(Patent # 7276156)
Non-Point stormwater pollution of the Earth’s fresh water systems caused by decades of urban land-change-use practices has been well documented by numerous research studies worldwide. In order to sustain life and urban growth it is becoming more important to minimize the harmful affects on the environment caused by urban stormwater discharge.
A stormwater discharge is defined by the US Environmental Protection Agency (EPA) as rainwater or snowmelt runoff. These fresh waters become polluted as they flow over modern man-made structures like roads, parking lots, industrial sites, roofs, suburban lawns, etc. An abundance of suspended pollutants can easily ride piggyback on sediment particles and leaves in such water flows. Types of pollutants include road salts, calcium chloride, motor oils and fluids, rubber, lawn fertilizers and chemicals, E. coli from house pet feces, and many others.
These non-point polluted waters are a known contributor to poor water quality levels in receiving streams that suffer fish kills, river bank erosion from suspended sediments, and other environmentally harmful side effects. In order to minimize non-point pollution the EPA and state governments are requiring municipalities to implement stormwater management programs.
Trash Guard, Inc. has developed a patented catch-basin trash screen for municipalities to have trash free stormwater discharge.
Trash Guard, Inc. offers Three Guard screen sizes for In-Place or newly formed Catch Basins that utilize Discharge Pipes of 24 Inches or less in diameter. Depending on the depth of the Catch Basins and which Trash Guard Models are used, will determine how much outflow each model can accommodate.
Three Screen sizes can accommodate outflow from 5.24 CFS to 13.82 CFS, depending on the size Trash Guards used, with no sediment and trash accumulation. See the Calculated Flow Spreadsheet below to see how Total Flow is reduced by Debris Buildup. It is important to determine the Total Flow expected from the drainage area of each Catch Basin with a Trash Guard installed to determine when maintenance is required. You may call Trash Guard for assistance in calculating this information if this information is not available for you. Trash Guards Plus loses weir flow because of all the ribs in the weir designed to stop trash entering Underground Stormwater Storage Tanks. When installing Trash Guards in Leafy Vegetated
Residential areas and the Stormwater enters the Catch Basins on a Downslope causing Turbulence when it enters the Catch Basins, Regular Trash Guards should be used. If Regular Trash Guards are not available, remove some of the ribs from the Top Orifices with a Jig Saw converting the Trash Guard Plus to a Regular Trash Guard. This will prevent leaves from blocking the Top Orifices causing street flooding.
Trash Guards are simple to install, and with accessories available, can accommodate all retrofit situations, such as uneven and concave walls, rounded bottoms, and sump bottoms. They also can be adjusted to fit Round Concrete Catch Basins and can be altered to enter Catch Basin Manholes.
Often in Phase I (cities with population of at least 100,000) and large Phase II municipalities available land is limited for green space, detention ponds, constructed wetlands and other traditional Best Management Practices (BMPs). With this limitation larger towns and cities can especially benefit by making Trash Guard an integral component in its Municipal Separate Storm Sewer System (MS4) management program.
A plastic screen with circular outlet holes to be patently mounted to a catch-basin wall to encase an outlet pipe.
- Captures Debris
- Captures Contaminated Sediments
- Captures Floatables
Provides your city with an inexpensive solution to stormwater pollution.
Trash Guard Highlights
- Captures debris, sediments & floatables
- SIMPLE retrofits to existing catch-basins
- Installs without heavy equipment
- No power needed to operate
- Adjusts to irregular catch-basin bottoms
- Adjusts to irregular catch-basin walls
- Stops sediment collection in detention/treatment ponds & fishery spawning beds
- Eliminates eyesore stormwater trash at public parks, beaches, and waterways