Complete SWPPP Canyon to Tower,Phase 3-WYNPS YELL10(22).pdf

Stormwater Pollution Prevention Plan

SWPPP

For:

Canyon to Tower, Phase 3 - WY NPS YELL 10(22) Park County, Wyoming

Federal Highway Administration, Western Federal Lands Highway Division

Project Engineer: __________ _

General Contractor: ----------n-;

0 Q) ::J 0-lti' CD ::J 0 i;:--

Table of Contents

. SWP.PP/ESCP TABS

TAB 1: SWPPP/ESCP Narrative

TAB 2: NPDES Permit (Construction General Permit or Corresponding State Permit)

TAB 3: NOi, EPA/State Acknowledgement, Other Applicable EPA/State Correspondence

TAB 4: Delegation of Authority

TAB 5: Maps

TAB 6: Erosion/Sediment Control Plan Sheets (plan set and BMP typical details)

TAB 7: Permanent Stabilization and Revegetation Plan(plan sets and details)

TAB 8: SWPPP Amendment Log

TAB 9: Erosion/Sediment Control Inspection Reports and Requirements

TAB 10: Corrective Action Log

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

TAB 12: Training Log

TAB 13: Waste and/or Borrow Site Information

TAB 14: Grading and Stabilization .Log

TAB 15: Hazardous Spill Plan

TAB 16: Other Applicable Permits(§ 404, § 401, Oregon Remove-Fill Permit)

TAB 17: NPDES Quality Assurance Checklist

TAB 18: NPDES Notice of Termination (NOT)

TAB 1:

SWPPP (ESCP- Oregon) NARRATIVE

,.t- ,:1· ~ '..,,_....., Tab 1

CONTRACTOR:

Complete SWPPP narrative in accordance with contract 107.0lA(b).

Revise SWPPP narrative as needed throughout construction in accordance with contract 107.0lA(f)

ALASKA, IDAHO AND WASHINGTON PROJECTS ONLY:

SWPPP narrative must be signed by General Contractor's responsible corporate officer as defined in CGP 1.11.2.

File approved SWPPP narrative i~ Tab 1.

STORM WATER POLLUTION-PREVENTION PLAN TEMPLATE

PLEASE READ THIS PRIOR TO COMPLETING FORM: This SWPPP template is intended to help operators in developing a SWPPPP that complies with Part 8.2 of the Wyoming Department of Environmental Quality WYPDES Storm Water Program Large Construction General Permit. The SWPPP is a site specific, dynamic plan designed to control erosion and sedimentation, prevent storm water contamination, and comply with requirements of the Clean Water Act. It is the permittee's responsibility to ensure all required items in the Large Construction General Permit are adequately addressed, and that the SWPPP is developed, implemented, and maintained.

Project or Site Information:

Project/Site Name:

Canyon to Tower, Phase 3

Proiectlocation as either Quarter/Quarter. Section. Townshio. Ranee.OR Street Address and .Citv:

Yellowstone National Park - Chittendon Rd parking area to Tower Fall parking area. No address available.

Permittee (Owner/Operator) Information:

Owner or Ope·rator Name: Federal Highway Administration - Western Federal Lands Highway Division

Mailing Address: 610 E Fifth St

City, State, ZIP Code: Vancouver, WA 98661

Phone Number: 360-619-7700 j Permit Number: WYRlO

Part 8.2.1 SWPPP - Administrator:

Company or Organization:

Name:

Title:

Phone#:

Email:

Part 8.·2.2 - Site Description:

8.2.2.1

TBD - Construction contractor

Brief descriotion of nature of the construction activitv:

RECONSTRUCT 8.7 MILES OF ROAD FROM CHITTENDEN ROAD TO TOWER JCT. to a 24 foot top width.

Improve/mitigate parking and traffic problems at the Chittenden road area and parking, the Buffalo Paddock viewing & picnic area, Tower Fall parking area, campground entrance roads and other pullouts along this roadway.

8.2.2.2 Proposed seauence of maior activities and an estimated date final stabilization is expected to be achieved.

Clearing, grubbing, cut and fills, build road grade, pave. Work on parking areas throughout the project. It is expected that the contractor will move around the project, rather than working linearly north to south or vice versa. Final stabilization expected October 1, 2024.

8.2.2.3 Estimate of total area of the site: 53 acres

and Estimate of total area of the site expected to undergo disturbance related to the construction activity including clearing, excavation, and grading as well as offsite borrow areas, access roads, areas for support activities and staging/storage areas. 49.5 acres

8.2.2.4 A description of storm water discharges from support activities dedicated to the construction site including, but not limited to, off-site materials borrow areas, concrete or asphalt batch plants, equipment staging yards, material storage areas and access roads constructed for the Proiect.

Potential stormwater discharges from support activities should be limited to the following areas:

Existing turnouts and parking areas within and immediately adjacent to the areas of reconstruction.

Buffalo Paddock area may be used for temporary materials stockpiling and equipment staging. The Frog Rock Pit area will be used for temporary materials stockpiling, equipment staging, an asphalt batch plant, and wasting of unsuitable excavation material within an existing depression at the site.

8.2.2.5 Brief description of existing vegetation at the site and an estimate of the percent of vegetative ground cover.

(Pre-disturbance photos are helpful.}:

Vegetation in the area is dominated by ponderosa pine with some quaking aspens and grasses in places. Vegetative ground cover varies through the area as much of the area consists of existing roadways, rock slopes and stone masonry walls.

