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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#2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental Inc Client Project ID Pacific Pride-West Lane Method TPH-Diesel <br />' of Northern California Reference Number 6211 Instrument ID HP-GC1 <br /> 4005 North Wilson Way Sample Description Soil Extracted 10-21-03 <br /> Stockton, CA 95205 Analyst Clan Cone Analyzed 10-24-03 <br /> Attn Tim Cuellar Reported 10-30-03 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE TPH-Diesel <br />' Spike Concentration 500 <br />' Units mg/kg <br /> LCS Batch# TPHDS-0213 <br />' LCS% Recovery 767% <br /> Control Limits 60-130% <br />' MS/MSD Batch# TPHDS-0213 <br /> MS% Recovery 557% tntr <br />' MSD%Recovery 557% <br /> Relative% Difference 0065% <br /> I <br /> I <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 QC limits and recoveries for MS/MSD's are advisory only and are not used to accept or <br /> reject batch results <br /> ANALYST rx. APPROVED BY <br /> Clan J Cone Jam Blips <br /> La story Director <br /> I <br />