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QUALITY CONTROL REPORT <br /> Laboratory Control Sample <br /> Alethod 8020 <br /> LP# 11231 Spike Sample ID 0223-LCSW <br /> Date Of Analysis 02Z23/95 Spike ID Code W-1-1001 <br /> Column DB WAX Surrogate ID Code W-1-1039 <br /> Instrument # 6 Matrix Water Units ug/L <br /> (a) (b) (C) (d) (e) M (g) <br /> SAMPLE <br /> SAMPLE DUP ACCEPTANCE <br /> + + SPIKE LIMITS <br /> [6METHOD <br /> SAMPLE SPIKE SPIKE SPIKE SPIKE DUP <br /> COMPOUNDS CONC. CONC. CONC. REG% CONC- REG % RPD% %REG RPD <br /> Chlorobenzene 0 400 415 104 NA NA NA 69- 131 <20 <br /> Benzene 0 4 00 4 01 100 NA NA NA 72-134 C_2A <br /> Ethyl Benzene 0 400 4 34 108 NA NA NA 72-128 C20 <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) (k) El) <br /> SAMPLE <br /> SAMPLE DUP ACCEPTANCE <br /> SUR + + SUR DUP LIMITS <br /> EEPA SURROGATE SPIKE SUR SPIKE SUR REC. SUILSPIKE RECOVERY <br /> COMPOUNDS DET CONG CONC % CONG % %REG <br /> a,a a-Tnfluorotofuene PID 400 4-52 1I3 NA NA 63-134 <br /> Surrogate $ Recovery — j — (i/h) x 100 <br /> Surrogate Dup $ Recovery — 1 — (k/h) x 100 <br /> MBT Environmental ff i <br /> Laboratories �� ��� <br /> (CN11231) <br />