8.2.2.6

List the location and description of any other potential pollution sources including, but not limited to vehicle fueling, eauioment maintenance. fertilizer storage, chemicals. or Paint:

Potential pollution sources would be limited to the project site, existing pullouts along the project, and the staging and stockpile sites listed above under 8.2.2.4. Fuel storage would be limited to the Buffalo Paddock and the Frog Rock areas.

8.2.2.7a Name of the drainage or water body (surface water(s) of the state) that may receive a storm water discharge from the construction activity and the size, type, and location of any outfall. Note: Where discharges are to unnamed drainages, provide the name of the first named drainage that will receive that discharge if the first named drainage is within 1000 feet of the discharge:

Antelope Creek

8.2.2.7b If the storm water discharge is to a separate storm sewer, indicate the name of the municipal owner of that system, the location of the storm sewer outfall, and the name of the drainage or water body that will receive the storm water discharges from the municioal outfall:

N/A

8.2.2.8 Identify any water body listed as impaired under section 303(d) of the federal Clean Water Act due.to sediment, suspended solids or turbidity or that has an approved TMDl for sediment, suspended solids or turbidity that is within 2000 feet of, and may receive storm water flow from the permitted construction activity. The state's most recent 303(d) list can be found in the current Integrated 30S(b) and 303(d) Report. The report can be found on the WDEQ Water Quality Division Watershed Management website under Water Quality Assessment at:

http://deg.wyoming.gov/wgd/water-guality-assessment/resources/reports/. Approved TMDls can be found on another webpage at http://deg.wyoming.gov/wgd/tmdl/resources/completed-projects/ Name of impaired water body: N/A

Part 8;2.3 -Site Maps.

One (or more) map(s) should be prepared that provide, at a minimum, the following information. The map(s) should be prepared so that all of the required information is clearly displayed and it is clear what BMPs will be installed in each major stage of construction, in~luding the time between the cessation of active construction and final stabilization. Provide multiple maps as necessary to clearly describe BMP timing and placement. The scale of the map(s) must be sufficient to identify the location of all the items listed below:

8.2.3.1 Construction site boundaries.

8.2.3.2 8.2.3.3

8.2.3.4 8.2.3.5

8.2.3.6

8.2.3.7

8.2.3.8

8.2.3.9

All areas of soil disturbance and areas that are to remain undisturbed.

The location of surface waters of the state as defined in Part 2.19 of the large Construction General Permit (lCGP).

Areas used for storage of building materials, soils, wastes, fuel, and concrete washout.

locations of all existing or planned temporary or permanent erosion and sedimentation controls.

locations of all other structural and non-structural best management practices for pollutants other than sediment, including but not limited to, fueling/maintenance areas and concrete washout disposal areas. · Site topograph_y or storm water drainage patterns including lines showing boundaries between different drainage areas in the project area(s);

Areas where dedicated support activities {e.g. operations producing earthen materials such as sand and gravel, staging areas, portable asphalt or concrete batch plants) occur and are to be covered under the same general permit authorization as the construction activity: See Part 1.2.2 of the lCGP for more information on what can be covered under an authorization. Activities covered under another WYPDES storm water authorization (such as a mineral mine with separate coverage) do not need to be included.

Storm water discharge locations. Include discharge locations for offsite operations covered under this permit. Also include storm drain inlets where storm water entering the storm drain system may leave the construction site and any points where storm water will discharge directly to a surface water of the state within the construction site.

8.2.3.10 Also note all locations where storm water will run on to the construction site from areas outside the site boundaries.

8.2.3.11 North Arrow. Include a legend where needed for clarity.

Part 8.2.4 - Best Management Practices (BMPs) Please note: Storm water structural best management practices are expected to withstand and function properly during precipitation events up to a 2-year, 24-hour storm event. Visible and measurable erosion (see Part 7.4 of the LCGP) that leaves the construction site from such storm events should be minimal. The 2-year, 24-hour storm event in Wyoming ranges from 0.8 to 2.6 inches. An isopluvial map of the 2-year, 24-hour storm depth (for your location) is available on the DEQ storm water website. Permittees may substitute equivalent data published by the local municipality or regulatory agency.

8.2.4.1 Erosion and sediment controls.

8.2.4.la Erosion prevention BMPs. Clearly describe in detail the storm water erosion control BMPs that will be used for erosion control during construction related earthwork activities. Indicate the location of these measures on the site map required above, or a similar separate map. Examples of BMPs for erosion prevention include, but are not limited to preserving existing vegetation, scheduling (e.g., minimizing site disturbance at a given time), surface roughening, permanent or temporary seeding and planting, mulches, soil binders or tackifiers, erosion control blankets and mats, wind erosion control, storm water diversion practices upslope of a construction site, pipe slope drains, and outlet protection.

Erosion prevention BMPs narrative:

Construction limits were minimized through the design process to minimize disturbance to existing vegetation and resources. Erosion prevention BMPs include surface roughening, application of mulch and possibly tackifiers to finished slopes and temporary slopes and stockpiles, and outlet protection through the installation of paved waterways and energy dissipators.

