Y ddau safle i'w cynnwys yw:ystâd Ddiwydiannol Llwyn Onn, safle 15 hectar a oedd yn gartref i weithrediadau Rehau ar yr ynys. Ar hyn o bryd mae uned 20,000 troedfedd sgwâr yn wag ar y safle.hen waith bromin Octel, a ddaeth i ben yn 2004. Roedd y safle ar waith ers dros 50 mlynedd ond ers hynny mae wedi dadfeilio, gyda llawer o'r adeiladau bellach yn adfeilion.
The two sites to be included are:the Llwyn Onn Industrial Estate, a 15 hectare site which was the home of Rehau’s operations on the island. There is currently a 20,000 square foot unit vacant on the site.the Octel former bromine works, which ceased operations in 2004. The site was in operation for over 50 years but, has since fallen into disrepair, with many of the buildings now laying derelict.