aka-pfh58-1_SWPPP for compilation_Final.pdf

Stormwater Pollution Prevention Plan

SWPPP

For:

Neck Lake Road Reconstruction NPOWI Hwy. to Marine Access Facility Jct.

AK PFH 58(1)

Hyder, Prince of Wales Island, Alaska 99901

Federal Highway Administration, Western Federal Lands Highway Division

Project Engineer:

General Contractor: ___

Table of Contents

SWPPP TABS

TAB 1: SWPPP Narrative

TAB 2: APDES Permit (Construction General Permit)

TAB 3: NOI, ADEC Acknowledgement, Other Applicable Correspondence

TAB 4: Delegation of Authority

TAB 5: Site Maps (Indicate Wetlands, Waters, other Waterbodies)

TAB 6: Erosion/Sediment Control Plan Sheets (Plan Set and BMP Typical Details)

TAB 7: Revegetation Plan (if applicable)

TAB 8: SWPPP Amendment Log

TAB 9: Inspection Reports

TAB 10: Corrective Action Log

TAB 11: Water Quality Monitoring, Reporting Requirements, and Reports

TAB 12: Training Certificates and SWPPP Training Log

TAB 13: Government-Selected Waste, Borrow, Staging Sites (Indicate BMPs at Each Site)

TAB 14: Grading and Stabilization Log

TAB 15: Hazardous Spill Plan or Spill Prevention, Control, and Countermeasures (SPCC)

TAB 16: Endangered Species Act (ESA) & Cultural Resources (Section 106) Documentation

TAB 17: Quality Assurance Checklist

TAB 18: APDES Notice of Termination (NOT)

Tab 1 - SWPPP Narrative

Revise and update as needed per SCR 107 and SCR 157

Storm Water Pollution Prevention Plan (SWPPP)

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 1 of 37

ALASKA DEPARTMENT OF ENVIRONMENTAL CONSERVATION

2021 CONSTRUCTION GENERAL PERMIT

SWPPP TEMPLATE

Instructions

To help you develop the narrative section of your construction site SWPPP, the DEC has created this electronic SWPPP template, designed to guide you through the SWPPP development process and ensure your SWPPP addresses all the necessary elements stated in the Construction General Permit (CGP). You should use this template with the Alaska Storm Water Guide, available on the ADEC’s website at http://dec.alaska.gov/media/13246/akswguide.pdf.

This template covers the SWPPP elements required by Alaska’s construction general permit; however, you must customize this template to reflect the conditions at your site.

Using the SWPPP Template

Each section of this template includes “instructions” and space for “project information.” You should read the instructions for each section as you complete the project information. This template was developed in Word so 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 responsibilities are clearly described.

Modify this SWPPP template so it meets the needs of your project. Consider adding permit citations in the SWPPP when you address a specific permit requirement.

http://dec.alaska.gov/water/wastewater/stormwater/guidance/ http://dec.alaska.gov/media/13246/akswguide.pdf

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 2 of 37

Storm Water Pollution Prevention Plan For

Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct.

AK PFH 58(1)

Hyder, Prince of Wales Island, Alaska 99901

Operator(s) Insert Company or Organization Name

Insert Name Insert Address

Insert City, State, Zip Code Insert Telephone Number

Insert Fax/Email

SWPPP Contact(s) FHWA, Western Federal Lands Highway Division

610 East Fifth Street Vancouver, WA 98661-3801

360-619-7700 360-619-7846

SWPPP Preparation Date 12/9/2022

Estimated Project Dates Start of Construction Completion of Construction

8/14/2023 11/1/2024

APDES Project or Permit Authorization Number:

HPS-4ZBE-9TA48

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 3 of 37

RECORD OF SWPPP AMENDMENTS

See Tab 8 for SWPPP Amendments

OPERATOR PLAN

AUTHORIZATION/CERTIFICATION/DELEGATION

(To be signed by Responsible Corporate Officer)

*Place signed copy of this form in Tab 4 of the SWPPP

I state that based on my review this SWPPP meets the minimum requirements of the Construction General Permit and that the [Contractor TBD] has day-to-day operational control of the project site.

[Contractor TBD] is responsible for the maintenance and implementation of the SWPPP including inspections, documentation, and application of the Best Management Practices at the site. [Contractor TBD] will notify all subcontractors of the requirement of this SWPPP.

FHWA Western Federal Lands Highway Division has operational control over the project specifications, including the ability to make changes to the project specifications.

I hereby designate FHWA Western Federal Lands Highway Division, Project Engineer, SWPPP Administrator as my authorized representative. This designee is responsible for the overall operations of the site and will be responsible for the implementation of the Storm Water Pollution Prevention Plan, compliance with the Construction General Permit, selecting and implementing additional Best Management Practices as conditions warrant, and signing all inspection reports required.

I certify under penalty of law that this document and all attachments were prepared under direction of FHWA Western Federal Lands Roadway Division in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.

