Stormwater Dry Well Maintenance

Also if a dry well is dug too deep the bottom of the well will be of close proximity to the groundwater table.

Stormwater dry well maintenance.

They trap sediment and oily pollutants in runoff and they can fill with oily sediment in areas that lack treatment facilities. Dry wells treat stormwater runoff through soil infiltration adsorption trapping filtering and bacterial degradation. Inspect your gutters after storms to make sure that rain water properly drains to the dry well. Typically 10 feet of vertical separation is required between the dry well bottom and the water table and a vadose zone of sand gravel and clay is ideal for removing contaminants while still allowing aquifer recharge.

Place gutter guards or screens on top of roof downspouts to filter out leaves and sediment before the stormwater reaches the dry well. Ensure caps on observation wells are fastened. Inform contractors working on your property of the dry well s location to prevent accidentally damaging it. A dry well may be either a structural chamber and or an excavated pit filled with aggregate.

The use of dry wells is applicable for small drainage areas with low sediment or pollutant loadings and where soils are sufficiently permeable to allow reasonable rates of infiltration. Discharge of this stored runoff from a dry well occurs through infiltration into the surrounding soils. Contaminant rich areas such as gas stations and many industrial sites are often unsuitable for dry well installation. Many well functioning smps can be adequately maintained for long periods of time using level 1 capabilities.

For instance if a dry well is not fixed with the appropriate materials any stormwater that will pass through it can be contaminated by surrounding pollutants agi 2020. Inspect your gutters after storms to make sure stormwater drains properly to the dry well. Inspections and maintenance activities. Drywells rely on the stormwater soaking into the surrounding soil.