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�. -.��. Phosphide Post Fumigation Cleanup Process Documentc Approved by: Marie Diaz Control: SOP P E A R L C R O P Revision: September 2025 Issue Date: October 2019 Confidential Supersedes: SQF#: xxxx-V9 Document I. Scope This SOP applies to all personnel involved in the post-fumigation cleanup process using aluminum/magnesium phosphide products. II. Person Responsible • Certified Applicator/Supervisor: Ensures all personnel are properly trained, provided with appropriate PPE, and that disposal is conducted in accordance with manufacturer instructions and all applicable federal, state, and local regulations. • Operatives/Crew: Follow this SOP, wear appropriate PPE, and handle all spent material with due care. III. Equipment Needed/Form Needed • NIOSH/MSHA approved respiratory protection if exposure to dust is likely or phosphine concentration exceeds Permissible Exposure Limits (PEL). • Appropriate work uniform and eye protection (safety glasses/goggles). IV. Procedure Hazardous Waste Classification: Spilled, partially reacted, or unused Fumi-Cel and Fumi-Strip fumigants are considered hazardous wastes under federal regulations. Wet Deactivation Method: Place the spilled material into a container filled with water, ensuring the fumigant is submerged. Allow the mixture to stand for approximately six hours. After deactivation, the mixture can be safely disposed of at a sanitary landfill or other approved sites. Do not use detergents for deactivation. Disposal of Residual Dust: Small amounts of spent residual dust may be disposed of on-site by burial or spreading over the land surface away from inhabited buildings. Residuals can also be collected and disposed of at a sanitary landfill, incinerator, or other approved sites. Packaging and Transport: Page 1 of 2