PURPOSE: This regulation controls the construction and operations of mineral resources injection/production wells. (1) Permits—General.

1. (A) This rule applies to Class III injection/production wells used for the extraction of minerals including:

   1. 1. Sulfur mining by the Frasch process;
   2. 2. In-situ production of uranium or other

metals. This category includes only in-situ production from ore bodies which have not been conventionally mined;

1. 3. In-situ combustion of fossil fuel; fos -

sil fuels include coal, tar sands, oil shale, and any other fossil fuel which can be mined by this process; and

1. 4. Solution mining of salts or potash.
2. (B) This rule does not apply to wells used by generators of hazardous wastes or of radioactive wastes, 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 or above any underground formation. These types of wells are expressly forbidden under section 577.155, RSMo.
3. (C) All persons who build, erect, alter, replace, operate, use, or maintain existing or proposed Class III injection/production wells shall apply to the department for applicable permits using application forms provided by the department.
4. (D) Nothing in these regulations shall pre - vent the department from taking action where the department finds that any activity that places, or permits to be placed, a water con - taminant where it is reasonably certain to cause pollution of any waters of the state, or the activity otherwise violates Chapter 644, RSMo, the Missouri Clean Water Law, or these regulations.

5. (E) Any information submitted to the department pursuant to these regulations may be claimed as confidential by the applicant. Any claim must be asserted at the time of submission in the manner prescribed on the application form or instructions or, in the case of other submissions, by stamping the words confidential business information on each page containing the information. If no claim is made at the time of submission, the department may make the information available to the public without further notice. Claims of confidentiality for the following information will be denied:

   1. 1. The name and address of any permit

applicant or permittee; and

1. 2. Information which deals with the

existence, absence or level of contaminants in drinking water.

1. (F) The permittee shall give advance notice to the director of any planned changes in the permitted facility or activity which may result in noncompliance with permit requirements.
2. (G) Applicants shall keep records of all data used to complete permit applications and any supplemental information submitted under these regulations for a period extending from the date the application is signed to the date the permit expires for at least three (3) years.

1. (2) Application.

   1. (A) An application for an operating permit shall be made for each injection/production well and shall include each of the following items. The application may be supplemented with copies of information submitted for other federal or state permits.

      1. 1. All items listed in 10 CFR 144.31(e);
      2. 2. Description of the process that will be

used for the mineral extractions, including injection/withdrawal procedures;

1. 3. Estimated depth of the well, casing

lengths and weights, intervals to be cemented, and related well construction data as recommended by the office of the state geologist;

1. 4. Maximum and average volume of

injected fluids and injection pressure that will be used on a daily basis;

1. 5. Appropriate application fee as listed

in 10 CSR 20-6.011;

1. 6. Recommendation and justification on

the number and location of sampling wells by a registered professional engineer or a qualified geologist as defined by sections 256.501 and 256.503, RSMo;

1. 7. Where injection is into a formation

which contains water with less than ten thousand milligrams per liter (10,000 mg/l) total dissolved solids (TDS), monitoring wells shall be:

1. A. Completed into the injection zone

and into any underground sources of drinking water (USDW) above the injection zone which could be affected by the mining operation;

1. B. Located in a fashion as to detect

any excursions of injection fluids, process byproducts, or formation fluids outside the mining area or zone; and

1. C. Located as not to be physically

affected by a subsidence or catastrophic collapse;

1. 8. Where injection is into a formation

which does not contain water with less than ten thousand (10,000) mg/l TDS, no moni - toring wells are necessary in the injection zone;

1. 9. Where the injection wells penetrate

an underground source of drinking water (USDW) in an area subject to subsidence or catastrophic collapse, an adequate number of monitoring wells shall be:

1. A. Completed into the USDW to

detect any movement of injected fluids, process by-products, or formation fluids into a USDW; and

1. B. Located as not to be physically

affected by a subsidence or catastrophic collapse;

1. 10. In determining the number, location,

construction and frequency of sampling of the monitoring wells, the following criteria shall be considered:

1. A. Population relying on the USDW

affected or potentially affected by the injec - tion operation;

1. B. Proximity of the injection opera -

tion to points of withdrawal of drinking water;

1. C. Local geology and hydrology;
2. D. Operating pressures and whether a

negative pressure is being maintained;

1. E. Nature and volume of the injected

fluid, the formation water, and the process by-products; and

1. F. Injection well density;
2. 11. Map(s) describing an area of review

for each Class III injection/production well or group of wells, as determined by a registered professional engineer or a qualified geologist as defined by sections 256.501 and 256.503, RSMo. The area of review shall be that area the radius of which is determined by the lateral distance from a Class III injection/production well or perimeter of a group of wells in which the pressure in the injection zone may cause the migration of injection or formation, or both, fluid into an USDW or into an improperly constructed, plugged, or abandoned well or test hole.

