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i <br /> 3.0 TOXICITY TESTING OF TANOCONTENTS <br /> i <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 condit'jon was adopted by Carnation <br /> i <br /> personnel . Proving the contents non-hazardous wou4d eliminate the requirement <br /> for registration and monitoring. j <br /> :1 <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 { <br /> personnel . Material Safety Data Sheets for the ; <br /> chemical materials in the warehouse were provid- d 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 /> i <br /> analysis and bioassay toxicity testing. The results in Appendix III indicate <br /> that the water phase is not toxic, even at 1 evel s greater than specified by <br /> the regulations. This allows for the delistingi� 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 `} <br /> g y .issues that pertain to the tank are reviewed in , <br /> the discussion section. <br /> jJ <br /> if <br /> it <br /> i <br /> it Y <br /> 3 <br />=NG:0551/02246 <br />