DRAFT GreenPoint Rated Existing Home Rating Manual version 6.0 | Page 32

D

Structural Frame and Building Envelope INTENT To reduce water consumption and promote healthier plants by matching water use with plant water needs. Three Inches of Mulch in Planting Beds” are prerequisites for this measure. Up to two points of credit are available if the landscape includes an irrigation system whose water budget meets one of the following thresholds: ? ? ? 0.65 Reference Evapotranspiration (ETo)—One point ? 0.50 ETo—Two points

The landscape professional must do the following: ? ? ? ? Estimate the amount of water that will be needed by a particular landscape design on a specific site Use an approved methodology provided in the Updated Model Water Efficient Landscape Ordinance AB 1881 or a local water efficient landscape ordinance Ensure that the design can be compared to a water budget Ensure the water budget is met by incorporating hydrozoning, high efficiency irrigation, a native plant palette, and other best practices.

VERIFICATION Field Verification: The Rater will complete field compliance verification for design elements of this measure and all prerequisites, and take photos of landscape areas. Documentation: The Rater will collect the following: ? ? INTENT To design a landscape that uses a performance approach based on site-specific conditions to significantly reduce irrigation needs. An Accountability Form signed by the landscape architect or irrigator Calculations demonstrating the ETo level of the project

C11. ENVIRONMENTALLY PREFERABLE SITE MATERIALS
CRITERIA FOR QUALIFICATION Up to two points are available, as follows: C11.1. Environmentally Preferable Site Furnishings (1 Point) One point of credit is available for using one or more varieties of environmentally preferable materials for 70% of the installed non-plant landscape elements, such as: ?? ??
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