APPENDIX J WATER AND SEWER UTILITIES

Transcription

1 APPENDIX J WATER AND SEWER UTILITIES

2 J.1 Water Study Domestic and Emergency Fire

3 PROJECT SITE: W. Santa Monica Blvd Los Angeles, California APN: ( ) Vesting Tentative Tract Map No Environmental Impact Report No. ENV EIR PREPARED FOR: SM Properties, LLC 2200 Biscayne Boulevard Miami, Florida Tel: (305) PREPARED BY: Saticoy Street Van Nuys, California Tel: JN: APRIL 13, 2011 REVISION 1, JUNE 3, 2011 Water Study / Domestic and Emergency Fire.

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5 WATER SUPPLY STUDY (DOMESTIC) Introduction The following section addresses the potential impacts of the proposed Santa Monica Blvd project or project site on water supply and service relating to domestic use. The city of Los Angeles Department of Water and Power provided information included in this section. Existing Conditions Currently, the project site has (2)-two twelve inch water lines that join approximately 25-feet north of the property line on Santa Monica Blvd with a water capacity at least 6,000 gallons per minute with 30 psi residual flowing 4 nearby hydrants simultaneously. The city of Los Angeles, Department of Water and Power has indicated it will serve the proposed project domestic and emergency fire water needs. Based on contacts with the Department of Water & Power, a 60-inch water main exists on Century Park East, which will connect to the Century City water system via a regulation station in the vicinity of Century Park East and Galaxy Way (see page 10). Once the regulation system is operational it is estimated that amount of water available will be approximately double what it is today. This connection is in the Department s budget and funded for construction to start around early 2012 and is scheduled to be completed around June 2012 (see page 11). Project Impacts Based on current, and future conditions, the proposed project will have enough water capacity to serve domestic water needs (See table 1 and 2 below). Even without the proposed regulation station. The proposed project may have conventional parking or automated parking. Table 1 and 2 below depicts both options. Table 1 Estimated Water Use for the Proposed Project with Conventional Parking Water use Factor (gpd/unit) Land Use Amount of Development Water Use (gpd) 1 bedroom Condo's 42 Units 120 5, bedroom Condo's 170 Units , bedroom Condo's 71 Units , Landscaping 33,388 Sq. Ft , Landscape Biofilter 5,858 Sq. Ft Lounge 5,881 Sq. Ft Parking 280,844 Sq. Ft , Gym 11,332 Sq. Ft , Total 58, Assumptions: Water Use (AF per Year) The Water Use Factors are from Sewer Generation Factors for Residential and Commercial Categories chart from the City of Los Angeles Bureau of Sanitation, dated Effective June 5, of 11

6 Table 2 Estimated Water Use for the Proposed Project with Automated Parking Land Use Amount of Development Water use Factor (gpd/unit) Water Use (gpd) Water (AF per Year) 1 bedroom Condo's 42 Units 120 5, Use 6 2 bedroom Condo's 170 Units , bedroom Condo's 71 Units , Landscaping 33,388 Sq. Ft , Landscape Biofilter 5,858 Sq. Ft Lounge 5,881 Sq. Ft Parking 166,128 Sq. Ft , Gym 11,332 Sq. Ft , Total 55, Assumptions: The Water Use Factors are from Sewer Generation Factors for Residential and Commercial Categories chart from the City of Los Angeles Bureau of Sanitation, dated Effective June 5, Mitigation Measures Based on our research and a Fire Service Pressure Flow Report from the City of Los Angeles Department of Water and Power, no further upgrades to the existing water line system will be required by the developer. The proposed project will mitigate any potential water increase by implementing the city of Los Angeles Department of Water and Power, Urban Water Mitigation Plan (UWMP) of 2005 water conservation measures. Cumulative Impacts Based on available information, the proposed project will have no significant cumulative impact on the surrounding area. 3 of 11

7 WATER SUPPLY STUDY (FIRE) Introduction The following section addresses the potential impacts of the proposed Santa Monica Blvd project or project site on water supply and service relating to emergency fire use. Information included in this section was provided by the Department of Water and Power and the Fire Department of the city of Los Angeles. Existing Conditions Currently, the project site has (2)-two twelve inch lines approximately 25-feet north of the property line on Santa Monica Blvd with a water capacity of at least 6,000 gallons per minute with 30 psi residual flowing 4 nearby hydrants simultaneously.. There is one existing fire hydrant on Santa Monica Blvd fronting the project site, which is approximately 100 feet East of the West properly line of the project. The City of Los Angeles Fire Department has requested one additional Fire Hydrant at the intersection of Santa Monica Blvd. and Moreno Drive. Project Impacts Based on current conditions, the proposed project will have enough water capacity to serve emergency fire needs with no additional upgrades, except for the addition of one.fire Hydrant at the intersection of Santa Monica Blvd. and Moreno Drive. Furthermore, Based on contacts with the Department of Water & Power, a 60-inch water main exist on Century Park East, which is planned be connected to the Century City water system by the Department of Water and Power, within the near future, via a regulation station in the vicinity of Century Park East and Galaxy Way (see page 10). Once the regulation system is operational it is estimated that amount of water available will be approximately double what it is today. This connection is in the Department s budget and funded for construction to start around February 2012 and is scheduled to be completed around June Mitigation Measures The Los Angeles Fire department will require (1)-one new fire hydrant at the intersection of Santa Monica Blvd and Moreno Drive to increase emergency fire flow. They will also require 4 nearby hydrants to be capable of producing 1500 gpm all flowing at the same time to produce a total of 6,000 gpm with at least 20 psi residual pressure. Under current conditions, but with the addition of the new hydrant at the corner of Santa Monica Boulevard and Moreno Drave, and without the proposed regulation station, this flow can be achieved (see DWP page 8). In addition, once operational, the regulation station will increase the flow to each of the fire hydrants serving the proposed project to an emergency flow in excess of the required which will be more than adequate for the proposed project. Based on our research, no further upgrades to the existing water line system will be required by the developer. Cumulative Impacts Based on available information, the proposed project will have no significant cumulative impact on the surrounding area. 4 of 11

