State may limit drilling byproduct from being spread on farms
Pennsylvania is seeking to limit the use of sewage sludge as a fertilizer on farmers’ fields if the sludge comes from sewer plants that treat wastewater from natural gas drilling.
Environmental regulators’ concerns about the sludge were highlighted in a New York Times article on Friday that described the risks of radioactive contaminants in the drilling wastewater concentrating in the sludge during treatment. The sludge, also called biosolids, is sometimes sold or given away to farmers and gardeners as fertilizer if it meets certain standards for pathogens and metals.
The Times article quotes from a transcript of a March 15 conference call between officials with the federal Environmental Protection Agency and the state Department of Environmental Protection about how to better regulate discharges of the wastewater that can be high in salts, metals and naturally occurring radioactive materials.
DEP is developing a guidance document about how to include new wastewater treatment standards into permits for new or expanding treatment plants that handle the drilling fluids. The new standards limit the amount of salty discharge, called total dissolved solids, that can enter state streams.
The draft guidance document would also bar treatment plants that receive untreated drilling wastewater from using their sludge for land application.
Ron Furlan, a division manager for DEP’s Bureau of Water Standards and Facility Regulation, is quoted in the the New York Times as saying sludge was included in the guidance document because “we don’t have a good handle on the radiological concerns right now, and in any case we don’t want people land-applying biosolids that may be contaminated to any significant level by radium 226-228 or other emitters.”
The guidance does not carry the legal weight of a regulation and would not be imposed on treatment plants unless their discharge permit is up for renewal or they apply for a new or expanded permit.
The draft guidance also proposes that treatment plants accepting untreated drilling wastewater develop radiation protection “action plans” and have monitoring requirements for radium 226 and 228, gross alpha and uranium established in their permits.
In a letter this week to the EPA, DEP Acting Secretary Michael Krancer wrote that the state has directed 14 public water supplies that draw from rivers downstream from treatment plants that accept Marcellus Shale wastewater to test the finished drinking water for radioactive contaminants and other pollutants. The state also called on 25 treatment plants that accept the wastewater to begin twice monthly testing for radioactivity in their discharges.
Tests of seven state rivers at sites downstream from wastewater treatment plants last fall showed that levels of radioactivity were at or below normal levels.
In the conference call quoted by the New York Times, environmental regulators also expressed concerns about radionuclides settling in the sediment of rivers where the incompletely treated wastewater is discharged from sewer plants.
“If you were really looking for radionuclides, that’s the first place I would look,” Furlan said.
DEP spokeswoman Katy Gresh said Friday that there are currently no plans to begin testing river sediment for radionuclides.
“We will use the results of the increased testing/monitoring to see what is being discharged before making that decision,” she said.
By Laura Legere (Staff Writer)
Published: April 9, 2011
http://citizensvoice.com/news/state-may-limit-drilling-byproduct-from-being-spread-on-farms-1.1130088#axzz1J1xZtYwG