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I <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 41� 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> IIWO Analytical 815 Straker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)931 0100 <br /> IPacific Environmental Group Client Prod ID 311-174 1A/5447,Stockton Sampled 02/24/98 <br /> - 2025 Gateway Place, Suite 440 Sample Descript SP2(D-F)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 /> I - Attention Jessica Nelligan Lab Number 9802F69-03 Reported 02J26198 <br /> QC Baich Number GCO22598BTEXEXA <br /> Instrument 1D GCHP01 <br /> ITotal Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/K9 mg/Kg <br /> TPPH as Gas 1 0 35 <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) 00050 N D <br /> Chromatogram Pattern <br /> IWeathered Gas C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> Trlfluorotoluene 70 130 93 <br /> I -Bromofluorobenzene 60 140 93 _- y <br /> I <br /> I <br /> I <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> od Granicher <br /> Project Manager Page s <br /> rte, - <br />