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I <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> a_ 404 N Wiget Lane Wainnt Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> 1 � Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br />' Pacific Environmental Group Client Proj 1D 311-174 1A/5447, Stockton Sampled 02/24/98 <br /> 2025 Gateway Place, Suite 440 Sample Descript SP2(A-C)comp Received 02/24/98 <br /> San Jose, CA 95110 Matrix SOLID Extracted 02/25/98 <br /> Analysis Method 8015Mod/8020 Analyzed 02/26/98 <br />' Attention Jessica Nelligan Lab Number 9802F69-02 Reported 02126198 <br /> QC-Batch Number GCO22598BTEXEXA <br /> Instrument ID GCHP22 <br />' Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/K9 <br />' TPPH as Gas 1 0 1 9 <br /> Methyl t-Butyl Ether 0 025 N D <br />' Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 0 0050 N D <br /> Chromatogram Pattern <br />' Weathered Gas C6-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 95 <br /> O-Bromofluorobenzene 60 140 108 <br /> 1 <br /> 1 <br /> 1 <br /> i <br />' Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> I'Tod Granicher <br /> Project Manager Page 4 <br /> 1 <br />