. :) 400 GPM will run a small city LOL.. maybe you meant 40 gpm :)   having dealt with wells and septics my entire career  one would need to do some good due diligence on this stuff.. if trucking in water is allowed then I guess thats the fix when the well dries up.. if the ground water is not recharging you certainly could have a lot  of dry holes.

I have seen old septic systems consist of an old car body for the tank and field all rolled into one (BTW cars rust away and the whole thing caves in - also provides zero treatment and discharges raw sewage to the groundwater) Proximity to a well is important.

He probably has a leak, we're at the top of the Palisades so groundwater is unlikely.

Jermaine here wow that price is very high in my opinion, Last year we took a long look at building two six unit building, the city had so much red tape,from commercial water,adding a additional transformer, ground water runoff, and that is not even the stuff for the building, just thinking about it I have a headache.We just bought one.

I am by no means an expert, but if it's never flooded in the past, I'd thing maybe it's not a groundwater problem, but something involving drainage.

Worst of all, it was ground water--coming up from underneath the slab, and there was no easy way to stop the flooding.Adding insult to injury was the fact that this was the third time in six monthsthe house had flooded.

I was told the ones in closest proximity to the house are to be "capped" by the end of the year, but I would like to verify that myself.The property is connected to city water, so I guess the issue that could arise is whether or not groundwater contamination has or could occur. 

@Steven Hamilton IIWhat’s would a 7-9k foundation repair to prevent ground water damage qualify as?

A couple downsides on this one: previous landfill (looks like I'll be using some of the skill I learned on our ROC brownfield development site), currently HAS 6 DEP wells for monitoring ground water, though I'm not sure if they are active.

Just rising cold ground water to 70-80 degrees before it enters the 2nd heater can make a tremendous difference.