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Lancaster <br />• Analysis nalys�s Report <br /> 2425 New Holland Pike PO Brix 12425 Lancaster PA 17605-2425-717 655 2300 Fax 717 656-2681•www lancasterlabs com <br /> Page 4 of 8 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 905571 <br /> Reported 08/10/04 at 06 13 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCs LCSD LCS/LCSD <br /> Analysis Name Result MDL Units %REC $REC Limits RPD RPD Max <br /> 4-Methyl-2-pentanone N D 3 ug/l 92 57-133 <br /> 2-Hexanone N D 3 ug/1 97 47-150 <br /> 2-Chlorcethyl Vinyl Ether N D 2 ug/1 95 60-129 <br /> Freon 113 N D 2 ug/l 96 73-140 <br /> Batch number Z042161AA Sample number(S) 4319453,4319456-4319457 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 110 77-127 <br /> Benzene N D 5 ug/1 100 85-117 <br /> Toluene N D 5 ug/l 95 85-115 <br /> Ethylbenzene N D 5 ug/l 94 82-119 <br /> Xylene (Total) N D 5 ug/l 92 83-113 <br /> Batch number Z042171AA Sample number(S) 4319457-4319458 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 110 77-127 <br /> Benzene N D 5 ug/1 97 85-117 <br /> Toluene N D 5 ug/l 93 65-115 <br /> Ethylbenzene N D 5 ug/l 93 82-119 <br /> Xylene (Total) N D 5 ug/l 92 83-113 <br />• Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number 04212A07D Sample number(s) 4319453-4319454,4319456-4319458 <br /> TPH-GRO - Waters 104 63-154 <br /> Batch number 04215112601A Sample number(s) 4319454 <br /> TRPH 418 1 N D N D 33 (1) 34 <br /> Batch number 042161848004 Sample number(s) 4319455 <br /> Cadmium 99 100 87-117 1 20 N D N D 0 (1) 20 <br /> Chromium 100 100 86-118 0 20 N D N D 0 {1) 20 <br /> Lead 100 100 67-IIB 0 20 N D N D 0 (1) 20 <br /> Nickel 100 100 91-113 0 20 N D N D 0 (1) 20 <br /> Zinc 65} 65* 80-120 0 20 0 174 N D 200* {1) 20 <br /> Batch number N042151AB Sample number(s) 4319454 <br /> Ethanol 99 84 33-153 17 30 <br /> Methyl Tertiary Butyl Ether 96 92 69-134 4 30 <br /> di-Isepropyl ether 101 97 75-130 4 30 <br /> Ethyl t-butyl ether 104 102 78-119 2 30 <br /> t-Amyl methyl ether 99 97 77-117 3 30 <br /> t-Butyl alcohol 105 98 51-147 2 30 <br /> Dichlorodifluoromethane 115 113 58-215 1 30 <br /> Chloromethane 98 104 69-157 6 30 <br /> Vinyl Chloride 101 106 70-151 4 30 <br /> Bromomethane 91 95 59-143 4 30 <br /> Chloroethane 95 99 63-142 4 30 <br /> Trichlorofluoromethane 109 110 67-163 1 30 <br /> 1,1-Dichloroethene 118 114 78-146 3 30 <br /> Methylene Chloride 102 97 79-133 5 30 <br /> trans-1,2-Dlchloroethene 109 105 82-133 4 30 <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 />