8.2.4.lb Sedimentation Control BMPs. Clearly describe in detail the storm water sedimentation control BMPs that will be used for sediment control during construction related earthwork activities. Indicate the lqcation of these measures on the site map required above, or a similar separate map. Examples of BMPs for sedimentation control include, but are not limited to sediment barriers such as straw bales, gravel berms, silt fences, fiber rolls, wattles, storm drain inlet protection, entrance/exit tracking controls, undercut lots where curb and gutter are installed, vegetated buffer strips, grassed waterways, water bars, and water wings.

Sedimentation Control BMPs narrative:

Sediment controls to be applied to the project include the installation of silt fence and fiber rolls at selected locations along the project. Vegetated buffer strips will be utilized where existing vegetation is adequate. Sandbags would be utilized to isolate in-water work areas if drainages at culvert replacements carry water at the time of construction.

8.2.4.lc Stabilization Measures. Describe temporary and permanent stabilization measures such as the BMPs listed in the previous Erosion Prevention BMPs and Sediment Control sections for exposed soil areas where activities have permanently or temporarily ceased. Refer to Part 7.15 for additional information on stabilization requirements and timing. Please note: temporary or permanent stabilization measures are required in areas where further work is not ·expected for 14 days or more Temoorarv stab_ilization narrative:

All slopes will be stabilized with surface roughening, mulching, and possibly tackifiers. The National Park Service will perform seeding and plantings for the entire project after slopes have been constructed and temporarily _stabilized.

8.2.4.2 Construction Site Dewatering. Clea_rly describe the specific BMPs that will be used for discharges from construction site dewatering. Discharges must meet the conditions specified in Part 7.14 of the LCGP including the use of settling or filtration techniques as appropriate and the use of velocity dissipation devices at the outlet.

Construction Site Dewatering narrative:

No dewatering sites meeting the conditions of Part 7 .13 are anticipated.

8.2.4.3 Operational Controls.

8.2.4.3a Good Housekeeping BMPs. Describe in detail the good housekeeping BMPs that will be implemented to maintain a clean and orderly facility. At a minimum, this plan shall address litter, debris, chemicals, fertilizers and sanitary waste. Include measures to remove sediment that has left the site:

Good Housekeeping narrative:

Trash must be disposed of in proper bear-p_roof containers. Yellowstone National Park staff closely monitor to ensure the proper disposal of trash to ensure there are no wildlife concerns. The contractor will be required to submit a Hazardous Spill Plan (an SPCC plan will be required if necessary) detailing the BMPs that will be in place to prevent mishandling of materials and the procedures that will be in place to respond to any spills.

8.2.4.3b

Bulk Storage of Petroleum Products. Describe in detail the specific practices for bulk storage of petroleum . products at.the site. (See Part 8.2.4.3.b of the LCGP for more information). An SPCC plan may also be referenced.

Bulk Storage of Petroleum Products narrative:

A SPCC plan will be required to be completed by the contractor if necessary. If an SPCC is not required, the contractor will be required to submit a Hazardous Spill Plan detailing the BMPs that will be in place to prevent mishandling of materials and the procedures that will be in place to respond to any spills. Additional requirements are included in Section 107 of the attached draft Special Contract Requirements.

8.2.4.3c and d

Concrete Waste. Clearly describe the specific practices that will be used to contain concrete wash waters, grindings or slurry from entering storm drains or surface waters of the state. Please note: Concrete grindings must be disposed of in accordance with the regulations and policies of the WDEQ Solid and Hazardous Waste Division. Include portable concrete batch plants and asphalt batch plants covered under this permit.

Concrete Waste narrative:

Conc.rete washout would be limited to the Frog Rock pit area.

8.2.4.3e Employee Training. Describe employee training that will be provided to inform personnel of their responsibility in implementing the practices and controls included in the SWPPP. · Emolovee Training narrative:

WFLHD construction staff attend annual training that covers the responsibilities of the NPDES and best practices for construction sites. All WFLHD Project Engineers are Certified Erosion and Sediment Control Leads.

8.2.S Maintenance Maintenance Schedule. Describe the schedule, intervals, or conditions upon which BMPs described in the SWPPP will be maintained. Please note: BMPs found to be in need of repair or maintenance shall be repaired or maintained in accordance with Appendix C, Part 2 of the LCGP. Repair and maintenance activities shall be documented and maintained in accordance with Part 9.7.

Maintenance Schedule narrative:

In accordance with the contract requirements, erosion and sediment control measures must be maintained in working condition until the project is complete or the measures are no longer needed as the site is stabilized.

Erosion and sediment control measures must be cleaned of collected sediment when half full. Erosion and sediment control measures that cannot be maintained or that are damaged by construction operations must be replaced.

8.2.6 Inspections

Inspection Schedule. Describe in detail an inspection program and schedule that meets the requirements of Part 9 of the LCGP.

lnsoection Schedule narrative:

Per the contract for the project, the inspection requirements will be slightly more stringent than the LCGP. The contractor must inspect all facilities, and furnish inspection reports within 24 hours, at least every 7 days, within 24 hours after more than 3/8 inch of rain in a 24 hour period, and as required by the contract permits.

8.2.7 Certification

Authorized signatories for this SWPPP are the following:

For Corporations: A principal executive officer of at least the level of vice president or the manager of the site for which this SWPPP is being implemented who has day to day management control and decision making authority.

For partnerships: A general partner.

For a sole proprietorship: The proprietor For a municipal, state, federal or other public facility: Either a principal executive officer or ranking elected official.

