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Sequoia680 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 /> Analytical <br /> � �aii 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ane Technical Services,Inc Project Shell Oil Co Sampled 1128199 <br /> 1680 Rogers Ave Project Number 341 E Main St,Ripon/990128-J3 Received 212199 <br /> San Jose,CA 95112 Project Manager Fran Thie Reported 2118199 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 801.5NV8020WQuality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Linut Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9020260 Date Prepared 2/11199 Extraction Method EPA 5030 waters <br /> Blank 9020260-BLKI <br /> Gasoline 2111199 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 /> Methyl tert-butyl ether ND 200 <br /> Surrogate a,a,a-Triuorotoluene 300 279 650-135 93 0 <br /> Surrogate 4-Bromofluorobenzene 300 284 650-135 947 <br /> LCS 9020260-BS1 <br /> Gasoline 2/11/99 1000 1100 ug/l 650-135 110 <br /> Surrogate 4-Bromofluorobenzene It 300 297 IF 650-135 99 0 <br /> atnx S ike 9020260-MSI P902048-01 <br /> ohne 2/11/99 1000 716 1060 ug/l 650-135 988 <br /> 'qgrrogate 4-Bromofluorobenzene 300 293 650-135 977 <br /> Matrix Spike Dup 9020260-MSD1 P902048-01 <br /> Gasoline 2/11/99 1000 71 6 1050 ug/l 650-135 978 200 102 <br /> Surrogate 4-Bromofluorobenzene 300 301 to 650-135 100 <br /> �Y <br /> uoia Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> Page 4 of 6 <br />