Bridge_#1005_SWPPP_Plan.pdf

Stormwater Pollution Prevention Plan (SWPPP)

Bridge #1005 Munger Road Over Drain 10 01/31/2025

EPA SWPPP Template, Version 1.1, September 17, 2007 i

Appendix A: SWPPP Template – Authorized States

Instructions

To help you develop the narrative section of your construction site SWPPP, the U.S

Environmental Protection Agency (EPA) has created this electronic SWPPP template. The template is designed to help guide you through the SWPPP development process and help ensure that your SWPPP addresses all the necessary elements stated in your construction general permit.

You should use this template with EPA’s guidance on Developing Your Stormwater Pollution

Prevention Plan. Both are available on EPA’s website at www.epa.gov/npdes/swpppguide

This template covers the SWPPP elements that most state construction general permits require, however, you are strongly encouraged to customize this template. There are two major reasons to customize this template:

• To reflect the terms and conditions of your construction general permit; and

• To reflect the conditions at your site

Some states might have their own SWPPP template. If so, use the state-suggested format. In such cases, this document and its template might provide useful background information.

Using the SWPPP Template

Each section of this template includes “instructions” and space for project information. You should read the instructions for each section before you complete that section. This template was developed in Word so that you can easily add tables and additional text. Some sections may require only a brief description while others may require several pages of explanation.

Tips for completing the SWPPP template

• If there is more than one construction operator for your project, consider coordinating development of your SWPPP with the other operators.

• Multiple operators may share the same SWPPP, but make sure that responsibilities are clearly described.

• Modify this SWPPP template so that it addresses the requirements in your construction general permit and meets the needs of your project. Consider adding permit citations in the SWPPP when you address a specific permit requirement.

http://www.epa.gov/npdes/swpppguide ii

Stormwater Pollution Prevention Plan for:

Bridge #1005 Munger Road Over Drain 10

North Munger Road, Short Creek Street to Catamaran Way

Star, Idaho, 83669

Operator(s):

Ada County Highway District (ACHD)

3775 Adams Street

Garden City, Idaho, 83714

208-387-6100

SWPPP Contact(s):

Insert Company or Organization Name

Insert Name

Insert Address

Insert City, State, Zip Code

Insert Telephone Number

Insert Fax/Email

SWPPP Preparation Date:

01 /31/2025

Estimated Project Dates:

Project Start Date: October 2026

Project Completion Date: March 2027 iii

Contents

SECTION 1: SITE EVALUATION, ASSESSMENT, AND PLANNING

1.1 Project/Site Information

1.2 Contact Information/Responsible Parties

1.3 Nature and Sequence of Construction Activity

1.4 Soils, Slopes, Vegetation, and Current Drainage Patterns

1.5 Construction Site Estimates

1.6 Receiving Waters

1.7 Site Features and Sensitive Areas to be Protected

1.8 Potential Sources of Pollution

1.9 Endangered Species Certification

1.10 Historic Preservation

1.11 Applicable Federal, Tribal, State or Local Programs

1.12 Maps

SECTION 2: EROSION AND SEDIMENT CONTROL BMPS

2.1 Minimize Disturbed Area and Protect Natural Features and Soil

2.2 Phase Construction Activity

2.3 Control Stormwater Flowing onto and through the Project

2.4 Stabilize Soils

2.5 Protect Slopes

2.6 Protect Storm Drain Inlets

2.7 Establish Perimeter Controls and Sediment Barriers

2.8 Retain Sediment On-Site

2.9 Establish Stabilized Construction Exits

2.10 Additional BMPs

SECTION 3: GOOD HOUSEKEEPING BMPS

3.1 Material Handling and Waste Management

3.2 Establish Proper Building Material Staging Areas

3.3 Designate Washout Areas

3.4 Establish Proper Equipment/Vehicle Fueling and Maintenance Practices

3.5 Control Equipment/Vehicle Washing

3.6 Spill Prevention and Control Plan

3.7 Any Additional BMPs

3.8 Allowable Non-Stormwater Discharge Management

SECTION 4: SELECTING POST-CONSTRUCTION BMPs

SECTION 5: INSPECTIONS

5.1 Inspections

5.2 Delegation of Authority

5.3 Corrective Action Log

SECTION 6: RECORDKEEPING AND TRAINING

6.1 Recordkeeping

6.2 Log of Changes to the SWPPP

6.3 Training

SECTION 7: FINAL STABILIZATION

iv

SECTION 8: CERTIFICATION AND NOTIFICATION

SWPPP APPENDICES

Appendix A – General Location Map Appendix B – Site Maps Appendix C – Construction General Permit Appendix D – NOI and Acknowledgement Letter from EPA/State Appendix E – Inspection Reports Appendix F – Corrective Action Log (or in Part 5.3) Appendix G – SWPPP Amendment Log (or in Part 6.2) Appendix H – Subcontractor Certifications/Agreements Appendix I – Grading and Stabilization Activities Log (or in Part 6.1) Appendix J – Training Log Appendix K – Delegation of Authority Appendix L – Additional Information (i.e., Endangered Species and Historic Preservation Documentation)

SECTION 1: SITE EVALUATION, ASSESSMENT, AND PLANNING

1.1 Project/Site Information

Project/Site Name: Bridge #1005 Munger Road Over Drain 10

Project Street/Location: North Munger Road, Short Creek Street to Catamaran Way

City: Star State: Idaho ZIP Code: 83669

County or Similar Subdivision: Ada County

Latitude/Longitude (Use one of three possible formats, and specify method)

Latitude: Longitude:

1. 43 º 42 ' 32.8'' N (degrees, minutes, seconds) 1. 116 º 30 ' 11.6'' W (degrees, minutes, seconds)

Method for determining latitude/longitude:

USGS topographic map (specify scale: ) EPA Web site GPS

Other (please specify): Google Earth

Is the project located in Indian country? Yes No

If yes, name of Reservation, or if not part of a Reservation, indicate "not applicable."

