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tiff e u rof i n s Lancaster Laboratories Analysis Report 2425 New Holland Pike,PO Box 12425,Lancaster,PA 17605-2425•717-656-2300 Fax:717-656-2681•www.lancasterlabs.com Page 1 of 5 Quality Control Summary Client Name: Chevron Environmental Mgmt Co Group Number: 1293926 Reported: 04/05/12 at 04 :09 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 LOO** MDL Units %REC %REC Limits RPD RPD Max Batch number: B120751AA Sample number(s) : 6571127-6571129 Benzene N.D. 0.005 0.0005 mg/kg 101 80-120 Ethylbenzene N.D. 0.005 0.001 mg/kg 104 80-120 Toluene N.D. 0.005 0.001 mg/kg 102 80-120 Xylene (Total) N.D. 0.005 0.001 mg/kg 101 80-120 Batch number: B120752AA Sample number(s) : 6571130-6571131 Benzene N.D. 0.005 0.0005 mg/kg 107 104 80-120 3 30 Ethylbenzene N.D. 0.005 0.001 mg/kg 110 106 80-120 3 30 Toluene N.D. 0.005 0.001 mg/kg 109 104 80-120 4 30 Xylene (Total) N.D. 0.005 0.001 mg/kg 107 103 80-120 4 30 Batch number: C120721AA Sample number(s) : 6571125-6571126 Benzene N.D. 0.5 0.1 ug/l 92 86 80-120 6 30 Ethylbenzene N.D. 0.5 0.1 ug/1 90 84 80-120 7 30 Toluene N.D. 0.5 0.1 ug/1 87 81 80-120 7 30 Xylene (Total) N.D. 0.5 0.1 ug/l 91 84 80-120 7 30 Batch number: 12069SLD026 Sample number(s) : 6571127-6571131 Acenaphthene N.D. 0.0017 0.00067 mg/kg 79 73-104 Acenaphthylene N.D. 0.0017 0.00033 mg/kg 70 67-100 Anthracene N.D. 0.0017 0.00033 mg/kg 79 69-107 Benzo(a)anthracene N.D. 0.0017 0.00067 mg/kg 82 74-112 Benzo(a)pyrene N.D. 0.0017 0.00067 mg/kg 87 70-109 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 89 66-130 Benzo(k)fluoranthene N.D. 0.0017 0.00067 mg/kg 80 65-130 Chrysene N.D. 0.0017 0.00033 mg/kg 84 79-111 Dibenz(a,h)anthracene N.D. 0.0017 0.00067 mg/kg 92 69-129 Fluoranthene N.D. 0.0017 0.00067 mg/kg 82 78-114 Fluorene N.D. 0.0017 0.00067 mg/kg 80 75-110 Indeno(1,2,3-cd)pyrene N.D. 0.0017 0.00067 mg/kg 92 53-128 1-Methylnaphthalene N.D. 0.0017 0.00067 mg/kg 75 72-114 2-Methylnaphthalene N.D. 0.0017 0.00067 mg/kg 68 62-115 Naphthalene N.D. 0.0017 0.00067 mg/kg 79 67-105 Phenanthrene N.D. 0.0017 0.00067 mg/kg 80 76-109 Pyrene N.D. 0.0017 0.00067 mg/kg 77 71-109 Batch number: 12069WAD026 Sample number(s) : 6571125 Acenaphthene N.D. 0.0090 0.0030 ug/1 84 85 68-116 1 30 Acenaphthylene N.D. 0.0050 0.0020 ug/l 86 86 69-126 0 30 Anthracene N.D. 0.0060 0.0030 ug/l 87 89 68-122 1 30 Benzo(a)anthracene N.D. 0.0090 0.0030 ug/l 84 84 60-119 0 30 Benzo(a)pyrene N.D. 0.0090 0.0030 ug/l 84 84 38-127 0 30 Benzo(b)fluoranthene N.D. 0.0090 0.0030 ug/l 82 85 34-136 3 30 Benzo(g,h,i)perylene N.D. 0.012 0.0040 ug/l 80 81 56-135 1 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.