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S e q 7 O 1 a 404!V W Lane <br /> i.l (.� Walnut Creek CAA 9459$ <br /> (925)988-%m <br /> Analytical (925)alabs c 73 <br /> www sequoialabs[om <br /> 0 <br /> Gettler Ryan Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-2033 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 04-Sep-01 11 14 <br /> Volatile Organic Compounds by EPA Method 8021B - 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 I H29009- EPA 5030E IP/T] <br /> LCS(I H29009-BS 1) Prepared&Analyzed 29-Aug-01 <br /> 1,1-Dichloroethene v 173 10 ug/I 200 86 5 65-135 <br /> Trichloroethene 169 1 1 200 84 5 70-130 <br /> Chlorobenzene 179 1 0 200 895 70-130 <br /> Surrogate Dibromod ftuoromethane 101 100 101 50-150 <br /> Surrogate 4-Bromofluorobenzene 104 " 100 104 50-150 <br /> Matrix Spike(IH29009-MSI) Source W108354-01 Prepared&Analyzed 29-Aug-01 <br /> 1,1-Dichloroethene 17 7 10 ugfl 200 ND 88 5 60-140 <br /> Trichloroethene 189 1 1 200 ND 945 60-140 <br /> Chlorobenzene 186 1 0 200 ND 93 0 60-140 <br /> Surrogate Dibromodiuoromethane 995 100 995 50-150 <br /> Surrogate 4-Bromofluorobenzene 111 100 111 50-150 <br /> Matrix Spike Dup(IH29009-MSD1) Source W108354-01 Prepared&Analyzed 29-Aug-01 <br /> 1 1-Dichloroethene 170 10 ug/l 200 ND 85 0 60-140 4 03 25 <br /> Trichloroethene 186 1 1 200 ND 930 60-140 160 25 <br /> -Chlorobenzene - —18 7— 1 0— ---200—ND- —93-5-60-140 0-536--T-25 <br /> Surrogate Dibromodiuoromethane 952 100 952 50-150 <br /> Surrogate 4-Bromofluorobenzene 11 5 100 115 50-150 <br /> Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chat <br /> custody document This analytical report must be reproduced in its enter <br /> Page 17 of 26 <br />