NR 106.90(2)(2) Tier 1 source reduction measures are those voluntary source reduction activities that identify and quantify chloride and softened water sources and usage, educate users and system operators on the need to minimize salt and softened water demands and promote better housekeeping practices that will reduce chloride and softened water consumption, and other activities similar in nature. Tier 1 source reduction measures may include any of the following: NR 106.90(2)(a)2.2. Educate homeowners on the impact of chloride from residential softeners, discuss options available for increasing softener salt efficiency, and request voluntary reductions. NR 106.90(2)(a)4.4. Request voluntary support from local water softening businesses in the efforts described in subds. 2. and 3. NR 106.90(2)(a)5.5. Educate licensed installers and self-installers of softeners on providing optional hard water for outside faucets for residences. NR 106.90(2)(a)6.6. Request voluntary reductions in chloride input from industrial and commercial contributors. NR 106.90(2)(a)7.7. Where a public water utility has been identified as a significant contributor of chloride to the sewer system, request that the water utility conduct activities listed in par. (b). NR 106.90(2)(b)(b) For direct-discharging municipal or commercial water softening plants: NR 106.90(2)(b)1.1. Identify the users of soft water or the processes using soft water, and the amounts they use. NR 106.90(2)(b)2.2. Determine which users or processes can tolerate unsoftened water, and determine their impact on demand. NR 106.90(2)(b)3.3. Determine which users can close-loop their once-through cooling system or which processes can be close-looped, and determine their impact on demand. NR 106.90(2)(c)(c) For dairies, train plant personnel to be more aware of salt conservation, emphasizing simple, cost effective housekeeping measures. For example, spilled salt can be cleaned up as a solid waste rather than flushed down the floor drain. NR 106.90(2)(d)2.2. Optimize softener operation to ensure the appropriate regeneration interval and salt dosage are used. NR 106.90(2)(e)(e) For any other facility not listed in pars. (a) to (d), conduct activities that identify and quantify chloride and softened water sources and usage and educate personnel on appropriate housekeeping practices and the need to minimize salt and softened water demands. NR 106.90(3)(3) Tier 2 source reduction measures are those voluntary source reduction activities that improve and optimize equipment and processes, encourage restricted chloride use by users, eliminate wasteful practices and establish recycling practices where feasible, and other activities similar in nature. Tier 2 source reduction measures may include any of the following: NR 106.90(3)(a)1.1. Require significant industrial and commercial contributors to evaluate their water treatment systems with regard to softened water requirements, with the results of that evaluation being the basis for potential restrictions of chloride inputs. NR 106.90(3)(a)2.2. Mandate a DIR and high salt efficiency standard for new residential softeners. NR 106.90(3)(a)3.3. Mandate participation in a residential softener tune-up program, which involves qualified periodic servicing to ensure proper control settings and adjustments. NR 106.90(3)(a)4.4. Where a public water utility has been identified as a significant contributor of chloride to the sewer system, request that the water utility conduct activities listed in par. (b). NR 106.90(3)(b)(b) For direct-discharging municipal or commercial water softening plants: NR 106.90(3)(b)1.1. Optimize softener operation to ensure the appropriate regeneration interval and salt dosage are used. NR 106.90(3)(b)2.2. If the regeneration is manual or timer-initiated, switch to a DIR controller.