Arizona Administrative Code › Title 18 - ENVIRONMENTAL QUALITY › Chapter 11 - DEPARTMENT OF ENVIRONMENTAL QUALITY - WATER QUALITY STANDARDS › Article 5 - AQUIFER BOUNDARY AND PROTECTED USE CLASSIFICATION › Section R18-11-503 - Petition for Reclassification

Current through Register Vol. 30, No. 28, July 12, 2024
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				withdrawn.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.