The SwaleGard pre-filter is an inlet pre-treatment device that removes gross solids, trash and debris as well as petroleum hydrocarbons from storm water runoff before reaching a swale or bioretention facility. The SwaleGard pre-filter traps large trash and debris in the upper chamber and smaller sediment in a collection basket below. The device also provides hydrocarbon removal using sorbent pouches. Sediments and associated pollutants can inhibit the infiltration rate of bioretention cells, and the SwaleGard pre-filter captures such pollutants in one location before they get to the bioretention facility. By preventing these pollutants from reaching the bioretention surface, the SwaleGard pre-filter enhances treatment performance, extends the service life of the treatment area, and simplifies maintenance. As with any storm water treatment system, the SwaleGard pre-filter requires regular maintenance to prolong the life of the system. Routine maintenance is accomplished by removing accumulated pollutants from the inlet screen by hand or by using a vacuum truck and replacing the sorbent pouches. Frequency of maintenance depends on the conditions of the site and performance of the system.
5106-1-LA/WA Vault 5′ x 10′-6″