Petrochemical Facility Stormwater Management—A Case Study

by Y. J. Tsai, Stone & Webster Environmental, Technology & Services, Houston, United States,

Document Type: Proceeding Paper

Part of: Engineering Hydrology


As an integral part of a study to develop a combined wastewater treatment system for petrochemical facilities, comprehensive hydrological studies were performed prior to the detailed design of the wastewater treatment system to accurately define the flow rates, retention basin operations and flood control alternatives. The runoff of a design storm for the facilities was segregated into potentially contaminated stormwater and clean stormwater. This was achieved by curbing the potentially oily and chemically contaminated areas and providing adequate pumping capacity at the lift station. The existing oxidation pond was used as a detention basin rather than as a treatment facility. The wastewater in the detention basin is gradually released to the treatment facility and, after treatment, the effluent is discharged to the permitted outfalls at a rate allowed by the existing permit. Operating procedures for the detention basin and flood control alternatives for the facilities were determined by the hydrological routings and storm runoff modeling.

Subject Headings: Stormwater management | Case studies | Detention basins | Water treatment plants | Hydrologic models | Chemicals | Petroleum | Flood routing

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