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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.larcasterIabs.com <br /> Page 4 of 4 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 1082757 <br /> Reported: 04/04/08 at 03:16 PM <br /> Surrogate Quality Control <br /> Limits: 71-114 70-109 70-123 70-111 <br /> Analysis Name: BTEX+MTBE by 8260B <br /> Batch number: A080861AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 5310291 93 89 91 83 <br /> 5310297 92 90 93 90 <br /> Blank 93 93 90 84 <br /> LCS 95 95 92 88 <br /> LCSD 96 94 92 88 <br /> MS 93 89 94 87 <br /> Limits: 71-114 70-109 70-123 70-111 <br /> Analysis Name: BTEX+MTBE by 8260B <br /> Batch number: R080861AB <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 5310296 77 78 86 103 <br /> Blank 90 93 87 85 <br /> LCS 87 93 87 88 <br /> LCSD 90 94 91 92 <br /> Limits: 71-114 70-109 70-123 70-111 <br /> *-Outside of specification <br /> **-This limit was used in the evaluation of the final result for the blank <br /> (1)The result for one or both determinations was less than five times the LOQ. <br /> (2)The unspiked result was more than four times the spike added. <br />