Hotel Water Conservation A Seattle Demonstration Prepared for: Seattle Public Utilities Resource Conservation Section By: O’Neill & Siegelbaum and The RICE Group July 2002 Seattle Public Utilities (SPU) would like to thank the project team, which collaborated with SPU during the course of this project. Project Manager: Philip Paschke Seattle Public Utilities 710 Second Avenue Seattle, WA. 98104 (206) 684-5883
[email protected] Engineering Analysis: Roger E. van Gelder, P.E. The RICE Group 19015 35th Avenue West, Suite A Lynnwood, WA. 98036 (425) 774-3829 Behavioral, Education and Industry Analysis: Heidi Siegelbaum O’Neill & Siegelbaum 3018 NW 85th Street, Suite 5 Seattle, WA. 98117 (206) 784-4265
[email protected] Terms used in this report: GPM is gallons per minute and is the unit used to express instantaneous water use. GPF is gallons per flush and is the unit used to express water use per toilet or urinal flush GPD is gallons per day and is the unit used to express water use for an identified function over a 24- hour period. CCF is one hundred cubic feet of water and is equal to 748 gallons. Cycles of concentration is a measure of the water efficiency of a cooling tower and is the ratio of total water used by the tower vs. water sent to waste. It is commonly computed by dividing the conductivity reading for the sump water by the conductivity reading for the incoming (makeup) water. ii Executive Summary I. Purpose: The purpose of the Hotel Water Conservation Pilot was to evaluate the effectiveness of combining an engineering approach with a behavioral/educational approach and to identify water use patterns and opportunities for water conservation in a selection of Seattle hotels.