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Lancasterort <br /> Laboratories Analysis Re p <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 6 <br /> i <br /> Quality Control Summary <br /> Client Name: Chevron`i'exaco Group Number: 957863 <br /> Reported: 09/15/05 at 01:23 PM <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 <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Units %RRC 3REC Limits RPD RFD Max <br /> Batch number: 052460003A Sample number(s) : 4596145-4596155 <br /> Total TPH N.D. 40. ug/l 95 99 57-115 5 20 <br /> TPH Motor Oil C16-C36 N.D. 40. ug/l <br /> Batch number: 052460004A Sample number(s) : 4596145-4596155 <br /> TPH - DRO CA LUFT (waters) N.D. 29. ug/l 83 85 64-125 3 20 <br /> Batch number: 052SOA07A Sample number(s) : 4596144-4596147,4596149-4596150 <br /> TPH-GRO - Waters N.D. 50. ug/l 94 97 70-130 4 30 <br /> ch number: 052510016A Sample number(s) . 4596145-4596155 <br /> thanol (by Direct injection) N.D. 200. ug/1 100 80-120 <br /> -Batch number: 05252A08A Sample number(s) : 4596151 <br /> TPH-GRO - Waters N.D. 50. ug/l 116 123 70-130 6 30 <br /> Batch number: 05252AOBB Sample number(s) : 4596154-4596155 <br /> TPH-GRO - Waters N.D. 50. ug/l 116 123 70-130 6 30 <br /> Batch number. 05252AOSC Sample number(s) : 4596148,4596152-4596153 <br /> TPH-GRO - Waters N.D. 50. ug/1 116 123 70-130 6 30 <br /> Batch number: Z052493AA Sample number(s) : 4596145-4596152 <br /> Ethanol N.D. 5o. ug/l 82 30-155 <br /> Methyl Tertiary Butyl Ether N.D. 0.5 ug/l 95 77-127 <br /> di-Isopropyl ether N.D. 0.5 u9/1 90 67-130 <br /> Ethyl t-butyl ether N.D. 0.5 ug/l 96 74-120 <br /> t-Amyl methyl ether N.D. 0.5 ug/l 99 79-113 <br /> t-Butyl alcohol N.D. 5. ug/l 97 60-133 <br /> Benzene N.D. 0.5 ug/l 96 85-117 <br /> 1,2-Dichloroethane N.D. 0.5 ug/l 104 77-132 <br /> Toluene N.D. 0.5 ug/l 96 85-115 <br /> 1,2-Dibromoethane N.D. 0.5 ug/l 94 81-114 <br /> Ethylbenzene N.D. 0.5 ug/l 99 82-119 <br /> Xylene (Total) N.D. 0.5 ug/l 100 83-113 <br /> Batch number: Z052501AA Sample number(s) : 4596153-4596155 <br /> Ethanol N.D. 50. ug/l 135 30-155 <br /> Methyl Tertiary Butyl Ether N.D. 0.5 ug/l 97 77-127 <br /> di-Isopropyl ether N.D. 0.5 ug/l 90 67-130 <br /> Ethyl t-butyl ether N.D. 0.5 ug/l 96 74-120 <br /> t-Amyl methyl ether N.D. 0.5 ug/l 100 79-113 <br /> t-Butyl alcohol N.D. 5. ug/l 98 60-133 <br /> Benzene N.D. 0.5 ug/l 94 85-117 <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ. <br /> The background result was more than four titres the spike added. <br />