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Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek. CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> X11,7 Analytical 819 Straker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> uchstone Developments Client Project ID Chevron #9-4183 Sampled Apr 26, 1996 <br /> 1 Kingston Ave Sample Descript S011, UOSP-5(A-D) Received Apr 26, 1996 <br /> Oakland, CA 94611 Analysis Method EPA 8240 Extracted Apr 29, 1996 <br /> Attention Robert Mallory Lab Number 604-1873 Analyzed Apr 29, 1996 <br /> Reported Apr 30, 1996 <br /> QC Batch Number SP0429968240EXA <br /> Instrument ID GC/MS-2 <br /> VOLATILE ORGANICS by GC/MS (EPA 8240) <br /> Analyte Detection Limit Sample Results <br /> Ng/kg Ng/kg <br /> Vinyl acetate 100 N D <br /> Vinyl chloride 100 N D <br /> Total y eves 100 3,600 <br /> Surrogates Control Limit% % Recovery <br /> 1,2-Dlchloroethane-d4 50 150 95 <br /> Toluene-d8 50 150 103 <br /> 4-Bromofluorobenzene 50 150 96 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL, #1271 <br /> o°'{ti�ambrook <br /> Project Manager Page 2 of 2 <br /> 6041871 TUD <6> <br />