SWPPP_WY_NPS_GRTE_700(4)_.pdf

Stormwater Pollution Prevention Plan

SWPPP

For:

Improve Safety at Gros Ventre Junction with a Modern Roundabout

WY NPS GRTE 700{4)

Teton County, Wyoming

Federal Highway Administration, Western Federal Lands Highway Division

Project Engineer: __________ _

General Contractor: ----------

Table of

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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 Phm Sheets (plan set and BMP typical details)

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

TAB 8: SWPPP Amendment Log

TAB 9: Erosion/Sediment Control Inspection Reports and Requirements

TAB 10: Corrective Action Log

TAB 11: 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)

., 1 ao.

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 I.11.2.

File approved SWPPP narrative in Tab 1.

Wyoming Department of Environmental Quality

- --nplate for the

_0rm Water Pollution Prevention Plan (for the Large Construction General Permit)

Print Form

Reset Form

PLEASE READ THIS PRIOR TO COMPLETING THE TEMPLATE. While use of this template is optional, your project SWPPP must follow the format set forth in Part 8.2 of the Large Construction General Permit (LCGP) for storm water discharges. SWPPPs that do not follow the required format will be returned to the applicant and processing will be delayed until a compliant SWPPP is submitted to the WDEQ. This template is intended to assist operators in developing a compliant SWPPP. For your convenience, each section below references the relevant paragraph of the LCGP. If there is any question about what is required for a section, refer to the LCGP for information.

The SWPPP is a site-specific, dynamic plan which, when implemented, will control erosion and sedimentation, prevent storm water contamination and comply with the requirements of the federal Clean Water Act and Chapter 2 of the Wyoming Water Quality Rules and Regulations. It is the permittee's responsibility to ensure all required items in the LCGP are adequately addressed and in compliance with all the requirements of the LCGP.

Proiect/Site information

WYPDES Authorization Number: WYRlO

Project/Site Name: WY NPS GRTE 700 (4) & (5), Pathways Phase 4 & 5 oject Location - Enter either:

Quarter/Quarter, Section, Township, Range

OR

Street Address and City

OR

Latitude and Longitude

SWPPP Administrator (8.2.1)

WY NPS GRTE 700 (4): Latitude: 43.574266 N, Longitude: -110.733261 W WY NPS GRTE 700 (5): Latitude: 43.574204 N, Longitude: -110.733218 W

Company or Organization: Federal Highway Administration, Western Federal Lands Highway Division

Name of Individual:

Title:

Phone: Cell Phone:

Fax: 1360-619-7785 E-mail: scott.smithline@dot.gov

Narrative Site Description (8.2.2)

I\ brief description of the nature of the construction activity (8.2.2.1 ):

Phase 4: Connects the existing Jackson Hole Community Pathway along Spring Gulch Road to the existing pathway (phase 2) at Gros Ventre Junction. This design will include two at-grade pathway crossing at Gros Ventre Junction integrated into a modern roundabout. These at-grade crossings will link the new and existing pathways at Gros Ventre Junction.

Phase 5: Construct approximately 1 mile of 10 foot wide asphalt paved non-motorized multi-use pathways in Grand Teton National Park. The park will be connected to its gateway community via an alternative transportation system which is accessible to persons with disabilities.

Proposed sequence of major activities including an estimated completion date (8.2.2.2)

1e typical sequences of major soil-disturbing activities for this project are as follows:

- Borrow (Spread Creek Pit, optional use)

- Clearing -Grubbing

- Topsoil removing/stockpiling

- Excavation/embankment

- Mechanically stabilized earth wall construction

- Culvert modifications

- Final grading and paving Estimated completion date: October 2017

An estimate of the total area of the project site (8.2.2.3):

l estimate of the area expected to undergo clearing, excavation or grading, including off-site materials sources, access roads, areas for support activities and staging/storage areas (8.2.2.3) Note that areas included under a separate WYPDES storm water permit authorization do not need to be included here:

Site Map(s) (8.2.3)

Attach one {or more) map{s) that provide, at a minimum, the following information. The map{s) should be prepared so

3t all of the required information is clearly displayed and it is clear what BMPs will be installed in each major stage of construction, .eluding 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:

1. Preconstruction topography and location of surface waters of the state

2. Construction site boundaries.

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

4. The location of surface waters of the state including any unnamed drainages.

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

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

7. 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.

8. Site topography or storm water drainage patterns including lines showing boundaries between different drainage areas in the project area{s).

9. 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. Include all the same information requested in this section on these off site maps.

10. Storm water discharge locations. Include discharge locations for offsite operations covered under this permit.

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

Best Management Practices (8.2.4) At a minimum, structural storm water best management practices {BMPs) are expected to withstand and function properly during precipitation events up to, and including, a 2-year, 24-hour storm event. Visible and measurable erosion (see Part 7.4 of the LCGP) that leaves the site from such storm events should be minimal. The 2-year, 24-hour event in Wyoming ranges from 0.8 to 2.6 inches.

