When do you need a soil survey?

Soil survey is required in the following cases.
①When a specific facility that uses harmful substances or a business establishment such as the use of specified hazardous substances is abolished (it is possible to receive a postponement of soil contamination status survey under certain conditions).
②When the mayor of Yokohama decides that it is necessary to conduct a soil survey after receiving a notification of a change in land characteristics.
③In addition, when the Mayor of Yokohama recognizes that there is a risk of health damage due to soil contamination.

・ I would like to know the opportunity for soil surveys when factories and business sites are abolished. (Including the abolition of only some facilities in factories and business establishments.)
・ I would like to know the opportunity for soil surveys when changing land characteristics.