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660 Chesapeake Drive Redwood City CA 94063 (650)3649600 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 1916)921-0 100 <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 1650)232-9612 <br /> Getticr-Ryan- Sac Project Tosco#6981, Stockton,CA Sampled 5126/99 <br /> 3164 Gold Camp Dr,Ste 240 Project Number 240124 03 Received 5126199 <br /> Rancho Cordova,CA 95670 Project Manager Steve Carter Reported 6/8/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE to Air 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 Prepared, 5128199 Extraction Method. EPA 5030E(MeQHl <br /> Blank 9060034-BLKI <br /> Purgeable Hydrocarbons 5/28/99 ND mglm'Air 100 <br /> Benzene ND 00500 <br /> Toluene ND 00500 <br /> Ethylbenzene ND 00500 <br /> Xylenes(total) ND 00500 <br /> Methyl tert-butyl ether ND 0 500 <br /> Surrogate a,a a-Trifluorotoluene 2 00 1 99 600-140 995 <br /> IJU 9060034-BSI <br /> Benzene 5/28/99 200 1 77 mg/m'Air 700-130 88 5 <br /> Toluene 200 1 85 700-130 925 <br /> thylbenzene 200 1 88 700-130 940 <br /> lenes(total) 600 5 13 700-130 85 5 <br /> ethyl tent-butyl ether 200 1 90 700-130 950 <br /> Surrogate a,a,a-Trifluorotoluene 2 00 1 95 600-140 975 <br /> LCS Dun 9060034-BSD1 <br /> Benzene 5128/99 200 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 0 345 <br /> Methyl tert-butyl ether 200 1 97 700-130 985 25 0 362 <br /> Surrogate a s a-Trifluorotoluene 2 00 199 600-140 995 <br /> 10 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Z2—�") <br /> Sandra R Hanson,Client Services Representative Page 6 of 10 <br />