Water quality volume definition

Water quality volume means the volume equal to the first one-half inch of runoff multiplied by the impervious surface of the land development project.

Water quality volume means the volume equal to the first one-half inch of runoff multiplied by the

Water quality volume means ½ inch of runoff from the new impervious surfaces created by this project and is the volume of water to be treated in the permanent storm water management system, as required by this permit except as provided in Appendix A.C.2.

Examples of Water quality volume in a sentence

• Water quality volume Stormwater systems are engineered to handle specific runoff volumes and flow rates.

• Water quality volume is calculated using the Small Storm Hydrology Method.A 1-year frequency rainfall may be used with the time-of-concentration of the contributing drainage area to calculate the peak flow rate for sizing diversion structures and treatment BMPs.Note: A 1-inch, 1-hour rainfall has approximately a 1-year frequency of occurrence.

• Water quality volume is required to treat the “first flush” of storm water runoff that typically carries with it the highest concentration of pollutants.

• Water quality volume and post construction treatment data shall be supplied.

• Water quality volume should be estimated based on the criteria set forth in Chapter 7 of this manual.

More Definitions of Water quality volume

Water quality volume or “WQV” means the volume of runoff generated by one inch of rainfall on a site as defined in the 2004 Connecticut Stormwater Quality Manual, as amended.

Water quality volume means (by type of project):

Water quality volume means the volume equal to the first one-half inch of runoff multiplied by the 645 impervious surface of the land development project technical criteria" means standards set forth in 646 regulations adopted pursuant to this article that establish minimum design criteria for measures to 647 control nonpoint source pollution.

Water quality volume or “WQv” means the storage needed to capture and treat ninety percent (90%) of the average annual stormwater runoff volume, and in Rhode Island this equates to one (1) inch of runoff from impervious surfaces.

Water quality volume means the runoff resulting from rainfall depth of 1.25”. By managing these storms, many of the “first flush” pollutants of concern will be effectively managed on-site.

Water quality volume means one (1) inch of runoff from the new impervious surfaces created by this project (calculated as an instantaneous volume) and is the volume of water to be treated in the Permanent Stormwater Management System, as required by this permit.

Water quality volume means the volume of runoff generated by one inch of rainfall on the site.