Sites that store large quantities of deicing/anti-skid products, which includes sodium chloride (“rock salt”), calcium chloride, magnesium chloride, calcium magnesium acetate, and sand, may be regulated by environmental laws. Potential regulations include mandatory chemical reporting, restrictions on stored quantities, and permits or requirements for onsite storage areas.
Regardless of location, sites that order or store deicing/anti-skid products must:
1. Cover deicing/anti-skid product piles stored onsite (i.e., store materials under shelter, such as an awning, shed, or tarp), as required by the Postal Service™ Zero Discharge policy (see blue.usps.gov/cpim/ftp/policy/cso/cso06162016.pdf).
2. Never purchase or store quantities of deicing/anti-skid product in excess of 10,000 pounds at one site. Sites that store 10,000 pounds or more (including sand) are subject to Tier II Reporting (see blue.usps.gov/sustainability/environmental/tier-ii-reporting.htm).
Depending on your location, additional requirements may apply to your site. Contact your designated environmental specialist for assistance in determining your compliance obligations (see blue.usps.gov/sustainability/contact.htm).
— Environmental Compliance and Risk Management,
Office of Sustainability, 1-3-19
