Barry Walls Consultant Engineer Ltd. has been providing a high level of services to professionals within the construction industry and the public since 2002 which include: Site Suitability Assessment Reports for on-site wastewater treatment systems for single dwelling houses, residential, industrial and commercial developments ...more info.. Site Suitability Assessment Reports for out-wintering pads ...more info.. Site Suitability Assessment Reports for earth lined slurry stores ...more info.. Septic Tank Suitability Reports ...more info.. Design and certification of constructed wetlands/reed bed systems ...more info.. Certification of inspection, installation and maintenance of on-site wastewater treatment systems ...more info.. Percolation testing and design of stormwater soakaway systems using current BRE digest 365 guidelines. ...more info.. Planning pre-consultation for design consultants and private clients ...more info.. Trade Effluent and Sewage Effluent Discharge Licences ...more info..