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i <br /> 1 <br /> Page 1 of 2 <br /> Quality Control Summary <br /> Client Name: ChevronTexaco Group Number: 914461 <br /> Reported: 10/12/04 at 05:28 PM <br /> Matrix QC may not be reported if site-specific QC samples were not <br /> submitted, In these situations,to demonstrate precision and accuracy at <br /> a batch level,a LCS/LCSD was performed,unless otherwise specified in the <br /> method. ' <br /> Laboratory Compliance Quality Control ' <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Units REC REC Limits RPR RPD Max <br /> Batch number: 04279A16A Sample number(s) : 4366076 <br /> TPH-GRO - Waters N.D. 50. ug/l 88 87 70-130 2 30 <br /> Batch number: 042B4A16A Sample number(s) : 4366077 <br /> TPH-GRO - Waters N.D. 50. ug/l 100 90 70-130 10 30 <br /> I <br /> Batch number: Z042821AA Sample number(s) : 4366076-4366077 <br /> Ethanol N.D. 50. ug/i 86 46-145 <br /> Methyl Tertiary Butyl Ether N.D. 0.5 ug/1 95 77-127 a <br /> di-Isopropyl ether N.D. 0.5 ug/1 1G5 67-130 <br /> Ethyl t-butyl ether N.D. 0.5 ug/1 98 74-120 <br /> t-Amyl methyl ether N.D. 0.5 ug/1 94 79-113 <br /> t-Butyl alcohol N.D. 5. ug/l 90 57-141 <br /> Benzene N.D. 0.5 ug/1 97 85-117 <br /> 1,2-Dichloroethane N.D. 0.5 ug/l 98 77-132 <br /> Toluene N.D. 0.5 ug/l 95 85-115 . <br /> 1,2-Dibromoethane N.D. 0.5 ug/l 95 81-114 I ' <br /> Ethylbenzene N.D. 0.5 ug/l 94 82-119 <br /> Xylene (Total) N.D. 0.5 u9/1 91 63-113 <br /> I <br /> Sample Matrix Quality Control <br /> MS MSD MS/X9D RPD BKG DUP DUP Dup RPD <br /> An 1 is Name %REC %RBC Limits RPD MAX Conc Conc RPD Maaxx,Wt <br /> Batch number: 04279A16A Sample number(s) : 4366076 <br /> TPH-GRO Waters 102 98 63-154 3 30 <br /> Batch number: 04284A16A Sample number(s) : 4366077 <br /> TPH-GRO - Waters 108 63-154 j <br /> Batch number: Z042821AA Sample number(s) : 4366076-4366077 1 <br /> Ethanol 89 86 33-153 4 30 <br /> Methyl Tertiary Butyl Ether 99 97 69-134 2 30 <br /> di-Isopropyl ether 109 , 108 75-130 1 30 <br /> Ethyl t-butyl ether 99 100 78-119 0 30 <br /> t-Amyl methyl ether 96 95 77-117 1 30 <br /> t-Butyl alcohol 93 90 51-147 4 30 <br /> Benzene 105 103 83-128 2 30 <br /> 1,2-Dich'loroethane 100 99 73-136 1 30 <br /> Toluene 101 100 83-127 1 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 />