December 31, 2016 marked a deadline for oilfield operators to comply with the Division of Oil, Gas and Geothermal Resources’ (“DOGGR”) Aquifer Exemption and Compliance Schedule Regulations. Operators were required to either cease injection of oilfield wastewater or obtain an aquifer exemption to continue injecting such wastewater. This deadline was applicable to 11 aquifers that were historically treated as “exempt” aquifers, but have recently undergone review by DOGGR due to compliance issues with the federal Safe Drinking Water Act (“SDWA”).
For any underground injection project approved by the Division [DOGGR] for injection into one of the 11 aquifers listed in subdivision (b)(1), injection shall cease by December 31, 2016, unless and until the U.S[.] Environmental Protection Agency, subsequent to April 20, 2015, determines that the aquifer or the portion of the aquifer where injection is occurring meets the criteria for aquifer exemption.
Cal. Code Regs. tit. 14, § 1779.1(b)