I ran into an issue, trying to find a company for "Ground soil treatment" before pouring concrete ....so far I was not lucky with regular fumigation companies from craigslist, they don't do give the certificate needed  for the inspector, any leads?

This issue would be whether or not the type of work needed a lot of water (cement, soil irrigation, etc). 

This is is an area that was also impacted by Hurricane Sandy. 

Also, you can get epoxy based grout stain/sealer to match the original color if you have badly soiled grout.In my opinion if the kitchen and bathrooms look cheap the buyer will assume that the rest of the house was done cheaply as well.  

I'd choose a soft sandy color, in a flat or satin finish, which will make it even less noticeable that you've painted over the wallpaper.

The problem is major cracks and distortions in the line from soil settlement over the years.

They have to get some engineering done and a soil test before they apply for the permit. ( Est. 2 weeks) Fresno wanted 4 weeks for mine permit and we decided to pay extra which is supposed to bring it down to 2 weeks.

I will find out how bad or if it flooded at all with sandy hopefully on Saturday.Do you guys think I am nuts to take on an investment property in a flood zone or if gotten at the right price could be a good investment?

The majority of underground tanks (up to 80%) leak and if it does then you have soil and potentially ground water contamination to deal with.

The soil is clay based, so one of the mantras is "there's only two types of houses in Texas, those with foundation problems and those that will have".