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1551 Industrial Road <br /> Sequoia San Carlos CA 94070-4111 <br /> ((,50} 232-9600 <br /> Analytical FAX (650) 232-9612 <br /> i <br /> Gettler-Ryan/Geostrategies(1) Protect Tosco Sampled 3/21/00 <br /> 6747 Sierra Court,Suite D Project Number 6981 Stocton CA/140124 02 Received 3/22/00 <br /> Dublin,CA 94568 Project Manager Scott Polston Reported 3/27/00 <br /> Total Purgeable Hydrocarbons(C6-M),BTEX and MTBE by DHS LUFT/Quahty Control ` <br /> Sequoia Analytical-San Carlos <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> lAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0030118 Date Prepared 3/23/00 Extraction Method EPA 5030E [P/T <br /> Blank 0030118-BLK1 <br /> Purgeable Hydrocarbons as Gasoline 3/23/00 ND ug/l Soo <br /> Benzene ND 110 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND 500 <br /> Surrogate a,a,a-Trifluorotoluene 100 10 6 700430 106 <br /> LCS 0030118-BS1 <br /> Benzene 3/23/00 10 0 10 8 ug/l 700-130 <br /> 10$ <br /> Toluene 100 10 3 700-130 103 <br /> Ethylbenzene 10 0 10 1 700-130 101 <br /> AMWene.,(total) 300 31 0 700-130 103 <br /> rogate a a,a-Trifluorotoluene 10 0 10 2 700-130 102 <br /> LCS 0030118-BSZ <br /> Purgeable Hydrocarbons as Gasoline 3/23/00 250 288 ug/l 700-130 115 <br /> Surrogate a,a,a-Trifluorotoluene it10 0 119 700-130 119 <br /> Matrix Spike 0030118-MS1 L003216-02 <br /> Purgeable Hydrocarbons as Gasoline 3/23/00 250 ND 286 ug/l 600-140 114 <br /> Surrogate a,a,a-Trifluorotoluene If10 0 9.27 700-130 92 7 <br /> Matrix Spike Dup 0030118-MSD1 L003216-02 <br /> Purgeable Hydrocarbons as Gasoline 3/23/00 250 ND 293 ug/l 600-140 117 25 0 2 60 <br /> Surrogate a,a,a-Trifluorotoluene 10 0 11 2 700-130 112 <br /> 0 <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 3 of 4 <br />