1. A. The radius of the area of review

may be calculated using a mathematical model (for example, modified Thesis equation) and shall be calculated for an injection time period at least equal to the expected life of the well(s). The owner or operator must demonstrate to the director that the mathematical model used and the calculated area of review are appropriate for the known hydrologic properties of the underlying formations.

1. B. A fixed radius around the well or

the perimeter of a group of wells of not less than one-half (1/2) mile may be used. In determining the fixed radius, the following factors shall be taken into consideration: chemistry of injected and formation fluids, hydrogeology, population and groundwater use and dependence, and historical practices in the area.

1. C. If the area of review is determined

by a mathematical model pursuant to sub - paragraph (2)(B)8.A. the permissible radius is the result of the calculation even if it is less than one-half (1/2) mile.

1. D. Nothing in this section shall pre-

vent the director from imposing alternate areas of review when geologic or hydrologic conditions render a calculated or fixed area a potential threat to an underground source of drinking water;

1. 12. Submit with the application a

mapped and tabulated inventory of all known water supply, injection/production, abandoned and test wells, including field names or numbers and locations of the wells, public water systems, within the area of review and a separate tabulation of all the wells, which penetrate the injection zone list ing each well’s type, construction method, date drilled, location, depth, and record of plugging or completion, or both, including a description of all corrective action(s) proposed to be performed to render wells penetrating the injection zone sealed, plugged, or otherwise impervious to the migration of fluids into or between well bores, USDWs, or different aquifers. The applicant is responsible for the inventory and corrective action requirements of this section and shall extend every reasonable effort to locate all wells within the area of review of the applicant well(s);

1. 13. A plan for plugging and abandon-

ment. Where the plan meets the requirements of this paragraph, the director shall incorporate it into the permit as a condition. Where the director’s review of an application indicates that the permittee’s plan is inadequate, the director shall require the applicant to revise the plan, prescribe conditions meeting the requirements of this paragraph or deny the application. For purposes of this paragraph, temporary intermittent cessation of injection operations is not abandonment;

1. 14. Prior to granting approval for the

plugging and abandonment of a Class III well, the director shall consider the following information:

1. A. The type and number of plugs to

be used;

1. B. The placement of each plug,

includ ing the elevation of the top and bottom;

1. C. The type, grade, and quantity of

cement to be used; and

1. D. The method of placement of the

plugs;

1. 15. The permittee is required to main-

tain financial responsibility and resources to close, plug, and abandon the underground injection operation in a manner prescribed by the director. The permittee must show evidence of financial responsibility to the direc - tor by the submission surety bond or other adequate assurance such as financial statements or other materials acceptable to the director; 10 CSR 20-6

1. 16. Maps and cross-sections indicating

the vertical limits of all USDWs within the area of review, their position relative to the injection formation, and the direction of water movement, where known, in every under ground source of drinking water which may be affected by the proposed injection;

1. 17. Maps and cross-sections detailing

the geologic structure of the local area;

1. 18. Generalized map and cross-sections

illustrating the regional geologic setting;

1. 19. Qualitative analysis and ranges in

concentrations of all constituents of injected fluids. The applicant may request confiden - tiality as specified in subsection (1)(E). If the information is proprietary, an applicant, in lieu of the ranges in concentrations, may choose to submit maximum concentrations which shall not be exceeded. In this case the applicant shall retain records of the undis - closed concentrations and provide them upon request to the director as part of any enforcement investigation;

1. 20. Proposed formation testing program

to obtain the information required by paragraph (2)(H)4.;

1. 21. Proposed stimulation program;
2. 22. Schematic or other appropriate

drawings of the surface and subsurface construction details of the well;

1. 23. Plans, including maps, for meeting

the monitoring requirements of subsection (4)(D);

1. 24. Expected changes in pressure, native

fluid displacement, and direction of movement of injection fluid;

