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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988 9673 <br /> 819 Stnker Avenue Swte 8 Sacramento CA 95834 (916)921-9600 FAX(916)92 1-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792-1665 FAX(707) 792 0342 <br /> 1551 Industrial Road San Carlos CA 94070-41 1 l (650) 232-9600 FAX(650) 232 9612 <br /> 10 <br /> SECOR International Project ARCO 2133, Stockton,CA Sampled 3118199 <br /> 9912 Business Park Drive,Ste 100 Project Number 7G600-019-04 Received 3118/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 4/l/99 <br /> Notes and Definitions <br /> # Note <br /> D Data reported from a dilution <br /> 1 Chromatogram Pattern Weathered Gasoline C6-C12 <br /> 2 The spike recovery for this QC sample is outside of established control limits due to sample matrix interference <br /> 3 The RPD and/or percent recovery for this QC spike sample cannot be accurately calculated due to the high concentration of analyte <br /> already present In the sample <br /> 4 Analyses are not controlled on matrix spike RPD and/or percent recoveries when the:sample concentration is significantly higher <br /> than the spike level <br /> DET Analyte DETECTED <br /> ND Analyte NOT DETECTED at or above the reporting limit <br /> 0 Not Reported <br /> dry Sample results reported on a dry weight basis <br /> Recov Recovery <br /> RPD Relative Percent Difference <br /> Quoia Analytical - Sacramento <br /> V <br /> andra R Hanson,Client Services Representative Page l 1 of I 1 <br />