1 isopluvial map of the 2-year, 24-hour storm depth for the state of Wyoming is available on the WDEQ storm water website .

.=rmittees may substitute equivalent data published by the local municipality or regulatory agency.

The plan shall clearly describe the relationship between the stages of construction and the implementation and maintenance of controls and measures. For example, which controls will be implemented during each stage of construction, such as, clearing and grubbing necessary for perimeter controls, initiation of perimeter controls, remaining clearing and grading, road grading, storm drain installation, final grading, stabilization and removal of control measures.

The description of controls shall address the following minimum components. If the space provided below is inadequate, please attach additional sheets.

Erosion Prevention BMPs (8.2.4.1 a). Clearly describe in detail the storm water erosion control BMPs that will be used at each major stage of construction. Indicate the location of the described measures on the site map(s) as required above. Examples of erosion control BMPs include, but are not limited to, preserving existing vegetation, scheduling (i.e., minimizing site disturbance at a given time), surface roughening, temporary and permanent seeding or planting, soil binders or tackifiers, erosion control blankets/mats, wind erosion control, storm water diversion practices upslope of a construction site, pipe slope drains and outlet protection.

Erosion control BMPS include the following:

- Limiting construction limits to the minimum necessary for construction.

Use of riprap ditches and energy dissipaters where erosion is a concern.

Aggregate topsoil used for shoulders.

Sediment Control BMPs (8.2.4.1 b). Clearly describe in detail the sediment controls that will be used at each major stage of construction. Indicate the location of these BMPs on the required site map(s). Examples of sediment control BMPs include, but are not limited 1Q, sediment barriers (such as straw bales, gravel/rock berms, silt fences, fiber rolls and wattles), undercut lots here curb and gutter is installed, exit tracking controls, vegetated buffer strips, grassed waterways, water bars and water wings.

Measures of sediment control due to construction activities include the following:

- Placing silt fence and/or sediment wattles along ditch lines near waterways, culvert inlets and at selected culvert outlets.

- Stabilized construction entrances (gravel pads and/or oak plank structures) at construction access points.

- Stream diversions on any active surface flow will be implemented during in-water work.

Stabilization Measures (8.2.4.1 c). Describe temporary or permanent stabilization measures (which include, but are not limited to, cover crop plantings, mulching, rolled erosion control products or surface roughening). Refer to the permit at Part 7.14 for 'dditional information. Please note that implementation of stabilization measures is required in areas where further clearing, ·ading, excavating or other earth disturbing activities have permanently ceased or temporarily ceased and are not expected to resume for more than 14 days. See the permit at part 7.14 for further discussion and limited exceptions.

Stabilization measures include the following:

- Conserving existing topsoil from disturbed areas for later placement on finished slopes. Conserved topsoil will be replaced onto completed slopes within the same construction season.

, - All slopes receiving topsoil will be seeded by the park with seed species native to the area.

TABLE OF CONTENTS

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

Part 1 Coverage Under This Permit

1.1 Permit area

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 ....................................... S

3.1 Who must apply

3.2 Deadline to apply

3.3 Processing of NO ls

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 perm it

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

Large Construction General Permit

WYR10-0000

This permit is effective only with separate written authorization

'art 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 Intent 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 geographically-specific general WYPDES permit.

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

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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:// deg. wyom ing.gov /wqd/water-qua lity-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, surveyor markings, etc.) indicating that construction activity will or may occur in the area.

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This permit is effective only with separate written authorization

'.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/wqd/nform/ for further information. Use of nForm is not a requirement.

2.11 "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:Udeg.wyoming.gov/admin/spills-and-emergency-response/. Refer to this website or Chapter 4 of the WWQRR for more information.

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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 water~ requiring the development of Total Maximum Daily Loads (TMDLs} to comply with Section 303(d) ot 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/wgd/water-quality-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

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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 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.

3.2 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:Udeq.wyoming.gov/wqd/storm-water-permitting/resources/construction-general-permits/ 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.

3.3 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 ofthe 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.

3.4.3 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.

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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/wqd/water-quality-assessment/. Approved TMDLs can be found at http://deq.wyoming.gov/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.

3.7 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.

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This permit is effective only with separate written authorization

3.9.8 Deadline to renew. All permittees that receive coverage under this automatic process must submit an NOi, or other form as provided by the Administrator, to this office by June 30, 2016 to maintain coverage under this general permit. Operators who fail to do so will have their coverage under this permit terminated. Construction sites that are not "finally stabilized," and where coverage lapses, may be subject to an enforcement action.

