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Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike,PO Box 12425,Lancaster,PA 17605-2425•717-656-2300 Fax:717-656-2681•www.lancasterlabs.com <br /> Page 3 of 3 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 940723 <br /> Reported: 05/19/05 at 10:23 AM <br /> Surrogate Quality Control <br /> 4510257 104 <br /> 4510258 102 <br /> Blank 103 <br /> LCS 129 <br /> LCSD 131 <br /> Limits: 52-134 <br /> Analysis Name: EPA SW846/8260 (water-25ml) #1 <br /> Batch number: M051151AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 4510256 92 92 93 86 <br /> 4510257 91 91 95 88 <br /> 4510258 94 93 96 87 <br /> Blank 94 96 95 89 <br /> LCS 92 96 98 93 <br /> MS 96 100 97 95 <br /> MSD 91 98 95 94 <br /> Limits: 81-114 78-117 85-111 81-112 <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 />