The property has been a truck terminal for years and he knows it’s “contaminated”.

If it has contaminants below the surface such as Flint MIis it worth less?

The city is passing out water filters, free water and other services to make sure people do not have to drink contaminated water.

I'd say your biggest concern will be environmental issues, lead paint, asbestos, or other contaminations that you'll likely have in older homes and in that price range, probably updates were limited if any were made

Also be aware that some old farm houses have underground gas tanks that have deteriorated and contaminated the ground, this is a big concern that many people overlook.

California is yet to update it's meth clean up page, but it does seem to contain a contamination level of 1.5 micrograms per 100 square centimeters as a standard for presumably the max amount of residual methamphetamine.https://www.dtsc.ca.gov/SiteCleanup/ERP/Clan_Labs....For cleanup, there are lots of other state sites, e.g.

You do not have to share your Phase I findings with the seller, so if it winds up being relatively free of potential soil and ground water pollution or contamination, you may be able to get a below market deal. 

I realize that i wont be living there but it is a concern about contamination.

If not, he stated that he could do a "sweep" for $250 that would identify if there is an underground tank with contaminated soil.

He got caught, the materials are all co-mingled, and they now all have to be considered as contaminated with asbestos, even the sandstone which is extremely heavy.