<human>: Can you summarize the given text in a few sentences?

I am in Ohio. 

Spring of 2014 we had some severe rain storms that caused some sewer back ups and a bunch of other problems. 

A few months later I got a letter from the city telling me that they had performed a dye test on my house and determined that I had some rain water infiltration issues. 

The test is basically that they dispense a large (apparently as much as they want) amount of dyed water to various places to (spouts, foundation, lawn, etc,) and then watch the exit of your storm sewer to see if any dye comes out. There is no procedure or defines pass/fail criteria that they could provide beyond saying that if they see anything, it fails. 

Based off of this, they determined that I had 2 problems I need to have fixed. The first was a disjointed condition where the sewer enters my house. The second was an undefined leak somewhere under my lawn. The sewer people I have had come out told me that the disjointed condition is real. They also told me that the lateral line under my lawn is perfectly normal and looks fine. It doesn't have any major issues and they would not recommend replacing it. 

After getting several quotes, it seems like getting a sewer relining is the best option. The trouble is this would cost me $5,000. 

What options do I have to fight back against the city? Is there a type of lawyer I should contact for this? Environmental law?
<bot>: The city is trying to force me to make very costly sewer repairs that seem to be largely unnecessary. I need to know if there is anything I can do to fight back.