A Division of the Georgia Department of Natural Resources

391-3-6-.13 Underground Injection Control

(1) Purpose. The purpose of this rule, 391-3-6-.13 is to establish classes of injection wells, prohibitions, criteria and standards applicable to injection wells.

(2) Definitions. All terms used in this rule shall be interpreted in accordance with the definitions as set forth in the Act, unless otherwise defined in this Paragraph or in any other Paragraph of this Chapter. All federal regulations adopted by reference are those in effect as of November 1, 1983.

(a) "Abandoned well" means a well whose use has been permanently discontinued or which is in a state of disrepair such that it cannot be used for its intended purpose or for observation purposes.

(b) "Aquifer" means a geological formation, group of formations, or part of a formation that is capable of yielding water to a well or spring.

(c) "Area of review" means the area surrounding an injection well or field where migration of the injection and/or formation fluid into an underground source of drinking water may occur.

(d) "Casing" means a pipe or tubing of appropriate material of varying diameter and weight, lowered into a borehole during or after drilling in order to support the sides of the hole and thus prevent the walls from caving, to prevent loss of drilling mud into porous ground or to prevent water, gas or other fluid from entering or leaving the hole.

(e) "Catastrophic collapse" means the sudden and utter failure of overlying strata caused by the removal of underlying materials.

(f) "Cementing" means the operation whereby a cement slurry is pumped into a drilled hole and/or forced behind the casing.

(g) "Confining bed" means a body of impermeable or distinctly less permeable material stratigraphically adjacent to one or more aquifers.

(h) "Confining zone" means a geological formation, group of formations, or part of a formation that is capable of limiting fluid movement above or below an injection zone.

(i) "Contaminant" means any physical, chemical, biological or radiological substance or matter in water.

(j) "Conventional mine" means an open pit or underground excavation for the production of minerals.

(k) "Disposal well" means a well used for the disposal of waste into a subsurface stratum.

(l) "Exempted aquifer" means an aquifer or its portion that meets the criteria in the definition of underground source of drinking water but which has been exempted according to the procedures in Rule 391-3-6-.13(4) of this Chapter.

(m) "Facility, operation or activity" means any injection well or system.

(n) "Fluid" means any material or substance which flows or moves whether in a semisolid, liquid, sludge, gas, or any other form or state.

(o) "Formation" means a body of consolidated or unconsolidated rock characterized by a degree of lithologic homogeneity which is prevailingly, but not necessarily, tabular and is mappable on the earth's surface or traceable in the subsurface.

(p) "Formation fluid" means fluid present in a formation under natural conditions as opposed to introduced fluids, such as drilling mud.

(q) "Generator" means any person, by site location, whose act or process produces hazardous waste identified or listed in Federal Regulations, 40 C.F.R. Part 261.

(r) "Groundwater" means water below the land surface in the zone of saturation.

(s) "Grout" means a mixture of not more than six gallons of clear water to one 95 pound bag of portland cement. The mixture may contain additives in proper amounts as necessary to reduce shrinkage and increase compatibility of the grout to injection and formation fluids.

(t) "Hazardous waste" means a hazardous waste as defined by the Georgia Hazardous Waste Management Act, Georgia Laws 1979, p. 1127, et seq., and the rules adopted pursuant to the Act.

(u) "Hazardous waste management facility" means all contiguous land and structures, other appurtenances and improvements on the land used for treating, storing, or disposing of hazardous waste. A facility may consist of several treatment, storage, or disposal operational units.

(v) "Injection" means the subsurface emplacement of fluids.

(w) "Injection well" means a well into which fluids are being, or intended to be, injected.

(x) "Injection zone" means a geological formation, group of formations, or part of a formation receiving fluids through a well.

(y) "Packer" means a device lowered into a well to produce a fluid-tight seal.

(z) "Person" means any individual, corporation, association, partnership, county, municipality, State agency, Federal agency or facility or other entity.

(aa) "Plugging" means the act or process of stopping the flow of all fluids, including water, oil or gas into or out of a formation through a borehole or well penetrating that formation.

(bb) "Radioactive waste" means any waste which contains radioactive material.

(cc) "Site" means the land or water area where any facility, operation or activity is physically located or conducted, including adjacent land used in connection with the facility, operation or activity.

(dd) "Stratum (plural strata)" means a single sedimentary bed or layer, regardless of thickness, that consists of generally the same kind of rock material.

