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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 Mgmt Co Group Number: 1203972 <br /> Reported: 07/28/10 at 02:06 PM <br /> Sample Matrix Quality Control <br /> Unspiked (UNSPK) = the sample used in conjunction with the matrix spike <br /> Background (EKG) = the sample used in conjunction with the duplicate <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name $RBC %REC Limits RPD MAX Conc Conc RPD Max <br /> Toluene 109 107 83-127 2 30 <br /> Xylene (Total) 110 108 84-125 2 30 <br /> Surrogate Quality Control <br /> Surrogate recoveries which are outside of the QC window are confirmed <br /> unless attributed to dilution or otherwise noted on the Analysis Report. <br /> Analysis Name: VOCs 25 ml purge 8260 <br /> Batch number: G102022AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 6037215 102 97 100 92 <br /> Blank 104 99 101 90 <br /> LCS 100 100 106 99 <br /> MS 98 97 106 98 <br /> MSD 99 97 105 99 <br /> Limits: 77-114 74-113 77-110 78-110 <br /> Analysis Name: PAHs in waters by SIM <br /> Batch number: 10202WAH026 <br /> Nitrobenzene-d5 2-Fluorobiphenyl Terphenyl-d14 <br /> 6037215 84 84 74 <br /> Blank 88 85 76 <br /> LCS 87 84 72 <br /> LCSD 90 84 73 <br /> Limits: 64-147 68-132 53-129 <br /> Analysis Name: TPH-DRO water C10-C25 <br /> Batch number: 102030013A <br /> Orthoterphenyl <br /> 6037215 103 <br /> Blank 95 <br /> LCS 98 <br /> LCSD 112 <br /> Limits: 45-114 <br /> Analysis Name: TPH-DRO water C10-C25 w/Si Gel <br /> Batch number: 102090111A <br /> Orthoterphenyl <br /> 6037215 91 <br /> Blank 77 <br /> LCS 87 <br /> LCSD 100 <br /> *-Outside of specification <br /> (1)The result for one or both determinations was less than five times the LOQ. <br /> (2)The unspiked result was more than four times the spike added. <br />