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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)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 9600 FAX(916)921-0100 <br /> Cambria Client Prod ID Shell 2575 Country Club Blvd Sampled 12/09/97 <br /> 270 Perkins Ave Sample Descript MW-12-A3 Received 12/11/97 <br /> Sonoma, CA 95476 Matrix LIQUID Extracted 12/19/97 <br /> Analysis Method 8015Mod/8020 Analyzed 12/22/97 <br /> Attention Jae Neely - Lab Number 9712705-03 _ Reported 12f30197 <br />)C batch Number GC121997BTEXEXA <br /> nstrument ID GCHP1 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> mg/K9 mg/K9 <br /> TPPH as Gas 10 N D <br /> Benzene 00050 00078 <br /> Toluene 000500026 <br /> .. <br /> Ethyl Benzene 00050 . . . . .. . . 00060 <br /> Xylenes (Total) .. 00050 0 036 <br /> Chromatogram Pattern <br /> i <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 102 <br /> 4-Bromofluorobenzene 60 140 117 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> i ory <br /> Project Manager Page 4 <br />