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eurofins 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 3 Quality Control Summary Client Name: Chevron Environmental Mgmt Co Group Number: 1334981 Reported: 09/24/12 at 10:56 AM 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: B122621AA Sample number(s) : 6785308-6785310 Benzene N.D. 0.005 0.0005 mg/kg 100 94 80-120 6 30 Ethylbenzene N.D. 0.005 0.001 mg/kg 99 93 80-120 6 30 Toluene N.D. 0.005 0.001 mg/kg 99 93 80-120 6 30 Xylene (Total) N.D. 0.005 0.001 mg/kg 101 95 80-120 6 30 Batch number: 12256SLD026 Sample number(s) : 6785308-6785310 Acenaphthene N.D. 0.0017 0.00067 mg/kg 100 73-120 Acenaphthylene N.D. 0.0017 0.00033 mg/kg 104 67-120 Anthracene N.D. 0.0017 0.00033 mg/kg 104 61-122 Benzo(a)anthracene N.D. 0.0017 0.00067 mg/kg 99 64-124 Benzo(a)pyrene N.D. 0.0017 0.00067 mg/kg 107 66-122 Benzo(b)fluoranthene N.D. 0.0017 0.00067 mg/kg 116 60-126 Benzo(g,h,i)perylene N.D. 0.0017 0.00067 mg/kg 109 66-130 Benzo(k)fluoranthene N.D. 0.0017 0.00067 mg/kg 108 65-130 Chrysene N.D. 0.0017 0.00033 mg/kg 99 66-121 Dibenz(a,h)anthracene N.D. 0.0017 0.00067 mg/kg 115 69-129 Fluoranthene N.D. 0.0017 0.00067 mg/kg 100 68-119 Fluorene N.D. 0.0017 0.00067 mg/kg 111 66-125 Indeno(1,2,3-cd)pyrene N.D. 0.0017 0.00067 mg/kg 114 66-122 1-Methylnaphthalene N.D. 0.0017 0.00067 mg/kg 112 72-120 2-Methylnaphthalene N.D. 0.0017 0.00067 mg/kg 117 57-132 Naphthalene N.D. 0.0017 0.00067 mg/kg 114 67-120 Phenanthrene N.D. 0.0017 0.00067 mg/kg 102 76-120 Pyrene N.D. 0.0017 0.00067 mg/kg 98 60-124 Batch number: 122560027A Sample number(s) : 6785308-6785310 C10-C36 N.D. 12. 3.9 mg/kg Total TPH N.D. 12. 3.9 mg/kg 79 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 %RBC %RSC Limits RPD MAX Conc Conc RPD Max Batch number: 12256SLD026 Sample number(s) : 6785308-6785310 UNSPK: 6785308 Acenaphthene 96 93 37-136 3 30 Acenaphthylene 95 88 29-133 8 30 Anthracene 96 97 73-115 2 30 Benzo(a)anthracene 95 94 32-135 0 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.