Also, make sure the ABS solvent is rated for exposing to water relatively quickly, like less than an hour.To me, the big deal is that you'll have to offset the main soil stack - the largest black vertical pipe. 

If EPA feels like it, they can do a soil test.

@Mike Vakas  - when it you want to bring the name up, hit the @ sign, and then start typing the name with no spaces (at least three letters).Underneath your message bar, you should see some names pop up. 

The only thing that has been proven is that there is a fault line that runs underneath the area that has been inactive for quite some time.

Is moisture coming up from underneath?

I have a house under contract that has sheathing rot (underneath asbestos siding) due to an improperly built room addition that left exposure to moisture.

When i spoke to the realtor he told me I can hire a company to test the soil around the tank.

Apparently the dry cleaners use some chemicals which can seep through concrete into soil.

And Jay Hinrichs the main reason I would see in scoping a new sewer line like that is it is very common to get what they call a belly in a sewer line which is where the ground underneath sinks in one area causing essentially a low spot and can be very common due the so much change in the ground on a new construction and only wound take one rain or some ground water.

First does the land already come with soil analysis?