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tiff eurofins Lancaster Analysis Report Laboratories 2425 New Holland Pike,PO Box 12425,Lancaster,PA 17605-2425•717-656-2300 Fax:717-656-2681•www.lancasteriabs.com Page 1 of 3 Quality Control Summary Client Name: Chevron Environmental Mgmt Co Group Number: 1355270 Reported: 12/21/12 at 01:34 PM Matrix QC may not be reported if insufficient sample or site-specific QC samples were not submitted. In these situations, to demonstrate precision and accuracy at a batch level, a LCS/LCSD was performed, unless otherwise specified in the method. All Inorganic Initial Calibration and Continuing Calibration Blanks met acceptable method criteria unless otherwise noted on the Analysis Report. Laboratory Compliance Quality Control Blank Blank Blank Report LCS LCSD LCS/LCSD Analysis Name Result LOQ** MDL Units %REC %REC Limits RPD RPD Max Batch number: B123491AA Sample number(s) : 6889758-6889760 Benzene N.D. 0.005 0.0005 mg/kg 99 80-120 Ethylbenzene N.D. 0.005 0.001 mg/kg 99 80-120 Toluene N.D. 0.005 0.001 mg/kg 95 80-120 Xylene (Total) N.D. 0.005 0.001 mg/kg 98 80-120 Batch number: 12350SLA026 Sample number(s) : 6889758-6889760 Acenaphthene N.D. 0.0017 0.00067 mg/kg 84 73-120 Acenaphthylene N.D. 0.0017 0.00033 mg/kg 81 67-120 Anthracene N.D. 0.0017 0.00033 mg/kg 77 61-122 Benzo(a)anthracene N.D. 0.0017 0.00067 mg/kg 88 64-124 Benzo(a)pyrene N.D. 0.0017 0.00067 mg/kg 85 66-122 Benzo(b)fluoranthene N.D. 0.0017 0.00067 mg/kg 93 60-126 Benzo(g,h,i)perylene N.D. 0.0017 0.00067 mg/kg 80 66-130 Benzo(k)fluoranthene N.D. 0.0017 0.00067 mg/kg 82 65-130 Chrysene N.D. 0.0017 0.00033 mg/kg 82 66-121 Dibenz(a,h)anthracene N.D. 0.0017 0.00067 mg/kg 81 69-129 Fluoranthene N.D. 0.0017 0.00067 mg/kg 71 68-119 Fluorene N.D. 0.0017 0.00067 mg/kg 86 66-125 Indeno(1,2,3-cd)pyrene N.D. 0.0017 0.00067 mg/kg 80 66-122 1-Methylnaphthalene N.D. 0.0017 0.00067 mg/kg 81 72-120 2-Methylnaphthalene N.D. 0.0017 0.00067 mg/kg 85 57-132 Naphthalene N.D. 0.0017 0.00067 mg/kg 74 67-120 Phenanthrene N.D. 0.0017 0.00067 mg/kg 73* 76-120 Pyrene N.D. 0.0017 0.00067 mg/kg 86 60-124 Batch number: 123490010A Sample number(s) : 6889758-6889760 C10-C36 N.D. 12. 4.0 mg/kg Total TPH N.D. 12. 4.0 mg/kg 85 64-122 Sample Matrix Quality Control Unspiked (UNSPK) = the sample used in conjunction with the matrix spike Background (BKG) = the sample used in conjunction with the duplicate MS MSD MS/MSD RPD BKG DUP DUP Dup RPD Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max Batch number: B123491AA Sample number(s) : 6889758-6889760 UNSPK: P887081 Benzene 101 97 55-143 4 30 Ethylbenzene 83 74 44-141 11 30 Toluene 90 85 50-146 7 30 *-Outside of specification **-This limit was used in the evaluation of the final result for the blank (1)The result for one or both determinations was less than five times the LOQ. (2)The unspiked result was more than four times the spike added. Page 9 of 13