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LancasterAnalysis Re or# <br /> Laboratories Ana 1 y p <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 17605-2425•717 6562300 Fax 717 656 2681 www lancasterlab5 COM <br /> Page 2 of 3 <br /> Quality Control Summary <br /> Clxent Name ChevronTexaco Group Plumber 901486 <br /> Reported 07/08/04 at 03 31 PM <br /> Sample Matrix Quality Control <br /> MS MCD WMGD RPD PKG DUP DUP Dup RPD <br /> Analysis Name_ %REC 16REC Limits RPD MAX Cono Cona RPD Max <br /> di-isopropyl ether 105 105 75-130 0 30 <br /> Ethyl t-butyl ether 106 105 78-119 1 30 <br /> t-Amyl methyl ether 108 108 77-117 0 30 <br /> t-Butyl alcohol 109 106 51-147 2 30 <br /> Benzene 109 111 83-128 1 30 <br /> 1 2-Dichloroethane 103 103 73-136 0 30 <br /> Toluene 108 108 83-127 0 30 <br /> 1 2-Dibromoethane 98 101 78-120 2 30 <br /> -_-- Ethy lbenzene110 - 110 _ 82-_129 1_ - __30_ <br /> Xylene (Total) 108 108 82-130 _ 0 30 <br />�Batch-number �P041632AA Samplewnumber(s)_ X4300331 <br /> t-Butyl alcohol 105 102 51-147 2 30 <br /> Batch=number —P041841AA Sample_number(s)_4300330 <br /> Methyl Tertiary Butyl Ether 105 103 69-134 2 30 <br /> Benzene 110 109 83-128 1 30 <br /> Toluene 109 108 83-127 1 30 <br /> Ethylbenzene 109 108 82-129 1 30 <br /> Xylene (Total) 108 109 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 04180A0'7C <br /> Trifluorotoluene-F <br /> 4300330 108 <br /> 4300331 121 <br /> 4300332 228* <br /> 4300333 112 <br /> 4300334 111 <br /> 4300335 128 <br /> 4300336 126 <br /> Blank 105 <br /> LCS 133 <br /> LCSD 134 <br /> MS 133 <br /> Limits 57-146 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 041SIA56A <br /> Trifluorotoluene-F <br /> 4300337 108 <br /> 4300338 112 <br /> 4300339 118 <br /> Blank 114 <br /> LCS 116 <br /> LCSD 115 <br /> MS 144 <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 />