1. 25. Contingency plans to cope with all

shut-ins or well failures so as to prevent the migration of contaminating fluids into the USDW;

1. 26. A certificate that the applicant has

assured, through a performance bond or other appropriate means, the resources necessary to close, plug, or abandon the well as required by paragraph (2)(B)19.;

1. 27. The corrective action proposed to be

taken under paragraph (2)(B)18.;

1. 28. Where the injection zone is a forma -

tion which is naturally water-bearing, the fol - lowing information concerning the injection zone shall be determined or calculated for new Class III wells or projects:

1. A. Fluid pressure;
2. B. Fracture pressure; and
3. C. Physical and chemical characteris -

tics of the formation fluids;

1. 29. Where the injection formation is not

a water-bearing formation, only the informa - tion in subparagraph (2)(A)28.B. must be submitted;

1. 30. Where the permittee becomes aware

that s/he failed to submit any relevant facts in a permit application, or has submitted incor - rect information in a permit application or in any report to the director, the permittee shall promptly submit the facts or information; and

1. 31. Data sufficient to allow the depart-

ment to carry out aquifer exemption proce - dures under the Safe Drinking Water Act, UIC program. The information shall be sufficient to demonstrate that the aquifer is expected to be mineral or hydrocarbon pro - ducing. Information for the proposed project, such as a map and general description of the mining zone, general information on the min - eralogy and geochemistry of the mining zone, analysis for the amenability of the mining zone to the proposed mining method, and a timetable of planned development of the min - ing zone shall be considered by the director.

1. (B) All applications must be signed as follows:

   1. 1. For a corporation—by an officer of at

least the level of plant manager;

1. 2. For a partnership or sole proprietor-

ship—by a general partner or the proprietor; or

1. 3. For a municipal, state, federal, or

other public facility—by either a principal executive officer or ranking public official or his/her designee.

1. (C) All other reports required by the department shall be signed by a person desig - nated in subsection (2)(B) of this rule or a duly authorized representative, where—

   1. 1. The representative so authorized is

responsible for the overall operation of the facility from which the injection/withdrawal occurs; and

1. 2. The authorization is made in writing

by a person designated in subsection (2)(B) of this rule and is submitted to the director.

1. (D) Any changes in the written authoriza - tion which occur after the issuance of a per - mit shall be reported to the department by submitting a new written authorization which meets the requirements of subsection (2)(C) of this rule.
2. (E) If an application is incomplete or otherwise deficient, the applicant shall be notified of the deficiency and processing of the application may be discontinued until the applicant has corrected all deficiencies.
3. (F) Any person signing a document under subsection (2)(B) or (C) shall make the following certification: I certify under penalty of law that I have personally examined and am familiar with the information submitted in this document and all attachments and that, based on my inquiry of those individuals immediately responsible for obtaining the information, I believe that the information is true, accurate, and complete. I am aware that there are significant penalties for submitting false infor mation, including the possibility of fine and imprisonment.
4. (G) Mail applications to Water Pollution Control Program, PO Box 176, Jefferson City, MO 65102.

5. (H) Prior to granting approval for the operation of a Class III well, the director shall consider the following information:

   1. 1. All available logging and testing data

on the well;

1. 2. A satisfactory demonstration of

mechanical integrity;

1. 3. The anticipated maximum pressure

and flow rate at which the permittee will operate;

1. 4. The results of the formation testing

program;

1. 5. The actual injection procedures; and
2. 6. The status of corrective action on

defective wells in the area of review.

1. (3) Operating Permits.

   1. (A) In order to obtain an operating permit for Class III injection/production wells, application for an operating permit shall be submitted to the department in accordance with the timeframes listed in section 644.051, RSMo and 10 CSR 20-6.010.

   2. (B) The director may issue a permit on an area basis, rather than for each well individ - ually, provided that the permit is for injection wells—

      1. 1. Described and identified by location

in permit application(s) if they are existing wells, except that the director may accept a single description of wells with substantially the same characteristics;

1. 2. Located within the same well field,

facility site, reservoir, project, or similar unit in the same state;

1. 3. Operated by a single owner or opera -

tor;

1. 4. Area permits specify—

   1. A. The area within which under-

ground injections are authorized; and

1. B. The requirements for construction,

monitoring, reporting, operation, and abandonment for all wells authorized by the permit.

