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f � <br /> Lancaster Laboratories Page 1 of 4 <br /> Where quality,is a science. <br /> Quality Control Summary <br /> Client Name: ChevronTexaco Group Number: 818893 <br />' Reported: 08/27/02 at 06 : 05 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: 022270002A Sample number(s) : 3878885-3878891 <br /> TPH - DRO CA LUFT (Waters) N.D. 50. ug/l 88 86 54-120 1 20 <br /> Batch number: 022270003A Sample number(s) : 3878885-387BB91 <br /> Total TPH N-D. 200. ug/l 97 92 60-120 5 20 <br /> TPH Motor Oil C16-C36 N.D- 400. ug/l <br /> Batch number: 02227A56A Sample number(s) : 3878885-3878889,3878892 <br /> TPH-GRO - Waters N.D. 5o. ug/l 83 79 74--116 4 30 <br />' Batch number: 02227A56B Sample number(s) : 3878890-3878891 <br /> TPH-GRO - Waters N.D. 50. ug/1 83 79 74-116 4 30 <br /> Batch number: 022310025A Sample number(s) : 3878885-3876891 <br />' Methanol (by Direct Injection) N.D. 200. ug/1 68 64-130 <br /> Batch number: N022281AA Sample number(s) : 3878885-3878892 <br /> Ethanol N.D. 50. ug/l 106 43-159 <br /> Methyl t-butyl ether N.D. .5 ug/l 100 77-127 <br />' di-Isopropyl ether N.D. -5 ug/l 103 74-125 <br /> Ethyl t-butyl ether N.D. .5 ug/l 87 74-120 <br /> t-Amyl methyl ether N.D. .5 ug/1 91 71-114 <br /> t-Butyl alcohol N.D. 5. ug/l 96 59-139 <br /> Benzene N.D. .5 ug/l 103 85-117 <br /> ,2-Dichloroethane N.D. .5 ug/l 111 77-132 <br /> luene N.D. .5 ug/1 102 85-115 <br /> 1 <br /> 2-Dibromoethane N.D. .5 ug/1 98 81-114 <br /> thylbenzene N.D. .5 ug/l 102 82-119 <br /> Xylene (Total) N.D. .5 ug/1 104 84-120 <br />' Batch number: N022281AB Sample number(s) : 3878889-3876891 <br /> Benzene N.D. .5 ug/l 103 85-117 <br /> Toluene N.D. .5 ug/1 102 85-115 <br /> Xylene (Total) N.D. .5 ug/1 104 84-120 <br />' Sample Matrix Quality Control <br /> NS MSD MS/MSD RPD BKG DUP DIIP Dup <br /> RPD <br /> Analysis Name RSC $ASC Limits RPD MAX COx1C Cone RPD Max <br /> Batch number: 02227A56A Sample number(s) : 3878885-3878889,3878892 <br /> TPH-GRO - Waters 89 74-132 <br />' Batch number: 02227A56B Sample number(s) : 3878890-3878891 <br /> TPH-GRO - Waters 89 74-132 <br /> Batch number: 022310025A Sample number(s) : 38788B5-3878891 <br /> Methanol (by Direct Injection) 88 84 58-137 5 20 <br /> Batch number: N022281AA Sample number(s) : 3878885-3878892 <br /> Ethanol 104 104 34-163 0 30 <br /> Methyl t-butyl ether (2) (2) 69-134 0 30 <br /> di-Isopropyl ether 106 110 68-133 3 30 <br /> Ethyl t-butyl ether 97 99 73-123 3 30 <br /> t-Amyl methyl ether 9B 102 69-118 4 30 <br /> t-Butyl alcohol 96 98 51-148 2 30 <br /> Outside of specification <br /> The result for one or both determinations was less than five times the LOQ. <br /> The background result was more than four times the spike added. <br /> 1 <br /> Lancaster Laboratories,Inc. <br /> M E M B E R 2425 New Holland Pike <br /> Box 12425 <br /> La <br /> � Lancesrer,NA 17601.2425 <br /> 717.656-2304) Fax-717-556-2681 2216 Rev.9111/00 <br />