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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(9 16)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)232-9612 <br /> SECOR International Project Chevron 9-6258,Stockton,CA Sampled 4/7/99 <br /> 9912 Business Park Drive,Ste 100 Project Number 7GO07-018-01 Received 4/8/99 <br /> Sacramento,CA 95827 Project Manager Roger Hoffmore Re rted 4/14199 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> IAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch. 9040120 [late Prepared._4112199 Extraction Method, EPA 5030B(P/T) <br /> Blank 9040120-BLK1 <br /> Purgeable Hydrocarbons 4112199 ND mg/kg 1 00 <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> Ethylberizene ND 000500 <br /> Xylenes(total) ND 000500 <br /> Surrogate a a a-Trifluorotoluene 0200 0 194 600-140 970 <br /> CS 9040120-BSI <br /> Benzene 4112199 0200 0204 mg/kg 700-130 102 <br /> Toluene 0200 0 219 700-130 109 <br /> Ethylbenzene 0 200 0 219 700-130 109 <br /> Xylenes(total) 0 600 0 590 700-130 983 <br /> Surrogate a,a a-Tri luorotoluene 0200 0 199 600-140 995 <br /> OMAtrixLSpike 9040120-MS1 S904045-Dfi <br /> Benzene 4/12/99 0200 ND 0 147 mg/kg 600-140 73 5 <br /> Toluene 0200 ND 0 161 600-140 805 <br /> Ethylbenzene 0200 ND 0 161 600-140 805 <br /> Xylenes(total) 0 600 ND 0 456 600-140 760 <br /> Surrogate a a a-Trrfluorotoluene 0200 0 190 600-140 95 0 <br /> Matrix Spike D M 9040120-MSD/ 5204045-06 <br /> Benzene 1112/99 0200 ND 0 146 mg/kg 600-140 73 0 25 0 0 68' <br /> Toluene 0200 ND 0 165 600-140 82 5 25 0 245 <br /> Ethylbenzenc 0200 ND 0 162 600-140 810 25 0 0 619 <br /> Xylenes(total) 0 600 ND 0 455 600-140 75 8 25 0 0 264 <br /> Surrogate a,a a-Trrfluorotoluene 0200 0 194 600-140 970 <br /> *:equoia Analytical-SaL.amento *Refer to end ofrepurt for,ext of notes and definitions� <br /> Sandra R Hanson,Client Services Representative ,Q Page 3 of 4 <br />