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I <br /> A If Lancaster <br /> ,a <br /> Laboratories n a I ys is Report <br /> 2425 New Holland Pike,PO Box 12425 Lancaster,PR 17605-2425•717-656 2300 Fax 717-656-2681•www lancasterlabs com �J <br /> Page 4 of 5 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 874972 <br /> Reported 11/26/03 at 03 44 PM <br /> Surrogate Quality Control <br /> 4165113 118 <br /> 4165114 117 <br /> 4165115 116 <br /> 4165116 116 <br /> 4165117 114 <br /> 4165118 114 <br /> 4165119 120 <br /> 4165120 113 <br /> 4165121 115 <br /> Blank 105 <br /> LCS 107 <br /> MS 107 <br /> MSD 109 <br /> Limits 72-128 <br /> Analysis Name BTEX+5 Oxygenates+EDC+EDB+ETOH <br /> Batch number P033213AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 4165112 95 91 98 90 <br /> Blank 96 93 97 92 <br /> LCS 96 93 98 93 <br /> MS 95 92 98 93 <br /> MSD 96 93 98 92 <br /> Limits 81-120 82-112 85-112 83-113 <br /> Analysis Name BTEX+5 Ox}genates+EDC+EDB+ETOH <br /> Batch number P033221AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 4165115 95 90 98 Be <br /> Blank 94 90 98 90 <br /> LCS 96 90 99 91 <br /> MS 95 89 98 90 <br /> MSD 96 90 98 91 <br /> Limits 81-120 82-112 85-112 83-113 <br /> Analysis Name BTEX+5 Oxygenates+EDC+EDB+ETOH <br /> Batch number P033221AB <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 4165113 95 90 99 88 <br /> 4165114 95 89 98 89 <br /> 4165116 95 89 99 89 <br /> 4165117 96 88 99 88 <br /> 4165118 95 89 98 88 <br /> 4165119 96 89 99 Be <br /> 4165120 96 91 99 89 <br /> 4165121 96 89 99 88 <br /> Blank 97 89 99 89 <br /> LCS 96 90 99 91 <br /> Ms 95 89 98 90 <br /> MSD 96 90 98 91 <br /> Limits 81-120 82-112 85-112 83-113 <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 />