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CASTLE ANALYTICAL LABORATORY <br /> ' Environmental Testing Services P.O. Box 1360, Winton, CA. 95388 Phone: 1209) 384-2930 <br /> Certificate #2079 Fax: 1209) 384-1507 <br /> Advanced GeoEnvironmentai, Inc. Client Project ID: 95-0197 Method:TPH-Diesel <br /> ' of Northern California Reference Number: 663 Instrument ID: HP-GC1 <br /> 1803 West March Lane, Suite A Matrix: Soil Prepared: 2-5-96 <br /> Stockton, CA 95207 Analyst: Clari Cone Analyzed: 2-5-96 <br /> Attn: Tim Cuellar Reported: 2-7-96 <br /> QUALITY CONTROL DATA REPORT <br /> ' ANALYTE TPN-Diesel <br /> Spike Concentration: 5.00 <br /> Units: mg/kg <br /> LCS Batch #-. TPHD-2056 <br /> ' LCS % Recovery: 101% <br /> Control Limits: 60-130 % <br /> MS/MSD Batch #: TPHD-2056 <br /> ' MS % Recovery: 61.4% <br /> MSD % Recovery: 53.0% <br /> ' Relative % Difference: 13.3% <br /> ' Please Note: <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 QC limits and recoveries for MSIMSD's are advisory only and are not used to accept or <br /> ' reject batch results. <br /> ' ANALYST: APPROVED BY: /�) <br /> Clan J. Cone 4dmes C. Philkps <br /> Environmental Lab Director <br />