prepared for department planning & infrastructure wa basix triple bottom line cost benefit analysis report no 06 72 may 2006 page 2 disclaimer this has been the information contained in with care by pracsys and includes from apparently reliable secondary data sources which authors have relied on completeness accuracy however does not guarantee nor is it intended to form part of any contract accordingly all interested parties should make their own inquiries verify responsibility satisfy themselves respects use only party whom addressed disclaims third acting upon or using whole its contents 3 table executive summary 7 a flexible policy tool study approach benchmarks bau targets 8 methodology 9 results 14 1 context 17 purpose