FHWA Western Federal Lands Roadway Division

Signature Date

Scott Smithline Environmental Manager Printed Name Title

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 5 of 37

(Intentionally left blank)

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 6 of 37

TABLE OF CONTENTS

1.0 PERMITTEE (5.3.1)

1.1 Operator(s)/Contractor(s)

1.2 Subcontractors

2.0 STORM WATER CONTACTS (5.3.2)

3.0 PROJECT INFORMATION (5.3.3)

3.1 Project Information

3.2 Project Site Specific Conditions (5.3.3)

4.0 NATURE OF CONSTRUCTION ACTIVITY (5.3.4)

4.1 Scope of Work

4.2 Project Function (5.3.4.1)

4.3 Support Activities (As Applicable)

4.4 Sequence and Timing of Soil-disturbing Activities (5.3.4.2)

4.5 Size of property and total area expected to be disturbed (5.3.4.3)

4.6 Identification of All Potential Pollutant Sources (5.3.4.5)

5.0 SITE MAPS (5.3.5)

6.0 DISCHARGES

6.1 Locations of Other Industrial Storm Water Discharges (5.3.8)

6.2 Allowable Non-Storm Water Discharges (1.4.3; 4.3.7; 5.3.9)

7.0 DOCUMENTATION OF PERMIT ELIGIBILITY RELATED TO TOTAL MAXIMUM DAILY LOADS (3.2, 5.6)

7.1 Identify Receiving Waters (5.3.3.3)

7.2 Identify TMDLs (5.6.1)

8.0 DOCUMENTATION OF PERMIT ELIGIBILITY RELATED TO ENDANGERED SPECIES (3.3, 5.7)

8.1 Information on Endangered or Threatened Species or Critical Habitat (5.7.1)

9.0 APPLICABLE FEDERAL, STATE, TRIBAL, OR LOCAL REQUIREMENTS (4.15)

10.0 CONTROL MEASURES/BEST MANAGEMENT PRACTICES (4.0; 5.3.6)

10.1 Minimize Amount of Soil Exposed During Construction Activity (4.2.2)

10.2 Maintain Natural Buffer Areas (4.2.3)

10.3 Control Storm Water Discharges and Flow Rates (4.2.5)

10.3.1 Protect Steep Slopes (4.2.6)

10.4 Storm Water Inlet Protection Measures (4.3.1)

10.5 Water Body Protection Measures (4.3.2)

10.6 Down-Slope Sediment Controls (4.3.3)

10.7 Stabilized Construction Vehicle Access and Exit Points (4.3.4)

10.8 Dust Generation and Track-Out from Vehicles (4.3.5 and 4.3.6)

10.9 Soil Management (4.3.7)

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 7 of 37

10.10 Authorized Non-Storm Water Discharges (4.3.8)

10.11 Sediment Basins (4.3.9)

10.12 Dewatering (4.4)

10.13 Soil Stabilization (4.5, 5.3.6.3)

10.14 Treatment Chemicals (4.6; 5.3.6.4)

10.15 Treatment Chemicals (4.6.1)

10.15.1 Treatment Chemical Use Procedures (4.6.2)

10.15.2 Application of Treatment Chemicals (4.6.3)

10.16 Active Treatment System Information or cationic treatment chemicals (4.6.7)

10.17 Good Housekeeping Measures (4.8)

10.17.1 Washing of Equipment and Vehicles (4.8.1)

10.17.2 Fueling and Maintenance Areas (4.8.2)

10.17.3 Staging and Material Storage Areas (4.8.3)

10.17.4 Washout of Applicators/Containers Used for Paint, Concrete, and Other Materials (4.8.4)

10.17.5 Fertilizer or Pesticide Use (4.8.5)

10.18 Spill Notification (4.9)

10.19 Construction and Waste Materials (4.8.6, 5.3.7)

11.0 INSPECTIONS (5.4; 6.0)

11.1 Inspection Schedules (5.4.1.2; 6.1; 6.2)

11.2 Inspection Form or Checklist (5.4.1.3; 6.7)

11.3 Corrective Action Procedures (5.4.1.4; 8.0)

11.4 Inspection recordkeeping (5.4.2)

12.0 MONITORING PLAN (If Applicable) (5.5; 7.0)

12.1 Determination of Need for Monitoring Plan

12.2 Monitoring Plan Development

12.3 Monitoring Considerations

13.0 POST-AUTHORIZATION RECORDS (5.8)

13.1 Additional Documentation Requirements (5.8.2)

13.1.1 Records of Employee Training (4.14; 5.8.2.7)

14.0 MAINTAINING AN UPDATED SWPPP (5.9)

14.1 Log of SWPPP Modifications (5.9.2)

14.2 Deadlines for SWPPP Modifications (5.9.3)

15.0 ADDITIONAL SWPPP REQUIREMENTS (5.10)

15.1 Retention of SWPPP (5.10.1)

15.2 Main Entrance Signage (5.10.2)

15.3 Availability of SWPPP (5.10.3)

15.4 Signature and Certification (5.10.4)

15.5 Submittal of a Modification to NOI (2.7)

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 8 of 37

APPENDICES (w/applicable SWPPP Tab reference)

A. Site Maps and Drawings (refer to Tabs 5 and 6) B. BMP Details (refer to Tab 6) C. Project Schedule (refer to latest project schedule provided by Contractor) D. Supporting Documentation: (refer to Tabs 11 and 16)

• TMDLs

• Endangered Species

• Other Permits or Requirements

E. Delegation of Authority, Subcontractor Certifications (Refer to Tab 4) F. Permit Conditions: (Refer to Tabs 2 and 3)

• Copy of Signed Notice of Intent

• Copy of Letter from ADEC Authorizing Coverage, with ADEC NOI Tracking Number

• Copy of 2021 Construction General Permit

G. Grading and Stabilization Records (Refer to Tab 14) H. Monitoring Plan (If Applicable) and Reports (Refer to Tab 11) I. Training Records (Refer to Tab 12) J. Corrective Action Log (Refer to Tab 10) K. Inspection Records (Refer to Tab 9)

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 9 of 37

(Intentionally left blank)

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 10 of 37

1.0 PERMITTEE (5.3.1)

Identify permittee and any subcontractors.

