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Sequoia 819 Striker Avenue,Suite <br /> Sacramento,CA 958344 <br /> (9 16) 92.1-9600 <br /> FAX(91(5)921-0100 <br /> Analytical www.sequoialabs.com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548, Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 ProjectNumber: NIA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 10/08/01 14:14 <br /> Total Purgeable Hydrocarbons, BTEX and MTBE in Air (ppmv) by DHS LUFT - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %R-EC RPD <br /> Analyte Result Limit Units Level Result %CLEC Limits RPD Limit Notes <br /> Batch 1100064-EPA 5030B (PIT) <br /> Blank(1100064-BLK1) Prepared&Analyzed: 10/03/01 <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 tert-butyl.ether ND 0.14 <br /> Surrogate:a,a,a-Trti larorotoluene 0.00216 0.00200 108 60-140 <br /> LCS(1100064-BSI) Prepared&Analyzed: 10/03/01 <br /> Surrogate:a,a,a-Trifluorotoluene 0.00202 ppnav 0.00200 101 60-140 <br /> S Dup(1100064-BSD1) _ Prepared&Analyzed: 10/03/01 <br /> ogate:a,a,a-Triuorololuene 0.00210 ppmv 0.00200 105 60-140 <br /> i <br /> I <br /> I <br /> uoia Analytical -Sacramento Tultsns report apply to the samples analyzed In accordance with the chain of <br /> custody document. This analytical report must he reproduced in its entirety. <br /> Page 5 of 6 <br />