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QUALITY CONTROL REPORT <br /> Laboratory Control Sample/Laboratory Control Sample Duplicate <br /> Method 8015 - Modified <br /> LP# 6799 <br /> Analyst EB Batch # 921105-0304 <br /> Date Of Analysis 11/09L92 Spike Sample ID LCSW/LCSDW #44 <br /> Column DB-1 Spike ID Code W2-1144. W2-1325 <br /> Instrument # PGC#4 Surrogate ID Code NA <br /> Matrix Water Units rn L <br /> (a) (b) (c) (d) (e) (f) (g) ACCEPTANCE <br /> LIMPTS <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 25 19 76 19 76 0 26-902' <br /> 6-90 25 <br /> Diesel 0 25 21 84 21 84 0 43- 152+:5 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 />' <br /> T <br /> s� en Sm <br /> LCi=■ V <br /> ENVIRONMENTAL ENGINEERING CORPORATION (DC 5-CN6 7 99) <br /> bCychd pepef <br />