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P22-1089, PUD-147, Tract 8522 PC-2024-14, June 26, 2024 24 51. FOOTHILL ROAD STORM PIPES: The storm drain network relies on connections to or extensions of existing storm drainpipes, one at the west end of Lot 89 where an existing 24” CMP passes beneath Foothill Road, and one at the south end of Parcel F where connection to an existing 36” pipe is proposed. The condition of these existing pipes shall be verified by the applicant through video inspection. If either pipe is deteriorated beyond its service lift, then the replacement of the pipe, or rehabilitation in a manner acceptable to the City Engineer, shall be included with the project. (Address this condition prior to approval of the subdivision improvement plans) Project Specific Condition 52. DETENTION BASIN: Because the depth of water within the Parcel F detention basin will rise above 18”, it is considered a drowning risk for children. The California Building Code requires said basins to be enclosed with a fence that includes self-closing, self- latching gates with hardware elevated at least 54 inches from the ground to discourage easy access by children. The fence must be at least 60”-high and have a maximum vertical clearance of 2” from the ground to the bottom of the fence. There must be no gaps, voids or other features that may allow a child under 5 years old to climb over. If a chain-link fence is proposed, it must be non-climbable. (Address this condition prior to approval of the subdivision improvement plans) Project Specific Condition 53. EMERGENCY OVERLAND FLOW: If the proposed network of ditches and pipes becomes plugged or overwhelmed by a greater than 15-year storm event, the site must accommodate emergency overland flows without inundating any of the residential structures. The greatest flooding threat will come from flows that originate west of Foothill Road and then drain across the subdivision. The proposed development must be designed to accommodate emergency flows (assumed to be the 50-year storm according to the City’s design standards). (Address this condition prior to approval of the subdivision improvement plans) Project Specific Condition 54. FEMA FLOOD ZONE: According to Sheet C-2, Lot 27 will include a new home within the boundary of FEMA Flood Zone AH, although the pad will be filled to lift the home out of the flood plain. The applicant is required to file a LOMR-F (letter of map revision based on fill) with FEMA. Permits for this home cannot be issued until the LOMR-F has been approved by FEMA, with a copy of said approval provided to the City. (Address this condition prior to approval of the subdivision improvement plans) Project Specific Condition 55. SANITARY SEWER NETWORK MODELING: A site-specific analysis of the proposed sanitary sewer network was commissioned with the City’s consultant, Woodard & Curran. Woodard & Curran’s analysis offered the following recommendation: A manhole at the Lemonwood Way intersection is suspected of splitting flows. Some of the flows continue north on Muirwood while some are directed east on Lemonwood and then south into the 8” pipe that extends across the east end of the Merritt property. Woodard & Curran recommends the split at Lemonwood Way be plugged such that all Muirwood flows continue north. (Address this condition prior to approval of the subdivision improvement plans) Project Specific Condition