Background Information and Challenges
To meet permitting requirements, the property’s development required a stormwater storage system with a storage capacity of 500,000 Gallons. Tank installation required a 5′ excavation to encapsulate the system, but the existing grade was 2′-4′ below this. Tank installation could not be started until late October.
Solution
Working around the weather, Layfield crews supplied and installed Brentwood StormTank® 25 Series single stack modular tanks with a ¾” clear rock fill within a Layfield Enviro Liner® 1030 LLDPE 30 Mil Liner, allowing for complete stormwater storage requirements. The Earthworks contractor brought in a pit run style fill that allowed for compact fill around the tanks, and then was able to cut out around the edges, allowing for installation. Layfield’s Enviro Liner® 1030 liner was used as a long-life liner system, with quality installation provided by Layfield Installation crews. Brentwood Debris Rows were installed to allow for the capture of particulates for periodic maintenance. Ports at the top of the system allow for clean-out.
Results
The stormwater system, completed in the building’s new facility, stores all the water needed to prevent stormwater runoff. It uses an in-ground storage retention system featuring Brentwood H25 Tanks and a Layfield Enviro Liner® system. The new system maximizes the available parking space. Flexibility in the layout allows for cutouts for trees and plants in and around the stormwater system.
