SECTION 252:653-3-2. Raw water and aquifer characterization plan ("RWACP") requirements

(a)   RWACP required. Prior to initiating the raw water and aquifer characterization, a plan meeting the requirements of this Section shall be submitted to DEQ for approval, in order to determine the level to which raw water must be treated and to maintain the quality of groundwater in the aquifer.

(1)   DEQ Approval required. Characterization shall not begin until the RWACP has been approved by DEQ.

(2)   RWACP revisions. Any revisions to the RWACP shall be approved by DEQ.

(b)   RWACP content. The RWACP shall include the following information at a minimum:

(1)   a proposal for the characterization of the raw water that evaluates:

(A)   the source of the raw water;

(B)   the chemical and biological composition as well as physical characteristics of the raw water;

(C)   flow rate;

(D)   total annual volume planned to be used for ASR;

(E)   characterization of the raw water during high flow and low flow conditions and other atypical flow conditions;

(F)   the duration and frequency of sampling and sampling methodology;

(G)   reliability of deliveries; and

(H)   conveyance methods.

(2)   a proposal for hydrological investigation and characterization of the aquifer that evaluates:

(A)   areal and vertical characterization of the ambient water quality in the aquifer;

(B)   geochemical characteristics and hydrogeologic properties of the aquifer;

(C)   volumes and capacity of the aquifer;

(D)   analysis of the compatibility of the delivered water with the aquifer media and the resulting impact;

(E)   installation of exploratory borings and monitoring wells;

(F)   surface water infiltration rates;

(G)   groundwater migration rates;

(H)   methodologies for obtaining aquifer parameters;

(I)   groundwater level and quality monitoring plans;

(J)   surface water (including springs, base flow, wetlands and/or other characteristics) flow and quality measurements; and

(K)   potential for land surface subsidence.

(3)   a proposed method to calculate the amount of recoverable water and proposed method of water recovery which provides:

(A)   the amount of recoverable water in storage;

(B)   the method of calculation to determine the amount of recoverable water; and

(C)   the proposed method of water recovery.

(4)   a discussion of the hydrogeological information to include:

(A)   depth to groundwater and elevation of groundwater (or potentiometric surface of groundwater) in the area of hydrologic effect;

(B)   perched groundwater conditions;

(C)   groundwater flow direction and velocity;

(D)   description of the aquifer selected for storage, including its areal extent and any associated confining or semi-confining layer(s);

(E)   rock and soil types in the vicinity of the proposed ASR project;

(F)   subsurface lithology and mineralogy/geochemistry in the vicinity of the proposed ASR project;

(G)   relevant aquifer parameters;

(H)   groundwater quality data and the methods used to measure or estimate their values;

(I)   water quality of any wells within the estimated area of hydrologic effect;

(J)   subsidence data;

(K)   planned duration of the ASR project and its facilities; and

(L)   relevant information on past and present land use

(5)   a proposed schedule for completion of the RWACP; and

(6)   any additional information DEQ determines to be necessary for the specific ASR project.

[Source: Added at 35 Ok Reg 1333, eff 9-15-18]