One day when visiting the site, a site supervisor brought to your attention the location of an old waste oil tank in a different area of the facility and asked you to include the removal of that tank within your project scope.

You obtained a preliminary estimate of $15,000 to add the removal of the waste oil tank to the project scope. Based on all information provided to you in the scenario, how would this change impact your project and would you recommend proceeding with the requested change of scope?