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3.0 TOXICITY TESTING OF TANK CONTENTS <br /> In order to continue using the sump tank as an underground storage tank, IT <br /> engineers recommended that upon cleaning, the tank no longer be used to <br /> receive the discharge of motor oils. This condition was adopted by Carnation <br /> personnel . Proving the contents non-hazardous would eliminate the requirement <br /> for registration and monitoring. <br /> To prove the non-hazardous nature of the wash water the following action was <br /> taken: <br /> A survey of chemical and cleaning materials used in the warehouse was <br /> performed by Carnation personnel . Material Safety Data Sheets for the <br /> chemical materials in the warehouse were provided by the client, and are <br /> presented in Appendix II. The hazardous nature of some of the cleaning <br /> materials was questionable so a representative sample of the water phase was <br /> drawn from the tank by an IT engineer. The sample was sent out for chemical <br /> analysis and bioassay toxicity testing. The results in Appendix III indicate <br /> that the water phase is not toxic, even at levels greater than specified by <br /> the regulations. This allows for the delisting of the tank contents and <br /> continued use of the tank provided that no oil of any type or any other <br /> hazardous materials are placed in the tank and the other conditions of the <br /> regulations are met. Any new chemical materials brought into the warehouse <br /> should be reviewed as to their toxicity and potential for finding their way <br /> into the tank. The regulatory issues that pertain to the tank are reviewed in <br /> the discussion section. <br /> 3 <br /> ENG:0551/02246 <br />