Is this project considered a federal facility? Yes No

NPDES project or permit tracking number*:

*(This is the unique identifying number assigned to your project by your permitting authority after you have applied for coverage under the appropriate National Pollutant Discharge Elimination System (NPDES) construction general permit.)

Instructions:

― In this section, you can gather some basic site information that will be helpful to you later when you file for permit coverage.

― For more information, see Developing Your Stormwater Pollution Prevention Plan: A SWPPP Guide for Construction Sites (also known as the SWPPP Guide), Chapter 2

― Detailed information on determining your site’s latitude and longitude can be found at www.epa.gov/npdes/stormwater/latlong http://www.epa.gov/npdes/stormwater/latlong

1.2 Contact Information/Responsible Parties

Operator(s):

Ada County Highway District

3775 Adams Street

Garden City, Idaho, 83714

Project Manager(s) or Site Supervisor(s):

Ada County Highway District

Chris Dayley

3775 Adams Street

Garden City, Idaho, 83714 projects@achdidaho.org

SWPPP Contact(s):

Insert Company or Organization Name:

Insert Name:

Insert Address:

Insert City, State, Zip Code:

Insert Telephone Number:

Insert Fax/Email:

Insert area of control (if more than one operator at site):

Repeat as necessary

This SWPPP was Prepared by:

David Evans and Associates

Spencer Savage, PE

9175 West Black Eagle Drive

Boise, Idaho 83709

208-900-9049 spencer.savage@deainc.com

― List the operator(s), project managers, stormwater contact(s), and person or organization that prepared the SWPPP. Indicate respective responsibilities, where appropriate.

― Also, list subcontractors expected to work on-site. Notify subcontractors of stormwater requirements applicable to their work.

― See SWPPP Guide, Chapter 2.B.

Subcontractor(s):

Insert Company or Organization Name:

Insert Name:

Insert Address:

Insert City, State, Zip Code:

Insert Telephone Number:

Insert Fax/Email:

Repeat as necessary

Emergency 24-Hour Contact:

Insert Name:

Insert Telephone Number:

1.3 Nature and Sequence of Construction Activity

Describe the general scope of the work for the project, major phases of construction, etc:

The primary purpose of the project is to replace the existing culvert that spans Drain 10 on

Munger Road with a larger precast concrete box culvert. The existing culvert will be removed including the headwalls, box culvert sections, and portions of the adjacent roadway.

Installation of the new box culvert will include precast box culvert sections, precast wingwalls parallel to Munger Road, cast-in-place (CIP) headwalls, CIP aprons/cutoff walls, riprap aprons, and roadway reconstruction on the northern and southern sides of the structure. Additional construction will include sidewalk, curb, and gutter installation on the east side of the road, sodding, and drainage improvements. Drainage improvements will include construction of valley gutters and installation of inlets, storm sewer pipe, concrete aprons, and expansion of an existing stormwater basin just north of Catamaran Way.

What is the function of the construction activity?

Residential Commercial Industrial Road Construction Linear Utility

Other (please specify):

Estimated Project Start Date: October 2026

Estimated Project Completion Date: March 2027

― Briefly describe the nature of the construction activity and approximate time frames (one or more paragraphs, depending on the nature and complexity of the project).

― For more information, see SWPPP Guide, Chapter 3.A.

1.4 Soils, Slopes, Vegetation, and Current Drainage Patterns

Soil type(s):

According to geotechnical borings and USDA Web Soil Survey information, the common soils in the project area are various fill material, gravel, sand, silt, and minor clay. Various fill material is located near ground surface with varying amounts of gravel, sand, silt, and clay located immediately beneath the ground surface.

Slopes (describe current slopes and note any changes due to grading or fill activities):

Terrain slopes throughout the project area and adjacent land are shallow and generally range between 0% and 2%. The roadway is configured as a 2-lane rural corridor with a crowned roadway. The terrain typically slopes from north to south as indicated on the project plans in

Appendix B.

Drainage Patterns (describe current drainage patterns and note any changes dues to grading or fill activities):

Existing Drainage Patterns

North of Drain 10: Dispersed runoff flows off Munger Road to the east and west towards curb and gutter or roadside borrow ditches. Runoff on the west is conveyed south along curb and gutter to one inlet, which then discharges into a sand and grease trap prior to discharging into

Drain 10. Runoff on the east is currently managed with roadside borrow ditches. Excess water from the roadside ditches can be conveyed south to Streamview Drive, and then east along

Streamview Drive to one inlet. Runoff collected by the inlet is conveyed to a detention pond within the adjacent subdivision.

South of Drain 10: Runoff south of Drain 10 is primarily managed with roadside borrow ditches on both sides of Munger Road. Dispersed runoff flows off Munger Road to the east and west towards roadside borrow ditches with existing low points located south near Catamaran

Way. Excess water from the borrow ditches on the east side can flow east along Catamaran

Way to one inlet. Runoff collected by the inlet is conveyed to a detention pond within the adjacent subdivision. Excess water from the borrow ditches on the west side can flow into a private irrigation supply ditch.

Proposed Drainage Patterns

Proposed drainage patterns will remain generally the same. Runoff will sheet flow off Munger

Road to the east and west. Curb and gutter will be installed on the east side of Munger Road to convey runoff to the south across Drain 10. A valley gutter will be installed at the intersection of Munger Road and Streamview Drive to maintain a southernly flow direction. A low point

Instructions:

― Describe the existing soil conditions at the construction site including soil types, slopes and slope lengths, drainage patterns, and other topographic features that might affect erosion and sediment control.

