(i) The direction of north, scale, property lines, and existing structures and roads;

(ii) Cut and fill slopes indicating the top and bottom of slope catch lines;

(iii) Approximate slopes, contours, and direction of stormwater flow before and after major grading activities;

(iv) Areas of soil disturbance and areas that will not be disturbed;

(v) Locations of structural and operational controls (BMPs) identified in the ESC Plan;

(vi) Locations of off-site material, stockpiles, waste storage, borrow areas, and vehicle/equipment storage areas;

(vii) Locations of all adjacent surface water bodies, including wetlands;

(viii) Locations where stormwater or non-stormwater discharges off-site and/or to a surface water body, including wetlands;

(ix) Location and dimensions of stormwater facilities.

(i) Core Element #1: Preparation of a Stormwater Site Plan (SSP) – Used to integrate stormwater management into project planning and design, demonstrate compliance with other applicable Core Elements, and illustrate and validate the design of any permanent stormwater management drainage facilities. Information on how to develop a SSP can be found in Chapter 3 of the Stormwater Management Manual for Eastern Washington (2004), as amended.

(ii) Core Element #2: Construction Stormwater Pollution Prevention Plan (SWPPP) – The purpose of this Core Element is to control erosion and prevent sediment and other pollutants from leaving the site. Information on how to develop a SWPPP can be found in Chapter 7 of the Stormwater Management Manual for Eastern Washington (2004), as amended.

(iii) Core Element #3: Source Control of Pollution – The purpose of this Core Element is to prevent stormwater from coming into contact with potential pollutants. Large projects shall apply all known, available and reasonable source control BMPs. All source control BMPs shall be selected, designed and maintained according to Chapter 8 of the Stormwater Management Manual for Eastern Washington (2004), as amended.

(iv) Core Element #4: Preservation of Natural Drainage Systems – The purpose of this Core Element is to maximize the extent to which stormwater discharge patterns, rates, and outfall locations remain the same after a development project. The manner by which runoff is discharged from the project site must not cause a significant adverse impact to downstream receiving waters and down-gradient properties and should be addressed as part of the off-site analysis described in Appendix 3A of Chapter 3 of the Stormwater Management Manual for Eastern Washington (2004), as amended.

(v) Core Element #5: Runoff Treatment – The purpose of this Core Element is to protect water quality in the receiving water by reducing pollutants in stormwater using biological, physical and chemical removal methods. Applicable only to sites that are determined to have sufficient pollutant generating potential as defined in Appendix 1 of the NPDES Phase II Permit. Basic runoff treatment is required on all new development that creates 5,000 ft² of pollutant generating impervious surface (PGIS). The thresholds for redevelopment and advanced treatment requirements (metals, oil, phosphorous, etc.) are located in Appendix 1 of the NPDES Phase II Permit. Treatment facilities shall be selected, designed, sized, constructed, operated and maintained in accordance with Appendix 1 of the NPDES Phase II Permit and the guidance in Chapters 4 and 5 of the Stormwater Management Manual for Eastern Washington (2004), as amended.

(vi) Core Element #6: Flow Control – The purpose of this Core Element is to protect stream morphology and habitat by mitigating the impacts of increased storm runoff volumes and flow rates to streams. Projects that result in 10,000 square feet or more of impervious surface shall construct stormwater flow control facilities for any discharge of stormwater. The most currently adopted City of Pullman Design Standards shall be used when determining the design storms and the minimum requirements, thresholds and standards for designing permanent stormwater collection, conveyance, flow control and treatment facilities and BMPs. Design of flow control facilities shall also be consistent with Chapter 6 of the Stormwater Management Manual for Eastern Washington (2004), as amended.

(vii) Core Element #7: Operation and Maintenance – The purpose of this Core Element is to prevent failure of stormwater treatment facilities or improper discharges due to inadequate maintenance or improper operation. Where structural BMPs are required, property owners shall operate and maintain the facilities in accordance with an Operation and Maintenance (O&M) plan prepared in accordance with the provisions of Chapters 5 and 6 of the Stormwater Management Manual for Eastern Washington (2004), as amended.

(i) Per 10.32.090(3)(a)(ii), Large Projects shall prepare a Stormwater Pollution Prevention Plan (SWPPP) for land disturbing activity as part of the Core Elements of stormwater management for development.

(ii) Large projects that have obtained coverage and are in full compliance with the requirements and conditions of the NPDES Construction Stormwater General Permit are considered to have fully satisfied Core Element #2 in Section 10.32.090(3)(a)(ii) and be in full compliance with the provisions of this Section.

(iii) The SWPPP shall be implemented beginning with initial soil disturbance and continue until final stabilization.

(iv) Each SWPPP shall bear the name(s) and address(es) of the owner or developer of the site, and of any consulting firm retained by the applicant together with the name of the applicant’s principal contact at such firm.

(v) Each SWPPP shall include a statement that any land disturbing activity shall be in accordance with the SWPPP and that a Certified Erosion and Sediment Control Lead (CESCL) shall be on site or on call on all days when construction or grading activity takes place.

(vi) The applicant shall include each of the twelve items below in the narrative of the SWPPP and ensure they are implemented unless site conditions render the item unnecessary and the exemption from that item is clearly justified in the SWPPP.

(vii) The applicability, requirements, and design details for each of the twelve SWPPP items above are outlined in Appendix 1 of the NPDES Phase II Permit and the Stormwater Management Manual for Eastern Washington (2004), as amended.

(viii) The applicant shall maintain and repair, as needed, all sediment and erosion control BMPs to assure continued performance of their intended function.

(ix) The applicant shall perform inspections of BMPs periodically and document the results of the inspections. The SWPPP and inspection records shall be maintained at the site during the progress of work and made available for review by the City inspector upon request. The Construction SWPPP shall be modified whenever there is a significant change in the design, construction, operation, or maintenance of any BMP.

(i) The SWPPP shall include a vicinity map or general location map with sufficient detail to identify the location of the construction site and receiving waters.

(ii) The SWPPP shall include a legible site map (or maps) showing the entire construction site. The following features shall be identified, unless not applicable due to site conditions: