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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 5 of 5 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 944535 <br /> Reported: 06/06/05 at 03:16 PM <br /> Surrogate Quality Control <br /> Batch number: Z051501AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 4529800 97 97 97 92 <br /> 4529803 97 96 96 92 <br /> Blank 96 96 96 92 <br /> LCS 96 96 95 94 <br /> MS 96 97 96 95 <br /> MSD 97 97 96 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 />