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Lancaster Laboratories <br />' <br /> Where quality is a science.a q <br /> Page 1 of 4 <br /> Quality Control Summary <br /> Client Name: ChevronTexaco Group Number: 828797 <br /> Reported: 11/12/02 at 03 :25 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result ML- Units %RBC %RBC Limits RPD RPD Max <br />' Batch number: 023040026A Sample number(a) 3930154-3930160 <br /> TPH - ARO CA LUFT (Waters) N.D. 50- ug/l 93 98 54-120 5 20 <br /> Batch number: 023040027A Sample number(s) : 3930154-3930160 <br /> Total TPH N.D. 400. ug/l 81 88 71-117 8 20 <br /> TPH Motor Oil C16-C36 N.D. 400. ug/l <br /> Batch number: 02304A16A Sample number(s) : 3930154-3930156,3930159-3930161 <br /> TPH-GRO - Waters N.D. 50. ug/i 114 110 74-116 3 30 <br /> Batch number: 02304A16B Sample number(s) : 3930157-3930158 <br /> TPH-GRO - Waters N.D. 50. ug/l 114 110 74-116 3 30 <br /> Batch number: 023100039A Sample number(s) : 3930154-3930160 <br /> Methanol (by Direct Injection) N.D. 200- ug/l 96 64-130 <br /> Batch number: N023071AA Sample number(s) : 3930154-3930155 <br /> Ethanol N.D. 50. ug/l 102 43-159 <br /> Methyl t-butyl ether N.D. .5 ug/l 102 77-127 <br /> z Isopropyl ether N.D. .5 ug/1 93 74-125 <br /> thyl t-butyl ether N.D. .5 ug/l 93 74-120 <br />' -Amyl methyl ether N.D. .5 u9/1 96 71-114 <br /> t-Butyl alcohol N.D- 5. ug/l 101 59-139 <br /> Benzene N.D. .5 u9/1 104 85-117 <br /> 1,2-Dichloroethane N.D- .5 ug/l 101 77-132 <br /> Toluene N.D. .5 ug/l 105 85-115 <br /> 1,2-Dibromoethane N.D- .5 ug/l 100 81-114 <br /> Ethylbenzene N.D. .5 ug/l 107 82-119 <br /> Xylene (Total) N.D. .5 ug/1 106 84-120 <br /> Batch number: N023062AA Sample number(s) : 3930156-3930161 <br /> Ethanol N-D. 50. ug/l 93 43-159 <br /> Methyl t-butyl ether N.D. .5 ug/l 96 77-127 <br /> di-Isopropyl ether N-D. .5 ug/l 90 74-125 <br /> Ethyl t-butyl ether N.D- .5 ug/l 86 74-120 <br /> t-Amyl methyl ether N.D- .5 ug/l 90 71-114 <br /> t-Butyl alcohol N.D. 5. ug/I 95 59-139 <br /> Benzene N.D. .5 ug/l 106 85-117 <br /> 1,2-Dichloroethane N.D. .5 u9/1 104 77-132 <br />' Toluene N.D. .5 u9/1 107 85-115 <br /> 1,2-Dibromoethane N.D- .5 ug/l 100 81-114 <br /> Ethylbenzene N.D- .5 ug/l 106 82-119 <br /> Xylene (Total) N.D. .5 ug/l 106 84-120 <br />' Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup <br /> RPD <br /> Anal ais Name %REC PRBC Limits RPD MAX Conc Conc RPD Max <br /> Batch number: 02304A16A Sample number(s) : 3930154-3930156,3930159-3930161 <br /> TPH-GRO - Waters 110 74-132 <br /> *- Outside of specification <br /> 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 /> Lancaster Laboratories,Inc. <br />' M E M B E R 2425 New Holland Pike <br /> ® PO Box 13425 <br /> Lancaster, 1 425 <br /> 717-656-230000 Fax:Fax:717-656-2581 2216 Rev.9111/00 <br />