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LancasterRe ort <br /> Laboratories Analysis <br /> 5 New Holland Pike PO Box 12425 Lancaster,PA 17605.2425*717-656 2300 Fax 717 656-2681*www lancaslerlabs Corn <br /> Page 4 of 7 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 884689 <br /> Reported 02/23/04 at 04 21 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BRG DUP DUP Dup <br /> RPD <br /> Analysis Name %REC %REC Limia RPD MA% Conc Conc RPD Marc <br /> bis(2-Chloroisopropyl)ether 86 90 49-145 4 30 <br /> Hexachloroethane 64 69 20-116 8 30 <br /> N-Nitroso-di-n-propylamine 69 72 61-110 4 30 <br /> Nitrobenzene 63 85 43-133 3 30 <br /> Isophorone 78 81 44-127 3' 30 <br /> bis(2-Chloroethoxy)methane 90 91 75-116 2 30 <br /> 1,2,4-Trichlorobenzene 81 81 53-113 1 30 <br /> Naphthalene 79 83 63-107 5 30 <br /> Hexachlorobutadiene 70 75 31-122 7 30 <br /> Hexachlorocyclopentadiene 70 71 5-130 1 30 <br /> 2-Chloronaphthalene 80 80 64-114 0 30 <br /> Acenaphthylene 8o 80 27-134 0 30 <br /> Dimethylphthalate -24* 34 2-132 36* 30 <br /> 2,6-Dinitrotoluene 82 83 47-128 0 30 <br /> Acenaphthene 85 86 59-120 1 30 <br /> 2,4-Dinxtrotoluene 86 86 43-145 1 30 <br /> Fluorene 78 79 52-121 1 30 <br /> 4-Chlorophenyl-phenylether 76 78 64-109 3 30 <br /> Diethylphthalate 81 83 35-124 3 30 <br /> N-Nitrosodzphenylamine 77 77 69-105 0 30 <br /> Wenanthrene <br /> ramophenyl-phenylether 83 85 70-109 3 30 <br /> achlorobenzene 80 82 65-114 3 30 <br /> 75 77 56-125 2 30 <br /> Anthracene 78 78 60-117 0 30 <br /> Di-n-butylphthalate 76 78 71-107 2 30 <br /> Fluoranthene 75 77 70-104 3 30 <br /> Pyrene 89 91 67-112 2 30 <br /> Butylbenzylphthalate 89 91 52-129 2 30 <br /> Benzo(a)anthracene 86 Be 72-108 2 30 <br /> Chrysene 81 82 73-108 2 30 <br /> 3,31-Dichlorobenzidine 84 85 30-122 1 30 <br /> bis(2-Ethylhexyl)phthalate 75 76 64-130 1 30 <br /> Di-n-octylphthalate 70 72 64-119 3 30 <br /> Benzo(b)fluoranthene 77 79 72-109 4 30 <br /> Benzo(k)fluoranthene 77 8o 73-111 4 30 <br /> Benzo(a)pyrene 78 81 77-110 4 30 <br /> Indeno(1,2,3-cd)pyrene 83 B6 69-115 3 30 <br /> Dibenz(a,h)anthracene 87 91 81-118 5 30 <br /> Benzo(9,h,i)perylene 85 89 72-114 4 30 <br /> 2-Methylphenol 64 65 34-119 1 30 <br /> 4-Methylphencl 63 63 30-114 1 30 <br /> Benzyl alcohol 77 79 61-89 2 30 <br /> Benzoic acid 79* 69* 6-60 12 30 <br /> Batch number 04047112601A Sample number(s) 4216136 <br /> TRPH 416 1 95 106 39-132 10 14 N D 0 55 200* (1) 34 <br /> Batch number 040481848001 Sample number(s) 4216137 20 <br /> Cadmium 103 107 87-117 9 20 N D N D 0 (1) 20 <br /> Chromium 101 103 86-118 2 20 N D N D 0 {1) 20 <br /> Lead 111 113 87-118 2 20 N D N D 0 (1) 20 <br /> Nickel 101 104 91-111 2 20 N D N D 0 (1) <br /> Zinc <br /> 109 111 80-120 2 20 N D N D 0 (1) 20 <br /> Batch number 04049Ao7A Sample number(s) 4216136 <br /> *-Outside of specification <br /> The result for one or both determinations was less than five times the LOQ <br /> The background result was more than four times the spike added <br />