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Timestamp: 2018-12-10 15:57:04
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Water Conservation and the State s New Green Building Code for Residential Construction - PDF
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1 Water Conservation and the State s New Green Building Code for Residential Construction Silver Sponsors Media Sponsors Certified Sponsors Solano County Water Agency Zone 7 Water Agency Founding Partners Bay Area Water Supply & Conservation Agency The City of Redwood City of Vallejo City of Napa Water Division City of San José Environmental Services Contra Costa Water District East Bay Municipal Water District Marin Municipal Water District San Francisco Public Utilities Commission Santa Clara Valley Water District Solano County Water Agency Sonoma County Water Agency Soquel Creek Water District Zone 2 7 Water Agency
2 Overview Housing and Community Development (HCD) Title 24 and the California Green Building Code Application of the California Green Building Code Development of the California Green Building Code Mandatory water related measures Tiers and voluntary water related measures 3 Three Divisions Division of Financial Assistance Administers more than 20 programs awarding loans and grants to hundreds of local public agencies, private nonprofit and for profit housing developers, and service providers every year. This money supports the construction, acquisition, rehabilitation and preservation of affordable rental and ownership housing, child care facilities, homeless shelters and transitional housing, public facilities and infrastructure, and the development of jobs for low income workers. Division of Housing Policy Development Provides leadership, policies and programs to preserve and expand safe and affordable housing opportunities and promotes strong communities for all Californians. Division of Codes and Standards Administers the following seven programs: 4
3 Occupational Licensing Enforces State laws and regulations governing the sale or lease of manufactured homes, mobilehomes, and/or commercial coaches, including the licensing of manufacturers, distributors, dealers, and salespersons. The program also performs functions on behalf of the Mobilehome Ombudsman related to investigating and resolving consumer complaints pertaining to manufactured housing. Manufactured Housing Assists with the development and enforcement of preemptive federal and state regulations establishing minimum design and construction standards for manufactured homes, multiunit manufactured housing, commercial coaches and special purpose commercial coaches sold, offered for sale, rented, or leased within the State. Inspections are conducted and the Department Insignias of Approval are issued to indicate compliance. Factory Built Housing Promotes preemptive regulations establishing construction standards for factory built homes and factory built building components manufactured for sale or use within the State. Inspections are conducted and complying homes or components are issued a Department Insignia of Approval. 5 Registration and Titling Maintains title and registration records and collects fees and taxes on manufactured homes, mobilehomes, commercial modulars, floating homes, and truck campers. Mobilehome Parks Promulgates preemptive statewide regulations for the construction, use, maintenance and occupancy of all privately owned mobilehome and special occupancy parks in the State, as well as the installation of manufactured homes and mobilehomes both in and outside of parks. Directly, or through local governments, inspects and issues permits for park operation. Employee Housing Program Promulgates statewide regulations for the maintenance, use, and occupancy of privatelyowned and operated employee housing facilities providing housing for five or more employees to assure their health, safety, and general welfare. Directly, or through local governments, inspects and issues permits for facility operation. 6
4 State Housing Law The SHL was enacted to protect the health, safety and general welfare of the public and occupants of dwelling units in the State of California. Under this authority, HCD promulgates building standards and regulations to ensure that hotels, motel, apartments, single family dwellings, and other residential buildings are constructed and maintained in compliance with the model building codes and other provisions of State law. 7 HCD Authority Hotels, Motels Lodging Houses Apartment Houses Dwellings Homeless Shelters Monasteries, Convents Employee Housing Factory Built Housing 8
5 HCD Amends and Proposes the following Codes for Adoption into Title 24: Part 2 California Building Code Part 2.5 California Residential Code Part 3 Part 4 Part 5 California Electrical Code California Mechanical Code California Plumbing Code Part 10 California Existing Building Code Part 11 California Green Building Standards Code CALGreen Code Mandatory effective date for most measures concurrent with 2010 California Codes Effective date is January 1, 2011 Mandatory effective date for Water Conservation measures Effective July 1, 2011 Concerns over availability of fixtures and performance 10
6 Published Resources Reviewed during Development National Association of Home Builders Guidelines Leadership in Energy and Environmental Design Build It Green California Green Builder Program Draft ASHRAE Standard 189P 11 Air Resources Board California Energy Commission Department of Resources, Recycling and Recovery Department of General Services Department of Public Health Department of Water Resources Building Officials Representatives from the Construction Industry Representatives from International Building Code Writing Bodies Representatives from the Environmental Community 12
7 13 Scope Newly constructed residential buildings. Three stories or less in height. Does not currently apply to renovation or additions. 14
8 Appendices Are not mandatory unless adopted by state agency. Are not mandatory unless adopted by local government. 15 Local Modification Local government may make modifications. Justification for making local modifications. Climate Topography Geology Local environmental conditions established by the city, county or city and county are included in this criteria. 16
9 Tiers Voluntary unless adopted by local government. Intended to provide a consistent statewide method to further enhanced building practices. Appendices align with mandatory chapters. Chapter 4 and 4A for residential, Chapters 5 and 5A for nonresidential. Tiers have prerequisite and elective measures. 17 Five Divisions Division 4.1 Planning and Design Division 4.2 Energy Efficiency Division 4.3 Water Efficiency and Conservation Division 4.4 Material Conservation and Resource Efficiency Division 4.5 Environmental Quality 18
