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Pace Analytical Services, Inc <br /> 900 Gemini Avenue <br /> , TX 77058 <br /> ace Analytical ,� Phone Houston <br /> WWW pacelohs cam Fax 281488 4661 <br /> F� F <br /> l <br /> 1 <br /> Lab Project Number 8524970 <br /> Client Project ID BP Site# 11191/852 1709 4 <br /> J I <br /> r! <br /> QUALITY CONTROL DATX PARAMETER FOOTNOTES <br /> Consistent with EPA guidelines unrounded concentrations are displayed and have been used to calculate % Rec and RPD values <br /> LCS(D)Laboratory Control Sample (Duplicate) <br /> MS(D)Mat�rix Spike (Duplicate) <br /> DUP(' Sample Duplicate <br /> ,,,ND-' Not detected at or above adjusted reporting limit <br /> / -NC Not Calculable <br /> j J Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit <br /> RPD Relative Percent Difference <br /> X, (S) Surrogate <br /> [17 High surrogate recovery was confirmed as a matrix effect by a second analysis <br /> [21 RPD for this analyte exceeded QC limits However the spike recovery in both the LCS and LCSD met QC criteria <br /> Therefore no further action was taken (SW 8260) <br /> [31 Due to matrix interference the matrix spike and/or matrix spike duplicate do not provide reliable X Recovery and <br /> RPD values Sample results for this QC batch accepted based on LCS and/or LCSD % Recovery and/or RPD values <br /> I <br /> Date 12/28/01 Page 10 <br /> REPORT OF LABORATORY ANALYSIS <br /> This report shall not be reproduced,except in full, <br /> without the written consent of Pace Analytical Services, Inc <br /> x Ace,, <br /> s <br />