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I <br />' COLUMBIA ANALYTICAL SERVICES INC <br /> Cbent Delta Environmental Consultants Service Request No X0500292 <br />' Project Canteen Corp Date Received March 16,2005 <br /> Sample Matrix. Water <br /> CASE NARRATIVE <br /> All analyses were performed consistent with the quality assurance program of Columbia Analytical <br /> Services, Inc (CAS) This report contains analytical results for samples designated for Tier II data <br /> I deliverables When appropriate to the method,method blank results have been reported with each analytical <br /> test Surrogate recoveries have been reported for all applicable organic analyses Additional quality control <br /> analyses reported herein include Matnx/Duplicate Matrix Spike (MS/DMS), and Laboratory/Duplicate <br /> Laboratory Control Sample(LCS/DLCS) <br /> Sample Receipt <br /> The samples were received for analysis at Columbia Analytical Services on March 16, 2005 No <br /> discrepancies were noted upon initial sample inspection Any exceptions would be noted on the cooler <br /> receipt and preservation form included in this data package The samples were received in good <br /> condition and consistent with the accompanying chain of custody forixi The samples were stored at 4°C <br /> upon receipt at the laboratory <br /> I Total Volatiles by EPA Method 8260 <br /> Sample MW 3A(X0500292-003)required dilutionof Methyl tert-Butyl Ether due to high concentration of <br /> target analyte <br /> ISample MW 13 (X0500292-005)required dilution due to high concentration of target analytes <br /> Matrix spike(XWG0500336-1 and XWG0500336-2)recovery for Ethylbenzene and o-Xylene on <br /> 3/24/05was high, the method control sample recovery was acceptable The recoveries were within the <br /> method default limits of 70-130% <br /> The associated DLCS (XWG0500336-4)recovery for Benzene, Toluene and 0-Xylene on 3124105 was <br /> above laboratory acceptance limits but within the method default linuts of 70-130% The LCS recoveries <br /> were within acceptance lirmts <br /> The associated DLCS (XWG0500341-2)recovery for 1,2-Dichloroethane,Toluene and 0-Xylene on <br /> I 3125/05 was above laboratory acceptance lirruts but within the method default limits of 70-130% The LCS <br /> recoveries were within acceptance linuts <br /> { <br /> Gasoline Range Organics by EPA Method 80 5GRO <br /> Method not promulgated either by EPA or ADHS <br /> Surrogate recovery was outside control limits for sample MW 13 (X0500292-005) Reanalysis confirms <br /> Imatrix interference <br /> Approved by Date 4 T'05' <br />