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4064 N Wiget lane <br /> Sequoia Walnut C��51 98 94598 <br /> 8-9600 <br /> 4 FAX(925)988-9673 <br /> 41) Analytical www sequoialabs com <br /> 070 <br /> E <br /> Ryan,Inc -Dublin Project Tosco <br /> ierra Court Suite J Project Number Tosca# l1194 Reported <br /> CA,94568 Protect Manager Doug Lee 04-Jan-01 10 30 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result 1,unit Units Level Result %REC Limits RPD Limit Notes <br /> Batch OL18009-EPA 5030B [PIT] <br /> LCS(OL18009-BSI) Prepared 13-Dec-00 Analyzed 13-Dec-01 <br /> 1,1-Dichloroethene 640 20 ug/l 700 914 65-135 <br /> Methyl tert-butyl ether 508 20 500 102 65-135 <br /> Benzene 62 0 20 500 124 70-130 <br /> Trichloroethene 606 20 500 121 70-130 <br /> Toluene 612 20 500 122 70-130 <br /> Chlorobenzene 630 20 300 126 70-130 <br /> Surrogate Dibromofluoromethane 470 500 940 50.150 <br /> Surrogate 1 1 Dichloroethane-d4 470 Soo 940 50-150 <br /> Surrogate Toluene-d8 510 500 102 50-150 <br /> Surrogate 4-Bromofluorobernene 480 500 960 50-150 <br /> LES(OL18009-BS2) Prepared&Analyzed 18-Dec-00 <br /> chloroethene 590 20 ugll 700 943 65-135 <br /> Methyl tert-butyl ether 450 20 500 900 65-135 <br /> Benzene 580 20 300 116 70-130 <br /> Trichloroethene 550 20 500 110 70-130 <br /> Toluene 560 20 500 112 70-130 <br /> Chlorobenzene 550 20 500 110 70-130 <br /> Surrogate Dibromofluoromethane 480 500 960 50-150 <br /> Surrogate 1 1-Dichloroethane-d4 480 500 960 50-150 <br /> Surrogate Toluene-d8 490 500 980 50.150 <br /> Surrogate 4-Bromofluorobeinene 500 500 100 50-ISO <br /> Matrix Spike(OL18009-MSI) Source W012299-06 Prepared&Analyzed 18-Dec-00 <br /> IJ-Dichloroethene 570 20 ugfl 700 ND 814 60-140 <br /> Methyl tert-butyl ether 460 20 500 ND 920 60-140 <br /> Benzene 58 0 2 0 500 ND 116 60440 <br /> Trichloroethene 570 2 0 Soo ND 114 60-140 <br /> Toluene 600 2 0 500 ND 120 60-140 <br /> Chlorobenzene 560 20 500 ND 112 60-140 <br /> Surrogate Dibromofluoromethane 480 500 960 50-150 <br /> Surrogate 11 Dichloroethane-d4 490 500 980 50-150 <br /> Surrogate Toluene-d8 480 500 960 50-150 <br /> Surrogate 4Bromofluorobenzene 470 500 940 50-150 <br /> ola Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 18 of 25 <br />