1. 5. Area permits may authorize the per-

mittee to construct and operate, convert, or plug and abandon wells within the permit area provided—

1. A. The permittee notifies the director

at a time as the permit requires;

1. B. The additional well satisfies the

criteria in subsection (3)(B) and meets the requirements specified in the permit under paragraph (3)(B)4; and

1. C. The cumulative effects of drilling

and operation of additional injection wells are considered by the director during evaluation of the area permit application and are acceptable to the director.

1. (C) If the director determines that any well constructed pursuant to paragraph (3)(B)5. does not satisfy any of the requirements of subparagraphs (3)(B)5.A. and B., the director may modify or terminate the permit or take enforcement action. If the director deter - mines that cumulative effects are unaccept - able, the permit may be modified or terminated.

1. (4) Terms and Conditions of Permits.

   1. (A) The following shall be incorporated as terms and conditions of all permits:

      1. 1. All operations shall be consistent with

the terms and conditions of the permit;

1. 2. The permit may be modified or

revoked after reasonable notice for causes including, but not limited to:

1. A. Material and substantial alterations

or additions to the permitted facility or activ - ity which occurred after permit issuance, which justify the application of permit condi - tions that are different or absent in the exist - ing permit;

1. B. New information received by the

director, including information indicating that cumulative effects on the environment are unacceptable;

1. C. The standards or regulations on

which the permit was based have been changed by promulgation of amended standards or regulations or by judicial decision after the permit was issued;

1. D. Good cause, as determined by the

director, exists for modification of a compli - ance schedule, such as an act of God, strike, flood, or materials shortage or other events over which the permittee has little or no con - trol and for which there is no reasonably available remedy; and

1. E. Notification of a proposed transfer

of the permit has been received by the direc - tor;

1. 3. Suitability of the facility will not be

considered at the time of permit modification or revocation and reissuance unless new information or standards indicate that a threat to human health or the environment exists which was unknown at the time of permit issuance;

1. 4. The permit may be issued for a peri-

od of up to five (5) years in accordance with section 644.051, RSMo and 10 CSR 20- 6.010. If the permittee wishes to continue an activity regulated by the permit after the expiration date of the permit, the permittee must apply for and obtain a new permit prior to the expiration date of the permit in effect;

1. 5. The director may terminate a permit

during its term or deny a permit renewal application for the following causes:

1. A. Noncompliance by the permittee

with any condition of the permit;

1. B. The permittee’s failure in the appli -

cation or during the permit issuance process to disclose fully all relevant facts or the per - mittee’s misrepresentation of any relevant facts at any time; or

1. C. A determination that the permitted

activity endangers human health or the envi - ronment and can only be regulated to acceptable levels by permit modification or termina - tion;

1. 6. For the purpose of inspecting for

compliance with the Clean Water Law and these regulations, authorized representatives of the department shall be allowed by the per - mittee, upon presentation of credentials and at reasonable times, to—

1. A. Enter upon permittee’s premises in

which Class III injection/production well is located or in which any records are kept under terms and conditions of the permit;

1. B. Have access to or copy, any records

to be kept under terms and conditions of the permit;

1. C. Inspect any sampling wells, moni -

toring equipment, or method listed in the permit; and

1. D. Sample for permit compliance;
2. 7. Facility expansions, production

increases or process modifications which will result in a new substantially different operation must be reported sixty (60) days before the facility or process modification begins. Notification may be accomplished by applica - tion for a new permit or by submission of notice to the department;

1. 8. Copies of well location, driller’s logs,

sample logs, casing schedule, volume of water, temperature, water quality, cement records, and other information developed or determined for the completed installation shall be sent to the Missouri Department of Natural Resources, Water Pollution Control Program and to the Missouri Department of Natural Resources, Division of Geology and Land Survey;

1. 9. Measure and record maximum and

average injection/withdrawal volumes and pressures semi-monthly;

1. 10. Measure and record total dissolved

solids semi-monthly for each injection/production well and each monitor ing well;

1. 11. Submit a quarterly report to the

agencies listed in paragraph (4)(A)8. which contains the following information:

1. A. Volume and pressure of fluids

injected and withdrawn; and

1. B. Copies of water quality analyses

performed; and

1. 12. Information on compliance and non -

compliance shall be submitted by the permittee as follows:

1. A. No later than thirty (30) days fol-

lowing each compliance schedule date, submit in writing compliance or noncompliance with, or any progress reports on, interim and final requirements contained in any compliance schedule pertaining to this permit.

