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1 <br />' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone (209)384-2930 <br />' Certificate#2079 Fax (209)384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Pacific Pride-West Lane Method TPH-Diesel <br />' of Northern California Reference Number 3041 Instrument ID HP-GC1 <br /> 4005 North Wilson Way Matrix Sod Prepared 6-13-00 <br /> Stockton, CA 95205 Analyst Clan Cone Analyzed 6-15-00 <br /> Attn Tim Cuellar Reported 6-19-00 <br />' QUALITY CONTROL DATA REPORT <br /> ANALYTE TPH-Diesel <br />' Spike Concentration 500 <br />' Units mglkg <br /> LCS Batch# TPHDS-6130A <br />' LCS%Recovery 996% <br /> Control Limits 60-130% <br />' MS/MSD Batch# TPHDS-6130A <br /> MS %Recovery 613% <br />' MSD%Recovery 665% <br /> Relative% Difference 690% <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 /> 1 <br /> ANALYST Y4APPROVED BY <br /> Clan J Cane James dbps <br /> Env nmental tab Director <br /> I <br />