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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: 1083640 <br /> Reported: 04/10/08 at 04:09 PM <br /> Surrogate Quality Control <br /> Blank 85 94 101 <br /> LCS 87 100 99 <br /> MS 93 104 101 <br /> MSD 92 101 99 <br /> Limits: 53-152 63-129 66-142 <br /> Analysis Name: BTEX+MTBE by 8260B <br /> Batch number: B080932AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 5315768 93 92 91 86 <br /> 5315769 92 91 93 78 <br /> 5315770 94 97 92 81 <br /> 5315771 93 91 91 77 <br /> 5315772 94 87 92 80 <br /> 5315773 86 84 89 80 <br /> 5315774 90 89 89 76 <br /> Blank 96 95 91 83 <br /> LCS 93 88 94 89 <br /> LCSD 93 89 94 90 <br /> MS 87 88 92 86 <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 />