what you are describing is an OSHA roadblock since the 70’s. That being contaminated dirt et al as tanks sweat rupture or slow leak into the surrounding area. To change or drop new tanks for diesel, soil samples must be taken and well...................this is where state and federal crooks do their crimes.........Fees and fines are huge and certain...........
Yep: it’s all part of a big Federal mess: becuase of the government decree regarding the Exxon/Mobil merger, the station was forced last year to drop Mobil b/c of a nearby Exxon. He went with Sunoco. He used the opportunity to convert new pumps, fix the tanks, etc. My understanding is that while the cost for installing diesel would have been high, it would have been far cheaper to have done it all at once during the makeover.
Anyway, as I study the impact of public policy on automotive history, I’ll have to add this one to the list. Thanks for the explanation.