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Sequoia Industrial Road <br /> San Carlos, <br /> CA 94070-4111 <br /> � Analytical (650)232-9600 <br /> FAX(650)232-9612 <br /> 7 <br /> Sequoia-Walnut Creek Project: Gettler-Ryan Inc./TOSCO Sampled: 8111/99 <br /> 404 N.Wigett Lane Project Number: W90827 I/Unocal SS#I 1195, 180175.85 Received: 8/18/99 <br /> Walnut Creek,CA 94568 Project Mana er: Julianne Fegley Reported: 8/26/99 <br /> Total.Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFTIQuality Control <br /> Sequoia Analytical-.San Carlos <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes# <br /> Matrix Spike Dug(continued} 9080103-MSD/ L908137-02 <br /> Surrogate: a,a,a-Trifluorotoluene 8/19/99 10.0 7.31 ug/1 70.0-130 73.1 <br /> Batch: 9080110 Date Prepared: 8/20199 Extraction Method: EPA 5030B(PITT <br /> Blank 9080110-BLK1 <br /> Purgeable Hydrocarbons as Gasoline 8120/99 ND ug/1 50.0 <br /> Benzene " NO 0.500 <br /> Toluene " NO 0.500 <br /> Ethylbenzene of NO 0.500 <br /> Xylenes(total) NO 0.500 <br /> Methyl tert-butyl ether NO 5.00 <br /> Surrogate: a,a,a-Difluorotoluene 10.0 10.9 70.0-130 109 <br /> LCS 9080110-BSI <br /> es:.-9Pnzene 8120/99 10.0 9.31 ug/I 70.0-130 93.1 <br /> F •._•. <br /> -)uene 10.0 9.46 70.0-130 94.6 <br /> i thylbenzene 10.0 9.52 70.0-130 95.2 <br /> Xylenes(total) 30.0 28.5 70.0-130 95.0 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 10.1 70.0-130 101 <br /> Matrix Spike 9080110-MSI L908135-12 <br /> Benzene 8/20/99 10.0 ND 9.44 ug/l 60.0-140 94.4 <br /> Toluene 10.0 ND 9.54 60.0-140 95.4 <br /> Ethylbenzene 10.0 ND 9.58 60.0-140 95.8 <br /> Xylenes(total) 30.0 ND 29.0 60.0-140 96.7 <br /> Surrogate: a,a,a-Triuorotoluene 10.0 8.57 70.0-130 85.7 <br /> Matrix Spike Dup 9080110-MSD/ L908135-12 <br /> Benzene 8/20/99 10.0 ND 9.60 ug/1 60.0-140 96.0 25.0 1.68 <br /> Toluene 10.0 ND 9.69 " 60.10-140 96.9 25.0 1.56 <br /> Ethylbenzene 10.0 ND 9.74 60.0-140 97.4 25.0 1.66 <br /> Xylenes(total) 30.0 ND 29.9 60.0-140 99.7 25.0 3.05 <br /> Surrogate: a,a,a-Triuorotoluene 10.0 9.15 70.0-130 91.5 <br /> Batch: 9080129 Date Prepared: 8/23/99 Extraction Method: EPA 5030B IP/Tl <br /> Blank 9080129-BLKI <br /> Purgeable Hydrocarbons as Gasoline 8123199 NO ug/1 50.0 <br /> Benzene " NO 0.500 <br /> Toluene it NO 0.500 <br /> Ethylbenzene NO 0.500 <br /> Xylenes(total) ND 0.500 <br /> '14ethyl tert-butyl ether NO 5.00 <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions. <br /> Page 15 of 17 <br />