- (1) In constructing a water well, care shall be taken to preserve the natural barriers to groundwater movement between aquifers.
- (2) Care shall be taken to seal aquifers or strata penetrated during drilling operations which might impair water quality or result in cascading water.
- (3) Water wells may not interconnect aquifers.
- (4) All sealing must be permanent and prevent movement of surface, or groundwater into the annular space between the permanent casing and the bore hole.
- (5) Sealing shall prevent the upward movement of artesian waters within the annular space around the well casing and prevent the contamination or wasting of groundwater.
- (6) Sealing shall prevent the movement of groundwater either upward or downward from zones that were cased off.
[Statutory Authority: Chapter 18.104 RCW and RCW 43.21A.080. WSR 98-08-032 (Order 97-08), § 173-160-181, filed 3/23/98, effective 4/23/98.]