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_ 819 Striker Avenue,Suite 8 <br /> # 5834 <br /> Sequoia <br /> Sacramento,916) A -9600 <br /> (916)921-9600 <br /> Analytical <br /> FAX(916)921-0100 <br /> 1 Analytical FAX <br /> ` <br /> I <br /> Delta Environmental Consultants(Cameron Park) Project: Arco 6100,Tracy,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: ARCO 6100,Tracy,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 11/19/01 14:48 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source °/uREC RPD <br /> Analyte Result Limit Units Level Result %REC Limits. RPD Limit Notes <br /> Batch 1110102-EPA 5030B [P/T1 <br /> Blank(1110102-BLK1) Prepared&Analyzed: 11/09/01 <br /> Tert-butyl alcohol ND 100 no <br /> i. Methyl tert-butyl ether ND 1.0 " <br /> [ Di-isopropyl ether ND 1.0 " <br /> f Ethyl tert-butyl ether ND 1.0 <br /> E Tert-amyl methyl ether ND 1.0 <br /> Ethanol ND 1500 1 <br /> Surrogate:1,2-DCA-d4 22.3 25.0 89.2 60-140 h <br /> s <br /> {, LCS(1110102-BS1) Prepared&Analyzed: 11/09/01 <br /> Methyl tert-butyl ether 23.7 1.0 ugll 25.0 94.8 60-140 <br /> Surr <br /> ogate: 1,2-DCA-d4 22.9 25.0 91.6 60-140 <br /> Spike(1110102-MSI) - _ Source: 5111076-03 Prepared&Analyzed: 11/09/01 �_ 1 <br /> Methyl tert-butyl ether 20.6 1.0 ugll 25.0 ND 80.8 60-140 <br /> Surrogate: 1,2-DCA-d4 20.4 25.0 81.6 60-140 <br /> Matrix Spike Dup(1110102-MSDI) Source: S111076-03 Prepared&Analyzed: 11/09/01 _ <br /> Methyl tert-butyl ether 23.5 1.0 ug/l 25.0 ND 92.4 60-140 13.2 25 <br /> ' Surrogate: 1,2-DCA-d421.4 ---.—_-� —�"---_-25.0 85.6 60-I40 <br /> 1 <br /> i <br /> F <br /> quoia 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 /> i <br /> i <br /> Page 6 of 7 i <br />