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Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike PO Box 12425 Lancaster,PA 17605-2425-717656 2304 Fax 717 656-2681•www lancasterlabs com <br /> Page 2 of 4 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 863455 <br /> Reported 08/27/03 at 04 55 PM <br /> Sample Matrix Quality Control. <br /> MS MSD M5/14SD RPD BKG DUP DUP Dup <br /> RPD <br /> Anal sis Name %REC %REC Limits RPD MAX Conc cone RPD Marta <br /> TPH-GRO Waters 123 70-130 <br /> Batch number 032330005A Sample number(s) 4103055-4103064 <br /> Methanol (by Direct 1n7ection) 92 92 78-116 0 20 <br /> Batch number N032331AA Sample number(s) 4103054 <br /> Methyl Tertiary Butyl Ether 101 105 69-134 4 30 <br /> Benzene 106 109 83-128 3 30 <br /> Toluene 104 105 83-127 1 30 <br /> Ethylbenzene 107 108 82-134 0 30 <br /> Xylene (Total) 109 110 82-130 1 30 <br /> Batch number P032321AA Sample number(s) 4103055-4103057 <br /> Ethanol 90 93 34-163 4 30 <br /> Methyl Tertiary Butyl Ether 96 98 69-134 2 30 <br /> di-Isopropyl ether 103 102 75-130 1 30 <br /> Ethyl t-butyl ether 101 102 73-123 1 30 <br /> t-Amyl methyl ether 102 105 77-117 3 30 <br /> t-Butyl alcohol 101 100 39-155 1 30 <br /> Benzene 109 108 83-128 0 30 <br /> 1,2-Dichloroethane 98 95 73-136 3 30 <br /> Toluene 109 111 83-127 2 30 <br /> 1 2-Dibromoethane 100 102 78-120 2 30 <br /> Ethylbenzene 109 112 82-134 3 30 <br /> Xylene (Total) 110 112 82-130 2 30 <br /> Batch number P032331AB Sample number(s) 4103058-4103064 <br /> Ethanol 99 96 34-163 3 30 <br /> Methyl Tertiary Butyl Ether 99 100 69-134 1 30 <br /> di-isopropyl ether 104 103 75-130 2 30 <br /> Ethyl t-butyl ether 101 102 73-123 0 30 <br /> t-Amyl methyl ether 102 105 77-117 2 30 <br /> t-Butyl alcohol 103 103 39-155 0 30 <br /> Benzene 108 109 83-128 1 30 <br /> 1,2-Dichloroethane 93 94 73-136 1 30 <br /> Toluene 112 110 83-127 2 34 <br /> 1,2-Dibromoethane 102 99 78-120 3 30 <br /> Ethylbenzene 110 110 82-134 0 30 <br /> Xylene (Total) 113 110 82-130 3 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 03226A16C <br /> Trifluorotoluene-F <br /> 4103054 98 <br /> Blank 108 <br /> LCS 115 <br /> LCSD 115 <br /> MS 103 <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 />