(ee) "Subsidence" means the lowering of the natural land surface in response to: earth movements; lowering of fluid pressure; removal of underlying supporting material by mining or solution of solids, either artificially or from natural causes; compaction due to wetting (hydrocompaction); oxidation of organic matter in soils; or added load on the land surface.

(ff) "Underground source of drinking water" means all aquifers or portions of aquifers which are not exempted aquifers.

(gg) "Waters or Waters of the State" includes any and all rivers, streams, creeks, branches, reservoirs, ponds, drainage systems, springs, wells, and all other bodies of surface or subsurface water, natural or artificial, lying within or forming a part of the boundaries of the State which are not entirely confined and retained completely upon the property of a single individual, partnership, or corporation.

(hh) "Well" means a bored, drilled or driven shaft, or a dug hole, whose depth is greater than the largest surface dimension.

(ii) "Well injection" means the subsurface emplacement of fluids through a bored, drilled, or driven well or through a dug well, where the depth of the dug well is greater than the largest surface dimension.

(3) Classification of Injection Wells.

(a) Class I Wells. This class consists of industrial and municipal disposal wells that inject fluids other than hazardous waste or radioactive waste below the lowermost formation containing, within two (2) miles of the well bore (or greater distance if determined by the Director), an underground source of drinking water.

(b) Class II Wells.

1. This class consists of wells which inject fluids:

(i) which are brought to the surface in connection with conventional oil or natural gas production and which may be commingled with waste waters from gas plants which are an integral part of production operations, unless those waters are classified as a hazardous waste at the time of injection;

(ii) for enhanced recovery of oil or natural gas; and

(iii) for storage of hydrocarbons which are liquid at standard temperature and pressure.

(c) Class III Wells.

1. This class consists of wells which inject fluids for the extraction of minerals including:

(i) mining of sulfur by the Frasch method;

(ii) in situ production of uranium or other metals; this category includes only in situ production from ore bodies which have not been conventionally mined. Solution mining of conventional mines such as stops leaching is included in Class V; and

(iii) solution mining of minerals, such as salt or potash.

(d) Class IV Wells.

1. This class consists of injection wells used by generators of hazardous waste or of radioactive waste, by owners or operators of hazardous waste management facilities, or by owners or operators of radioactive waste disposal sites to dispose of hazardous waste or radioactive waste into the subsurface or ground water.

2. Any septic tank, well or cesspool used by generators of hazardous or radioactive waste, or by owners or operators of hazardous or radioactive waste management facilities, to dispose of fluids containing hazardous or radioactive wastes into the subsurface or ground water.

3. The subsurface emplacement of hazardous waste or radioactive waste by well injection into the subsurface or waters of the State is hereby prohibited. No permit authorizing or establishing an effluent limitation inconsistent with the foregoing shall be issued.

(e) Class V wells consists of all injection wells not included in Classes I, II, III or IV. Class V wells include, but are not limited to:

1. Air conditioning return flow wells used to return to the supply aquifer or any aquifer the water used for heating or cooling in a heat pump;

2. Cesspools including multiple dwelling, community or regional cesspools, or other devices that receive wastes which have an open bottom and sometimes have perforated sides;

3. Cooling water return flow wells used to inject water previously used for cooling;

4. Drainage wells used to drain surface fluid, primarily storm runoff, into a subsurface formation.

5. Recharge wells used to replenish the water in an aquifer;

6. Salt water intrusion barrier wells used to inject water into a fresh water aquifer to prevent the intrusion of salt water into the fresh water;

7. Sand backfill and other backfill wells used to inject a mixture of water and sand, mill tailings or other solids into mined out-portions of subsurface mines whether what is injected is a radioactive waste or not;

8. Septic system wells used to inject the waste or effluent from a multiple dwelling business establishment, community or regional business establishment septic tank;

(I) The following are not subject to the provisions of this rule:

(i) individual or single family residential waste disposal systems such as domestic cesspools or septic systems; and

(ii) non-residential cesspools, septic systems, or similar waste disposal systems if such systems are used solely for the disposal of sanitary waste and have the capacity to serve fewer than 20 persons a day.

9. Subsidence control wells (not used for the purpose of oil or natural gas production) used to inject fluids into a non-oil or gas producing zone to reduce or eliminate subsidence associated with the overdraft of fresh water;

10. Injection wells associated with the recovery of geothermal energy for heating, aquaculture and production of electric power;

11. Injection wells used for in situ recovery of lignite, coal, tar sands, and oil shale;

12. Dry wells used for the injection of wastes into a subsurface formation, other than Class I or Class IV wells.

(4) Identification of Underground Sources of Drinking Water and Exempted Aquifers.

