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680 Chesapeake Drive Redwood City CA 94063 1650)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)92 1-0100 <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 /> Pacific Environmental Group-Sac Project Chevron, 1001621 Banta CA Sampled 2/23/99 <br /> 11315 Sunrise Gold Circle St M Project Number 920 002 2D Received 2/26/99 <br /> Rancho Cordova,CA 95742 Project Manager Chris Brown Reported 3/12/99 <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 /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch,9030922 Date Prepared`312/99 Extraction Method, EPA 50-IOB(PCQ <br /> Blank <br /> Purgeable Hydrocarbons 3/2/99 ND ug/1 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND " 0 500 <br /> Surrogate a,a,a-Tizfluorotoluene 100 981 600-140 981 <br /> ILS 9030029-BS1 <br /> Benzene 3/2199 too 929 ug/1 700-130 92 9 <br /> Toluene 10 0 9 35 700-130 935 <br /> Ethylbenzene 100 9 26 700-130 92 6 <br /> Xidenes(total) 300 28 3 700-130 94 3 <br /> ate a a a-Trifluorotoluene 100 938 600-140 93 8 <br /> Matrix Spike 9030029-MS1 1;902329-08 <br /> Benzene 3/2199 10 0 ND 950 ug/I 600-140 95 0 <br /> Toluene 10 0 ND 9 65 600-140 96 5 <br /> Ethylbenzene 100 ND 956 600-140 95 6 <br /> Xylenes(total) 300 ND 288 600-140 960 <br /> Surrogate a,a a-Trifluorotoluene 100 854 600-140 85 4 <br /> Matrix Spike Dup 9030029-MSDI S992322-0$ <br /> Benzene 3/2/99 100 ND 9 14 ug/1 600-140 914 25 0 386 <br /> Toluene too ND 930 600-140 93 0 250 369 <br /> Ethylbenzene 10 0 ND 925 'I 600-140 92 5 25 0 330 <br /> Xylenes(total) 300 ND 280 600-140 93 3 25 0 285 <br /> Surrogate a a,a-Tnfluorotoluene IO 0 9 56 600-140 956 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> ` r <br /> Sandra R Hanson,Client Services Representative Page 10 of 17 <br />