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ME <br /> � • j7V17A0M@1 Yf11 <br /> prfrrUl�aalrSrS LA B O RA T O R ES, INC. <br /> '"" /f1AQ1fUY J J EGUN n1G CAEU tNOR <br /> 4100 PIERCE RD., BAKERSFIELD,CALIFORNIA 93300 PHCNE 327.4911 <br /> Bn/M1 GASOLINE <br /> Qiality Control Data <br /> Water Work Spike ID: 9419-2 <br /> ;.t 1710 Main St Analysis Date: 29-Huv-89 <br /> Fscalon, CA 95320 Sample Matrix: Soil <br /> ". Attention: Units: ug/g i <br /> Quality Control ` <br /> i <br /> for Lab Hos: 9302-1 <br /> i <br /> One sample in twenty is selected as a representative matrix uhi ch is <br /> spiked. The percentage recovery (%6 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 /> r.4n ysis. <br /> Conc. Conc, Dap <br /> in Spike Added to Spike Spike Spike <br /> �= Constituent Sample Spike % Rec % Rec RFD <br /> Benzene 0.00 5.02 106.72 104.12 2.47 <br /> 17 Toluene 0.00 5.16 102.79 100.28 2.47 <br /> Ethyl Benzene 0.00 5.01 106.97 104.20 2.62 <br /> p-Xylene 0.00 5.06 105.04 102.54 2.47 <br /> m-Xyiene O.OD 5.01 109.47 106.70 2.56 <br /> 4 o-Xylene 0.00 5.00 108.97 106.45 2.34 <br /> TFH Gas 0.00 301.06 85.27 87.04 2.05 <br /> s <br /> QC Camflents: <br /> Spiked Stemple Concentration - Sample Concentration <br /> LJX Recovery. = ----------------------------------------------------- X 100 <br /> ' (Concentration of Spike) <br /> RFD (Relative Percent Difference) _ <br /> i Spiked Sample Conc. Spiked Duplicate Sample Conc. p <br /> ------------------------------------ x 100 <br /> (Average Conc. of Spikes) <br />