The United States Department of Agriculture (USDA), Animal Plant & Health Inspection Service (APHIS), AMS-National Science Laboratories in Gastonia, NC requests both a hydrogen and nitrogen generator.... The United States Department of Agriculture (USDA), Animal Plant & Health Inspection Service (APHIS), AMS-National Science Laboratories in Gastonia, NC requests both a hydrogen and nitrogen generator. Unit price(s) must include all costs associated with performing all work required in a complete and acceptable manner.