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p 7 819 Striker Avenue Suite 8 <br /> 4D equola Sacramento CA 95834 <br /> (916)921-9600 <br /> AnalyAnalytical FAX(916)921 alabs c 00 <br /> tical www seduaialabs com <br /> Delta Environmental Consultants(Cameron Park) Project ARCO 2186, Stockton,CA <br /> 3330 Cameron Park Dr Ste 550 ProjectNumber N/A Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 07/05/01 12 49 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %RFC RPL' <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> J Batch 1060126-EPA 5030B [P/T] <br /> Blank(1060126-BLKI) Prepared&Analyzed 06/27/01 <br /> Ethanol ND I000 ug/l <br /> Tert-butyl alcohol ND 100 " <br /> Methyl tert-butyl ether ND 20 " <br /> DI-tsopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 " <br /> Surrogate 1 2-Dichloroethane d4 490 500 980 76-114 <br /> Blank(1060126-BLK2) Prepared&Analyzed 06/28/01 <br /> Ethanol ND 1000 ug/l <br /> Tert-butyl alcohol ND 100 " <br /> thyl tert-butyl ether ND 20 " <br /> isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 " <br /> Surrogate 12-Dichloroethane-d4 515 500 103 76-114 <br /> LCS(1060126-BS1) Prepared&Analyzed 06/27/01 <br /> Methyl tert-butyl ether 521 20 UM 500 104 70-130 <br /> Surrogate 1 2-Drchloroethane-d4 514 500 103 76-114 <br /> LCS(1060126-BS2) Prepared&Analyzed 06/28/01 <br /> Methyl tert-butyl ether 522 20 ug/1 Soo 104 70-130 <br /> Surrogate 12-Dichloroethane-d4 51.5 11 500 103 76-114 <br /> Matrix Spike(1060126-MS1) Source L106178-01 Prepared&Analyzed 06/28/01 <br /> Methyl tert-butyl ether 604 20 ug/l 500 21 78 8 60-140 <br /> Surrogate 1 2-Drchloroethane-d4 503 .500 101 76-114 <br /> cola AnalytlGal - SaGI&ril0rito The results to this report apply to the samples analyzed rn accordance with the chain of <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 7 of 10 <br />