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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.lancasterlabs.com <br /> Page 4 of 4 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 945012 <br /> Reported: 06/10/05 at 03:08 PM <br /> Surrogate Quality Control <br /> Analysis Name: BTEX <br /> Batch number: 05152A34A <br /> Trifluorotoluene-F Trifluorotoluene-P <br /> 4532201 89 <br /> Blank 89 99 <br /> LCS 94 111 <br /> MS 74 84 <br /> MSD 68 86 <br /> Limits: 61-122 63-126 <br /> Analysis Name: BTEX <br /> Batch number: 05152A51A <br /> Trifluorotoluene-F Trifluorotoluene-P <br /> 4532200 107 86 <br /> Blank 113 88 <br /> LCS 115 89 <br /> LCSD 117 88 <br /> MS 112 89 <br /> Limits: 70-142 69-137 <br /> Analysis Name: BTEX <br /> Batch number: 05153A15B <br /> Trifluorotoluene-P <br /> 4532202 130 <br /> Blank 129 <br /> LCS 128 <br /> LCSD 129 <br /> MS 126 <br /> Limits: 69-137 <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ. <br /> (2) The background result was more than four times the spike added. <br />