g 1 appendix ontario toxic emissions inventory background the province of canada has prepared an air on target substances for great lakes regional project 1999 calendar year this includes point and area sources only in order to prepare followed protocol emission source methodologies agreed upon by s technical steering committee developing where applicable related information was collected from domestic regulatory voluntary inventories as well statistical organizations such statistics these were deposited into pollution development system rapids version 2 compiled using its reference tables factors us epa factor retrieval fire 6 23 specific profiles mercury part effort improve estimates identified major categories updated various based recent industry test results a