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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: 1105968 Reported: 08/28/08 at 11:06 AM 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: 082330007A Sample number(s) : 5444433-5444436 Total TPH N.D. 4.0 12. mg/kg 83 66-113 Batch number: 08233SLCO26 Sample number(s) : 5444433-5444436 Naphthalene N.D. 0.00067 0.0017 mg/kg 78 67-105 Acenaphthylene N.D. 0.00033 0.0017 mg/kg 85 67-100 Acenaphthene N.D. 0.00067 0.0017 mg/kg 81 73-104 Fluorene N.D. 0.00067 0.0017 mg/kg 90 75-110 Phenanthrene N.D. 0.00067 0.0017 mg/kg 90 76-109 Anthracene N.D. 0.00033 0.0017 mg/kg 82 70-103 Fluoranthene N.D. 0.00067 0.0017 mg/kg 92 78-114 Pyrene N.D. 0.00067 0.0017 mg/kg 88 69-116 Benzo(a)anthracene N.D. 0.00067 0.0017 mg/kg 89 74-112 Chrysene N.D. 0.00033 0.0017 mg/kg 92 79-111 Benzo(b)fluoranthene N.D. 0.00067 0.0017 mg/kg 106 70-125 Benzo(k)fluoranthene N.D. 0.00067 0.0017 mg/kg 97 72-124 Benzo(a)pyrene N.D. 0.00067 0.0017 mg/kg 95 70-109 Indeno(1,2,3-cd)pyrene N.D. 0.00067 0.0017 mg/kg 100 64-127 Dibenz(a,h)anthracene N.D. 0.00067 0.0017 mg/kg 102 63-138 Benzo(g,h,i)perylene N.D. 0.00067 0.0017 mg/kg 96 58-131 Batch number: A082341AB Sample number(s) : 5444433-5444435 Benzene N.D. 0.0005 0.005 mg/kg 103 103 84-115 0 30 Toluene N.D. 0.001 0.005 mg/kg 102 101 81-116 1 30 Ethylbenzene N.D. 0.001 0.005 mg/kg 104 101 82-115 3 30 Xylene (Total) N.D. 0.001 0.005 mg/kg 104 100 82-117 4 30 Batch number: R082341AA Sample number(s) : 5444436 Benzene N.D. 0.025 0.25 mg/kg 102 99 84-115 3 30 Toluene N.D. 0.050 0.25 mg/kg 101 98 81-116 3 30 Ethylbenzene N.D. 0.050 0.25 mg/kg 101 97 82-115 4 30 Xylene (Total) N.D. 0.050 0.25 mg/kg 100 97 82-117 3 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: 082330007A Sample number(s) : 5444433-5444436 UNSPK: P442219 Total TPH 86 84 49-123 3 20 Batch number: 08233SLCO26 Sample number(s) : 5444433-5444436 UNSPK: 5444433 Naphthalene 76 74 27-145 3 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.