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404 N Wiget Lane <br /> Sequoia Walnut Creek)9 94598 <br /> FAX(925)988-9673 <br /> ?ttl�er <br /> „�� Analytical www sequoialabs corn Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco 4 11193 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 04-Jan-01 10 26 <br /> Volatile Organic Compounds by EPA Method 8260B - 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 OL18009-EPA 5030B[PIT] <br /> LCS(OL18009-BS1) Prepared 13-Dec-00 Analyzed 13-Dec-01 <br /> 1,1-Dichloroethene 640 20 ug/1 700 9t4 65-135 <br /> Methyl tort-butyl ether 508 20 500 102 65-135 <br /> Benzene 620 20 50 0 124 70-130 <br /> Trichloroethene 606 20 500 121 70-130 <br /> Toluene 612 20 500 122 70-130 <br /> Chlorobenzene 630 20 500 126 70-130 <br /> Surrogate Dibromofluoromethane 470 500 940 50-150 <br /> Surrogate 12-Dtchloroethane-d4 470 500 940 50.150 <br /> Surrogate Toluene-d8 510 500 102 50-150 <br /> Surrogate 4-Bromofluorobemene 480 Soo 960 50.150 <br /> LCS(OLIS009-BS2) Prepared&Analyzed 18-Dec-00 <br /> Dichloroethene 590 2 0 ugll 700 843 65-135 <br /> iyl tert-butyl ether 450 20 50 0 900 65-135 <br /> Benzene 580 20 500 116 70-130 <br /> Trichloroethene 550 2 0 500 110 70-130 <br /> Toluene 560 20 50 0 112 70-130 <br /> Chlorobenzene 550 2 0 50 0 110 70-130 <br /> Surrogate Dibromofluoromethane 48 0 500 960 50-150 <br /> Surrogate 1 2 Dichloroethane-d4 480 500 960 50-150 <br /> Surrogate Toluene-d8 490 Soo 980 50-150 <br /> Surrogate 4-Bromofluorobemene 500 500 100 50-150 <br /> Matrix Spike(OLIS009-MSI) Source W012299-06 Prepared&Analyzed 18-Dec-00 <br /> 1,l-Dichloroethene 570 20 ug/I 700 ND 814 60-140 <br /> Methyl tern-butyl ether 460 20 500 ND 920 60-140 <br /> Benzene 580 2 0 500 ND 116 60-140 <br /> Trichloroethene 570 20 300 ND 114 60-140 <br /> Toluene 600 2 0 500 ND 120 60-140 <br /> Chlorobenzene 560 2 0 500 ND 112 60-140 <br /> Surrogate Dibromofluoromethane 480 500 960 50.150 <br /> Surrogate 1 2-Dichloroethane-d4 490 500 980 50-150 <br /> Surrogate Toluene-d8 480 500 960 50-150 <br /> Surrogate 4-Bromofluorobemene 470 500 940 50.150 <br /> egnola Analytical -Walnut Creek The results in this report apply to the samples analyzed in accordance with the churn of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 19 of 27 <br />