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Lancaster <br /> Report <br /> � <br /> Laboratories Analysis Re Y la <br /> 2425 New Holland Pike PO Bax 92425 Lancaster PA 17605-2425*717 656 2300 Fax 717 656 2681•www lancasterlabs Com <br /> Page 2 of 3 <br /> Quality Control Summary <br />' Client Name C1levronTexaco Group Number 859631 <br /> Reported 07/27/03 at 11 20 AM <br />' Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup <br /> Annlvsig Name <br /> RPD <br /> %REC %REC Limits RPD MAX Conc Cone RPD Matx <br /> 1,2-trichloroethane 110 109 73-136 1 30 <br />' Toluene 113 111 83-127 2 30 <br /> 1,2-Dibromoethane 98 96 78-120 2 30 <br /> Ethylbenzene 113 112 82-134 1 30 <br /> Xylene (Total) 114 3.12 82-130 2 30 <br />' Batch number P032031AA Sample number(s) 4082976-4082979 <br /> Ethanol 109 110 34-163 2 30 <br /> Methyl Tertiary Butyl Ether 94 95 69-134 1 30 <br /> di-Isopropyl ether 102 104 75-130 2 30 <br /> Ethyl t-butyl ether 99 101 73-123 2 30 <br />' t-Amyl methyl ether 96 96 77-117 0 30 <br /> t-Butyl alcohol 103 104 39-155 0 30 <br /> Benzene 104 104 83-128 0 30 <br /> 1,2-Dichloroethane 103 104 73-136 1 30 <br /> Toluene 103 104 83-127 1 30 <br /> 1,2-Dibromoethane 97 98 78-120 1 30 <br />' Ethylbenzene 102 101 82-134 1 30 <br /> Xylene (Total) 104 104 82-130 0 30 <br /> lieSurrogate Quality Control <br /> Analysis Name Methanol and Ethanol <br /> Batch number 031980003A <br />' Acetone <br /> 4082976 94 <br /> 4082977 96 <br /> 4082978 95 <br />' 4082979 93 <br /> 4082980 95 <br /> Blank 93 <br /> LCS 93 <br /> MS 92 <br /> MSD 94 <br />' Limits 72-128 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 03198AIGA <br /> 1 Trifluorotoluene-F <br /> 4082976 108 <br /> 4082977 109 <br /> 4082978 105 <br /> 1 4082979 107 <br /> 4082980 103 <br /> Blank 108 <br /> LCS 113 <br /> LCSD 113 <br /> MS 116 <br /> *-Outside of specification <br /> 1 (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 />