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OilLancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike PO Bax 12425 Lancaster PA 17605-2425 717 656.2300 Fax 717 656-2681 www lancasteriabs com <br /> Page 4 of 7 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 918531 <br /> Reported 11/11/04 at 06 35 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result NDL Units %R$C %RBC Limits RPD RPD Max <br /> 2-Butanone N D 3 ug/l 101 44-163 <br /> trans-l,3-Dichloropropene N D 1 ug/l 102 79-114 <br /> cis-1 3-Dlchloroprcpene N D 1 ug/l 101 78-114 <br /> 4-Methyl-2-pentanone N D 3 ug/l 112 57-133 <br /> 2-Hexanone N D 3 ug/l 117 47-150 <br /> 2-Chloroethyl Vinyl Ether N D 2 ug/l 85 60-129 <br /> Freon 113 N D 2 ug/1 107 73-140 <br /> Batch number Z04313lAA Sample number(s) 439232B 4391331-4391333 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 96 77-127 <br /> Benzene N D 5 ug/1 94 85-117 <br /> Toluene N D 5 u9/1 96 85-115 <br /> Ethylbenzene N D 5 ug/l 98 82-119 <br /> Xylene (Total) N D 5 ug/l 97 83-113 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKQ DUP DUP Dup RPD <br /> Analysis Name %REC %RRC Limits RPD MAX Cone Conc RPD Max <br /> Batch number 04306112601A Sample number(s) 4391329 <br /> TRPH 418 1 N D N D 47* (1) 34 <br /> Batch number 04307A53A Sample number(s) 4391328-4391329,4391331-4391332 <br /> TPH-GRO - Waters 110 63-154 <br /> Batch number 04307A53B Sample number(B) 4391333 <br /> TPH-GRO - Waters 110 63-154 <br /> Batch number 043101848001 Sample number(s) 4391330 <br /> Cadmium 96 95 87-117 1 20 N D N D 0 (1) 20 <br /> Chromium 97 97 86-118 1 20 N D N D 0 (1) 20 <br /> Lead 95 96 87-118 1 20 N D N D 0 (1) 20 <br /> Nickel 96 97 91-111 1 20 N D N D 0 (1) 20 <br /> zinc 94 95 60-120 1 20 N D N D 0 (1) 20 <br /> Batch number N043061AA Sample number(s) 4391329 <br /> Ethanol 130 134 33-153 3 30 <br /> Methyl Tertiary Butyl Ether 101 103 69-134 2 30 <br /> di-Isopropyl ether 128 130 75-130 2 30 <br /> Ethyl t-butyl ether 100 102 78-119 1 30 <br /> t-Amyl methyl ether 95 96 77-117 0 30 <br /> t-Butyl alcohol 90 92 51-147 2 30 <br /> Dichlorodifluoromethane 158 166 58-215 5 30 <br /> Chloromethane 156 158* 69-157 2 30 <br /> Vinyl Chloride 135 139 70-151 2 30 <br /> Bromomethane 113 114 59-143 0 30 <br /> Chloroethane 131 133 63-142 2 30 <br /> Trichlorofluoromethane 151 150 67-163 1 30 <br /> 1,1-Dzchloroethene 115 116 78-146 1 30 <br /> Methylene Chloride 106 106 '79-133 0 30 <br /> trans-1,2-Dichloroethene 102 104 82-133 2 30 <br /> 1,1-Dichloroethane 126 123 85-135 2 30 <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 />