― Also, note any historic site contamination evident from existing site features and known past usage of the site.

― This information should also be included on your site maps (See SWPPP Guide, Chapter 3.C.).

will be located north of Catamaran Way and a new inlet will be installed on the east side.

Piping from this inlet will discharge into the existing detention pond within the adjacent subdivision. Excavation will occur within the detention pond to increase storage capacity for stormwater. No changes are proposed to drainage patterns on the west side of Munger Road.

Vegetation:

The existing roadside borrow ditches contain little to no vegetation. Dense vegetation including sodding is located immediately beyond the borrow ditches and in the existing detention ponds. Dense vegetation is also located near Drain 10 and along the channel banks.

Other:

*SWPPP Administrator to populate this section as needed*

1.5 Construction Site Estimates

The following are estimates of the construction site.

Total project area: 1.03 acres

Construction site area to be disturbed : 1.03 acres

Percentage impervious area before construction: 35 %

Runoff coefficient before construction: 0.9 (Roadway)

Percentage impervious area after construction: 53 %

Runoff coefficient after construction: 0.9 (Roadway)

Instructions:

― Estimate the area to be disturbed by excavation, grading, or other construction activities, including dedicated off-site borrow and fill areas.

― Calculate the percentage of impervious surface area before and after construction

― Calculate the runoff coefficients before and after construction.

― For more information, see SWPPP Guide, Chapter 3.A and Appendix C.

1.6 Receiving Waters

Description of receiving waters:

The receiving waterbody for the project is an irrigation drain / return ditch called Drain 10 according to Middleton Mill Ditch Company/Drainage District 2, which is the local agency responsible for operation and maintenance of the drain. This waterbody is sometimes referred to as Dry Creek Canal based on publicly available sources. Drain 10 is an irrigation return ditch that primarily collects irrigation runoff from the surrounding area. Treated stormwater runoff from the adjacent subdivisions also discharges into Drain 10. Water can be shifted between Drain 10 and Middleton Canal (located south) at diversion structures upstream and downstream of the project location. Drain 10 typically discharges into Middleton Canal downstream of the project location and water eventually discharges into Mill Slough and the

Boise River.

Description of storm sewer systems:

The existing storm sewer system includes curb and gutter, inlets, storm sewer pipe, sand and grease traps, and detention ponds. One inlet is located north of the existing culvert and discharges into a sand and grease trap before discharging into Drain 10.

Description of unique features that are to be preserved:

Respective features are to be retained and protected as indicated on the project plans.

Description of measures to protect these features:

See project plans for BMP measures.

Description of impaired waters or waters subject to TMDLs:

Drain 10 and Middleton Canal are not listed as impaired waterbodies and do not have any

TMDLs. Mill Slough is listed as impaired for temperature and Boise River is listed as impaired for temperature, sediment, nutrients (nitrogen/phosphorus), and fecal coliform.

Boise River has TMDLs established for sediment, bacteria, and phosphorus.

Instructions:

― List the waterbody(s) that would receive stormwater from your site, including streams, rivers, lakes, coastal waters, and wetlands. Describe each as clearly as possible, such as Mill Creek, a tributary to the Potomac River, and so on.

― Indicate the location of all waters, including wetlands, on the site map.

― Note any stream crossings, if applicable.

― List the storm sewer system or drainage system that stormwater from your site could discharge to and the waterbody(s) that it ultimately discharges to.

― If any of the waterbodies above are impaired and/or subject to Total Maximum Daily Loads (TMDLs), please list the pollutants causing the impairment and any specific requirements in the TMDL(s) that are applicable to construction sites. Your SWPPP should specifically include measures to prevent the discharge of these pollutants.

― For more information, see SWPPP Guide, Chapter 3.A and 3.B.

― Also, for more information and a list of TMDL contacts and links by state, visit www.epa.gov/npdes/stormwater/tmdl.

http://www.epa.gov/npdes/stormwater/tmdl

1.7 Site Features and Sensitive Areas to be Protected

The site does not contain any unique features or sensitive areas to be preserved.

1.8 Potential Sources of Pollution

Potential sources of sediment to stormwater runoff:

• Clearing and grubbing activities

• Excavation and grading activities

• Subgrade preparation (roadway and box culvert)

• Installation of riprap material

• Hauling, stockpiling, and loading of import/waste material

• Track-out from equipment, trucks, or work vehicles

• Landscaping activities (sodding)

Potential pollutants and sources, other than sediment, to stormwater runoff:

Material / Chemical Stormwater Pollutants Location

Asphalt Oil, petroleum distillates Roadway

Concrete Limestone, sand, pH, chromium Pre-cast culverts, pre-cast wing walls, CIP aprons/cutoff walls

Instructions:

― Identify and list all potential sources of sediment, which may reasonably be expected to affect the quality of stormwater discharges from the construction site.

― Identify and list all potential sources of pollution, other than sediment, which may reasonably be expected to affect the quality of stormwater discharges from the construction site.

― Describe unique site features including streams, stream buffers, wetlands, specimen trees, natural vegetation, steep slopes, or highly erodible soils that are to be preserved.

― Describe measures to protect these features.

― Include these features and areas on your site maps.

― For more information, see SWPPP Guide, Chapter 3.A and 3.B.

