A107. WATER RESOURCE CONSERVATION AND EFFICIENCY

A107 WATER RESOURCE CONSERVATION AND EFFICIENCY Strike Table A107 in Appendix A of the International Green Construction Code in its entirety and insert new Table A107 in Appendix A of the Green Construction Code in its place to read as follows: TABLE A107 WATER RESOURCE CONSERVATION AND EFFICIENCY PROJECT ELECTIVES SECTION DESCRIPTION MINIMUM NUMBER OF ELECTIVES REQUIRED AND ELECTIVES SELECTED A107.2 Onsite waste water treatment Yes No A107.3 Alternate onsite nonpotable water for outdoor hose connections and irrigation Yes No A107.4 Alternate onsite nonpotable water for plumbing fixture flushing Yes No A107.7 Alternate onsite nonpotable water for industrial process makeup water Yes No A107.8 Alternate onsite nonpotable water for cooling tower makeup water Yes No A107.9 Gray water collection Yes No A107.10 Condensate drainage recovery Yes No A107.11 Wet-hood exhaust scrubber system Yes No Strike Section A107.3 in Appendix A of the International Green Construction Code in its entirety and insert new Section A107.3 in Appendix A of the Green Construction Code in its place to read as follows: A107.3 Alternate onsite nonpotable water for outdoor hose connections and irrigation project elective. Where projects are intended to qualify for an alternate onsite nonpotable water for outdoor hose connections and irrigation project elective in accordance with Section A107.3, sillcocks, hose bibs, wall hydrants, yard hydrants, and other outdoor outlets or any connection used for irrigation shall be supplied by nonpotable water providing 50 gallons of storage per 250 square feet of landscaping. Any irrigation system for the project site shall be controlled by a qualifying smart controller that uses evapotranspiration (ET) and weather data to adjust irrigation schedules or an on-site rain or moisture sensor that automatically shuts the system off after a predetermined amount of rainfall or sensed moisture in the soil. Qualifying smart controllers shall be tested in accordance with IA SWAT Climatological-Based Controllers 8th Draft Testing Protocol. Smart controllers that use ET shall use the following inputs for calculating appropriate irrigation amounts: Irrigation adequacy—80 percent minimum ETc. Irrigation excess—not to exceed 10 percent. Exception: A temporary potable water irrigation system used exclusively for the establishment of new landscape shall be exempt from this requirement. Temporary potable water irrigation systems shall be removed or permanently disabled at such time as the landscape establishment period has expired. Projects shall have a minimum of 3 percent of site covered in landscaping to achieve the elective. Intensive green roofs or roof portions are allowed to count towards this credit. Extensive green roofs are not allowed to count towards this elective. Strike Sections A107.4.1 through A107.4.3 in Appendix A of the International Green Construction Code in their entirety without substitution. Strike Sections A107.5, A107.5.1, A107.5.2, and A107.5.3 in Appendix A of the International Green Construction Code in their entirety without substitution. Strike Sections A107.6, A107.6.1, and A107.6.2 in Appendix A of the International Green Construction Code in their entirety without substitution. Strike Section A107.8 in Appendix A of the International Green Construction Code in its entirety and insert new Section A107.8 in Appendix A of the Green Construction Code in its place to read as follows: A107.8 Alternate onsite nonpotable water for cooling tower makeup water project elective. Where projects are intended to qualify for an alternate onsite nonpotable water for cooling tower makeup water project elective in accordance with Section A107.7, nonpotable water shall be utilized for cooling tower makeup water in accordance with the requirements of Section 703.7. Strike Section A107.9 in Appendix A of the International Green Construction Code in its entirety and insert new Section A107.9 in Appendix A of the Green Construction Code in its place to read as follows: A107.9 Gray water collection project elective. Where projects are intended to qualify for a gray water collection project elective in accordance with Section A107.8, waste water from lavatories, showers, bathtubs, clothes washers, and laundry trays shall be collected for reuse onsite. Insert new Sections A107.10 and A107.11 in Appendix A of the Green Construction Code to read as follows: A107.10 Condensate drainage recovery. Projects that are pursuing a condensate drainage recovery project selective shall collect 100 percent of condensate for reuse in applications such as water features, fountains, gray water collection systems and rainwater collection systems. A107.11 Wet-hood exhaust scrubber systems. Where wet-hood exhaust scrubber systems are used, projects that are pursuing this elective shall incorporate a water recirculation system. The makeup water supplies for such systems shall be metered in accordance with Section 705.1. A107.11.1 Washdown systems. Hoods incorporating washdown or rinsing systems for perchloric acid and similar chemicals shall utilize self-closing valves. Such systems shall be designed to drain automatically after each washdown process has been completed. A107.11.2 Water sources. Where suitable alternate onsite nonpotable water is available, makeup water supplies to the recirculation system of wet-hood exhaust scrubbers shall utilize alternate onsite nonpotable water or municipal reclaimed water of a water quality appropriate for the application. SOURCE: Final Rulemaking published at 67 DCR 6509 (May 29, 2020 – Part 2). The District of Columbia Green Construction Code (2017), referred to as the “Green Construction Code,” consists of the 2012 edition of the International Green Construction Code (International Green Construction Code), published by the International Code Council (ICC), as amended by the District of Columbia Green Construction Code Supplement of 2017 (12-K DCMR). The International Green Construction Code is copyrighted by the ICC and therefore is not republished here. However, a copy of the text may be obtained at: https://codes.iccsafe.org/public/document/toc/548/. District of Columbia Municipal Regulations Green Construction Code Supplement of 2017 12-K DCMR § A107