On August 28, 2019, EPA issued a proposed rule titled Oil and Natural Gas Sector: Emission Standards for New, Reconstructed, and Modified Sources Review (the “Proposed Rule”). The Proposed Rule, if adopted, would rescind certain parts of the New Source Performance Standards (“NSPS”) related to methane and volatile organic compounds (“VOCs”) in the oil and gas industry.
First, EPA is proposing to redefine the operations included in the NSPS source category for the oil and gas industry. The original source category listing for the oil and gas industry, issued in 1979, included the production and processing segments of the industry. In 2012 and 2016, EPA expanded the oil and gas industry source category to include the transmission and storage segment of that industry. The Proposed Rule would remove sources in the transmission and storage segment from the oil and natural gas source category and would rescind the methane and VOC emission limits, adopted in 2012 and 2016, which currently apply to those sources.
Second, EPA is proposing to rescind emissions limits for methane (but keep limits for VOCs) in the production and processing segments of the oil and gas industry.
How Low Will The Regulators Go: California Sets New PFOA/PFOS Drinking Water Notification Guidelines
On August 23, 2019, California’s State Water Resources Control Board (Water Board) announced updated guidelines for local water agencies with respect to perfluorooactanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) in drinking water. The updated guidelines lower the notification levels from 14 parts per trillion (ppt) to 5.1 ppt for PFOA and from 13 ppt to 6.5 ppt for PFOS. Public water supply systems are required to report exceedances of these guidelines to their governing boards and the Water Board.
According to the Water Board, these new guidelines were predicated on updated health recommendations issued by California’s Office of Environmental Health Hazard Assessment (OEHHA), which published its own recommended notification levels for PFOA and PFOS, albeit at much lower levels. In a recently issued report, OEHHA recommended that the notification levels be set at 0.1 ppt for PFOA and 0.4 ppt for PFOS. However, OEHHA recognized that these levels are lower than what can reasonably be detected in the laboratory and therefore recommended that the Water Board set the notification levels at the lowest reliable detection levels.
In addition to the updated notification levels, the Water Board requested that OEHHA proceed to develop public health goals for both PFOA and PFOS, which is the next step in the process of establishing maximum contaminant levels for these contaminants in drinking water. We will continue to monitor and provide updates with respect to these regulatory efforts.