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Analysis p • <br /> Lancaster Laboratories Page 2 of 3 <br /> Where quality is a saence • <br /> Quality Control Summary <br /> Client Nance ChevronTexaco Group Number 815915 <br /> Reported 08/05/02 at 07 41 PM <br /> Sample Matrix Quality Control <br /> Ids XSD US/MSD RPD S&Q DUP DUP DuP <br /> RPD <br /> Aaalvsis Nacre RBC %R$C Lim_ita RPD MAX ConC Conc PV <br /> di-Isopropyl ether 117 ll8 68-133 1 30 <br /> Ethyl t-butyl ether 101 102 73-123 0 30 <br /> t-Amyl methyl ether 94 94 69-118 0 30 <br /> t-Butyl alcohol 69 70 51-148 2 30 <br /> Benzene 111 111 78-134 0 30 <br /> Toluene 107 107 83-127 0 30 <br /> Ethylbenzene 110 109 82-134 0 30 <br /> Xylene (Total) 108 109 82-130 0 30 <br /> Surrogate Quality Control <br /> Analysis Name. Methanol and Ethanol <br /> Batch number 022050005A <br /> Acetone <br /> 3859799 103 <br /> 3859800 104 <br /> 3859801 101 <br /> Blank 100 <br /> LCS 99 <br /> MS 100 <br /> MSD 103 <br /> Limits 72-128 . <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 02211A02A <br /> Trifluorotoluene-F <br /> 3859798 81 <br /> 3859799 80 <br /> 3859800 81 <br /> 3859601 81 <br /> Blank 80 <br /> LCS 91 <br /> LCSD 91 <br /> MS 97 <br /> MSD 98 <br /> Limits 57-146 <br /> Analysis Name BTEX + Oxygenates by 8260B <br /> Batch number N022062AA <br /> Dibromofiuoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 3859801 106 96 100 98 <br /> Blank 106 98 99 97 <br /> LCS 105 96 103 106 <br /> MS 105 96 103 105 <br /> MSD 105 97 102 106 <br /> Limits 86-118 80-120 88-110 86-115 <br /> Analysis Name BTBX + Oxygenates by 8260B <br /> Batch number N022101AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five tames the LOQ . <br /> (2) The background result was more than four times the spike added <br /> Lancaster Laboratories Inc <br /> M E M B E R 2425 New Holland Pike <br /> PO Box 12425 <br /> Lancaster PA 17605 2425 <br /> 717 656-2300 fax 717-656-2681 2216 Rev 9/11100 <br />