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Lancaster <br /> i Analysis nalys�s Reporf <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 17605-2425•717 656 2309 Pox 717 656 2681•www lancasterlabs com <br /> Page 2 of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 889098 <br /> Reported 03/30/04 at 10 21 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup <br /> RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPA Max <br /> Batch number 04083A16A Sample nuniber(s) 4239093-4239095 <br /> TPH-GRO - Waters 118 63-154 <br /> Batch number 2040861AA Sample number s) 4239093-4239095 <br /> Ethanol 103 107 41-155 4 30 <br /> Methyl Tertiary Butyl Ether 95 101 69-134 6 30 <br /> di-Isopropyl ether 91 98 75-130 7 30 <br /> Ethyl t-butyl ether 94 101 78-119 6 30 <br /> t-Amyl methyl ether 96 104 77-117 8 30 <br /> t-Butyl alcohol 103 110 51-147 7 30 <br /> Benzene 99 104 83-128 5 30 <br /> 1 2-Dlchloroethane 94 102 73-136 8 30 <br /> Toluene 95 102 83-127 7 30 <br /> 1,2-Dibromoethane 90 100 78-120 10 30 <br /> Ethylbenzene 98 104 82-129 6 30 <br /> Xylene (Total) 98 105 82-130 7 30 <br /> Batch number P040871AA Sample number(s) 4239093 <br /> Ethanol 103 92 41-155 11 30 <br /> di-Isopropyl ether B7 85 75-130 3 30 <br /> Ethyl t-butyl ether 88 86 78-119 2 30 <br /> t-Amyl methyl ether 92 90 77-117 2 30 <br /> t-Butyl alcohol 98 95 51-147 4 30 <br /> Benzene 92 90 83-128 2 30 <br /> 1,2-Dichloroethane 89 86 73-136 3 30 <br /> Toluene 94 91 83-127 4 30 <br /> 1 2-Dlbromoethane 90 88 7B-120 3 30 <br /> Ethylbenzene 95 92 82-129 3 30 <br /> Xylene (Total) 96 94 82-130 2 30 <br /> Surrogate Quality Control <br /> Analysis Name Methanol and Ethanol <br /> Batch number 040B30025A <br /> Acetone <br /> 4239093 102 <br /> 4239094 99 <br /> 4239095 103 <br /> Blank 102 <br /> LCS 102 <br /> MS 100 <br /> MSD 99 <br /> Limps 80-132 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 040B3A16A <br /> Trifluorotoluene-F <br /> 4239093 110 <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ <br /> is(2) The background result was more than four times the spike added <br />