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Ile CASTLE ANALYTICAL LABORATORY <br />' Environmental Testing Services 2333 Shuttle Drive Atwater, CA 95301 Phone (209) 384-2930 <br /> Certificate No 2079 Fax (209) 384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Cal Fuels Method TPH Diesel <br />' of Northern California Reference Number 2549 Instrument ID HP-GC1 <br /> 4005 North Wilson Way Matrix Water Prepared 10-21 99 <br /> Stockton, CA 95205 Analyst Jim Phillips Analyzed 10-23-99 <br /> Attn Tim Cuellar Reported 11 10-99 <br /> QUALITY CONTROL DATA REPORT <br /> 1 <br /> ANALYTE TPH-Diesel <br /> Spike Concentration 250 <br />' Units ug/L <br /> LCS Batch k TPHDW 0219 <br /> LCSA % Recovery 837% <br /> LCSB % Recovery 88 1% <br /> Control Limits 55-130 % <br /> Relative % Difference 5 19% <br /> MS/MSD Batch #✓ TPHDW 0219 <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 /> I11❑ L4O iLaUVIQtVry t rIt!U% SdI1Fi./IG1 IS d VVIItIVI ,aFI;PJ a Vf R11VW11 IIIrCrfCrt-m Irty 11 curlx didL rA IVrwivu WI44 repre5e11ld11VV dl4dly LCA dIIU <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 MS/MSD s are advisory only and are not used to accept or <br /> reject batch results <br /> (If <br /> iANALYST APPROVED BY <br /> Clan J Cone J es C Phfllrps <br /> nvironmental Lab Drrecror <br />