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Lancaster Laboratories Analysis Report 2425 New Holland Pike,PO Box 12425,Lancaster,PA 17605-2425-717-656-2300 Fax:717-656-2681•www.larcasterIabs.com Page 1 of 3 Quality Control Summary Client Name: Chevron Environmental Mgt. Co. Group Number: 1122196 Reported: 12/12/08 at 01:38 PM Matrix QC may not be reported if 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. Laboratory Compliance Quality Control Blank Blank Blank Report LCS LCSD LCS/LCSD Analysis Name Result MDL** Loo Units %REC %REC Limits RPD RPD Max Batch number: 083380010A Sample number(s) : 5542386-5542390 Total TPH N.D. 4.0 12 mg/kg 94 66-113 Batch number: 08338SLB026 Sample number(s) : 5542386-5542390 Naphthalene 0.0011 0.00067 0.0017 mg/kg 81 67-105 Acenaphthylene N.D. 0.00033 0.0017 mg/kg 85 67-100 Acenaphthene N.D. 0.00067 0.0017 mg/kg 84 73-104 Fluorene N.D. 0.00067 0.0017 mg/kg 90 75-110 Phenanthrene N.D. 0.00067 0.0017 mg/kg 92 76-109 Anthracene N.D. 0.00033 0.0017 mg/kg 87 70-103 Fluoranthene N.D. 0.00067 0.0017 mg/kg 91 78-114 Pyrene N.D. 0.00067 0.0017 mg/kg 83 69-116 Benzo(a)anthracene N.D. 0.00067 0.0017 mg/kg 88 74-112 Chrysene N.D. 0.00033 0.0017 mg/kg 89 79-111 Benzo(b)fluoranthene N.D. 0.00067 0.0017 mg/kg 89 70-125 Benzo(k)fluoranthene N.D. 0.00067 0.0017 mg/kg 90 72-124 Benzo(a)pyrene N.D. 0.00067 0.0017 mg/kg 80 70-109 Indeno(1,2,3-cd)pyrene N.D. 0.00067 0.0017 mg/kg 92 64-127 Dibenz(a,h)anthracene N.D. 0.00067 0.0017 mg/kg 96 63-138 Benzo(g,h,i)perylene N.D. 0.00067 0.0017 mg/kg 88 58-131 Batch number: A083391AA Sample number(s) : 5542386-5542390 Benzene N.D. 0.0005 0.005 mg/kg 112 109 84-115 2 30 Toluene N.D. 0.001 0.005 mg/kg 106 105 81-116 2 30 Ethylbenzene N.D. 0.001 0.005 mg/kg 104 102 82-115 2 30 Xylene (Total) N.D. 0.001 0.005 mg/kg 104 104 82-117 1 30 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: 083380010A Sample number(s) : 5542386-5542390 UNSPK: 5542387 Total TPH 92 91 49-123 1 20 Batch number: 08338SLB026 Sample number(s) : 5542386-5542390 UNSPK: 5542387 Naphthalene 67 81 27-145 19 30 Acenaphthylene 51 61 42-141 18 30 Acenaphthene 73 85 37-145 14 30 Fluorene 78 90 51-142 14 30 Phenanthrene 77 90 42-144 14 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.