Material / Chemical Stormwater Pollutants Location

Hydraulic oil / fluids Mineral oil, hydrocarbons Leaks or broken hoses from equipment and vehicles

Gasoline Petroleum products, hydrocarbons Secondary containment / staging area

Diesel Fuel Petroleum products, hydrocarbons, oil & grease Secondary containment / staging area

Fertilizer (liquid or solid pellets) Phosphorus & Nitrogen Newly sodded areas

1.9 Endangered Species Certification

Are endangered or threatened species and critical habitats on or near the project area?

Yes No

Describe how this determination was made:

Determination was made using the online version of Information for Planning and Consultation

(IPaC) website from US Fish & Wildlife Service.

If yes, describe the species and/or critical habitat:

Monarch Butterfly, Suckley’s Cuckoo Bumble Bee, and Slickspot Peppergrass. There are no critical habitats at the project location.

If yes, describe or refer to documentation that determines the likelihood of an impact on identified species and/or habitat and the steps taken to address that impact. (Note, if species are on or near your project site, EPA strongly recommends that the site operator work closely with the appropriate field office of the U.S. Fish and Wildlife Service or National Marine Fisheries

Service. For concerns related to state or tribal listing of species, please contact a state or tribal

Instructions:

― Before beginning construction, determine whether endangered or threatened species or their critical habitats are on or near your site.

― Adapt this section as needed for state or tribal endangered species requirements and, if applicable, document any measures deemed necessary to protect endangered or threatened species or their critical habitats.

― For more information on this topic, see SWPPP Guide, Chapter 3.B.

― Additional information on Endangered Species Act (ESA) provisions is at www.epa.gov/npdes/stormwater/esa http://www.epa.gov/npdes/stormwater/esa official.)

https://ipac.ecosphere.fws.gov/location/CCAZF4WMPBAMJFYNHRS2YUWW7E/resources

1.10 Historic Preservation

Are there any historic sites on or near the construction site?

Yes No

Describe how this determination was made:

Determination was made as part of the Cultural Resource Investigation performed by TAG

Historical Research & Consulting in July 2024.

If yes, describe or refer to documentation that determines the likelihood of an impact on this historic site and the steps taken to address that impact.

The results from the Cultural Resource Investigation indicate the two crossings are eligible for the NRHP. However, the investigation also states the proposed project will have No Adverse

Effect to historic resources.

1.11 Applicable Federal, Tribal, State or Local Programs

There are no applicable federal, tribal, state, or local programs associated with the project area.

However, coverage under the Idaho Construction General Permit is required for the project since land disturbance is greater than 1.0 acre.

― Note other applicable federal, tribal, state or local soil and erosion control and stormwater management requirements that apply to your construction site.

― Before you begin construction, you should review federal and any applicable state, local, or tribal historic preservation laws and determine if there are historic sites on or near your project. If so, you might need to make adjustments to your construction plans or to your stormwater controls to ensure that these historic sites are not damaged.

― For more information, see SWPPP Guide, Chapter 3.B or contact your state or tribal historic preservation officer.

https://ipac.ecosphere.fws.gov/location/CCAZF4WMPBAMJFYNHRS2YUWW7E/resources

1.12 Maps

A general location map is provided in Appendix A and site maps are provided in Appendix B.

Any changes or modifications that deviate from what’s shown on the project plans will be marked on the plans and documented in the SWPPP amendment log in Appendix G.

Instructions:

― Attach site maps. For most projects, a series of site maps is recommended. The first should show the undeveloped site and its current features. An additional map or maps should be created to show the developed site or for more complicated sites show the major phases of development.

These maps should include the following:

― Direction(s) of stormwater flow and approximate slopes before and after major grading activities;

― Areas and timing of soil disturbance;

― Areas that will not be disturbed;

― Natural features to be preserved;

― Locations of major structural and non-structural BMPs identified in the SWPPP;

― Locations and timing of stabilization measures;

― Locations of off-site material, waste, borrow, or equipment storage areas;

― Locations of all waters of the United States, including wetlands;

― Locations where stormwater discharges to a surface water;

― Locations of storm drain inlets; and

― Areas where final stabilization has been accomplished.

― For more information, see SWPPP Guide, Chapter 3.C.

SECTION 2: EROSION AND SEDIMENT CONTROL BMPS

― Describe the BMPs that will be implemented to control pollutants in stormwater discharges. For each major activity identified, do the following

✓ Clearly describe appropriate control measures.

✓ Describe the general sequence during the construction process in which the measures will be implemented.

✓ Describe the maintenance and inspection procedures that will be used for that specific BMP.

✓ Include protocols, thresholds, and schedules for cleaning, repairing, or replacing damaged or failing BMPs.

✓ Identify staff responsible for maintaining BMPs.

✓ (If your SWPPP is shared by multiple operators, indicate the operator responsible for each BMP.)

― Categorize each BMP under one of the following 10 areas of BMP activity as described below:

2.1 Minimize disturbed area and protect natural features and soil

2.2 Phase Construction Activity

2.3 Control Stormwater flowing onto and through the project

2.4 Stabilize Soils

2.5 Protect Slopes

2.6 Protect Storm Drain Inlets

2.7 Establish Perimeter Controls and Sediment Barriers

2.8 Retain Sediment On-Site and Control Dewatering Practices

2.9 Establish Stabilized Construction Exits

2.10 Any Additional BMPs

― Note the location of each BMP on your site map(s).

― For any structural BMPs, you should provide design specifications and details and refer to them. Attach them as appendices to the SWPPP or within the text of the SWPPP.

― For more information, see SWPPP Guide, Chapter 4.

― Consult your state’s design manual or one of those listed in Appendix D of the SWPPP Guide.

