Date
Inquiry

We would like to submit the following inquiry: will utilizing well system for irrigation of the landscaped portion of the school project\'s site qualify for "innovative performance"? The credit intent is to utilize well pumping water for irrigation from ground water aquifer instead of providing water for irrigation from storm water basins, so the storm water basins area can be utilized as a green space, except during rain. Although designed on the site dry storm water basins can be easily utilized as water detention ponds collecting rainwater to irrigate selective landscaped areas (playfields), the water well was used instead for this purpose. The following are requirements for "Innovative Performance" and description, how the proposed design\'s approach would meet these requirements: 1. Quantitative performance improvements. Location of the well in the middle of the playfields minimizes the irrigation piping. Ground water aquifer allows continuous, uninterrupted supply of filtered water. In the pumphouse adjacent to the well there is on-demand irrigation controller and AC Tech Variable Frequency Speed motor drive which controls well pumps. Both of these controllers allow for easy interface between the ground water well supply and the irrigation demand read by the irrigation controller\'s soil moisture sensors. 2. Comprehensive process and specification: Well system for irrigation addresses other aspects of the project in addition to irrigation. In the baseline approach, the source of irrigation would be rainwater collected in storm water basins - detention ponds. These standing water ponds would need to be enclosed for safety reasons on school premises, they could be also a breeding ground for mosquitoes, foreign matters collection and prone to contamination. By utilizing well for irrigation the dry storm water basin areas can be treated as green spaces at any time except for rain. They can be used for educational purposes such as play areas, PE practice fields, marching band practice, science projects, amphitheater and other uses. Also the green grassy spaces will generate more CO2 and will have direct positive benefit to the environment. The calculations that show water well system is sufficient and necessary supporting data will be provided as a part of credit submittal. 3. The credit is applicable to all other projects where climatological, soil and ground water data prove it viable.

Ruling

No, utilizing well pumping water for irrigation from ground water aquifer does not qualify as innovative performance. The credit intent of WEc1, Water Efficient Landscaping, is to "limit or eliminate the use of potable water, or other natural surface or subsurface water resources available on or near the project site, for landscape irrigation". In addition, NC v2.2 WEc1 CIR ruling dated 9/19/2006 and NC v2.1 WEc1.2 CIR rulings dated 1/20/2004 and 11/5/2005 all state that the use of surface water or water drawn from receiving waters is not an acceptable way to meet the credit intent. Applicable Internationally.

Internationally Applicable
On
Campus Applicable
Off
Credits