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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 /> _ lyti cal 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Ana1 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)791-1865 FAX(707)792-0342 <br /> Blaine Technical Services,Inc Project Shell Oil Co Sampled 1/19199 <br /> 1680 Rogers Ave Protect Number 341 E Main,Ripon/990119-J3 Received 1/22/99 <br /> San Jose,CA 95112 Fro ect Manager FranThie Reported 2/2/99 <br /> Total Petroleum Hydrocarbons as Gasollnle4and BTEX by EPA!8015M/8020NUQuality Controlr-" - <br /> ` y r Sequoii Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result' Units Recov Limits % Limit % Notes* <br /> Matrix Spike Dup 9010534-MSD1 P901354-02 <br />=Benzene 100 ND 112 65 0-135-112-20 O-2-71 <br /> Toluene 100 ND 112 650-135 112 20 0 2 71 <br /> Ethylbenzene 100 ND 107 650-135 107 20 0 3 81 <br /> Xylenes(total) 300 ND 331 650-135 110 20 0 276 <br /> Surrogate a,a,a-Triuorotoluene 300 344 650-135 115 <br /> Sequoia Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> Page 6 of 13 <br />