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819 Stnker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-96o0 <br /> Analytical FAX 91b <br /> alr WWW cqy; em <br /> Weston Solutions,M.-Walnut Creek Protect San Joaquin HSA S303630 <br />' 1575 Treat Blvd,Ste 212 Project Number N/A Reported <br /> Walnut Creek CA,94596 Project Manager Jessica Levine 04/09/03 17 58 <br /> Gasoline(2-Methylpentane to 1,2,4Trimethylbenzene)and BTEX by EPA 8015M and 8021B-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br />' Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3030394-EPA 5030B(P/1) <br />' Laboratory Control Sample 3030394-BS3 Prepared&Anal 03/28/03 <br /> Surrogate a a,a-Trrfluorotoluene 101 u9/1 100 101 60-140 <br /> Matrix Spike 3030394-MSI Source S303544-04 &Anal 03/26/03 <br /> Surrogate a a a-Trrfluorotoluene 9 63 ugR 100 96 60-140 <br /> Matrix Spike_Dup(3030394-MSD1) Source 5303544-04 Prepared&Analyzed 03/26/03 <br /> Surrogate a a a-Trrfluorotoluene 11 0 999/1 100 110 60-140 <br /> Batch 3030436-EPA 50305 <br /> Blank(3030436-BLKI) Prepared&Analyzed 03/27/03 <br /> Ptugeable Hydrocarbons ND 50 ugR <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 5U " <br />' Xylenes(total) ND 050 " <br /> Surrogate a a a-Trifluorotoluene 827 100 83 60-140 <br />' Blank(3030436-BLK2) Prepared&Analyzed 03/28/03 <br /> Purgeable Hydrocarbons ND 50 tigR <br /> Benzene ND 050 <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Trrfluorotoluene 904 100 90 60-140 <br /> Blank 3030436-BLK3 <br /> Prepared&Anal 04/01/03 <br /> Pmgeable Hydrocarbons ND 50 ugR <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbcazene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis 71iu analytical report must be reproduced in its enttrety <br /> ' Page 6 of 9 <br />