― For more information or ideas on BMPs, see EPA’s National Menu of BMPs http://www.epa.gov/npdes/stormwater/menuofbmps

2.1 Minimize Disturbed Area and Protect Natural Features and

Soil

Construction will occur in a manner that minimizes exposed soil and any areas that will have exposed soil for an extended period of time will have temporary BMPs installed to control stormwater runoff. Any stockpiled material will have, at a minimum, perimeter controls installed around the stockpile to control stormwater runoff.

2.2 Phase Construction Activity

* SWPPP administrator will update this section based on the Contractor’s construction schedule *

• Phase I

▪ Describe phase

▪ Duration of phase (start date, end date)

▪ List BMPs associated with this phase

▪ Describe stabilization methods for this phase (describe any temporary stabilization methods that will be used before final stabilization)

• Phase II

▪ Describe phase

▪ Duration of phase (start date, end date)

Instructions:

― Describe the intended construction sequencing and timing of major activities, including any opportunities for phasing grading and stabilization activities to minimize the overall amount of disturbed soil that will be subject to potential erosion at one time. Also, describe opportunities for timing grading and stabilization so that all or a majority of the soil disturbance occurs during a time of year with less erosion potential (i.e., during the dry or less windy season). (For more information, see SWPPP Guide, Chapter 4, ESC Principle 2.) It might be useful to develop a separate, detailed site map for each phase of construction.

― Also, see EPA’s Construction Sequencing BMP Fact Sheet at http://www.epa.gov/npdes/stormwater/menuofbmps/construction/cons_seq)

Instructions:

― Describe the areas that will be disturbed with each phase of construction and the methods (e.g., signs, fences) that you will use to protect those areas that should not be disturbed. Describe natural features identified earlier and how each will be protected during construction activity. Also describe how topsoil will be preserved. Include these areas and associated BMPs on your site map(s) also. (For more information, see SWPPP Guide, Chapter 4, ESC Principle 1.)

― Also, see EPA’s Preserving Natural Vegetation BMP Fact Sheet at www.epa.gov/npdes/stormwater/menuofbmps/construction/perserve_veg http://www.epa.gov/npdes/stormwater/menuofbmps/construction/cons_seq http://www.epa.gov/npdes/stormwater/menuofbmps/construction/perserve_veg

▪ List BMPs associated with this phase

▪ Describe stabilization methods for this phase (describe any temporary stabilization methods that will be used before final stabilization)

Repeat as needed

2.3 Control Stormwater Flowing onto and through the Project

* SWPPP administrator will update this section based on the Contractor’s means and methods *

BMP Description:

Installation Schedule:

Maintenance and

Inspection:

Responsible Staff:

2.4 Stabilize Soils

BMP Description: Sodding will be used to re-vegetate exposed areas as shown on the project plans to match existing conditions of the surrounding area and roadway corridor.

Permanent Temporary

Instructions:

― Describe controls (e.g., interim seeding with native vegetation, hydroseeding) to stabilize exposed soils where construction activities have temporarily or permanently ceased. Also describe measures to control dust generation. Avoid using impervious surfaces for stabilization whenever possible. (For more information, see SWPPP Guide, Chapter 4, ESC Principle 4.)

― Also, see EPA’s Seeding BMP Fact Sheet at www.epa.gov/npdes/stormwater/menuofbmps/construction/seeding

― Describe structural practices (e.g., diversions, berms, ditches, storage basins) including design specifications and details used to divert flows from exposed soils, retain or detain flows, or otherwise limit runoff and the discharge of pollutants from exposed areas of the site. (For more information, see SWPPP Guide, Chapter 4, ESC Principle 3.)

http://www.epa.gov/npdes/stormwater/menuofbmps/construction/seeding

Installation Schedule: After sidewalk installation

Maintenance and

Inspection:

Not applicable

Permanent Temporary

Installation Schedule:

2.5 Protect Slopes

BMP Description: The areas surrounding the culverts are the primary areas in the project limits that have steep slopes. Loose riprap and geotextile erosion control fabric will be placed at the inlets and outlets of culverts to reduce erosion. Proposed detention basin improvements will include 4:1 slopes.

Installation Schedule:

2.6 Protect Storm Drain Inlets

BMP Description: Existing and proposed storm drain inlets on Munger Road will be protected from sediment and debris using inlet protection devices. The selected inlet protection device will be in accordance with ACHD policies and ISPWC standards.

Installation Schedule: Prior to construction activities.

Maintenance and

Inspection:

Weekly and immediately after each storm event. Remove accumulated sediment and repair or replace inlet protection as needed and in accordance with manufacturer’s specifications, ACHD policies, and/or ISPWC standards.

2.7 Establish Perimeter Controls and Sediment Barriers

BMP Description: Straw wattles will be used for perimeter control throughout the project site.

Silt fence may be used in lieu of straw wattles if approved by ACHD. Either technique for perimeter control will comply with ACHD policies and ISPWC standards and installed in accordance with manufacturer’s specifications.

Installation Schedule: Prior to construction activities.

Maintenance and

Inspection:

Inspect perimeter controls every 7 days and immediately after a storm event. Accumulated sediment will be removed and damaged sections will be repaired or replaced to provide adequate perimeter control.

2.8 Retain Sediment On-Site

2.9 Establish Stabilized Construction Exits

BMP Description: Sweeping of the work area at construction entrances and along the adjacent roadways will be performed to prevent sediment from leaving the site.

Installation Schedule: Sweeping will occur at the end of each work day.

Maintenance and

Inspection:

Construction areas and the adjacent roadways will be inspected on a daily basis and sweep will occur at the end of each work day.

Responsible Staff:

Instructions:

― Describe location(s) of vehicle entrance(s) and exit(s), procedures to remove accumulated sediment off-site (e.g., vehicle tracking), and stabilization practices (e.g., stone pads or wash racks or both) to minimize off-site vehicle tracking of sediments and discharges to stormwater. (For more information, see SWPPP Guide, Chapter 4, ESC Principle 9.)

