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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.lancasterIabs.com <br /> Page 4 of 4 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgmt Co Group Number: 1171046 <br /> Reported: 11/24/09 at 03:54 PM <br /> Surrogate Quality Control <br /> Chlorobenzene Orthoterphenyl <br /> 5837110 95 88 <br /> 5837111 96 89 <br /> 5837112 96 88 <br /> 5837113 97 90 <br /> 5837114 91 88 <br /> 5837115 95 89 <br /> 5837116 96 89 <br /> 5837117 97 89 <br /> 5837118 97 89 <br /> 5837119 150* 116 <br /> Blank 96 89 <br /> LCS 96 99 <br /> LCSD 95 97 <br /> Limits: 49-125 59-129 <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 />