I - 15 CORRIDOR CAMPUS MASTER PLAN DRAFT EIR MT. SAN JACINTO COMMUNITY COLLEGE DISTRICT. Appendices

Transcription

1 I - 15 CORRIDOR CAMPUS MASTER PLAN DRAFT EIR MT. SAN JACINTO COMMUNITY COLLEGE DISTRICT Appendices Appendix J Utility Systems Data August 2017

2 I - 15 CORRIDOR CAMPUS MASTER PLAN DRAFT EIR MT. SAN JACINTO COMMUNITY COLLEGE DISTRICT Appendices This page intentionally left blank. PlaceWorks

3 = Domestic Water System The Wildomar campus will be serviced with domestic water supplied by the Elsinore Valley Municipal Water District (EVMWD). On the west side of the site, it is proposed to tap a 10 water service pipe from an existing 16 water main at Clinton Keith Road. This service will branch into an 8 domestic water main and an 8 fire protection water main. On the east side of the site, it is proposed to tap an 8 water service pipe from an existing 8 water main at Clinton Keith Road. This service will branch into a 4 domestic water main and an 8 fire protection water main. Domestic water meters and backflow preventers will be located at the right-of-way. The domestic water supply system shall be designed and constructed in accordance with EVMWD s Standard Specifications and Drawings dated July For flow demand calculations, the standards require the following for school use (assuming 10,400 students/staff and a 41.5 acre site): Average Day Demand (ADD) Maximum Day Demand (MDD) Peak Hour Flow (without fire flow) = 60 gal/student or 4,000 gal/acre = 60 x 10,400 or 4,000 x 41.5 = 624,000 gal or 166,000 gal (use 624,000 gal) = 1.25 mgpd (ADD x 2.0 peaking factor) = 40 psi min, 80 psi max, 6 fps max. Due to the existing topography of the site, the proposed water service from Clinton Keith Road up to the Maintenance & Operations building must be piped up an elevation difference of as much as 70-feet which correlates to a pressure head loss of as much as approximately 30 psi. The domestic water flow demands for each building were estimated as shown on the next page. Assuming the athletic field will include a concession stand and restrooms, approximately 180 fixture units is assumed which translates to a flow demand of approximately 85 gpm. Using these values, the proposed domestic water system networks were modeled using a computerized simulation program. For all the building, the water pressure varies from 48 psi to 78 psi which falls within the acceptable range. Also, for all pipe segments, the velocity of flow is 6 fps or less. Domestic water mains 4-inches and larger shall be PVC C900 DR18 (CL150). Domestic water service laterals larger than 2-inches shall be PVC, and service laterals 2-inches and smaller shall be Type K soft copper. J-1

4 J-2 DOMESTIC WATER EXHIBIT - PHASE 1

5 J-3 DOMESTIC WATER EXHIBIT - FULL BUILDOUT

6 = Fire Water System For fire protection, the proposed Wildomar campus is under the jurisdiction of the Riverside County Fire Department with a water supply system operated and maintained by the Elsinore Valley Municipal Water District (EVMWD). On the west side of the site, it is proposed to tap a 10 water service pipe from an existing 16 water main at Clinton Keith Road. This service will branch into an 8 domestic water main and an 8 fire protection water main. On the east side of the site, it is proposed to tap an 8 water service pipe from an existing 8 water main at Clinton Keith Road. This service will branch into a 4 domestic water main and an 8 fire protection water main. 8 detector check valves will be located at the right-of-way, and the fire protection water network will be looped around the site. The fire protection water supply system shall be designed and constructed in accordance with EVMWD s Standard Specifications and Drawings dated July For fire calculations, the guidelines require the following minimum fire flow standards: Max. Day Demand (MDD) + Fire Flow = 80 psi max, 40 psi min, 10 fps max The Riverside County Fire Department requires the following at each fire hydrant: Fire Flow (minimum required) = 1, psi, 2 hour duration Fire flow data was provided by EVMWD in September 2016 at two locations as follows: Hydrant at (near Clinton Keith Road): Static Pressure: 109 psi Residual Pressure: 106 psi Hydrant Pitot Pressure: 95 psi Target Pressure: 20 psi 20 psi: 9,193 gpm Hydrant at Elizabeth Lane (at Kentman Court): Static Pressure: 106 psi Residual Pressure: 105 psi Hydrant Pitot Pressure: 96 psi Target Pressure: 20 psi 20 psi: 16,418 gpm Due to the existing topography of the site, the proposed water service from Clinton Keith Road up to the Maintenance & Operations building must be piped up an elevation difference of as much as 70-feet which correlates to a pressure head loss of as much as approximately 30 psi. The proposed fire protection pipe system networks were modeled using a computerized simulation program. At select hydrant locations throughout the site including the most remote hydrants, the water pressure maintained a range of 56 psi to 89 psi psi which far exceeds the minimum required 20 psi. Also, the velocity of flow in each pipe segment did not exceed 10 fps. Therefore, the existing water service to the site appears to possess ample pressure and flow to serve the development. On-site fire water pipe material shall be PVC C900 DR18 (CL150). Fire water services to each building will include a fire department connection (FDC), Post Indicator Valve (PIV) and check valve. FDC s shall be a minimum of 40-feet away from buildings and within 40-feet of a fire hydrant. Beyond the FDC, water pipe material will be PVC C900 DR14 (CL200). J-4

