AgdaPkt 2004-03-22 - Laserfiche WebLink

Browse Search

�� City of Kedwood City Recycied Water Task Force Report March 3, 2004 3.1.4. Additional Water Conservation The City has several existing water conservation programs in place. The additional water conservation category consists of additional water conservation programs not included in the Urban Water Management Plan. Specifically, these are City-subsidized programs to prcmote voluntary (a) replacement of pre-rinse spray nozzles at food service providers, (b) installatio^ of evapotranspiration ("ET") controllers at large irrigation sites, and (c) installation of hot water recirculation pumps in homes. Information regazding these items provided by Dr. John Whitcomb and City staff is included in Attachment 4. Note that once the programs discussed below have achieved their targets, follow-up programs will likely be required to maintain the potable water demand reductions achieved. For example, when a water-saving device reaches the end of its useful life, it would need to be replaced with another water-saving device to maintain the reduction in potable water demand. In addition, the City may want to expand any hugely successful conservation programs to achieve even greater reductions in potable water demand than what is provided by the Alternative TF programs. 3.1.4.1. Pre-Rinse Spray Nozzles Prior to washing, restaurants, cafeterias, and other food service providers typically remove the majority of the food remaining on plates and trays using a pre-rinse water spray. According to Dr. Whitcomb, water-efficient versions of pre-rinse spray nozzles have recently become available. Alternative TF includes a program to replace existing pre-rinse spray nozzles with water-efficient versions. As part of this program, the City would provide and install water- efficient pre-rinse spray nozzles free of charge. The City would also market this service to all restaurants, cafeterias, and other food service providers within the City's water service area. Based on Dr. Whitcomb's assessment of potable water demand reduction per restaurant and an expected market penetration rate of 50 percent, this program is expected to reduce potable water demand by approximately 33 AF/Y. Dr. Whitcomb estimates the cost to the City of this program to be $7,000, based on cost-sharing provided by the Califomia Public Utilities Commission, which is sponsoring this program. Ahhough this program is not included as a Best Management Practice ("BMP") in the Urban Water Management Plan, the City has recently begun implementing it. Since the City has already begun implementing this program with existing funds, the cost of this progam is not included in the cost of Alternative TF. However, since it is not included in the Urban Water Management Plan, the resulting water savings are included in Altemative TF. 3.1.42. Evapotransniration Controllers The ET controllers program builds on the existing BMP 5 program in the Urban Water Management Plan. After installation, the ET controllers automatically adjust irrigation schedules based on environmental monitoring data (e.g., rainfall, temperature over the course of Page 7 of 12