Florida Administrative Code › 62 - DEPARTMENT OF ENVIRONMENTAL PROTECTION › 62 - Departmental › Chapter 62-528 - UNDERGROUND INJECTION CONTROL › Section 62-528.410 - Well Construction Standards for Class I and III Wells

Current through Reg. 50, No. 138; July 16, 2024
(1) General Design Considerations.
(a) All Class I and III wells shall be cased
				and cemented to prevent the movement of fluids into or between underground
				sources of drinking water, and to maintain the ground water quality in aquifers
				above the injection zone that may be used for monitoring or other
				purposes.
(b) All Class I wells
				shall be designed and constructed so that they inject into a formation which is
				beneath the lowermost formation containing, within one quarter mile of the well
				bore, an underground source of drinking water.
(c) In the design specifications for a Class
				I well, the applicant shall address the problem of corrosion, proposed
				protective measure(s), and, when appropriate, proposed methods of monitoring.
				The applicant shall consider thickness and type of cement, number and thickness
				of casings, casing material, casing coatings, formation fluid (water) quality,
				injection fluid quality and life expectancy of the well.
(d) For Class I wells all outer surfaces of
				uncemented casings or portions of casings shall be coated or otherwise
				protected against corrosion. This protection shall extend for a minimum
				distance of thirty feet above and below the uncemented portion of the
				casing.
(e) All Class I injection
				wells, except those municipal wells (publicly or privately owned) injecting
				noncorrosive wastes, shall inject fluids through tubing with a packer set
				immediately above the injection zone, or tubing with an approved fluid seal as
				an alternative. All existing non-municipal wells constructed without tubing and
				packer or a fluid seal shall modify their design to incorporate a tubing and
				packer or fluid seal no later than July 1, 1997, or cease injection unless an
				alternative to a packer has been approved by the Department under subparagraph
				1., below. Existing wells receiving non-municipal waste through a tubing and
				packer shall not be allowed to remove the tubing and packer as long as
				injection of non-municipal waste continues unless an alternative to a packer
				has been approved by the Department under subparagraph 1., below. The tubing,
				packer, and fluid seal shall be designed for the expected service.
1. The use of other alternatives to a packer
				shall be allowed with the written approval of the Department. To obtain
				approval, the applicant shall submit to the Department a written request which
				shall set forth the proposed alternative and all technical data supporting its
				use. The Department shall approve the request if the applicant demonstrates
				that the alternative method will reliably provide a comparable level of
				protection to underground sources of drinking water.
2. In determining and specifying requirements
				for tubing, packer, or alternatives, the following factors shall be considered:
a. Depth of setting;
b. Characteristics of injection fluid
				(chemical content, corrosiveness, and density);
c. Injection pressure;
d. Annular pressure;
e. Rate, temperature and volume of injected
				fluid; and
f. Size of
				casing.
(f) For
				Class I wells the following designs are not allowed:
1. Annuli between casings open to the land
				surface in any injection well, and
2. Monitoring tubes emplaced and cemented in
				the annulus adjacent to the innermost or injection string of
				casing.
(g) For all Class
				I wells, the applicant shall address potential surge and water hammer
				protection to protect the safety and integrity of any injection well
				system.
(h) Department approval, as
				described in subsection
				 62-528.100(2),
				F.A.C., is required prior to any of the following:
1. Remedial procedures that alter the basic
				design specifications, materials, or character of a Class I or III
				well;
2. Any work requiring the
				complete removal of the wellhead; or
3. Any injection of fluids other than those
				authorized under the existing permit.