7 J-5 FIRE WATER EXHIBIT - PHASE 1

8 J-6 FIRE WATER EXHIBIT - FULL BUILDOUT

9 = Sanitary Sewer System The Wildomar campus will be serviced by a private gravity feed sanitary sewer system that will tie into a public sewer system operated and maintained by Elsinore Valley Municipal Water District (EVMWD). A preliminary analysis of the capacity of the on-site sanitary sewer system was performed as noted below considering full build-out conditions. This analysis is limited to the on-site sewer system. An understanding of the existing off-site sewer system and flows would be needed in order to analyze the impacts, if any, to the existing public sewer system. The capacities of the existing and proposed sewer pipes were analyzed in accordance with EVMWD s Standard Specifications and Drawings dated July 2004 using an Excel spreadsheet. At full buildout of the campus, it is estimated that there will be 10,000 students plus 400 faculty and staff, and 495,000 square feet of buildings. This equals to 10,400 / 495,000 = 21.0 students per 1,000 square feet. Estimated sewer flows were calculated considering 21.0 students/square foot and a Peak Flow = 1.84 x (average flow) 0.92 as required by EVMWD standards. In accordance with EVMWD guidelines, an air gap must be maintained along the top of the sewer flow to convey sewer gases downstream. Therefore, for sewer pipes less than 12 in diameter, the depth of wastewater flow shall not exceed onehalf the depth of the pipe. Referring to the attached spreadsheet, this produces the following sewerrelated data: Total Building Square Footage: 495,000 sf Total Number of Students and Staff: 10,400 FTE Total Wastewater Flows: 1.22 mgd Pipe material shall be SDR-35 PVC in accordance with EVMWD standards. J-7

10 Project: Mt. San Jacinto College, by: Wildomar, CA Manning: Calc'ed by: SANITARY SEWER CAPACITY CALCULATIONS FULL BUILDOUT (a) Educational 60 gal / student / day (b) (c) (d) (e) (f) (g) (h) (i) (j) (k) (m) (n) (o) (p) (q) (r) (s) (t) (u) (v) Facility Sewer Node (Upstream) Sewer Node (Downstream) Square Footage Area of Facility (1000 sf) Number of Full Time Equivalent Students, Faculty and Staff Occupant Load Factor Average Flow Cumilative Average Flow Peak Design Flow Pipe Diameter Pipe Length Pipe Slope Flow Capacity of Pipe (Flowing Full) Percentage of Depth of Flow in Pipe (50% for 12" and under, 75% for 15") Velocity at Low Flow for Ratio of Peak Flow vs Flow Capacity of Pipe Self-Cleaning (2 ft/s min.) Invert Elev (Upstrea,) Invert Elev (Downstream) Rim or Finished Floor Elev (Upstream) Invert Depth of Structure (Upstream) A E (ksf) O LF (sf) FTES Q E (mgd) SQ (mgd)q P (mgd) d (in) L (ft) S (ft/ft) Q F (mgd) Q P/Q F y/d v (ft/s) Inv (ft) Inv (ft) Rim (ft) H (ft) h (ft) Pipe Cover STEM Maint & Operations Classroom Science Classroom Classroom Multipurpose Bldg Library & Tech Center New Center Bldg Student Services Bldg % % % % % % % % % % % % , % % , % % , % E1 Point of Connection % Gym / Fitness 21 E % E2 Point of Connection % Total: sf 10,400 students mgd (a) Facility designation per Full Buildout Plan,. (o) The ratio of the peak design flow, Q P, and the flow capacity, Q F, used to determine (b) Upstream sewer node of the individual run. the depth of flow in the pipe per (q). (c) Downstream sewer node of the individual run. (p) Referring to the attached table "Open Channel Flow - Table of Circular (d) Square footage of each educational building attributed to each sewer node. Channel Ratios", the value Q D/Q F is used to determine the depth of flow (e) Occupant Load Factor of 21.0 Students/Staff per 1,000 square feet of building space. in the pipe for open channel conditions. In accordance with the Eastern Municipal (f) Estimated number of students or occupants per building. Water District's Sanitary Sewer Design guidelines, the depth of flow shall be limited (g) The Average Daily Flow for Schools based upon 60 gallons per day per student in accordance to 0.50 for 12" pipe or less, and 0.75 for 15" pipe. with Elsinor Valley Municipal Water District standards for domestic water use. (q) Check for minimum scouring velocity of 2 fps: v = (1.49/n)(r H) 2/3 S 1/2 where r H is (h) Cumulative average flows. is the hydraulic radius. (i) The peak flow, Q P = 1.84 Q 0.92 per Elsinor Valley Municipal Water District standards. (r) Invert elevation of the upstream node structure. (j) Inside pipe diameter for each run. (s) Invert elevation of the downstream node structure. (k) Length of each pipe run segment. (t) Manhole rim or inlet grate elevation at the upstream node (approximated from Grading (m) Slope of each pipe run segment. Plan) (n) The flow capacity of the pipe: Q = (0.464/n) (d/12) 8/3 S 1/2 (dividing by a factor of (u) Depth of the manhole or inlet structure. converts cfs to mgd) (v) Burial depth (measured from surface grade to top of pipe). J-8