8 APPENDICES 1. City of Los Angeles, Department of Water and Power, Will Serve Letter Water Availability dated: April 11, City of Los Angeles, Department of Water and Power, Service (SAR) 3. City of Los Angeles, Department of Water and Power, verifying the 6,000 gpm fire flow. 4. City of Los Angeles, Department of Water and Power, 8 ½ x 11 Water Plan 5. City of Los Angeles, Department of Water and Power, 8 ½ x 11 Sheet 1 of 2 sheets showing the proposed Century City Regulation Station 6. City of Los Angeles, Department of Water and Power Letter regarding the Pressure Regulator Station 5 of 11

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15 J.2 DWP Water Service Letter

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21 J.3 Wastewater/Sewer Study

22 PROJECT SITE: W. Santa Monica Blvd Los Angeles, California APN: ( ) Vesting Tentative Tract Map No Environmental Impact Report No. ENV EIR PREPARED FOR: SM Properties, LLC 2200 Biscayne Boulevard Miami, Florida Tel: (305) PREPARED BY: Saticoy Street Van Nuys, California Tel: JN: APRIL, 2011 REVISION 1 June 3, 2011 Wastewater / Sewer Study

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24 WASTEWATER / SEWER STUDY Introduction The purpose of this section is to assess the impacts of the proposed project on wastewater collection and treatment (Sewer). This section is based on comparisons of the projected service needs to the existing or anticipated level of service. Existing Conditions The City of Los Angeles Department of Public Works maintains the sewer collection and distribution system located throughout the city, with 6,500 miles of public sewers generating about 550 million gallons per day of flow with wastewater treatment conveyed to the city s wastewater treatment system. In addition, the proposed project would utilize a sewer conveyance system that would consist of, construction of approximately 250 lineal feet of new 8 inch sewer main line extending East from the existing sewer man hole on the former centerline of the South roadway of Santa Monica Blvd and the centerline of Century Park East, to a point opposite the Northwesterly corner of the subject property. This new main would connect to the 27 Westwood Relief Sewer in Century Park East which continues Southerly to the Hyperion Treatment Plant in Playa Del Rey. Hyperion Treatment Plant (HTP) treats wastewater for much of the City of Los Angeles, all wastewater from the City of Beverly Hills, Burbank, Culver City, El Segundo, Glendale, San Fernando, Santa Monica, and portions of unincorporated Los Angeles County. Hyperion Treatment Plant is located in Playa Del Rey with treatment capacity expanded in1998 to handle 550 million gallons of wastewater per day. Currently, HTP is the largest of four wastewater treatment plants in the area surrounding the City of Los Angeles. The flow to HTP is approximately 410 million gallons of wastewater per day. Project Impacts The city of Los Angeles sewer conveyance system has adequate capacity to meet the proposed project needs of roughly 55,500 gallons of average flow per day (see Sewer Availability Request 04/06/2011, page 6) The proposed project may have conventional parking or automated parking. Table 1 and 2 below depicts both options. 2 of 8

25 Table 1 Estimated Wastewater Use for the Proposed Project with Conventional Parking Land Use Amount of Development Wastewater Generation Factor (gpd/unit) Average Wastewater Generation (gpd) Peak Wastewater Generation (gpd) 1 bedroom Condo's 42 Units 120 5,040 8, bedroom Condo's 170 Units ,200 46, bedroom Condo's 71 Units ,200 24,140.0 Lounge 5,881 Sq. Ft Parking 280,467 Sq. Ft ,609 9,535.9 Gym 11,332 Sq. Ft , Total 55,353 89,287 Assumptions: The Water Use Factors are from Sewer Generation Factors for Residential and Commercial Categories chart from the City of Los Angeles Bureau of Sanitation, dated Effective June 5, Peak Wastewater is estimated to be 1.7 times the average daily wastewater generation. Table 2 Estimated Wastewater Use for the Proposed Project with Automated Parking Land Use Amount of Development Wastewater Generation Factor (gpd/unit) Average Wastewater Generation (gpd) Peak Wastewater Generation (gpd) 1 bedroom Condo's 42 Units 120 5,040 8, bedroom Condo's 170 Units ,200 46, bedroom Condo's 71 Units ,200 24,140.0 Lounge 5,881 Sq. Ft Parking 166,128 Sq. Ft ,323 5,648.4 Gym 11,332 Sq. Ft , Total 53,066 85,399 Assumptions: The Water Use Factors are from Sewer Generation Factors for Residential and Commercial Categories chart from the City of Los Angeles Bureau of Sanitation, dated Effective June 5, Peak Wastewater is estimated to be 1.7 times the average daily wastewater generation. 3 of 8

26 Mitigation Measures Based on current and future conditions, the City of Los Angeles Department of Public Works sewer collection and distribution system has available capacity to serve the proposed project Cumulative Impacts Based on available information, the proposed project will have no significant cumulative impact on the surrounding area. 4 of 8

27 APPENDICES 1. Sewer Availability Request dated: April 6, City of Los Angeles, Department of Public Works, 8 ½ x 11 Sewer Plan 3. Layout of the proposer new Sanitary Sewer to serve the proposed project. 5 of 8

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