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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: 1079255 <br /> Reported: 03/12/08 at 01:04 PM <br /> Surrogate Quality Control <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: A080601AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 5289727 94 90 94 82 <br /> 5289728 94 91 94 84 <br /> 5289729 94 91 94 83 <br /> 5289730 94 91 94 82 <br /> 5289731 95 95 93 83 <br /> 5289732 94 90 94 83 <br /> Blank 93 90 94 84 <br /> LCS 95 93 95 88 <br /> LCSD 94 92 95 87 <br /> MS 94 89 96 85 <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 />