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MOM- W <br /> e, IN <br /> mu <br /> Efflml-al- 1_. <br /> w <br /> VAMNMINTAL <br /> CffYACU ANAtY515 LABORATORIES, INC. <br /> � <br /> J.J.EOL.IN,AEG.CHEet.ClIGR. <br /> PETROLEWUN <br /> 4100 PfE'tCE RD., E3AKERSFIELD,CALIFORNIA 83909 PHONE327-4911 <br /> BTX/TPH GASOLINE <br /> Quality Control Data <br /> Dares and Moore Spike ID: 7635-4 <br /> 9300 Tech Center Dr. Ste. 100 Analysis Date: 30-Sep-89 <br /> Sacramento, CA 95828 Sample Matrix: Soil <br /> Attenticn: Mare Balch Units: ug/g <br /> Quality Control <br /> for Lab Nos: 7622-25 <br /> One sample in twenty is selected as a represerit:stive 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 /> -: <br /> Conc. Conc. Dup <br /> in Spike Added to Spike Spike Spike <br /> Constituent Sample Spike NEC ao Ret RPD <br /> iN ------------------------------------------------------------------ <br /> Benzene 0.00 5.01 100.32 99.88 0.44 <br /> Toluene 0.00 5.03 104.76 104.69 0.07 <br /> Et1W1 Benzene 0.00 5.09 98.42 95.60 0.85 <br /> p-X,viene 0.00 5.02 99.49 98.62 0.88 <br /> m--Xylene 0.00 5.11 102.60 101.80 0.78 <br /> o-Xylene 0.00 5.03 102.58 102.29 0.28 <br /> -- TPH Gas 0.00 301.06 91.37 89.19 2.41 <br /> QC Comments: <br /> Spiked Sample Concentration - Sample Concentration <br /> % Recovery = -------------------------------------------------- X 100 <br /> (Concentration of Spike) <br /> RPD (Relative Percent Difference) - <br /> Spiked Sample Conc. - Spiked Duplicate Sample Conc. <br /> ,•------•--------- X 100 <br /> ------------(Average Conc. of Spikes) <br />