― Also, see EPA’s Construction Entrances BMP Fact Sheet at www.epa.gov/npdes/stormwater/menuofbmps/construction/cons_entrance

― Describe sediment control practices (e.g., sediment trap or sediment basin), including design specifications and details (volume, dimensions, outlet structure) that will be implemented at the construction site to retain sediments on-site. (For more information, see SWPPP Guide, Chapter 4, ESC Principle 8.)

― Also, see EPA’s Sediment Basin BMP Fact Sheet at www.epa.gov/npdes/stormwater/menuofbmps/construction/sediment_basins http://www.epa.gov/npdes/stormwater/menuofbmps/construction/cons_entrance http://www.epa.gov/npdes/stormwater/menuofbmps/construction/sediment_basins

BMP Description: Rock pads or mud mats will be used to prevent sediment from leaving the site. Rock pads or mud mats will be installed and maintained in accordance with ACHD policies and ISPWC specifications.

Installation Schedule: Rock pads or mud mats will be installed prior to construction activities.

Maintenance and

Inspection:

Rock pads or mud mats will be inspected every 7 days. Remove accumulated sediment or replace the BMP as needed.

2.10 Additional BMPs

― Describe additional BMPs that do not fit into the above categories.

SECTION 3: GOOD HOUSEKEEPING BMPS

3.1 Material Handling and Waste Management

BMP Description: Material handling and disposal will be performed in a manner to prevent or reduce the discharge of pollutants to adjacent drainage systems and waterways. All material will be transported, stored, placed, and disposed of in accordance with local, state, and federal regulations and in a manner to prevent or reduce the discharge of pollutants. Dumpsters and trash bins will be implemented as needed and emptied on a routine basis to minimize the spread of trash, litter, and debris.

Installation Schedule: Prior to construction.

Maintenance and

Inspection:

Inspection will occur every 7 days. Waste material will be disposed of in a timely manner and as needed to maintain a clean construction site.

Responsible Staff:

Instructions:

― Describe measures (e.g., trash disposal, sanitary wastes, recycling, and proper material handling) to prevent the discharge of solid materials to receiving waters, except as authorized by a permit issued under section 404 of the CWA (For more information, see SWPPP Guide, Chapter 5, P2 Principle 1.)

― Also, see EPA’s General Construction Site Waste Management BMP Fact Sheet at www.epa.gov/npdes/stormwater/menuofbmps/construction/cons_wasteman

― Describe the key good housekeeping and pollution prevention (P2) BMPs that will be implemented to control pollutants in stormwater.

― Categorize each good housekeeping and pollution prevention (P2) BMP under one of the following seven categories:

3.1 Material Handling and Waste Management

3.2 Establish Proper Building Material Staging Areas

3.3 Designate Washout Areas

3.4 Establish Proper Equipment/Vehicle Fueling and Maintenance Practices

3.5 Allowable Non-Stormwater Discharges and Control Equipment/Vehicle Washing

3.6 Spill Prevention and Control Plan

3.7 Any Additional BMPs

― For more information, see SWPPP Guide, Chapter 5.

― Consult your state’s design manual or resources in Appendix D of the SWPPP Guide.

― For more information or ideas on BMPs, see EPA’s National Menu of BMPs http://www.epa.gov/npdes/stormwater/menuofbmps/construction/cons_wasteman

Installation Schedule:

3.2 Establish Proper Building Material Staging Areas

BMP Description: Material storage areas will be established and managed in a manner to prevent or reduce the discharge of pollutants to adjacent drainage systems and waterways. All material will be stored in a location approved by ACHD. Material storage in the areas surrounding drainage systems, irrigation ditches, or open channels of any kind is prohibited without proper BMPs being installed. All material stored on-site will be clearly and properly labeled. Primary and secondary containment BMPs will be installed as needed to contain any spills or leaks. Temporary BMPs such as perimeter controls will be installed around any stockpiled material including, but not limited to, subbase material, backfill material, or riprap.

Installation Schedule: Prior to material staging

Maintenance and

Inspection:

Staging areas will be formally inspected every 7 days as part of the SWPPP inspections. Informal inspections will occur at the end of each work day to maintain a clean construction area.

― Describe construction materials expected to be stored on-site and procedures for storage of materials to minimize exposure of the materials to stormwater. (For more information, see SWPPP Guide, Chapter 5, P2 Principle 2.)

3.3 Designate Washout Areas

BMP Description: Concrete washout areas will be provided at locations as approved by ACHD.

Washout areas will not be located near drainage systems or immediate areas surrounding irrigation ditches, streams, or open channels of any kind. Commercial washout containers will be used and established in designated areas. Concrete washout on native soils is prohibited.

Installation Schedule: Prior to concrete delivery or production.

Maintenance and

Inspection:

Wash-out areas will be inspected at the end of each work day and after concrete placement has finished. Remove any affected soils, materials, and concrete from the area and dispose of material at an approved landfill.

3.4 Establish Proper Equipment/Vehicle Fueling and

Maintenance Practices

BMP Description: All vehicles and equipment will be maintained on a regular basis to minimize the spread of trash, litter, debris, and liquid pollutants. Trash, litter, and debris will be picked up and placed in waste receptacles. All maintenance activities that involves fluid replacement will be performed in designated ACHD approved areas that are located away from areas surrounding drainage systems, irrigation ditches, streams, or open channels of any kind. Spill kits will be in

Instructions:

― Describe equipment/vehicle fueling and maintenance practices that will be implemented to control pollutants to stormwater (e.g., secondary containment, drip pans, and spill kits) (For more information, see SWPPP Guide, Chapter 5, P2 Principle 4.)

