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Lancaster Laboratories Analysis Report 2425 New HoUand Pike PO Box 12425 Lancasler PA 17605-2425•717 656 2300 Fax 717 656 2681 www lancasterlabs Com Pagel of 8 Quality Control Summary Client Name ChevronTexaco Group Number 905571 Reported —08/10/04-at 06 13 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 to the method Laboratory Compliance Quality Control Blank Blank Report LCS LCSD LCS/LCSt) Analysis Name Result 74DL Units $REC %RRC Limits RPD RPD Max Batch number 042120007A , Sample numbers) 4319454,4319456-4319458 TPH - DRO CA LUFT (Waters) N D 50 ug/l 86 91 61-126 6 20 Batch number 04212A07D _ Sample number(s) 4319453-431_9454,4319456-4319458 TPH-GRO - Waters N D 50 ug/1 99 97 70-130 2 30 Batch number 04212WAGO26 Sample number(s) 4319454 Aniline N D 1 ug/l 84 83 35-102 1 30 4-Chloroaniline N D 25 ug/1 90 as- 32-120 5 30 Dibenzofuran N D 5 0 ug/1 96 91 65-110 5 30 2-Methylnaphthalene N D 5 ug/1 86 86 54-110 1 30 2-Nitroaniline N D 10 u9/1 99 97 73-115 2 30 3-Nitroaniline N D 10 ug/l 97 91 64-113 7 30 4-Nitroaniline N D 20 ug/1 91 90 56-107 1 30 2,4,5-Trichlorophenol N D 10 ug/l 93 86 70-115 7 30 2-Chlorophenol N D 5 ug/1 94 90 63-112 4 30 Phenol N D 5 ug/l 42 40 24-65 4 30 ` 2-Nitrophenal- - - ='N-D= 10 - -ug/1- -101=---98--68-118 = 3-- 30-_ - 2,4-Dimethylphenol N D 5 ug/l 73 75 60-107 3 30 2,4-Dichlorophenol N D 5 ug/l 93 85 66-110 10 30 - -4=Chloro-3=methylphenar -- =""-N"D�==--5- - ug/1- ;91 -- -=67 x"-70-112 - —4'-=-` 30--------- 2,4,6-Trichlorophenol N D 10 ug/1 88 82 69-111 7 30 2,4-Dinitrophenol N D 20 ug/l 88 83 46-121 5 30 4-Nitrophenoi N D 10- - ug/l 35 36 19-76 2 30 4,6-Dinitro-2-methylphenol N D 10 ug/1 95 93 56-130 2 30 Pentachlorophenol N D 10 ug/l 70 65 48-108 8 30 N-Nitrosodimethylamine N D 5 ug/1 56 58 39-84 4 30 —bis(2-Chloroethyl)ether N-B 5 ug/1 91 87-57-110 4 30 1,3-Dichloroben2ene N ❑ 5 ug/l 81 80 35-107 2 30 1,4-Dichlorobenzene N D 10 ug/I 84 79 37-109 6 30 1,2-Dichlorobenzene N D 5 ug/l 83 80 42-105 4 30 bis(2-Chloroisopropyl)ether N D 5 ug/l 105 102 55-130 3 30 Hexachloroethane N D 5 ug/l 70 69 18-110 1 30 N-Nitroso-di-n-propylamine N D 5 ug/l 88 85 56-109 4 30 Nitrobenzene N D 5 ug/l 91 87 61-111 5 30 Isophorcne N D 5 ug/l 89 84 63-105 5 30 bis(2-Chloroethoxy)methane N D 5 ug/1 99 96 69-119 3 30 1,2,4-Trichlorobenzene N D 5 ug/l 87 83 45-109 5 30 Naphthalene N D 5 ug/l 89 84 58-108 6 30 Hexachlorobutadiene N D 10 ug/1 69 64 15-119 8 30 Hexachlorocyclopentadiene N D 10 u9/1 59 57 12-140 2 30 2-Chloronaphthalene N D 5 ug/1 8o 75 60-107 6 30 Acenaphthylene N D 5 ug/1 96 90 65-120 7 30 Dimethylphthalate N D 5 ug/1 87 83 34-114 5 30 *-Outside of specification (1) The result for one or both determinations was less than five times the LOQ (2) The background result was more than four times the spike added .