(a) The Director may identify by narrative description, illustrations, maps, or other means, and shall protect, except where exempted under subparagraph (b) of this paragraph, as an underground source of drinking water, all aquifers or parts of aquifers which meet the definition of an "underground source of drinking water." Even if an aquifer has not been specifically identified by the Director, it shall be considered an underground source of drinking water.

(b) The Director may identify by narrative description, illustrations, maps, or other means, all aquifers or parts of aquifers which the Director proposes to designate as an exempted aquifer if it meets the following criteria:

1. It does not currently serve as a source of drinking water;

2. The total dissolved solids (TDS) is greater than 3,000 milligrams per liter; and

3. It cannot now and will not in the future serve as a source of drinking water because:

(i) it is mineral, hydrocarbon or geothermal energy producing or can be demonstrated by a permit applicant for a Class II or III operation to contain minerals or hydrocarbons, that considering their quantity and location, are expected to be commercially producible based on available information; or

(ii) it is situated at a depth or location which makes recovery of water for drinking water purposes economically or technologically impractical; or

(iii) it is so contaminated that it would be economically or technologically impractical to render the water fit for human consumption; or

(iv) it is located over a Class III mining area subject to subsidence or catastrophic collapse.

4. For Class III wells, the Director shall require an applicant for a permit which necessitates an aquifer exemption to furnish the data necessary to demonstrate that the aquifer is expected to be mineral or hydrocarbon producing. Information contained in the mining plan for the proposed project, such as a map and general description of the mining zone, general information on the mineralogy and geochemistry of the mining zone, analysis of the amenability of the mining zone to the proposed mining method and a timetable of planned development of the mining zone shall be considered by the Director in addition to the information required by Rule 391-3-6-.13(6). Approval of the aquifer exemption shall be treated as a program revision under this paragraph.

5. For Class II wells, a demonstration of commercial productibility shall be made as follows:

(i) For a Class II well to be used for enhanced oil recovery processes in a field or project containing aquifers from which hydrocarbons were previously produced, commercial productibility shall be presumed by the Director upon a demonstration by the applicant of historical production having occurred in the project area or field.

(ii) For Class II wells not located in a field or project containing aquifers from which hydrocarbons were previously produced, information such as logs, core data, formation description, formation depth, formation thickness and formation parameters such as permeability and porosity shall be considered by the Director, to the extent such information is available.

(c) No designation of an exempted aquifer shall be final until the Director has provided public notice and opportunity for a public hearing on the proposed designation and the designation has been approved by the Administrator.

(5) Prohibition of Movement of Fluid into Underground Sources of Drinking Water.

(a) No owner or operator shall construct, operate, maintain, convert, plug, abandon, or conduct any other injection activity in a manner that allows the movement of fluid containing any contaminant into underground sources of drinking water, if the presence of that contaminant may cause a violation of any primary drinking water regulation under Georgia's Rules for Safe Drinking Water, Chapter 391-3-5, or may otherwise adversely affect the health of persons. The applicant for a permit shall have the burden of showing that the requirements of this paragraph are met.

(6) Permit Application for Class I, II and III Wells.

(a) No person shall, in accordance with Section 10 of the Act, construct or operate a Class I, II, or III injection well without first having applied for, and obtained, an injection well permit from the Director. The requirements for Class II wells do not include permits for exploration, drilling and well construction for oil and/or gas production.

(b) The subsurface emplacement of hazardous waste or radioactive waste by well injection into the subsurface or waters of the State is hereby prohibited. No permit authorizing or establishing an effluent limitation inconsistent with the foregoing shall be issued.

(c) Applications for injection well permits for Class I, II or III injection wells shall be in accordance with Federal Regulations, 40 C.F.R. 144.31. Applications shall be on forms as may be prescribed and furnished from time to time by the Division and shall be accompanied by all pertinent information as the Division may request including, but not limited to, the information the Director must consider for authorizing Class I, II or III wells as set forth in the Federal Regulations, 40 C.F.R. 146.14, 146.24 and 146.34.

(d) All permit applications and reports shall be signed in accordance with the Federal Regulations, 40 C.F.R. 144.32.

(e) When a facility or activity is owned by one person but is operated by another person, it is the operator's duty to obtain a permit.

(7) Notice and Public Participation for Class I, II and III Wells.