I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate 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, includin& the possibility of fine and imprisonment for knowing violations. In addition, I certify that I am aware of the terms and conditions of the large construction general permit and I agree to comply with those requirements.

Scott Smithline Environmental Manager

Printed Name of Person Signing Title

"1/Z-7/t9 360-619-7785

Date Telephone

Reset Form c:\bsahl\storm_water\construction\cgp_2016\swppp_template_2016_rev.doc ·

Please Insert SECTION I of tl1e SCRs , N

TAB 2: NPDES Permit

NPDES Construction General Permit or corresponding State Permit

Matthew H. Mead, Governor

Department of Environmental Quality

To protect, conserve, and enhance the Quality of Wyoming's environment for the benefit of current and future generations

Large Construction General Permit to Discharge Storm Water Associated with Large Construction Activity

Under the

Wyoming Pollutant Discharge Elimination System (WYP.DES)

Todd Parfitt, Director

In compliance with the provisions of Chapter 2 of the Wyoming Water Quality Rules and Regulations, the federal Water Pollution Control Act and the Wyoming Environmental Quality Act, facilities located within the State of Wyoming (except areas within the Wind River Indian Reservation where the state does not have jurisdiction) which are or may discharge storm water associated with large construction activities, are hereby authorized to discharge to surface waters of the State of Wyoming upon compliance with the requirements of this permit.

This general WYPDES permit WYRl0-0000 is issued under the provisions of Wyoming Water Quality Rules and Regulations Chapter 2.

This permit shall become effective when signed and expire on February 1, 2020.

Discharges are authorized under this permit only after submission of a Notice of Intent to, and receipt of a Letter of Authorization, from the Department of Environmental Quality/Water Quality Division. See Part 3 of the permit for additional information.

Kevin Frederick

Administrator - Water Quality Division

· Todd Parfitt /_~ /

Director - D,partment of Environmental Quality

Af)r,I z.z..

Date {,f Issuance

200 West 17th Street · Cheyenne, WY 82002 · http://deq.wyoming.gov · Fax (307)635-1784

ADMIN?OUTREACH ABANDONED MINES AIR QUALITY INDUSTRIAL SITING LAND QUALITY SOLID & HAZ. WASTE WATER QUALITY

(307) 777-7937 (307) 777-6145 (307) 777-7391 (307) 777-7'369 (307) 777-7756 (307) 777-7752 (307) 777-7781

This page is intentionally left blank.

ii

TABLE OF CONTENTS

Preamble ............................................................................................................................................ vi

Part 1 Coverage Under This Permit

1.1 Permit area ......................................................................................................................... :1

1.2 Storm water discharges covered under this permit

1.3 Storm water discharges not covered under this permit

Part 2 Definitions

Part 3 Notice of Intent (NOi)- Obtaining an Authorization to discharge

3.1 Who must apply

3.2 Deadline to apply

3.3 Processing of NOls ................................ ,

3.4 Expedited processing

3.5 Form of NOi submission

3.6 NOi contents

3.7 Application package for a new project without previous coverage

3.8 Renewing an existing authorization to discharge ('early expiration')

3.9 Continuation of coverage under a renewed master general permit

3.10 Agreement to comply

3.11 Projects that may discharge to class 1 waters

3.12 Denial of coverage

3.13 Individual permit required

3.14 Temporary coverage

Part 4 Notice of Transfer and Acceptance (NOTA)

Part 5 Notice of Termination (NOT)

Part 6 Fees

Part 7 Effluent Limits

7.1 Quality of discharge ................................................................................ :

7.2 Best management practice selection, installation and maintenance

7.3 Erosion and sediment controls

7.4 Visible or measurable erosion

7.5 Consistency with a Total Maximum Daily Load

7.6 Recovery of offsite sediment ........................................................................................ _

7.7 Inlet protection

7.8 · Off-site tracking of sediment

7.9 Use of sediment ponds or basins

7.10 Design of sediment ponds

7.11 Design of sediment basins .................................................................. ,

7.12 Discharge from ponds or basins

iii

7.13 Maintenance of ponds or basins ............. :

7.14 Construction site dewatering

7.15 Soil stabilization .................................................................. :

7.16 Pollution prevention measures

7.17 Minimum storm size for BMPs ....................................................................................... .-.. 17

7.18 Allowable discharges ......... : ....................................................................... :

7.19 Prohibited discharges

7.20 Sanitary facilities .......................................................................................... :

7.21 Construction project identification

7.22 Requirements of other agencies

Part 8 Storm Water Pollution Prevention Plan

8.1 General requirements

8.1.1 ScopeofSWPPP

8.1.2 Joint SWPPPs

8.1.3 Pollutant source identification

8.1.4 Plan implementation

8.1.5 Plan amendment ..................................................................... .-

8.1.6 Plan retention

8.1.7 Plan availability ................................................................................................. , ... 20

8.1.8 Guidance

8.2 Content

8.2.1 SWPPP administrator

8.2.2 Site description - narrative

8.2.3 Site maps

8.2.4 Best management practices (BMPs)

8.2.5 Maintenance

8.2.6 Inspections

8.2.7 Signature

Part 9 Self Monitoring and Inspection Requirements

9.1 Site inspections

9.2 Inspection schedules

9.3 Scope of inspections

9.4 Qualified person···········································:···································································· 26

