(1) The well screen configuration, construction, and type of material used should be based on the in-field environmental and physical conditions.

(2) Drilling fluids which will contaminate the aquifer shall not be used.

(3) In areas of known contamination, materials which will not corrode in the environment in which they are placed shall be used.

(4) The well screen and well casing shall be new and be of sufficient structural strength to protect the integrity of the well.