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• P. <br /> i <br /> Lancaster Laboratories Page I of 2 <br /> Where quality is a science i <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 808116 <br /> Reported 05/29/02 at 02 28 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result I+IDL IIaita RSC RI! Limits RPD RPD Max <br /> Batch number 0214OA53A Sample number(s) 3822483 <br /> Benzene N D 0 5 ug/l 110 114 80-118 3 30 <br /> Toluene N D 0 5 ug/l 110 115 82-119 4 30 <br /> Ethylbenzene N D 0 5 ug/l 112 117 81-119 4 30 <br /> Total Xylenes N D 1 5 ug/l 110 115 82-120 4 30 <br /> Methyl tert-Butyl Ether N D 2 5 ug/1 116 117 79-127 1 30 <br /> TPH-GRO - Waters N D 50 ug/1 105 112 76-126 6 30 <br /> Batch number 0214OB56A Sample number(s) 3822484 <br /> Benzene N D 0 5 ug/l 112 113 80-118 1 30 <br /> Toluene N D 0 5 u9/1 114 114 82-119 0 30 <br /> Ethylbenzene N D 0 5 ug/1 115 115 81-119 0 30 <br /> Total Xylenes N D 1 5 ug/1 115 115 82-120 0 30 <br /> Methyl tent-Butyl Ether N D 2.5 ug/l 105 106 79-127 1 30 <br /> TPH-GRO - Waters N D 50 ug/l 115 99 76-126 14 30 <br /> Batch number V021361AC Sample number(s) 3822484 <br /> Ethanol N D Soo ug/l 95 44-139 <br /> Methyl t-butyl ether N D 2 ug/l 100 77-127 <br /> di-Isopropyl ether N D 2 ug/1 96 74-125 <br /> Ethyl t-butyl ether N D 2 ug/l 100 74-120 <br /> t-Amyl methyl ether N D 2 ug/l 102 71-114 <br /> t-Butyl alcohol N D 100 ug/l 108 59-139 <br /> Sample Matrix Quality Control <br /> Ms MSD MS/MSD RPD BKO DIIP DUP Dup <br /> Analysis Name ARSC PRBC LRPD <br /> Limits RPD MAX Conc Conc RPD M_a_ <br /> Batch number 0214DA53A Sample number(s) 3822483 <br /> Benzene 117 77-131 <br /> Toluene 117 80-128 <br /> Ethylbenzene 119 76-132 <br /> Total Xylenes 117 76-132 <br /> Methyl tent-Butyl Ether 120 61-144 <br /> TPH-GRO - Waters 114 74-132 <br /> Batch number 0214OB56A Sample number(s) 3822484 <br /> Benzene 114 77-131 <br /> Toluene 117 80-128 <br /> Ethylbenzene 118 76-132 <br /> Total Xylenes 118 76-132 <br /> Methyl tert-Butyl Ether 105 61-144 <br /> TPH-GRO - Waters 114 74-132 <br /> Batch number V021361AC Sample number(s) 3822484 <br /> Ethanol 64* 81 70-130 24 30 <br /> Methyl t-butyl ether 95 97 69-134 2 30 <br /> di-Isopropyl ether 99 96 68-133 2 30 <br /> Ethyl t-butyl ether 97 96 73-123 1 30 <br /> t-Amyl methyl ether 105 102 69-118 2 30 <br /> t-Butyl alcohol 107 110 51-148 3 30 <br /> *-Outside of specification <br /> (1) The result for one or both deterrrmnations was less than five tithes the LOQ <br /> (2) The background result was more than four times the spike added <br /> Lancaster Laboratories Inc <br /> M E M 8 E R 2425 New Holland Pike <br /> PO Box 12425 <br /> 0 Lancaster PA 17605-2425 <br /> 717 656 2300 Fax 717 656 2681 2216 Rev 9111/00 <br />