1.1 Operator(s)/Contractor(s)

Operator Information Organization: Name: Title:

Phone: Fax (optional): Email:

Mailing Address: Street (PO Box):

City: State: Zip:

Area of Control

Day-to-day operational control of those activities at a site which are necessary to ensure compliance with a SWPPP or other permit conditions.

Owner/Operator Information

FHWA Western Federal Lands Scott Smithline Environmental Manager Phone: Fax (optional): Email:

(360) 619-7700 (360) 619-7846 scott.smithline@dot.gov Mailing Address: Street (PO Box):

610 East Fifth Street City: State: Zip:

Vancouver WA 98661-3801 Area of Control

Operational control over construction plans and specifications, including the ability to make modifications to those plans and specifications.

Repeat as necessary.

1.2 Subcontractors

Subcontractor Information

Phone: Fax (optional): Email:

Mailing Address: Street (PO Box):

City: State: Zip:

Area of Control Insert Area of Control (if more than one operator at site)

Repeat as necessary to include all subcontractors.

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 11 of 37

2.0 STORM WATER CONTACTS (5.3.2)

Identify the qualified persons responsible for the following required positions (note: a small project may have all these responsibilities carried out by one person):

• Storm Water Lead (5.3.2); person updating the SWPPP (5.3.2.2); Person(s) Conducting Inspections (5.3.2.3); Person(s) Conducting Monitoring (if applicable, 5.3.2.4), and Person(s) Operating Active Treatment System (if applicable, 5.3.2.5).

• Document that the named individuals are Qualified Persons as described in Appendix C of the CGP.

Include documentation of qualifications in Tab 4 of the SWPPP.

Qualified Personnel Responsibility

Storm Water Lead Company Name Address City, State, Zip Code Telephone # Fax/Email

Authority to stop and/or modify construction activities as necessary to comply with the SWPPP and the terms and conditions of the permit.

SWPPP Preparer FHWA Western Federal Lands Steve Morrow 610 East Fifth Street Vancouver, WA 98661-3801

(360) 619-7811

(360) 619-7846

Possess the skills to assess conditions at the construction site that could impact storm water quality. Familiar with Part 5 as a means to implement the permit.

Storm Water Inspector Company Name Address City, State, Zip Code Telephone # Fax/Email

Assess conditions at the construction site that could impact storm water quality. Assess the effectiveness of any erosion and sediment control measures selected to control the quality of storm water discharge, and familiar with Part 6 as a means to ensure compliance with the permit.

Monitoring Person (If Applicable) Company Name Address City, State, Zip Code Telephone # Fax/Email

Knowledgeable in the principles and practices of water quality monitoring who is familiar with Part 7 and the monitoring plan for the site and how to conduct water quality sampling, testing, and reporting.

Active Treatment System Operator (If Applicable) Company Name Address City, State, Zip Code Telephone # Fax/Email

Knowledgeable in the principles and practices of treatment systems that employs chemical coagulation, chemical flocculation or electrocoagulation to aid in the treatment of storm water runoff. Familiar with Part 4.5 as a means to implement and comply with the permit.

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 12 of 37

3.0 PROJECT INFORMATION (5.3.3)

This section gathers all relevant site data together to assist with filing for permit coverage.

3.1 Project Information

Project Name:

Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct.

Location Address:

Street: Borough or similar government subdivision:

Enter Text Prince of Wales City: State: Zip:

Hyder Alaska 99901 Latitude (decimal degree, 5 places): Longitude (decimal degree, 5 places):

56.08984722 (start); 56.09500278 (finish) -133.20561111 (start); -133.15490833 (finish)Y Determined By: GPS ☐ Web Map: Enter Text ☐ USGS Topo Map, Scale: Enter Text ☐ Other: Enter Text

3.2 Project Site Specific Conditions (5.3.3)

Instructions:

Briefly describe the existing site conditions, including:

• Mean annual precipitation based on nearest appropriate weather station (5.3.3.1). Precipitation data for Alaska weather-recording stations are available at the Western Regional Climate Center Internet website: https://xmacis.rcc-acis.org/.

• Soils, topography, drainage patterns, approximate growing season, and vegetation.

• Evidence of site contamination.

Mean annual precipitation based on nearest weather stations (inches): Insert Text

Soil Type(s) and Slopes (describe soil type(s) and current slopes; note any changes due to grading or fill activities): The regional geology of northern Prince of Wales Island is comprised of bedrock of the Alexander Terrane, consisting of three regional geologic units listed in order from the beginning of project to end of project: Heceta Limestone, Bay of Pillars Formation, Descon Formation. The glacial history of southeast Alaska plays an important role in the present topography and distribution of sedimentary deposits consisting of sediments mantling bedrock that have been overridden by glacial ice .

