Extensive studies were undertaken to find a chemical treatment plan for hydrotest water. The goal was to find a treatment plan, which could protect pipelines from corrosion, comply with environmental guidelines for water discharge and also minimize chemical cost. Special blends intended for corrosion and scale protection were made. The special blends were used in combination with biocides to treat Galveston seawater. The experimental results indicated that the special blends in combination with low doses of biocides protected mild steel corrosion coupons from oxygen corrosion and microbiologically influenced corrosion (MIC) without adding toxicity to the treated seawater.