Oregon Administrative Rules › Chapter 690 - WATER RESOURCES DEPARTMENT › Division 230 - STANDARDS AND PROCEDURES FOR LOW-TEMPERATURE GEOTHERMAL PRODUCTION AND INJECTION WELLS AND EFFLUENT DISPOSAL SYSTEMS › Section 690-230-0115 - Injection Plan for Wells with an Anticipated Injection Rate Exceeding 15,000 Gallons Per Day

Current through Register Vol. 63, No. 7, July 1, 2024
No low-temperature geothermal injection well shall be used for
				injection without approval of the Director in accordance with OAR
				690-210-0070. The
				injection plan for the proposed injection of greater than 15,000 gallons per
				day to a low-temperature geothermal injection well shall include, but is not
				limited to, the following:
(1) Details
			 of well construction, including water well reports for the production well and
			 the injection well.
(2) Description
			 of the number and location of water bearing zones from both production and
			 injection wells.
(3) Water
			 temperature data from both the production and injection wells.
(4) Water level data from both the production
			 and injection wells. If information from the well report is not sufficient to
			 determine the effects of injection, the Director may require additional
			 geologic or hydrologic information, including but not limited to,
			 temperature/depth logs of the wells.
(5) Water quality information including
			 analysis by a lab-oratory certified by the Oregon Health Division for drinking
			 water standards for the following parameters: arsenic, boron, calcium,
			 carbonate or bicarbonate, chloride, fluoride, iron, magnesium, manganese, pH,
			 potassium, silica, sodium, specific conductance, sulfate, suspended solids,
			 total dissolved solids, and total coliform bacteria. If the low-temperature
			 geothermal effluent is suspected to be of poor water quality or to be otherwise
			 incompatible with the water in the receiving zone in the injection well, the
			 Director may require additional specific water quality data. If the information
			 on the well reports for the wells involved is not sufficient to determine the
			 effects of injection, the Director may require additional geologic or
			 hydrologic information, including but not limited to, temperature/depth logs of
			 the wells. The Director may waive the requirement for specific portions or all
			 of the chemical analyses if the fluid quality is known to be suitable for the
			 intended production and injection.
(6) A map indicating the location and
			 elevation of both the production well and the injection well in accordance with
			 OAR
			 690-230-0045.
			 All maps shall be drawn to a standard, even scale of not less than 4 inches = 1
			 mile. Small area maps may be more easily and clearly drawn to a larger scale,
			 such as 1 inch = 400 feet. The well owner shall submit injection plans to the
			 Director indicating proposed separation distances between production and
			 injection wells on the parcel of land on which the production well is located,
			 on the parcel of land on which the injection well is located, and on all
			 adjacent parcels of land, as well as land surface elevation at each well
			 head.
(7) Any planned safeguards to
			 prevent substantial thermal or hydrologic interference with existing rights to
			 appropriate groundwater and surface water and alteration of existing or
			 potential drinking water supplies.
Stat. Auth.: ORS 537
Stats. Implemented: ORS 537