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PIT Order Exceptions

STATE OF NEW MEXICO
ENERGY AND MINERALS DEPARTMENT
OIL CONSERVATION DIVISION

TONEY ANAYA
GOVERNOR

M E M O R A N D U M

TO: OCD STAFF, ATTORNEYS PRACTICING BEFORE
THE DIVISION, APPLICANTS

FROM: R. L. STAMETS, DIRECTOR

SUBJECT: HEARINGS FOR EXCEPTIONS TO ORDER NO. R-3221,
SOUTHEAST NEW MEXICO, "NO-PIT" ORDER

DATE: OCTOBER 22, 1985

Background

On May 1, 1967, the Oil Conservation Commission entered Order No. R-3221 which prohibits disposal of water produced in conjunction with the production of oil or gas on the surface of the ground, or in any other place or manner which will constitute a hazard to fresh water supplies in the area encompassed by Lea, Eddy, Chaves, and Roosevelt Counties. The order was amended by Order No. R-3221-B on July 25, 1968, to define a large area in the vicinity of Clayton Basin and Nash Draw where high concentrations of chloride exist and where produced water could be disposed of while providing reasonable protection against contamination of fresh water supplies designated by the State Engineer. Since then 25 cases requesting exceptions to Order No. R-3221 have been approved while several others have been denied for various reasons. It is the purpose of this memorandum to outline some of the relevant concerns and provide a standardized procedure for applicants and hearing officers to follow in hearing and deciding such cases.

Legal Considerations

(1) The Division is authorized by Section 70-2-12 B (15) of the Oil and Gas Act to make rules, regulations, and orders for the purpose of regulating "the disposition of water produced or used in connection with the drilling for or producing of oil or gas, or both, and to direct surface or subsurface disposal of such water in a manner that will afford reasonable protection against contamination of fresh water supplies designated by the State Engineer."

(2) The State Engineer by letter dated April 13, 1967, and pursuant to the above-named Section designated all underground water containing 10,000 milligrams per liter or less of total dissolved solids as water to be protected,"except that this designation shall not include any water for which there is no present or reasonably foreseeable* beneficial use that would be impaired by contamination."

(3) By letter dated July 10, 1985, the State Engineer reaffirmed the designation regarding groundwater and further designated all surface waters of all streams within the state for protection regardless of the quality of the water within any given reach. The letter also directed that no lakes or playas be contaminated although they may contain greater than 10,000 mg/l TDS unless it can be shown that contamination of the lake or playa will not adversely affect ground water hydrologically connected to the lake or playa.

(4) In finding (4) of Order No. R-3221, the OCC determined that fresh water supplies as
designated by the State Engineer exist in substantially all-areas where there is surface pit disposal and in substantially all the area encompassed by Lea, Eddy, Chaves, and Roosevelt Counties, New Mexico.

*Although not formally defined, the term "reasonably foreseeable" has been taken to mean a time period of not less than 200 years in the future, and in other instances to mean much longer times (thousands of years).

(5) Findings (5) and (6) of Order No. R-3221 determined that the disposal of water produced in conjunction with the production of oil or gas, or both, on the surface of the ground, or in any pit, pond, lake, depression, draw, streambed, or arroyo, or in any other watercourse, constitutes a hazard to existing fresh water supplies, as designated by the State Engineer, in the vicinity of such disposal; and that such disposal, or any other disposal in any other place or manner which will constitute a hazard to any fresh water supplies should be prohibited in the above listed counties so as to afford reasonable production of fresh water supplies.

(6) Finding (12) of Order No. R-3221 determined that produced water surface disposal of not more than one barrel per day per 40-acre tract served by the pits presented little hazard to fresh water.

(7) Paragraph NO. (3) of Order No. R-3221 prohibited the disposal of produced water in the manner described in paragraph (5) above in Lea, Eddy, Chaves, and Roosevelt Counties, New Mexico.

(8) As an amendment to Order No. R-3221, Order No. R-3221-B excepted major portions of Clayton Basin and Nash Draw in Lea and Eddy Counties based (1) on the existence of a number of large surface ponds, or lakes, containing extremely high concentrations of chlorides within the area [Finding (8)] and (2) on the determination that the reasonable protection against contamination of fresh water supplies by surface disposal of produced water would not be advanced by, the enforcement of Order No. R-3221 in that area [Finding (11)].

Exception Procedures

An exception will be granted only if an applicant demonstrates that potentially usable ground water will not be affected. The following procedures should be followed in review of application for exceptions to Order No. R-3221 as amended:

(1) Based upon the Findings in Order No. R-3221, the Division must assume groundwater to be present at shallow depths throughout the area defined in said order unless the applicant specifically documents otherwise. The absence of wells does not necessarily indicate lack of groundwater, since wells are drilled only when a water supply is needed. Likewise, the lack of a sufficient water supply to provide for commercial or industrial use does not mean that a supply sufficient to provide domestic or stock water does not exist. Also, the lack of groundwater at a site does not mean that the surface discharge could not impair other groundwater, since the discharged water could move downdip in the subsurface so as to commingle in the reasonably foreseeable future with an uncontaminated water supply and impair its use. The applicant must show that discharge in an area containing no groundwater will not cause impairment in an adjacent area with groundwater.

(2) The Division must assume that any groundwater present that could be affected by surface disposal has 10,000 mg/1 or less of total dissolved solids unless otherwise documented by the applicant. This includes shallow groundwater at the site, or groundwater that could be impaired by movement of contaminated groundwater.

(3) The Division must further assume, unless the applicant demonstrates otherwise, that present or reasonably foreseeable beneficial use of water that has 10,000 mg/1 or less of total dissolved solids would be impaired by contamination due to surface disposal of produced water. An applicant has several options to attempt to demonstrate lack of beneficial use:

(a) If water is of very poor quality nearing 10,000 mg/1, the applicant can present current water use, future projected use, availability of alternative supplies, etc., in an attempt to demonstrate that there is no reasonable relationship between the economic and social costs of failure to grant the exception and benefits to be gained from continuing to protect the water for domestic or agricultural use now or in the future. The water would be considered or judged to be already so contaminated that it would be economically or technologically impractical to treat the water for use at present or in the reasonably foreseeable future using treatment methods reasonably employed in public water supply systems. Methods in common use include aeration, air stripping, carbon adsorption, chemical precipitation chlorination, flotation, fluoridation and granular filtration. Methods known to be used under special circumstances include desalination, ion exchange, and ozonation.

(b) The applicant can attempt to demonstrate for water currently contaminated, either by natural processes or human activity such that it cannot be beneficially used now or in the future, that the further addition of types and volumes of contaminants will not cause impairment of uncontaminated waters, beyond what would occur through natural movement. The applicant can attempt to demonstrate that the groundwater present is not of sufficient volume to provide a reliable water supply for beneficial use, including domestic or stock use. This could occur if the shallow water was located in a discontinuous stratigraphic zone or lens of limited areal extent.

The above options are only examples; other alternatives can be considered as long as water that has future beneficial use is protected.

Summary

The burden of proof to demonstrate that an exception should be granted is on the applicant. It may be necessary for the applicant to prepare and submit a complete hydrologic report for the vicinity of the proposed surface disposal site. This has been done previously and successfully for sites near Eunice, Loco Hills and Laguna Plata. No application is ever to be granted simply because it is not opposed.

Exceptions to Order No. R-3221 granted pursuant to these procedures may be administratively rescinded by the Division Director whenever it reasonably appears to the director that such rescission would serve to protect fresh water supplies from contamination

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