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Lancaster Laboratories Page 2 of <br /> d Where qualit,y�'s a science. <br /> Quala�ty Control Summary <br /> Client Name: Chevron c/o Gettler Ryan Group Number: 786603 <br /> Reported: 11/27/01 at 07:52 AM <br /> Sample Matrix Quality Control <br /> MS MSD M3/MSD RPD BKG DUP DUP Dup <br /> RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number: 0132GA53 Sample number(s) : 3728222 <br /> Benzene 99 66-140 <br /> Toluene 98 72-138 <br /> Ethylbenzene 99 71-138 <br /> Total Xylenes 95 69-140 <br /> Methyl tert-Butyl Ether 98 60-145 <br /> TPH-GRO N. California (waters) 109 74-132 <br /> Batch number: U013181AC Sample number(s) : 3728223-3728229 <br /> Ethanol 74 103 70-130 33* 30 <br /> Methyl t-butyl ether 96 92 69-134 2 30 <br /> di-Isopropyl ether 90 93 75-128 3 30 <br /> Ethyl t-butyl ether 99 100 73-123 1 30 <br /> t-Amyl methyl ether 95 97 69-126 2 30 <br /> t-Butyl alcohol 103 101 50-157 2 30 <br /> 1,2-Dichloroethane 101 103 75-141 2 30 <br /> 1,2-Dibromoethane 92 93 76-120 2 30 <br /> Batch number: U013201AA Sample number(s) : 3728230,3728232--3728233,3728235-3728236 <br /> hanol 97 81 70-130 18 30 <br /> thyl t-butyl ether 93 93 69-134 1 30 <br /> i-Isopropyl ether 93 96 75-128 4 30 <br /> Ethyl t-butyl ether 95 93 73-123 2 30 <br /> t-Amyl methyl ether 91 91 69-126 0 30 <br /> t-Butyl alcohol 94 97 50-157 3 30 <br /> 1,2-Dichloroethane 96 99 75-141 4 30 <br /> 1,2-Dibromoethane 90 96 78-120 7 30 <br /> Batch number: U013201AB Sample number(s) : 3728231,3726234 <br /> Ethanol 97 81 70-130 18 30 <br /> Methyl t-butyl ether 93 93 69-134 1 30 <br /> di-Isopropyl ether 93 96 75--126 4 30 <br /> Ethyl t-butyl ether 95 93 73-123 2 30 <br /> t-Amyl methyl ether 91 91 69-126 0 30 <br /> t-Butyl alcohol 94 97 50-157 3 30 <br /> 1,2-Dichloroethane 96 99 75-141 4 30 <br /> 1,2-Dibromoethane 90 96 78-120 7 30 <br /> Surrogate Quality Control <br /> Analysis Name: Methanol and Ethanol <br /> Batch number: 013200016A <br /> Acetone <br /> 3728223 100 <br /> 3728224 102 <br /> 3728225 101 <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 /> Lancaster Laboratories,Inc. <br /> M B IIA B E R 2425 New Holland Pike <br /> Po sox 12425 <br /> Lancaster,PA 17605-2425 <br /> 717-656-2300 Fax:717-656-2681 2216 Rev.9/17/00 <br />