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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> ` <br /> Sequoia a 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988 9673 <br /> 819 Striker Avenue Suwte 8 Sacramento CA 95834 (916)921 9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792 1865 FAX(707)792-0342 <br /> • 1551 Industrial Road San Carlos CA 94070 4111 (650)232 9600 FAX(650)232-961 Z <br /> Gettler-Ryan-Sac Project Tosco#6981,Stockton,CA Sampled 5/26199 <br /> 3164 Gold Camp Dr, Ste 240 Project Number 240124 03 Received 5/26/99 <br /> Rancho Cordova,CA 95670 Pro ect Manager Steve Carter Reported 6/8/99 <br /> Total Purgeable Hydrocarbons(C6-C12) and BT)EX in Air(ppmv) by DHS LUFT/Quality 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, 9060034 Date Preparrd. 5128122 Extraction Method, EPA 5030E(MeOH) <br /> Biank 9060034-BLKI <br /> Purgeable Hydrocarbons 5/28/99 ND ppmv 280 <br /> Benzene ND 00160 <br /> Toluene ND 00130 <br /> Ethylbenzene ND 00120 <br /> Xylenes(total) ND 00120 <br /> Surrogate a a a-Ti ifluorotoluene 000200 000199 600-140 995 <br /> Sequoia Analytical-Sacramento *Refer to end ofreport for teri ofriotes and definitions <br /> �2 /�-, <br /> -� <br /> Sandra R FrAson,Client Services Representative ,p� Page 9 of 10 <br />