11 J-9 SANITARY SEWER EXHIBIT - PHASE 1

12 J-10 SANITARY SEWER EXHIBIT - FULL BUILDOUT

13 = Electrical System Two primary metering service points will be constructed, separated by the riparian corridor which runs down the center of the site, north to south. Therefore the east side of the site will have a service and main switchboard serving the gym, football field and parking areas. The west side of the site, west of the riparian area, contains most of the proposed buildings and will have a service point and primary metering switchboard. The services will be connected to the SCE (Southern California Edison) overhead pole line to the south, running east-west along Clinton Keith Rd. Since the east side of the site contains only one building, football field and parking lot, a conventional service to the gym building with standard commercial metering will be provided with a 480V sub-feed to the football field. The west side main switchboard MSB will be sized at 1200Amp to service the new campus, at 12KV service voltage to match the SCE service. The new main switchboard MSB will be located at the south end of the site, adjacent or near to the union or classroom buildings. Campus power distribution will parallel the riparian corridor up against the east side of the buildings. This location was chosen to avoid placing electrical gear at the front of the buildings (west side). Each campus building will be provided with a pad mounted transformer dedicated to the building it serves. Parking lot lighting will be provided from 480V circuits derived from lighting panels in the buildings. Based upon the master plan, proposed square footage of the new buildings will be used to estimate the electrical load of the new campus. MSB will be sized as follows: West Campus 495K SF East Campus 42K SF Total Proposed Campus Power 6.8MW power; 327A at 12KV 630KVA power; 760A at 480V 7.4MW power The telephone and cable TV services will be connected at the overhead pole line to the south, running east-west along Clinton Keith Rd. The low voltage systems will be routed in parallel with the power duct bank running to the north from Clinton Keith Rd. campus main distribution frame MDF could likely be placed in the student union building. All data network fiber runs from each building will be brought to the MDF. J-11

14 J-12 ELECTRICAL EXHIBIT - PHASE 1

15 J-13 ELECTRICAL EXHIBIT - FULL BUILDOUT

16 J-14 TELECOMMUNICATIONS EXHIBIT - PHASE 1

17 J-15 TELECOMMUNICATIONS EXHIBIT - FULL BUILDOUT

18 = Gas System A new gas service will be provided to the campus by Southern California Gas Company (SCG). It is presumed that SCG will install the new gas lateral from Clinton Keith Road to the new gas meter which SCG will also install. Downstream of the meter (before running below grade) a shutoff cock and seismic shutoff valve (SSV) will be installed. The service pressure will be 5 pounds per square inch (PSI). This medium pressure gas (MPG) service will be distributed throughout the campus via polyethylene gas pipe installed below grade and routed to each building. The main gas piping will likely be 3 MPG. Individual building shutoff cocks shall be provided below grade in concrete yard boxes before the gas enters each building. It is recommended to install an additional SSV at each building for added protection but not required. 5 PSI medium pressure gas piping shall be routed into each building and distributed in the ceiling space of the highest floor of each building via black steel gas piping. Point-of-use gas pressure regulators shall be provided at rooftop mechanical units reducing the pressure down to standard 8 water column (W.C.) and connected to the units with shutoff cocks, dirt legs and flexible connections. For gas requirements inside the buildings such as water heaters, kitchen equipment, etc., medium pressure gas piping shall be routed to the roof over the areas in the buildings that require gas. The gas will then go through a rooftop gas pressure regulator reducing the pressure to standard 8 W.C. Standard pressure gas piping shall then be routed down through the roof and distributed to the pieces of equipment that require gas connections. The future Gym Building on the east side of the campus will have a dedicated service and meter from Clinton Keith Road to avoid crossing the riparian corridor. J-16

19 J-17 GAS SYSTEM EXHIBIT - PHASE 1

20 J-18 GAS SYSTEM EXHIBIT - FULL BUILDOUT