Appendix G. Utility Technical Report

Transcription

1 Appendix G

2 : Water and Energy PREPARED BY: KPFF Consulting Engineers 6080 Center Drive, Suite 750 Los Angeles, CA (310)

3 Table of Contents 1. INTRODUCTION PROJECT DESCRIPTION SCOPE OF WORK EXISTING CONDITIONS WATER SERVICE DOMESTIC FIRE ENERGY METHODOLOGY WATER ENERGY INFRASTRUCTURE CAPACITY CONSTRUCTION WATER ENERGY OPERATION WATER WATER CONSUMPTION FIRE WATER DEMAND DOMESTIC WATER DEMAND ENERGY... 6 Appendix Exhibit 1- SAR Reports (3) Exhibit 2- Los Angeles Department of Water and Power Will Serve Letter Exhibit 3- Southern California Gas Will Serve Letter Page i

4 1. INTRODUCTION 1.1. PROJECT DESCRIPTION The proposed (Project) consists of the construction of three new buildings and a new two-level, below-grade parking structure on a project site located at N. McCadden Place and Santa Monica Boulevard (the Project Site) in the Hollywood community of the City of Los Angeles (City). The Project Site includes approximately 2.67 acres of land bisected by N. McCadden Place. The portion of the Project Site on the west side of N. McCadden Place is located at N. McCadden Place (the West Site) and the portion of the Project Site on the east side of N. McCadden Place is located at N. McCadden Place and Santa Monica Boulevard (the East Site). The proposed Project includes a six-story senior housing building, a five-story youth housing building and a 1-4-story LGBT facility that includes a senior center, the youth center, administrative offices, accessory recreational space, and transitional living and emergency guestrooms. The senior housing building, the LGBT facility and the belowgrade parking would be developed on the East Site, while the youth housing building would be developed on the southern portion of the West Site located at 1119 N. McCadden Place (the Youth Housing Parcel), just south of the existing Village at Ed Gould Plaza (the Village), which is located on the northern portion of the West Site. The East Site is bound to the north by parking lots with commercial property beyond; to the east by N. Las Palmas Ave with commercial property (film/camera shops, laundromat, 7-11) beyond; to the south by Santa Monica Boulevard with commercial property beyond; and to the west by N. McCadden Place with commercial property beyond. The West Site is bound to the north by commercial property; to the east by N. McCadden Place; to the south by commercial property; and to the west by commercial property. The southern portion of the East Site is currently developed with one-story, brick office building that was constructed around 1952 and is currently utilized as office space by the Los Angeles LGBT Center. The Youth Housing Parcel is currently an asphalt-paved parking lot utilized by the LGBT Center. The north portion of the East Site is developed with asphalt-paved parking that extends from N. Las Palmas Ave to the east to N. McCadden Place to the west. Access to the East Site is via Santa Monica Boulevard to the south, N. Las Palmas Avenue to the east, and N. McCadden Place to the west. Access to the Youth Housing Parcel on the West Site is via N. McCadden Place to the east. Page 1

5 1.2. SCOPE OF WORK This report evaluates the capacity of the existing water and energy (electricity and natural gas) infrastructure serving the Project Site and determines whether the existing infrastructure can accommodate the Project. 2. EXISTING CONDITIONS 2.1. WATER SERVICE DOMESTIC Based on available record data provided by the City, there is a 12-inch water main in Santa Monica Boulevard, an 8-inch water main in Las Palmas Avenue, and a 4-inch water main in N. McCadden Place. Based on conversations with Los Angeles Department of Water and Power (LADWP), the domestic water for the existing office building on the East Site and the Village on the West Site are served off N. McCadden Place FIRE Fire sprinklers for the existing office building on the East Site are served off of Santa Monica Boulevard, while fire sprinklers for the Village are served off of N. McCadden Place. There are also existing fire hydrants in front of the property on Las Palmas Avenue, on the southwest corner of N. McCadden Place and Santa Monica Boulevard and the northwest corner of Las Palmas Avenue and Santa Monica Boulevard ENERGY Electrical service to the Project Site is provided by the LADWP. Based on conversations with the LADWP, the site receives power from power poles in Santa Monica Boulevard. Gas service to the Project Site is provided by Southern California Gas Company. Based on available record drawings, the gas company operates gas lines in N. McCadden Place and Santa Monica Boulevard. 3. METHODOLOGY 3.1. WATER To determine the capacity of the existing water infrastructure to serve the Project, this report compares the estimated Project water demand with the calculated available capacity of the existing water infrastructure. LADWP was also consulted in preparation of this report. Specifically, LADWP performed a flow test to determine if available water conveyance exists for future development. LADWP's approach consists of data ranging from available static pressure (meaning how Page 2