1. B. Within twenty-four (24) hours of

becoming aware of the circumstances, report orally any noncompliance which may endanger health or the environment, including information which indicates that any contaminant may cause an endangerment to a USDW, or noncompliance with a permit condition or malfunction of the injection system which may cause fluid migration into or between USDWs.

1. C. Within five (5) days of becoming

aware of the circumstances, report in writing a description of the noncompliance and its cause, the peri od of noncompliance, including exact dates and times, and if the noncompliance has not been corrected, the anticipated time it is expected to continue, and steps taken or planned to reduce, eliminate and prevent reoccurrence of the noncompliance; and

1. D. With the next scheduled monitor-

ing report, submit in writing all instances of noncompliance not reported under other sections of this rule, including the information listed in subparagraph (4)(A)12.A. through C.

1. (B) No owner or operator shall construct, operate, maintain, convert, plug, or abandon any Class III injection/production well or conduct any other activity in a manner that allows the movement of fluid containing any contaminant into USDWs. The applicant for a permit shall have the burden of showing that the requirements of this section are met through a demonstration of mechanical integrity by completing each of the following:

   1. 1. Demonstrate the absence of signifi-

cant leaks utilizing at least one (1) of the following procedures: a pressure test with liquid or gas; monitoring of annulus pressure in wells injecting at a positive pres sure following an initial pressure test; or any other test(s) that the state geologist considers effective.

1. 2. Demonstrate the absence of signifi-

cant migration of fluids in channels adjacent to the well bore utilizing at least two (2) of the following procedures: noise logs, temperature surveys, cement records demonstrating the presence of adequate cement to prevent migration (used only if the nature of casing 10 CSR 20-6

precludes the use of noise logs or temperature surveys); or any other test(s) approved by Environmental Protection Agency (EPA) and that the state geologist considers effective.

1. 3. Demonstrate mechanical integrity

before operations may begin by submitting documentation of successful demon strations of mechanical integrity, or by allowing department personnel to witness the demonstrations. Scheduling of witnessed demonstrations of mechanical integrity may be at the reasonable conve nience of the applicant. Nothing in this rule will prevent the director from rescheduling a test at a reasonable time convenient to the applicant when necessary to allow depart ment personnel to witness the test(s).

1. (C) For Class III injection/production wells—if any water quality monitoring of any USDW indicates the movement of any contaminant into the USDW, the director shall prescribe the additional requirements for construction, corrective action, operation, monitoring or reporting (including closure of the injection/production well) as are necessary to prevent this movement. These additional requirements shall be imposed by modifying the permit in accordance with this regulation or the permit may be terminated.

2. (D) Monitoring requirements, at a minimum, shall specify—

   1. 1. Monitoring of the nature of injected

fluids with sufficient frequency to yield representative data on its characteristics. Whenever the injection fluid is modified to the extent that the analysis completed in accordance with paragraph (2)(A)19. is incorrect or incomplete, a new analysis in accordance with paragraph (2)(A)19. shall be provided to the director;

1. 2. Monitoring of injection pressure and

either flow rate or volume semi-monthly, or metering and daily recording of injected and produced fluid volumes as appropriate;

1. 3. Monitoring of the fluid level in the

injection zone semi-monthly where appropriate and monitoring of the parameters chosen to measure water quality in the monitoring wells in accordance with paragraph (4)(D)1. semimonthly; and

1. 4. Quarterly monitoring of wells in

accordance with paragraph (4)(E)1.

1. (E) Reporting requirements, at a minimum, shall include:

   1. 1. Quarterly reporting to the director on

required monitoring;

1. 2. Results of mechanical integrity tests

and any other periodic test required by the department reported with the first regular quarterly report after the completion of the test; and

1. 3. Monitoring may be reported on a pro-

ject or field basis rather than individual well basis where manifold monitoring is used.

1. (5) Prohibitions.

   1. (A) No permit shall be issued:

      1. 1. Where the terms and conditions of the

permit do not comply with applicable guidelines or require ments of the Clean Water Law and corre sponding regulations or relevant federal laws.

1. 2. Where the permit conditions do not

ensure compliance with the applicable water quality requirements of any other affected states.

1. 3. For the dis charge of any pollutant not

necessary to the extraction process, except thermal dis charges; those produced pollutants contained in the formation water may be reinjected into a formation of the same TDS concentration.

