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I <br /> Lek CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater, CA 95301 Phone. 1209) 384-2930 <br /> Certificate No. 2079 Fax: (209) 384-1507 <br /> Advanced GeoEnvironmental, Inc. Client Project ID: Paige's Towing Method: TPH-Diesel <br /> of Northern California Reference Number: 2366 Instrument ID: HP-GC1 <br /> 4005 North Wilson Way Matrix:Water Prepared. 7-20-99 <br /> Stockton. CA 95205 Analyst: Jim Phillips Analyzed: 7-20-99 <br /> Attn: Tim Cuellar Reported: 7-21-99 <br /> QUALITY CONTROL. DATA REPORT <br /> 1 <br /> ANALYTE TPH-Diesel <br /> Spike Concentration: 250 <br /> Units: ugiL <br /> LCS Batch #: TPHDW-7209 <br /> ' LCSA % Recovery: 103% <br /> LCSB % Recovery: 100% <br /> ' Control Limits: 55-130 % <br /> Relative % Difference: 2.75% <br /> ' MS/MSD Batch #: TPHDW-7209 <br /> ' MS % Recovery: See Note <br /> MSD % Recovery: See Note <br /> ' Relative % Difference: See Note <br /> Note: Insufficient sample material to prepare MSIMSD samples. LCS samples prepared in duplicate. <br /> ' The LCS (Laboratory Check Sample) is a control sample of known, interferent free matrix that is fortified with representative analytes and <br /> analyzed using the same reagents, preparation and analytical methods employed for the samples. The LCS % recovery is used for validation <br /> of sample batch results. Due to matrix effects, the 4C limits and recoveries for MSIMSD's are advisory only and are not used to accept or <br /> ' reject batch results. <br /> • ANALYST: A��OdWe—APPROVED BY: <br /> ' Clari J. Cone J es . Phillips <br /> Environmenral Lab Director <br /> 1 <br />