Phosphate Slag Construction Fill from Canada
Granular phosphate fertilizer production slag used as structural fill and pipe bedding in construction. Falls under 2517.20.00.00 as macadam of similar industrial waste.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Radioactivity screening certificates required for phosphate slag imports
• Gradation curve documentation essential for engineering specification compliance
• Neutralization treatment proof prevents acidic soil reaction claims