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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 3 of 3 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 1079256 <br /> Reported: 03/12/08 at 11:57 AM <br /> Surrogate Quality Control <br /> LCS 97 96 101 <br /> MS 112 97 91 <br /> MSD 96 82 77 <br /> Limits: 53-152 63-129 66-142 <br /> Analysis Name: BTEX+MTBE by 8260B <br /> Batch number: A080631AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 5289733 94 92 92 84 <br /> 5289734 93 89 93 83 <br /> 5289735 94 92 93 83 <br /> 5289736 95 91 92 83 <br /> 5289737 94 91 93 84 <br /> 5289738 94 91 92 82 <br /> 5289739 95 92 93 84 <br /> 5289740 94 90 93 84 <br /> Blank 95 95 91 86 <br /> LCS 96 94 92 88 <br /> LCSD 96 94 93 87 <br /> MS 95 88 94 87 <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 />