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Lancaster <br /> _ Laboratories Analyses Report <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 17605-2425•717 656 2300 Fax 717-656-2681•www lancasterlabs com <br /> Page 6 of 7 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 943162 <br /> Reported 05/23/05 at 01 43 PM <br /> Sample Matrix Quality Control <br /> Ms MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> A_nalvsie Name %RSC.' %RHC Limits RPD MAX Conc Conc RPA Max <br /> Toluene 103 101 83-127 2 30 <br /> Ethylbenzene 101 99 82-129 3 30 <br /> Xylene (Total) 101 98 82-130 3 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-DRO CALUFTIWaters) <br /> Batch number 051330D15A <br /> Orthoterphenyl <br /> 4522833 85 <br /> Blank 93 <br /> LCS 120 <br /> MS 104 <br /> MSD 104 <br /> Limits 52-134 • <br /> Analysis Name TCL SWB46 Semivolatiles/Waters <br /> Batch number 05133WAA026 <br /> 2-Fluorophenol Phenol-d6 2,4,6-Trxbromophenol Nitrobenzene-d5 <br /> 4522833 58 39 103 80 <br /> Blank 62 38 114 91 <br /> LCS 60 36 102 85 <br /> MS 58 40 100 88 <br /> MSD 56 41 102 85 <br /> Limits 10-99 10-80 31-148 51-123 <br /> 2-Fluorobiphenyl Terphenyl-d14 <br /> 4522833 84 107 <br /> Blank 94 121 <br /> LCS 87 113 <br /> MS 89 113 <br /> MSD 88 116 <br /> Limits 64-112 53-135 <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 05137AOSB <br /> Trifluorotoluene-F <br /> 4522832 101 <br /> 4522833 97 <br /> 4522835 98 <br /> Blank 99 <br /> LCS 101 <br /> LCSD 101 <br /> MS 102 <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 />