6 much pressure is available at the source before applying a project's demand), to the available pressure at the maximum demand needed for a project. Based on the results of the flow test, LADWP then determines whether or not it can meet the project's need based on the existing water infrastructure. The following has been considered as part of this analysis: 3.2. ENERGY Environmental Setting Description of major water infrastructure serving the Project Site, including the type of facilities, location and sizes, and any planned improvements Description of the water conditions for the project area and known improvement plans Project Infrastructure Impacts Review the project description and the information obtained from a review of the Environmental Setting (above) and Evaluation of Screening Criteria. Determine what improvements would be needed, if any, to adequately serve the Project. Describe the degree to which presently scheduled off-site improvements offset infrastructure needs. The Project Site will require an upgrade in the electrical service. The Project demands include the number of feeds, the overall estimated connected load, the need for a transformer, and placement of the transformer. The electrical engineer in coordination with the will serve letters from the gas company and LADWP will determine if sufficient capacity is available to serve the Project. 4. INFRASTRUCTURE CAPACITY 4.1. CONSTRUCTION WATER A water supply would be required during the construction of the Project for dust control, cleaning of equipment, excavation/export, removal and re-compaction, etc. However, this water use during construction would be limited and temporary. The water demand during construction of the Project would also be offset from removal of the existing office building on the East Site, which is currently operational and has associated water consumption. Therefore, it is anticipated that the existing water Page 3

7 infrastructure would meet the limited and temporary water demand associated with construction of the Project. The Project will require construction of new, onsite water distribution lines that would connect to the public main lines to serve the new buildings. Construction activities associated with the installation of water distribution lines would primarily involve trenching in order to place the water distribution lines below the surface and would be limited to onsite water distribution, together with minor offsite work associated with connections to the public main. No upgrades to public water mains are anticipated. Prior to ground disturbance, The project contractor would coordinate with LADWP to identify the locations and depth of all lines. Further, LADWP would be notified in advance of proposed ground disturbance activities to avoid water lines and disruption of water service ENERGY Electrical power would be consumed to construct the new buildings and facilities that comprise the Project. Electrical power would be supplied from existing electrical services within the Project Site or from a power pole in the adjacent streets and would not affect other services. Overall, demolition and construction activities would require minimal electricity consumption and it is anticipated that available electricity supplies and infrastructure, whether onsite or offsite, would meet the limited electricity consumption associated with construction of the Project. Construction of the Project would not involve the consumption of natural gas. Natural gas would not be supplied to support project construction activities, so there would be no demand for natural gas generated by construction. The Project would require construction of new onsite electrical and gas distribution facilities that would connect to existing main lines to serve the new buildings. Construction activities associated with the installation of the electrical and gas distribution facilities would primarily be confined to trenching and would be limited to onsite electrical and natural gas distribution, together with minor offsite work associated with connections to the main lines. No upgrades to the existing electrical and natural gas mains are anticipated. Prior to ground disturbance, the project contractor would coordinate with LADWP and the Southern California Gas Company to identify the locations and depth of all lines. LADWP and the Southern California Gas Company would also be notified in advance of proposed ground disturbance activities to avoid disruption of electrical and natural gas service. Page 4

8 4.2. OPERATION WATER WATER CONSUMPTION When analyzing the Project for infrastructure capacity, the projected demands for both fire suppression and domestic water are considered. Although domestic water demand is the Project s main contributor to water consumption, fire flow demands have a much greater instantaneous impact on infrastructure, and therefore are the primary means for analyzing infrastructure capacity. Nevertheless, conservative analysis for both fire suppression and domestic water flows has been completed by LADWP for the Project. See Exhibit 1 of this report for the results of the service advisory request (SAR) with respect to fire service pressure flow FIRE WATER DEMAND Based on fire flow standards set forth in Section of the LAMC for High Density Residential and Neighborhood Commercial, the Project would require fire flow of 4,000 gallons per minute (gpm) for four hydrants flowing simultaneously with a residual pressure of 20 pounds per square inch. This translates to a required flow of 1,000 gpm for each hydrant. A Service Advisory Request (SAR) was submitted to LADWP in order to determine if the existing public infrastructure could meet the demands of the Project. Exhibit 1 shows a static pressure of pounds per square inch in the area and that flows up to 1,400 gpm can be delivered to the Project Site with a residual pressure of up to 89 pounds per square inch, which far exceeds the 20 pounds per square inch requirement for the surrounding public hydrants. Furthermore, Section of the LAMC permits the use of supplemental fire protection equipment or systems, including the installation of an automatic fire extinguishing system, in lieu of the requirements of the Fire Code, in which case the project developer shall either conform to the requirements of the Fire Code or install such supplemental equipment or systems. In accordance with these provisions, the Project will incorporate seperate fire sprinkler suppression systems for each site to reduce or eliminate the public hydrant demands, which will be subject to fire department review and approval during the design and permitting of the Project. The plumbing engineer has estimated the fire sprinkler demand to be approximately 1,000 gpm for the East Site and 750 gpm for the West Site. Based on pressure flow reports obtained from LADWP (see Exhibit 1), the existing public infrastructure can deliver flows up to 1,400 gpm with a residual pressure of up to 89 psi. Therefore, LADWP would be able to supply sufficient flow and pressure to satisfy the needs of the fire suppression Page 5

