Reconstructing Sherman Hill: Safer Road Ahead! | Fixing "Raccoon-gate": How Team Elmer's Helped Treat E-Coli at East Bay ParkWhen a family of raccoons decided to nestle their homes within the storm drains of East Bay Park, they probably didn’t anticipate the negative impacts they would have on a nearby family beach. But when the rain came and washed raccoon feces out of the drains and into the bay, E-Coli contamination rapidly spread throughout the waters of the small park. Elmer’s got to work in late April, installing a trio of three-step filtration systems that will greatly cut back on bacterial contamination and keep problems like “Raccoon-gate” from recurring in the future. The steps of the new systems are outlined below: 1) Aqua Swirl System: Once installation was completed on an intricate weir structure, built to redirect water flow and integrate the new drainage systems with existing storm drains, Team Elmer’s implemented this aqua swirl system, a first-pass filtration feature. Though the project’s heavy lifting was handled in later steps, the aqua swirl system will prove useful in removing cigarette butts and other paper debris from runoff water flow. 2) Settling Tank: This 36,000-pound behemoth boasts dual-chamber separation that captures dirt, sand, and other debris that the aqua swirl system missed the first time around. 3) Helix Filtration System: This 54,000-pound stainless-steel screen filter piping structure features a precise fan system and treated antibacterial surfaces, designed to propel, attract, and filter E-Coli contaminants as water passes through the apparatus. An outlet pipe then sends the treated water to one of two catch basins. Once the water has been separated and treated, it is discharged to a retention area, built from catch basins and extensive elliptical pipe systems, which then carry it to an outlet channel. To slow the velocity of outlet water and reduce erosion risk, Team Elmer’s lined the channel with a riprap, “rock armor” wall. Now, the state-of-the-art water treatment system is ready for future raccoons and the water-loving public. |