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819 Sinker Avenue Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> ,::i)� <br /> Analytical (916)921-9600 t FAX 916 92 1 <br /> www sequotalabs corn com <br /> SECOR International-Rancho Cordova Project ARCO 2093,Tracy,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 09/28/01 16 24 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> ATR-3 I 22 -01 Water Saml2led 09/12/01 16 26 Received 09/14/01 13 40 <br /> Tert-butyl alcohol ND 200 ug/l 1 1090238 09/24/01 09/24/01 EPA 8260B <br /> Surrozate 1 2-DCA-d4 106% 60-140 " <br /> ATR-8 1 22 -02 Water Sampled 09/12/01 15 55 Received 09/14/01 13 40 <br /> Tert-butyl alcohol ND 200 ug/l t 1090271 09/26/01 09/26/01 EPA 8260B <br /> Surrozate 12-DCA-d4 104% 60-140 " <br /> ATR-6 5109227-03 Water Sampled 09/12/01 14 11 Received 09/14/01 13 40 <br /> Teri-butyl alcohol ND 200 ug/1 1 1090238 09/24/01 09/24/01 EPA 8260E <br /> Surrozate 1 2-DCA-d4 104% 60-140 " ~ <br /> ATR4 5109227-04 Water Sampled 09/12/01 13 37 Received 09/14/01 13 40 <br /> Tert-butyl alcohol ND 200 ug/l 1 1090238 09/24/01 09/24/01 EPA 8260B <br /> Surrozate 1 2-DCA-d4 101 % 60-140 ~ " <br /> R-7 S109227-05)Water Sampled 09/12/01 13 07 Received 09/14/01 I3 40 <br /> "Wert-butyl alcohol ND 200 ug/1 1 1090238 09/24/01 09/24/01 EPA 8260E <br /> Surrogate 12-DCA-d4 103% 60-140 " <br /> ATR-9 5109227 Water Sampled 09/12/01 12 30 Received 09/14/0113 40 <br /> Tert-butyl alcohol ND 200 um 1 1090238 09/24/01 09/24/01 EPA 8260B <br /> Surrogate 12-DCA-d4 108% 60-140 " <br /> ATR-1215109227-071 Water Sampled 09/12/01 12 O,I Received 09114101_13,40 <br /> Tert-butyl alcohol ND 200 ug/1 1 1090238 09/24/01 09/24/01 EPA 8260E <br /> Surrogate 12-DCA-d4 106% 60-140 " <br /> uota 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 to its entirety <br /> Page Page 2 of 13 <br />