Optimised Operations has completed several air emissions inventories for the New South Wales Environment Protection Authority, including:

• Off-Road Mobile Inventory (2006)
• Domestic/Commercial Inventory (2006)
• Styrene Emissions Inventory (2000)
• Aggregate Air Emissions Inventory Update (2000)
• Aggregate Air Emissions Inventory (1999)

The purpose of these inventories were to generate data for the National Pollution Inventory (NPI), to develop information on air emissions in the metropolitan areas of Sydney, Wollongong and Newcastle for use in setting environmental policy in NSW and to improve data quality on air emissions in the state.