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Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> (D 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> 14W Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Cambria Client Proj ID Shell 2575 Country Club Blvd Sampled 12/09/97 <br />, 270 Perkins Ave Sample Descript MW-12-A4 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 Joe Neely Lab Number 9712705-04 Reported 12J30197 <br /> DC Batch Number GC121997BTEXEXA <br /> Instrument ID GCHP1 <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 - 8.1 <br /> Benzene 00050 ... 0 026 <br /> Toluene .. 00050 013 <br /> Ethyl Benzene .. .. 00050 ... 0 047 <br /> Xylenes (Total) -- 0.0050 - •- -- - 036 <br /> Chromatogram Pattern C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 110 <br /> 4-Bromofluorobenzene 60 140 105 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA A ALYTICAL - ELAP 41210 <br /> regory <br /> Project Manager Page 5 <br />