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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)92.1-9600 <br /> Analytical FAX e-clu 921-0 100 <br /> • �.l www sequoialabs corn <br /> Delta Environmental Consultants(Cameron Park) Project Arco 6100,'Tracy, CA <br /> 3330 Cameron Park Dr Ste 550 Project Number 6100,Tracy,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 02/20/0216 47 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> (Analyte Result Limit Units Level Result %R1;C Limits RPD Limit Notes <br /> Batch 2020181 -EPA 5030B [MeOH] <br /> Blank(2020181-BLK1) Prepared&Analyzed 02/19/02 <br /> Tert-butyl alcohol ND 1 0 mg/kg <br /> Methyl tert-butyl ether ND 010 " <br /> Di-isopropyl ether ND 010 " <br /> Ethyl tert-butyl ether ND 010 <br /> Tert amyl methyl ether ND 010 " <br /> Surrogate 1 2-DCA-d4 234 250 936 60-140 <br /> LCS(2020181-BSI) Prepared&Analyzed 02/19/02 <br /> Methyl tert-butyl ether 215 010 mgtkg 250 860 60-140 <br /> Surrogate 11-DCA-d4 152 " 250 101 60-140 <br /> Aar,;Dup(2020181-BSD1) Prepared&Analyzed 02/19/02 <br /> ethyl tert butyl ether 224 010 mg/kg 250 896 60-140 410 25 <br /> Surrogate I 2-DCA-d4 268 250 107 60-140 <br /> Aink <br /> equoia Analytical- Sacramento 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 in its entirety <br /> Page 5 of 6 <br />