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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9Z33 <br /> 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)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707) 792-1865 fAX(707)792-0342 <br /> 1 551 Industrial Road San Carlos CA 940704111 (650) 232 9600 FAX(650)232-9612 <br /> sine Tech Services Project Shell(1) Sampled 4115199 <br /> 1680 Rogers Avenue Project Number Shell 2575 Country Club Blvd, Stockton Received 4/16/99 <br /> San Jose,CA 95112 Project Manager Fran Thie Reported 5/6/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUMQuality Control <br /> Sequoia Analytical-San Carlos <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Blank(continuedl 9040112-BLKI <br /> Surrogate a,a a-Trrfluorotoluene 4122199 100 100 u9/1 700-130 100 <br /> LCS 9040112-BSI <br /> Benzene 4/22/99 100 857 ug/l 700-130 85 7 <br /> Toluene 11100 851 11700-130 851 <br /> Ethylbenzene It <br /> 100 850 700-130 850 <br /> Xylenes(total) 300 25 6 700-130 853 <br /> Surrogate a a a-Trrfluorotoluene 100 837 700-130 83 7 <br /> Matrix Spike 9040112-MSI L904185-05 <br /> Benzene 4/22/99 100 ND 9 57 ug/1 600-140 95 7 <br /> Toluene 100 ND 951 600-140 951 <br /> Ethylbenzene 100 ND 954 600-140 954 <br /> Xylenes(total) _ 300 ND 28 5 600-140 950 <br /> rogate a,a,a-Trifluorotoluene 100 829 700-130 82 9 <br /> Matrix Spike Dup 9040112-MSD/ L904185-05 <br /> Benzene 4122/99 100 ND 927 ug/l 600-140 92 7 25 0 3 IS <br /> Toluene 100 ND 926 600-140 92 6 25 0 2 66 <br /> Ethylbenzene 100 ND 920 600-140 920 25 0 3 63 <br /> Xylenes(total) _ )U u v WNJ 1 i Y _ OU 0-14U yY..3 U =eo_ <br /> Surrogate aaa-T afluoi otolrtene 1617 776 " <br /> 700-730 776 <br /> Batch 9040116 Date Prepared 4123/99 Extraction Method EPA 5030E P/T <br /> Blank 9040116-BLK1 <br /> Purgeable Hydrocarbons as Gasoline 4/23/99 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene SID 0 500 <br /> Xylenes(total) It <br /> ND „ 0 500 <br /> Methyl tent-butyl ether 11ND 500 <br /> Surrogate a a,a-Trifluorotoluene 11100 105 700-130 105 <br /> LCS 9040116-BS1 <br /> Purgeable Hydrocarbons as Gasoline 4/23199 250 228 ug/l 700-130 91 2 <br /> Surrogate a,a,a-Trifluorotoluene fe100 8 73 700-130 873 <br /> Matrix Strike 9040116-MSI L904208-14 <br /> Purgeable Hydrocarbons as Gasoline 4/23/99 250 ND 242 ug/1 60 0-140 968 <br /> Surrogate a a,a-Tri luorotoluene 160 911 It700-130 91 1 <br /> Ank <br /> uoia Analytical- San Carlos *Refer to end of report for text of notes and definitions <br /> Page 24 of 32 <br />