Remove the sixth and seventh paragraphs:Rooms where chemicals are mixed and disposed should be isolated andinclude sinks and/or drains in appropriate locations to ensure thesechemicals are properly disposed of and not dumped into inadequatespaces (e.g., restrooms); local codes requiring separate drain lines areto be followed.Special consideration should be given to the design and installation ofcontainment drains to ensure that hazardous waste is properly disposedand to prevent environmental damage or contamination of watersystems.