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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: 944279 <br /> Reported: 06/14/05 at 05:33 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: Z051472AA Sample number(s) : 4528314,4528316-4528317 <br /> Benzene 99 100 83-128 0 30 <br /> Toluene 104 101 83-127 3 30 <br /> Ethylbenzene 105 103 82-129 2 30 <br /> Xylene (Total) 103 102 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name: Selected SVOAs by 8270 SIM <br /> Batch number: 05142WAA026 <br /> Nitrobenzene-d5 2-Fluorobiphenyl Terphenyl-d14 <br /> 4528314 117 98 96 <br /> 4528316 114 101 99 <br /> Blank 116 102 104 <br /> LCS 113 100 105 <br /> LCSD 115 98 103 <br /> Limits: 48-162 48-131 51-132 <br /> Analysis Name: TPH-DRO CALUFT(Waters) <br /> Batch number: 051430016A <br /> Orthoterphenyl <br /> 4528314 79 <br /> 4528316 100 <br /> Blank 105 <br /> LCS 101 <br /> LCSD 100 <br /> Limits: 52-134 <br /> Analysis Name: Custom TPH with Ranges (soil) <br /> Batch number: 051450021A <br /> Chlorobenzene Orthoterphenyl <br /> 4528313 5* 45 <br /> 4528315 6* 73 <br /> 4528318 10* 90 <br /> 4528319 6* 78 <br /> 4528320 4* 47 <br /> 4528321 6* 78 <br /> Blank 57 94 <br /> LCS 83 105 <br /> LCSD 59 107 <br /> Limits: 22-149 22-170 <br /> Analysis Name: TPH-GRO - Waters <br /> Batch number: 05145AO8A <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 />