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SOIL SAMPLE VALIDATION INFORMATION Calscience Work Number: 08-07-1058 Samples: Al-1-1,A1-1-11), B2-1-1, B1-1-1,D3-1-1 and E-2-1 Collection Date: July 9, 2008 Polynuclear Aromatic Hydrocarbons—EPA Method 8310 Holding Times Soil samples have a 14-day analysis holding time requirement. All samples were analyzed within this time period. Blanks The method blank was analyzed and was contaminate free. Sensitivity The target Reporting Limit for PAH analyses in the samples was achieved except for samples Al-1-1, E2-1-1, and B1-1-1 which were diluted by factors of 50, 20, andl00, respectively. The Reporting Limits were adjusted by these factors. Surrogate Spike Recovery All samples and control samples were spiked with Decafluorobiphenyl prior to analysis. The surrogate percent recoveries were within the control limit range of the 40-160 % which indicated that compounds of interest were retained during the analysis procedure for all samples. Matrix Spike/Matrix Spike Duplicate The MS/MSDs were analyzed with the samples in the batch. The Laboratory QC indicated the MS and MSD %recoveries and the RPDs %recoveries were within the control limits. Laboratory Control Sample The percent recoveries of Laboratory Control Sample for all compounds were within the control limits as stated by Calscience. All LCS samples were analyzed with the same batches of the samples. No concentrations of the compounds were indicated. The percent recoveries were tabulated with the relative standard deviations. Duplicate Samples One sample was collected twice to determine the consistency of sampling. Compound Sample# Result Dup. Result % REC (ug/kg) Sam le# (ug/kg) Naphthalene Al-1-1 830 Al-1-1D 36 4% Acenaphthylene Al-1-1 250 Al-1-1D ND <1% Fluorene Al-1-1 130 Al-1-1D ND <1% Phenanthrene Al-1-1 1,400 Al-1-11) ND <1% 4