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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-96W FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-96W FAX(925)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(9 16)921-0 100 <br /> Analytical <br /> ��� 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX{707)792-0342 <br /> H 1 1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX 1650)232 9612 <br /> Gettler-Ryan- Sac Project Tosco#6981,Stockton,CA Sampled 5126199 <br /> 3164 Gold Camp Dr,Ste 240 Project Number 240124 03 Received 5/26/99 <br /> Rancho Cordova,CA 95670 Project Manager Steve Carter Reported 6/8199 <br /> Total Purgeable Hydrocarbons(C6-C12)and BTEX 1n Air by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> �Ana]Xtc Analyzed Level Result Result Units Recov Limits % Limit % Notes, <br /> Batch, 9060034 Extraction Method, EPA 5030B(MeQU) <br /> Blank(continued) 9060034-BLKI <br /> Purgeabie Hydrocarbons 5128199 ND mg/m'Air 100 <br /> Benzene ND 00500 <br /> Toluene ND 00500 <br /> Ethylbenzene ND 00500 <br /> Xylenes(total) ND 00500 <br /> Surrogate a a a-Tri�luorotoluene 200 199 600-140 995 <br /> LSs 200034-USI <br /> Benzene 5/28199 200 1 77 mg/m'Air 700-130 88 5 <br /> Toluene 200 1 85 700-130 925 <br /> Ethylbenzene 200 l 88 700-130 940 <br /> Wylenes(total) 600 5 13 700-130 85 5 <br /> 'gate a a,a-Trifluorotoluene 200 19.5 600-140 975 <br /> LCS Dun 9060034-BSDI <br /> Benzene 5128199 200 1 84 mg/m'Air 700-130 920 25 0 3 88 <br /> Toluene 200 1 94 700-130 970 25 0 4 75 <br /> Ethylbenzene 200 1 95 700-130 975 25 0 366 <br /> Xylenes(total) 600 5 31 700-130 885 25 0 3 45 <br /> Surrogate aaa-Trlfluorotoluene 2 00 199 600-140 995 <br /> 0 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and defnrtions <br /> Sandra R Hanson,Client Services Representative Page 8 of 10 <br />