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1, <br /> CASTLE ANALYTICAL LABORATORY <br /> t Environmental Testing Services P.O. Box 1360, Winton, CA. 95388 Phone: (209) 384-2930 <br /> Certificate No. 2079 Fax: (209) 384-1507 <br /> Advanced GeoEnvironmental, Inc. Client Project ID: Flag City Chevron Method: TPH-Diesel <br />' of Northern California Reference Number: 817 Instrument ID: HP-GC1 <br /> 1803 West March Lane, Suite A Matrix: Water Prepared: 7-29-96 <br /> Stockton, CA 95207 Analyst: Jim Phillips Analyzed: 7-30-96 <br /> Attn: Tim Cuellar Reported: 7-31-96 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE TPH-Diesel <br />' Spike Concentration: 250 <br />' Units: ug/L <br /> LCS Batch #: TPHDW-7296 <br /> ILCSA % Recovery: 72.4% <br /> LCSB % Recovery: 71.6% <br /> Control Limits: 55-130 % <br /> Relative % Difference: 1.1 1% <br /> MS/MSD Batch #: See note <br /> MS % Recovery: See note <br /> MSD % Recovery: See note <br /> IRelative % Difference: See note <br /> Nate: 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 /> 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 /> I c <br /> ANALYST: C APPROVED BY 7 C 1 �� <br /> c�tf�C.. <br /> Clari J. Cone Ja es C. Phillips <br /> nvironmental Lab Director <br />