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Lancaster Laboratories <br /> Where quality is a science- <br /> • <br /> Page 4 of 4 <br /> IQuality Control Summary <br /> Client Name: ChevronTexaco Group Number: 828797 <br />' Reported: 11/12/02 at 03 :25 PM <br /> 3930160 99 Surrogate Quality Control. <br /> Blank 92 <br /> LCs 92 <br /> I MS 94 <br /> MSD 94 <br /> Limits: 72-128 <br />' Analysis Name: BTEX + Oxygenates by 8260B <br /> Batch number: N023071AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-de 4-Bromofluorobenzene <br /> 3930154 98 99 98 97 <br />' 3930155 94 97 102 102 <br /> Blank 95 97 99 97 <br /> LCS 94 97 102 103 <br /> MS 96 98 102 105 <br /> MSD 96 98 102 105 <br />' Limits: 86-118 80-120 88-110 86-115 <br /> Analysis Name: BTEX + Oxygenates by 8260E <br /> Batch number: N023082AA <br />' _Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 930156 94 96 99 103 <br /> 3930157 94 95 99 102 <br /> 3930158 94 95 99 102 <br />' 3930159 98 99 98 102 <br /> 3930160 99 99 99 100 <br /> 3930161 101 100 98 96 <br /> Blank 97 101 99 97 <br /> LCS 95 100 102 107 <br /> MS 95 101 103 107 <br /> MSD 95 99 102 106 <br /> Limits: 86-118 80-120 88-110 86-115 <br /> I <br /> 1 *-Outside of specification <br />' 01) The result for one or both determinations was less than five times the LOQ. <br /> 12) The background result was more than four times the spike added. <br /> Lancaster Laboratories,Inc. <br />' A!1 E 110 13 E Fi 2425 New Holland Pike <br /> PO Box 12425 <br /> Lancaster,PA 17605-2425 <br /> 717-656-2300 Fax:717.656.2681 2216 Rev.9/11/00 <br />