Landscape Topography: The topography of the project area is characterized by mountainous terrain less than about 1,000 feet in elevation. The mountains are divided by valleys and lakes trending generally either north to northwest, or to the west. The project lies completely within the North Prince of Wales-Kuiu Carbonates ecological subsection. This subsection is predominately underlain by carbonate (limestone and marble) bedrock and smaller amounts of conglomerate, mudstone, and sandstone. Well-developed karst landscapes characterize this subsection. The soils in the area range from moderately good to poor drainage.

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

Drainage varies throughout the project area, however with 0ver 85 inches of precipitation annually much of the project area drains slowly with soils saturated to the surface and mucky soils.

Approximate Growing Season: May 15 to September 15

Type of Existing Vegetation: mature spruce trees, alder and willow shrubs. Moss and grasses cover the organic rich areas.

https://xmacis.rcc-acis.org/

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 13 of 37

Historic site contamination evident from existing site features and known past usage of the site: A Phase 1 Environmental Site Assessment conducted in August 2014 was conducted in general conformance with the scope and limitations of ASTM Practice E 1527-13 and USEPA AAI standards for the Neck Lake Road Reconstruction project corridor. The ADEC Contaminated Sites Database (ADEC 2014) listed the Whale Pass Log Transfer Facility as having been issued a No Further Action approval letter from Alaska DEC for remediation of soil contaminated with diesel fuel; institutional controls are in place for residual groundwater contamination in fractured bedrock. Based on results of this Phase I ESA, there is a low likelihood of contamination present in the project corridor.

4.0 NATURE OF CONSTRUCTION ACTIVITY (5.3.4)

4.1 Scope of Work

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

The Project is to reconstruct Neck Lake Road from the junction with North Prince of Wales Island (NPOWI) Road to the Whale Pass Seaplane and upgrade the road from a single lane logging road to an AASHTO Geometric Design of Very Low-Volume (<400 ADT) Local Roads with an 18' travel way with 1' shoulders. The road would be aggregate surfacing depth of 12 inches and a double-shot Bituminous Surface Treatment. The 8.0-mile Neck Lake Road Reconstruction project was designed in two separate segments. Segment 1 involves Forest Road (FR) 25 from Forest Highway (FH) 43 to the log transfer facility (LTF) approach. Segment 1 is about 3.9 miles long and has been designed for a design speed of 30 mph.

4.2 Project Function (5.3.4.1)

Briefly describe the function of the construction activity (e.g., low-density residential, shopping mall, subdivision, airport, highway, etc.).

Neck Lake Road is Very Low-Volume (<400 ADT) Local Road with an 18' travel way with 1' shoulders.

4.3 Support Activities (As Applicable)

Support activities for this project are:

Support Activity Location Dedicated

Yes No

Concrete Batch Plant ☐ Asphalt Batch Plant ☐ Equipment Staging Yards ☐ Material Storage Areas ☐ Excavated Material Disposal Areas ☐ Borrow Areas ☐

4.4 Sequence and Timing of Soil-disturbing Activities (5.3.4.2) Briefly describe the intended sequence and timing of activities that disturb soils at the site.

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 14 of 37

Construction will begin with Notice To Proceed of August 15, 2023. The project will reach substantial completion October 31, 2024.

4.5 Size of property and total area expected to be disturbed (5.3.4.3)

• Estimate the area to be disturbed by excavation, grading, or other construction activities, including support activities described in CGP Section 1.4.2.3 (e.g., concrete or asphalt batch plants, equipment staging yards, material storage areas, excavated material disposal areas, and/or borrow areas).

• Calculate the percentage of impervious surface area before and after construction.

• Calculate the run-off coefficients before and after construction.

The following are estimates of the construction site:

Total Project Area: ................................................................. 25 acres

Construction-site area to be disturbed: ................................ 15 acres

Percentage impervious area BEFORE construction: .............. 5 %

Runoff coefficient BEFORE construction: .............................. 0.9

Percentage impervious area AFTER construction: ................ 5 %

Runoff coefficient AFTER construction: ................................. 0.9

4.6 Identification of All Potential Pollutant Sources (5.3.4.5)

• Identify and list all potential sources of sediment from construction materials and activities which may affect the quality of storm water discharges from the construction site.

• Identify and list all potential sources of pollution, other than sediment, from construction materials and activities which may affect the quality of storm water discharges from the construction site.

Potential sources of sediment to storm water runoff:

Se le ct ed

A ct iv ity

(X

Construction Activity

Potential Construction Site Pollutants

Se di m en t

N ut ri en ts

B ac te ri a pH

O il

G re as e

T ra sh

D eb ri s

Pe st ic id es

H ea vy M et al s

O th er

Po llu ta nt s

Clearing, excavating, and grading X X Fill of roadway embankment, backfill at structures X X Vehicle/equipment fueling and maintenance X X X Vehicle/equipment use and storage X X Sanitary/septic waste X X Dewatering operations X X Drilling and blasting operations X X X Concrete washout and waste X X Structure construction/painting/cleaning X X X X Demolition and debris disposal X X X X X Solid waste (trash and debris) X X Hazardous waste or contaminated spills X X X Paving operations X X

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 15 of 37

Landscaping operations X X X Mining, rock extraction, crushing X X X X

Potential pollutants and sources, other than sediment, to storm water runoff:

Rock from the Descon Formation exists along Segments 1 and 2 and was analyzed for its acid-generating and acid-neutralizing potential. Areas along Segment 2, from milepost (MP) 78.6 to MP 79.3 on NFSR 3000000, have the potential to generate acid rock drainage (ARD) and would not be used in the proposed road improvements.

