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BP EXPLORATION & OIL, INC. <br /> ENVIRONMENTAL RESOURCE MANAGEMENT <br /> DATA REVIEW CHECKLIST <br /> BP Site Number: 11246 <br /> ERM Contract: H405058 <br /> Sampling Date: 9/3/98 <br /> Matrix Description: Water <br /> Date Final Report Received: 9/24/98 <br /> Laboratory & Location: SPL, Houston, Texas <br /> Yes No N/A <br /> I. Is BP contract release number <br /> consistent with analytical report? —X- <br /> 2. Was report submitted within.the <br /> specified timeframe? —X- <br /> 3. Does report agree with the COC? —X- <br /> 4. Are units consistent with the given matrix? —X- <br /> 5. Were any target analytes/compounds <br /> detected in blanks (i.e., trip or equipment)? —X- <br /> 6. Are duplicate water samples within 30%? —X- <br /> 7. Are holding times met? —X- <br /> 8. Are surrogates within limits using laboratory <br /> criteria? See Below <br /> 9. Are MS/MSD acceptable using laboratory See Below <br /> criteria? <br /> 10. Are LCS results acceptable using laboratory <br /> criteria? X <br /> Analysis of one of the three surrogates (toluene-d8) during EPA Method 8260 analysis of S- <br /> 10 was outside quality control limits; the quality control for that method specifies that only <br /> one of two surrogate should be within the specified recovery range. <br /> MS/MSD recovery and relative % difference for MTBE (8020) in the matrix spike was not <br /> calculated due to sample exceeding spike by a factor of 4 or more. MS/MSD relative % <br /> difference value for BTEX in the matrix spike was outside QC range due to matrix <br /> interference. MS/MSD limits are advisory only; as stated in SW-846, Section 8.7 to 8.8, if <br /> the MS/MSD results fall outside the advisable ranges, a laboratory control samples (LCS) <br /> must be analyzed and fall within those ranges. LCS results are within quality control limits. <br /> Data Validation Completed by: Brady Nagle <br /> (signature): 4�41r, <br /> Date: <br />