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QUALITY CONTROL REPORT <br /> Laboratory Control Sample/Laboratory Control Sample Duplicate <br /> Method 8015 - Modified <br /> LP# 6743 <br /> Analyst EB Batch # 921105-0303 <br /> Date Of Analysis _ 11/09/92 Spike Sample ID LCSS/LCSDS #27 <br /> iColumn DB1 Spike ID Code W2-1325 W2-1144 <br /> Instrument # PGC#6 Surrogate ID Code NA <br /> Matrix Soil Units mm/Kp� <br /> (a) (b) (c) (d) (e) {t) (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 /> %o <br /> Gasoline 0 83 60 72 1 63 76 5 40-84 < 25 <br /> Diesel 0 83 85 102 88 1; 3 50-121 C 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 /> A9afFenLaSm <br /> ENVIRONMENTAL ENGINEERING CORPORATION roc)c4a paper <br />