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ENVIRONMENTAL <br /> CHEMICAL ANALYSIS LABORATORIES, INC. <br /> J.J.EGL1N,REG.CHEM.ENGR. <br /> PETROLEUM <br /> 4100 PIERCE RD., BAKERSFIELD,CALIFORNIA 93308 PHONE 327.491' <br /> 11'PH-Paint Thinner <br /> Quality Control Data <br /> Water Work Spike 1D: 9177-1 <br /> 1710 Main St Analysis Dat,6: 2S•-Nov-89 <br /> Escalon, CA 95320 Sample Matrix: Soil <br /> Attention: Robert Juncal units-, ug/g <br /> r.� Quality Control <br /> for Lab Nos: 9177-3 <br /> One sample in twenty is selected as a representative matrix which is <br /> Spiked .. "'he percentage recovery (o Rec) of the spike is a relative <br /> measure-f�f the accuracy of the analysis. The comparison of the spike <br /> with a duplicate spike is a measure of the relative precision of tri: <br /> analysis: <br /> Conc. Conc. Dup <br /> in Spike Added to Spike Spike Spike <br /> .} Constituent Sample Spike Rec % Rec RPD <br /> - ------------------------ ---------------------------------------- <br /> i TPH for <br /> Paint Thinner 0.00 301.06 93.17 84.82 9.38 <br /> QC Comments: <br /> Spiked Sample Concentration - Sample Concentration <br /> o recovery - ----------- --- -------------- <br /> -- ----------- . X 100 <br /> {.,. (Concentration of Spike) <br /> RPD (Relative Percent Difference) .- <br /> t Spiked Sample Conc. - Spiked Duplicate Sample Conc. <br /> ------------------------------=- X 100 <br /> ------ . (Average Conc. of Spikes) <br />