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Lancaster <br /> i Laboratories Page 4 of 7 <br /> Quality Control Summary <br /> Client Name: Secor International Group Number: 842784 <br /> Reported: 03/05/03 at 07 :48 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup <br /> RPD <br /> Analysis Name %REC %REC Limits RPD MAX Coria Conc RPD Max <br /> t-Butyl alcohol 84 92 14-185 8 30 <br /> Benzene 84 92 52-141 8 30 <br /> Toluene 85 95 53-137 10 30 <br /> Ethylbenzene 83 92 50-136 10 30 <br /> Xylene (Total) 84 93 47-139 9 30 <br /> Batch number: K030572AB Sample number(s) : 4001937-4001938,4001940 <br /> Methyl Tertiary Butyl Ether 88 86 57-136 2 30 <br /> di-Isopropyl ether 99 96 55-132 2 30 <br /> Ethyl t-butyl ether 101 98 58-127 2 30 <br /> t-Amyl methyl ether 95 94 58-126 0 30 <br /> t-Butyl alcohol 54 54 14-185 1 30 <br /> Benzene 107 98 52-141 8 30 <br /> Toluene 98 94 53-137 4 30 <br /> Ethylbenzene 106 99 50-136 7 30 <br /> Xylene (Total) 108 100 47-139 6 30 <br /> *ch number: K030572AC Sample number(s) : 4001931,4001937,4001939,4001941 <br /> ethyl Tertiary Butyl Ether 88 86 57-136 2 30 <br /> di-Isopropyl ether 99 96 55-132 2 30 <br /> Ethyl t-butyl ether 101 98 58-127 2 30 <br /> t-Amyl methyl ether 95 94 58-126 0 30 <br /> t-Butyl alcohol 54 54 14-185 1 30 <br /> Chloromethane 104 89 28-151 16 30 <br /> Vinyl Chloride 117 97 33-147 19 30 <br /> Bromomethane 102 87 25-148 16 30 <br /> Chloroethane 107 91 33-147 16 30 <br /> Trichlorofluoromethane 119 104 26-157 13 30 <br /> 1,1-Dichloroethene 109 101 48-147 7 30 <br /> Methylene Chloride 97 92 59-135 5 30 <br /> trans-1,2-Dichloroethene 105 98 52-136 6 30 <br /> 1,1-Dichloroethane 105 102 60-133 3 30 <br /> cis-1,2-Dichloroethene 104 99 59-130 4 30 <br /> Chloroform 104 99 57-135 4 30 <br /> 1,1,1-Trichloroethane 1.08 103 53-137 4 30 <br /> Carbon Tetrachloride 109 101 46-138 7 30 <br /> Benzene 107 98 52-141 8 30 <br /> 1,2-Dichloroethane 96 91 57-137 5 30 <br /> Trichloroethene 109 100 47-140 7 30 <br /> 1,2-Dichloropropane 104 100 60-129 4 30 <br /> Bromodichloromethane 99 94 55-131 4 30 <br /> Toluene 98 94 53-137 4 30 <br /> 1,1,2-Trichloroethane 85 88 45-150 4 30 <br /> Tetrachloroethene 138 126 46-152 9 30 <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ. <br /> 40 The background result was more than four times the spike added. <br /> Lancaster Laboratories,Inc. <br /> MEMBER 2425 New Holland Pike <br /> ® PO Box 1 <br /> � Lancasterr,,PA PA 17605-2425 <br /> 717-656-2300 Fax:717-656-2681 2216 Rev.1012!92 <br />