9.5 Alternative inspection plans and schedules .................................................... ,

9.6 Areas that meet final stabilization

9.7 Records

9.8 Sever weather exception

9.9 Winter conditions

9.10 Retention of reports

9.11 Collection and submission of self-monitoring information

Part lOStandard Permit Conditions

10.1 Duty to comply ....................................... ." ..................................... _

10.2 Penalties for violations of permit conditions

10.3 Need to halt or reduce activity not a pefense

iv

10.4 Duty to mitigate

.10.5 Duty to provide information

10.6 Other information .................................................................................................. :

10.7 Signatory requirements ..... ·····························································································:·· 28

10.8 Penalties for falsification of reports and monitoring systems

10.9 Oil and hazardous substance liability

10.10 Property rights

10.11 Severability ....................................................... ,

10.12 Transfers

10.13 State laws

10.14 Facilities operation and maintenance

10.15 Monitoring and records

10.16 Availability of reports .......•........................................................... .'

10.17 Adverse impact

10.18 Bypass or upset of treatment facilities

10.19 Upset conditions

10.20 Inspection and entry

10.21 Permit actions

10.22 Reopener clause······························································································.·······

10.23 Civil and criminal liability

Appendix A Appendix B AppendixC

Class 1 Waters Acronyms Used in this Document Pollution Control Guidelines

V

Preamble

The purpose of this Preamble is to provide the construction project "operator" (permittee) who submits an application package for coverage under the Large Construction General Permit (LCGP) to Discharge Storm Water Associated with Large Construction Activity with a summary of the requirements of this permit.

The basic principle of the permit is to identify pollutant sources associated with construction activities and install and maintain Best Management Practices (BMPs) to reduce the potential discharge of pollutants from the construction project. The degree of pollution control necessary will vary depending on the site and the associated construction activity, but the BMPs and pollution control measures must collectively prevent exceedances of applicable water quality standards in Surface Waters of the State.

Other potential pollutants likely to be a problem at sites are fuels, lubricating oils, construction materials, various wastes, fertilizers, or pesticides. Proper management of these materials is essential to ensure potential pollutants are not discharged from the construction activity to Surface Waters of the State.

In order to achieve compliance with the conditions of this permit, the permittee is required to address the effluent limitations in Part 7 by developing a Storm Water Pollution Prevention Plan (SWPPP) as described in Part 8 and by applying at least the minimum management requirements found in Appendix C. The SWPPP must clearly address the effluent limitations and the selected BMPs to be used to manage pollutant sources and ensure appropriate protection of state surface waters.

The permit requires that the entire site achieve a "finally stabilized" condition before permit coverage may be terminated or allowed to expire. In Wyoming's largely semi-arid climate, the time necessary to achieve a "finally stabilized" condition often requires permit coverage well beyond the end of the conventional earthwork and facility construction phase to ensure vegetation or other site stabilization measures are in place.

vi

Large Construction General Permit

WYR10-0000

This permit is effective only with separate written authorization

Part 1 Coverage Under This Permit

1.1 Permit area. The permit covers all areas within the State of Wyoming except areas within the Wind River Indian Reservation where the State does not have jurisdiction.

1.2 Storm water discharges covered under this permit

1.2.1 Storm water discharges associated with new and existing large construction activities.

1.2.2 Storm water discharges from areas that are dedicated to support activities (e.g., operations producing earthen materials, such as sand and gravel, staging areas, portable asphalt or concrete batch plants) for use at a single large construction activity may be covered under this permit provided:

1.2.2.1 The support activity is not an on-going operation serving multiple, unrelated construction projects and does not operate beyond the completion of the construction activity.

1.2.2.2 Appropriate best management practices are identified in the storm water pollution prevention plan for discharges from the support activity.

1.2.3 Discharges from dewatering of collected storm water and minor amounts of ground water from excavations and depressions on a permitted site provided that requirements specified in Part 7.14 are followed and necessary best management practices (BMPs) are installed and effective.

1.2.4 Storm water discharges from "large construction activities" receive coverage under this permit when the Administrator or his agent provides a written authorization to the applicant that the Notice of/ntent has been accepted and the permitted activity is covered under the general permit.

1.2.5 This permit does not preempt or supersede the authority of local agencies to prohibit, restrict, or control discharges of storm water to storm drain systems or other water courses in their jurisdiction.

1.3 Storm water discharges not covered under this permit. The following storm water discharges are not provided coverage under this permit:

1.3.1 Storm water discharges from large construction activities with individual WYPDES permits that include storm water control requirements.

1.3.2 Storm water discharges from large construction activities covered under another industry- or geographi.cally-specific general WYPDES permit.

1.3.3 Storm water discharges that are commingled with wastewaters (including significant ground water).

Page -1

This permit is effective only with separate written authorization

1.3.4 The placement of fill into waters of the state requiring local, state or federal authorizations (such as a federal Section 404 permit from the US Army Corps of Engineers).

1.3.5 This permit does not substitute for obligations under the National Environmental Policy Act (NEPA), Endangered Species Act (ESA), Wild and Scenic Rivers Act, or National Historic Preservation Act (NHPA). It is your responsibility to ensure that the project and resulting discharges comply with the respective requirements of these statutes.

1.3.6 Post-construction discharges from industrial activity that originate from the site after construction activities have been completed at the site. Post-construction industrial storm water discharges may need to be covered by a separate storm water permit.

