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ENVIRONMENTAL <br /> - CHEMICAL ANALYSIS = LABORATORIES, INC. <br /> PETROLEUM oo J.J.EGLIN,REG.CHEM.ENGR. <br /> 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 <br /> BTX/TPH GASOLINE <br /> Quality Control Data <br /> Water Work Spike ID: 8283-5 <br /> 1710 Main St Analysis Date: 24-Oct-89 <br /> Escalon, CA 95320 Sample Matrix: Soil <br /> Attention: Robert Juncal Units: ug/g <br /> j Quality Control <br /> for Lab Nos: 8283-2, 8283-3, 8283-4, 8283-5, 8283-6, 8283-7 <br /> �- Onele in <br /> samp 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. I <br /> [ Conc. Conc. alp <br /> in Spike Added to Spike Spike Spike <br /> Constituentle Spike % Rec % Rec RPD <br /> ----------------------�----------------o------------------------- <br /> Benzene 0.00 5.02 84.20 85.94 2.05 <br /> Toluene 0.00 5.16 89.98 91.52 1.70 j <br /> Ethyl Benzene 0.00 5.01 95.56 96.41 0.89 <br /> p-Xylene 0.00 5.06 94.86 95.37 <br /> 0.54 <br /> t = m-Xylene 0.00 5.01 99.34 99.60 0.26 <br /> 1_ <br /> I <br /> o-Xylene 0.00 5.00 96.63 97.58 0.98 ! <br /> i <br /> TPH Gas 0.00 301.06 92.46 85.81 7.46 <br /> i <br /> S QC Comments: <br /> I <br /> I <br /> Spiked Sample Concentration - Sample Concentration <br /> % Recovery = -------------------------------------------------- X 100 <br /> (Concentration of Spike) <br /> i <br /> RPD (Relative Percent Difference) _ <br /> Spiked Sample Conc. - Spiked Duplicate Sample Conc. <br /> ----------------------------------------------------- X 100 { <br /> (Average Conc. of Spikes) <br />