Chapter 33 - Port Zone is a Permitted Activity provided that: a) There is no objectionable odour at or beyond the property boundary; b) There is no objectionable deposition of dust at or beyond the property boundary; and c) There is no offensive, adverse, or objectionable health effects beyond the property boundary. 33.1.6.1.7 General Rules Relating to Dust Emissions 33.1.6.1.7.1 Any person undertaking an activity resulting in the emission of dust shall adopt the best practicable option to avoid, remedy or mitigate adverse effects resulting from the dust emissions on the receiving environment. 33.1.6.1.7.2 The discharge of non-toxic dusts from any process vent or stack is a Permitted Activity subject to the following conditions: a) Any air pollution control equipment and dust collection system shall be designed to achieve a particulate discharge rate of 125mg/ m(corrected 3 to 0 degrees Celsius, 1 atmosphere pressure, dry gas basis) and at no time shall emissions exceed 250mg/ m (corrected to 0 degrees Celsius, 3 1 atmosphere pressure, dry gas basis); b) No particles in the emission shall be larger than 0.5 millimetres in diameter. 33.1.6.1.7.3 Notwithstanding the above, there shall be no visible emission of dust from any process vent or stack (note that ‘dust’ refers to solid particulate and does not include emissions of vapour or droplets); and 33.1.6.1.7.4 The discharge of non-toxic dust from any process vent or stack shall not result in deposition of solid material on property owned or occupied by persons other than those who carry out the activity. 33.1.6.2 Abrasive Blasting Operations 33.1.6.2.1 Non Mobile Source The discharge of contaminant into air from abrasive blasting, other than from a mobile source, is a Permitted Activity provided the following conditions are met: 33.1.6.2.1.1 Conditions a) The surface to be blasted shall not contain any lead, zinc, arsenic, chromium, cadmium, copper, mercury, tributyl tin or thorium-based compounds; b) When using dry abrasive blasting techniques, all items shall be blasted within an abrasive blasting enclosure, and air extracted from the enclosure shall be filtered so that there is no visible discharge of dust; c) When using wet abrasive blasting techniques, there shall be no discharge of water spray beyond the boundary of the subject property; d) The discharge shall not raise the ambient dust deposition rate by more than 4g/ m per 30 days at any point beyond the boundary of the subject 2 property; and e) Sand or any other material used for abrasive blasting shall contain not more than 5% free silica on a dry weight basis, and shall not be reused. 33 - 11