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Client Number BNCOIARCOi <br /> Facility Number 2133 <br /> Arco Representative Chuck Carmel <br /> Work Order Number C3-02-3W <br /> QC Matrix Spike and Duplicate Spike Results <br /> Matrix Water <br /> Sample Date of Spike Recovery, Duplicate <br /> Analyte ID Analysis Amount Units % Recovery, % RPDa,9b <br /> Modified EPA 8020: <br /> Reagent <br /> Benzene Water 02/19/93 20 0 ug/L 900 906 055 <br /> Reagent <br /> Toluene Water 02/19/93 200 ug/L 940 910 32 <br /> Reagent <br /> Ethylbenzene Water 02/19/93 200 ug/L 900 870 34 <br /> Reagent <br /> Xylene,total Water 02/19/93 600 ug/L 908 910 022 <br /> Modified EPA 5020: <br /> Benzene C302311-03 02/19/93 200 ug/L 880 NA NA <br /> Toluene C302311-03 02/19/93 200 ug/L 875 NA NA <br /> Ethylbenzene C302311-03 02/19/93 200 ug/L 835 NA NA <br /> Xylene,total 0302311-03 02/19/93 600 ug/L 862 NA NA <br /> Metals: <br /> Cadmium 0302389-01 02/18/93 2500 ug/L 916 NA NA <br /> Chromium C302389-01 02/18/93 5000 ug/L 946 NA NA <br /> Copper C302389-01 02/18/93 5000 ug/L 952 NA NA <br /> Lead C302389-01 1 02/18/93 5000 ug/L 914 NA NA <br /> Nickel C302389-01 1 02/18/931 5000 1 ug/L 1 920 1 NA NA <br /> Zinc 0302389-01 02/18/931 5000 1 u L 1 914 1 NA NA <br /> a See attached table for acceptability limits <br /> NA- Not Applicable <br /> 0 MGTEL <br /> GTEL Concord,CA Page 2of3ENVIRONMENTAL <br /> OC - LASORATORIE6 INC. <br />