Major discharge for inland and coastal is

• A. Inland more than 1,000; Coastal more than 10,000
• B. Inland more than 100,000; Coastal more than 1,000,000
• C. Inland more than 50,000; Coastal more than 500,000
• D. Inland more than 10,000; Coastal more than 100,000

Answer: (D)

Discharge thresholds are set to flag spills that require heightened attention based on where they occur. Inland bodies of water are typically smaller and more sensitive, so a spill that exceeds 10,000 gallons is already a major discharge. Coastal waters, being larger and more dynamic, need a larger volume before it’s classified as major—100,000 gallons. This difference helps ensure the response level matches the potential impact: smaller inland spills can cause significant harm quickly, while coastal spills require more volume to reach a comparable level of concern.

So, the major-discharge threshold is inland greater than 10,000 gallons and coastal greater than 100,000 gallons.