Demolition of any building should have erosion and sedimentation (E&S) control plan approved by the Bucks County Conservation District prior to the start of work.
If the building footprint is being excavated, that is earth disturbance and would require an E&S plan approval prior to the start of work.
PA Code requires that E&S Best Management Practices (perimeter controls such as silt fence/compost sock, stabilization with straw mulch, etc.) be implemented for projects involving earth disturbance, no matter what size. It will prevent dirty water from leaving the site.
E&S plan is not required if the scope of work that involves strictly above-grade demolition on stable surfaces (paved or stone subbase), because there is no earth disturbance (excavation of soil/fill, grading etc.) involved.
E&S plan is required for any project with more than 5,000 square feet of earth disturbance. Most Municipalities have adopted municipal ordinances that set the threshold at 1,000 square feet, there is a variation in exactly what threshold is set.
E&S plan must be submitted for any project where there is potential for a sediment pollution issue.
follow the link: https://www.bucksccd.org/permitting-documents-overview/