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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.lancasterIabs.com <br /> Page 2 of 3 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgmt Co Group Number: 1171672 <br /> Reported: 12/02/09 at 12:46 PM <br /> Unspiked (UNSPK) = the sample used in conjunction with the matrix spike <br /> Background (BKG) = the sample used in conjunction with the duplicate <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number: C093271AA Sample number(s) : 5841388 UNSPK: P839239 <br /> Benzene 101 87-126 <br /> Ethylbenzene 104 80-140 <br /> Toluene 105 83-127 <br /> Xylene (Total) 104 84-125 <br /> Batch number: C093281AA Sample number(s) 5841389 UNSPK: P843415 <br /> Benzene 102 87-126 <br /> Ethylbenzene 104 80-140 <br /> Toluene 104 83-127 <br /> Xylene (Total) 106 84-125 <br /> Batch number: G093271AA Sample number(s) 5841390 UNSPK: P842310 <br /> Benzene 102 106 87-126 4 30 <br /> Ethylbenzene 100 105 80-140 5 30 <br /> Toluene 102 106 83-127 4 30 <br /> Xylene (Total) 93 100 84-125 7 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: EPA SW846/8260 (water-25ml) #1 <br /> Batch number: C093271AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 5841388 92 88 87 85 <br /> Blank 93 90 87 86 <br /> LCS 91 88 89 89 <br /> LCSD 91 87 89 89 <br /> MS 91 89 89 90 <br /> Limits: 77-114 74-113 77-110 78-110 <br /> Analysis Name: EPA SW846/8260 (water-25ml) #1 <br /> Batch number: C093281AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 5841389 96 89 87 86 <br /> Blank 94 88 88 86 <br /> LCS 92 89 89 92 <br /> LCSD 91 88 90 92 <br /> MS 93 88 90 93 <br /> Limits: 77-114 74-113 77-110 78-110 <br /> Analysis Name: EPA SW846/8260 (water-25ml) #1 <br /> Batch number: G093271AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <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 />