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' CHEMWEST ANALYTICAL LABORATORIES <br /> BENZENE, TOLUENE, ETHYL BENZENE, XYLENES <br /> CW:CALUFT <br /> Quality Control <br /> I' Client ID: LQCS GC-5 S508 CHEMWEST ID: 9790-QCI <br /> Date Analyzed: 07/14/92 Matrix : Soil <br /> Spike % % <br /> Conc. Recovery Recovery <br /> Compound (mg/Kg) 9790-MBS 9790-MBSD RPD <br />' ------------------------ - -------- <br /> Benzene 0 . 50 102% 300% 2% <br /> Toluene 0. 50 94% 90$ <br /> Ethylbenzene 0. 50 92% 88% 4% <br /> p--Xylene 0. 25 92% 86% 7% <br /> m-Xylene 0 . 25 94% 90% 4% <br /> o-Xylene 0 . 50 94% 90% 4% <br /> Total-Xylenes193% <br /> ' -------------------- --------------------------------- <br /> Spike % % <br /> Conc. Recovery Recovery <br /> Surrogate (mg/Kg) 9790-MBS 9790-MBSD <br /> --------------- --------- ------------ <br /> Bromofluorobenzene 20 95- 95- <br /> --------------------------__-__-------_-- <br /> CALUFT: See Narrative <br /> 1 <br /> �I <br /> ,,,c, Date Reported: <br /> Approved by: 07/17/92 REV 5: 1.90 <br /> ,1 <br /> COMPUCIIFM WFSTFRN DR/1SION <br /> 1 <br />