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Page 6 of 11 <br /> CLAYTON ENVIRONMENTAL CONSULTANTS, INC. <br /> EPA METHOD 8010 <br /> Purgeable Halocarbons <br /> MATRIX SPIKE/MATRIX SPIKE DUPLICATE RECOVERY <br /> File Name: 8812124-23 Date Analyzed: 01/06/89 <br /> Spike: -23 Spike Matrix: Soil <br /> Duplicate Spike: -23 Spike Duplicate Units: mg/kg <br /> Sample I.D. : Tank-6-D-9. 7 ' <br /> Conc, Conc. Conc, % Rec. Conc, % Rec, <br /> Compound Fraction Sample Spiked MS MS MSD MSD RPD <br /> Ethylene Glycol VOA 0 25 21.8 87 15. 2 61 35 <br /> pND = Not Detected above Limit of Detection <br /> L S = Matrix Spike MSD = Matrix Spike Duplicate <br /> % Recovery - Con. MS - Conc Sample <br /> Conc. Spike x 100 <br /> Con. MS = Compound Concentration found in Matrix Spike sample <br /> Conc. Spiked = Compound Concentration spiked amount in Matrix Spike sample <br /> Conc. Sample = Compound Concentration found in sample <br /> RPD = Relative Percent Difference = % Rec. MS - % Rec. MSD <br /> [% Rec. MS + Rec. MSD] x 100% <br /> 2 <br />