§ 56.27 STORMWATER POLLUTION PREVENTION PLAN REQUIREMENTS.
   (A)   Construction plan sheets and an accompanying narrative report shall be submitted describing existing and proposed site conditions.
   (B)   Included are the following:
      (1)   An index indicating the location in the construction plans of all information required by this division;
      (2)   Description of the nature and purpose of the project;
      (3)   Legal description of the project site. The description should be to the nearest quarter section, township and range, and include the civil township;
      (4)   Soil properties, characteristics, limitations, and hazards associated with the project site and the measures that will be integrated into the project to overcome or minimize adverse soil conditions;
      (5)   General construction sequence of how the project site will be built, including phases of construction;
      (6)   Fourteen-digit watershed hydrologic unit code (HUC);
      (7)   A reduced plat or project site map showing the lot numbers, lot boundaries and road layout and names. The reduced map must be legible and submitted on a sheet or sheets no larger than 11 inches by 17 inches for all phases or sections of the project site;
      (8)   A general site plan exhibit with the proposed construction area superimposed on ortho-aerial map at a scale of one inch equals 100 feet. The exhibit should provide two-foot contour information and include all roads and buildings within a minimum 500-foot radius beyond the project boundaries;
      (9)   Identification of any other state or federal water quality permits that are required for construction activities associated with the owner's project site;
      (10)   Temporary stabilization plans and sequence of implementation;
      (11)   Permanent stabilization plans and sequence of implementation;
      (12)   Temporary and permanent stabilization plans shall include the following:
         (a)   Specifications and application rates for soil amendments and seed mixtures; and
         (b)   The type and application rate for anchored mulch.
      (13)   Anticipated inspection and maintenance requirements for permanent and temporary measures. This shall include the expected frequency of routine inspections and maintenance activities (such as removal of waste concrete);
      (14)   A description of potential pollutant sources associated with the construction activities that may reasonably be expected to add a significant amount of pollutants to stormwater discharges, including:
         (a)   Waste concrete management;
         (b)   Material delivery, handling and storage;
         (c)   Sanitary/septic waste management;
         (d)   Solid waste/trash and debris management;
         (e)   Spill prevention control and countermeasures;
         (f)   Vehicle and equipment cleaning, fueling and maintenance; and
         (g)   Sensitive and vegetated area preservation.
      (15)   Material delivery, handling and storage associated with construction activities shall meet the spill prevention and spill response requirements of 327 I.A.C. 2-6.1;
      (16)   The SWPPP shall include provisions for addressing the following issues as applicable to the site-specific construction activities:
         (a)   Dewatering operations;
         (b)   Contaminated soil management;
         (c)   Hazardous materials and waste management;
         (d)   Pesticides, herbicides and fertilizer use;
         (e)   Collection system maintenance;
         (f)   Drainage system flushing; and
         (g)   Over-water activities.
      (17)   The city reserves the right to develop or adopt other guidance documents to serve as design and implementation standards;
      (18)   Vicinity map depicting the project site location in relationship to recognizable local landmarks, cities and major roads, such as a USGS topographic quadrangle map or county or municipal road map;
      (19)   An existing project site layout that must include the following information:
         (a)   Location, name and normal water level of all wetlands, lakes, ponds and water courses on, or adjacent to, the project site;
         (b)   Location of all existing structures on the project site;
         (c)   One-hundred year floodplains, floodway fringes and floodways. Please note if none exists;
         (d)   Soil map of the predominant soil types, as determined by the United States Department of Agriculture (USDA), Natural Resources Conservation Service (NRCS) Soil Survey or as determined by a soil scientist. A soil legend must be included with the soil map;
         (e)   Identification and delineation of vegetative cover, such as grass, weeds, brush and trees, on the project site;
         (f)   Location of storm, sanitary, combined sewer and septic tank systems and outfalls;
         (g)   Location of regulated drains, farm drains, inlets and outfalls, if any exist of record;
         (h)   Land use of all adjacent properties; and
         (i)   Existing topography at a contour interval appropriate to indicate drainage patterns.
      (20)   Final project site layout, including the following information:
         (a)   Location of all proposed site improvements, including roads, utilities, lot delineation and identification, proposed structures and common areas;
         (b)   One-hundred year floodplains, floodway fringes and floodways. Please note if none exists; and
         (c)   Proposed final topography at a contour interval appropriate to indicate drainage patterns.
      (21)   Plans shall include the following information:
         (a)   Provisions for operation and maintenance of measures identified in the PCP;
         (b)   Make clear the erosion prevention and sediment controls which are most appropriate to the specific site conditions;
         (c)   Illustrate the location and extent of erosion prevention and sediment controls;
         (d)   Sequencing and schedule information, structural and nonstructural Best Management Practices (BMPs), temporary and permanent stabilization measures;
         (e)   Anticipated inspection and maintenance requirements for permanent and temporary measures. This shall include the expected frequency of routine inspections and maintenance activities (such as removal of sediment and construction debris);
         (f)   Provisions for construction phasing. This shall be designed so that stripping and clearing of the site exposes only the area necessary for immediate activities and minimizes the amount of soil exposed at any one time. This includes rough grading, construction of utilities, infrastructure and buildings and final grading and landscaping. Phasing shall identify an expected date when clearing of the area will begin and the estimated duration of exposure. The sequence of phased clearing and the installation of temporary and permanent erosion control measures shall be identified;
         (g)   Provisions for stabilizing denuded areas and soil stockpiles within 15 days of final grade;
         (h)   Provisions for stabilizing cut and fill slopes.
            1.   Minimization of erosion shall be the objective when designing and constructing cut and fill slopes. Length, steepness, soil type, upslope tributary area, groundwater and other relevant factors shall all be taken into account.
            2.   Stabilization practices such as rock rip-rap, geosynthetic material or other methods approved by the city shall be used on cut and fill slopes at three to one (3:1) (horizontal to vertical) or greater.
            3.   Cut and fill slopes, except those indicated in division (B)(21)(h)4. below, shall be stabilized with permanent or temporary soil stabilization measures within 15 days of either achieving final grade, or within 15 days to any area that will remain dormant for over 60 days.
            4.   Any cut and fill slopes with a grade of 18% or greater shall be either temporarily or permanently stabilized within 48 hours.
         (i)   Erosion prevention measures shall be designed to minimize the suspension of sediment from the soil. The controls may function independently or in combination with sediment control measures, to prevent sediment laden runoff from leaving the construction site. Acceptable erosion prevention practices shall be defined by the city guidance documents; and
         (j)   Sediment control measures shall be designed to remove sediment, by settling, flocculating, filtering or other means, from storm runoff prior to discharge from the construction site. The controls may function independently or in combination with erosion prevention measures to prevent sediment laden runoff from leaving the construction site. Acceptable sediment control practices shall be defined by city guidance documents.
(Ord. Z-06-09, passed 4-3-2006)