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I <br /> CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services P O Box 1360, Winton, CA 95388 Phone (209) 384-2930 <br /> Certificate No 2079 Fax (209) 384 1 507 <br />' Advanced GeoEnvironmental, Inc Client Project ID Nomellini Method TPH-Diesel <br /> of Northern California Reference Number 764 Instrument 1D HP-GC1 <br /> 1803 West March Lane, Suite A Matrix Water Prepared 5-30-96 <br /> Stockton, CA 95207 Analyst Jim Phillips Analyzed 5-30-96 <br />' Ann Tim Cuellar Reported 6 4-96 <br />' QUALITY CONTROL DATA REPORT <br />' ANALYTE TPH-Diesel <br /> Spike Concentration 250 <br /> IUnits ug/L <br /> LCS Batch # TPHDW-5306 <br /> LCSA % Recovery 896% <br /> LCSB % Recovery 85 6% <br /> Control Limits 55-130 % <br /> Relative % Difference 101% <br /> I <br /> MS/MSD Batch # See note <br /> MS % Recovery See nate <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 matrix that is fortified with representative analytes and <br /> P P Yt <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 OC limits and recoveries for MSIMSD's are advisory only and are not used to accept or <br /> reject batch results <br /> J <br /> ANALYST APPROVED BY <br /> Clary J Cone mes Phr Irps <br /> Environmental Lab Director <br />