1. 4. For the discharge of any radiological,

chemical, or bio logical warfare agent or radioactive waste.

1. 5. For the con struction or operation of a

new injection/production well which would degrade the usefulness of water withdrawn from earlier permitted wells.

1. 6. For a well utilizing annular injection

or production.

1. (B) No well shall be operated so that fluid pressures in the injection zone exceed the fracture pressure calculated or known for that formation.

2. (C) New injection wells may not com - mence injection until construction is com - plete and—

   1. 1. The permittee has submitted notice of

completion of construction to the director and—

1. A. The director has inspected or oth-

erwise reviewed the new injection well and finds it is in compliance with the conditions of the permit; or

1. B. The permittee has not received

notice from the director of the intent to inspect or otherwise review the new injection well within thirteen (13) days of the date of the notice in paragraph (5)(C)1. of this rule, in which case prior inspection or review is waived and the permittee may commence injection.

1. (I) No operation shall commence

until corrective actions outlined in paragraph (2)(A)12. and those required by the department have been completed.

1. (6) Class III Injection/Production Well Construction Requirements.

   1. (A) All new injection/production wells shall meet each of the following conditions:

      1. 1. Wells are cased and cemented to pre-

vent the migration of fluids into or between USDWs or potential sources of drinking water;

1. 2. The casing and cement used in con-

struction of each newly drilled well is designed for the life of the well;

1. 3. Consider the following factors when

determining and specifying casing and cementing requirements:

1. A. Depth to the injection/production

zone;

1. B. Injection pressure, external pres-

sure, internal pressure, axial loading;

1. C. Borehole size;
2. D. Size and grade of all casing strings

including wall thickness, diameter, nominal weight, length, joint specification, and construction material;

1. E. Corrosiveness of injection/produc-

tion and formation fluids or combinations;

1. F. Lithology of injection/production

and confining zones; and

1. G. Type and grade of cement.
2. (B) Each well or group of wells utilizing a positive displacement pump shall be equipped with both high and low safety switches which will shut down the pump in case of pressure increase over the authorized pressure or sudden pressure loss.
3. (C) Appropriate logs and other tests shall be conducted during the drilling and construction of new injection/production wells. A descriptive report shall be prepared by a qualified log analyst and submitted to the director. The logs and test appropriate to each type of well shall be determined on the intended function, depth, construction and other characteristics of the well, availability of similar data in the area of the drilling site and the need for additional information that may arise from time-to-time as the construction of the well progresses. At a minimum, the logs and test shall include deviation checks conducted on all holes where pilot holes and reaming are used at sufficiently frequent intervals to assure that vertical avenues for fluid migration in the form of diverging holes are not created during drilling.

1. (7) Permits Transferable.

   1. (A) Subject to section (3), an opening permit may be transferred upon submission to the department of an application to transfer signed by a new owner. Until that time as the permit is officially transferred, the original permittee remains responsible for complying with the terms and conditions of the existing permit.
   2. (B) Within thirty (30) days of receipt of the application the department, shall notify the new applicant of the intent to revoke and reissue or transfer the permit.

2. (8) Plugging and Abandonment.

   1. (A) Prior to abandoning Class III wells the well shall be plugged with cement in a manner which will not allow the movement of fluids between one (1) aquifer or formation and another. The director may allow Class III wells to use other plugging materials if s/he is satisfied that the materials will prevent movement of fluids into or between USDWs.

   2. (B) Placement of the cement plugs shall be accomplished by one (1) of the following:

      1. 1. The balance method;
      2. 2. The dump method;
      3. 3. The two (2)-plug method; or
      4. 4. An alternative method approved by

the director which will reliably provide a comparable level of protection.

1. (C) The well to be abandoned 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 prior to the placement of the cement plug(s).
2. (D) The director shall prescribe aquifer cleanup and monitoring where s/he deems it necessary and feasible to insure adequate protection of USDWs.
3. (E) The permittee shall notify the director at the times as the permit requires before conversion or abandonment of the well or in the case of area permits before closure of the project. AUTHORITY: section 644.026, RSMo 2016.* Original rule filed Nov. 9, 1983, effective June 1, 1984. Amended: Filed June 13, 2018, effective Feb. 28, 2019.

*Original authority: 644.026, RSMo 1972, amended 1973, 1987, 1993, 1995, 2000, 2012, 2014.