Construction dewatering is required on nearly all construction sites for the removal of accumulated groundwater or surface water from retention ponds, trenches and excavations. Dewatering is also necessary to avoid the erosion or contamination of soil and provide a safe work environment for the project.
Typically, dewatering requires the use of pumping from rim ditches, trenches or well points and is usually completed prior to and during excavation. The water is then treated to remove contaminants before discharge to land, surface water or storm sewer inlets.
Evoqua works closely with contractors and construction companies to provide mobile treatment solutions for the removal of contaminants that may include suspended solids, organic hydrocarbons, polychlorinated biphenyls (PCBs), heavy metals, lead, iron, emulsions, algae, dyes, ultra-trace mercury, selenium and more. Our innovative suspended solids removal system (SRS) is designed to treat flow rates from 10 gallons per minute to 6,000 gallons per minute and water volumes of 10,000 gallons to over 100 million gallons. This system does not require constant supervision and can monitor the discharge water quality continuously. It can also be set-up to automatically shut down or reprocess the water if appropriate discharge limitations are not met.
Our diverse, mobile treatment systems are enclosed making them ideal for sites with noise restrictions and can also address odor and air emission issues to ensure compliance.