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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 1 of l <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 970062 <br /> Reported: 12/09/05 at 02:16 PM <br /> Matrix QC may not be reported if site-specific QC samples were not <br /> submitted. In these situations,to demonstrate precision and accuracy at <br /> a batch level,a LCS/LCSD was performed,unless otherwise specified in the <br /> method. <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Units %REC %REC Limits RPD RPD Max <br /> Batch number: 053420016A Sample number(s) : 4663991 <br /> TPH-DRO(C10-C25)Water w/ SiGel N.D. 50. ug/l 101 49-120 <br /> Surrogate Quality Control <br /> Analysis Name: TPH-DRO(C10-C25)Water w/ SiGel <br /> Batch number: 053420016A <br /> Orthoterphenyl <br /> 4663991 93 <br /> Blank 105 <br /> LCS 87 <br /> Limits: 59-131 <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 />