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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9133 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> X117 Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> uchstone Developments Client Project 10 Chevron #9-4183 Sampled Apr 26, 1996 <br /> 1 Kingston Ave Sample Descript S011, UOSP-6(A-D) Received Apr 26, 1996 <br /> Oakland, CA 94611 Analysis Method EPA 8240 Extracted Apr 29, 1996 <br /> Attention Robert Mallory Lab Number 604-1874 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 /> N9/k9 N9/k9 <br /> Vinyl acetate 100 N D <br /> Vinyl chloride 100 N D <br /> Total Xylenes 100 550 <br /> Surrogates Control Limit% % Recovery <br /> 1,2-Dichloroethane-d4 50 150 94 <br /> Toluene-d8 50 150 105 <br /> 4-Bromofluorobenzene 50 150 97 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL, #1271 <br /> Ke4naSlambrook <br /> Project Manager Page 2 of 2 <br /> 6041871 TUD <8> <br /> TX <br />