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*41 Lancaster orf <br /> Laboratories Analysis Rep <br /> 2425 New Holland Pike PQ Box 12425 Lancaster PA 17605-2425•717 656 2300 Fax 717-656-2681 www lancasterlabs com <br /> Page 2 of S <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 905571 <br /> Reported 08/10/04 at 06 13 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL units %REC %REC Limits RPD RPD Max <br /> 2,6-Dinitrotoluene iT D 10 ug/1 96 90 70-108 7 30 <br /> Acenaphthene N D 5 ug/1 98 91 68-111 7 30 <br /> 2,4-Dinitrotoluene N D 10 u9/1 103 100 75-122 3 30 <br /> Fluorene N D 5 ug/l 87 85 61-116 2 30 <br /> 4-Chlorophenyl-phenylether N D 5 ug/1 89 87 65-110 2 30 <br /> M ethylphthalate N D 5 ug/l 89 88 61-110 1 30 <br /> N-Nitrosodiphenylamne N D 5 ug/1 92 90 63-104 2 30 <br /> 4-Bromophenyl-phenylether N D 5 ug/1 97 93 67-110 4 30 <br /> Hexachlorobenzene N D 10 ug/l 96 92 68-113 5 30 <br /> Phenanthrene N D 5 ug/1 94 90 68-111 4 30 <br /> Anthracene N D 5 ug/1 96 89 68-108 7 30 <br /> Di-n-butylphthalate N D 10 ug/1 94 91 63-113 3 30 <br /> Fluoranthene N D 5 ug/1 89 84 66-108 5 30 <br /> Pyrene N D 5 ug/l 96 95 68-114 0 30 <br /> Butylbenzylphthalate N D 50 ug/l 97 97 63-120 0 30 <br /> Benzo(a)anthracene N D 5 ug/1 97 94 72-112 3 30 <br /> Chrysene N D 5 ug/1 97 93 70-111 5 30 <br /> 3,31-Dichlerobenzidine N D 10 ug/1 100 94 37-117 6 30 <br /> bis(2-Ethylhexyl)phthalate N D 10 ug/1 103 101 62-126 2 30 <br /> jWDi-n-octylphthalate N D 10 ug/1 91 92 56-11B 2 30 <br /> enzo(b)fluoranthene N D 5 ug/1 93 91 67-117 1 30 <br /> 6enzo(k)fluoranthene N D 5 ug/1 97 95 67-120 1 30 <br /> Benzo(a)pyrene N D 5 ug/1 95 94 68-121 2 30 <br /> Indeno(1,2,3-cd)pyrene N D 10 ug/1 93 93 67-122 1 30 <br /> Dibenz(a,h)anthracene N D 10 ug/I 103 100 71-129 3 30 <br /> Benzo(g h i)perylene N D 5 ug/l 95 94 67-121 1 30 <br /> 2-Methylphenol N D 5 ug/1 88 84 56-105 5 30 <br /> 4-Methylphenol N D 5 ug/l 77 74 51-98 4 30 <br /> Benzyl alcohol N D 5 ug/l 57 55 54-100 3 30 <br /> Benzoic acid N D 10 ug/1 48 46 6-73 6 30 <br /> Batch number 04215112601A Sample number($) 4319454 <br /> TRPH 418 1 N D 0 40 mg/1 97 94 54-113 3 14 <br /> Batch number 042161848004 Sample numbers) 4319455 <br /> Cadmium N D 0 00076 mg/l 100 97-111 <br /> Chromium N D 0 0025 mg/l 99 95-112 <br /> Lead N D 0 0100 mg/l 102 93-110 <br /> Nickel N D 0 0031 mg/1 100 93-110 <br /> Zinc N D 0 0048 mg/l 100 94-112 <br /> Batch number N042151AB Sample number(s) 4319454 <br /> Ethanal N D 500 ug/l 92 46-145 <br /> Methyl Tertiary Butyl Ether N D 2 ug/1 92 77-127 <br /> di-Isopropyl ether N D 2 ug/1 91 67-130 <br /> Ethyl t-butyl ether N D 2 ug/l 95 74-120 <br /> t-Amyl methyl ether N D 2 ug/l 97 79-113 <br /> t-Butyl alcohol N D 100 ug/l 97 57-141 <br /> Dichlorodifluoromethane N D 2 ug/l 86 53-184 <br /> Chloromethane N D 2 ug/l 87 66-143 <br /> vinyl Chloride N D 1 ug/1 85 71-134 <br /> Bromomethane N D 2 ug/1 84 55-131 <br /> Chloroethane N D 2 ug/1 82 59-133 <br /> Trichlorofluoromethane N D 2 u9/1 87 59-137 <br /> 1,1-Dichlaroethene N D 1 ug/l 100 79-130 <br /> *-Outside of specification <br /> .(1) The result for one or both determinations was less than five times the LOQ <br /> (2) The background result was more than four times the spike added <br />