@Nik Moushon  in our area here in the north west you have two major issues.You have commercial timber lands ( huge HUGE areas designated as such as big as many states on the east coast) these lands are protected for timber production. in Oregon you need 160 acres minimum lot size for a single home in many of these timber reserve loans.then you have prime low land farm land.. and those are even tougher to try to develop.. no matter that they are not near as valuable as farm land.. but its the farm bureaus protecting their turf.Then you get to CA and you need to do full blown EIR's  ( environmental impact reports) these can cost 200k to 1 mil up front with no assurance your project will be approved..its a tough game out here in the west. 

Here is a Env Hazard search map by CA.Cal MyHazards - Environmental Hazards Search.

That might be ehh ok, CA has too many fees on environmental.

Review and approval of the documentation concerning the property; Completion of satisfactory physical and environmental inspections of the Property; including suite inspections.Completion of satisfactory due diligence search and examinations;Satisfactory review of the title of the Property;Satisfactory first mortgage financing being arranged for the purchase of the Property;Satisfactory second mortgage being provided by the Vendor for the purchase of the Property;7.

They left her with an unfinished ceiling where she had to hire someone else to install new drywall.PS - I've taken samples down to Family Environmental in Rino for testing.

Having building inspectors, zoning boards, health departments, environmental regulators and other officials to satisfy can be difficult and ultimately make any owner decide to dump a property.

Because we have so many deals that are coming down the pipeline, and because a very small percentage of deals make it through the strict criteria we have, and even fewer go to sale, we can't get a full report for each property we're researching.Are there any online resources for historical environmental issues with properties or any possibly hazardous additions like new underground tanks etc?

If a property has environmental issues, like crack and meth in the walls, the powers that be generally file a notice along with the clean up order nailed to the building, which can be removed.

At a 5 cap you would have 540,000 sales price.You said 75k a unit is what you believe they are trading at. 75k X 6 = 450,000450,000 is a 6 cap rate.Let's say you spend for everything roof, parking lot, environmental, legal, plumbing, electrical, HVAC, unit build out and finishing averages at 30,000 a unit.You buy at 20k and put in 180,000 for a total of 200,000.

With so many more environmental regulations in the world could this affect the property and your wallet down the road?