Ed;You are only half right when you stated that inflow and infiltration are the problem not sewage leaking out of the system. If you read Mr. Bradshaws article you will see that he states there is a danger of the leaking pipes polluting our groundwater.
Take into account that over 40% of the sewer piping is above the water table and it doesn't take a rocket scientist to figure out that sewage leaks out of the system every day.
Now if you look at http://www.marcoislandblog.blogspot.com/ you will see that in order for the 170,000 gallons that I stated were leaking, from the system, to take place you need only have a hole or several holes adding up to a mere 16 square inches, or a 4" X 4" hole.
Add to that the fact that most leaking from sewer systems comes from the pipes that connect the users to the system, which are all above the water table, and you will see that there is no doubt that the Marco Island Sewer System is causing ground water pollution on the Island.
So you see Ed, there are holes in the system below the water table which let water into the system, "Infiltration", and holes above the water table which let sewage out, "Exfiltration". It's not a real hard concept for most to understand.
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