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Lancasteri Report, <br /> Laboratories Analysis <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 3 <br /> Quality Control - Summary <br /> Client Name ChevronTexaco Group Number 861651 <br /> Reported 06/14/03 at 03 24 PM I - - - - - " - <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DVP Dup <br /> RPD <br /> Analysis Name $REC = REC Limits - RPD MAX- Conc _Conc RPD Max_ <br /> 1,2-Dichloroethane 117 115 73-136 1 30 <br /> Toluene 111 109 83-127 2 30 <br /> 1,2-Dibromoethane 106 106 78-120 0 30 <br /> Ethylbenzene 109 108 82-134 1 30 <br /> Xylene (Total) 108 109 82-130 0 30 <br /> 1 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 03216A16A <br /> Trifluorotaluene-F <br /> 4093608 102 - <br /> 4093609 ill <br /> 4093610 112 <br /> 4093611 112 <br /> Blank 117 - <br /> LCS 116 <br /> LCSD 117 <br /> MS 119 <br /> Limits 57-146 <br /> Analysis Name Methanol and Ethanol <br /> Batch number 0-12200023A <br /> -Acetone w - <br /> 4093609 100 <br /> 4093610 100 - <br /> 4093611 102 <br /> Blank 101 <br /> LCS 100 <br /> MS 100 ` <br /> MSD 100 <br /> Limits 72-128 <br /> Analysis Name BTEX+MTBE by 8260B <br /> Batch number P032212AB <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 4093608 98 99 96 - - 94 _ <br /> Blank 102 97 96 94 <br /> LCS 102 98 91 92 <br /> MS 99 102 96 96 <br /> MSD 96 103 96 95 <br /> Limsts 81-120 82-112 85-112 83-113 <br /> Analysis Name BTEX}5 Oxygenates+EDC+EDS+ETOH <br /> Batch number P032252AB <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <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 />