J_2024 05 09_West Orange Stormwater Management Plan

Initially, the filter media is light tan or white in color. When the media color turns black, it has become saturated due to pollutant loading and requires replacement. Call toll free (888) 344-9044 to order replacement filters. An entry riser provides direct access into the filtration chamber with a permanent ladder welded into the downstream section of the chamber. This additional access allows for the vacuuming of any standing water and an unobstructed walkway to the downstream side of the filter bed. A permanent ladder provides access to filter chamber Replacement of the filtration media typically requires entry into the filtration chamber by one of a twomember maintenance crew. Confined space entry precautions should be taken by the maintenance crew when removing and replacing the filters. The spent filter containers are normally retrieved from the filter chamber by a second crewmember at the surface through the multiple 30-inch risers spaced across the top of the filter bed. In addition, the filter containers can be accessed directly from within the filtration chamber via a vertical removable panel at the rear of the filter bed. The center row of the filtration bed has been fitted with one inch thick removable fiberglass grate panels. This allows for a six-foot tall walkway down the center of the chamber, providing easy access to the full length of the filtration chamber. Rows of removable side grates are positioned on both sides of the center row. After the center grate panel has been removed, the filter media can be lifted from these side grate panels. gwrsaws ~. t y_ r : After the removable sides have been loaded Grata panels (shown) or cargo netting with replacement filter containers, the cover the filter media removable center grates are repositioned and locked in place. New filters are installed in a criss-cross manner to prevent short-circuiting (see Appendix).