― Also, see EPA’s Vehicle Maintenance and Washing Areas BMP Fact Sheet at www.epa.gov/npdes/stormwater/menuofbmps/construction/vehicile_maintain

― Describe location(s) and controls to eliminate the potential for discharges from washout areas for concrete mixers, paint, stucco, and so on. (For more information, see SWPPP Guide, Chapter 5, P2 Principle 3.)

― Also, see EPA’s Concrete Washout BMP Fact Sheet at www.epa.gov/npdes/stormwater/menuofbmps/construction/concrete_wash http://www.epa.gov/npdes/stormwater/menuofbmps/construction/vehicile_maintain http://www.epa.gov/npdes/stormwater/menuofbmps/construction/concrete_wash designated areas for fuild replacement activities, including but not limited to checking oil, brake fluid, hydraulic fluid, radiator coolant, power steering fluid, transmission fluid, and gear oil.

Installation Schedule: Prior to and during construction.

Maintenance and

Inspection:

Vehicles and equipment will be formally inspected every 7 days as part of the SWPPP inspections. Informal inspections will occur at the end of each work day to maintain a clean construction area.

BMP Description: Mobile refueling will be minimized and equipment will be transported to designated fueling areas when practical. Designated fueling areas will be used and will be located away from areas surrounding drainage systems, irrigation ditches, streams, or open channels of any kind. Spill kits will be located at respective locations and with any mobile refueling equipment. Spills will be managed in accordance with the spill prevention and control plan described in Section 3.6 of this SWPPP.

Installation Schedule: Prior to construction

Maintenance and

Inspection:

Inspection to occur every 7 days and after equipment refueling.

3.5 Control Equipment/Vehicle Washing

BMP Description: All vehicles and equipment will be maintained and free of deleterious material and pollutants. Equipment and vehicle cleaning will occur in designated areas located away from drainage systems, irrigation ditches, streams, or open channels of any kind. Trash, debris, and solid waste will be removed from the interior of all vehicles and equipment and disposed of in waste receptacles. The exterior of all vehicles will be “dry washed” within the project limits using brooms, brushes, or other equipment to remove accumulated dirt and sediment. Vehicle washing with detergents or solvents will be performed off-site. All waste material will be disposed of in appropriate waste receptacles and in accordance with local, state, and federal regulations.

Installation Schedule:

― Describe equipment/vehicle washing practices that will be implemented to control pollutants to stormwater.

(For more information, see SWPPP Guide, Chapter 5, P2 Principle 5.)

― Also, see EPA’s Vehicle Maintenance and Washing Areas BMP Fact Sheet at www.epa.gov/npdes/stormwater/menuofbmps/construction/vehicile_maintain http://www.epa.gov/npdes/stormwater/menuofbmps/construction/vehicile_maintain

Installation Schedule:

3.6 Spill Prevention and Control Plan

Spill prevention and control activities will be implemented for the project. These activities include regular training, emergency notifications, spill response, spill containment, and material disposal. Regular training will be provided to construction personnel on spill prevention and control procedures. The ACHD Project Manager will be notified immediately about any spills that occur, the severity of the spill, and the corrective actions being taken to control and contain the spill. Spill kits will be located at staging areas and at areas where refueling or maintenance activities occur.

Notification to IDEQ must be made immediately if a hazardous material is spilled to surface water or to land such that there is likelihood that it will enter surface waters. Petroleum spills to land of more than 25 gallons require notification within 24 hours. Petroleum spills of any size that causes a sheen on nearby surface water require notification within 24 hours. Spills less than

25 gallons and do not cause a sheen are only required to be reported if cleanup cannot be accomplished within 24 hours.

3.7 Any Additional BMPs

Maintenance and

Instructions:

― Describe any additional BMPs that do not fit into the above categories. Indicate the problem they are intended to address.

― Describe the spill prevention and control plan to include ways to reduce the chance of spills, stop the source of spills, contain and clean up spills, dispose of materials contaminated by spills, and train personnel responsible for spill prevention and control. (For more information, see SWPPP Guide, Chapter 5, P2 Principle 6.)

― Also, see EPA’s Spill Prevention and Control Plan BMP Fact sheet at www.epa.gov/npdes/stormwater/menuofbmps/construction/spill_control http://www.epa.gov/npdes/stormwater/menuofbmps/construction/spill_control

3.8 Allowable Non-Stormwater Discharge Management

List allowable non-stormwater discharges and the measures used to eliminate or reduce them and to prevent them from becoming contaminated:

Any changes in construction activities that results in other allowable non-stormwater discharges will be identified and the SWPPP will be amended.

― Identify all allowable sources of non-stormwater discharges that are not identified. The allowable non-stormwater discharges identified might include the following (see your permit for an exact list):

✓ Waters used to wash vehicles where detergents are not used

✓ Water used to control dust

✓ Potable water including uncontaminated water line flushings

✓ Routine external building wash down that does not use detergents

✓ Pavement wash waters where spills or leaks of toxic or hazardous materials have not occurred (unless all spilled material has been removed) and where detergents are not used

✓ Uncontaminated air conditioning or compressor condensate

✓ Uncontaminated ground water or spring water

✓ Foundation or footing drains where flows are not contaminated with process materials such as solvents

✓ Uncontaminated excavation dewatering

✓ Landscape irrigation

― Identify measures used to eliminate or reduce these discharges and the BMPs used to prevent them from becoming contaminated.

SECTION 4: SELECTING POST-CONSTRUCTION BMPs

BMP Description: The project will require expansion of the existing stormwater basin located near the intersection of Munger Road and Catamaran Way. Once expansion is complete, sod will be replaced on the pond side slopes and wetland sod will be installed on the bottom of the basin.

