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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 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 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 It (650)232-9600 FAX(650)232-9612 <br /> Emcon -Cameron Park Project ARCO 6020 Manteca,Ca Sampled 612199 <br /> 3939 Cambridge Road, Ste 202 Project Number NIA Received 612199 <br /> Cameron Park,CA 95682 Project Manager Joel Coffman Reported 613199 e <br /> Total Purgeable Hydrocarbons(C6-C12) and BTEX by DHS LUFTIQuality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD ' <br /> Analyte - _ Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch, 90654 Date Prepared. 613199 Extraction Method, EPA 5030B(MeOH) ' <br /> Blank 9060054-BLK1 <br /> Purgeable Hydrocarbons 613199 ND mg/kg 1 00 <br /> Benzene ND 000500 ' <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Xylenes(total) ND 000500 ' <br /> Surrogate a a a-Trifluorotoluene 0200 0 168 600-140 840 <br /> LICS 9060054-BS1 <br /> Benzene 613199 0200 0207 mg/kg 700-130 103 <br /> Toluene _ 0200 0 214 700-130 107 <br /> Ethylbenzene 0200 0 212 700-130 106 <br />�—Xylenes(total) 0 600 0 638 700-130 106 <br /> Surrogate a a a-Tnfluorotoluene 0200 0 174 600-140 870 <br /> 1 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Ronald W Bobel,Client Services Leprescritaflve Page 4 of 6 , <br />