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404 N Wlget Lane <br /> Sequoia Waknut (Creek)�4� <br /> FAX(925) 988-9673 <br /> Analytical www sequokalabs com <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite j Project Number Chevron# 9-8264 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 29-Dec-00 08 15 <br /> Volatile Organic Compounds by EPA Method 8010B- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lumt Units Level Result %RFC Limits RPD Limit Notes <br /> Batch OL19005-EPA 5030B [PIT] <br /> LCS(OL19005-BS2) Prepared&Analyzed 20-Dec-00 <br /> l,1-Dichloroethene 240 1 0 ugII 280 857 65-135 <br /> Tnchloroethene 220 20 200 t t0 70-130 <br /> Chlorobenzene 160 1 0 200 800 70-130 <br /> Surrogate Dibromodifluoromethane 840 100 840 50-150 <br /> Surrogate 4-Bromofluorobenzene 890 100 890 50.150 <br /> LCS(OL19005-BS3) Prepared&Analyzed 19-Dec-00 <br /> 1,1-Dichlorodhene 220 10 ugll 280 786 65-135 <br /> Trichloroethene 190 20 200 950 70-130 <br /> Chlorobenzene 150 10 200 750 70-130 <br /> Surrogate Dibromodifluoromethane 760 100 760 50-150 <br /> Surrogate 4-BromoJluorober¢ene 850 100 850 50-150 <br /> LCS(OL19005-BS4) Prepared&Analyzed 21-Dec-00 <br /> IJ-Dichloroethene 190 10 ug/l 280 679 65-135 <br /> T'nchloroethene 200 20 200 100 70-130 <br /> Chlorobenzene 170 10 200 850 70.130 <br /> Surrogate Dzbromodifluoromethane 840 100 840 50-150 <br /> Surrogate 4 Bromofluorobenzene 110 100 110 50-150 <br /> Matra Spike(OL19005-MS1) Source W012152-01 Prepared&Analyzed 19-Dec-00 <br /> ],I-Dichloroethene 230 10 ugA 280 ND 821 60-140 <br /> Trichloroethene 200 20 200 ND 100 60-140 <br /> Chlorobenzene 180 10 200 ND 900 60-140 <br /> Surrogate Drbromodifluoromethane 780 100 780 50.150 <br /> Surrogate 4-Bromofluorobenzene 810 100 810 SO-150 <br /> Matrix Spike Dup(OL19005-MSD1) Source W012152-01 Prepared&Analyzed 19-Dec-00 <br /> 1,1-Didiloroethene 240 10 urA 280 ND 857 60-140 426 25 <br /> Tnchloroethene 210 20 200 ND 105 60440 488 25 <br /> Chlorobenzene 190 10 " 200 ND 950 60-140 541 25 <br /> Surrogate Dibromodifluoromethane 810 100 810 50-150 <br /> Surrogate 4-Bromofluorobenzene 920 100 920 SO-150 <br /> Sequoia Analytical-Walnut Creek The results in tits report apply to the samples analyzed in accordance with the churn oj� <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 16 of 22 <br />