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Lancaster <br /> • Laboratories Analysis Report <br /> 2425 New Holland Pike,PO Box 12425,Lancaster,PR 17605-2425•717-656-2300 Fax:717-65&2681•www.lancasteriabs.com <br /> Page 2 of 3 <br /> Quality Control Summary <br /> Client Name: ChevronTexaco Group Number: 913642 <br /> Reported: 10/06/04 at 04:15 AM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD EKG DUP AQP Dup RPD <br /> Analysis Name %REC &RSC Limits RPD MAIC Conc Conc RPD Maw <br /> t-Butyl alcohol 102 96 51-147 7 30 <br /> Ethylbenzene 97 102 82-129 5 30 <br /> Surrogate Quality Control <br /> Analysis Name: TPH-GRO - Waters <br /> Batch number: 04271A16A <br /> Trifluorotoluene-F <br /> 4361176 110 <br /> 4361177 108 <br /> 4361178 117 <br /> 4361179 101 <br /> 4361180 116 <br /> 4361181 127 <br /> 4361182 110 <br /> 4361183 108 <br /> 4361184 107 <br /> Blank 106 <br /> LCS 110 <br /> LCSD 110 <br /> MS 113 <br /> Limits: 57-146 <br /> Analysis Name: BTEX+5 Oxygenates+EDC+EDB <br /> Batch number: Z042771AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-dB 4-Bromofluorobenzene <br /> 4361176 100 93 94 85 <br /> 4361177 107 103 95 89 <br /> 4361178 101 97 96 92 <br /> 4361179 108 101 95 88 <br /> 4361180 107 101 95 86 <br /> 4361181 104 102 95 95 <br /> 4361182 104 100 95 86 <br /> 4361183 102 95 95 88 <br /> 4361184 105 100 93 86 <br /> Blank 104 102 93 67 <br /> LCS 103 101 94 93 <br /> MS 105 100 96 96 <br /> MSD 106 98 96 94 <br /> Limits: 81-120 82-112 85-112 83-113 <br /> Analysis Name: 8260 Master Scan (water) <br /> Batch number: Z042781AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-dB 4-Bromofluorobenzene <br /> Blank 94 86 96 86 <br /> LCS 92 89 96 92 <br /> MS 97 94 96 95 <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 /> i <br />