1.3.7 Discharges to waters for which there is a total maximum daily load (TMDL) allocation for sediment, suspended solids or turbidity are not covered unless the applicant develops a SWPPP that is consistent with the assumptions, allocations and requirements in the approved TMDL. Information about TMDL allocations may be found at the following website: http://deq.wyoming.gov/wqd/water-quality-assessment/.

. 1.3.8 Storm water discharges that the Department determines will cause, or have the reasonable potential to cause or contribute to, violations of water quality standards or impairments of water quality.

Part 2 Definitions

2.1 "Access Roads" means private roads which are exclusively or primarily dedicated for use by the permittee.

2.2 "Administrator" means the Administrator of the Water Quality Division, Wyoming Department of Environmental Quality or his agent.

2.3 "Best Management Practices" ("BMPs") means schedules of activities, prohibitions of practices, maintenance procedures, and/or other management practices to prevent or reduce the pollution of waters of the state. BMPs also include treatment requirements, operating procedures, and practices to control plant site runoff, spillage or leaks, sludge or waste disposal, or drainage from raw material storage.

2.4 "Common Plan of Development or Sale" means projects that may occur in multiple locations and/or in multiple phases, but are part of a single, overall plan. Documentation of common plans may include announcements or other documentation (including signs, public notices, hearings, marketing information, drawings, financing records, permit applications, zoning request, maps, etc.)

or physical demarcations (including boundary signs, lot stakes, suryeyor markings, etc.) indicating that construction activity will or may occur in the area.

Page - 2

WYR1.0-0000

This permit is effective only with separate written.authorization

2.5 "CWA" means Clean Water Act or the federal Water Pollution Control Act, 33 USC 1251, et. seq.

2.6 "Department" means the Wyoming Department of Environmental Quality

2. 7 "Energy Dissipation" means methods employed at pipe outlets to prevent erosion by dissipating or lowering the energy of the discharge. Examples include, but are not limited to, concrete aprons, riprap, splash pads, and gabions which are designed and installed to prevent erosion.

2.8 "Finally Stabilized" means that all soil disturbing activities at the site have been completed, and a uniform perennial vegetative cover with a density of 70% of the typical or native background vegetative cover for the area has been established on all disturbed unpaved areas and areas not covered by permanent structures. Final stabilization using vegetation must be accomplished using plants or seed mixtures of forbs, grasses and/or woody vegetation that are adapted to the conditions of the site.

2.9 "Large Construction Activity" means any clearing, grading, or excavation project which will disturb five or more (not necessarily contiguous) surface acres. Large construction activity also includes the disturbance of less than five acres of total land area when that disturbance is part of a larger common plan of development or sale if the larger common plan will ultimately disturb five acres or more. Construction activity does not include routine maintenance that is performed to maintain the original line and grade, hydraulic capacity or original purpose of a facility.

2.10 "nForm" means an electronic Notice of Intent (NOi) that can be used to apply for coverage under most WYPDES general permits. Users must set up accounts with "egov" and "ENVITE" prior to editing or submitting an online NOi. Go to http://deg.wyoming.gov/wgd/nform/ for further information. Use of nForm is not a requirement.

2._p "Operator'' is the company, individual or organization that has day-to-day supervision and control of activities occurring at the construction site and/or the ability to modify project plans and specifications related to the SWPPP. This can be the owner, developer, the general contractor, or, in some cases, the agent of one of these parties. The operator is responsible for ensuring compliance with all conditions of the permit. The operator shall be knowledgeable in all areas necessary to comply with this permit.

2.12 "Reportable Quantity" means any spill or release of oil and hazardous substances which enters any water of the state, or releases that are determined to be a threat to enter waters of the state and are a) considered a "hazardous substance," orb) any amount greater than either 10 barrels of any combination of crude oil/petroleum condensate/produced water or 25 gallons of refined crude oil products. Notice of spills meeting this definition should be made to the WDEQ at 307-777-7781.

This number is available for reporting 24 hours a day. An online reporting form is also available at http://deg.wyoming.gov/admin/spills-and-emergency-response/. Refer to this website or Chapter 4 of the WWQRR for more information.

Page - 3

This permit is effective only with separate written authorization

2.13 "Section 303(d) List or 303(d) List" means a list of Wyoming's water quality-limited surface waters requiring the development of Total Maximum Daily Loads (TMDLs) to comply with Section 303(d) of the federal Clean Water Act. A copy of the current Integrated 305(b) and 303(d) Report is available on the WQD website at http://deq.wyoming.gov/wqd/water-guality-assessment/. A link to a map of 303(d) listed waters, waters with approved TMDLs and class 1 waters is available on the WDEQ storm water webpage.

2.14 "Severe Property Damage" means substantial physical damage to property, damage to treatment facilities which causes them to become inoperable, or substantial and permanent loss of natural resources which can reasonably be expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by delays in production.

2.15 "Spill Prevention Control and Countermeasure Plan (SPCC)" is a federal requirement (40CFR112) for facilities that store specific amounts of petroleum products. The plan is not a state requirement, but may be referenced as part of the SWPPP when appropriate.

2.16 "Storm Water" means storm water runoff, snow melt runoff, and surface runoff and drainage.

