Recently a colleague shared research he and others have been doing, looking for causes of and a solution to corrosion in concrete sewage tanks. As I have indicated in past columns, the common answer has been corrosion — particularly at the outlet baffle in septic tanks — is due to the lack of adequate venting.
Over the years, this has resulted in a lot of discussion about where gases that cause the deterioration come from, where they are generated and what can be done to prevent the problems. This is a topic I will address in an additional column.
When I looked
