Fire Commission City and County of San Francisco London N. Breed, Mayor Stephen A. Nakajo, President*

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The SFPUC, the SFFD and the SF Department of President, San Fi(for F8-F9) the Environment should study adding salt-water Fire Commission water sources, especially on the west side. Findings and recommendations from this study should be presented to the Board of Supervisor. pump stations to improve the redundancy of 2018-2019 CIVIL GRAND JURY FINDINGS, RECOMMENDATIONS, AND RESPONSES TO FINDINGS AND RECOMMENDATIONS by no later than June 30, 2021. While it is true that the SFPUC and SFFD are studying four potential water sources proposed to supply a potable EFWS on the west side of the City, which are not located north of Golden Gate Park, which by no means would re The ENVS was built after the 1906 earthquake, and its location, primarity in the theorets profit on 5a fan Fancksoc, oursepands to the cleation of the majority of the city's population at that time, Since 2010, the SPHC, S SFFD are developing plans that would implement a resilient, robust, and redundant potable EFWS for the Westside of San Francisco. The potable EFWS inclusion of a second 30,000 gallons per minute pump station in the vicinity of inclusion of a second 30,000 gallons per minute pump station than the So millon gallon north basin of the Sunet Reservoir, which recently unde Western neighborhoods in San Francisco that is capable of providing water to the SFFD firefighters at the high-pressure needed for firefighters to combat. EFWS pipelines and potentially two new pump stations likely to be supplied by study CS-199. This study divided the City into areas based on those defined by the SFFD for initial alarm response and were called Fire Response Areas (FRAs) demands generated by Charles Scawthorn, PhD using a Monte Carlo analysis o fire ignitions and fire growth using the ground motions from the design earthquake (7.8 magnitude). The fire ignitions were generated using methods similar to those used for the Community Action Plan for Seismic Safety (CA aggregated into the likely water supplies for each FRA. It should be noted that the FRA water demand. The reliability scores do exactly that - estimate how much EFWS water will be available for firefighting demands in a given FRA. The water sources, and in a manner that allows the piping network to be extended sources could be supplied to the EFWS pipeline via a 30,000 gallon per minute pump station in the vicinity of Lake Merced. The two sources being studied for this pump station are Lake Merced, which has a water supply of approximately one billion gallons, and a 60° seismically resilient SFPUC Hetch Hetchy Regiona reliability scores are not meant to represent an estimate of the fire protection for a given house, block, or blocks. Rather it is a measure of the EFWS capacity and demand. The SFPUC recognites the need to analyze potenti four water sources. The SFPUC and SFFD’s potable EFWS is being designed in a manner that allows for agility and the flexibility to add new technologies and the proposed system’s resiliency, reliability, performance, or ability to provide abundant high-pressure water for fire suppression to the Richmond District demands on a more detailed level, and the agency began the process of doing Westside of San Francisco that is being developed and analyzed would provid demands that were aggregated into the likely fire demands for each FRA. The water supplies for each FRA were developed using the reliability modeling too GIRAFFE, developed at Cornell University by Professor Thomas D. O' GIRAFFE performs internal Monte Carlo analysis to damage pipes in the syster unlikely even after a seismic event. The reliability score for each FRA is calculated using the sum of all water supplies for each FRA and dividing it by study (ATC 2010). The fire ignitions subsequently were used to develop water bringing a robust and resilient high-pressure firefighting water system to the Expanding the EFWS prior to ensuring that the existing EFWS is resilient and reliable would have contradicted best engineering practices. The SFPUC and reservoirs, with a total water capacity of approximately 413,000,000 gallons. Additionally, Lake Merced, also located within City Limits, has an additional approximately 1,000,000,000 gallons. The potable EFWS system for t large fires after a seismic event, and is likely to include over 14 miles of new Fire Response Areas (FRAs) were utilized by SFPUC and SFFD in the planning Probable fire demands were developed for each FRA using 1000 sets of fire that is being developed and analyzed would propose the best method for that the new EFWS pipeline in the Sunset and Richmond Districts could be supplied from four sources of water at two locations. The first two water Water System pipeline. The proposed potable EFWS also is analyzing the inicipal water system (MWSS), which is quite conservative and highly after a seismic event. San Francisco is unique in that there are 11 in-city the likely water supplies for each FRA assumed no water from the City's for multiple scenarios. The water supplies developed by GIRAFFE were AWSS SFPUC Hetch Hetchy Regional Water system pipeline. in the future to serve additional areas. Disagree, partially Disagree, partially Disagree, partially President, San FranciscoFire Commission[September 15, 2019] President, San FranciscoFire Commission Current plans to extend protections to the President, San Francisco western part of the City do not include any high-fire Commission pressure water sources north of Golden Gate [September 15, 2019] [September 15, 2019] The City does not have a timeline to fund and Procomplete development of shigh-pressure, multi-fit sourced, seismicully safe emegacy water (Stepper supply for all parts of the City, including poor neighborhoods that histor The "reliability scores" being used by the SFPUC impart an overly optimistic impression of the protection provided. well protected as the downtown business districand many richer neighborhoods. Park.