2.17 "Storm Water Associated with Large Construction Activity" means the discharge of storm water from construction activities, including clearing, grading, and excavating, that result in land disturbance of five or more acres of total land area. Large construction area also includes the disturbance of less than five acres of total land area that is a part of a larger common plan of development or sale if the larger plan will ultimately disturb five acres or more.

2.18 "Storm water Associated with Industrial Activity" means storm water discharges from any of the activities defined in Section 6 (g) (ii) of Chapter 2 of the Wyoming Water Quality Rules and Regulations.

2.19 "Surface Waters of the State" means all perennial, intermittent and ephemeral defined drainages, lakes, reservoirs, and wetlands which are not man-made retention ponds used for the treatment of municipal, agricultural or industrial waste; and all other bodies of surface water, either public or private which are wholly or partially within the boundaries of the State.

2.20 "SWPPP" means Storm Water Pollution Prevention Plan.

2.21 "Temporary Stabilization" means the exposed ground surface has been covered with appropriate materials to provide temporary stabilization of the surface from water or wind erosion. Materials include, but are not limited to, mulch, riprap, erosion control mats or blankets and temporary cover crops. Surface roughening may also be considered a temporary stabilization method. Seeding alone is not considered stabilization. Temporary stabilization is not a substitute for the more permanent "final stabilization."

2.22 "Total Maximum Daily Load {TMDL)" means the maximum amount of a specific pollutant that can be assimilated by a surface water without causing an impairment of designated uses or violating

Page - 4

This permit is effective only with separate written authorization water quality standards. The allowable amount takes into account all sources of that pollutant in a watershed, including point sources and non-point sources, and requires a portion to be set aside as a margin of safety.

2.23 "Wyoming Surface Water Quality Standards" refers to Wyoming Water Quality Rules and Regulations, Chapter 1 (surface water standards}.

2.24 "Wyoming Pollutant Discharge Elimination System (WYPDES)" means the state program for issuing, modifying and reissuing, terminating, monitoring and enforcing permits for discharging pollutants into surface waters of the state under the provisions of the Wyoming Water Quality Rules and Regulations, Chapter 2; W.S. 35-11-101 through 35-11-1803 and the federal Clean Water Act.

Part 3 Notice of Intent (NOi) - Obtaining an Authorization to Discharge

3.1

3.2

3.3

Who must apply. Operators of any large construction activity as defined in Part 2.9. Failure to obtain appropriate coverage may result in an enforcement action.

Deadline to apply. Except as authorized in Part 3.4 of this permit, an operator seeking authorization under this permit shall submit a complete Application Package to the Department at least 30 days· prior to commencing construction activities. The NOi may be found on the program website at http:// deg. wyom i ng.gov /wqd/ storm-water-permitting/ resources/ construction-genera I-perm its/ or by calling the Division at 307-777-7781. Contents of the "application package" will vary based on the reason for the submission. See below for more information.

Processing of NOls.

3.3.1 Upon successful review by WDEQ staff, the applicant will be issued a Letter of Authorization

(LOA} which authorizes the discharge of regulated storm water under the terms of this permit. Issuance of an LOA for a construction activity does not imply that the WDEQ has "approved" the applicant's SWPPP. It is the responsibility of the permittee to ensure the effectiveness of their SWPPP through the appropriate BMP selection, design, inspection, and maintenance.

3.3.2 NOls that are incomplete will not be processed and will be returned. If an incomplete SWPPP is submitted, both the NOi and SWPPP will be returned and the NOi will not be processed.

3.4 Expedited processing. With just cause, and at the request of the operator, the Administrator may:

3.4.1 Allow the operator of a new large construction activity to submit a complete application package to the Administrator no later than 10 days prior to commencing construction activities; and

3.4.2 Notify the applicant of the approval or disapproval of coverage under this permit within 10 days of receipt of the NOi.

3A.3 Application packages where the attached SWPPP contains designs for sediment ponds or basins (as discussed in Part 7) are not eligible for expedited processing.

3.4.4 A written request of expedited processing must accompany the NOi.

Page - 5

WfR10-0000

This permit is effective only with separate written authorization

3.5 Form of NOi submission.

3.6

3.5.1 Paper or hard copy NOls inust be mailed or hand delivered to the WDEQ. NOls must have an original signature to be valid.

3.5.2 Online submission for Notices of Intent is available

3.5.2.1 The online NOi is called nForm and is available through the WDEQ/WQD/WYPDES website.

3.5.2.2 Before submitting an NOi through nForm, users must establish accounts through

Wyoming Online Services (eGov) and the Environmental IT Environmental (ENV-ITE) system. See the nForm webpage under the Water Quality Division for more information and step-by-step instructions.

3.5.2.3 Online payment of permit fees is not available as of this writing. Online applicants will submit payment separately by mail.

3.5.2.4 WQD encourages applicants to use the online system whenever possible.

NOi contents. The NOi shall include the following information, at a minimum:

3.6.1 If the NOi submission is to renew coverage under the general permit, the permittee must so indicate and provide the authorization number to renew;

3.6.2 Permittee: The name of the company, entity, or individual (meeting the definition of

"operator" in Part 2.11) seeking permit coverage and contact information for the legally responsible person as defined in Part 10.7.1;

3.6.3 Local Contact: The name, title and contact information for a person who is familiar with the facility operation and who will be the primary contact for WDEQ for questions about facility operations, scheduling inspections and permit compliance.

