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• r 404 K Wiget Lane <br /> Walnut Creek,CA 94598 <br /> 925)988-9600 <br /> Sequoia. FAX(925)988-9673 <br /> Analytical a �. �. . ... . ,v,n,�n,.sec,uolalabs.�^n <br /> Gettler Ryan,Inc.-,Dublin .Project: Chevron <br /> 6747 Sierra CourtSuite J Project Number: Chevron#9-6258 Reported: <br /> Dublin CA,94568 .r_ -.Project Manager:,Deanna L.Harding 1 I-Aug-00 07:27- <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Walnut Creek x <br /> Reporting Spike Source %REC RPD f <br /> Analyte _ Result limit Units Level Result %REC Limits. RPD. Limit. .Notes . <br /> Batch OH09012-EPA 5030B[PIT} <br /> Blank(OH09012-BLKI) Prepared&Analyzed:09-Aug-00 <br /> Ethanol ND 500 ugll <br /> tent-Butyl alcohol ND 100 " <br /> Methyl tert-butyl ether ND 2.0 <br /> Di-isopropyl ether ND 2.0 " <br /> Ethyl tert-butyl ether ND 2.0 " <br /> tert-Amyl methyl ether ND 2.0 " <br /> Surrogate:Dibromofluoromethane 52.0 50.0 104 50-150 <br /> Surrogate:l,2-Dichloioetharre-d4 50.0 50.0 100 50-150 i <br /> LCS(OH09012-BSI) Prepared&Analyzed:09-Aug-00 <br /> Methyl tert-butyl ether 47.5 2.0 ugll 50.0 95.0 70-130 <br /> Surrogate:Dibromofluoromethane 51.0 50.0 104 50-150 1 <br /> Surrogate:1,2-Dichloroethane-d4 49.0 50.0 98.0 50-150 <br /> Matrix Spike(OH09012-MS1) Source.W007560-04 Prepared&Analyzed:09-Aug-00 <br /> Methyl Cert-butyl ether 48.9 2.0 ugn 50.0 ND 97.8 60-150 <br /> Surrogate:Dibromofluoromethane 54.0 50.0 108 '50-150 <br /> Surrogate:1.2-Dichloroethane-d4 49.0 50.0 98.0 50-150 <br /> Matrix Spike Dup(OH09012-MSD 1) E Source.W007560-04 Prepared&Analyzed:09-Aug-00 <br /> Methyl tert-butyl ether 54.7 2.0. u9A 50.0 ND 109 - 60-150 -11.2. 25 <br /> Sunugate:DibromoJlttorvmedum 55.0 50.0 110 50.150 <br /> X <br /> Surmgate:1.2-Dichloroethane-d4 50.0 50.0 100 50-150 <br /> i r _ <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chains <br /> custody document This analytical report must be reproduced in its entire. <br /> Page 7 of 9 <br /> r. ' <br />