Carnaross Sand & Gravel Ltd supply sand suitable for percolation areas for wastewater treatment. Our sand is a natural non limestone silica sand sourced from our own Sand and Gravel pit. The sand conforms to the EPA code of practice for sand filters as per Table 10.2 of the code. We also supply the natural round stone suitable for percolation which is also non limestone. Carnaross Sand & Gravel are working with engineers in this area on both domestic and commercial systems.