J_2024 05 09_West Orange Stormwater Management Plan

Step 1: Pretreatment Peripheral pre-treatment of stormwater is not necessary when using the AquaFilter™ Stormwater Filtration System. In fact, each Aqua-Filter™ is custom engineered to utilize a unique treatment sequence where both the coarse- and fine- grained pollutants are removed. ftjf Vltahi* This sequence begins with the AquaSwirl™ Stormwater Treatment System designed to target the removal of TSS Aqua-Swirl™ to be connected to the Aquaand free-floating oil and debris. The Filter™ Stormwater Filtration System addition of the Aqua-Swirl™ allows larger debris to settle before filtration and increases filtration effectiveness Step 2: Filtration 3b The filtration chamber in the Aqua-Filter™ is designed to refine and enhance the stormwater quality prior to discharge Into sensitive receiving waters. The peak filtration flow rate is based on the calculated "water quality treatment" requirements desired for the site. The Sizing Chart provided later in this Section indicates the peak filtration flow rate for the specific Aqua-Filter™ model. Aqua-Filter™ system lowered into place As the pre-treated water enters the filtration chamber, it is evenly distributed across the filter bed and allowed to permeate through the filter media. The filter media are contained in individual sections, which are layered in a pattern to avoid short-circuiting. Aqua-Filter™ Filter Media The natural filter media used for filtration are capable of removing the remaining waterborne pollutants such as oils, grease, fine silts and clays, nutrients (nitrogen, phosphorus), and heavy metals (copper, lead, zinc). The most commonly used media is medium-grained perlite. Other filter media, such as zeolite, granulated activated carbon, leaf compost, and various media blends are available.