Pilot Credit registration is required when documenting a LEED Pilot credit. This is to ensure that the project team has access to the latest pilot credit language and requirements, and that USGBC can track the usage and feedback of the pilot credits. The other options are not required for documenting a pilot credit, although they may be helpful or applicable for other credits.

According to the LEED v4 Reference Guide for Building Design and Construction, Option 1 of the Site Development - Protect or Restore Habitat credit requires restoring 25% of the site area (including the building footprint) with native or adapted vegetation 1 . To achieve exemplary performance, the project must double the credit requirements and restore 50% of the site area 2 . In this case, the site area is 100,000 ft2 (9 290 m2), so the project must restore 50,000 ft2 (4 645 m2) with vegetation. The project already has 35,000 ft2 (3 250 m2) of native vegetated open space, so it needs to add another 15,000 ft2 (1 395 m2) of vegetation. Since the on-grade surface is fully occupied by the building footprint and the asphalt parking, the only option is to incorporate a vegetated roof. Therefore, the design team will have to incorporate a native and/or adapted vegetated roof with a minimum area of 15,000 ft2 (1 395 m2). References : SS Credit Site Development - Protect or Restore Habitat, LEED v4 Reference Guide for Building Design and Construction 1 3

This option allows the project team to evaluate the impact of different window-to-wall ratios on the energy performance of the building, and to optimize the design accordingly. A simple box energy model is a preliminary analysis tool that can be used to compare different design alternatives and inform decision making in the early stages of the project12.

The best practice for using alternative water sources is to target the uses that require the least treatment first, such as irrigation, toilet flushing, and cooling tower makeup. This reduces the energy and cost associated with treating water to higher standards than necessary. Matching uses by location is not a requirement, nor is treating all alternative water sources to potable water standards. A project may use more than one alternative water source as long as they meet the applicable codes and standards. References : WE Credit Indoor Water Use Reduction, WE Credit Outdoor Water Use Reduction, WE Credit Cooling Tower Water Use 1

The answer is C. A high evapotranspiration rate will result in a higher demand for potable water use in irrigation. Evapotranspiration is the process by which water is transferred from the land to the atmosphere by evaporation from the soil and other surfaces and by transpiration from plants. The higher the evapotranspiration rate, the more water is lost from the soil and plants, and the more irrigation is needed to replenish the moisture. The other options will not increase the demand for potable water use in irrigation. A sparsely planted area will have less vegetation and less transpiration, reducing the water demand. A drip irrigation system will deliver water directly to the plant roots, minimizing evaporation and runoff, and saving water. A rainwater harvesting system will collect and store rainwater for irrigation, reducing the reliance on potable water sources. For more information on outdoor water use reduction and irrigation efficiency, you can refer to the LEED v4 Reference Guide for Building Design and Construction 1 or the WaterSense Water Budget Tool 2 .

LEED Building Design and Construction: Healthcare has additional appliance and process water requirements in Water Efficiency Prerequisite, Indoor Water Use Reduction

LEED Building Design and Construction: New Construction and LEED Building Design and Construction: Healthcare have the same Water Efficiency credits, except for the Cooling Tower Water Use credit, which is only applicable to the former. However, the Indoor Water Use Reduction prerequisite differs between the two rating systems, as the Healthcare version requires additional calculations for appliance and process water use, such as medical equipment, laundry, and kitchen equipment.

This option requires the project to provide safe collection, storage, and disposal for electronic waste, such as computers, monitors, printers, and batteries, because it contains hazardous materials that can harm human health and the environment if not handled properly1. Electronic waste can be recycled or reused by certified e-waste recyclers or manufacturers2.

The Integrative Process credit, Integrative Process, requires the project team to conduct a preliminary analysis of the energy and water related systems during the pre-design phase, and use the results to inform the design and construction of the project. The analysis must include at least two potential strategies for each of the following areas: site conditions, massing and orientation, basic envelope attributes, lighting levels, thermal comfort ranges, plug and process load needs, programmatic and operational parameters, outdoor water use, and indoor water use. The project team must also document how the analysis informed the owner’s project requirements, basis of design, and design documents.

The first step in earning the Water Efficiency (WE) Credit: Cooling Tower Water Use is to identify the maximum number of cycles of concentration for the cooling tower or evaporative condenser. This step establishes a baseline for water quality and helps determine potential water savings through maximizing the number of cycles, which minimizes water and chemical usage in cooling systems. Subsequent steps may involve chemical analysis (D) or exploring alternative water sources, but setting the cycles is the initial requirement.

The Whole Building Simulation option is used to meet the Energy and Atmosphere Prerequisite, Minimum Energy Performance for a hospital project. This option involves creating a detailed computer model of the building to simulate its energy performance and identify opportunities for improvement.