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Sequoia Walnut Creek,CA 9 598 <br /> (925)988-9600 <br /> FAX 988-9673 <br /> Analytical www sequoequolalabs cam <br /> ettler Ryan,Inc -Dublin Protect Tosco <br /> 6747 Sierra Court Suite J Protect Number Tosco#6981 Reported <br /> Dublin CA,94568 Project Manager Scott Polston 09-Aug-0I 10 34 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical- Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1G27002- EPA 5030B PIT <br /> Blank(IG27002-BLKI) Prepared&Analyzed 26-Jul-01 <br /> Purgeable Ciydrocarbons ND 10 mg/ml Air <br /> Benzene NO 010 " <br /> Toluene NO 010 <br /> Ethylbenzene NO 010 " <br /> Xylenes(total) NO 0 10 " <br /> Methyl tert-butyl ether NO 050 " <br /> Surrogate aaa-Tr�uaratoluene 5 12 <br /> 600 853 70-130 <br /> Blank(1G27002-BLK2) Prepared&Analyzed 27-Jul-01 <br /> Purgeable Hydrocarbons NO 10 mg/ml Air <br /> Benzene ND 010 " <br /> Toluene NO 010 " <br /> enzerne NO 010 <br /> es(total) ND 010 " <br /> Methyl tert-butyl ether NO 050 " <br /> Surrogate aaa-Trifluorotoluene 7 72 600 1.29 70-130 <br /> LCS(IG27002-BSI) Prepared&Analyzed 26-Jul-01 <br /> Benzene 194 010 mg/m'Air 2 00 970 70-130 <br /> Toluene 188 010 200 940 70-130 <br /> Ethylbenzene 184 0 10 2 00 920 70-130 <br /> Xylenes(total) 5 18 0 10 600 863 70-130 <br /> Surrogate aaa-Trifluorotoluene 536 6 00 893 70-130 <br /> LCS(1G27002-BS2) Prepared&Analyzed 27-Jul-01 <br /> Benzene 426 0 10 mg/ml Air 400 106 70-130 <br /> Toluene 424 0 10 4 00 106 70-130 <br /> Ethylbenzene 428 0 10 4 00 107 70-130 <br /> Xylenes(total) 119 0 10 120 992 70-130 <br /> Surrogate a a a-Trifluorotoluene 580 600 967 70-130 <br /> Se oia Analytical - Walnut Creek The results in this 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 4 of 6 <br />