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Sequoia680 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 a19 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> low <br /> j4 Enviros - -� - Client Pro' ID Shell Stockton - - - Sampled 09/18/97 <br /> u 270 Perkins Ave Sample Descript SS-1A Received 09/19/97 <br /> F Sonoma, CA 95476 Matrix SOLID Extracted 09/23/97 <br /> U Analysis Method 8015Mod/8020 Analyzed 09/25/97 <br /> ' Attention J Gaarder _ Lab Number 9709C12-01 _ _ _ _ _ _ Reported 09f26f97 <br /> QC Batch Number GCO92397BTEXEXC <br /> Instrument ID GCHP01 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 1 0 N D <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 94 <br /> 4-Bromofluorobenzene 60 140 85 <br /> Analytes reported as N D were not present above the stated IEmit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> eory <br /> Pr t Manager Page 2 <br />