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Sequoia680 Chesapeake Dnve Redwood City,CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 4DA <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> nalyt1Ca1 819 Sinker Avenue Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Cambria Client Pros ID Shell Manteca Sampled 03/25/98 <br /> 1144 65th St Suite C Sample Descript MW-1, 26-27 Received 03/26/98 <br /> Oakland, CA 94608 Matrix SOLID Extracted 04/01/98 <br /> Analysis Method 8015Mod/8020 Analyzed 04/01/98 <br /> Attention Paul Waite Lab Number 9803J57-07 M Reported 04109198 <br /> QC Batch Number GC040198BTEXEXA <br /> Instrument ID GCHP18 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 10 19 <br /> Benzene 00050 N D <br /> Toluene .. 0.0050 0 020 <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) .. 00050 0 17 <br /> Chromatogram Pattern >C10 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 107 <br /> 4-Bromofluorobenzene 60 140 138 <br /> • <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> }d Herling <br /> Pr ect Manager Page 14 <br />