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Data Validation Checklist I <br /> Project Location/Project Number: Stockton / Chevron #306620 I <br /> Date sampled: February 2, 2009 <br /> Method(s): EPA Modified TO-3 for TPHg, BTEX, and MTBE <br /> Lab/ Lab work order number: Air Toxics, LTD. /0902021 I <br /> Place a check mark (Q) in the appropriate column. If the answer is "No", describe lab's corrective action. <br /> Criteria Yes No Comments <br /> Is COC included in lab report? X <br /> Where the samples properly preserved? N/A <br /> Is laboratory narrative included in lab report? X <br /> Was the laboratory narrative free of any lab X See explanation below <br /> errors/discrepancies? <br /> Were holding times met? X <br /> Were samples received at the correct temperature (4±2°C)? N/A <br /> Did laboratory analyze with methods specified on COC? X <br /> Were appropriate analyte detection limits achieved? X <br /> drab <br /> 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 /> Fe 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? N/A Rinsate blanks not collected <br /> Duplicates <br /> • Lab dups: Did lab dups have results within allowable X See explanation below <br /> range? <br /> • Field dups: Did field dups have results within allowable 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 /> The laboratory report narrative states, "The RPD of duplicate samples Effluent and Effluent Lab Duplicate ' <br /> exceeded acceptance limits for some target species due to target compound concentrations present at less than <br /> 5X the reporting limit." <br />