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Lancaster <br /> Laboratories Analysis Report j <br /> 2425 Now Holland Pike,PO Box 12425,Lancaster,PA 17605-2425•717-656-2300 Fax 717.656.2681•www.lancasterlabs.com ' <br /> Page 2 of 3 <br /> Quality Control Summary <br /> Client Name: ChevronTexaco Group Number: 912634 <br /> Reported: 09/23/04 at 11:16 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD EKG DVP DDP Dup APD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Cane RPD Max <br /> Ethyl t-butyl ether 94 99 7B-119 1 30 <br /> t-Amyl methyl ether 96 99 77-117 2 30 <br /> t-Butyl alcohol 90 91 51-147 0 30 <br /> Benzene 99 99 83-126 0 30 <br /> 1,2-Dichloroethane 100 100 73-136 0 30 <br /> Toluene 100 98 83-127 3 30 E <br /> 12-Dibromoethane 95 94 78-120 1 30 <br /> Lhylbenzene 98 97 82-129 1 30 <br /> Xylene (Total) 95 95 82-130 1 30 <br /> Batch number: Z042661AA Sample number(s) : 4355084 i 1 <br /> Ethanol 83 73 33-153 13 30 i <br /> di-Isopropyl ether 95 95 75-13G 0 30 <br /> Ethyl t-butyl ether 94 95 78-119 2 30 <br /> t-Amyl methyl ether 96 96 77-117 2 30 <br /> t-Butyl alcohol 90 101 51-147 12 30 <br /> Benzene 101 101 83-128 1 30 <br /> 1,2-Dichloroethane 94 93 73-136 1 30 <br /> Toluene 99 100 83-127 2 30 <br /> 1,2-Dibromoethane 97 96 78-120 1 30 <br /> Ethylbenzene 97 100 82-129 3 30 E <br /> Xylene (Total) 96 98 82-130 3 30 <br /> Surrogate Quality Control <br /> i <br /> Analysis Name: TPH-GRO - Waters <br /> Batch number: 04261AIGA <br /> Trifluorotoluene-F + . <br /> 4355084 107 <br /> 4355085 109 <br /> 4355086 110 <br /> 4355087 63 <br /> Blank 108 I� I <br /> LCS 112 <br /> LCSD 110 <br /> MS 111 <br /> Limits: 57-146 <br /> i <br /> Analysis Name: BTEX+5 0xygenates+EAC+EDB+ET0H <br /> Batch number: Z042651AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-dB 4-Bromofluorobenzene <br /> 4355085 102 101 96 89 ' I <br /> 4355086 97 93 95 88 <br /> 4355087 98 92 96 87 <br /> Blank 98 94 95 88 <br /> LCS 97 94 95 94 <br /> MS 98 96 95 95 <br /> MSD 99 97 97 94 <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ. r <br /> (2) The background result was more than four times the spike added. <br /> I <br />