SU0011062 - Laserfiche WebLink

Home Browse Search

INTRODUCTION 1 PROJECT OVERVIEW This analysis has been prepared to accompany an application for the proposed expansion of the existing Delta Woods Dairy facility in San Joaquin County, CA. A Waste Management Plan (WMP)describing the generation and management of dairy wastewater under the proposed expanded conditions must be prepared in accordance with San Joaquin County and Central Valley Regional Water Quality Control Board (CVRWQCB) requirements. CVRWQCB General Order No. R5-20013-0122, Reissued Waste Discharge Requirements General Order for Existing Milk Cow Dairies, (Order)was adopted by the California Regional Water Quality Control Board (CRWQCB)Central Valley Region in 2013 and establishes the criteria for preparation of the WMP. Per the requirements set forth by the aforementioned Order each existing milk cow dairy in the Central Valley Region that is located in an area subject to inundation from the prescribed flood event must have or must construct improvements that provide protection from that flood event. More particularly the aforementioned Order states the following: General Specification 8.2: "in the Sacramento and San Joaquin River Basins, ponds and manured areas at existing milk cow dairies in operation on or before 27 November 1984 shall be protected from inundation or washout by overflow from any stream channel during 20-year peak stream flows. Existing milk cow dairies that were in operation on or before 27 November 1984 and that are protected against 100-year peak stream flows must continue to provide such protection. Existing milk cow dairies built or expanded after 27 November 1984 shall be protected against 100-year peak stream flows(Title 27 Section 22562(c))." Given the proposed expansion of this existing dairy facility it will be required to provide protection against 100-year peak stream flows. The above referenced section of Title 27 (Section 22562 of Chapter 7, Subchapter 2) also states the following criterion in its item(3): "The determination of peak stream flows shall be from data provided by a recognized federal, state, local, or other agency." The source of flood information for this analysis is Federal Emergency Management Agency(FEMA) Flood Insurance Rate Maps(FIRMs) and Flood Insurance Studies (FISs), FIRMs and FISs are industry standard sources of flood information for engineers, scientists, lending institutions, and other industries with a vested interest in the location of real property as it relates to areas subject to flood inundation. All of the existing Delta Woods Dairy site and its proposed expansion area lie within a FEMA Zone AE, or an area determined to be subject to inundation by the 100-year flood event with a determined Base Flood Elevation (BFE). It is the intent of this analysis to accomplish the following: 1. Verify the Base Flood Elevation (BFE)for the existing dairy site and its proposed expansion area. 2. Determine the elevations of existing Dairy Production Area(DPA) improvements relative to the BFE. a. If the DPA is currently protected from inundation by the design storm event, then the extent of this protection will be demonstrated. b. If the DPA is not protected from inundation by the design storm event, then the extent of Flood Protection Analysis Proposed Delta Woods Dairy Expansion San Joaquin County.CA