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There is alot of diiferent ways to deal with stormwater in use depending on what the primary concern is. Water quality is quickly gaining on, if not exceeding concerns of peak discharge control. Nearly all methods will assist with both, and their is a lot of information available online through...

Secondary treatment systems such as the "Bioclere" (Aquapoint), "Advantex" (Orenco) or the various peat systems may qualify for reductions in setbacks, groundwater seperation or loading rate per your local or state regulations. These systems can significant reduce effluent strength. However, the...

The only caution i would like to add is consideration to downstream systems. If they have been designed to handle a postdevelopment 5 year event for the upsteam drainage system, you may create adverse conditions downsteam. I agree, 10 yr is pretty common for sizing storm sewers.

An "in ground" system may not be completely unfeasible, assuming you mean a closed drainage system. A plastic drain basin from a bldg supply store along with corrugated plastic pipe would require minmal cover in non-traffic bearing situations. Even if the pipe is flat, head will push runoff...

We have similar regulations in NC. Typically systems are designed as off-line as well, where the treatment system is designed to handle the runoff from 1" (or more) of rainfall (merely a volume calc). This may be oversized to comply with more strict local regs, or excess is diverted to a...

I have a situation that involves grout failure resulting in infiltration at pipe connections to drop inlets in areas with sandy soils and hydrostatic pressure from very high groundwater tables. The connections (supposedly) were made using non-shrink grout on precast drop inlets. The problem does...

Hello all... I am looking for good information on estimating the seasonal high water table elevation. (without setting a monitor well and observing for a year). This would be used for purposes of determining the minimum bottom elevation for infiltration areas (2' above the SHWT). I know...

The AASHTO "Green Book" - A Policy on Geometric Design of Highways and Streets is pretty much the standard on roadway layout. Most municiplalities or counties have their own guidelines, and all states do, but from what i have seen, they are usually a reiteration of the green book.

Hi md - I am assuming the pumps are always on because they are constantly seeing inflow (as opposed to a problem with the float, in which case the pumps would have burnt out already). Are you aware of where the groundwater table is? Use of an hand auger could help determine that for a depth of...