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3 <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510) 988 9673 <br /> ,%Qr Analytical 819 Strrker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> 0 <br /> EMCOESac Project Arco 2168,Stockton,CA <br /> 1433 Nd Sampled =5/22/98 <br /> /22/98Project Number 2231200Received Sacram834 Project Manager Dave Foley <br /> Reported <br /> Notes and Definitions <br /> # Note <br /> 1 Chromatogram Pattem Weathered Gasoline C6-C12 <br /> 2 Dilution required due to high level of hydrocarbon interference <br /> 3 Dilution required due to high level of hydrocarbon interference i <br /> 4 Surrogate elevated due to benzene interference <br /> 5 Surrogate elevated due to matrix interference <br /> 5 RPD exceeded due to the presence of hydrocarbon interferences <br /> 7 Surrogate elevated due to hydrocarbon interference <br /> 3 RPD elevated due to hydrocarbon interference <br /> Analyte DETECTED <br /> JD Analyte NOT DETECTED at or above the reporting limit <br />!R Not Reported <br /> ry Sample results reported on a dry weight basis <br /> ecov Recovery <br /> PD Relative Percent Difference <br /> 0 <br /> luota Analytical -Sacramento <br /> iald W Bobel,Client Services Representative <br /> Page 10 of 10 <br />