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Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike,PO Box 12425,Lancaster.PA 17605-2425•717-656-2300 Fax 717-656-2681•www.lancastertabs.com <br /> Page I of 2 <br /> Quality Control Summary <br /> 4 I <br /> Client Name: ChevronTexaco Group Number: 925042 <br /> Reported: 12/27/04 at 11:17 AIS? <br /> I� <br /> Matrix QC may not be reported if site-specific QC samples were not <br /> submitted. In these situations,to demonstrate precision and accuracy at <br /> a batch level,a LCS/LCSD was performed,unless otherwise specified in the <br /> method. <br /> Laboratory Compliance Quality Control R <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL units %REC %REC Limits RPD RAD Max <br /> Batch number: 04351AOBD Sample number(s) 4429663-4429664 <br /> TPH-GRO - Waters N.D. 50. ug/l 106 110 70-130 4 30 <br /> Batch number: Z043531AA Sample number(s) : 4429663-4429664 <br /> Ethanol N.D. 50, u9/1 103 46-145 <br /> Methyl Tertiary Butyl Ether N.D. 0.5 ug/l 89 77-127 <br /> di-Isopropyl ether N.D. 0.5 ug/l 102 67-130 <br /> Ethyl t-butyl ether N.D. 0.5 ug/l 93 74-120 <br /> t-Amyl methyl ether N.D. 0.5 ug/l 88 79-113 <br /> t-Butyl alcohol N.D. S. ug/1 86 57-141 r <br /> Benzene N.D. 0.5 ug/l 95 85-117 <br /> 1,2-Dichloroethane N.D- 0.5 ug/l 89 77-132 <br /> Toluene, N.D. 0.5 ug/l 99 85-115 <br /> 1,2-Dibromoethane N-D. 0.5 ug/l 94 81-114 <br /> Ethylbenzene N.D. 0.5 ug/l 97 82-119 <br /> Xylene (Total) N.D. 0.5 ug/l 96 83-113 ' <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BRG DUP DUP Dup RPD <br /> Analysis Name PRBC $REC Limits RPB MA7t Conc Conc RPD Max <br /> Batch number: 04351AOBD Sample number(s) ; 4429663-4429664 <br /> TPH-GRO - Waters 139 63-154 <br /> Batch number: Z043531AA Sample number(s) : 4429663-4429664 <br /> Ethanol 96 94 33-153 2 30 <br /> Methyl Tertiary Butyl Ether 93 91 69-134 2 30 <br /> di-Isopropyl ether 109 108 75-130 1 30 <br /> Ethyl t-butyl ether 98 97 78-119 1 30 e <br /> t-Amyl methyl ether 91 90 77-117 1 30 <br /> t-Butyl alcohol 86 86 51-147 0 30 <br /> Benzene 101 101 83-128 0 30 <br /> 1,2-Dichloroethane 92 90 73-136 1 30 <br /> Toluene 105 i05 83-127 0 30 <br /> 1,2-Dibromoethane 95 94 78-120 1 30 <br /> Ethylbenzene 103 102 82-129 0 30 <br /> Xylene (Total) 101 100 82-130 0 30 <br /> + { <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 /> :_J <br />