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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <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 /> Blaine Tech/Chevron Project Chevron Sampled 3/5/99 <br /> 1680 Rogers Ave Project Number 9-8264/990305-J3 Received 3/10/99 <br /> San Jose,CA 95112 Project Manager Chnstine Lillie Reported 4/5/99 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9030446 Date Prepared_ 3118199 Extraction Method EPA 5030 waters <br /> Blank 9030446-BLK1 <br /> Gasoline 3118/99 ND ug/l Soo <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 2 00 _ <br /> Surrogate aaa-Trrfluorotoluene 300 184 650-135 94 7 <br /> Surrogate 4-Bromofluorobenzene 300 306 650-1,35 102 <br /> Blank 9030446-BLK2 <br /> Gasoline 3119/99 ND ug/l 50 0 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methvl tert-butyl ether _ _ _ ND _ 200 _ <br /> Surrogate aaa-Trrfluorotoluene 300 176 650-135 92 0 <br /> Surrogate 4-Bromofluorobenzene 300 294 650-135 98 0 <br /> LCS 9030446-BSI <br /> Gasoline _ 3/18199 1000 991 ug/1_ _ 65 0-135 99 1 <br /> Surrogate 4-Bromofluorobenzene T J 300 301 650-135 100 <br /> LCS 9030446-BS2 <br /> Gasoline _ 3/19/99 _ 1000 1090 ug/l _65 0-135 _109 <br /> Surrogate 4-Bromofluorobenzene 11 300 rn 304 - 650-135 101 <br /> Matrix Spike 9030446-MSl P903201-17 <br /> Gasoline _ _ 3/18_/99 __1000 16.6 1100 ugil 65 0-1_35 93 4 <br /> Surrogate 4-Bromofluorobenzene 11300 306 650-135 102 <br /> Matrix_Spike Du p 9030446-MSDI P903201-17 <br /> Gasoline _ _ _ 3/18199 1000 166 1080 ug/l 6_5 0-135 91 4 200 2 16 <br /> Surrogate 4-Bromofluorobenzene 300 289 65 0-135 963 <br /> lift <br />-Sequoia Analytical - Petaluma *Refer to end of r epon for ter/of holes and defrnrtzons <br /> Page 10 of 23 <br />