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I <br /> CASTLE ANALYTICAL LABORATORY <br /> I ' Environmental Testing Services 2333 Shuttle Dnve,Atwater,CA 95301 Phone (209)384-2930 <br /> Certificate#2079 Fax (209)384-1507 <br /> Advanced GeoEnvironmental Inc Client Project ID Pacific Pride/El Dorado Method TPH-Diesel <br /> of Northern California Reference Number 3360 Instrument ID HP-GC1 <br /> 4005 North Wilson Way Matrix Sod Prepared 12-7-00 <br /> Stockton, CA 95205 Analyst Clan Cone Analyzed 12-8-00 <br /> Attn Tim Cuellar Reported 12-18-00 <br /> QUALITY CONTROL DATA REPORT <br /> 1 <br /> ANALYTE TPH-Diesel <br /> ' Spike Concentration 500 <br /> ' Units mg/kg <br /> LCS Batch# TPHDS-D070 <br /> LCS% Recovery NA* <br /> Control Limits 60-130% <br /> LCSA/LCS13 Batch# TPHDS-D070 <br /> LCSA%Recovery 776% <br /> ' LCSB%Recovery 749% <br /> Relative%Difference 353% <br /> i <br /> ' Matnx Spikes not pmpared Laboratory Control Spikes prepared and analyzed rn duplicate <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 Ile <br /> Clan J Cane s Phdllps <br /> Environmental Lab Director <br />