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CASTLE ANALYTICAL LABORATORY- <br /> Environmental testing Services P.O. Box 1360, Winton, CA. 95388 Phone: (2091384-2930 <br /> Certificate No. 2079 Fax: (209) 384-1507 <br /> Advanced GeoEnvironmental, Inc. Client Project ID: 95-0197 Method: TPH-Diesel <br /> ' of Northern California Reference Number: 658 Instrument ID: HP-GC1 <br /> 1803 West March Lane, Suite A Matrix:Water Prepared: 1-31-96 <br /> Stockton, CA 95207 Analyst: Clari Cone Analyzed: 1-31-96 <br /> Attn:Tim Cuellar Reported: 2-1-96 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE TPH-Diesel <br /> 1 <br /> Spike Concentration: 250 <br /> ' Units: uglL <br /> LCS Batch #: TPHDW-1316 <br /> eLCSA % Recovery: 78.0% <br /> LCSB % Recovery: 75.6% <br /> Control Limits: 55-130 % <br /> Ow <br /> Relative % Difference: 3.13% <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 MS/MSD samples. LCS samples prepared in duplicate. <br /> ' Please Note: <br /> The LCS (Laboratory Check Samplel is a control sample of known, interferent free matrix that is fortified with representative analytes and <br /> t 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 /> i <br /> a ANALYST: APPROVED BY: C. <br /> ri J. Cone l'my el C. Phillips <br /> Environmental Lab Director <br /> 1 <br />