The force main in question is a 12" pvc line transporting raw sewage from one drainage basin to another. The topography of the area we live in requires pump stations to assist in the transport of sewage waste to the treatment facility. The downside to this method of transport is the long...
Specifically in a 10-12" force main with 360,000 gallons per day avg. flow in approx 18,000 linear feet force main. Samples reveal over 200 ppm H2S (maxed out my meter) and PH of less than 2.
In the area that I work in, the city does require a bond or LOC to be placed on sewer as well as streets. This bond is held (but is subject to reduction) for one year after final inspection and start-up of the sewer occurs. However an additional inspection is conducted by city inspectors before...