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LancasterAnal sis Re ort ', <br /> Laboratories Y p <br /> 2425 New Hoiland Pika PO BOX 12425 Lancaster PA 17605-2925.717 656-23oo Fax 717-658 2681•www lancasterlabs com <br /> Page 4 of 4 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 948110 <br /> Reported 06/29/05 at 11 08 PM <br /> Surrogate Quality Control <br /> Limits 70-142 <br /> Analysis Name BTEX+5 Oxygenates+EDC+EDB+ETON <br /> Batch number Z051753AA <br /> Dibromofluoromethane i 2-Dichlcroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 4547134 92 91 95 69 <br /> 4547135 92 91 95 90 <br /> 4547136 93 92 94 88 <br /> 4547137 90 91 94 93 <br /> 4547138 91 92 94 88 <br /> 4547139 93 92 95 88 <br /> 4547140 93 91 94 86 <br /> 4547141 90 Be 95 93 <br /> 4547142 90 87 97 92 <br /> 4547143 93 91 95 Be <br /> 4547144 93 91 95 88 <br /> Blank 92 90 95 88 <br /> LCS 91 91 95 93 <br /> Ms 91 92 95 92 <br /> MSD 91 91 94 92 <br /> Limits 81-120 82-112 85-112 83-113 . <br /> Analysis Name BTEX+MTBE by 82608 <br /> Batch number Z051782AA <br /> Dibromofluoromethane 1,2-Dichlorcethane-d4 Toluene-de 4-8romofluorobenzene <br /> 4547133 99 93 101 92 <br /> - -Blank.97 95 101 92 - - <br /> LCS 98 96 101 96 <br /> Ms 98 93 101 94 <br /> MSD 99 92 101 95 <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 />