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Data Validation Checklist <br /> Project Location/Project Number: Stockton/Chevron#306620 <br /> Date sampled: August 27, 2010 <br /> Method(s): EPA 8015M for TPHg, 8260 full scan and 1,2 DCA, EDB <br /> Lab/Lab work order number: Lancaster/ 1210187 <br /> Place an"X" in the appropriate column. If the answer is "No", describe lab's corrective action. <br /> Crueria Yes No Comments <br /> Is COC included in lab report? X <br /> Were the samples properly preserved? X No indication otherwise <br /> Is laboratory narrative included in lab report? X <br /> Was the laboratory narrative free of any lab X <br /> errors/discrepancies? <br /> Were holding times met? X No indication otherwise <br /> ' Were samples received at the correct temperature X No indication otherwise <br /> (4t2°C)? <br /> Did laboratory analyze with methods specified on X <br /> COC? <br /> Were appropriate analyte detection limits achieved? X <br /> Were surrogate recoveries within allowable range? X <br /> ' Were the laboratory Matrix Spike/Matrix Spike X There was no recovery of 2-chloroethyl vinyl ether <br /> Duplicate (MS/MSD) results within the allowable (non-target compound), as indicated on pages 9, 10, <br /> range? 12, 13, 15, and 16 of the Quality Control Summary. <br /> 1 Recovery of methylene chloride was elevated, as <br /> indicated on page 15 of the Quality Control <br /> Summary. <br /> ' Were the Laboratory Control Spike/Laboratory X Recovery of 2-chloroethyl vinyl ether(non-target <br /> Control Spike Duplicate(LCS/LCSD)results within compound)was outside the low end of the allowable <br /> the allowable range? limits, as indicated on page 5 of the Quality Control <br /> Summary. <br /> Blanks <br /> ' Lab blanks: Did lab blanks have non-detect X <br /> results? <br /> • Field blanks: Did trip blanks have non-detect X <br /> results? <br /> • Field blanks: Did rinsate blanks have non-detect X <br /> ' results? <br /> Duplicates <br /> 1 • Lab dups: Did lab dups have results within X LCS/LCSD and MS/MSD dups. No lab dups for field <br /> allowable range? samples run. <br /> 1 • Field dups: Did field dups have results within X <br /> allowable range? <br />