Chapter 4 RESIDENTIAL MANDATORY MEASURES Division 4.3 Water Efficiency and Conservation
4.303.1 Twenty percent savings. Table 4.303.2 Fixture Fiow Rates
• Identifies methods used for calculation of water use as the “Prescriptive Method” and “Pertormance Method.”
• Clarifies that kitchen faucets may temporarily increase flow rate to 2.2 gpm, but must default back to 1.8 gpm.
• Recognizes the use of nonresidential lavatory faucets in residential applications.
4.303.2 Multiple showerheads serving one shower.
• Clarifies that flow rates apply to individual shower valves regardless of the number of showerheads connected to that valve.
Division 4.4 Material Conservation and Resource Efficiency
| 4.408.1 | Construction waste management. | 4.408.2 | Construction waste management plan. |
| 4.408.3 | Waste management company. | 4.408.4 | Waste stream reduction alternative. |
• Clarifies that compliance with, and submittal of, a construction waste management plan is one of the accepted methods for the
required 50% construction and demolition waste reduction.
• Clarifies that referenced materials are “construction and demolition vvaste” materials and adds “source separated” and “single stream” regarding on site waste sorting or mixing, respectively.
• Identifies additional methods for compliance, including a waste stream reduction method of compliance for projects generating
construction waste of 4 pounds or less per square foot of building area.
• Provides a reference to revised and newly developed sample Construction Waste Management forms to be maintained on
HCD’s website and available for download; and in the CALGreen Guide.
Division 4.5 Environmental Quality
4.504.1 Covering of duct openings and protection of mechanical equipment during construction.
• Clarifies application to ventilating equipment and to also reduce the amount of water which may enter the system.
4.504.3 Carpet systems.
• Updates an existing reference to the California Department of Public Health’s (CDPH) “Standard Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources Using Environmental Chambers”, Version 1.1, February 2010 (also known as Specification 01350) for purposes of testing and compliance.
4.504.4 Resilient flooring systems.
• Updates an existing reference to the CDPH’s Specification 01350 (see 4.504.3 above) and provides additional references for purposes of testing and compliance.
4.504.5.1 Documentation (for composite wood products)
• Recognizes products labeled and invoiced as meeting the California Air Resources Board’s Airborne Toxic Control Measure to
Reduce Formaldehyde Emissions from Composite Wood Products in theCaliforniaCode of Regulations.
• Recognizes exterior grade products meeting the PS-1 or PS-2 standards of the Engineered Wood Association, the Australian
AS/NZS 2269 or European 636 3S standards.
4.505.2 Concrete slab foundations.
• Identifies that requirements for vapor retarders in both the California Building Code and California Residential Code trigger the capillary break requirements of CALGreen.
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