Florida Administrative Code › 40 - WATER MANAGEMENT DISTRICTS › 40A - Northwest Florida Water Management District › Chapter 40A-3 - REGULATION OF WELLS › Part II - CONSTRUCTION, REPAIR, AND ABANDONMENT STANDARDS › Section 40A-3.517 - Grouting and Sealing

Current through Reg. 50, No. 138; July 16, 2024
Wells shall be grouted and sealed to protect the water
					 resource from degradation caused by movement of waters along the well annulus
					 either from the surface to the aquifer or between aquifers, and to prevent loss
					 of artesian pressure in artesian aquifers. All wells shall be constructed and
					 sealed using a method which insures that an open or unnaturally permeable
					 annular space does not remain when a well is completed.
(1) Rotary wells located south of grout line.
				  The grout line is established in a Florida Department of Environmental
				  Regulation Grout Exemption Letter, effective 9-10-1980,
http://www.flrules.org/Gateway/reference.asp?No=Ref-08941
,
				  and is hereby incorporated by reference and can be obtained from the District's
				  website (nwfwater.com) or from District offices upon request. Wells constructed
				  by the rotary method and located south of the grout line shall have an annular
				  space between the casing and the borehole wall of not less than two inches and
				  shall be sealed according to the following criteria:
(a) All diameter wells constructed by the
				  rotary method and completed into a consolidated formation shall be sealed by
				  filling the annular space with a two-inch thickness of grout from the bottom of
				  the casing to the land surface.
(b)
				  Wells constructed by the rotary method and completed into an unconsolidated
				  formation shall be sealed by filling the annular space with a two-inch
				  thickness of grout from a point above the top of the screen to the land surface
				  if:
1. The well is a public water system as
				  defined in subsection
				   40A-3.021(39),
				  F.A.C., of this rule;
2. The well
				  is for Limited Use Public Supply use as defined in subsection
				   40A-3.021(35),
				  F.A.C., of this rule;
3. The well
				  has a diameter of six inches or larger;
4. The well penetrates a confining
				  bed;
5. The well is to be located
				  within one thousand (1, 000) feet of any source of pollution, including plants
				  processing hazardous or toxic substances, sanitary landfills (active or
				  closed), sewage percolation ponds, sewage spray irrigation fields, toxic waste
				  disposal systems of any kind including known ground water contamination areas,
				  or other such sources of pollution; or
6. The well, with an approved exemption from
				  the District, is to be located within seventy-five (75) feet of an onsite
				  sewage disposal system (OSDS).
(c) Wells constructed by the rotary method
				  and completed into an unconsolidated formation, but which do not meet the
				  conditions identified in paragraph (1)(b), shall be sealed by filling the
				  annular space with uncontaminated, well-compacted sand and sealing the top of
				  the casing with grout that contains a minimum of one (1) cubic foot of
				  cement.