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� I <br /> LancasterAnalysis sis Re ort <br /> Laboratories Y <br /> 2425 New Holland Pike PO Box 12425 Lancaster,PA 17605 2425•717 656 2300 Fax 717-656.2681•www lancasterlabS com <br /> Page 2 of 4 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 880629 <br /> Reported 01/13/04 at 03 49 PM <br /> _ _ _ _ _ _ Sample--Matrix- Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup <br /> RPD <br /> Analysis Name ARE $REC Limits RPD MAX Conc Conc - RPD 14ax� <br /> Methanol (by Direct Infection) 96 96 73-117 0 20 <br /> Batch number 04009A16A Sample number(s) 4195604-4195606 <br /> TPH-GRO - Waters 117 1 63-154 <br /> Batch number 04012A07A Sample number(s) 4195607 <br /> TPH-GRO - Waters 95 63-154 <br /> Batch number 04012A07B Sample number(s) 4195606-4195611 <br /> TPH-GRO - Waters 95 63-154 <br /> Batch number N040111AA Sample number(s) 4195605-4195609 <br /> Ethanol 79 81 38-149 3 30 <br /> Methyl Tertiary Butyl Ether 107 102 69-134 4 30 <br /> di-Isopropyl ether 107 103 75-130 4 30 <br /> Ethyl t-butyl ether 108 104 78-119 4 30 <br /> t-Amyl methyl ether 107 104 77-117 3 30 <br /> t-Butyl alcohol 77 77 44-150 1 30 <br /> Benzene 113 107 83-128 5 30 <br /> 1,2-Dichloroethane 107 104 73-136 3 30 <br /> Toluene 106 102 83-127 3 30 <br /> 1,2-Dibromoethane 94 92 78-120 2 30 <br /> Ethylbenzene 107 303 82-129 -- -4 30 <br /> Xylene (Total) 105 102 82-130 3 30 <br /> Batch number N040111AB Sample number(s) 4195610-4195611 <br /> Ethanol 79 81 38-149 3 30 <br /> Methyl Tertiary Butyl Ether 107 102 69-134 4 30 <br /> �di--Isopropyl ether 107 103 75-330 4-- —30 — -- <br /> Ethyl t-butyl ether 108 104 76-119 4 30 <br /> _ __t-Amyl methyl ether 107 104 77-117 3 30 <br /> t-Butyl-alcohol 77--77 44-150---1 -30— ---- ----- -- _--- <br /> Benzene 113 107 83-126 5 30 <br /> - 1,2-Dichloroethane_._-._.----- 107 __ 104 73-136 3 30 <br /> Toluene 106 102-_ - 83-127-=-3- - --30�-- --- - - - - — ---- -- --- -- <br /> 1,2-Dibromoethane 94 92 78-120 2 30 <br /> Ethylbenzene 107 103 82-129 4 30 <br /> Xylene (Total) 105 102 82-130 3 30 <br /> Batch number W040111AA Sample number(a) 4195604 <br /> Methyl Tertiary Butyl Ether 93 95 69-134 2 30 <br /> Benzene 101 104 83-128 2 30 <br /> Toluene 98 99 83-127 2 30 <br /> Ethylbenzene 98 100 82-129 2 30 <br /> Xylene (Total) 99 100 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name Methanol and Ethanol <br /> Batch number 040090013A <br /> Acetone <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 />