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Lancaster <br /> r Laboratories <br /> Page 2 of 2 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 886333 <br /> Reported: 03/10/04 at 03:34 .PM <br /> Sample Matrix Quality Control j <br /> MS MSD MS/MSD RPD HRG DUP DUP DUP <br /> Analysis Name $REC $REC Limits RPD <br /> RPD MAX Conc Conc RPD Max <br /> Toluene 85 73 61-114 15 30 <br /> Ethylbenzene 95 81 66-110 15 30 <br /> Total Xylenes 91 78 66-112 15 30 <br /> Surrogate Quality Control <br /> Analysis Name: Custom TPH with Ranges (soil) <br /> Batch number: 040610001A <br /> Chlorobenzene Orthoterphenyl <br /> 4224582 97 95 <br /> Blank 105 95 <br /> LCS 116 84 <br /> LCSD 118 89 <br /> Limits: 27-122 54-137 <br /> � fAnalysis Name: BTEX <br /> 4w Hatch number: 04062A31A <br /> Trifluorotoluene-P <br /> 4224582 104 <br /> Blank 113 <br /> LCS 113 <br /> MS 96 <br /> MSD 102 <br /> I <br /> Limits: 72-122 <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 /> II f <br /> i <br /> Lancaster Laboratories,Inc. <br /> M E M IS E R 2425 New Holland Pike <br /> PO Box 12425 <br /> Lancaster.PA 17605.2425 <br /> 17.656-2.3300 F7x:?17-ii56.2fiR1 <br /> i <br />