This is an Administrative Compliance Order pursuant to Clean Water Act Section 311(c) issued to Big Island Asphalt Company, Inc. The order requires Big Island to address a substantial threat of oil discharge to the waters of the U.S., specifically Hilo Harbor, Big Island, Hawaii. The Order directs Big Island to submit a work plan to characterize the extent of the contamination and the measures necessary to clean up the site and prevent further discharge. Big Island Asphalt is an asphalt manufacturing facility located approximately one-quarter mile from Hilo Harbor. Drainage from the facility travels by storm drainage swales to Hilo Harbor and the Pacific Ocean. In November 2004, an EPA inspector found oil and oily water discharges from containers at the facility. The facility lacked proper controls to prevent discharges of oil. While the facility has made some changes since the time of the inspection, a substantial threat of discharge remains. Pursuant to the present order, Big Island Asphalt must submit a work plan for EPA approval. The actions required by the order include implementation of immediate measures to halt the discharge of oil, sampling and post-removal controls.