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*Lancaster <br />Laboratories <br />Page 1 of 4 <br />Quality Control Summary <br />Client Name: ChevronTexaco Group Number: 832605 <br />Reported: 12/12/02 at 11:42 AM <br />Laboratory Compliance Quality Control <br />Blank Blank Report LCS LCSD LCS/LCSD <br />nalyaig Name R_eault MM Onite I= C Limits RPD Max <br />Batch number: 02333A53A Sample number(s): 3950561-3950566 <br />TPH-GRO - Waters N.D. 50. u9/1 111 107 74-116 3 30 <br />Batch number: 023360041A Sample number(s): 3950561-3950565 <br />Methanol (by Direct Injection) N.D. 200. ug/l 104 64-130 <br />Batch number: N023341AB Sample number(s): 3950565-3950566 <br />Ethanol N.D. 50. ug/l 118 43-159 <br />Methyl t -butyl ether N.D. .5 ug/i 104 77-127 <br />di -Isopropyl ether N.D. ,5 ug/1 110 74-125 <br />Ethyl t -butyl ether N.D. 5 u9/1 92 74-120 <br />t -Amyl methyl ether N.D. 5 ug/l 90 71-114 <br />t -Butyl alcohol N.D. 5, ug/1 103 59 -139 - <br />Benzene N.D. S ug/l 103 85-117 <br />1,2-Dichloroethane N.D. 5 ug/l 107 77-132 <br />Toluene N.D. .5 ug/l 105 85-115 <br />1,2-Dibromoethane N, 1). .5 ug/1 94 81-114 <br />Sthylbenzene N.D. .5 ug/l 106 82-119 <br />Xylene (Total) N.D. .5 ug/1 106 84-120 <br />Batch number: N023361AA Sample number(s): 3950562-3950564 <br />Ethanol N.D. 5o_ ug/1 97 43-159 <br />thyl t -butyl ether N.D. .5 ug/l 102 77-127 <br />480propyl ether N.D_ .5 ug/l 107 74-125 <br />hyl t -butyl ether N.D. .5 ug/l 97 74-120 <br />t -Amyl methyl ether N.D_ .5 ug/1 93 71-114 <br />t -Butyl alcohol N.D. 5. ug/1 87 59-139 <br />Benzene N.D_ .5 ug/l 104 85-117 <br />1,2-Dichloroethane N.D. .5 ug/l .100 77-132 <br />Toluene N.D. .5 ug/1 105 85-115 <br />1,2-Dibromoethane N.D. .5 ug/l 92 81-114 <br />Ethylbenzene N.D. .5 ug/l 105 82-119 <br />Xylene (Total) N.D. .5 ug/1 105 84-120 <br />Batch number: N023361AB Sample number(a): 3950561 <br />Ethanol N.D_ 50. ug/1 97 43-159 <br />Methyl t -butyl ether N.D. .5 ug/1 102 77-127 <br />di -Isopropyl ether N.D. .5 ug/l 107 74-125 <br />Ethyl t -butyl ether N.D. .5 ug/l 97 74-120 <br />t -Amyl methyl ether N.D, .5 ug/1 93 71-114 <br />t -Butyl alcohol N.D. 5. ug/l 87 59-139 <br />Benzene N.D. .5 ug/l 104 85-117 <br />2,2-Dichloroethane N.D. .5 ug/l 100 77-132 <br />Toluene N.D. .5 ug/l 105 85-115 <br />1,2-Dibromoethane N.D. -5 ug/l 92 81-114 <br />Sthylbenzene N.D. .5 ug/l 105 82-119 <br />Xylene (Total) N.D. 5 ug/l 105 84-120 <br />Sample Matrix Quality Control. <br />MS MSD MS/MSD RPD BEQ DVP DOP Dup <br />RPD <br />*- Outside of specification <br />(1) 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 />Lancaster Laboratories, Inc. <br />M E M B E R 2425 New Holland Pike <br />Box 1 <br />Lancaster, <br />PA PA 17605-2425 <br />717 --- 2300 Fax: 717 -6s6 -mai <br />2216 Rev. ID/2/02 <br />