A contractor is building a retirement community project. 30% of the building's product costs were derived from reused/salvaged materials or met recycled content criteria. Which of the following credits can the LEED AP submit towards certification?
Correct Answer: A
Explanation The Materials and Resources Credit, Building Product Disclosure and Optimization - Sourcing of Raw Materials rewards projects that use materials that have optimized extraction processes by limiting or eliminating the extraction of new resources, the reuse of materials or the use of recycled materials1. According to the LEED Reference Guide for Building Design and Construction2, the credit has two options: Option 1. Raw Material Source and Extraction Reporting and Option 2. Leadership Extraction Practices. Option 1 requires the project to use at least 20 permanently installed products from at least five different manufacturers that have publicly released a report from their raw material suppliers which include extraction locations, a commitment to long-term ecologically responsible land use, a commitment to reducing environmental harms from extraction and/or manufacturing processes, and a commitment to meeting applicable standards or programs voluntarily that address responsible sourcing criteria2. Option 2 requires the project to use products that meet at least one of the responsible sourcing criteria below for at least 25%, by cost, of the total value of permanently installed building products in the project: * Extended producer responsibility. Products purchased from a manufacturer (producer) that participates in an extended producer responsibility program or is directly responsible for extended producer responsibility. * Bio-based materials. Bio-based products must meet the Sustainable Agriculture Network's Sustainable Agriculture Standard. Bio-based raw materials must be tested using ASTM Test Method D6866 and be legally harvested, as defined by the exporting and receiving country. Exclude hide products, such as leather and other animal skin material. * Wood products. Wood products must be certified by the Forest Stewardship Council or USGBC-approved equivalent. * Materials reuse. Reused products must include salvaged, refurbished, or reused products. * Recycled content. Recycled content is the sum of postconsumer recycled content plus one-half the preconsumer recycled content, based on cost. Products meeting recycled content criteria are valued at 100% of their cost for the purposes of credit achievement calculation. * USGBC approved program. Other USGBC approved programs meeting leadership extraction criteria. Therefore, among the given options, only Option A is relevant to the use of reused/salvaged materials or recycled content, as they can contribute to the materials reuse or recycled content criteria under Option 2. Option B is a prerequisite that requires the project to develop and implement a construction and demolition waste management plan that identifies the materials to be diverted from disposal and whether the materials will be sorted on-site or co-mingled2. Option C is a credit that requires the project to use at least 20 different permanently installed products from at least five different manufacturers that use any of the following programs to demonstrate the chemical inventory of the product to at least 0.1% (1000 ppm): * Health Product Declaration. The end use product has a published, complete Health Product Declaration with full disclosure of known hazards in compliance with the Health Product Declaration Open Standard. * Cradle to Cradle. The end use product has been certified at the Cradle to Cradle v2 Basic level or Cradle to Cradle v3 Bronze level. * REACH Optimization. The end use product is compliant with REACH Optimization criteria. * GreenScreen v1.2 Benchmark. The product's chemical ingredients are inventoried using the GreenScreen v1.2 Benchmark. * Declare. The Declare product label must indicate that all ingredients have been disclosed down to 1000 ppm. Option D is a credit that requires the project to use at least 20 different permanently installed products that have environmental product declarations. The products must be sourced from at least five different manufacturers. The environmental product declarations must conform to ISO 14025, 14040, 14044, and EN 15804 or ISO 21930 and have at least a cradle-to-gate scope2. References: * LEED Reference Guide for Building Design and Construction v4 * Recycled content | U.S. Green Building Council * CS-v4.1 MRc3: Sourcing of Raw Materials | LEEDuser * How to choose the right materials for a LEED project? - GBCE
Question 222
Which of the following would be most useful to a school project that is attempting to pursue Water Efficiency Credit, Indoor Water Use Reduction?
Correct Answer: D
The Water Efficiency Credit, Indoor Water Use Reduction aims to reduce indoor water consumption by installing water-efficient fixtures and fittings, such as faucets, showerheads, toilets, and urinals1. A commercial dishwasher that is ENERGY STAR labeled or performance equivalent would help reduce the water use for dishwashing, which is one of the process water uses included in the credit calculation2. A standard garbage disposal would not reduce water use, but rather increase it. An electronic submeter at the domestic water supply pipe to the building would help measure and monitor water use, but not directly reduce it. An open-loop HVAC system that discharges potable cooling water to a nearby lake would waste a lot of water and potentially harm the environment.
Question 223
A core and shell project is located in a dense urban area that is known to have frequent fluctuations in the power supply grid (brown-outs). The project team is seeking LEED Platinum certification. Which credit should be pursued when considering the regional context?
Correct Answer: A
The credit that should be pursued when considering the regional context of frequent power supply grid fluctuations (brown-outs) is Energy and Atmosphere Credit, Demand Response. This credit encourages participation in demand response programs that reduce peak electricity demand and help stabilize the grid. It also provides an opportunity to earn regional priority points, which are bonus points for credits that address regional environmental issues. The other credits are not directly related to the regional context of brown-outs. Reference: * LEED V5BD+C Reference Guide, page 4151 * Demand response | U.S. Green Building Council2 * Regional Priority (RP) credits - U.S. Green Building Council3
Question 224
A LEED Building Design and Construction project includes an outdoor stage for theatrical performances. In pursuit of Sustainable Sites Credit, Light Pollution Reduction the engineer has specified an LED fixture to illuminate actors on the stage while limiting light pollution. Which of the following suggestions should the LEED AP give to the project owner?
Correct Answer: D
The Sustainable Sites Credit, Light Pollution Reduction aims to minimize the adverse effects of artificial lighting on the night sky, human health, and wildlife1. However, the credit does not apply to lighting that is required for safety, security, or emergency purposes2. According to the LEED Reference Guide for Building Design and Construction, lighting for theatrical performances is considered an emergency purpose and is exempt from the credit requirements3. Therefore, the LEED AP should inform the owner that the LED fixture is exempt from Sustainable Sites Credit, Light Pollution Reduction and does not need to be modified or compared to an alternative. Enclosing the performance areas would not reduce light pollution, but rather increase energy consumption and affect the outdoor experience. Calculating the return on investment over the 20-year life of the project is irrelevant to the credit and would not help achieve it.
Question 225
To ensure long-term energy efficiency and grid resilience, which strategy should the project team prioritise first?
Correct Answer: A
A high-performance building envelope should be prioritised because permanent reductions in heating and cooling demand improve efficiency and resilience under both normal and emergency conditions. Effective insulation, air sealing, high-performance glazing, solar control, and reduced thermal bridging lower peak loads and allow mechanical systems, renewable generation, batteries, and backup systems to be smaller and more effective. During an outage, a well-designed envelope also slows indoor temperature change and extends passive survivability. Demand-response participation helps the utility manage peak demand but does not correct excessive underlying building loads. Renewable Energy Certificates address the environmental attributes of purchased electricity but do not reduce actual consumption or improve physical resilience. Load reduction should therefore precede demand management and energy procurement.LEED v5 prioritises energy efficiency, decarbonisation, and resilience.
