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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: 1082732 <br /> Reported: 04/02/08 at 01:09 PM <br /> Surrogate Quality Control <br /> 5310146 84 82 <br /> 5310147 0* 631* <br /> 5310148 76 87 <br /> 5310149 80 81 <br /> 5310150 0* 114 <br /> 5310151 68 78 <br /> Blank 90 88 <br /> DUP 91 85 <br /> LCS 83 104 <br /> MS 75 96 <br /> Limits: 37-125 47-145 <br /> Analysis Name: BTEX+MTBE by 8260B <br /> Batch number: A080851AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 5310146 95 95 89 83 <br /> 5310148 96 95 88 85 <br /> 5310149 97 93 88 83 <br /> 5310151 97 96 87 85 <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 /> Analysis Name: BTEX+MTBE by 8260B <br /> Batch number: R080861AB <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 5310147 83 83 118 83 <br /> 5310150 82 84 80 83 <br /> Blank 90 93 87 85 <br /> LCS 87 93 87 88 <br /> LCSD 90 94 91 92 <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 />