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1 Lancaster Laboratories <br /> ti Where qualityis a science. <br />' Page 1 of 4 <br /> Quality Control Summary <br />' Client Name: ChevronTexaco Group Number: 830264 <br /> Reported: 11/25/02 at: 07:51 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL units %REC %REC Limits RPD RPD Max <br />' Batch number: 023160023A Sample number(s) : 3937820-3937825 <br /> TPH - DRO CA LUFT (Waters) N-D. 50. ug/l 94 98 54-120 4 20 <br /> Batch number: 02316A53A Sample number(s) . 3937821-3937826 <br /> TPH-GRO - Waters N.D. 50. ug/1 109 107 74-116 3 30 <br /> Batch number: 02316A53B Sample number(s) : 3937820 <br /> TPH-GRO - Waters N.D. 50- ug/l 109 107 74-116 3 30 <br /> Batch number: 023170010A Sample number(&) : 3937820-3937825 <br /> Total TPH N-D. 400. ug/1 85 81 71-117 5 20 <br /> TPH Motor Oil C16-C36 N.D. 400. ug/1 <br /> Batch number: 023170018A Sample number(s) : 3937820-3937823 <br /> Methanol (by Direct Injection) N.D. 200. ug/1 84 64-130 <br /> Batch number: 023250023A Sample number(s) : 3937824-3937825 <br /> Methanol (by Direct Injection) N.D. 200- ug/1 104 64-130 <br /> Hatch number: N023112AC Sample number(s) : 3937820-3937821 <br />' x0hanol N.D. 50. ug/1 81 43-159 <br /> thyl t-butyl ether N.D. .5 ug/1 96 77-127 <br /> -Isopropyl ether N.D. .5 ug/l 90 74-125 <br /> Ethyl t-butyl ether N.D- .5 ug/1 89 74-120 <br /> t-Amyl methyl ether N.D- .5 ug/l 91 71-114 <br />' t-Butyl alcohol N.D. 5, ug/1 89 59-139 <br /> Benzene N.D. .5 ug/1 102 85-117 <br /> 1,2-Dichloroethane N.D. .5 ug/l 98 77-132 <br /> Toluene N.D. .5 ug/1 104 85-115 <br /> 1,2-Dibromoethane N.D. .5 ug/1 94 61-114 <br /> Ethylbenzene N.D. -5 ug/l 104 82-119 <br /> Xylene (Total) N.D. .5 ug/1 104 84-120 <br /> Batch number: N023175AA Sample number(s) : 3937822-3937826 <br /> Ethanol N.D. 50. ug/1 66 43-159 <br />' Methyl t-butyl ether N.D. .5 ug/1 97 77-127 <br /> di-Isopropyl ether N.D. .5 ug/1 97 74-125 <br /> Ethyl t-butyl ether N.D. .5 ug/l 90 74-120 <br /> t-Amyl methyl ether N.D. .5 ug/l 92 71-114 <br /> t-Butyl alcohol N.D. 5. ug/l 75 59-139 <br /> Benzene N.D. .5 ug/1 108 85-117 <br /> 1,2-Dichloroethane N.D. .5 ug/1 104 77-132 <br /> Toluene N.D. .5 ug/1 110 85-115 <br /> 1,2-Dibromoethane N.D- .5 ug/1 93 81-114 <br /> Ethylbenzene N.D. -5 ug/1 112 82-119 <br /> Xylene (Total) N-D. .5 ug/1 111 84-120 <br /> Sample Matrix Quality Control <br />' Ms MSD MS/MSD RPD BKG DUP DUP Dup <br /> Analysis Namg %REC %REC Limits RPD MAX Conc ConRPD <br /> c RPD Max <br /> Outside of specification <br /> The result for one of both determinations was less than five times the LOQ- <br /> The background result was more than four times the spike added. <br />' <br /> Lancaster Laboratories,Inc. <br /> M� 2425 New Holland Pike <br />' PO Box 12425 <br /> Lancaster,PA 17605-2425 <br /> 717 65fi-2300 Fax:717-656-2681 2216 Rev,9111/00 <br />