Complex sentence: Additionally, in 1987 the refinery completed the deepwater discharge project moving the effluent discharge point from Castro Cove to deep water in San Pablo Bay to provide for greater dilution of remaining contaminants and minimizing the impact on water quality.
Split into simpler sentences: Additionally, in 1987 the refinery completed the deepwater discharge project. The effluent discharge point was moved from Castro Cove to deep water in San Pablo Bay to provide for greater dilution of remaining contaminants and minimizing the impact on water quality.