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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: 944535 <br /> Reported: 06/06/05 at 03:16 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Total Xylenes 97 97 54-134 0 30 <br /> Batch number: Z051501AA Sample number(s) : 4529800,4529803 <br /> Benzene 105 106 83-128 1 30 <br /> Toluene 100 99 83-127 1 30 <br /> Ethylbenzene 119 126 82-129 6 30 <br /> Xylene (Total) 109 110 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name: Selected SVOAs by 8270 SIM <br /> Batch number: 05144WAGO26 <br /> Nitrobenzene-d5 2-Fluorobiphenyl Terphenyl-d14 <br /> 4529800 54 61 78 <br /> Blank 76 79 79 <br /> LCS 72 76 78 <br /> LCSD 82 84 94 <br /> Limits: 48-162 48-131 51-132 <br /> Analysis Name: TPH-DRO CALUFT(Waters) <br /> Batch number: 051450012A <br /> Orthoterphenyl <br /> 4529800 114 <br /> Blank 88 <br /> LCS 110 <br /> LCSD 114 <br /> Limits: 52-134 <br /> Analysis Name: TPH-GRO - Waters <br /> Batch number: 05146A07B <br /> Trifluorotoluene-F <br /> 4529800 93 <br /> Blank 93 <br /> LCS 121 <br /> LCSD 122 <br /> MS 116 <br /> Limits: 70-142 <br /> Analysis Name: Selected SVOA's in soil by SIM <br /> Batch number: 05146SLB026 <br /> Nitrobenzene-d5 2-Fluorobiphenyl Terphenyl-d14 <br /> 4529802 96 93 108 <br /> 4529804 96 95 100 <br /> 4529805 99 95 104 <br /> Blank 93 93 100 <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 />