The Adventure Park stormwater capture project in Whittier, CA, involves the construction of an underground stormwater storage and treatment system capable of holding approximately 19.5 acre-feet of water. The primary objective of this project is to divert stormwater from Sorensen Drain to an underground concrete vault. This vault serves as a pre-treatment facility to ensure that stormwater meets regulatory standards before it is discharged into the local sanitary sewer system.
The Challenge
The construction of the new vault posed significant challenges, particularly due to the high groundwater table prevalent in the area. Managing groundwater during excavation was critical, necessitating a robust groundwater control system to mitigate potential issues. During the planning phase, groundwater samples were analyzed to assess water quality against the Water Quality Board’s maximum contaminant levels (MCLs) for discharge compliance. Analysis revealed elevated perchlorate concentrations exceeding recommended MCLs, highlighting the imperative for treatment of dewatering effluent before discharge. Given the scale and depth of the excavation, anticipated flow rates at the site were substantial, necessitating large-scale treatment equipment. Perchlorate, being a highly soluble contaminant, demanded specialized ion exchange treatment for effective removal.
The Solution
Griffin tailored a comprehensive solution to address these challenges, designing and installing a groundwater control system around the storage vault capable of handling flow rates of up to 500 gallons per minute (gpm). The treatment process integrated mechanical filtration alongside specialized ion exchange media specifically engineered to eliminate perchlorate from the water. This integrated approach not only ensured compliance with regulatory standards but also optimized operational efficiency throughout the project lifecycle. Griffin’s comprehensive dewatering and water treatment services ensure seamless project execution and simplify client project management. Their dedicated field teams expertly handle every aspect through meticulous system installation and maintenance, delivering exceptional results and upholding Griffin’s standard of excellence.
