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404 N Wlget Lane <br /> Sequoia Walnut Geek CA 94598 <br /> (925)988-9600 <br /> FAX(925)988.9673 <br /> Analytical www sequolalabs COM <br /> lerRyan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco 11 11193 Reported <br /> Dublin CA,94568 Pra)ect Manager Doug Lee 02-Apr-01 17 54 <br /> Total Purgeable Hydrocarbons (C6-Cl2), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units bevel Result %REC Limits RPD Limit Notes <br /> Batch 1C29001 -EPA 5030B PIT <br /> Blank(1C29001-$LKI) Prepared&Analyzed 29-Mar-01 <br /> Purgeable Hydrocarbons— ND 50 ug/I — <br /> Benrene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(tatal) ND 050 " <br /> lvlethyl Cert-butyl ether ND 25 " <br /> Surrogate a a a-Tnfluorotoluene 303 " 300 101 70-130 <br /> LCS(1 C29001-BSI) Prepared&Analyzed 29-Mar-01 <br /> Benzene 180 050 ug/l 200 900 70-130 <br /> Toluene 188 050 " 200 940 70-130 <br /> Ethylbenzene 195 050 " 200 975 70-130 <br /> 91wties(total) 589 050 600 982 70-130 <br /> -gate a a a-Tri luorotoluene 287 300 957 70-130 <br /> LCS Dup(l C29001-BSD1) Prepared&Analyzed 29-Mar-01 <br /> Benzene 192 050 ug/l 200 960 70-130 645 20 <br /> Toluene 199 050 " 200 995 70-130 568 20 <br /> Ethylbenzene 200 050 200 100 70-I30 253 20 <br /> Xylenes(total) 609 050 600 l02 70-130 334 20 <br /> Surrogate a a a-Trifivorololuene 308 It <br /> 300 103 70-130 <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the char»of <br /> custody document This analytical report must he reproduced in its entirety <br /> Page 3 of 4 <br />