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Lancaster Laboratories Page 1 of 3 <br /> Where quality is a suence <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 815915 <br /> Reported 08/05/02 at 07 41 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> analysis Nam Res KDL units %RHC Yt>ZSC Limi o RPD RPD biax <br /> Batch number 022050005A Sample numbers) 3859799-3859801 <br /> Methanol (by Direct Injection) N D 1000 ug/l 96 64-130 <br /> Batch number 02211A02A Sample number(s) 3859798-3859801 <br /> TPH-GRO - Waters N D 50 ug/1 93 97 74-116 <br /> Batch number N022062AA Sample number(s) 3859801 <br /> Ethanol N D 500 ug/1 80 43-159 <br /> Methyl t-butyl ether N D 2 u9/1 105 77-127 <br /> di-Isopropyl ether N D 2 ug/1 112 74-125 <br /> Ethyl t-butyl ether N D 2 ug/l 97 74-120 <br /> t-Amyl methyl ether N D 2 u9/1 93 71-114 <br /> t-Butyl alcohol N D 100 ug/l 77 59-139 <br /> Benzene N D 5 ug/1 106 85-117 <br /> Toluene N D 7 u9/1 104 65-115 <br /> Ethylbenzene N D 8 ug/1 106 82-119 <br /> Xylene (Total) N D 8 ug/l 105 84-120 <br /> Batch number N022101AA Sample number(s) 3859798-3859800 <br /> Ethanol N D 500 ug/l 77 43-159 <br /> Methyl t-butyl ether N D 2 ug/l 107 77-127 <br /> di-Isopropyl ether N D 2 ug/1 116 74-125 <br /> Ethyl t-butyl ether N D 2 ug/1 101 74-120 <br /> t-Amyl methyl ether N D 2 ug/l 95 71-114 <br /> t-Butyl alcohol N D 100 ug/1 70 59-139 <br /> Benzene N D 5 ug/l 106 85-117 <br /> Toluene N D 5 ug/l 103 85-115 <br /> Ethylbenzene N D 5 ug/l 104 82-119 <br /> Xylene {Total) N D -5 ug/1 103 84-120 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUB Dnp <br /> RPD <br /> al sia Nam REC REC Limits RPD MAX Conc Cone RPID1!ta�c <br /> Batch number 022050005A Sample number(s) 3859799-3859801 <br /> Methanol (by Direct Injection) 96 96 58-137 0 20 <br /> Batch number 02211A02A Sample number(s) 3859798-3859801 <br /> TPH-GRO - Waters 96 103 74-132 7 30 <br /> Batch number N022062AA Sample number(s) 3859801 <br /> Ethanol 77 76 34-163 0 30 <br /> Methyl t-butyl ether 106 108 69-134 3 30 <br /> di-Isopropyl ether 114 117 68-133 3 30 <br /> Ethyl t-butyl ether 97 102 73-123 5 30 <br /> t-Amyl methyl ether 93 97 69-118 4 30 <br /> t-Butyl alcohol 76 82 51-148 8 30 <br /> Benzene 110 111 78-134 1 30 <br /> Toluene 108 110 83-127 2 30 <br /> Ethylbenzene 111 113 82-134 3 30 <br /> Xylene (Total) 109 111 82-130 1 30 <br /> Batch number N022101AA Sample numbers) 3859798-3859800 <br /> Ethanol 73 77 34-163 5 30 <br /> Methyl t-butyl ether 105 106 69-134 1 30 <br /> *-Outside of specification <br /> (l) The result for one or both determinations was less than five tames the LOQ <br /> '0 (2) The background result was more than four tames the spike added <br /> Lancaster Laboratories Inc <br /> M E M B E R 2425 New Holland Pike <br /> PO Box 12425 <br /> Lancaster 1 4-5 <br /> 717 656-230000 Fax Fax 717-656 n-656 2681 2216 Rev 9171/00 <br />