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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 3 of 5 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 975894 <br /> Reported: 02/16/06 at 03:16 PM <br /> Sample Matrix Quality Control <br /> Unspiked (UNSPK) = the sample used in conjunction with the matrix spike <br /> Background (BKG) = the sample used in conjunction with the duplicate <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> TPH-GRO - Waters 117 116 63-154 1 30 <br /> Benzene 99 103 78-131 3 20 <br /> Toluene 104 108 78-129 3 30 <br /> Ethylbenzene 106 110 75-133 4 30 <br /> Total Xylenes 107 110 80-134 3 30 <br /> Batch number: 06037A54B Sample number(s) : 4696988,4696993-4696994 UNSPK: P696992 <br /> TPH-GRO - Waters 117 116 63-154 1 30 <br /> Benzene 99 103 78-131 3 20 <br /> Toluene 104 108 78-129 3 30 <br /> Ethylbenzene 106 110 75-133 4 30 <br /> Total Xylenes 107 110 80-134 3 30 <br /> Surrogate Quality Control <br /> Surrogate recoveries which are outside of the QC window are confirmed <br /> unless attributed to dilution or otherwise noted on the Analysis Report. <br /> Analysis Name: TPH-DRO (C10-C25) Water <br /> Batch number: 060280015A <br /> Orthoterphenyl <br /> 4696988 100 <br /> 4696989 95 <br /> 4696990 92 <br /> 4696991 92 <br /> 4696992 102 <br /> 4696993 98 <br /> 4696994 101 <br /> 4696995 91 <br /> 4696996 95 <br /> 4696997 98 <br /> Blank 103 <br /> LCS 124 <br /> LCSD 122 <br /> Limits: 59-131 <br /> Analysis Name: Selected SVOAs by 8270 SIM <br /> Batch number: 06028WAA026 <br /> Nitrobenzene-d5 2-Fluorobiphenyl Terphenyl-d14 <br /> 4696988 87 89 96 <br /> 4696989 89 86 95 <br /> 4696990 81 85 91 <br /> 4696991 88 86 91 <br /> 4696995 79 84 89 <br /> 4696996 90 89 93 <br /> 4696997 84 87 90 <br /> Blank 87 88 94 <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 />