10 Storm water drainage and retention. Construction projects less than one acre are outside the scope of the California State Water Resources Control Board (SWRCB). Will help prevent flooding of adjacent property and prevent pollution from storm water runoff by retaining soil on site or by providing filtering to restrict sedimentation from reaching storm water drainage systems and receiving streams or rivers. Establishes criteria for a plan to manage storm water drainage during construction. 19 How to comply Storm water drainage and retention. Retention basin sized and shown on the site plan. Filtering storm water and routing to a public drainage system. Compliance with local storm water ordinance. 20
11 Surface Drainage. Requires planning of the surface drainage system that will serve the site. Requires the construction plans to indicate how surface drainage will be managed. 21 How to comply Storm water drainage and retention. Drainage system is shown on site plan. Swales Drain piping Retention areas Ground water recharge 22
12 % Water savings. Requires a 20% reduction of indoor water use. Provides a prescriptive and performance method. Mandatory effective date for 20% reduction is July 1, 2011 Concerns over availability of fixtures and performance 23 How to comply Method # % Indoor Water savings. Prescriptive Method Table Showerheads psi Lavatory Faucets psi Kitchen Faucets psi Urinals.5 gal/flush 24
13 How to comply method # % Indoor Water savings. Performance Method Use the performance calculation worksheets in Chapter 8 or other calculation acceptable to the enforcing agency Fixtures used in performance calculation are limited Water closets Urinals Lavatory Faucets Showerheads Multiple Showerheads Serving One Shower. When using the prescriptive method, the sum of multiple showerheads shall not exceed the flow rate specified in Table When using the prescriptive method, the maximum flow rate for each shower head shall not exceed psi. 26
14 Plumbing Fixtures and Fittings. Specifies acceptable performance standards for plumbing fixtures with reduced water usage Plumbing Fixtures and Fittings. Specifies acceptable performance standards for plumbing fixtures with reduced water usage. 28
15 How to comply Plumbing Fixtures and Fittings. Install a fixture which meets the standards listed in Table Obtain alternate approval from the enforcing agency for use of fixtures not listed Irrigation Controllers. Requires irrigation controls to be weather or soil moisture based and automatically adjust irrigation in response to changes in plants' needs as weather conditions change, or have rain sensors or communication systems that account for local rainfall. 30
16 How to comply Irrigation Controllers. Applies to controllers installed at time of final inspection Automatically delay watering cycle due to rain Can be communication based Can be based on plant watering needs Can be based on soil moisture 31 Residential Voluntary Measures Appendix A4. The appendix was developed in response to numerous stakeholders requesting a statewide consistent way to enhance the level of construction beyond the CALGreen minimum level. HCD has developed a tier based checklist which can be used by enforcing agencies wishing to go beyond the mandatory requirements of the code. HCD has also included a sample resolution that may be used during the local adoption process. 32
17 Tier 1 and Tier 2 Scope The measures contained in the appendix are not mandatory unless adopted by a city, county, or city and county. The provisions outline means of achieving enhanced construction or reach levels by incorporating additional green building measures above and beyond those mandatory minimum green building standards required of all new residential dwellings. In order to meet one of the tier levels designers, builders, or property owners are required to incorporate additional green building measures necessary to meet the threshold of each level. 33 Prerequisite Measures Tier 1 and Tier 2 thresholds require compliance with the mandatory provisions of this code and incorporation of the required prerequisite measures listed for Tier 1 and Tier 2. Prerequisite measures are also identified in the Residential Application Checklist. As specified in Section 101.7, additional prerequisite measures may be included by the enforcing agency to address specific local environmental conditions and may be listed in the Innovative Concepts and Local Environmental Conditions portions of the checklist. 34
18 Elective Measures In addition to the required mandatory minimum and prerequisite measures, Tier 1 and Tier 2 buildings must incorporate a specified number of elective measures. 35 Tier 1 1. Planning and Design (Division A4.1) Prerequisites: 1.1: Comply with the topsoil protection requirements. 1.2: Comply with the 20% permeable paving requirements. 1.3: Comply with the cool roof requirements. Electives: 1.4: Comply with at least two (2) elective measures selected from Division A
19 3. Water Efficiency and Conservation (Division A4.3) Prerequisites: 3.1: Comply with the reduced flow rate for kitchen sink faucets ( psi). 3.2: Comply with the Tier 1 potable water use reduction for landscape irrigation design. 65% of the reference envirotranspiration times the landscape area. Electives: 3.3: Comply with at least one (1) elective measure selected from Division A Tier 2 1. Planning and Design (Division A4.1) Prerequisites: 1.1: Comply with the topsoil protection requirements for Tier 1 and Tier : Comply with the 30% permeable paving requirements. 1.3: Comply with the cool roof requirements in (A ) Electives: 1.4: Comply with at least four (4) elective measures selected from Division A
20 3. Water Efficiency and Conservation (DivisionA4.3) Prerequisites: 3.1: Comply with the Tier 1 reduced flow rate for kitchen sink faucets ( psi). 3.2: Comply with the Tier 2 dishwasher requirements (ENERGY STAR 5.8 gallons per cycle). 3.3: Comply with the Tier 2 potable water use reduction for landscape irrigation ( 60% of the reference envirotranspiration times the landscape area). Electives: 3.4: Comply with at least two (2) elective measures selected from Division A Future Developments Training and education. Implementation and compliance aids. Outreach. Web based training. 40
21 Department s Website 41 Questions 42
22 Thank You for Attending Doug Hensel, Assistant Deputy Director, Division of Codes and Standards 43
Green Roofs for Water Conservation: Science, Policy and Market
Green Roofs for Water Conservation: Science, Policy and Market Haven Kiers, MLA, LEED AP, GRP, Green Infrastructure Foundation Beverly Powell MBA, PMP, CWM, Greening California Rooftops Silver Sponsors