An Inventory Of Drinking Water Contaminants
In testimony before the Subcommittee on Atmosphere and Hazardous Materials, Committee on Power and Commerce, U.S. Home of Representatives, John Stephenson (March 5, 2003, http://www.gao.gov/new.gadgets/d03529t.pdf), the director of the Pure Sources and Environment, stated that as of December 2002 at least 19% to 26% of states still had problems with LUSTs. Although 89% of the 693,107 tanks topic to UST guidelines had leak prevention and detection gear installed, greater than 200,000 tanks weren't being operated or maintained correctly. The states reported that due to insufficient operation and maintenance of the leak detection gear, even these tanks with the new equipment continued to leak. To deal with the problems, Stephenson beneficial that Congress provide states more funds from the UST federal trust fund that was created in 1986 to ensure improved training, inspections, and enforcement efforts. As well as, Stephenson steered that Congress require the states to inspect tanks no less than each three years and supply the EPA and the states with extra enforcement authorities.
To clear the FSB filter itself, typically simply rinsing sand in de-chlorinated water after which placing again in the filter will take care of a clog or poor fluidation due to organic buildup throughout the filter.
If sand has backed up into the intake pipe, typically many lower powered aquarium pumps won't be able to push this out. Generally the aquarium keeper can blow this out, however more often I discover including just a few drops of de-chlorinator to the intake side of the FSB Filter, then holding a water hose tightly to this intake will shortly blow out the "sand jam".
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