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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: 1135073 Reported: 03/17/09 at 10:32 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: 090680019A Sample number(s) : 5616378-5616385 Total TPH N.D. 4.0 12 mg/kg 94 94 66-113 0 20 C10-C36 N.D. 4.0 12 mg/kg Batch number: 09068SLB026 Sample number(s) : 5616378-5616385 Naphthalene N.D. 0.00067 0.0017 mg/kg 84 84 67-105 0 30 Acenaphthylene N.D. 0.00033 0.0017 mg/kg 92 91 67-100 1 30 Acenaphthene N.D. 0.00067 0.0017 mg/kg 88 88 59-102 0 30 Fluorene N.D. 0.00067 0.0017 mg/kg 94 94 75-110 0 30 Phenanthrene N.D. 0.00067 0.0017 mg/kg 94 93 76-109 0 30 Anthracene N.D. 0.00033 0.0017 mg/kg 85 84 53-105 1 30 Fluoranthene N.D. 0.00067 0.0017 mg/kg 93 94 78-114 0 30 Pyrene N.D. 0.00067 0.0017 mg/kg 93 92 69-116 2 30 Benzo(a)anthracene N.D. 0.00067 0.0017 mg/kg 89 88 74-112 1 30 Chrysene N.D. 0.00033 0.0017 mg/kg 92 92 79-111 0 30 Benzo(b)fluoranthene N.D. 0.00067 0.0017 mg/kg 106 113 70-125 7 30 Benzo(k)fluoranthene N.D. 0.00067 0.0017 mg/kg 100 103 72-124 3 30 Benzo(a)pyrene N.D. 0.00067 0.0017 mg/kg 94 95 70-109 1 30 Indeno(1,2,3-cd)pyrene N.D. 0.00067 0.0017 mg/kg 107 111 47-140 4 30 Dibenz(a,h)anthracene N.D. 0.00067 0.0017 mg/kg 109 114 49-140 4 30 Benzo(g,h,i)perylene N.D. 0.00067 0.0017 mg/kg 103 107 44-138 3 30 Batch number: A090701AA Sample number(s) : 5616378-5616385 Benzene N.D. 0.0005 0.005 mg/kg 101 95 83-116 6 30 Toluene N.D. 0.001 0.005 mg/kg 98 92 81-112 7 30 Ethylbenzene N.D. 0.001 0.005 mg/kg 98 92 79-110 7 30 Xylene (Total) N.D. 0.001 0.005 mg/kg 99 93 78-108 7 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: A090701AA Sample number(s) : 5616378-5616385 UNSPK: P615277 Benzene 101 55-143 Toluene 97 50-146 Ethylbenzene 97 44-141 Xylene (Total) 96 44-136 *-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.