Rock from these areas would not be used in areas that have the potential for surface water or groundwater exposure. Also, material would not be used from the quarry at the easternmost 0.2 mile of the project in the town of Whale Pass on NFSR 3065000 that is privately-owned.

Trade Name Material Storm Water Pollutants Location

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 16 of 37

5.0 SITE MAPS (5.3.5)

The SWPPP must include a legible site map (or set of maps for large projects) showing the entire site and identifying the following site-specific information:

• North arrow and bar scale

• Property boundaries

• Locations where earth-disturbing activities will occur, noting phasing

• Location of areas that will not be disturbed and natural features to be preserved

• Location of all storm water conveyances including ditches, pipes, and swales

• Locations of storm water inlets and outfalls, with a unique identification code for each outfall

• Locations where storm water and/or authorized non-storm water discharges to waters of the U.S.

(including wetlands) or a Municipal Separate Storm Sewer System (MS4).

• Direction of storm water flow and approximate slopes anticipated after grading activities

• Locations where control measures will be or have been installed

• Locations where exposed soils will be or have been stabilized

• Locations where post-construction storm water controls will be or have been installed

• Locations of support activities

• Locations where authorized non-storm water will be used

• Locations and sources of run-on to the site from adjacent property that may contain quantities of pollutants which could be exposed to precipitation.

• Locations of all waters of the U.S. on-site (including significant wetland areas ≥10,000 ft2) and those within 2,500 feet of the site boundary

• Location of existing public water system (PWS) drinking water protection areas (DWPA) for PWS sources (e.g., springs, wells, or surface water intakes) that intersect the boundary of the project area.

(The DWPAs can be found using the interactive web map application, “Alaska DEC Drinking Water Protection Areas” located at http://dec.alaska.gov/das/GIS/apps.htm.)

• Sampling point(s), if applicable

• Areas where final stabilization has been accomplished

• Staging and material storage areas (construction materials, hazardous materials, fuels, etc.)

• Dumpsters

• Porta-potties

• Concrete, paint, or stucco washout areas

• Stabilized construction exits

Include a general location map in Tab 5 of this SWPPP. (5.3.4.4)

Include site maps in Tab 5 of this SWPPP. (5.3.5)

6.0 DISCHARGES

Subject to compliance with the terms and conditions of the CGP, the permittee is authorized to discharge pollutants in storm water discharges from the site. If the permittee is eligible for coverage under this permit and does not comply with the requirements of this general permit, the permittee may be in violation of this general permit for otherwise eligible discharges.

Instructions:

• Describe and identify the location of any storm water discharge associated with support activities, including discharges from dedicated asphalt and concrete plants covered by this permit (5.3.8).

• Identify all allowable sources of non-storm water discharges to be used at the site (5.3.9).

http://dec.alaska.gov/das/GIS/apps.htm

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 17 of 37

6.1 Locations of Other Industrial Storm Water Discharges (5.3.8) N/A

6.2 Allowable Non-Storm Water Discharges (1.4.3; 4.3.7; 5.3.9) Applicable to this Project

(check all that apply)

Potential Non-Stormwater Discharges Control Measures

To be completed by contractor

Waters used to wash vehicles where detergents are not used Water used to control dust Do not overwater.

Potable water including uncontaminated water line flushings Construction dewatering (uncontaminated) Monitor to ensure sediment laden water does not reach a water body.

Ground water or spring water (uncontaminated) Monitor to ensure sediment laden water does not reach a water body.

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

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

Landscape irrigation Monitor to ensure sediment laden water does not reach a water body.

Discharges from emergency fire-fighting activities N/A Fire hydrant flushings Uncontaminated air conditioning or compressor condensate

7.0 DOCUMENTATION OF PERMIT ELIGIBILITY RELATED TO

TOTAL MAXIMUM DAILY LOADS (3.2, 5.6)

If the permittee is discharging into a water body with an EPA-established or approved Total Maximum Daily Load (TMDL), the permittee must implement measures to ensure the discharge of pollutants from the site is consistent with the assumptions and requirements of the TMDL. Refer to the CGP for additional requirements.

The SWPPP must include documentation supporting a determination of permit eligibility with regard to waters that have a TMDL.

7.1 Identify Receiving Waters (5.3.3.3)

Instructions:

• List any water bodies that would receive storm water from the site, including rivers, streams, lakes, coastal waters, and wetlands. Describe each as clearly as possible (e.g., Noyes Slough, a tributary to the Chena River, etc.).

• Indicate location of all water bodies on site map.

• Note any stream crossings, if applicable.

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 18 of 37

• List storm sewer and/or drainage systems into which storm water from the site could discharge and water body(ies) the system(s) ultimately discharge to.

