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1 <br />Lancaster <br />• Laboratories <br />Quality Control Summary <br />' Client Name ChevronTexaco Group Number 839081 <br />Reported 01/31/03 at 03 56 PM <br />Laboratory Compliance Quality Control <br />'Blank Blank Report LCS LCSD LCS/LCSD <br />Analysis Name Result MDL Unita %RBC 'LREC Limits <br />Batch number 03025A07C Sample number(s) 3983543 <br />' TPH-GRO - Waters N D 50 ug/l 96 95 74-116 <br />Batch number 030280003A Sample number(s) 3983539-3983542 <br />Methanol (by Direct Injection) N D 200 ug/l 92 64-130 <br />'Batch number 0302GA07A Sample number s) 3983539 <br />TPH-GRO - Waters N D 50 ug/i 103 104 74-116 <br />Batch number 0302BA07B Sample number(s) 3983540-3983542 <br />TPH-GRO - Waters N D 50 ug/1 103 104 74-116 <br />' Batch number N030272AA Sample number(s) 3983539-3983543 <br />Ethanol N D 50 ug/l 75 43-159 <br />Methyl Tertiary Butyl Ether N D 5 ug/l 100 77-127 <br />di -Isopropyl ether N D 5 ug/l 111 74-125 <br />'Ethyl t -butyl ether N D 5 ug/l 99 74-120 <br />t -Amyl methyl ether N D 5 ug/l 95 71-114 <br />t -Butyl alcohol N D 5 ug/l 68 59-139 <br />Benzene N D 5 ug/l 110 85-117 <br />2-Dichloroethane N D 5 ug/1 105 77-132 <br />luene N D 5 ug/1 108 85-115 <br />'2-Dibromoethane N D 5 ug/1 89 81-114 <br />thylbenzene N D 5 ug/l 107 82-119 <br />Xylene (Total) N D 5 ug/l 107 84-120 <br />11 <br />' ]analysis Name <br />Batch number 03025A07C <br />TPH-GRO - Waters <br />Batch number 030280003A <br />Methanol (by Direct Injection) <br />Batch number 0302BA07A <br />TPH-GRO - Waters <br />'Batch number 0302BA07B <br />TPH-GRO - Waters <br />Batch number N030272AA <br />'Ethanol <br />Methyl Tertiary Butyl Ether <br />di -Isopropyl ether <br />Ethyl t -butyl ether <br />t -Amyl methyl ether <br />'t -Butyl alcohol <br />Benzene <br />1,2 -Di chloroethane <br />Sample Matrix Quality Control <br />MS MSD MS/MSD RPD BEG <br />5WEC %RSC Limits RPD MAX ConC <br />Sample number(s) 3983543 <br />114 74-132 <br />Sample number(s) 3983539-3983542 <br />92 92 69-127 0 20 <br />Sample number(s) 3983539 <br />110 74-132 <br />Sample <br />number(s) 3983540-3983542 <br />110 <br />2425 New Holland Pike <br />74-132 <br />92425 <br />Lancaster, PA 17605-2425 <br />Sample <br />numbers) 3983539-3983543 <br />64 <br />71 <br />34-163 <br />9 <br />30 <br />96 <br />97 <br />69-134 <br />0 <br />30 <br />113 <br />114 <br />68-133 <br />1 <br />30 <br />93 <br />94 <br />73-123 <br />2 <br />30 <br />90 <br />91 <br />69-118 <br />1 <br />30 <br />58 <br />60 <br />51-148 <br />4 <br />30 <br />115 <br />115 <br />78-134 <br />0 <br />30 <br />104 <br />104 <br />73-136 <br />0 <br />30 <br />Outside of specification <br />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 />Page 1 of 3 <br />RPD RPD Max <br />1 30 <br />1 30 <br />1 30 <br />DUP DUP Dup <br />RPD <br />Coni RPD Max <br />2216 Rev 1012/02 <br />Lancaster Laboratories, Inc. <br />2425 New Holland Pike <br />' M E M B E R <br />®Box <br />92425 <br />Lancaster, PA 17605-2425 <br />717-656-2300 Fax 717-656-2681 <br />Page 1 of 3 <br />RPD RPD Max <br />1 30 <br />1 30 <br />1 30 <br />DUP DUP Dup <br />RPD <br />Coni RPD Max <br />2216 Rev 1012/02 <br />