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ID680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> bill' Analytical 819 Striker Avenue Suite S Sacramento CA 95834 (916)921-9600 FAX(91[6)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services Clier t Proj ID Shell 2575 Country Club Sampled 04/23/98 <br /> 1680 Rogers Avenue Sample Descrlpt 2452CC Down Hole Received 04/24/98 <br /> San Jose, CA 95112 Matrix LIQUID ' <br /> Analysis Method EPA 8260 Analyzed 05/07/98 <br /> Attention Fran Th ie -Lab-Number 9804H08-16 Reported 05J1 2J98 <br /> Fuel Oxygenates by EPA 8260 <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 500 N D <br /> t-Butanol 100 N D <br /> Methyl t-Butyl Ether (MTBE) 20 N D <br /> Di-Isopropyl Ether (DIPE) 20 N D <br /> Ethyl t-Butyl Ether (ETBE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dlchloroethane-d4 76 114 93 <br /> Analytes reported as N D we not present above the stated limit of detection <br /> SE0001 Ac YTI AL — ELAP #1271 <br /> P 1n <br /> 41ro9ject Manager Page 19 <br />