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QUALITY CONTROL REPORT <br /> Laboratory Control Sample/Laboratory Control Sample Duplicate <br /> Method 8020 LP# 7639 <br /> Analyst MH Spike Sample ID LCS LCSDW - 44 <br /> Date Of Analysis 06/03/93 Spike ID Code W-1-733 <br /> Column DB 1 Surrogate ID Code W-1-740 <br /> Instrument # 4 Matrix Water Units ug/ <br /> (a) (b) (e) (a) (e) (0 (8) <br /> rSAMPLE <br /> SAMPLE DUP ACCEPTANCE <br /> + + SPIN LIMITS <br /> EPA SAMPLE SPIKE SPIKE SPIKE SPIKE DUP <br /> MEMOD COMPOUNDS CONC CONC CONC REC.% CONC REC % RPD% %REC RPD <br /> 8020 Chlorobeazene 0 400 426 106 429 107 1 80- 120 <20 <br /> 8020 Benzene 0 400 420 105 419 105 0 80-120 c20 <br /> :::8020 Ethyl Benzene 0 400 417 104 414 104 1 80-120 G20 <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 /> (h) (4 {I) (k) (I) <br /> SAMPLE <br /> SAMPLE DUP ACCEPTANCE <br /> SUR + + SUR DUP LIMITS <br /> EPA SURROGATE SPIKE SUR SPIKE SUI- REC SUR-SPIKE RECOVERY <br /> METHOD COMPOUNDS DET CONC CONC % CONC % %vREC <br /> 8020 a,a^-Trifluorotoluene PID 400 389 97 3 41 85 80- 120 <br /> Surrogate % Recovery — j — (i/h) x 100 <br /> Surrogate Dup % Recovery — 1 — (k/h) x 100 <br /> MBT Environmental _> <br /> Laboratories <br /> (DC2-CN7639B) <br /> �a <br />