Description of receiving waters: Neck Lake. 11 un-named streams. The streams at the west end of the study area flow into wetlands that drain to Neck Lake. Streams at the south end flow toward Whale Passage. Some of the streams flowing into Whale Passage are tidally influenced.

Description of storm sewer and/or drainage systems: Insert Text

Other: Insert Text

7.2 Identify TMDLs (5.6.1)

Determine whether the project may discharge into a water body with an EPA-established or approved Total Maximum Load (TMDL) for turbidity or sediment.

Instructions:

• See ADEC web site for a listing of impaired water bodies: http://dec.alaska.gov/water/water-quality/impaired-waters.

• Look through all impaired water body categories -- 4a, 4b, and 5.

Is an EPA-established or approved TMDL published for the receiving water(s) listed in Section 7.1? Yes No.

If YES, list the TMDL(s) here. Include a summary of consultations with state or federal TMDL authorities.

Include correspondence or other supporting documentation in Tab 11.

TMDL: N/A

Summary of consultation with state or federal TMDL authorities (5.6.2): Alaska DEC Website

Measures taken to ensure compliance with TMDL (5.6.3): N/A

8.0 DOCUMENTATION OF PERMIT ELIGIBILITY RELATED TO

ENDANGERED SPECIES (3.3, 5.7)

The SWPPP must include documentation supporting a determination of permit compliance with regard to the Endangered Species Act.

Instructions:

• Determine whether endangered or threatened species or their critical habitats are on or near your site.

• Attach any correspondence for any stage of the project planning between the USFWS, EPA, National Marine Fisheries Service (NMFS), or others and the permittee regarding listed species and critical habitat, including any notification that delays the permittee’s authorization to discharge under this permit (Tab 16).

8.1 Information on Endangered or Threatened Species or Critical Habitat (5.7.1)

Are endangered or threatened species and critical habitats on or near the project area? Yes No.

http://dec.alaska.gov/water/water-quality/impaired-waters http://dec.alaska.gov/water/water-quality/impaired-waters

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 19 of 37

Describe how this determination was made: . No ESA listed species in project. Short-tail Albatross was listed as Endangered in 2013. The Short-tail Albatross inhabits the open ocean; nests on remote islands in the western Pacific. Sub-adults are more wide ranging and have been found off the coast of the US, strongly associated with commercial fishing vessels and trawlers. USFS only look at albatross from energy development along the shore and only if that is on the outer coast.

Will species or habitat be adversely affected by storm water discharge? Yes No.

Describe the species and/or critical habitat, if species or habitat will be affected by storm water discharge.

Insert Text

Include any agency correspondence in the SWPPP (5.7.4).

Provide summary of necessary measures (5.7.5): Insert Text

9.0 APPLICABLE FEDERAL, STATE, TRIBAL, OR LOCAL

REQUIREMENTS (4.15)

A permittee must ensure storm water control measures implemented at the site are consistent with all applicable federal, state, tribal, or local requirements for soil and erosion control and storm water management.

Instructions:

Describe applicable federal, state, tribal, or local requirements, if any.

N/A.

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 20 of 37

Control Measures Instructions:

Describe the Best Management Practices (BMPs) to be implemented to control pollutants in storm water discharges. For each major activity identified:

• Clearly describe appropriate control measures.

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

• Describe maintenance and inspection procedures to be undertaken for that specific BMP.

• Include protocols, thresholds, and schedules for cleaning, repairing, and/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 areas of BMP activity as described below:

1. Minimize disturbed area (preserve native topsoil, phase construction activities) (4.2.2)

2. Maintain natural buffer areas (4.2.3)

3. Control storm water discharges and flow rates (4.2.5)

4. Protect steep slopes (4.2.6)

5. Storm drain inlet protection measures (4.3.1)

6. Water body protection measures (4.3.2)

7. Down-slope sediment controls (4.3.3)

8. Stabilized construction vehicle access and exit points (4.3.4)

9. Dust generation and track-out from vehicles (4.3.5, 4.3.6)

10. Stockpile Management (4.3.7)

11. Authorized Non-Storm Water Discharges (4.3.8)

12. Sediment basins (4.3.9)

13. Dewatering (4.4)

14. Soil stabilization (4.5)

15. Treatment chemicals/Active treatment Systems (4.6)

16. Good housekeeping measures (4.8)

17. Any additional BMPs

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

• Any structural BMPs should have design specifications and details referred to in Tab 6.

• For more information or ideas on BMPs, see the ADEC Alaska Storm Water Guide:

http://dec.alaska.gov/water/wastewater/stormwater/guidance/

10.0 CONTROL MEASURES/BEST MANAGEMENT PRACTICES (4.0; 5.3.6)

Use this section to describe the types and locations of control measures and BMPs to be installed and maintained in accordance with Section 4.0 of the CGP.

Describe each control measure and BMP, including installation schedule and maintenance, inspection, and removal requirements. You may include a brief description of each BMP in this section and refer to detailed installation, maintenance, inspection, removal requirements, and manufacturer’s specifications to be included in this narrative (standard drawings are included in Tab 6).

If a control measure or BMP will be used to comply with more than one element of this section, you do not need to repeat the detailed installation, maintenance, inspection, removal requirements, and manufacturer’s http://dec.alaska.gov/water/wastewater/stormwater/guidance/

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 21 of 37 information. For each element, identify the control measure or BMP to be used, and refer to the section or Tab 6 where the detailed information is presented.

