Is a chemical soil survey useful?

Hello,
we intend to buy a plot of land. Our general contractor says that the site has been used as farmland for decades.
Construction is also taking place next to us, and these plots show no irregularities. Soil condition reports are available. Statement by the general contractor.

The land contract includes the standard clauses:
The seller assures that he is not aware of any so-called contaminated sites or other environmental damage. Regardless of this, the seller does not guarantee that the contract object is free of ecological contaminated sites and other environmental damage.
The costs for measures to eliminate any existing defects as described above are to be borne by the buyers in the internal relationship between the contracting parties.

Am I just driving myself crazy, or should I have a little basic trust? The company does want to build a house and generate money.

Thank you!

trust your GU, otherwise go for a walk in the area and ask the locals what was there before, if landfill, gas station, chemical factory etc. they know that

Is there any reason to doubt the information? Normally, I would trust the GU (probably more the developer, if he is selling you the house + land). If you want to be on the safe side, you might consider asking the city / building authority if they perhaps have more information? Is there maybe already something mentioned in the development plan or environmental report? Otherwise, you could of course commission a soil survey at your own expense, if the current owner agrees.

Check with the city's contaminated sites register to see if there is anything about the area. Ask the city what requirements there are regarding soil surveys. Also, personally ask the neighbors sometime. But ask carefully, so you don't wake sleeping dogs.

Of course, your exact property could be the contaminated part of the field, but the probability is probably low. In addition, it depends on your personal feeling, for example, whether old fertilizer bothers you or not. There are also many people who have no problem building a house on the notorious former landfill.