Before revision: The great majority of double-walled piping applications involve wastewater, groundwater and process safety.Basta, Nick Double up to contain leaks Chemical Processing, Putman Media, Inc.; Dec 20, 2004; accessed Jan 2010 U.S. Environmental Protection Agency (EPA) standards, published in 40 CFR Parts 280 and 281, 40 CFR § 280.41 mandate double-walled piping for many below-ground transport systems in wastewater treatment plants and at sanitary or hazardous-waste landfills or remediation sites.
After revision: ,The great majority of double-walled piping applications involve wastewater, groundwater and process safety.Basta, Nick Double up to contain leaks Chemical Processing, Putman Media, Inc.; Dec 20, 2004; accessed Jan 2010 U.S. Environmental Protection Agency (EPA) standards, published in 40 CFR Parts 280 and 281, 40 CFR § 280.41 mandate double-walled piping for many below-ground transport systems in wastewater treatment plants and at sanitary or hazardous-waste landfills or remediation sites.