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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 5 Quality Control Summary Client Name: Chevron Environmental Mgt. Co. Group Number: 1084091 Reported: 04/15/08 at 01:17 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: 08098SLHO26 Sample number(s) : 5318601-5318613 Naphthalene N.D. 0.00067 0.0017 mg/kg 84 67-105 Acenaphthylene N.D. 0.00033 0.0017 mg/kg 85 67-100 Acenaphthene N.D. 0.00067 0.0017 mg/kg 89 73-104 Fluorene N.D. 0.00067 0.0017 mg/kg 93 75-110 Phenanthrene N.D. 0.00067 0.0017 mg/kg 95 76-109 Anthracene N.D. 0.00033 0.0017 mg/kg 90 70-103 Fluoranthene N.D. 0.00067 0.0017 mg/kg 104 78-114 Pyrene N.D. 0.00067 0.0017 mg/kg 91 69-116 Benzo(a)anthracene N.D. 0.00067 0.0017 mg/kg 97 74-112 Chrysene N.D. 0.00033 0.0017 mg/kg 99 79-111 Benzo(b)fluoranthene N.D. 0.00067 0.0017 mg/kg 104 70-125 Benzo(k)fluoranthene N.D. 0.00067 0.0017 mg/kg 100 72-124 Benzo(a)pyrene N.D. 0.00067 0.0017 mg/kg 93 70-109 Indeno(1,2,3-cd)pyrene N.D. 0.00067 0.0017 mg/kg 93 64-127 Dibenz(a,h)anthracene N.D. 0.00067 0.0017 mg/kg 93 46-133 Benzo(g,h,i)perylene N.D. 0.00067 0.0017 mg/kg 90 58-131 Batch number: 080990020A Sample number(s) : 5318601-5318613 Total TPH N.D. 4.0 12. mg/kg 80 66-113 Batch number: 080990041A Sample number(s) : 5318614-5318619 Total TPH N.D. 4.0 12. mg/kg 89 66-113 Batch number: 08099SLCO26 Sample number(s) : 5318614-5318619 Naphthalene N.D. 0.00067 0.0017 mg/kg 82 67-105 Acenaphthylene N.D. 0.00033 0.0017 mg/kg 80 67-100 Acenaphthene N.D. 0.00067 0.0017 mg/kg 85 73-104 Fluorene N.D. 0.00067 0.0017 mg/kg 89 75-110 Phenanthrene N.D. 0.00067 0.0017 mg/kg 91 76-109 Anthracene N.D. 0.00033 0.0017 mg/kg 81 70-103 Fluoranthene N.D. 0.00067 0.0017 mg/kg 88 78-114 Pyrene N.D. 0.00067 0.0017 mg/kg 92 69-116 Benzo(a)anthracene N.D. 0.00067 0.0017 mg/kg 85 74-112 Chrysene N.D. 0.00033 0.0017 mg/kg 95 79-111 Benzo(b)fluoranthene N.D. 0.00067 0.0017 mg/kg 94 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 86 70-109 Indeno(1,2,3-cd)pyrene N.D. 0.00067 0.0017 mg/kg 113 64-127 Dibenz(a,h)anthracene N.D. 0.00067 0.0017 mg/kg 114 46-133 Benzo(g,h,i)perylene N.D. 0.00067 0.0017 mg/kg 111 58-131 Batch number: B080941AA Sample number(s) : 5318605,5318607,5318610-5318619 Benzene N.D. 0.0005 0.005 mg/kg 93 91 84-115 3 30 Toluene N.D. 0.001 0.005 mg/kg 95 94 81-116 1 30 Ethylbenzene N.D. 0.001 0.005 mg/kg 89 87 82-115 2 30 Xylene (Total) N.D. 0.001 0.005 mg/kg 90 88 82-117 2 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.