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1 <br /> ' 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 GeoEnvrconmental, Inc Client Project ID Pacific Pride EI Dorado Method TPH Diesel <br /> ' of Northern California Reference Number 2701 Instrument ID HP-GC1 <br /> 4005 North Wilson Way Matrix Water Prepared 12-23-99 <br /> Stockton CA 95205 Analyst Jim Phillips Analyzed 12-27130 99 <br /> Attn Tim Cuellar Reported 1-4-00 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE TPH-Diesel <br /> Spike Concentration 250 <br /> ' Units ug1L <br /> LCS Batch # TPHDW-D239 <br /> ' LCSA % Recovery 900% <br /> LCSS % Recovery 77 5% <br /> ' .Control Limits 55 130 % <br /> Relative % Difference 15 0% <br /> MS/MSD Batch # TPHDW-D239 <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 :n duplicate <br /> The LCS {Laboratory Chock 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 OC 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 J es C Phillips <br /> Environmental Lab Director <br /> I <br />