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,d&Lancaster <br /> Laboratories - - - Analysis=Reporf�"�� <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 176052425•717-656-2300 Fax 717-656 2681 WWW IancasterIAUS com <br /> Page 1 of 2 <br />( <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 916043 <br /> Reported 10/26/04 at 12 24 AM <br /> Matrix QC may not be reported if site-specific QC samples were not <br /> Submitted In these situations,to demonstrate precision and accuracy at <br /> a batch level,a LCS/LCSD was performed,unless otherwise specified in the <br /> method <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Units %RBC %REC Limits RPD RPD Max <br /> Batch number 04287A56A Sample number(s) 4376303,4376305-4376307,4376309 <br /> TPH-GRO - Waters N D 50 ug/1 119 120 70-130 1 30 <br /> Batch number 0429SA56A Sample number(s) 4376304,4376308 <br /> TPH-GRO - Waters N D 50 ug/1 120 113 70-130 6 30 <br /> Batch number Z042952AA Sample numbers) 4376303-4376309 <br /> Methyl Tertiary Butyl Ether N D 2 ug/1 91 77-127 <br /> Benzene N D 5 ug/1 94 85-117 <br /> Toluene N D 5 ug/1 98 85-115 <br /> Ethylbenzene N D 5 ug/1 99 82-119 • <br /> Xylene (Total) N D 5 ug/l 96 83-113 <br /> Sample Matrix Quality Control <br /> MS _MSD MS/MSD____=RPD_ -�=_ <br /> =BBGDIIP—--_DIIP <br />-- Analysis-Name= =—-- %REC_j EC Limi _ Dux-RPD = <br /> >is � �4A Cone Conc RPD Max <br /> Batch number 04295A56A Sample number(s)_ 4376304,43_76308___- <br />- - - - TPH=GRO - Waters-- -- --_r <br /> —- -- - <br /> Batch number Z042952AA Sample_numberis) 4376303-4376309 - <br /> Meth'yl Tertiary Butyl Ether 94 94 69-134 0 30 ~f <br /> Benzene 97 98 83-128 1 30 <br /> Toluene 104 103 83-127 0 30 <br /> Ethylbenzene 102 103 82-129 1 30 <br /> Xylene (Total) 101 102 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 04287A56A <br /> Trifluorotoluene-F <br /> 4376303 104 <br /> 4376305 104 <br /> 4376306 105 <br /> 4376307 104 <br /> 4376309 110 <br /> *-Outside of specification <br /> (l) 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 fs � <br />