Ariz. Admin. Code § 18-11-503

Current through Register Vol. 30, No. 50, December 13, 2024

Section R18-11-503 - Petition for Reclassification

A. Any person may petition the Director to reclassify an aquifer from a drinking water protected use to a nondrinking water protected use pursuant to A.R.S. § 49-224(C).

B. A written petition for reclassification pursuant to A.R.S. § 49-224(C) or A.R.S. § 49-224(D) shall be filed with the Department and shall include the following categories of information:

1. The proposed protected use for which the reclassification is being requested.

2. The pollutant and affected aquifer water quality standards for which the reclassification is being requested.

3. A hydrogeologic report which demonstrates that the aquifer proposed for reclassification is or will be hydrologically isolated, to the extent described in A.R.S. § 49-224(C)(1). This report and demonstration of hydrologic isolation for the area containing such aquifer, and immediate adjacent geologic units, shall include at least the following:

a. Hydrogeologic area maps and cross sections.

b. An analysis of subsurface geology, including geologic and hydrologic separation.

c. Water level elevation or piezometric level contour maps.

d. Analysis of hydrologic characteristics of the aquifer and the immediate adjacent geologic units.

e. Description of existing water quality and analysis of water chemistry.

f. Projected annual quantity of water to be withdrawn.

g. Identification of pumping centers, cones of depression and areas of recharge.

h. A water balance.

i. Existing flow direction and evaluation of the effects of seasonal and future pumping on flow.

j. An evaluation as to whether the reclassification will contribute to or cause a violation of aquifer water quality standards in other aquifers, or in parts of the aquifer not being proposed for reclassification.

4. Documentation demonstrating that water from the aquifer or part of the aquifer for which reclassification is proposed is not being used as drinking water. This documentation shall include at least the following:

a. A list of all wells or springs including their location, ownership and use within the aquifer or part of the aquifer being proposed for reclassification.

b. Identification of groundwater withdrawal rights, on file with the Department of Water Resources, within the aquifer or part of the aquifer being proposed for reclassification.

c. A comprehensive list of agencies, persons and other information sources consulted for aquifer use documentation.

5. A cost-benefit analysis developed pursuant to the requirements of A.R.S. § 49-224(C)(3), except for petitions submitted pursuant to A.R.S. § 49-224(D). This analysis shall identify potential future uses of the aquifer being proposed for reclassification, as well as other opportunity costs associated with reclassification, and shall contain a description of the cost-benefit methodology used, including all assumptions, data, data sources and criteria considered and all supporting statistical analyses.

Ariz. Admin. Code § R18-11-503

Adopted effective October 22, 1987 (Supp. 87-4).