(a) When the Division is satisfied that the application is complete, a tentative determination will be made to issue or deny the permit. If the tentative determination is to issue the permit, a draft permit will be prepared in accordance with Federal Regulations, 40 C.F.R. 124.6 and applicable State laws prior to the issuance of a public notice.

(b) Public notice of the draft permit will be prepared and circulated in a manner designated to inform interested and potentially interested persons of the proposed injection and of the proposed determination to issue or deny a permit for the proposed injection. Procedures for circulation of the public notice shall include the following:

1. Within the geographical area of the proposed injection the public notice shall be circulated by at least one of the following: posting in the post office or other public buildings near the premises of the applicant in which the injection is located or posting at the entrance of the applicant's premises or nearby; and publication in one (1) or more newspapers of general circulation in the area affected by the injection;

2. Posting of the public notice in the Office of the Secretary of State;

3. A copy of the public notice shall be mailed to the permit applicant at the Division office in Atlanta;

4. Mailing of the public notice to any person or group upon written request including persons solicited from area lists from past permit proceedings. The Division shall maintain a mailing list for distribution of public notices and fact sheets. Any person or group may request that their names be added to the mailing list. The request should be in writing to the Division office in Atlanta and shall be renewed in December of each year. Failure to renew the request shall result in the removal of such name from the mailing list;

5. The Division shall provide a period of not less than thirty (30) days following the date of the public notice in which interested persons may submit their written views on the tentative determination with respect to the draft Injection Well Permit. All written comments submitted during the thirty (30) day comment period will be retained by the Division and considered in the final determination with respect to the permit application and shall be responded to in accordance with Federal Regulations, 40 C.F.R. 124.17. The comment period may be extended at the discretion of the Director;

6. The contents of the public notice will be in accordance with Federal Regulations, 40 C.F.R. 124.10;

7. The Division will prepare and distribute a fact sheet in accordance with Federal Regulations, 40 C.F.R. 124.8 and applicable State laws. A copy of the fact sheet will be available for public inspection at the Division office in Atlanta. Any person may request in writing a copy of the fact sheet and it will be provided. The Division shall add the name of any person or group upon request to the mailing list to receive copies of fact sheets;

8. The Division will prepare and distribute a statement of basis in accordance with Federal Regulations, 40 C.F.R. 124.7;

9. Copies of the draft permit shall be transmitted to the Regional Administrator for review and comments in such manner as the Director and Regional Administrator shall agree.

(c) The Director shall provide an opportunity for an applicant, any affected state or interstate agency, the Regional Administrator or any other interested agency, person or group of persons to request a public hearing with respect to an Injection Well Permit. Any such request for public hearing shall be filed within the 30 day comment period prescribed in subparagraph 391-3-6.13(7)(b)5. and shall indicate the interest of the party filing such a request, the reasons why a hearing is requested, and those specific portions of the application or information to be considered at the public hearing. The Director shall hold a hearing if he determines that there is sufficient public interest in holding such a hearing or if the Director desires to clarify a permitting decision:

2. The Director may require as a permit condition that injection pressure be so limited that pressure in the injection zone does not exceed hydrostatic pressure at the site of any improperly completed or abandoned well within the area of review. This pressure limitation shall satisfy the corrective action requirement. Alternatively, such injection pressure limitation can be part of a compliance schedule and last until all other required corrective action has been taken.

3. When setting corrective action requirements for Class III wells the Director shall consider the overall effect of the project on the hydraulic gradient in potentially affected underground sources of drinking water, and the corresponding changes in potentiometric surface(s) and flow direction(s) rather than the discrete effect of each well. If a decision is made that corrective action is not necessary based on the determinations above, the monitoring program required in Federal Regulations, 40 C.F.R. 146.33(b) shall be designed to verify the validity of such determination.

(d) The permittee shall report any monitoring or other information which indicates any contaminant that may cause an endangerment of a fresh water zone or underground source of drinking water or any noncompliance with a permit condition or malfunction of the injection system which may cause fluid migration into or between fresh water zones or underground sources of drinking water. Any noncompliance with a permit condition or a malfunction of the injection information shall be reported by telephone to the Director within twenty four (24) hours from the time the permittee becomes aware of the noncompliance and a written submission within five (5) days of the oral notification. The written submission shall contain a description of the noncompliance and its cause, the period of noncompliance including exact dates and times, the corrective action taken to reduce or eliminate the noncompliance, and the steps planned to prevent a recurrence of the noncompliance.

9. Hydraulic connections with underground sources of drinking water.

(10) Criteria and Standards Applicable to Injection Wells.

