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Page 1 of 2 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 807822 <br /> Reported 05/24/02 at 04 42 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Units 96REC %REC Limits RPD RPD Max <br /> Batch number 02137A51A Sample number(s) 3821173 <br /> TPH-GAO - Waters N D 50 ug/l 93 76--126 <br /> Batch number 021410027A Sample number(s) 3821173 <br /> Methanol (by Direct Injection) N D 200 ug/l 104 64-130 <br /> Batch number V021341AB Sample number(s) 3821173-3821174 <br /> Ethanol N D 50 ug/l 90 44-139 <br /> Methyl t-butyl ether N D 5 ug/l 105 77-127 <br /> di-Isopropyl ether N D 5 ug/1 104 74-125 <br /> Ethyl t-butyl ether N D 5 ug/l 104 74--120 <br /> t-Amyl methyl ether N D 5 ug/l 102 71-114 <br /> t-Butyl alcohol N D 5 ug/l 99 59-139 <br /> Benzene N D 5 ug/l 104 84-120 <br /> 1,2-Dichloroethane N D 5 ug/1 119 77-132 <br /> Toluene N D 5 ug/1 92 86-123 <br /> 1,2-Dibromoethane N D 5 ug/l 93 84-119 <br /> Ethylbenzene N D 5 ug/l 95 88-124 <br /> Xylene (Total) N D 5 ug/l 93 89-124 <br /> Sample Matrix Quality Control <br /> HS MSD NS/NSD RPD BKO DUP DUP DUP <br /> RFD <br /> *AnalySiS Name %REC %REC Limits RPD NAX Conc Conc RPD max <br /> Batch number 02137A51A Sample number(s) 3821173 <br /> TPH-GRO - Waters 111 ill 74-132 1 30 <br /> Batch number 021410027A Sample number(s) 3821173 <br /> Methanol (by Direct Injection) 100 104 58-137 4 20 <br /> Batch number V021341AB Sample number(s) 3821173-3821174 <br /> Ethanol 109 113 70-130 3 30 <br /> Methyl t-butyl ether 112 117 69-134 2 30 <br /> di-Isopropyl ether 108 108 68-133 0 30 <br /> Ethyl t-butyl ether 109 108 '73-123 1 30 <br /> t-Amyl methyl ether 107 109 69-118 2 30 <br /> t-Butyl alcohol 106 120 51-148 7 30 <br /> Benzene 110 109 78-134 1 30 <br /> 1,2-Dichloroethane 121 119 75-141 2 30 <br /> Toluene 99 98 78-133 0 30 <br /> 1,2--Dibromoethane 94 95 78-120 1 30 <br /> Ethylbenzene 99 102 82-134 3 30 <br /> Xylene (Total) 99 100 81-136 2 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 02137A51A <br /> Trifluorotoluene-F <br /> 3821173 102 <br /> Blank 102 <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 />