The person(s) identified in Section 2.0 of this SWPPP will be responsible for ensuring compliance with the installation, maintenance, inspection, and removal of these control measures.

10.1 Minimize Amount of Soil Exposed During Construction Activity (4.2.2) Instructions:

Describe the areas that will be disturbed with each phase of construction and methods (signs, fences, etc.)

you will use to protect those areas that should not be disturbed.

Describe natural features identified and how each will be protected during construction activity.

Describe how topsoil will be preserved.

• preserve existing vegetation, limit site activity and minimize soil erosion by identifying and protecting pre-existing vegetation and topsoil on the site.

• Phase construction activities to minimize the amount and duration of soil exposed to erosion. Establish final grade as soon as practicable and apply temporary or permanent soil stabilization measures. Limit the combined grubbing, grading, excavating, borrow, and fill within the construction limits to 5 acres (2.0 hectares) of exposed soil at one time.

• Construct temporary controls in incremental stages as construction proceeds

• Construct temporary slope drains, diversion channels, and earth berms to protect disturbed areas and slopes

• When a soil disturbing activity within a portion of the project is complete, apply permanent measures to the finished slopes and ditches within 14 days

• When a soil disturbing activity within a portion of the project has temporarily ceased, apply temporary measures within 14 days.

10.2 Maintain Natural Buffer Areas (4.2.3)

Are stream crossings or waters of the U.S. located within or immediately adjacent to the property? Yes No.

If YES, describe the control measures to be implemented to comply with the CGP Section 4.2.3 (e.g., buffer areas, perimeter controls, etc.)

• Vegetative buffer, areas of natural vegetation where the root mat remains in place to retain soils and prevent erosion.

• Stabilize the site as soon as possible (targeting the preparation and implementation of erosion and sediment controls to get the site to final grade, and either permanently or temporarily stabilize all bare soil areas as soon as possible).

• Perimeter controls will be installed before ground disturbing activities are initiated.

• Perimeter protection will remain in place until final stabilization has been achieved.

• Slopes and channels will be protected by conveying concentrated stormwater runoff around the top of slopes and stabilize slopes as soon as possible. Avoid disturbing natural channels and the vegetation along natural channels as much as possible.

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 22 of 37

• Divert stormwater coming on to the site by conveying it safely around, through, or under the work area.

(Divert the clean water, trap the dirty water.).

• Where the vegetative buffer is not adequate to effectively prevent sediment discharge to open water areas, streams, and Neck Lake appropriate perimeter sediment controls such as a berm, fiber roll, or silt fence must be installed.

• Protect receiving waters and other environmentally sensitive waters or areas adjacent to the site.

• Follow pollution prevention measures by providing proper containers for waste and garbage at the site.

Store hazardous materials and chemicals so that they are not exposed to stormwater.

10.3 Control Storm Water Discharges and Flow Rates (4.2.5)

Instructions:

Describe control measures to comply with the CGP (e.g., divert storm water around the site, slow down or contain storm water, use of velocity dissipation devices, installing permanent storm water management controls prior to construction of site improvements to the extent practicable, etc.).

BMP Description: Construct and maintain perimeter protection and locate erodible stockpiles away from storm drain inlets, waterways, and drainage channels.

Installation Schedule: Install measures prior to ground disturbance.

Maintenance and Inspection: Insert text here

Responsible Staff: Insert text here Repeat as needed.

10.3.1 Protect Steep Slopes (4.2.6)

Will steep slopes be present at the site during construction? Yes No.

If YES, describe control measures to be implemented to comply with CGP Section 4.2.6 (e.g., reduce continuous slope length, divert storm water around slopes, stabilized exposed areas, etc.).

BMP Description: Steep slopes are defined by the ACGP as those that are greater than 20% (1:5) for a slope length of 25 feet or more. Steep slopes may result at cut/fill embankments along the roadway and hills along the road alignment. To the extent feasible, storm water must be diverted along to the top of erodible steep slopes using perimeter control measures such as berms or fiber rolls.

Installation Schedule: Insert text here

Maintenance and Inspection: Insert text here

Responsible Staff: Insert text here Repeat as needed.

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 23 of 37

10.4 Storm Water Inlet Protection Measures (4.3.1)

Instructions:

Describe control measures (e.g., filter berms, perimeter controls, temporary diversion dikes, etc.) to be implemented to protect all inlets receiving storm water from the project during the duration of the project.

BMP Description: There are no piped storm drain systems on this project. Culvert inlets will be protected as required by the design drawings and specifications.

Installation Schedule: Insert text here

Maintenance and Inspection: Insert text here

Responsible Staff: Insert text here Repeat as needed.

10.5 Water Body Protection Measures (4.3.2)

Instructions:

Describe control measures selected to minimize discharge of sediment prior to entry into water bodies located on or immediately downstream of the site.

BMP Description: Water bodies to which the site discharges will be protected by the measures described in this SWPPP Manual. The primary measures are to retain vegetative buffers, protect and stabilize steep slopes, and protect culvert inlets/outlets. Dewatering and water diversion will be necessary during culvert installations at stream flow crossings. All discharge water must meet State of Alaska Water Quality Standards.

