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r <br /> 1 <br /> 819 Sinker Avenue,Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (D (916)921 9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs corn <br /> Delta EnVlronmental Consultants(Cameron Park) Ptoicct Arco 6080,Lathrop,CA <br /> 3330 Cameron Park Dr Ste 550 Project Number N/A Reported <br /> Cameron Park CA,95682 Prod-t Manager Jay Johnson 10/05/01 15 20 <br /> Volatile Organic Compounds by EPA Method 8260B -Quality Control <br /> Sequoia Analytical- Sacramento <br /> Rcporung Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1100049-EPA 5030B I P/T <br /> Blank(1100049-BLKI) Prepared&Analyzed 10/04/01 <br /> Tert-butyl alcohol ND 200 UgA <br /> Methyl tert-butyl ether ND 20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 2 0 <br /> Tert-amyl methyl ether ND 2 0 " <br /> Ethanol ND 3000 <br /> 1,2-Dichloroethane ND 20 <br /> Surrogate 12-DCA-d4 494 Soo 988 60-140 <br /> LCS(1100049-BSI) Prepared&Analyzed 10/04/01 <br /> Methyl tert-butyl ether 582 2 0 ug/l 500 116 60-140 <br /> Surrogate 1 2-DCA-d4 54 6 " 500 109 60-140 <br /> Matrix Spike 1100049-MS1 Source S109330-01 Prepared&Analyzed 10/04/01 <br /> Methyl tert-butyl ether 50 3 20 ugJl 500 ND 101 60-140 <br /> Surrogate 12-DCA-d4 481 500 962 60-140 <br /> Matrix Spike Du (1100049-MSDI) Source S109330-01 Prepared&Analyzed 10/04/01 <br /> Methyl tert butyl ether 51 5 2 0 ug/l 50 0 ND 103 60-140 2 36 25 <br /> Surrogate 1 2-DCA-d4 499 300 998 60-140 <br />. Sequoia Analytical-Sacramento The i esults in this i eport apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> Page Page 4 of 6 <br />