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404 N Wiget Lane <br /> Sequoia Walnut Creek C 94598 <br /> (925)988 8-9600 <br /> FAX(925)988-9673 <br /> Analytical www sequoialabs corn <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco#6981 Reported <br /> Dublin CA 94568 Project Manager Scott Polston 19-Dec-00 09 25 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX In Air by DHS LUFT - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> [AnIll to Result Linut Units Level Result %REC Limits RPD Limit Notes <br /> Batch OL18013-EPA 5030E SPIT] <br /> Blank(OL18013-BLKI) Prepared&Analyzed 30-Nov-00 <br /> Purgeable Hvdroc arbors ND 100 mg/m'Ajr <br /> Benzene ND 00500 " <br /> Toluene ND 00500 <br /> Ethvlbenzene ND 00500 " <br /> %vlenes(total) ND 00500 <br /> Surrogate a a a-Trifluorotoluene 1 74 200 870 60-140 <br /> LCS(OL18013-BSI) Prepared&Analvzed 30-Nov-00 <br /> Purgeable Hydrocarbons 58 0 ing/m'Air 500 116 70-130 <br /> Surrogate a a a-Trifluorotoluene 300 200 150 60-140 S02 <br /> • <br /> I <br /> Sequoia Analytical-Walnut Creek The results to this report apply to the samples analyzed in accordance with the cham <br /> custody document This analytical report must be reproduced rn its enh <br /> Page 5 of 6 <br />