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i <br /> CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater CA 95301 Phone (209)384-2930 <br />' Certificate No 2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Pac Pride West Lane Method TPH-Diesel <br /> of Northern California Reference Number 6565 Instrument ID HP-GC1 <br /> 837 Shaw Road Matrix Water Extracted 01-28-04 <br /> Stockton CA 95215 Analyst Jim Phillips Analyzed 02-02-04 <br /> Attn. Tim Cuellar Reported 02-06-04 <br /> I <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE TPH-Diesel <br /> Spike Concentration 180 <br /> Units ug/L. <br /> Batch# TPHDW-1284 <br /> Method Blank ND <br /> LCSA% Recovery 997% <br />� . LCSB%Recovery 103% <br /> Control Limits 55-130% <br />' Relative% Difference 329% <br /> MS/MSD Batch# TPHDW-1284 <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 />' 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 /> relect batch results <br />' ANALYST APPROVED BY <br /> Clan J Con JWhes Phillips <br /> aboratory Am=ctor <br /> I Y <br />