The minimum design and performance standards for groundwater recharge require compliance with either of the following:
Demonstrate through hydrologic and hydraulic analysis that the site
and its stormwater management measures maintain 100 percent of the
average annual pre-construction groundwater recharge volume for the
site.
Demonstrate through hydrologic and hydraulic analysis that the increase of stormwater runoff volume from pre-construction to post-construction for the two-year storm is infiltrated.
In order to control stormwater runoff quantity impacts one of the following must be demonstrated:
Demonstrate through hydrologic and hydraulic analysis that for stormwater leaving the site, post-construction runoff hydrographs for the 2, 10 and 100-year storm events do not exceed, at any point in time, the pre-construction runoff hydrographs for the same storm events;
Demonstrate through hydrologic and hydraulic analysis that there is no increase, as compared to the pre-construction condition, in the peak runoff rates of stormwater leaving the site for the 2, 10 and 100-year storm events and that the increase volume or change in timing of stormwater runoff will not increase flood damage at or downstream of the site. This analysis shall include the analysis of impacts of