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404 N WI et lane <br /> Sequoia Walnut Creek CA9 <br /> (925)988-96009600 <br /> 1 4 <br /> 5)— <br /> FAX(925)98$-9673 <br /> Analytical www-wguolalabs coir' <br /> Gettler Ryan,ltic -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco#4409 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 06-Feb-01 17 21 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reportmg Spike Source a/aREC RPD <br /> Analyte Result Lmut Units Level Result %REC Luruts RPD Luna Notes <br /> Batch 1A25002-EPA 5030B[PM <br /> Blank(1A25002-BI.KI) Prepared&Analyzed 25-Jan-01 <br /> Purgeable hydrocarbons ND 50 ng/l <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tart-butyl ether ND 25 " <br /> Surrogate a a a-YhOwormoluene 312 " 300 104 70-130 <br /> LCS{IA25002-BSI) Prepared&Analyzed 25-Jan-01 <br /> Benzene 225 050 u9/1 200 113 70-130 <br /> Toluene 225 050 200 113 70-130 <br /> IR&MlhM7an22 2 050 200 111 70.130 <br /> (total) 66 9 050 600 112 70-130 <br /> Surrogate a q a-ThJhroraohoene 2&6 300 953 70.130 <br /> Matra Spike(1A25002-MSI) Source W101427-01 Prepared&Analyzed 25-Jan-01 <br /> Benzene 216 050 ug/l 200 ND 108 70-130 <br /> Tohiene 216 050 " 200 ND 108 70-130 <br /> Ethylbenzene 211 050 200 ND 106 70.130 <br /> Xylenes(total) 623 0 50 600 ND 104 70-130 <br /> Surrogate q4xa-TnJ7:worotoluem 3Z2 300 107 70-130 <br /> Matra Spike Dnp(1A25002-MSDI) Source W101427-01 Prepared&Analyzed 25-Jan-01 <br /> Benzene 22 0 050 ug/I 200 ND 110 70-130 183 20 <br /> Toluene 219 050 200 ND 109 70-130 138 20 <br /> Ethylbenzene 215 050 200 ND 108 70-130 199 20 <br /> Xylenes(total) 648 050 600 ND 108 70-130 393 20 <br /> Surrogate a q a-Tri luorotoluene 2&4 300 947 70.130 <br /> la Analytical-Walnut Creek The results in this report apply to the samples malwed in accordance with the chain of <br /> custody domment.This analytical report must be reproduced in its enimety <br /> Page 8 of 12 <br />