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Sequoia680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364.9233 <br /> 404 N.Wiget 1,,ane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> �rIl11 Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 911-9600 FAX(916)921-0100 <br /> 0acrFic Envlronmentaf group, Inc. Client Project ID: Arco 2083,Tracy, CA Sampled: Nov 15, <br /> 11315 Sunrise Gold Circle, #M Sample Matrix: Water Received: Nov 18, 1996:::: <br /> Rancho Cordova, CA 95742 Analysis Method: EPA 5030/8020, DHS Luft Reported: Dec 3, 1996:::: <br /> Attention: Greg Barclay First Sample#: 611-0672 <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 /> pg/L 611-0672 611-0673 611-0674 611-0675 611-0676 611-0677 <br /> ATR-2 ATR-4 ATFL-7 ATR-8 ATR-12 SMW-1 <br /> Purgeable N.D. 440 N.D. 52,000 N.D. 2,500 <br /> Hydrocarbons Reporting Limit: 50 50 50 2,000 50 250 <br /> Benzene N.D. N.D. N.D. 110 N.D. 180 <br /> Reporting Limit: 0.50 0.50 0.50 20 0.50 2.5 <br /> Toluene N.D. N.D. N.D. 130 N.D. N.D. <br /> Reporting Limit: 0.50 0.50 0.50 20 0.50 2.5 <br /> Ethyl Benzene N.D. 0.80 N.D. 240 N.D. 62 <br /> Reporting Limit: 0.50 0.50 0.50 20 0.50 2.5 <br /> Total Xylenes N.D. 2.2 N.D. 1,300 N.D. 21 <br /> Reporting limit: 0.50 0.50 0.50 20 0.50 2.5 <br /> Chromatogram Weathered Weathered Weathered <br /> Pattern: Gasoline Gasoline Gasoline <br /> C6-C12 Ct3-C 12 C6-C12 <br /> Quality Control Data <br /> Date Analyzed: 11/25/96 11/26/96 11/25/96 11/26/96 11/25/96 11/26/96 <br /> Instrument Identification: GCHP-1 GCHP-2 GCHP-1 GCHP-2 GCHP-1 GCHP-2 <br /> Surrogate Recovery, %: 100 122 81 * 100 <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 limit. <br /> "Matrix Interference <br /> SEQUOIA ANALYTICAL, ELAP #1624 <br /> 1,2 <br /> inda C. Schneder <br /> / Project Manager/Sacramento Laboratory <br /> 6110672.P1:5 <1> <br /> r <br />