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Sequoia 0680 Chesapeake Drive Redwood City CA 940JI(415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 %00 FAX(9 16)921 0100 <br /> PDS Services Client Project 11) Unocal#5886,2701 W March Ln Stockton Sampled Sep 2, 1997 <br /> 401 Stanwell Dr, Ste 300 Sample Descript Water, MW-2 Received Sep 2, 1997 <br /> Concord, CA 94520 Analysis Method EPA 8260 Analyzed Sep 15, 1997 <br /> Attention Jarrel Crider Lab Number 709-0243 Reported Sep 17, 1997 <br /> VOLATILE ORGANIC COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> Ng/L Ng/L <br /> MTBE 100 <br /> 9100 <br /> Surrogates Control Limit% % Recovery <br /> Di bromofl uorom ethane 50 150 109 <br /> Analytes reported as N D were not present above the stated lima of detection <br /> SEQUOIA ANALYTICAL,#1271 <br /> nature on File <br /> Alan B Kemp <br /> Project Manager Page 2 of 2 <br /> 7090242 MPD <4> <br />