Designing an efficient industrial wastewater network within a highly active, high-hazard petroleum storage terminal presents intense chemical, mechanical, and fluid dynamics complexities. Industrial runoff from fuel loading racks, tank farms, and containment dikes contains volatile hydrocarbons, suspended solids, and chemical contaminants that require sophisticated extraction techniques before environmental discharge. PDP Energy had to navigate complex technical constraints, engineering a robust drainage network capable of collecting irregular stormwater surges and process wastewater without risking cross-contamination or structural backflows. Furthermore, sizing the centralized separation equipment and oil-water separators demanded highly precise hydraulic calculations and fluid velocity mapping to maximize separation efficiency under varying flow rates, all while operating seamlessly alongside continuous terminal logistics.