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Lancaster <br />Laboratories <br />Page i of 2 <br />Quality Control Suilmtary <br />Client Name: ChevronTexaco <br />Group Number: 855926 <br />Reported: 06/23/03 at 11:50 AM <br />Laboratory Compliance Quality Control <br />Blank Blank Report LCS LCSD LCS/LCSD <br />Anal eis Name Result MDL <br />Units $REC %REC Limits RPD RPD Max <br />Batch number: 0316SA07B Sample number(s) 4065001-4065005 104 70-130 4 30 <br />TPH-GRO - Waters <br />N.D. 50. u9/1 100 <br />Batch number: 031700001A Sample number(s) 4065001-4065005 78-114 <br />Methanol (by Direct Injection) N.D. 200. u9/1 100 <br />Batch number: P031672AB Sample number(s): 4065001-4065005 4-1-159 <br />N.D. 50. ug/1 52 <br />Ethanol 77-127 <br />Methyl Tertiary Butyl Ether N.D. 0.5 u9/1 97 74-125 <br />di -Isopropyl ether N.D. 0.5 ug/l 101 74-120 <br />Ethyl t -butyl ether N.D. 0.5 ug/1 101ug�l 65 79-113 <br />N.D. 0.5 <br />t -Amyl methyl ether 1 98 53-147 <br />t -Butyl alcohol N.D. 5- 85-117 <br />Benzene N.D. 0.5 ug/l 106 77-132 <br />1,2-Dichloroethane N.D. 0.5 ug/1 103 85-115 <br />Toluene N.D. 0.5 ug/1 98 81-114 <br />1,2-Dibromoethane N - D• 0"5 ug/l 98 62-119 <br />Ethylbenzene N.D. 0.5 ug/1 84-120 <br />Xylene (Total) N.D. 0.5 ug/l 98 <br />Sample Matrix Quality Control <br />MS MSA MS/MSD RPD BKG DUP DUB Dup <br />RPD <br />Conc RPD Max <br />Analysis Name IREC $REC Limits <br />RPD MAX Conc <br />Batch number: 0316BA07B Sample number(s): 4065001-4065005 <br />TPH-GRO - Waters 105 70-130 <br />Batch number: 031700001A Sample number(s): 4065001-4065005 <br />Methanol (by Direct Injection) 100 96 78-116 4 20 <br />Batch number: P031672AB sample number(s): 4065001-4065005 <br />Ethanal 52 87 34-163 51+ 30 <br />Methyl Tertiary Butyl Ether 99 98 59-134 2 30 <br />di -Isopropyl ether 105 102 75-130 2 30 <br />Ethyl t -butyl ether 104 102 73-123 1 30 <br />t -Amyl methyl ether 102 100 77-117 3 30 <br />t -Butyl alcohol 65 83 39-155 24 30 <br />Benzene 115 113 83-128 1 30 <br />1,2-Dichloroethane 304 103 73-136 0 30 <br />Toluene 108 106 83-127 2 30 <br />1,2-Dibromoethane 95 92 78-120 3 30 <br />Ethylbenzene 107 104 82-134 3 30 <br />Xylene (Total) 106 105 82-130 1 30 <br />Surrogate Quality Control <br />Analysis Name: TPH-GRO - Waters <br />Batch number: 0316RA07B <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 Ft 2425 New Holland Pike <br />Box 12425 <br />La <br />� Lancaster, PA 17605-2425 2256 Rev. 3110103 <br />717-656-2300 Fax: 717-656-2681 <br />