Installation Schedule: After construction of expanded stormwater basin.

Maintenance and

Inspection:

N/A

― Describe all post-construction stormwater management measures that will be installed during the construction process to control pollutants in stormwater discharges after construction operations have been completed. Examples of post-construction BMPs include the following:

✓ Biofilters

✓ Detention/retention devices

✓ Earth dikes, drainage swales, and lined ditches

✓ Infiltration basins

✓ Porous pavement

✓ Other proprietary permanent structural BMPs

✓ Outlet protection/velocity dissipation devices

✓ Slope protection

✓ Vegetated strips and/or swales

― Identify any applicable federal, state, local, or tribal requirements for design or installation.

― Describe how low-impact designs or smart growth considerations have been incorporated into the design.

― For any structural BMPs, you should have design specifications and details and refer to them. Attach them as appendices to the SWPPP or within the text of the SWPPP.

― For more information on this topic, see your state’s stormwater manual.

― You might also want to consult one of the references listed in Appendix D of the SWPPP Guide.

― Visit the post-construction section of EPA’s Menu of BMPs at: www.epa.gov/npes/menuofbmps http://www.epa.gov/npes/menuofbmps

SECTION 5: INSPECTIONS

5.1 Inspections

1. Inspection Personnel: Identify the person(s) who will be responsible for conducting inspections and describe their qualifications:

2. Inspection Schedule and Procedures:

Describe the inspection schedules and procedures you have developed for your site (include frequency of inspections for each BMP or group of BMPs, indicate when you will inspect, e.g., before/during/and after rain events, spot inspections):

Describe the general procedures for correcting problems when they are identified. Include responsible staff and time frames for making corrections:

Attach a copy of the inspection report you will use for your site.

REFERENCE ATTACHMENT

Instructions:

― Identify the individual(s) responsible for conducting inspections and describe their qualifications.

Reference or attach the inspection form that will be used.

― Describe the frequency that inspections will occur at your site including any correlations to storm frequency and intensity.

― Note that inspection details for particular BMPs should be included in Sections 2 and 3.

― You should also document the repairs and maintenance that you undertake as a result of your inspections.

These actions can be documented in the corrective action log described in Part 5.3 below.

― For more on this topic, see SWPPP Guide, Chapters 6 and 8.

― Also, see suggested inspection form in Appendix B of the SWPPP Guide.

5.2 Delegation of Authority

Duly Authorized Representative(s) or Position(s):

Insert Name:

Insert Position:

Insert Address:

Insert City, State, Zip Code:

Insert Telephone Number:

Insert Fax/Email:

Attach a copy of the signed delegation of authority form in Appendix K.

5.3 Corrective Action Log

Corrective Action Log:

INSERT LOG HERE or REFERENCE ATTACHMENT

Instructions:

― Create here, or as an attachment, a corrective action log. This log should describe repair, replacement, and maintenance of BMPs undertaken as a result of the inspections and maintenance procedures described above. Actions related to the findings of inspections should reference the specific inspection report.

― This log should describe actions taken, date completed, and note the person that completed the work.

― Identify the individual(s) or specifically describe the position where the construction site operator has delegated authority for the purposes of signing inspection reports, certifications, or other information.

― Attach the delegation of authority form that will be used.

― For more on this topic, see SWPPP Guide, Chapter 7.

SECTION 6: RECORDKEEPING AND TRAINING

6.1 Recordkeeping

Records will be retained for a minimum period of at least 3 years after the permit is terminated.

Date(s) when major grading activities occur:

Date(s) when construction activities temporarily or permanently cease on a portion of the site:

INSERT LOG HERE or REFERENCE ATTACHMENT

Date(s) when an area is either temporarily or permanently stabilized:

6.2 Log of Changes to the SWPPP

Log of changes and updates to the SWPPP

Instructions:

― Create a log here, or as an attachment, of changes and updates to the SWPPP. You should include additions of new BMPs, replacement of failed BMPs, significant changes in the activities or their timing on the project, changes in personnel, changes in inspection and maintenance procedures, updates to site maps, and so on.

― The following is a list of records you should keep at your project site available for inspectors to review:

― Dates of grading, construction activity, and stabilization (which is covered in Sections 2 and 3)

― A copy of the construction general permit (attach)

― The signed and certified NOI form or permit application form (attach)

― A copy of the letter from EPA or/the state notifying you of their receipt of your complete NOI/application (attach)

― Inspection reports (attach)

― Records relating to endangered species and historic preservation (attach)

― Check your permit for additional details

― For more on this subject, see SWPPP Guide, Chapter 6.C.

6.3 Training

Individual(s) Responsible for Training:

INSERT TEXT or TABLE HERE

Describe Training Conducted:

• General stormwater and BMP awareness training for staff and subcontractors:

• Detailed training for staff and subcontractors with specific stormwater responsibilities:

SECTION 7: FINAL STABILIZATION

― Describe procedures for final stabilization. If you complete major construction activities on part of your site, you can document your final stabilization efforts for that portion of the site. Many permits will allow you to then discontinue inspection activities in these areas (be sure to check your permit for exact requirements). You can amend or add to this section as areas of your project are finally stabilized.

― Update your site plans to indicate areas that have achieved final stabilization.

― Note that dates for areas that have achieved final stabilization should be included in Section 6, Part 6.1 of this SWPPP.

― For more on this topic, see SWPPP Guide, Chapter 9.

― Training your staff and subcontractors is an effective BMP. As with the other steps you take to prevent stormwater problems at your site, you should document the training that you conduct for your staff, for those…