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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: 1082853 <br /> Reported: 04/10/08 at 06:55 PM <br /> Surrogate Quality Control <br /> 5311125 282* 82 103 <br /> Blank 109 98 108 <br /> LCS 104 95 105 <br /> MS 108 94 101 <br /> MSD 112 97 108 <br /> Limits: 53-152 63-129 66-142 <br /> Analysis Name: BTEX+MTBE by 8260B <br /> Batch number: A080861AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 5311119 93 92 91 83 <br /> 5311120 93 90 92 82 <br /> 5311121 95 96 90 84 <br /> 5311123 93 91 91 83 <br /> 5311124 95 95 90 84 <br /> 5311126 94 91 92 82 <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 /> 5311122 82 83 82 86 <br /> 5311125 83 83 95 95 <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 />