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CASTLE ANALYTICAL LA <br /> • BORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater, CA 95301 Phone (209)384-2930 <br /> ' Certificate No 2079 Fax (209)384-1507 <br /> [[Aftn <br /> dvanced GeoEnvironmental Inc Client Project ID Rainwater Car Wash Method TPH-Diesel <br /> Northern California Reference Number 3404 ►nstntment ID HP-GC1 <br /> 05 North Wilson Way Matrix Water Prepared 12-28-00 <br /> ockton CA 95205 Analyst Jim Phillips Analyzed 12-29-00 <br /> Tim Cuellar <br /> tReported 1-3-01 <br /> QUALITY CONTROL DATA REPORT <br /> 1 <br /> ANALYTE TPH-Diesel <br /> Spike Concentration 250 <br /> ' Units ug/L <br /> LCS Batch# TPHDW-0280 <br /> ' LCSA%Recovery 916% <br /> LCSB%Recovery 906% <br /> Control Limits 55 130% <br /> Relative%Difference 1 1 no/. <br /> ' MS/MSD Batch# TPHDW-0280 ' <br /> MS % Recovery See Note <br /> ' MSD% Recovery See Note <br /> Relative %Difference See Note <br /> ' Note Insufficient sample material to prepare MS/MSD samples LCS samples prepared in duplicate <br /> The LCS (Laboratory Check Sample)is a control sample of known interferent free matnx that is fortified with representative analytes and <br /> using analyzed the <br /> Y g 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 MS/MSD's are advisory only and are not used to acceptor <br /> reject batch results <br /> E <br /> ANA✓_YS I APPROVED BY <br /> Ctan J Cone Phi ips - - <br /> ' Environmental Lab Director <br />