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�. CASTLE ANALYTICAL LABORATORY Environmental Testing Services 2333 Shuttle Drive, Atwater,CA 95301 Phone: (209)384-2930 Certificate#2480 Fax: (209)384-1507 Lr Geological Technics, Inc. Client Project ID: 1218.2 Method: EPA 503018015M,8020 1101 7th Street Client Project Name:Elving(Broadway) Instrument ID:Var GC1 Modesto,CA 95354 Reference Number:8858 Extracted:01-10-06 L. Attn: Ray Kablanow Matrix:Soil Analyzed:01-10-06 Analyst: Clari Cone Reported:01-20-06 QUAL17Y CONTROL DATA REPORT ANALYTE Gasoline MTBE Benzene Toluene Ethyl Benzene Total Xylenes Spike Concentration: 2.20 45.2 27.2 153 36.8 178 Units: mg/kg ug/kg ug/kg uglkg ug/kg ug/kg LCS Batch#: VS-1106 VS-1106 VS-1106 VS-1106 VS-1106 VS-1106 LCS %Recovery: 67.2% 89.4% 110% 104% 108% 106% Surrogate Recovery: 107% 106% 106% 106% 106% 106% Control Limits: 70-130% 70-130% 70-130% 70-130% 70-130% 70-130% `„ MS/MSD Batch#: VS-1106 VS-1106 VS-1106 VS-1106 VS-1106 VS-1106 MS% Recovery: 63.5% 73.5% 87.9% 85.1% 87.2% 86.5% Surrogate Recovery: 87.3% 87.4% 87.4% 87.4% 87.4% 87.4% Lr MSD%Recovery: 65.9% 53.3% 87,5% 86.0% 86.6% 88.0% Surrogate Recovery: 87.7% 86.6% 86.6% 86.6% 86.6% 86.6% L� Relative%Difference: 3.53% 31.8% 0.412% 1.05% 1.51% 1.67% Method Blank: ND ND ND ND ND ND Surrogate Recovery: 111% 115% 115% 115% 115% 115% L.r L. Please Note: The LCS(Laboratory Check Sample)is a control sample of known,interferent free matrix that is fortified with representative analytes and analyzed using the same reagents,preparation and analytical methods employed for the samples. The LCS%recovery is used for validation of sample batch results. Due to matrix effects,the QC limits and recoveries for MSIMSD's are advisory only and are not used to accept or reject batch results. Lr ; APPROVED BY: Jams V. i tory Director or Clare .'Cone/La6 rotary Manager Lr Lr