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1 <br /> LancasterAnalysis Report � <br /> Laboratories Y <br /> 2425 New Holland Pike PO Bout 12425 Lancaster PA 176052425•717 6562300 Fax 717 656.2681•www lar► 7,07abs com ' <br /> Page 2 of 3 <br /> Quality-Control Summary <br /> Client Mame Chevron Group Number 998443 ' <br /> Reported 08/01/06 at 10 57 AM <br /> Sample Matrix Quality Control <br /> Unspiked (UNSPK} - the sample used in conjunction with the matrix spike <br /> Background (BKG) = the sample used in con3unction with the duplicate ' <br /> HS NSD MS/MSD RPD BKG DUP DDP Dup RFD <br /> Analvais.Name %RHC %REC Limits RPD MAX Conc cont RPD MAX <br /> Ethylbenzene 92 48 82-129 4 30 <br /> Xylene (Total) 96 93 82-130 2 30 ' <br /> Batch number W062061AA Sample number(s) 4821621-4821633 UNSPK 4821631 <br /> Methyl Tertiary Butyl Ether 99 101 69-127 2 30 <br /> Benzene 107 108 83-128 1 30 <br /> Trichloroethene 107 108 83-136 1 30 <br /> Toluene 104 106 83-127 2 30 <br /> Tetrachlorcethene 106 105 78-133 1 30 <br /> Ethylbernzene 105 308 82-129 3 30 <br /> Xylene (Total) 109 111 82-130 2 30 <br /> Batch number W062061AB Sample numberls) 4821624 4821627 UNSPK P821631 <br /> Tetrachloroethene 106 105 78-133 1 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 TPH by GC-FID (Waters) <br /> Batch number 062050022A I <br /> Chlorobenzene Orthoterphenyl <br /> 4821621 85 85 <br /> 4821622 87 87 <br /> 4821623 80 es <br /> 4821624 75 87 I <br /> 4821625 93 91 <br /> 4821626 87 86 <br /> 4821627 84 87 <br /> 4821628 76 84 <br /> 4821629 79 84 <br /> 4821630 90 90 <br /> 4821631 97 93 <br /> 4821632 75 86 <br /> 4821633 78 82 <br /> Blank 78 87 <br /> LCS 81 98 ' <br /> LCSD 81 98 <br /> Limits 26-136 44-137- <br /> Analysis Name TPR-GRO - Waters <br /> Batch number 0620OA54A I <br /> Trifluorotoluene-F <br /> 482162❑ 90 <br /> Blank 92 <br /> LCS 94 <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 /> • <br />