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Data Validation Checklist i <br /> Project Location/Project Number: Stockton / Chevron #306620 <br /> Date sampled: January7, 2009 I <br /> Method(s): EPA 8015M for TPHg, 8260 full scan and 1,2 DCA, EDB <br /> Lab/ Lab work order number: Lancaster/ 5573114 <br /> Place a check mark (2) in the appropriate column. If the answer is "No", describe lab's corrective action. <br /> Criteria Yes 7N/A <br /> ments <br /> Is COC included in lab report? X <br /> Where the samples properly preserved? <br /> Is laboratory narrative included in lab report? XWas the laboratory narrative free of any lab xplanation below I <br /> errors/discrepancies? <br /> Were holding times met? X <br /> Were samples received at the correct temperature (4t20C)? N/A <br /> Did laboratory analyze with methods specified on COC? X ' <br /> Were appropriate analyte detection limits achieved? X <br /> Were surrogate recoveries within allowable range? X See explanation below <br /> Were the laboratory Matrix Spike/Matrix Spike Duplicate N/A <br /> (MS/MSD) results within the allowable range? <br /> Were the Laboratory Control Spike/Laboratory Control Spike X <br /> Duplicate (LCS/LCSD) results within the allowable range? <br /> Blanks <br /> • Lab blanks: Did lab blanks have non-detect results? X <br /> • Field blanks: Did trip blanks have non-detect results? N/A Trip blanks not collected <br /> • Field blanks: Did rinsate blanks have non-detect results? <br /> N/A Rinsate blanks not collected <br /> Du licates <br /> • Lab dups: Did lab dups have results within allowable N/A <br /> range? <br /> • Field dups: Did field dups have results within allowable <br /> N/A Field dups not collected <br /> range? <br /> Notes: N/A = Not Applicable <br /> Comment explanations: <br /> The laboratory report narrative states, "The recovery of surrogate Fluorobenzene in sample Influent was outside <br /> control limits due to high level hydrocarbon matrix interference. Data is reported as qualified." <br />