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i <br /> a <br /> Lancastern aI sis Report <br /> i . Laboratories Y R <br /> 2425 New Holland Pike PO Box 12425 Lance.,., PA 17605.2425•717 655-2300 Fax 717-656"2691'W WW lanC6StBrtabS COrn <br /> Page 2 of 3 <br /> Quality Control Summary <br /> iClient Name Chevron Group Number 986657 <br /> Reported 05/09/06 at 03 50 PM <br /> Sample Matrix Quality Control <br /> i Unspiked (UNSPK) = the sample used in con3unction with the matrix spike <br /> Background (EKG) - the sample used in con3unction with the duplicate ,l <br /> Ms MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> AnalVass Naupe <br /> $RBC %RBC Limito 8� MA% Conc Conc RPD Max <br /> i Batch number W062161AA Sample number(S) 4756303-4756314 UNSPK P756183 <br /> Methyl Tertiary Butyl Ether 94 93 69-127 1 30 <br /> Benzene 108 107 93-128 1 30 <br /> Tricbloroethene 112 110 83-136 1 30 <br /> Toluene IID 106 83-127 4 30 <br /> Tetrachloroethene 104 100 78-133 3 30 <br /> i Ethylbenaene 106 103 82-129 3 30 <br /> Xylene (Total) 107 104 82-130 3 30 <br /> i Surrogate Quality Control. <br /> Surrogate recoveries which are outside of the QC window are confirmed <br /> unless attributed to dilution or otherwise noted on the Analysis Report <br /> i Analysis tiara TBH by GC-PID (Waters) <br /> Batch number 061140018A Ortbote hen 1 <br /> Chlnrobenxene � y <br /> 4756303 69 94 <br /> 4756304 a5 96 <br /> i 4756305 70 92 <br /> 4756306 56 76 <br /> 4756307 72 88 <br /> 4756308 '74 90 <br /> 4756309 69 85 <br /> 4756310 67 84 <br /> i 4756311 72 93 <br /> 4756312 68 82 <br /> 4756313 70 85 <br /> 4756314 71 89 <br /> Blank 64 90 <br /> i LCS 65 93 <br /> LCSD 66 97 <br /> Limits 26-135 44-137 <br /> i Analysis Name TPR-GRO - Waters <br /> Batch number 0611SA54A <br /> Trifluorotoluene-F <br /> 4756302 98 <br /> Blank 98 <br /> i LC$ 102 <br /> LcsD loz <br /> MS 104 <br /> Limitt 63-135 <br /> i Analysis Name BTF.X4MTB6 by 8260B <br /> Batch number P061162AA <br /> *-Outside of specification <br /> i (]) The retiutt for ane or Moth doemmnations was less than fn e tnnee the LOQ <br /> (2) The background reSu4t was more than four times the spike added <br /> • <br /> i <br /> i <br />