Irving Pulp and Paper Ltd. is looking for approval of a $1.1 billion upgrade to its west side pulp mill. The project includes a new 20-storey boiler building to be constructed within four years. The goal is to upgrade the current 1970s boiler to increase pulp output by 65 per cent and generate enough energy to operate without buying off-plant power, said Mark Mosher, vice-president of Irving Pulp and Paper. Mosher said the mill has been getting gradual upgrades for years, including a 1990s upgrade to reduce odour and emissions. He said this new equipment is expected to reduce odour and emissions for each tonne produced. …The increased output would mean two trains out of the pulp mill a day, instead of one, and more incoming wood chips. …The company has filed its environmental impact assessment report and is awaiting approval.