3.6.4 Permit fee information: Date the NOi will be submitted, requested expiration date (see Part 6 for more information), amount remitted, and (if available) check number;

3.6.5 Sage Grouse Core Area Determination. The permittee must determine if any part of their project is in Sage Grouse Core Area (SGCA). SGCAs are determined under the Governor's Executive Order 2015-4. For the purposes of only this permit, SGCAs also include Sage Grouse Connectivity Areas and Sage Grouse Winter Concentration Areas. See the Wyoming Game & Fish Department Sage Grouse Management Website (https://wgfd.wyo.gov/Habitat/Sage-Grouse-Management) for a map of SGCAs and other relevant information;

3.6.6 The facility name, location, telephone number, include the WYDOT project number and the name of the WYDOT Resident Engineer if applicable;

3.6.7 Location of the covered facility expressed as quarter/quarter, section, township and range or street address (highway mile markers alone are not sufficient);

3.6.8 Location of the covered facility expressed as latitude and longitude to a minimum of five decimal places;

3.6.9 Estimated project start and final stabilization dates;

3.6.10 Estimated acres of disturbance;

3.6.11 Estimated acreage for the larger "common plan of development or sale" as defined in Part

2.4, if applicable.

Page - 6

3.7

WYR10-0000

This permit is effective only with separate written authorization

3.6.12 Names of receiving waters and, if applicable, note if discharge will be to a municipal storm sewer and for which municipality. Include unnamed drainages in this description;

3.6.13 Identify any water bodies that are listed on the state's 303(d) report as impaired due to sediment, suspended solids or turbidity or have an approved TMDL for sediment, suspended solids or turbidity that:

3.6.13.1 are within 2000 feet the construction site and that may receive runoff from the construction site or;

3.6.13.2 ·will receive construction site storm water discharges that enter a storm sewer system regardless of the distance from the receiving water. For this paragraph, storm sewer systems are considered to be piped systems that are typical in developed areas.

The state's most recent 303{d) list can be found in the current Integrated 305{b) and 303{d) Report. The report can be found on the WQD Watershed Management website under Water Quality Assessment at: http://deq.wyoming.gov/wgd/water-guality-assessment/. Approved TMDLs can be found at http://deq. wyominq.qov/wqd/tmdl/ under the Completed

. Projects/Program Resources link.

3.6.14 Note if a sediment basin or pond, as described in Part 7, will be used on the construction site and described in the SWPPP as required in Part 8.

3.6.15 A description of the activities conducted by the applicant which require it to obtain coverage under this permit;

3.6.16 Name and signature of a legally responsible person as defined in Part 10.7.1.

Application package for a new project without previous coverage

3.7.1 Complete all parts of the NOi (excluding renewal).

3.7.1.1 Paper copy submission requires an original signature on the NOi.

3.7.1.2 Electronic submission through nForm requires that appropriate accounts have been set up prior to submission (see Part 3.5 for more information).

3.7.2 Submit a complete SWPPP with your NOi.

3.7.2.1 Applicants submitting paper NOls may attach a paper SWPPP or electronic copy on a CD or DVD. SWPPPs may also be emailed to deq-stormwater@wyo.gov. SWPPPs submitted by e-mail must include the permittee name and contact information and the project name and location. SWPPPs that are submitted in electronic format must be in PDF or in a format compatible with the most recent version of Microsoft Word. Electronic versions of maps or diagrams must be submitted in PDF or JPG formats. Other electronic formats may be acceptable with the agreement of the Administrator or the Administrator's agent. Electronic submitters using nForm must submit their SWPPP through the nForm app.

3.7.3 A check for the appropriate permit fee must accompany the NOi and SWPPP. Users of nForm will be asked to print out a remittance email. Please send a copy of that email and your check to the address noted on the email. Online payment is not available at this time.

3.7.4 Projects that are wholly or partially in Sage Grouse Core Area. A letter of consistency from the Wyoming Game and Fish Department or documentation that your project is considered de minimus must be attached to the NOi. Users of nForm will upload a scanned copy through the nForm app.

Page - 7

3.8

WYR10-0000

This permit is effective only with separate written authorization

3.7.5 Operators seeking approval for an alternative inspection schedule must submit the proposed inspection plan with their NOi. Approval of an alternative plan may also be requested later (see Part 9.5). Users of nForm should submit their proposed plan through the nForm app.

3.7.6 Incomplete application packages will be returned to the applicant without processing.

3.7.7 Issuance of a Letter of Authorization under this permit does not imply that the WDEQ has

"approved" the applicant's SWPPP. It is the responsibility of the permittee to ensure the effectiveness of their SWPPP through appropriate BMP design, selection, inspection and maintenance.

Renewing an existing authorization to discharge. Renewing an existing authorization with an 'early' expiration date. Master general permit not expiring.

3.8.1 When a project has not achieved "final stabilization" before an impending early authorization date (i.e., the permittee chose an expiration date that is earlier than the expiration date of the master general, in this case March 15, 2020), the permittee shall renew coverage under the current LCGP.

3.8.2 The permittee shall submit a new NOi and indicate that the NOi is for the renewal of a current authorization. Applicants may use a paper NOi or submit an electronic NOi via nForm. See Part 3.5 for more information regarding nForm.

3.8.3 A renewal NOi that arrives at the WDEQ office later than 14 days prior to expiration of the permittee's current authorization may not be processed in time to avoid expiration of coverage.