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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,)9 95834 <br /> (916)421-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs com <br /> SECOR International-Rancho Cordova Protect ARCO 434,Lodi,CA <br /> 3017 Kilgore Road,Suite i00 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 10/01/01 14 56 <br /> MTBE by EPA Method 8260B <br /> Sequoia Analyheal-Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> W- 10 258-01 Water Sampled 09/12/0100 00 Received 09/17/01 11 1 <br /> Methyl ter(-butyl ether ND 20 ug(l 1 1090238 09/24/01 09/24/01 EPA 8260B <br /> Surrogate 12-DCA-d4 III% 60-140 " <br /> 0 258-02 Water Sampled 09/1219100 00 Received 09/17101 11 10 <br /> Methyl Cert-butyl ether ND 20 ug/1 1 1090271 09/26/01 09/26/01 EPA 8260E <br /> Surrozate 12-DCA-d4 101% 60-140 <br /> W-2A(S109258-03)Water Sampled 09/1210100 00 Received 09/17/0111 10 R-05 <br /> Methyl tert-butyl ether ND 10 ugll 5 1090271 09/26!01 09/26/01 EPA 8260B <br /> Surrogate 1 2-BCA-d4 102% 60-140 " <br /> W-2B(S109258-04)Water Sampled 09/1210100 00 Received 09/17/0111 10 <br /> Methyl tent-butyl ether ND 20 ugll 1 1090271 09/26/01 09/26/01 EPA 8260B <br /> Surrogate 1 2-DCA-d4 102% 60-140 " <br /> Mk-ll 5109258-05Water Sampled 09/12/0100 00 Received 09/17/01 11 10 <br /> ethyl tert-butyl ether ND 20 ug/l 1 1090271 09/26/01 09/26/01 EPA 8260E <br /> Surrogate 12-DCA-d4 103% 60-140 " <br /> WA(S109258-06)Water Sampled 0911210100 00 Received 09/17/0111 10 <br /> Methyl tert-butyl ether ND 20 ug/I 1 1090271 09/26/01 09/26/01 EPA 8260B <br /> Surrogate 1 2-DCA-d4 104% 60-140 <br /> quota Analytical-Sacramento The results in this report 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 2 of 12 <br />