PORTLAND, Ore. (AP) — Two environmental groups are threatening to file suit against Zenith Energy over construction work at its oil terminal in Portland. Oregon Public Broadcasting reports on Monday, Willamette Riverkeeper and Columbia Riverkeeper filed a notice of intent to sue the company if it doesn’t get a stormwater permit within 60 days. The groups say they have documented land-clearing and grading at their proposed construction site that is in violation of the Clean Water Act without a construction stormwater permit. The oil terminal receives crude oil from trains, stores it in tanks and sends it via pipes to outgoing ships. The company applied for permit but hasn’t received it yet. Zenith declined to comment.