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K Michael Kith, REHS Program Coordinator Environmental Health Department N �� San Joaquin County February 11, 2020 Page 2 of 2 nuisance. A disposal field at this site cannot meet the requirements of the OWTS Standards, likely cannot meet RWQCB Tier 1 requirements for OWTS Policy, and would not be protective of ground and/or surface waters. The engineer -designed wastewater holding tank system has been proposed instead of an alternative treatment system because it does not include a discharge of treated wastewater and will be protective of ground and/or surface water quality. The SJC EHD also has indicated concern that the site may be located in the floodway, and has advised that septic systems in floodways are prohibited according to San Joaquin County Department of Public Works, Flood and Water Resources Division. As shown on FEMA Flood Insurance Rate Maps, Panel 0280F of San Joaquin County, California and Incorporated Areas, the site for the proposed wastewater holding tank is not located in a floodway, although the site is within a FEMA Zone AE Special Flood Hazard Area (SFHA) with a floodplain elevation of 9 ft (NAVD 88). A copy of Panel 0280F is attached. The holding tank system has been designed to resist flotation and spill under flooding conditions that may occur. Likewise, the proposed design is for a holding tank system, not a septic system. We appreciate the SJC EHD's consideration of this information and we will be assisting the Association in making application to the SJC EHD for construction of the new holding tank system. If you have any questions, please contact me at ebeckenstein(a-),ksninc.com or (916) 403- 5900. Sincerely, KJELDSEN, SINNOCK & NEUDECK, INC. Elisabeth A. Beckensten, RCE 88222 Enclosure SJC EHD February 5, 2020 Email Correspondence SJC FEMA FIRM Panel 0280F Grindstone Joe's Permit Plan Set Submittal