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F <br /> ENVIRONMENTAL <br /> CHEMICAL ANALYSIS LABORATORIES, INC. <br /> PETROLEUM J J EGLIN REG CHEM ENGR <br /> 4100 PIERCE RD , BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 <br /> BTX/TPH DIESEL <br /> (Water) <br /> Quality Control Data <br /> Water Work BTX Spike ID Water <br /> 1710 Main St TPH Spike ID Water <br /> Escalon, CA 95320 Analysis Date 06-Feb-90 <br /> Attention. Eric Taylor Sample Matrix Water <br /> Units ug/ <br /> Quality Control <br /> for Lab Nos 914-1 <br /> One sample in twenty is selected as a representative matrix which is <br /> spiked The percentage recovery (% Rec) of the spike is a relative <br /> measure of the accuracy of the analysis The comparison of the spike <br /> with a duplicate spike is a measure of the relative precision of the <br /> analysis <br /> Dup <br /> Spike Spike Spike <br /> Constituent % Rec % Rec RPD <br /> -------------------------------------------------------------------- <br /> Benzene 80 58 72.31 10.82 <br /> Toluene 75 00 66 47 12 06 <br /> Ethyl Benzene 88 87 79.10 11 63 <br /> TPH Diesel 77.80 42.00 59 77 <br /> QC Comments- <br />