9 for the Project. As stated above, Exhibit 1 shows that LADWP can supply sufficient flow and pressure to satisfy that demand DOMESTIC WATER DEMAND Based on fixture units and type of use, the domestic demand for the Project has been estimated by the plumbing engineer to be a total of 320 gpm spread for all of the buildings. The approved SARs for the three adjacent streets confirm that sufficient capacity is available for the Project, regardless of where the connections are made. The Project includes a 3 domestic water connection to the existing water main in N. McCadden Place, a 4 domestic water connection to the existing water main in Santa Monica Boulevard and a 3 domestic water connection to the existing water min in N. Las Palmas Avenue. The service laterals will be adequately sized to accommodate the fire demand and domestic demand flowing simultaneously. In addition, the services will include backflows and be metered separately per City requirements ENERGY The Project would result in an increase in electrical demand in comparison with existing conditions on the Project Site. Will serve request letter were sent to LADWP to determine if there is sufficient capacity to serve the Project. The responses from LADWP (see Exhibit 2) state that electric service will be available for the Project and that the estimated power requirement for the Project is part of the total load growth forecast of the City and has been taken into account in the planned growth of the power system. The Project will also increase the demand for natural gas in comparison with existing conditions on the Project Site. A will serve request letter was sent to the Southern California Gas Company (SGC)to determine if there is sufficient capacity to serve the Project. The response from SCG (see Exhibit 3) states that there are currently gas facilities in the area available for the Project. Page 6

10 EXHIBIT 1 SAR Page 7

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13 City of Los Angeles Los Angeles Department of Water and Power - Water System Fire Service Pressure Flow Report SAR NUMBER SERVICE NUMBER For: 1119 N MCCADDEN PL Approved Date: Proposed Service 6 INCH off of the 4 inch main in MCCADDEN PL on the WEST side approximately 231 feet NORTH of NORTH of SANTA MONICA BLVD The System maximum pressure is 130 psi based on street curb elevation of 302 feet above sea level at this location. The distance from the DWP street main to the property line is 28 feet System maximum pressure should be used only for determining class of piping and fittings. Residual Flow/Pressure Table for water system street main at this location Flow (gpm) Press. (psi) Flow (gpm) Press. (psi) Flow (gpm) Press. (psi) These values are subject to change due to changes in system facilities or demands. Meter Assembly Capacities Domestic Meters 1 inch = 56 gpm 1-1/2 inch = 96 gpm 2 inch = 160 gpm 3 inch = 220 gpm 4 inch = 400 gpm 6 inch = 700 gpm 8 inch = 1500 gpm 10 inch = 2500 gpm Fire Service 2 inch = 250 gpm 4 inch = 600 gpm 6 inch = 1400 gpm 8 inch = 2500 gpm 10 inch = 5000 gpm FM Services 8 inch = 2500 gpm 10 inch = 5000 gpm Notes: It is approved up to 1000 gpm which is the maximum available flow. This information will be sent to the Department of Building and Safety for plan checking. This SAR is valid for one year from Once the SAR expires, the applicant needs to re-apply and pay applicable processing fee. For additional information contact the Water Distribution Services Section WESTERN (213) ELIA SUN Prepared by ELIA SUN Approved by Water Service Map

14 EXHIBIT 2 LOS ANGELES DEPARTMENT OF WATER AND POWER WILL SERVE LETTER Page 8

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17 EXHIBIT 3 SOUTHERN CALIFORNIA GAS WILL SERVE LETTER Page 9

18 November 20, 2015 Attn: Dustin James KPFF Consulting Engineers 6080 Center Dr., Suite 700 Los Angeles, CA RE: Will Serve Letter Request for Job ID# : 1119 McCadden Pl. Los Angeles, CA Dear Sir/Madam: Thank you for inquiring about the availability of natural gas service for your project. We are pleased to inform you that Southern California Gas Company (SoCalGas) has facilities in the area where the above named project is being proposed. The service would be in accordance with SoCalGas policies and extension rules on file with the California Public Utilities Commission (Commission) at the time contractual arrangements are made. This letter should not be considered a contractual commitment to serve the proposed project, and is only provided for informational purposes only. The availability of natural gas service is based upon natural gas supply conditions and is subject to changes in law or regulation. As a public utility, SoCalGas is under the jurisdiction of the Commission and certain federal regulatory agencies, and gas service will be provided in accordance with the rules and regulations in effect at the time service is provided. Natural gas service is also subject to environmental regulations, which could affect the construction of a main or service line extension (for example, if hazardous wastes were encountered in the process of installing the line). Applicable regulations will be determined once a contract with SoCalGas is executed. If you need assistance choosing the appropriate gas equipment for your project, or would like to discuss the most effective applications of energy efficiency techniques, please contact our area Service Center at Thank you again for choosing clean, reliable, and safe natural gas, your best energy value. Sincerely, Pedro Reyes Pipeline Planning Associate Compton Headquarters