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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 /> q% „ F Analytical 119 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 fAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)79Z-0342 <br /> • <br /> SECOR International Project ARCO 2093,Tracy,CA Sampled 2/2/99 <br /> 9912 Business Park Drive,Ste 100 Project Number N/A Received 2/3/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 2/17/99 <br /> Total Purgeable Hydrocarbons (C6-Cl2) and BTEX in Air by DHS LUkT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Anal zed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch, 9020043 D te Prepared. 2/3/99 Extraction Method, EPA U30B(Pa) <br /> Blank 9020043-131,K1 <br /> Purgeable Hydrocarbons 2/3/99 ND ppmv 2 80 <br /> Benzene ND 00160 <br /> Toluene ND 00130 <br /> Ethylbenzene ND 00120 <br /> Xylenes(total) ND 00120 <br /> Methyl tert-butyl ether ND 0 140 <br /> Surrogate a a a-Prrfuorotoluene 000200 000216 600-140 /08 <br /> equoia Analytical -Sacramento *Refer to end of report for text of notes and defintttons <br /> .J <br /> andra R Hanson,Client Services Representative page 5 of 6 <br />