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Lancaster Laboratories <br /> Where quality is a science <br /> Page 1 of 3 <br /> Quality Control Sinnmary <br /> Client Name ChevronTexaco Group Number 825985 <br /> Reported 10/22/02 at 05 49 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD— LCS/LCSD <br /> Analvsxe Name Result MDL Units IREC %REC Limits RPD RPD Max <br /> Batch number 02282A56A Sample number(s) 3914611-3914618 <br /> TPH-GRO - Waters N D 50 ug/1 94 94 74-116 0 30 <br /> Batch number 022870003A Sample number(s) 3914612-3914108 618 64-130 <br /> Methanol (by Direct Injection) N D 200 ug/1 <br /> Batch number N022851AA Sample number(s) 3914612-3914616 43-159 <br /> Ethanol N D 50 ug/ 977-127 <br /> Methyl t-butyl ether N D 5 ug/1l 966 <br /> N D 5 ug/l 106 74-125 <br /> di-Isopropyl ether N p 5 ug/l 94 74-120 <br /> Ethyl t-butyl ether N D S u9/1 91 71-114 <br /> t-Amyl methyl ether N D 5 ug/1 72 59-139 <br /> t-Butyl alcohol 85-117 <br /> Benzene N D 5 ug/l 104 105 77-132 <br /> 1,2-Dichloroethane N D 5 ug/l 106 85-115 <br /> Toluene N D 5 ug/ <br /> N D 5 ug/1l 97 81-114 <br /> 1,2-Dibromoethane N D 5 ug/l 108 82-119 <br /> Ethylbenzene N D 5 ug/i 109 84-120 <br /> Xylene (Total) <br /> Batch number N022851AB N D ple number(s) 3914611,3914�6077-127 <br /> 17-3914618 43-159 . <br /> Ethanol u <br /> g <br /> N p 5 ug/1 96 <br /> Methyl t-butyl ether N D 5 ug/1 106 74-125 <br /> di-Isopropyl ether 94 _ 74-120 <br /> N D 5 ug/ <br /> Ethyl t-butyl ether N D 5 ug/l 94 71-114 <br /> t-Amyl methyl ether N D 5 ug/1 <br /> l 72 59-139 <br /> t-Butyl alcohol N D 5 ug/l 105 85-117 <br /> Benzene N D 5 ug/1 104 77-132 <br /> 1,2-Dichloroethane— �N-D 5 ug/1 146 85-115 <br /> Toluene 81-114 <br /> 1,2-Dibromoethane N D 5 ug/l 97 g2-119 <br /> Ethylbenzene N D 5 ug/1 108 T <br /> --N`p 5— 1 --109 84-120 <br /> Xylene (Total) <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BAG DUP DUP Drup <br /> RPD <br /> Analysis Name %REC %REC Limits RPD MAX Co nc Cone RPD Max <br /> Batch number 02282A56A Sample number(s) 3914611-3914618 <br /> TPH-GRO - Waters 74-132 <br /> Batch number 022870003A Sample number(s) 3914612-3914618 <br /> Methanol (by Direct Injection) 104 104 69-127 0 20 <br /> Batch number N022851AA Sample number(s) 3914612-3914616 <br /> Ethanol 74 75 34-163 2 30 <br /> Methyl t-butyl ether 94 98 69-134 3 30 <br /> di-Isopropyl ether 105 106 68-133 1 30 <br /> Ethyl t-butyl ether 92 95 73-123 3 30 <br /> t-Amyl methyl ether 90 92 69-11 30 <br /> t-Butyl alcohol 57 69 51-1448 8 3 30 <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five Mmes the LOQ <br /> (2) The background result was more than four Mmes the spike added / <br /> Lancaster laboratories Inc <br /> M E M B E R 2425 New Holland Pike <br /> PO Box 12425 <br /> 4 Lancaster PA 17605-2425 2216 Rev 9/11/00 <br /> 717 656-2300 Fax 717 656 2691 <br />