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QUALITY CONTROL REPORT <br /> Laboratory Control Sample <br /> Method 8015 - Modified <br /> LP: 9092 Batch #: 940422-0201 <br /> Date Of Analysis: 04/25/94 Spike Sample ID: LCSS 21 <br /> Column: DB-1 Spike ID Code: W5-115 <br /> Instrument #: PGC 6 Surrogate ID Code: NA <br /> Matrix:Soil Units:mg/Ke <br /> (a) (b) (c) (d) (e) (I) (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 /> Diesel 0 83.3 612 74 NA NA NA 52- M < 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 — ( Ic-el )/((c+e) x .5) x 100 <br /> MBT Environmental ""i 'faster Builders Tecnnoicc es <br /> Laboratories ��II�� <br /> (a9o92) <br />