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'0 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-Djesel <br />' of Northern California Reference Number 6212 Instrument ID HP-GC1 <br /> 4005 North Wilson Way Sample Description Soil Extracted 10-16-03 <br /> Stockton CA 95205 Analyst Clan Cone Analyzed 10-22-03 <br /> Attn Tim Cuellar Reported 10-30-03 <br /> 1 <br /> QUALITY CONTROL DATA REPORT <br /> 1 <br /> ANALYTE TPH-Diesel <br />' Spike Concentration 500 <br />' Units mg/kg <br /> LCS Batch# TPHDS-0163 <br />' LCS %Recovery 870% <br /> Control Limits 60-130% <br />' MS/MSD Batch# TPHDS-0163 <br /> MS %Recovery 56$% <br />' MSD% Recovery 591% 6 <br /> Relative%Difference 373% <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 anaiytical 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 MSlMSD's are advisory only and are not used to accept or <br /> reject batch results <br /> ANALYST APPROVED BY <br /> Cla one Jath s h!llips <br /> Lp�oratory Director <br /> I <br />