2009 Statement of Heritage Impact: The Assay Office and Chimney The Old Assay office of Port Kembla Copper, date unknown. Note manicured office garden in the administration area. IndustrialMiningIllawarraHeritage AssessmentResearch Authors: Dr Sue Rosen and Mr David Sheedy Client: Port Kembla Copper Pty Ltd The objective of this Heritage Impact Statement is to assess the impact of the demolition of the Port Kembla Copper Smelter on the heritage values and significance of the former Assay Office and the 60 ft chimney stack, a remnant from the former precious mtals mill. Both are listed on the Wollongong LEP as items of local significance.