(a) Each permittee shall comply with the criteria and standards for underground injection control for Class I, II and III injection wells as set forth in the Federal Regulations, 40 C.F.R. 146.12, 146.22 and 146.32 and as may be additionally prescribed by the Director.

(b) All Class I wells shall be sited in such a fashion that they inject into a formation which is beneath the lowermost formation containing, within a two (2) mile radius of the well bore or greater if determined by the Director, an underground source of drinking water.

(c) All Class II wells shall be sited in such a fashion that they inject into a formation which is separated from an underground source of drinking water by a confining zone that is free of known open faults or fractures within the area of review.

(d) Operating, monitoring and reporting requirements shall be in accordance with Federal Regulations, 40 C.F.R. 146.13, 40 C.F.R. 146.23 and 40 C.F.R. 146.33 and as may be additionally prescribed by the Director.

(11) Permit Application for Class V Wells.

(a) No person shall, after the effective date of this rule, construct or operate a Class V injection well for the injection of contaminants or fluids unless authorized by a permit issued by the Director.

(b) Class V wells apply to all injection wells not included in Classes I, II, III or IV. Class V wells are defined in subparagraph 391-3-6-.13(3)(e).

(c) Any person desiring to construct a Class V well shall apply in writing to the Director for an injection well permit. Any persons owning or operating any well meeting the definitions of a Class V well prior to the effective date of this rule shall submit an application and information to the Director no later than July 1, 1985. The application shall include, but need not be limited to, the following information:

1. Name, mailing address and location of the facility;

2. Name and address of the owner and operator, if different than the facility;

3. A map showing the location of each existing or proposed injection well at the facility;

4. A diagram showing the details of the construction existing injection well(s) and the proposed construction of any proposed injection well(s).

5. Proposed or existing injection rate and injection pressure or gravity flow;

6. The chemical, physical and radioactive characteristics of the fluid injected or to be injected; and

7. Signature of the applicant.

(d) Upon receipt of the application, the Director shall"

1. Determine if the facility is a Class V well.

2. Determine if additional information is required to evaluate the facility.

3. Assess the potential adverse affect upon the underground source of drinking water.

4. Determine any construction and operating requirements to protect the underground drinking water source.

(e) After an evaluation of the application, the Director shall:

1. Issue a permit in the form of a letter containing any special permit conditions as may be necessary such as well construction, operation, monitoring and reporting. The permit shall be for a period not to exceed ten (10) years.

2. If the Director determine that the facility is not a Class V well, he shall require the applicant to submit a permit application in accordance with Rule 391-3-6-.13(6) of this Chapter. The application processing and permit issuance shall be in accordance with Rules 391-3-6-.13(6) and 391-3-6-.13(7).

3. Deny the issuance of a permit.

(f) No person shall be issued a permit to operate a Class V well where the movement of fluid, in the judgment of the Director, may cause a violation of any primary drinking water rule under the Georgia Rules for Safe Drinking Water, Chapter 391-3-5, or which may adversely affect the health of persons.

1. If at any time the Director learns that a permitted Class V well may cause a violation under this paragraph, the Director shall:

(i) order the injector to take such actions as may be necessary to prevent the violation, including where required closure of the injection well; or

(ii) take enforcement action.

2. Notwithstanding any other provisions of this paragraph, the Director may take emergency action upon receipt of information that a contaminant which is present in, or is likely to enter a pubic water system, may present an imminent and substantial endangerment to the health of persons.

(g) Any persons operating an existing Class V well and injecting fluids after the effective date of this rule shall be authorized to continue the operation under conditions of permits or other authorization in effect prior to the effective date of this rule, provided an application is submitted within twelve months after the effective date of this rule. An exception to this rule is that any person injecting fluids that may endanger an underground source of drinking water shall notify the Director within thirty (30) days of the effective date of this rule.

(12) Standards and Criteria Applicable to Class V Wells.

(a) No person shall construct a Class V well without first having applied for and obtained a permit from the Director.

(b) Class V wells shall be sited so that the injection fluid does not contaminate an underground source of drinking water.

(c) Class V well construction.

1. The person constructing the well shall be a licensed water well contractor in the State of Georgia in accordance with the provisions of the Water Well Standards Act of 1976; Georgia Laws 1977, p. 1509, (Ga. Code Ann. Sec. 84-7506).

2. Casing shall extend at least five (5) feet into the injection zone unless otherwise specified by the Director.

3. The annular space around the entire length of the casing shall be grouted and sealed to prevent pollution by surface waters, other formation fluids or pollutants into the formation above the injection zone.

