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'`w' • �;t:� <br /> 'Chesapeake Drive Redwood City.CA°..v'3 (650) 364-9600 FAX(650) 364-9233 <br /> f <br /> Sequoia 404 N.Wiget Lane Walnur Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (9 16)921.9600 FAX(916)921-0100- <br /> 1455 McDowell Blvd. North.Ste, D Petaluma.CA 94954 {707)792-1865 FAX(707)792-0342 <br /> Analytical 1551 Industrial Raid San Carlos.CA 94070-411 1 (650)232-9600 FAX(650)232-9611, <br /> i <br /> Cambria Environmental Project: Equilon, 1313 E. Charter Way,Stockton,CA Sampled: 4/29/99 <br /> 270 Perkins Street.i Project Number: N/A Received: 4/29/99 <br /> Sonoma,CA 95476 Project Manager: Aubrey Reported: 516199 <br /> Cool <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFtOuality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD 1 <br /> Analyte k Analyzed' Level Result Result Units Recov. Limits % Limit % Notes* <br /> Batch:-9050044 4 Extr,.Won Mete.-I., EPA 5030E(MeOHl <br /> Blank 9050044-BL K1 1.00 <br /> Purgeable Hydrocarbons 514/99 ND mg/kg <br /> Benzene ND 0.00500 <br /> ND 0.00500 <br /> Toluene ND 0.00500 <br /> Ethylbenzene „ <br /> ND 0.00500 <br /> Xylenes(total) <br /> 0 <br /> Methyl tert-butyl ether ND . <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.179 60.0-140-I40 89.5 <br /> I_CS 9050044-BSL <br /> 8.0 <br /> Benzene 514199 0.200 0.196 mg/kg 70.0-130 105 <br /> Toluene 0.200 0.210 70.0130 105 <br /> Ethylbenzene 0.200 0.213 70.0-130 106 <br /> Xylenes(total) 0.600 0.574 70.0-130 95.7 <br /> Methyl tert-butyl ether 0.200 0.177 70.0-130 88.5 <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.185 60.0-140 92.5 <br /> Matrix Spike 9050044-MSl S905036-04 <br /> Benzene p 5/4/99 0.200 ND 0.168 mg/kg 60.0-140 84.0 <br /> Toluene 0.200 ND 0.185 60.0-140 92.5 <br /> Ethylbenzene 0.200 ND 0.190 60.0-140 97.0 <br /> Xylencs(total) i 0.600 ND 0.528 60.0-140 88.0 <br /> Methyl tert-butyl ether 0.200 ND 0.156 60.0-140 78.0 <br /> Surrogate: a,a,a-'Trifluorotoluene 0.200 0.181 60.0-140 90.5 <br /> Matrix Spike Dup_ 9050044 1 5905036-04 <br /> Benzene 5/4/99 0.200 ND 0.172 mg/kg 60.0-140 86.0 25.0 2.3� <br /> Toluene 0.200 ND 0.180 60.0-140 90.0 25.0 2.74 <br /> Ethylbenzene 0.200 ND 0.193 60.0-140 96.5 25.0 1.57 <br /> Xylenes(total) 0.600 ND 0.534 60.0-140 $9.0 25.0 1.13 <br /> Methyl test-butyl:ether 0.200 ND 0.162 60.0-140 81.0 25.0 3.77 <br /> Surrogate: a,a,a-Tr�uorotoluene 0.200 0.190 60.0-140 95.0 <br /> Batch- 9030050 ExtraWon Nlcthod- EPA 5030B r <br /> eO <br /> Blank 9050050 BLK1 <br /> Purgeable Hydrocarbons 5/5/99 ND mg/kg 1.00 <br /> Benzene ND 0.00500 <br /> Toluene ND 0.00500 <br /> Ethylbenzene ND " 0.00500 <br /> Xylenes(total) ND 0'00500 <br /> Methyl tert-butyl ether ND 0.0500 <br /> Sequoia Analytical-Sacramento *Refer to end of report for test of notes and definitions. <br /> �a, ra R. anson,Client Services Representative Page 5 of 8 <br />