A contractor is hired to build a large cement manufacturing plant near a residential area and a river.

Requirement: A cement plant is classified as an Environmentally Critical Project (ECP) because of its scale and potential for air and water pollution. The contractor and owner cannot simply start digging. They must first hire environmental consultants to conduct a full Environmental Impact Assessment (EIA), submit an Environmental Impact Statement (EIS) to the EMB, undergo public hearings, and finally secure an Environmental Compliance Certificate (ECC). Building without an ECC carries massive fines and a Cease and Desist Order (CDO).

A road construction project in an urban area creates massive clouds of dust, affecting nearby businesses and residents.

Application: Under the Clean Air Act, construction activities must minimize dust generation. The contractor is required to implement control measures such as regular watering of unpaved roads, covering dump trucks carrying loose materials, and installing perimeter dust screens. Failure to comply can result in fines from the DENR or LGU.

A contractor demolishes an old concrete building and dumps the rubble in a nearby vacant lot without permission.

Application: This is illegal dumping under RA 9003. Construction and demolition (C&D) waste must be properly segregated, recycled where possible (e.g., crushing concrete for base course), and disposed of only in approved sanitary landfills. The contractor faces fines and the revocation of their permit.