The well locations are within SCDHEC's designated Area 3 (Low Vulnerability Geographic Area).
For wells installed prior to well construction regulations - the susceptibility of the well to all sources will automatically be moderate regardless of the physical/chemical characteristics of the contaminants present in the groundwater capture zone. This susceptibility degree may be reduced upon submission of supporting data.
For wells installed after well construction regulations - the susceptibility of the water supply well will be evaluated based on the physical/chemical characteristic of the contaminants present as follows:
CHLORINATED SOLVENTS (AND OTHER SELECT VOCs) - These chemicals are more dense than water and sink, and they are very mobile. The susceptibility of the well to such a source is moderate.
PETROLEUM - These chemicals are less dense than water and degrade relatively easily. The susceptibility of the well to such a source is low in this area.
METALS - These chemicals sorb to the soil matrix and do not readily migrate vertically. The susceptibility of the well to such a source is low.
PESTICIDES/HERBICIDES - These chemicals sorb to the soil matrix and do not readily migrate vertically. The susceptibility of the well to such a source is low.
PATHOGENS - Pathogens are most likely introduced through poor well construction or where surface waters are pulled into the well. If neither condition is present, the susceptibility of the well to such a source will be low. If either condition is present, the susceptibility assigned will be high.