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Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike PQ Bout 12425 Lancasler PA 17605-2425 717 656 2300 Fax 717-656 2681 www lancasterlabs com <br /> Page 1 of 5 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 930450 <br /> Reported 02/15/05 at 08 46 AM <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 PIDL Units %REC %RBC Lxmxts RPD RPD Max <br /> Batch number 05034112601A Sample number(s) 4458362 <br /> TRPH 418 1 N D 0 40 mg/l 90 87 54-113 4 14 <br /> Batch number 05037AOBC Sample number(S) 4458353-4458358 <br /> TPH-GRO - Waters N D 50 ug/l 104 103 70-130 1 30 <br /> Batch number 050380006A Sample number(s) 4458354,4458356 4458358-4458361 <br /> TPH-DRO CALUFT(Waters) N D 50 ug/l 91 91 61-126 0 20 <br /> atch number 050380026A Sample numberls) 4456358-4458361 <br /> ethanol (by Direct Infection) N D 1000 ug/l 104 76-119 <br /> Batch number 0503SA08A Sample number(s) 4458359 <br /> TPH-GRO - Waters N D 50 ug/1 98 100 70-130 2 30 <br /> Batch number OS03BAOSS Sample number(s) 4458360-4458362 <br /> TPH-GRO - Waters N D 50 ug/l 96 100 70-130 2 30 <br /> Batch number ZOS0353AA Sample number(s) 4458358-4458361 <br /> Ethanol N D 500 ug/l 70 46-145 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 98 77-127 <br /> di-Isopropyl ether N D 2 ug/l 75 67-130 <br /> Ethyl t-butyl ether N D 2 ug/l 92 74-120 <br /> t-Amyl methyl ether N D 2 ug/l 104 79-113 <br /> t-Butyl alcohol N D 100 ug/1 102 57-141 <br /> Benzene N D 5 ug/i 92 85-117 <br /> 1 2-Dichloroethane N D 2 ug/l 109 77-132 <br /> Toluene N D 5 ug/1 94 85-115 <br /> 1,2-Dibromoethane N D 2 ug/l 100 81-114 <br /> Ethylbenzene N D 5 ug/l 98 82-119 <br /> Xylene (Total) N D 5 ug/l 102 83-113 <br /> Batch number Z050382AA Sample number(s) 4458353-4458356 <br /> Methyl Tertiary Butyl Ether N D 2 ug/1 88 77-127 <br /> Benzene N D 5 ug/1 91 85-117 <br /> Toluene N D 5 ug/l 94 65-115 <br /> Ethylbenzene N D 5 ug/1 94 82-119 <br /> Xylene (Total) N D 5 ug/1 98 83-113 <br /> Batch number Z050393AA Sample number(s) 4458357,4456362 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 97 77-127 <br /> Benzene N D 5 ug/1 101 85-117 <br /> Toluene N D 5 ug/1 103 85-115 <br /> Ethylbenzene N D 5 ug/1 103 82-119 <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 /> i <br /> i <br />