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QUALITY CONTROL REPORT <br /> Laboratory Control Sample/Laboratory Control Sample Duplicate <br /> Method 8015 - Modified <br /> Total Petroleum Hydrocarbons <br /> LP#: 6440 <br /> Analyst: CF Batch #: 920831-2002 <br /> Date Of Analysis: 09/03/92 Spike Sample ID: LCSS/LCSDS 9 <br /> Column: DB-1 Spike ID Code: W2-1145/W2-1215 <br /> Instrument #: PGC #4 Surrogate ID Code: NA <br /> Matrix:Soil Units:mg/Kg <br /> (a) (b) (c) (d) (e) (f) (g) ACCEPTANCE <br /> LIMITS <br /> SAMPLE + SAMPLE SPIKE <br /> SAMPLE SPIKE SPIKE SPIKE DUP. + DUP. <br /> COMPOUNDS CONC. CONC. CONC. REC.% SPIKE CONC. REC.% RPD % REC. RPD <br /> Gasoline 0 83. 59. 71 57. 69 3 40-84 <25 <br /> Diesel 0 83. 75. 90 77. 93 3 50-121 <25 <br /> Spike Recovery — d — ((c-a)/b) x 100 <br /> Spike Duplicate Recovery — f — ((e-a)/b) x 100 <br /> Relative Percent Difference — g a ( ic-el )/((c+e) x .5) x 100 <br /> Agafrpern,LaTM <br /> (DC5-CN6440) �4 <br />