.D. N.D. 6.7 2.0 <br /> Reporting limit: 100 0.50 0.50 0.50 0.50 <br /> Chromatogram Weathered Weathered <br /> Pattern: Gasoline Gasoline <br /> C6-C12 C&C 12 <br /> Quality Control Data <br /> Date Analyzed: 35,765 12/01/97 12/01/97 12/01/97 12/01/97 <br /> Instrument Identification: GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Surrogate Recovery, %: 93 92 93 88 90 <br /> (0C Limits = 60-140%) <br /> Purgeabie Hydrocarbons are quantitated against afresh gasoline standard. <br /> Analytes reported as N.D.were not detected at or above the reporting limit. <br /> SEQUOIA ANALYTICELAP #1624 <br /> da C. Schne" er <br /> r j <br /> I c <br /> oJect Manager/Sacramento Laboratory <br /> 7111280.EMC <1> <br />