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404 N Wlget Lane <br /> Sequoia Walnut Creek, 94598 <br /> -9600 <br /> (925)98 98 8-90,00 <br /> FAX(925)%&%73 <br /> Analytical www corn <br /> q ,,, r Ah <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco 4 11192 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 16-Jan-01 07 47 <br /> Volatile Organic Cornpound&by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Re <br /> ,portmg Spike Source %REC RPD <br /> Analyte Result Limit Units, Level Result %REC Units ,, RPD Limit Notes <br /> Batch lAO5009-EPA 5030B[PIT] <br /> Matrix Spike(1A05009-MSI) Source tW101053-03 Prepared&Analyzed OS-'Ian-01 <br /> Methyl tent-butyl ether 519 20 ug/l 50 0 + ND '104 r 60-150 <br /> Surrogate Debromofluoromethane 480 500 960 50.150 <br /> Surrogate 1,2 Drchloroethane-d4 Soo 500 100 50-150 <br /> Matrix Spike Dup(1A05009-MSDI) Source W101053-03 Prepared&Analyzed 05-Jan-01 <br /> Methyl tent-butyl ether 511 20 ug/l 500 ND 102 60-150 155 25 <br /> Surrogate Dibrromofluoromethane 45 0 v 500 900 50.150 <br /> Surrogate 1 2 Drchloroethane-d4 490 500 980 50-150 <br /> r <br /> r r <br /> 5 , <br /> 1 r <br /> k <br /> r <br /> r <br /> >.aa <br /> t <br /> Sequoia Analytical-Walnut Creels The results in flus report apply to the samples analyzed rn accordmrce with the churn o <br /> custody document This analytical report must be reproduced in its enrr <br /> Page 6 of 7 <br />