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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services P 0 Box 1360, Winton, CA 95388 Phone (209) 384-2930 <br /> � Certificate No 2079 <br /> Fax (209) 384-1507 <br /> RM Associates Client Project ID 93-15 Method TPH-Diesel <br /> 1111 E Herndon, #108 Reference Number 532 Instrument ID HP-GC1 <br /> Fresno, CA 93720 Matrix Water Prepared 9-25-95 <br /> Attn Steve Fischenich Analyst Clan Cone Analyzed 9-25 95 <br /> Reported 9-26-95 <br /> QUALITY CONTROL DATA REPORT <br /> I <br /> ANALYTE TPH-Diesel <br /> i <br /> Spike Concentration 250 <br /> Units ug/L <br /> LCS Batch # TPHDW-9255 <br /> LCSA % Recovery 704% <br /> LCSB % Recovery 828% <br /> Control Limits 55-130 % <br /> ' Relative % Difference 162% <br /> MS/MSD Batch # See note <br /> MS % Recovery See note <br /> MSD % Recovery See note <br /> Relative % Difference See note <br /> Note Insufficient sample material to prepare MSIMSD samples LCS samples prepared in 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 GC limits and recoveries for MS/MSD s are advisory only and are not used to accept or <br /> reject batch results <br /> ANALYST APPROVED BY <br /> ' Clan J Cone Ja s C Phillips <br /> Fhi ironmental Lab Director <br />