Reso13 PC 13-09 2859 Initial Study Mitigated Negative Declaration Kensington

Browse Search

4.17 UTILITIES AND SERVICE SYSTEMS 4.17.1 Setting 4.17.1.1 Water Service The City receives potable water from the Hetch-Hetchy regional water system and recycled water from the South Bayside System Authority sub-regional wastewater treatment plant. The City's local water system service area is approximately 14 square miles and is operated by the Redwood City Public Works Services Department—Water Services Division. Redwood City draws its water from the regional water system pipelines at 13 metered connections. The City water distribution system is comprised of 262 miles of distribution mains, 10 pump stations, 2,385 fire hydrants, and 26 pressure reducing valve stations. The project site will be served by an existing water main in El Camino Real. The existing j ewelry store currently uses approximately 146 gallons of water per day (approximately the equivalent of a single-family house).38 The restaurant has been vacant since 2000 so no water usage was assumed. In addition,it is assumed that the remnant orchard is not irrigated. 4.17.1.2 Sanitary Sewer/Wastewater Treatment The City operates and maintains a sewer pipeline system comprised of 192 miles of sewer mains and 31 sewer lift stations.39 The system conveys wastewater to the South Bayside System Authority (SBSA) Wastewater Treatment Plant. After treatment,the wastewater is discharged through an outfall into the San Francisco Bay, as permitted by the San Francisco Regional Water Quality Control Board(RWQCB). The treatment plant operating capacity is 29 million gallons per day of average dry weather flow. Between June and October 2008,the average dry weather flow was 15.8 million gallons per day, or 54 percent of the treatment plant operating capacity. Even though the treatment plant currently operates well below capacity for dry weather flow,there are wet weather condition capacity issues due to rain and groundwater infiltration into the collection system. While Redwood City has wet weather condition problems,it is considered to be among the industry's average. The existing jewelry store generates approximately 124 gallons of wastewater per day.40 Because the restaurant does not currently have any water demand,no wastewater generation was assumed. 38 Oberg,John. City of San Jose. "Re: sq.ft.x coefficient." E-mail to David J.Powers and Associates,Inc. February 2004. Based upon a water use rate of 0.073 gallons/sq.ft./day for a retail establishment. 39 A sewer lift station is used to pump sewage or wastewater uphill from a low-lying neighborhood to a collection system of pipes. 40 Based upon 85 percent of total water usage. Kensington Assisted Living Facility Project 87 Initial Study Redwood City Apri12013