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Sequoia 4 N WrLane <br /> Walnut Creek CAA 945" <br /> (925)988-%00 <br /> FAX(925)988-%73 <br /> �111� Analytical www sequoialabs com <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite 3 ProjectNumber Tosco#6981 Reported <br /> Dublin CA,94568 _ Project Manager Scott Polston _ _ 08-Jan-01 11 43 <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 Ututs Level Result %REC Limits RPD Limit Notes <br /> Batch 1A02019- EPA 5030B 1P/T] <br /> Blank(1A02019-BLKI) Prepared&Analyzed 21-Dec-00 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air <br /> Benzene ND 0 10 " <br /> Toluene ND 010 " <br /> Ethylbenzene ND 010 " <br /> Xylenes(total) ND 0 10 <br /> Methyl tert-butyl ether ND 050 <br /> Surrogate a a,a-Trtfluorotoluene 5 50 600 91 7 70-130 <br /> Blank(1A02019-BLK2) Prepared&Analyzed 22-Dec-00 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air <br /> Benzene ND 010 " <br /> Toluene ND 010 <br /> Ethylbenzene ND 010 " <br /> Xylenes(total) ND 010 " <br /> Methyl tent-butyl ether ND 050 " <br /> Surrogate aa,a-Tnfluorofoluene 544 600 907 70-130 <br /> Blank(1A02019-BLK3) Prepared&Analyzed 23-Dec-00 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air <br /> Benzene ND 010 " <br /> Toluene ND 010 " <br /> Ethylbenzene ND 010 " <br /> Xylenes(total) ND 0 10 <br /> Methyl tert-butyl ether ND 050 <br /> Surrogate a r;a-Trifluorotaluene 598 600 997 70-130 <br /> LCS(1A02019-BS1) Prepared&Analyzed 21-Dec-00 <br /> Benzene 1 46 0 <br /> 10 mg/m3 Air 200 730 70-130 <br /> Toluene 147 0 10 200 73 5 70-130 <br /> Ethylbenzene 143 0 10 200 71 5 70-130 <br /> Xylenes(total) 428 0 10 600 71 3 70-130 <br /> Surrogate a a a-Tnfluorafolueue 4 98 <br /> 600 83 0 70-130 <br /> Sequala Analytical-Walnut Creek The results in ilns report apply to the samples analyzed in accordance with the ch <br /> tun <br /> custody document This analytical report must be reproduced in its enure <br /> Page 5 of 9 <br />