b'LT ENGINEERINGCATALOGSYSTEM COMPONENTS EA = (Ai * 0.9) + (Ap * 0.03)The StormTrooper AQ shall consist of a control manholeWhere:connected to a separator unit to remove debris (TSS) andEA = Effective Area (ac)hydrocarbons from stormwater. Ai = Impervious Area (ac)Ap = Pervious Area (ac)The Separator Unit, shall be connected to the control manhole by means of a flexible resilient rubber boot StormTrooper models can be selected from the table [mortar joint].The unit shall maintain a minimum below that will achieve an 80 percent TSS reduction at the separation of 36 inches between the Control Manhole corresponding Effective Areas shown. The StormTrooperStormwater Qualityand the Separator Unit. SWAQ system for the Edwards Aquifer is designed using the overflow rates. These were calculated based on the surface The Separator Unit shall contain a prefabricated corrugatedarea of the vault alone and a rainfall intensity of 1.1 in/hr.plate for intermittent and variable flows of water, oil, or any combination of non-emulsified oil-water mixtures ranging from zero-flow up to 100 percent of the maximum hydraulicMAINTENANCEcapacity. This will allow the separator unit to maintain an acceptable water effluent. A preventative maintenance cleanout schedule is themost valuable tool for maintaining the proper operationof StormTrooper. Separator maintenance costs will be greatly DESIGN CONSIDERATIONS reduced if a good housekeeping plan for the property is As a flow-based BMP, the StormTrooper is designed usingdeveloped i.e., trash pickup, lawn maintenance, dumpster the treatment flow rate for the site, as calculated using thecontrol, etc. Rational Method. The runoff rate from the tributary area is calculated using Equation 3.4: StormTrooper separators have no moving parts and no filter cartridges. The manufacturer recommends quarterly Q = CIA ongoing inspections for accumulated pollutants. Pollutant deposition may vary from year to year. Quarterly inspections Where: ensure that the system is serviced at the appropriate times. Q =flow rate (ft3/s) Professional vacuum services shouldC=runoff coefficient for the tributary area be considered when capacities exceed these recommended I=design rainfall intensity (1.1 in/hr) levels.A=drainage area (ac)The runoff coefficient is calculated as the weighted averageIt is very useful to keep a record of each inspection; therefore, of the impervious and pervious areas. Runoff coefficientan inspection and maintenance form hasfor impervious areas is assumed to be 0.90 and the runoffbeen attached for your use.coefficient for pervious areas is assumed to be 0.03. Inspection ProceduresThe overflow rate (hydraulic loading rate) is calculated1.Easiest observation and maintenance is best using Equation 3.5: accomplished during non-flow (dry weather) conditions three to four days after the most recent rain.VOR = Q/A 2. Remove interceptor covers or open hatchway to observe conditions. Remove hatchway safety net (EnterNet). Where: Observe for trash and debris and remove if necessary. VOR = overflow rate (ft/s) This is the most important maintenance requirement. Q =runoff rate calculated with Equation 3.4 (ft3/s) If absorbent pillows are utilized, observe their condition. A=surface Area of Unit (ft2) Uniform browning or gray color of the pillow means they The overflow rate can then be used with the table toshould be replaced. Observe baffle debris screen and clean determine the StormTrooper unit that provides the desiredif necessary.TSS removal. 3. Coalescing plates are self-cleaning and seldom require The StormTrooper system is available in several models. maintenance unless damaged. Do not walk on or stand on The table below summarizes the various unit models andplate packs. their corresponding dimensions. 4. Check of the depth (level) of oil and sediment witha tank sampler device designed for this purpose. The characteristics of the catchment area are defined as Effective Area (EA). The Effective Area is the number of acres draining to a single treatment unit and is calculated using the following equation:INFO@PARKUSA.COM|888-611-7275|WWW.PARKUSA.COM 95'