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Lancaster <br /> Laboratories Analysis 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 2 of 3 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 952085 <br /> Reported: 08/15/05 at 05:40 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> TPH-GRO - Waters 121 63-154 <br /> Batch number: 05203A07C Sample number(s) : 4567127-4567130 <br /> TPH-GRO - Waters 121 63-154 <br /> Batch number: Z052063AA Sample number(s) : 4567124-4567130 <br /> Benzene 102 97 83-128 6 30 <br /> Toluene 105 98 83-127 6 30 <br /> Ethylbenzene 103 97 82-129 6 30 <br /> Xylene (Total) 97 92 82-130 5 30 <br /> Surrogate Quality Control <br /> Analysis Name: Selected SVOAs by 8270 SIM <br /> Batch number: 05202WAGO26 <br /> Nitrobenzene-d5 2-Fluorobiphenyl Terphenyl-d14 <br /> 4567124 91 86 104 <br /> 4567125 92 92 104 <br /> 4567126 93 88 91 <br /> 4567128 95 87 93 <br /> 4567129 95 91 93 <br /> 4567130 92 86 86 <br /> Blank 89 88 101 <br /> LCS 91 88 105 <br /> LCSD 97 88 108 <br /> Limits: 52-148 48-131 49-140 <br /> Analysis Name: TPH-GRO - Waters <br /> Batch number: 05203A07B <br /> Trifluorotoluene-F <br /> 4567124 93 <br /> 4567125 82 <br /> 4567126 85 <br /> Blank 83 <br /> LCS 102 <br /> LCSD 106 <br /> MS 117 <br /> Limits: 70-142 <br /> Analysis Name: TPH-GRO - Waters <br /> Batch number: 05203A07C <br /> Trifluorotoluene-F <br /> 4567127 84 <br /> 4567128 85 <br /> 4567129 84 <br /> 4567130 87 <br /> Blank 85 <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 />