Is groundwater recharge required when the underlying substrate is limestone (karst geology)?
If a portion of a site contains karst geology, the Department encourages the placement of any stormwater recharge facility outside of the karst areas. The groundwater recharge requirement is mandatory for all sites (with the exception of areas with high pollutant loading or runoff from source material). Project redesign to incorporate dispersed runoff instead of a structure for recharge or a reduction in scope may be necessary to ensure compliance with the rules in this area.
