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t <br />Sequoia <br />`'' � Analytical <br />0 <br />819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />(916) 921-9600 <br />FAX (916) 921-0100 <br />Gettler-Ryan - Rancho Cordova <br />Project Chevron 9-5775, Lodi, CA <br />Sampled <br />2/15100 <br />3164 Gold Camp Dr, Ste 240 <br />Project Number 346408 06 <br />Received <br />2/17100 <br />Rancho Cordova, CA 95670 <br />Project Manager David Herzog <br />Reported <br />311100 <br />MTBE Confirmation by EPA Method 8260A/Quality Control <br />Sequoia Analytical - Sacramento <br />Date Spike Sample <br />QC <br />Reporting Limit Recov <br />RPD RPD <br />Analyte <br />Analyzed Level Result <br />Result Units <br />Recov Limits % <br />Limit % Notes* <br />Batch 0020265 <br />Date Prepared 2129100 <br />Extraction Method LPA 5030E [MeOHI <br />Blank <br />0020265-BLKI <br />Methyl tert-butyl ether <br />2129100 <br />ND mg/kg <br />0 100 <br />Surrogate 1,2 -DCA -d4 <br />11250 <br />285 <br />600-140 114 <br />LCS <br />0020265 -BSI <br />Methyl tert-butyl ether <br />2129100 250 <br />2 53 mg/kg <br />700-130 101 <br />_ <br />Surrogate 12 -DCA -d4 <br />250 <br />2 87 <br />60 0-140 115 <br />Matrix Spike <br />0020265 -MSI S002351-01 <br />Methyl tert-butyl ether <br />2129100 250 ND <br />_ 2 48 mg/kg <br />- 600-140 992 <br />Surrogate 1,2 -DCA -d4 <br />112 50 <br />2 72 <br />600-140 109 <br />Matrix Spike Dup <br />0020265-MSDI 5002351-01 <br />thyl tert-butyl ether <br />2129100 250 ND <br />266 mg/kg <br />600-140 106 <br />25 0 _ 6 63 <br />Wrogate1,2 -DCA -d4 <br />112 50 <br />2 81 11600-140 <br />112 <br />- Sacramento <br />to end of report for text ofnotes and <br />Page 7 of 8 <br />