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36A <br /> Sequoia 680 Chesapeake Drive Redwood City A 4598 (650)364-9600 FAX(925)988-9673 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical <br /> 8t9 Striker Avenue Suite 8 Sacramento CA 95834 (915)921-9600 FAX(916)921-0I00 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Technical Services,Inc Project Shell Oil Co Sampled 1/26/99 <br /> 1680 Rogers Ave Project Number 141 N El Dorado,Stockton/990126-S2 Received 2/2/99 <br /> San Jose,CA 95112 Pra ect Manager Fran Thie Reported 2/12/99 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M18020WQuahty Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Lirruts % Limit % Notes* <br /> Batch 9020174 Date Prepared 2/8/99 Extraction Method EPA 5030 waters <br /> Blank 9020174-BLK1 <br /> Gasoline 2/8/99 ND ug/I 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 200 <br /> Surrogate a,a,a-Trifluorotoluene 300 313 650-135 104 <br /> Surrogate 4-Bromofluorobenzene 300 282 650-135 94 0 <br /> LCS 9020174-BSI <br /> Gasoline 2/8/99 1000 977 ug/I 65 0-135 977 <br /> Surrogate 4-Bromofluorobenzene " 300 285 650-135 95 0 <br /> Matnx Spike 9020174-MSI P902071-01 <br /> Gasoline 2/8/99 1000 88 4 941 ug/1 650-135 853 <br /> Surrogate 4-Bromofluorobenzene It300 271 If650-135 903 <br /> Matrix Spike Dup 9020174-MSD1 P902071-01 <br />�Gasohne 2/8/99 1000,88 4�959_—__.ug/1�65 0,135=87 1 20 0�2 04 <br /> Surrogate 4-Bromofluorobenzene 300 278 650-135 92 7 <br /> Sequoia Analytical-Petaluma *Refer to end of report for text of notes and defrniti <br /> Page 6 of 10 <br />