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.•a <br /> 819 Strlker Avenue,Sulte 8 <br /> 1 S e(�u o 1 a Sacramento.CA 95834 <br /> ® `1 (916)92.1-%00 <br /> Analytical FAX(916)921-0100 <br /> EA FAX <br /> OWA <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548, Stockton,CA <br /> 3330 Cameron Park Dr,Ste 550 ProjcaNumber: N/A Reported: <br /> Cameron Park CA, 95682 Project Manager. Jay Johnson 09/18/01 11:39 <br /> Total Purgeable Hydrocarbons, BTEX and MTBE in Air (ppmv) by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte 'Result Limit Units Level Result 0/.RSC Limits RPD Limit Notes <br /> Batch 1090028- EPA 5030B(P/T) <br /> Blank(1090028-BLK1) _ _ _Prepared&Analyzed: 09/05/01 <br /> Purgeable Hydrocarbons ND 2.8 ppmv <br /> Benzene ND 0.016 " <br /> Toluene ND 0.013 " <br /> Ethylbenzene ND 0.012 " <br /> Xylenes(total) ND 0.012 " <br /> Methyl tent-butyl ether ND 0.14 " <br /> Surrogate:a,a,a-Triuorotoluene 0.00212 10.00200 106 60-140 <br /> LCS(1090028-BSI) Prepared&Analyzed:09/05/01 _ <br /> Surrogate:a,a,a-Triuoroioluene 0.011226 ppmv 0.00200 113 60-140 —�-- <br /> &S Dup(1090028-ESDI) Prepared&Analyzed:09/05/01 <br /> Surrogate:a,a,a-Triuorotoluene 0.00114 ppmv 0.00200 107 60-140 <br /> Batch 1090087-EPA 5030B(P/T) <br /> Blank(I090087-BLKI) Prepared&Analyzed:09/07/01 <br /> Purgeable HydrocarbonsND 2.8 ppmv — �— <br /> Benzene ND 0.016 " <br /> Toluene ND 0.013 " <br /> Ethylbenzene NO 0.012 " <br /> Xylenes(total) ND 0.012 " <br /> Methyl tent-butyl ether ND 0.14 " <br /> Surrogale:a,a,a-Trihuorotoluene 0.00226 0.00200 113 60-140 <br /> LCS(1090087-BSI) Prepared&Analyzed:09/07/01 <br /> Surrogate:a,a,a-Trifluorotoluene 0.00260 ppmv 0.00200 — 130 60-140 LL <br /> I <br /> e-quota Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> AM Page 7 of 9 <br />