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CHEMWEST ANALYTICAL LABORATORIES <br /> Arsenic <br /> Date (S) Analyzed: 04-26-90 Case 5886 <br /> thru: 05-09-90 Matrix : Water <br /> Amount <br /> Client CHEMWEST Detected <br /> ID ID (mg/L) <br /> ------------------------------------------------------------------ <br /> 38899 5886-1 4 . 4 <br /> 38900 5886-2 1.7 <br /> 38901 5886-3 30 <br /> 38902 5886-4 2. 5 <br /> 38903 5886-5 1. 4 <br /> 38904 5886-6 BRL <br /> 38905 5886-7 BRL <br /> 38906 5886-8 BRL <br /> 38907 5886-9 BRL <br /> ------------------------------------------------------------------ <br /> The reporting limit for Arsenic is 0 . 2 mg/l. <br /> Spike Amount <br /> Client CHEMWEST Conc. 8 Detected <br /> ID ID (mg/L) Rec . (mg/L) <br /> ------------------------------------------------------------------ <br /> 388906 5886-8DUP BRL <br /> 388906 5886-SMS 2. 0 1113% <br /> 388906 5886-814SD 2.0 1098 <br /> Method Blank 5886-MB BRL <br /> Method Blank Spike 5886-MBS 1.0 1018 <br /> Method Blk Dup 5886-MBSD 1.0 102% <br /> ------------------------------------------------------------------ <br /> Relative 8 Difference for MS/MSD = 1% <br /> Relative 8 Difference for *SBS/MBSD = 18 <br /> Approved by: Ai- REV4 :1 . 90 <br /> CHENAvEE NAtY7CAL LABORATORIES,INC. <br />