Florida Administrative Code › 62 - DEPARTMENT OF ENVIRONMENTAL PROTECTION › 62 - Departmental › Chapter 62-528 - UNDERGROUND INJECTION CONTROL › Section 62-528.425 - Monitoring Requirements for Class I and III Wells

Current through Reg. 50, No. 138; July 16, 2024
(1) Class I
				Wells. For Class I wells, monitoring requirements shall include:
(a) The analysis of the injected fluids at a
				frequency specified in the permit to yield representative data on their
				characteristics;
(b) The
				installation and use of continuous indicating, recording, and totalizing
				devices to monitor flow rate and volume, and installation and use of continuous
				indicating and recording devices to monitor the injection pressure and the
				pressure on the annulus between the tubing and the final or innermost string of
				casing, if there is an annulus;
(c)
				A controlled injection test or a bottom hole pressure survey, if a long-term
				trend of increasing injection pressure is indicated.
(d) A demonstration of mechanical integrity
				pursuant to subsection
				 62-528.300(6),
				F.A.C., at least once every five years during the life of the well; and
1. As part of the baseline monitoring
				information, a video television survey from the surface to the bottom of the
				injection zone shall be run prior to injection but after completion of testing,
				except for those wells that inject through tubing or where it is physically
				impossible to do so, and every five years thereafter, or more frequently if
				impairment of the integrity of the casing, tubing, or formation is suspected
				based on physical or geochemical data such as water quality, pressure changes,
				or mechanical integrity results.
2.
				The television survey may be either black and white or color.
3. Adequate provisions shall be made to
				centralize the camera in the borehole.
4. Before running the survey, adequate
				provisions shall be made to assure that fluid in both the casing and open
				borehole is of sufficient clarity to provide a baseline survey of a quality
				acceptable to the Department.
(e) An application to construct or operate a
				Class I well, and such permit shall address the following:
1. The type, number, and location of well(s)
				within the area of review to be used to monitor:
a. Any potential migration of fluids into or
				in the direction of underground sources of drinking water, and
b. Pressure in the underground sources of
				drinking water;
2. The
				parameters to be measured; and
3.
				The frequency of monitoring.
(f) The background water quality of the
				injection zone and the monitoring zone(s) shall be determined prior to
				injection for both domestic wastewater wells and industrial Class I wells
				(including desalination process reject water), in accordance with the sampling
				and testing methods outlined in Rule
				 62-601.400, F.A.C. Background
				levels shall be determined pursuant to the following criteria:
1. For monitor zones in Class G-I, F-I, G-II
				or G-III ground waters the primary and secondary drinking water quality
				parameters listed in Rules
				 62-550.310 and
				 62-550.320, F.A.C., and the
				minimum criteria provided in Rule
				 62-520.400, F.A.C.
2. For the injection zone and monitor zones
				in G-IV ground water the criteria shall be established in accordance with Rule
				 62-520.440,
				F.A.C.
(g) The Department
				shall require monitor wells above the injection zone near the injection well,
				field or project.
1. The permittee shall be
				able to monitor the following:
a. The absence
				of fluid movement adjacent to the well bore, and
b. The long-term effectiveness of the
				confining zone.
2.
				Monitor wells used to meet the requirements of subparagraph 1. above shall be
				sampled periodically. The frequency of sampling and constituents to be analyzed
				shall be specified in the permit and shall be representative of the monitored
				activity.
3. Monitor wells used to
				meet the requirements of 1.a. above shall be located within 150 feet of the
				injection well unless the applicant can demonstrate, through a hydrogeologic
				study, that a monitor well located at a greater distance will be capable of
				adequately monitoring fluid movement adjacent to the borehole.
4. The permittee shall monitor a zone below
				the base of the underground source of drinking water, if a zone is available,
				and at least one zone within, and near the base of, the underground source of
				drinking water.
5. The Department
				shall also require any of the following when needed to provide reasonable
				assurance that the requirements of 1. above are being met:
a. Continuous monitoring for pressure changes
				in the first aquifer overlying the confining zone.
b. Continuous monitoring for pressure changes
				in any monitor well constructed under subparagraph 1. above.
c. Periodic monitoring of ground water
				quality in the first aquifer overlying the injection zone.
d. Periodic monitoring of ground water
				quality in the lowermost underground source of drinking water.
e. Periodic additional monitoring to
				determine whether fluid movement caused by underground injection activity is
				occurring into or between underground sources of drinking
				water.
(h) The
				Department shall require monitor wells above and in the injection zone at a
				sufficient distance from the well, field or project for regional monitoring if
				such monitoring is necessary to protect waters of the State.
(i) When direct monitoring required under
				paragraph (g) above can not be provided or the results of such monitoring fail
				to provide reasonable assurance, the Department shall require the additional
				use of indirect geophysical techniques and computer modeling or such other
				techniques capable of providing reasonable assurance as to:
1. The position of the waste front,
2. The water quality in a
				formation or zone, or
3. Other site
				specific data.
(j) For
				Class I wells, a five gallon unacidized representative sample of native water
				from the injection zone shall where practical be collected and provided to the
				Florida Department of Environmental Protection, 2600 Blair Stone Road,
				Tallahassee, Florida 32399-2400 or a laboratory specified by the
				Department.
(k) Post-closure
				Monitoring. For Class I wells, if necessary to protect underground sources of
				drinking water the permit applicant shall be required to submit a post-closure
				monitoring plan designed to monitor the attenuation of any pressure effects and
				water quality changes caused by the underground injection operation both in the
				injection zone or in overlying aquifers. The proposed monitoring plan shall at
				a minimum use the injection wells and associated monitor wells, to the extent
				that they are capable of yielding representative ground water samples. The
				proposed monitoring plan may also include other accessible wells.
1. Items to be addressed by the permit
				applicant in the proposed post-closure monitoring plan shall include:
a. Designation of the wells to be used for
				post-closure monitoring;
b. The
				parameters to be monitored, by well;
c. The sampling frequency;
d. The proposed duration of the post-closure
				monitoring period; and
e. A
				documented estimate of the total cost of the post-closure monitoring
				program.
2. A revision of
				the post-closure monitoring plan shall be required by the Department when
				needed to reflect changes in the design or scope of the underground injection
				operation, inflation of costs associated with the plan, or other factors
				resulting from the construction or operation of the injection well system. The
				permittee also may initiate modification of the post-closure monitoring
				plan.