4. Special construction requirements may be specified by the Director or the permit to prevent contamination of an underground source of drinking water.

(d) A permit may be transferred to any person provided the permittee notifies the Director in writing at least 30 days in advance of the proposed transfer date and the transfer is approved by the Director.

(e) A permit issued by the Director may include permit conditions for the monitoring, testing and reporting of the injection facility.

(f) Plugging and Abandonment.

1. The Director may order a Class V well plugged and abandoned by the owner when it no longer performs its intended purpose, or when it is determined to endanger underground sources of drinking water.

2. It shall be the owner's responsibility to have any injection well plugged and abandoned by the water well contractor before removing the drilling equipment from the site if the well is not completed for its intended purpose.

3. It shall be the owner's responsibility to have any exploratory and/or test well(s) constructed for the purpose of obtaining information on an injection well site, plugged and abandoned by the water well contractor.

4. The entire depth of the well shall be completely filled with cement grout, which shall be introduced into the well by a pipe which extends to the bottom of the well and is raised as well is filled, unless otherwise approved by the Director.

(13) Mechanical Integrity.

(a) An injection well has mechanical integrity if:

1. There is no detectable leak in the casing, tubing or packer; and

2. There is no detectable fluid movement into an underground source of drinking water through vertical channels adjacent to the injection well bore.

(b) One of the following methods must be used to evaluate the absence of detectable leaks under subparagraph 391-3-6-.13(13)(a)1:

1. Monitoring of annulus pressure; or

2. Pressure test with liquid or gas.

(c) The methods used to determine the absence of detectable fluid movement into an underground source of drinking water shall be the results of a temperature or noise log.

(d) In conducting and evaluating the tests for mechanical integrity, the owner or operator and the Director shall apply methods and standards generally accepted in the industry. When the owner or operator reports the results of mechanical integrity tests to the Director, the report shall include a description of the test(s) and method(s) used. The Director, in making an evaluation shall review monitoring and other test data submitted since the previous evaluation.

(14) Plugging and Abandoning Class I, II and III Wells.

(a) The permittee shall inform the Director in writing of the permittee's intent to abandon an injection well at least forty-five (45) working days prior to the abandonment.

(b) The permittee shall be responsible for the plugging of any injection well that is abandoned.

(c) Wells shall be plugged with cement in a manner which will not allow the movement of fluids either into or between underground sources of drinking water.

(d) The placement of the cement shall be accomplished by the Balance Method, Dump Bailer Method or Two-Plug Method.

(e) The well to be cemented shall be in a state of static equilibrium with the mud weight equalized top to bottom, either by circulating the mud in the well at least once or by a comparable method prescribed by the Director, such as the use of a packer, prior to the placement of the cement plugs.

(f) The Director may require ground water monitoring after well abandonment if contamination of an underground source of drinking water is suspected.

(g) The permittee shall certify to the Director within thirty (30) days of plugging that the injection well was plugged according to permitted procedures.

(15) Emergency Action. If at any time the Director learns that an injection well may cause or has caused the movements of any fluids containing contaminants into an underground source of drinking water or otherwise adversely affect the water quality or adversely affect the public health, the Director shall:

(a) Order the injector to cease the operation and take such actions as may be necessary to prevent the violation;

(b) Order the injector to take such actions as may be necessary to correct the violation;

(c) Take enforcement action; or

(d) Take emergency action upon receipt of information that a contaminant is likely to enter a public water system and present an imminent and substantial endangerment to the health of the public.

Authority O.C.G.A. Sec. 12-5-23 (Ga. L. 1957) p. 629, Sec. 4; Ga. L. 1964, p. 416, Secs. 5, 24; Ga. L. 1966, p. 316, Sec 1; Ga. L. 1972, p. 1015, Secs. 1517, 1534; Ga. L. 1972 p. 1266, Sec. 1; Ga. L. 1974, p. 599, Secs. 6, 7; Ga. L. 1977, p. 368, Sec. 2. Administrative History: Original Rule entitled "Underground Injection Control" was filed o Dec. 9, 1983, Eff. Dec. 29, 1983. Amended: E.R. 391-3-6 was filed May. 1,1996, eff. April 25, 1996, the date of adoption to remain in effect for a period of 120 days or until the effective date of a permanent Rule covering the same subject matter superseding this ER, as specified by the Agency. Amended: F. July 10, 1996. Eff. July 30, 1996.