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Suite 8 <br /> Sequoia 819 acriu ento,Avenue. 95834 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> r <br /> FAX 90AnalyticaI wwwsequoialabs.com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548,Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: ARCO 548,Stockton,CA Reported: <br /> Cameron Park CA, 95682 Project Manager: Jay Johnson 11/12/01 16:37 <br /> Total Purgeable Hydrocarbons, BTEX and MTBE in Air (ppmv) by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source "/oREC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1110072-EPA 5030E (PIT) <br /> Blank(1110072-BLKI) Prepared&Analyzed: 11/05/01 _ <br /> Purgeable Hydrocarbons ND IS 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-Trifiuorotoluene 0.00190 110.00200 95.0 60-140 <br /> LCS(1110072-BSI) Prepared&Analyzed: 11/05/01 <br /> Surrogate:a,a,a-Trifluoratoluene 0.00202 ppmv 0.00200 101 60-140 <br /> S Dup(1110072-BSDI) Prepared&Analyzed: 11/05/01 <br /> Surrogate:a,a,a-Trifluorotaluene 0.00194 ppmv 0.00200 97.0 60-140 <br /> Ask <br /> quoia 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 /> Page 5 of 6 <br />