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1455 McDowell Blvd North,Ste D <br /> 4 Sequoia Petaluma CA 94954 <br /> (707) 792-1865 <br /> ,!D Analytical FAX(707) 792-0342 <br /> Cambria Environmental Project Shell Oil Co Sampled 8/11/99 to 8/12/99 <br /> 270 Perkins St Project Number 440 W Charter, Stockton Received 8/13/99 <br /> Sonoma,CA 95476 Project Manager Aubrey Cool Reported 8120/99 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> LCS(continued) 9080398-BS2 <br /> Xylenes(total) 8118/99 0 600 0 674 mg/kg 650-135 112 <br /> Surrogate a a,a-Trifluorotoluene " 0 300 0 309 it650-135 103 <br /> LCS 9080398-BS3 <br /> Gasoline 8/19/99 200 1 93 mg/kg 65 0-135 965 <br /> Surrogate 4-Bromofluorobenzene 110 300 0183 650-135 943 <br /> _Matrix Spike 9080398-MS1 P908378-01 <br /> Benzene 8/17/99 0200 ND 0202 mg/kg 650-135 101 <br /> Toluene 0200 ND 0202 650-135 101 <br /> Ethylbenzene 0200 ND 0 198 650-135 990 <br /> Xylenes(total) 0 600 00172 0 663 65 0-135 108 <br /> Surrogate a a a-Trifluorotoluene 0 300 0 320 650-135 107 <br /> Grix Spike Dup 9080398-MSDI P908378-0I <br /> Benzene 8/17/99 0200 ND 0208 mg/kg 650-135 104 200 2 93 <br /> Toluene 0200 ND 0208 65 0-135 104 200 2 93 <br /> Ethylbenzene 0200 ND 0203 65 0-135 101 200 2 00 <br /> Xylenes(total) 0 600 00172 0 680 65 0-135 110 20 0 1 83 <br /> Surrogate a,a a-Trrfluorotoluene 0 300 0 326 650-135 109 <br /> 0 <br /> Sequoia Analytical-Petaluma *Refer to end of report for tert of notes and definitions <br /> Page 11 of 16 <br />