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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 /> W1,W Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Touchstone Developments Client Prol ID Chevron 9-4183 /9-4183 Sampled 04/10/96 <br /> 781 Kingston Ave Sample Descript UOSP-2(A-D) Received 04/10/96 <br /> Oakland, CA 94611 Matrix SOLID Extracted 04/16/96 <br /> Analysis Method EPA 8240 Analyzed 04/16/96 <br /> Attention Robert Mallory Lab Number 9604898-07 Reported 04119196 <br /> OC Batch Number MSO410968240EXA <br /> Instrument ID F3 <br /> Analyte Detection Limit Sample Results <br /> ug/K9 ug/K9 <br /> Total Xylenes 200 28000 <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 70 121 79 <br /> Toluene-d8 81 117 92 <br /> 4-Bromofluorobenzene 74 121 92 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Follett <br /> ct Manager Page 13 <br />