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Lancaster Laboratories Page I of 4 <br /> Where quality is a science <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number: 817246 <br /> Reported 08/14/02 at 01 04 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Re-on Mb uni&a R8 $m Limit RPD RPDA <br /> Batch number 02213A55A Sample number(s) 3869009-3869016,3869018 <br /> TPH-GRO - Waters N D 50 ug/1 106 104 74-116 2 30 <br /> Batch number 02213ASSB Sample number(s) 3869017 <br /> TPH-GRO - Waters N D 50 ug/l 106 104 74-116 2 30 <br /> Batch number 022140000A Sample number(s) 3869010-3869017 <br /> TPH - DRO CA LUFT (Waters) N D 50 ug/l 86 83 54-120 4 20 <br /> Batch number 022140020A Sample number s) 3669014-3869017 <br /> Methanol (by Direct Infection) N D 1000 ug/l 96 64-130 <br /> Batch number 02217112601A Sample number(s) 3869018 <br /> TRPH 418 1 N D 32 mg/l 75 85 57-110 12• 11 <br /> Batch number X022141AB Sample number(s) 3869009-3869010 <br /> Methyl t-butyl ether N D 2 u9/1 96 98 77-127 3 30 <br /> Benzene N D 5 ug/1 101 102 85-117 0 30 <br /> Toluene N D 5 ug/I 102 101 85-115 1 30 <br /> Sthylbenzene N D 5 ug/l 102 99 82-119 2 30 <br /> Xylene (Total) N D 5 ug/1 102 101 84-120 1 30 <br /> Batch number N022142AA Sample number(s) 3869012-3869013 <br /> Methyl t-butyl ether N D 2 ug/l 94 77-127 <br /> Benzene N D 5 ug/1 103 85-117 <br /> Toluene N D 7 ug/l 102 85-115 <br /> Ethylbenzene N D 8 ug/l 100 82-119 <br /> Xylene (Total) N D 8 ug/l 102 84-120 <br /> i <br /> Batch number N022142AB Sample number(s) 3869012,3869014-3869018 <br /> Ethanol N D 500 ug/l 117 43-159 <br /> Methyl t-butyl ether N D 2 ug/1 94 77-127 <br /> di-Isopropyl ether N D 2 ug/l 95 74-125 <br /> Ethyl t-butyl ether N D 2 ug/1 86 74-120 <br /> t-Amyl methyl ether N D 2 ug/l 90 71-114 <br /> t-Butyl alcohol N D 100 ug/l 100 59-139 <br /> Benzene N D 5 ug/1 103 85-117 <br /> 1,2-Dichloroethane N D 2 ug/1 102 77-132 <br /> Toluene N D 5 ug/l 102 85-115 <br /> 1,2-Dibromoethane N D 2 ug/l 97 81-114 <br /> Ethylbenzene N D 5 ug/1 100 82-119 <br /> Xylene (Total) N D 5 ug/l 102 84-120 <br /> Batch number N022142AC Sample number(S) 3869011 <br /> Methyl t-butyl ether N D 2 ug/l 94 77-127 <br /> Benzene N D 5 ug/l 103 85-117 <br /> Toluene N D 5 ug/1 102 85-115 <br /> Ethylbenzene N D 5 ug/1 100 82-119 <br /> Xylene (Total) N D 5 ug/l 102 84-120 <br /> Sample Matrix Quality Control <br /> M3 MSD MS/MSD RPD BKO D13P DUP Dup <br /> RPD <br /> Analysis Name $RSC $RHC Limits RPD MAX Cong Colic RPD Max <br /> Batch number 02213A55A Sample number(s) 3869009-3869016,3869018 <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 /> Lancaster Laboratories Inc <br /> M E M B E R 2425 New Holland Pike <br /> PO Box 12425 <br /> Lancaster 17605-2425 <br /> 717 656-230000 Fax 717-656-2681 2216 Rev 9111/04 <br />