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LancasterAnalysis Report <br /> Laboratories Y p <br /> 2425 New Holland Pike Pp Box 12425 Lancaster PA 17605.2425•717-656-2300 Fax 717-656-2681•www Iancesterlabs COM <br /> Page 4 of 7 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 931884 <br /> Reported 02/25/05 at 10 34 AM <br /> Sample Matrix Quality Control <br /> Ms MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name %REC %RHC Limits RPD MAX Conc Conc RPD Max <br /> Ethyl t-butyl ether 93 93 78-119 0 30 <br /> t-Amyl methyl ether 91 90 77-117 0 30 <br /> t-Butyl alcohol 87 90 51-147 3 30 <br /> Benzene 97 96 83-128 1 30 <br /> 1,2-Dachloroethane 95 95 73-136 0 30 <br /> Toluene 97 97 83-127 0 30 <br /> 1,2-Dlbromoethane 90 91 78-120 1 30 <br /> Ethylbenzene 99 99 82-129 0 30 <br /> Xylene (Total) 98 97 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH Fuels by GC (Waters) <br /> Batch number 050470011A <br /> Chlorobenzene orthoterphenyl <br /> 65278 83 92 <br /> 40 65279 110 82 <br /> 65280 78 88 <br /> 4465281 85 105 <br /> 4465282 83 91 <br /> 4465263 74 89 <br /> 4465284 81 92 <br /> 4465285 316* 150 <br /> 4465286 365* 118 <br /> 4465287 74 88 <br /> 4465288 79 86 <br /> Blank 94 91 <br /> LCS 96 109 <br /> LCSD 102 lie <br /> Limits 33-146 53-155 <br /> Analysis Name TPH-DRO CALUFT(Waters) <br /> Batch number 050470012A <br /> Orthoterphenyl <br /> 4465278 94 <br /> 4465279 94 <br /> 4465280 93 <br /> 4465261 92 <br /> 4465282 85 <br /> 4465283 89 <br /> 4465284 93 <br /> 4465285 280* <br /> 4465286 114 <br /> 4465287 91 <br /> 4465288 90 <br /> Blank 97 <br /> LCS 113 <br /> LCSD 114 <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ <br /> �) The background result was more than four times the spike added <br />