Lane said the moratorium shut down only four waste wells
, and is concerned that many others remain in operation outside the moratorium area.
EPA is not consistently enforcing and overseeing class II wells, said GAO, The class II waste wells
in question are not subject to the same rigorous geologic study, safety reviews and regular monitoring that the EPA requires of other toxic waste injection wells from other industries, making it difficult for the EPA to enforce protections of underground drinking water supplies.
"There could be alternatives that have to be developed," he said, noting that perhaps drillers should put waste wells
in places less susceptible to earthquakes or use trucks or rail lines to ship waste water to safer containment wells.
Each doublet contains 2 sample wells that share common cathode and waste wells
. Microchannels were coated with poly-N-hydroxyethylacrylamide (polyDuramide) in a dynamic coating procedure (12).
(86.) "EPA Keeps Eye on Waste Wells
, Official Says," December 8, 1971, clipping, injection well binder, Emmot Environmental Collection, box 2, Houston Metropolitan Research Center.