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QUALITY CONTROL REPORT <br /> Laboratory Control Sample/Laboratory Control Sample Duplicate <br /> Method 8015 - Modified <br /> LP# 7639 <br /> Analyst EB Batch # 930607-2003 <br /> Date Of Analysis' --06/19/93 Spike Sample p p ID LCSW LCSDW #57 <br /> Column DB-1 Spike ID Code W2-1593 W2-1565 <br /> Instrument # PGC #6 Surrogate ID Code NA <br /> Matrix Water Units mg/L <br /> (a) (b) (e) (d) (e} (t) (g) ACCEPTANCE <br /> SAMPLE + SAMPLE SPIKE LIMITS <br /> SAMPLE SPIKE SPIKE SPIKE DUP + DUP <br /> COMPOUNDS CONC CONC CONC REC % SPIKE CONC REC °la RPD % %REC RPD <br /> Gasoline0 2.50 1 35 54 145 58 7 26-90 < 25 <br /> Diesel 0 2,50 286 114 299 120 4 <br /> 43-152 a 25 <br /> Spike Recovery e d — ((c-a)/b) x 100 <br /> Spike Duplicate Recovery — f — ((e-a)/b) x 100 <br /> Relative Percent Difference — g — ( ic-eE )/((c+e) x 5) x 100 <br /> i <br /> MBT Environmental <br /> Laboratories <br /> (DC2-CN7639B) <br />