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§21750. SWRCB - Waste Management Unit(Unit) Characteristics and Attributes to be
<br /> Described in the ROWD. [C15: 42595 & 42547(a)H T14: §17777, 418260, 418263, & §18264]
<br /> (a) Identify Potential Impairment—Dischargers shall provide in the report of waste discharge("ROWD",
<br /> including any such report integrated into a Joint Technical Document(JTD),pursuant to 421585)an analysis
<br /> describing how the ground and surface water could affect the Unit and how the Unit, including how any waste,if it
<br /> escapes from the Unit,could affect the beneficial uses of ground water bodies(including,but not limited to,any
<br /> aquifers underlying the facility)and surface water bodies.The RWQCB shall use this information to determine the
<br /> suitability of the Unit with respect to ground water protection and avoidance of geologic hazards and to demonstrate
<br /> that the Unit meets the classification criteria set forth in Article 3, Subchapter 2,Chapter 3, Subdivision I of this
<br /> division(420240 et seq.).
<br /> (b) Support Proposed Classification—Dischargers shall provide the data required by this section regarding the
<br /> physical characteristics of the Unit and the surrounding region in order to demonstrate suitability for the appropriate
<br /> Unit classification.The ROWD shall present this information in understandable written,tabular, and graphic format,
<br /> as appropriate,and this information shall be at a level of detail appropriate to support the RWQCB's approving the
<br /> Unit's proposed classification. Maps,plans,diagrams,and other graphics shall be prepared to appropriate scale and
<br /> each shall include a legend identifying the information presented.All sources of data shall be identified.
<br /> (c) Restate,Where Appropriate—If a report submitted by a discharger refers to another source,the relevant
<br /> information from that source shall be restated in the report.If the source is not generally available,the relevant
<br /> portion(s)of the source shall be included verbatim in the report as an appendix.
<br /> (d) Topography.
<br /> (1) Topographic Map—A map of the Unit and its surrounding region within one mile of the perimeter of the
<br /> Unit,showing elevation contours,natural ground slopes,drainage patterns,and other topographic features.
<br /> (2) Floodplain—Identification of whether the facility is located within a 100-year floodplain.This
<br /> identification must indicate the source of data for such determination and include a copy of the relevant Federal
<br /> Emergency Management Agency(FEMA)flood map, if used,or the calculations and maps used where a FEMA
<br /> map is not available.The submittal shall also identify the 100-year floodplain and any other special flooding factors
<br /> (e.g.wave action)which must be considered in designing,constructing,operating,or maintaining the facility to
<br /> withstand washout from a 100-year flood. Dischargers having facilities located in the 100-year floodplain shall
<br /> provide the following information:
<br /> (A) engineering analysis to indicate the various hydrodynamic and hydrostatic forces expected to result at the
<br /> site as consequence of a 100 year flood;
<br /> (B) structural or other engineering studies showing the design of Units and flood protection devices(e.g.,
<br /> floodwalls,dikes)at the facility and how these will prevent washout;and
<br /> (C) landfills accepting municipal solid waste shall demonstrate that:
<br /> 1. for Class 11 landfills,the Unit meets the flooding requirements of f20250(c);or
<br /> 2. for Class III landfills,the Unit meets the requirements of 420260(c).
<br /> (e) Climatology—Dischargers shall calculate required climatologic values for Units from measurements made at
<br /> a nearby climatologically similar station. In addition to the required calculations for each Unit,dischargers shall
<br /> provide the source data from which such values were calculated, together with the name, location,and period of
<br /> record of the measuring station.
<br /> (1) Isohyetal Map—A map showing isohyetal contours for the proposed Unit and its surrounding region
<br /> within ten miles of the facility perimeter,based on data provided by the National Weather Service or other
<br /> recognized federal,state,local,or private agencies.
<br /> (2) Precipitation—Estimated maximum and minimum annual precipitation at the proposed Unit.
<br /> (3) Design Storm—Maximum expected 24 hour precipitation for the Unit's design storm(i.e.,for storm
<br /> conditions specified as design criteria for the particular class of Unit as prescribed in Table 4.1 of Article 4,
<br /> Subchapter 2,Chapter 3, Subdivision 1 of this division].
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