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Page -21- <br /> SPIKING OF SAMPLES FOR <br /> Wet Extraction Test/Extraction Procedure Toxicity <br /> Parameter Preparation Yield <br /> Antimony Add 0.5 mL of 1000 mg/L standard 2.5 mg/1, <br /> into 200 ml, of solution <br /> Arsenic Add 0.5 mL of 1000 mg/L standard 2.5 mg/L <br /> into 200 mL of solution <br /> Barium Add 0.5 mi, of 1000 mg/L standard 2.5 mg/L <br /> into 200 mL of solution <br /> Beryllium Add 0.1 mL of 1000 mg/L standard 0.5 mg/L <br /> into 200 mL of solution <br /> s <br /> Cadmium Add 0.2 mL of 1000 mg/L standard 1.0 mg/L <br /> into 200 mL of solution <br /> Chromium Add 1.0 mL of 100n mg/L standard 5.0 mg/L <br /> into 200 mL of solution <br /> Cobalt Add 0.5 mL of 1000 mg/L standard 2.5 mg/L <br /> into 200 mL of solution i <br />- F . <br /> Copper Add 0.5 mL of 1000 mg/L standard 2.5 mg/L <br /> into 200 mL of solution <br /> Lead Add 0.2 mL of 1000 mg/L standard 1.0 mg/L <br /> into 200 mL of solution <br /> a <br /> Mercury. Add 0.1 mL of 100 mg/'L standard 0.05 mg/L <br /> into 200 mL of solution <br /> 7 Molybdenum Add 1.0 mL of 1000 mg/L standard 5 mgil. i <br /> i into 200 mL of solution <br /> Nicl�.el Add 0.5 mL of 1000 mg/L standard 2.5 mg/L <br /> into 200 mL of solution <br /> Selenium Add 1.0 mL of 20 mg/L standard 0.1 mg/L <br /> } into 200 mL of solution <br /> Silver Add 0.2 mL of 1000 mg/L standard 1.0 mg/L <br /> into 200 mL of solution <br /> Thallium Add 0.5 mt of 1000 in /L standard 2.5 rag/L <br /> into 200 mL of. soluti•)n <br /> Vanadium Add 0.5 mL of 1000 mg/L standard 2.5 mg/L <br /> into 200 mL of solution <br /> i Zinc Add 2 mL of 1000 mg/L standard 10 mg/L <br /> into 200 mL of solution <br /> RECEIVED VAR � 3 1990 <br />