Installation Schedule: Insert text here

Maintenance and Inspection: Insert text here

Responsible Staff: Insert text here Repeat as needed.

10.6 Down-Slope Sediment Controls (4.3.3)

Instructions:

Describe sediment controls (e.g., silt fence or temporary diversion dike) for any portion of the down-slope perimeter where storm water will be discharged from disturbed areas of the site.

BMP Description: A fiber roll or wattle is a perimeter BMP used to prevent sediment in silt-laden sheet flow from exiting the site or entering receiving waters. They may also be used to direct clean storm water run-on away from disturbed soils to an appropriate discharge point.

Installation Schedule: Insert text here

Maintenance and Inspection: Insert text here

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 24 of 37

Repeat as needed.

10.7 Stabilized Construction Vehicle Access and Exit Points (4.3.4) Describe location(s) of vehicle entrance(s) and exit(s), procedures to remove accumulated sediment off-site (i.e., vehicle tracking), and stabilization practices (i.e., stone pads and/or wash racks) to minimize off-site vehicle tracking of sediments and discharges to storm water.

BMP Description: A vehicle tracking entrance/exit provides a stabilized pad where traffic enters or exits the construction site or where traffic transitions from non-paved to paved surfaces. Vehicle Tracking Entrance/Exit BMP is only required when traffic tracks sediment onto the existing paved roadway that cannot be adequately controlled with sweeping. Sediment must be removed from the pavement by the end of the same business day that the track-out occurs or the end of the next business day

Installation Schedule: Insert text here

Maintenance and Inspection: Insert text here

Responsible Staff: Insert text here Repeat as needed.

10.8 Dust Generation and Track-Out from Vehicles (4.3.5 and 4.3.6) Describe control measures to minimize the generation of dust and off-site vehicle tracking of sediment.

BMP Description: Dust will be controlled by minimizing traffic speed and by sprinkling with a water truck to increase soil moisture levels and thereby reduce dust.

Installation Schedule: Insert text here

Maintenance and Inspection: Insert text here

Responsible Staff: Insert text here Repeat as needed.

10.9 Soil Management (4.3.7)

Will soil stockpiles be at the site during construction? Yes No.

If YES, describe control measures intended to control sediment loss from the stockpiles (e.g., tarps or perimeter straw wattles). Show location(s) of stockpile(s) on site maps.

BMP Description: Soil stockpiles that will remain in place for longer than 14 days without further disturbance (adding to, taking from, or grading) must be covered or stabilized.

Installation Schedule: Insert text here

Maintenance and Inspection: Insert text here

PROJECT NAME Neck Lake Road Reconstruction: NPOWI Hwy, to Marine Access Facility Jct. DATE: 12/9/2022

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (AK PFH 58(1)-swppp-narrative.docx) Page 25 of 37

10.10 Authorized Non-Storm Water Discharges (4.3.8)

• Describe any measures taken to minimize any non-storm water authorized by this permit.

• Discharges from fire-fighting activity will only occur if necessary to protect property and human life.

Where discharge of chemicals or soil erosion/sedimentation occur due to these activities, the area will be cleaned up according to the HMCP in Appendix 0. Areas of erosion (rills and gullies) will be repaired, excessive sediment will be removed from installed BMPs or where it is deposited near storm water conveyances, water bodies, or along the project work boundary, and any damaged BMPs will be repaired or replaced as necessary.

• Water line/fire hydrant flushing is not planned for this project.

• Waters used to wash vehicles/equipment are not allowed on the roadway project site but may occur at the material/staging sites. Washing areas will be low areas or encompassed by perimeter control. Where hazardous substances may wash off, a liner or containment will be placed under the equipment to capture all wash waters. Detergents and cleaning solutions may only be used where effective containment is installed.

• Dust Control watering (if required) will be minimized to that necessary to control dust. Dust Control watering/sprinkling equipment and rate of flow will be adjusted to ensure the application does not result in runoff, washout, or mud formation on driving surfaces.

10.11 Sediment Basins (4.3.9)

Refer to CGP Section 4.3.9 to determine if a sediment basin is required for your site.

Will a sediment basin be required during construction? Yes, No.

If YES, provide a brief description of the sediment basin here. Append detailed design information in Tab 6 (e.g., calculated volume of runoff from a two-year, 24-hour storm, or other assumptions used to calculate appropriate sediment-basin size). Show location of sediment basin(s) on site maps.

There are no project areas where a common drainage location that serves an area with 10 or more acres disturbed at one time will occur.

10.12 Dewatering (4.4)

Describe dewatering practices to be implemented if water must be removed from an area so construction activity can continue.

Will dewatering be conducted during construction? Yes, No.

Dewatering may be necessary for deep excavation such at culvert installations. If performed, all discharge water must be controlled so that it meets Alaska Water Quality Standards.

Will excavation dewatering be conducted within 1,500 feet of a DEC mapped contaminated site found on the following website? Yes, No.http://www.arcgis.com/home/item.html?id=315240bfbaf84aa0b8272ad1cef3cad3

If yes to above question, review and comply with the DEC Excavation Dewatering General Permit (AKG002000 http://dec.alaska.gov/water/wastewater/stormwater/dewater-hydrostatic/#dewater) or most current version, for…