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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wlget 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)921 OIOo <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 /> Blaine Tech Services Project Shel](l) Sampled 2123/99 <br /> 1680 Rogers Avenue Project Number Shell 7910 Lower Sac,990223-Y2 Received 2/26/99 <br /> San Jose, CA 95112 Project Manager Fran Thte ReP2rted 3/12199 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> I ; ' `Segnbta,Analytical-San Carlos, - R , <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Lnnit % Notes* <br /> Batch 9030015 Date Prepared* 313_/99 Extraction Method EPA 5030B [P/T1 <br /> Blank 9030015-SLK/ <br /> Purgeable Hydrocarbons as Gasoline 313199 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND 500 <br /> Surrogate a a a-Triuorotoluene 100 936 700-130 93 6 <br /> LCS 9430015-BSI <br /> Benzene 313/99 ]0 0 102 ug/l 700-130 102 <br /> Toluene 100 9 89 700-130 98 9 <br /> Ethylbenzene 10 0 9 94 700-130 99 4 <br /> lenes(total) _ __" ___ 300_ _ 300 " 700-130 100 <br /> iogate aaa-D i luoiotoluene 10 0 959 700-130 95 9 <br /> Matrix 5 ike 9030015-MS1 L902019-01 <br /> Benzene 3/3/99 100 ND 992 ug/l 600-140 992 <br /> T oluLnc 10 0 ND 9 68 600-140 968 <br /> Ethylbenzene 10 0 ND 972 600-140 97 2 <br /> Xylenes(total) 30 0 _- ND299 _60_0-140 99 3 <br /> Surrogate aaa-Trifluoiotoluene 100 898 700-130 898 <br /> Matrix Spike Dup 9030015-MSD1 L902019-01 <br /> Benzene 313/99 10 0 ND 103 ug/l 600-140 103 25 0 376 <br /> Toluene 10 0 ND 9 99 11600-140 999 25 0 3 15 <br /> Ethylbenzene l0 0 ND 102 600-140 102 25 0 482 <br /> Xylenes(total) 30 0 ND 307 60 0-140 102 25 0 2 68 <br /> Surrogate aaa-Trtfluoi otoluene 10 0 843 700-130 84 3 <br /> Q <br /> uoin Analy tical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 4 of 5 <br />