stone clay glass and concrete products industry sector notebook project iv chemical release transfer profile this section is designed to provide background information on the pollutant releases that are reported by best source of comparative toxic inventory system tri pursuant emergency planning community right know act includes self facility data for over 600 chemicals facilities within sic codes 20 39 manufacturing industries have more than 10 employees above weight based reporting thresholds required report site off transfers presented notebooks derived from most recently available 1993 year which then included 316 focuses primarily each because requires consistent regardless it an excellent tool drawing comparisons across although does not present historical regarding time please note in general been declining fact according book dropped
