DUSTAC APPLICATION INSTRUCTIONS A stepbystep look at application

DUSTAC APPLICATION INSTRUCTIONS A step-by-step look at application rates for construction areas

• • The Use of Polymers The use of polymer based dust suppression is recognised as the most effective form of dust control A polymer is a large molecule composed of repeating structural units Although the term polymer is sometimes taken to refer to plastics, it actually encompasses a large class of natural and synthetic materials Both synthetic and natural polymers are used in road stabilisation This applies to haul roads and other trafficable surfaces. The benefits of these type of products include reduced water application more stable road surfaces and a long term sustainable management program. Dustac is a natural polymer

DAY 1 First application – 2. 5% Dustac solution. • 250 L of Dustac in a 10, 000 litre water tank of water. • Fill water truck to 75% level, pump in 250 L of Dustac and then top up water truck to full level. • This will facilitate the mixing of the product and at the same time limit foaming • Spray evenly over all construction areas using center spray head only • The minimum application rate is 1 litre of solution per m 2

DAY 2 Second application – 1. 25% Dustac solution. • 125 L of Dustac in a 10, 000 litre water tank of water. • Fill water truck to 75% capacity, pump in 125 L of Dustac and then top up water truck to full level. • The minimum application rate is 1 litre of solution per m 2 • If the surface has been allowed dry out pre-water to match up moisture horizons • Spray evenly over all construction areas using center spray head only.

DAY 3 Third application – 1. 25% Dustac solution. • 125 L of Dustac in a 10, 000 litre water tank of water. • Fill water truck to 75% capacity, pump in 125 L of Dustac and then top up water truck to full level. • The minimum application rate is 1 litre of solution per m 2 • If the surface has been allowed dry out pre-water to match up moisture horizons • Spray evenly over all construction areas using center spray head only.

DAY 4 Spray water only when required. • • • Dustac treated areas will require less water than untreated areas to control dust generation Depending on road base water savings can be expected to be up to 80% Overwatering will dilute Dustac concentrations at the top of the road base profile. Should the amount of water needed to settle dust increase reapply Dustac as described in Day 3 protocol above After torrential rain it may be necessary to reapply the protocol from Day 1 above