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i <br /> 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 /> Cone. Cone, Cone. % Rec. Cone. % 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 /> ND = Not Detected above Limit of Detection <br /> MS = Matrix Spike MSD = Matrix Spike Duplicate <br /> i <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 MSO <br /> [% Rec MS + Rec, MSD) x 100% <br /> 2 <br />