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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 4 REVISED Quality Control Summary Client Name: Chevron Environmental Mgt. Co. Group Number: 1105583 Reported: 09/04/08 at 01:58 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: 08231SLGO26 Sample number(s) : 5442219-5442229 Naphthalene ND 0.00067 0.0017 mg/kg 71 67-105 Acenaphthylene ND 0.00033 0.0017 mg/kg 73 67-100 Acenaphthene ND 0.00067 0.0017 mg/kg 76 73-104 Fluorene ND 0.00067 0.0017 mg/kg 82 75-110 Phenanthrene ND 0.00067 0.0017 mg/kg 81 76-109 Anthracene ND 0.00033 0.0017 mg/kg 70 70-103 Fluoranthene ND 0.00067 0.0017 mg/kg 86 78-114 Pyrene ND 0.00067 0.0017 mg/kg 79 69-116 Benzo(a)anthracene ND 0.00067 0.0017 mg/kg 80 74-112 Chrysene ND 0.00033 0.0017 mg/kg 85 79-111 Benzo(b)fluoranthene ND 0.00067 0.0017 mg/kg 100 70-125 Benzo(k)fluoranthene ND 0.00067 0.0017 mg/kg 97 72-124 Benzo(a)pyrene ND 0.00067 0.0017 mg/kg 86 70-109 Indeno(1,2,3-cd)pyrene ND 0.00067 0.0017 mg/kg 101 64-127 Dibenz(a,h)anthracene ND 0.00067 0.0017 mg/kg 103 63-138 Benzo(g,h,i)perylene ND 0.00067 0.0017 mg/kg 97 58-131 Batch number: 082330007A Sample number(s) : 5442219-5442229 Total TPH ND 4.0 12 mg/kg 83 66-113 Batch number: B082311AA Sample number(s) : 5442219-5442221,5442224-5442226,5442228-5442229 Benzene ND 0.0005 0.005 mg/kg 96 99 84-115 3 30 Toluene ND 0.001 0.005 mg/kg 94 98 81-116 3 30 Ethylbenzene ND 0.001 0.005 mg/kg 94 98 82-115 4 30 Xylene (Total) ND 0.001 0.005 mg/kg 94 97 82-117 4 30 Batch number: R082311AB Sample number(s) : 5442222-5442223,5442227 Benzene ND 0.025 0.25 mg/kg 96 96 84-115 1 30 Toluene ND 0.050 0.25 mg/kg 98 98 81-116 0 30 Ethylbenzene ND 0.050 0.25 mg/kg 99 98 82-115 1 30 Xylene (Total) ND 0.050 0.25 mg/kg 98 98 82-117 0 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: 08231SLGO26 Sample number(s) : 5442219-5442229 UNSPK: 5442222 Naphthalene -32677 -16813 27-145 14 30 (2) (2) *-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.