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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: 1082250 <br /> Reported: 04/02/08 at 10:57 AM <br /> Surrogate Quality Control <br /> 5307585 96 88 99 <br /> 5307586 97 88 100 <br /> 5307587 93 85 95 <br /> 5307588 239* 110 96 <br /> 5307589 994* 90 114 <br /> 5307590 87 80 93 <br /> Blank 102 95 102 <br /> LCS 102 95 101 <br /> MS 101 94 98 <br /> MSD 101 94 100 <br /> Limits: 53-152 63-129 66-142 <br /> Analysis Name: BTEX+MTBE by 8260B <br /> Batch number: A080851AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 5307582 93 88 90 83 <br /> 5307583 95 89 89 83 <br /> 5307584 96 94 88 83 <br /> 5307585 96 93 89 82 <br /> 5307586 96 93 89 81 <br /> 5307587 98 97 87 83 <br /> 5307588 98 98 85 142* <br /> 5307589 96 93 87 87 <br /> 5307590 96 93 88 86 <br /> Blank 96 95 88 84 <br /> LCS 97 96 89 89 <br /> LCSD 97 93 90 89 <br /> MS 96 91 91 88 <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 />