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* M <br /> LancasterReport <br /> Laboratories Analysis p <br /> 2425 New Holland Pike,Pp Box 12425,Lancaster,PA 17605.2425•717.656-2300 Fax:717-656-2681•W WW.lancastartabs.com <br /> Page 2 of 4 <br /> Quality Control Summary <br /> Client Name: ChevronTexaco Group Number: 969309 <br /> Reported: 12/13/05 at 11:08 AM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BkG DUP DUP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Cone coup RPD Max <br /> Batch number: 053460025A Sample number(s) : 4659272-4659278 <br /> Methanol (by Direct Injection) 111 111 66-133 0 20 <br /> Batch number: 05346A53A Sample number(s) : 4659278 <br /> TPH-GRO - Waters 100 63-154 <br /> Batch number: Z053391AA Sample number(s) : 4659271-4659272 <br /> Ethanol 110 110 26-162 0 30 <br /> Methyl Tertiary Butyl Ether 94 90 69-134 3 30 <br /> di-Isopropyl ether 93 94 75-130 0 30 <br /> Ethyl t-butyl ether 93 93 78-119 0 30 <br /> t-Amyl methyl ether 94 94 72-125 0 30 <br /> t-Butyl alcohol 95 94 56-134 1 30 <br /> Benzene 100 100 83-128 0 30 <br /> 1,2-Dichloroethane 96 96 70-143 1 30 <br /> Toluene 101 102 83-127 1 30 <br /> Dibromoethane 87 88 78-120 1 30 <br /> Wttlbenzene 101 lag 82-129 1 30 <br /> e (Total) 102 103 B2-130 1 30 <br /> Batch number: Z053411AA Sample number(s) : 4659273-4659278 <br /> Ethanol 115 114 26-162 2 30 <br /> Methyl Tertiary Butyl Ether 92 93 69-134 0 30 <br /> di-Isopropyl ether 88 88 75-130 0 30 <br /> Ethyl t-butyl ether B8 88 78-119 0 30 <br /> t-Amyl methyl ether 92 92 72-125 0 30 <br /> t-Butyl alcohol 93 93 56-134 0 30 <br /> Benzene 99 100 83-128 1 30 <br /> 1,2-Dichloroethane 96 97 70-143 1 30 <br /> Toluene 104 103 83-127 0 30 <br /> 1,2-Dibromoethane 89 89 78-120 0 30 <br /> Ethylbenzene 102 102 B2-129 0 30 <br /> Xylene (Total) 106 106 82-130 0 30 <br /> Surrogate Quality Control <br /> Analysis Name: TPH Fuels by GC (Waters) <br /> Batch number: 053350017A <br /> Chlorobenzene orthoterphenyl <br /> 4659272 104 79 <br /> 4659273 117 63 <br /> 4659274 87 75 <br /> 4659275 340'+ 76 <br /> 4659276 119 75 <br /> 4659277 90 79 <br /> 4659278 125 81 <br /> Blank 79 70 <br /> LCS 78 75 <br /> *-Outside of specification <br /> 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 />