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LancasterAnalysis Report <br /> Laboratories Y p <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 17605-2425•717-656 2300 Fax 717-656-2681•www lancaSterlakbs com . <br /> Page 1 of 4 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 980350 <br /> Reported 03/11/06 at 02 13 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 LCB LCSD LCS/LCSD <br /> Analysis Name Result MDL Units 86REC %RBC Limits RPD RPD Max <br /> --Batch-number 06066A20A Sample number(s)_ 4721782 <br /> TPH-GRO - Waters - N D - 50 ug/l - 118- - 114--- --- 70-130- -- -4----- =30 <br /> Batch=number =0606682oA Sample�number(s)_ :.4721783 <br /> __TPH-GRO - Waters N D 50 ug/l III 107-707130 30 <br /> Batch-number�06067A0BA-_ -- -N Dple =numb50r( s),=4721197/80^472178 70-130 — - <br /> TPH-GRO - Waters <br /> Batch number 0606BA16A Sample number(s) 4721784-4721785 <br /> TPH-GRO - Waters N D 50 ug/l 106 106 70-130 0 30 <br /> Batch number Z060663AA Sample number(s) 4721781-4721786 35-168 <br /> Ethanol N D 50 u9/1 111 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/l 92 73-119 <br /> di-Isopropyl ether N D 0 5 ug/l 92 67-130 <br /> Ethyl t-butyl ether N D 0 5 ug/l 94 74-120 <br /> t-Amyl methyl ether N D 0 5 ug/l 96 79-113 <br /> t-Butyl alcohol N D 5 ug/l 87 69-127 <br /> Benzene N D 0 5 ug/l 95 85-117 <br /> 1,2-Dichloroethane N D 0 5 ug <br /> 98 77-132 <br /> Toluene N D 0 5 ug/l 98 85-115 <br /> 1,2-Dibromoethane N D 0 5 ug/l 94 81-114 <br /> Ethylbenzene N D 0 5 ug/l 98 82-119 <br /> Xylene (Total) N D 0 5 ug/l 101 83-113 <br /> Batch number Z060671AA Sample number(s) 4721780 35-168 <br /> Ethanol N D 50 ug/l 108 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/l B6 73-119 <br /> di-Isopropyl ether N D 0 5 ug/l B5 67-130 <br /> Ethyl t-butyl ether N D 0 5 ug/l 87 74-120 <br /> t-Amyl methyl ether N D 0 5 ug/l 92 79-113 <br /> t-Butyl alcohol N D 5 ug/l 87 69-127 <br /> Benzene N D o 5 ug/l 91 B5-117 <br /> 1,2-Dichloroethane N D 0 5 ug/l 95 77-132 <br /> Toluene N D 0 5 ug/l 95 85-215 <br /> 1,2-Dibromoethane N D 0 5 ug/l 91 81-114 <br /> Ethylbenzene N D 0 5 ug/l 95 82-119 <br /> Xylene {Total) N D 0 5 ug/l 98 B3-113 <br /> Sample Matrix Quality Control <br /> Unspiked (UNSPK) = the sample used in conjunction with the matrix spike <br /> Background (BKG) = the sample used in conjunction with the duplicate <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <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 />