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Lancaster <br /> i Laboratories analysis Report <br />' 2425 New Holland Pike Pp Box 12425 Lancaster PA 17605-2425 717-656 2300 Fax 717 656.2681•www lancasterlabs cam <br /> Page 2 of 3 <br />' Quality Control Summary <br /> Client Name ChevronTexaco Group Number 884302 <br />' Reported 02/20/04 at 04 52 PM <br /> Sample Matrix Quality Control <br /> NS MSD Ms/MSA RPD BKO DUP DUP Dup <br /> RPD <br /> Analysis Name AREC %RBC Limits RPD MAX Conc Conc RPD max <br /> Ethanol 50 58 41-155 14 30 <br /> Methyl Tertiary Butyl Ether 105 96 69-134 9 30 <br /> di-Isopropyl ether 108 99 75-130 9 30 <br /> Ethyl t-butyl ether 167 98 76-119 9 30 <br />' t-Amyl methyl ether 104 94 77-117 10 30 <br /> t-Butyl alcohol 65 61 51-147 6 30 <br /> Benzene 109 101 83-128 8 30 <br /> 1,2-D1chloroethane 100 91 73-136 9 30 <br /> Toluene 105 97 83-127 8 30 <br /> 1,2-Dibromoethane 91 83 78-120 9 30 <br />' Ethylbenzene 108 99 8 2-12 9 9 30 <br /> Xylene (Total) 106 98 B2-130 7 30 <br /> Batch number P040471AA Sample number(s) 4213932 <br /> Methyl Tertiary Butyl Ether 93 92 69-134 1 30 <br />' Benzene 103 102 83-128 0 30 <br /> Toluene 97 96 8 3-12 7 1 30 <br /> Ethylbenzene 96 96 82-129 0 30 <br /> Xylene (Total) 95 95 82-130 0 30 <br />' Batch number P040482AA Sample number(s) 4213931 <br /> Ethanol 72 78 41-155 9 30 <br /> Methyl Tertiary Butyl Ether 83 83 69-134 0 30 <br /> di-Isopropyl ether 95 96 75-130 1 30 <br /> Ethyl t-butyl ether 89 90 78-119 1 30 <br />' t-Amyl methyl ether 82 84 77-117 3 30 <br /> t-Butyl alcohol 79 79 51-147 0 30 <br /> Benzene 92 93 83-128 0 30 <br /> 1,2-Dichloroethane 83 B3 73-136 0 30 <br /> Toluene 91 90 83-127 1 30 <br /> 1,2-Dibromoethane 82 83 78-120 1 30 <br />' Ethylbenzene 90 88 82-129 2 30 <br /> Xylene (Total) 89 89 82-130 0 30 <br />' Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 04043AO7B <br />' Tri€luorotoluene-F <br /> 4213928 79 <br /> 4213929 80 <br /> 4213930 79 <br />' 4213931 79 <br /> Blank 84 <br /> LCS 102 <br /> MS 103 <br /> MSD 104 <br />' Limits 57-146 <br /> Analysis Name Methanol and Ethanol <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 />