3.10 Agreement to comply. Submission of the NOi to the Department constitutes full agreement by the operator to meet and comply with all requirements of this general permit.

3.11 Projects that may discharge to class 1 waters. Large construction activities that have the potential to discharge to Class 1 waters (see Appendix A for a list of Class 1 waters) may be subject to a site visit by Department personnel prior to issuing coverage under this general permit. Site visits are weather-dependent and may delay coverage under this permit. For example, site visits will not typically be scheduled to areas with heavy snow cover and a visit may not always be possible within 30 days of an NOi and SWPPP submittal. Applicants should plan accordingly.

3.12 Denial of coverage. Except as noted in Parts 3.4 and 3.11, the Administrator shall notify the applicant of the approval or disapproval of coverage under this permit within 30 days of receipt of the NOi. In the case of disapproval, the Administrator shall specify in writing the reason(s) for the disapproval and action(s), if any, that the applicant can take to gain approval.

3.13 Individual permit required. If, after evaluation of the NOi and any additional information requested for the evaluation, it is found that this general permit is not applicable to the operation, the application will be processed as an application for an individual permit. The applicant will be notified of the Administrator's decision to deny authorization under the general permit and require coverage under an individual permit. Additional information may be required and a minimum of 120 days will be required to process the individual application and issue the permit.

3.14 Temporary coverage. The Administrator reserves the right to issue temporary coverage under this general permit to cover storm water discharges from projects required to obtain coverage under an individual permit.

Part 4 Notice of transfer and acceptance (NOTA).

4.1 Transfer of entire permitted area

4.1.1 When operational control over an entire project changes to another operator, the current permittee must transfer permit coverage to the new operator.

4.1.2 A Notice of Transfer and Acceptance (NOTA} must be submitted to the WQD within 14 days of the transfer of operational control. The NOTA must be completed and signed by both parties. An NOTA form is available on the WDEQ storm water web site at:

http://deq.wyoming.gov/wqd/storm-water-permitting/resources/construction-general permits/ or a paper copy may be obtained by calling 307-777-7781.

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This permit is effective only with separate written authorization volume, to minimize erosion at outlets and to minimize downstream channel and stream bank erosion;

7.3.3 Minimize the amount of soil exposed during construction activity;

7.3.4 Minimize the disturbance of steep slopes;

7.3.5 Minimize sediment discharges from the site. The design, installation and maintenance of erosion and sediment controls must address factors such as the amount, frequency, intensity and duration of precipitation, the nature of resulting storm water runoff, and soil characteristics, including the range of soil particle sizes expected to be present on the site;

7.3.6 Provide and maintain natural buffers around surface waters, direct storm water to vegetated areas to increase sediment removal and maximize storm water infiltration, unless infeasible;

and

7.3.7 Minimize soil compaction and, unless infeasible, preserve topsoil.

7.4 Visible or measurable erosion. Visible or measurable erosion, associated with a construction activity, which leaves the construction site as a result of inadequate or ineffective SWPPP design or maintenance of BMPs is prohibited. Visible or measurable erosion is defined as:

7.4.1 Deposits of mud, dirt, sediment, or similar material exceeding one cubic foot volume in any area of 100 square feet or less on public or private roads, adjacent property, or into waters of the state by deliberate actions or as a result of water or wind erosion; or

7.4.2 Evidence of concentrated flows of water over bare soils (such as rills or gullies), turbid or sediment-laden flows, or evidence of on-site erosion on bare slopes, where runoff of water is not filtered, treated, or captured on the site using BMPs specified in the SWPPP; or

7.4.3 Earth slides, mud flows, earth sloughing, or other earth movement which leaves the construction site.

7.5 Consistency with a Total Maximum Daily Load (TMDL}. Storm water discharges regulated under this permit and that may discharge to a surface water that has an approved TMDL for sediment, total suspended solids (TSS), or turbidity must be consistent with the TMDL and any associated waste load allocation (WLA) for construction or storm water-related sediment discharges. In most cases compliance with this permit will be considered adequate, unless otherwise notified by the WDEQ.

The WDEQ may require an individual permit should compliance with the general permit be insufficient to meet relevant WLAs.

7.6 Recovery of offsite sediment. Off-site accumulations of sediment (except tracking onto paved roads) must be removed in a manner and at a frequency sufficient to minimize off-site impacts.

[See Part 7.8 for addressing of/site tracking onto paved roads.]

7.6.1 Where a determination is made that sediment must be removed to prevent deposition within surface waters (or conduits to surface waters, such as storm drain systems), then it must be removed within 7 days of the determination or before the next precipitation event whichever is sooner. The WDEQ may, after consultation with the permittee and upon good cause, amend the sediment removal criteria in this paragraph for specific operations. An operator receiving an approved delay must take reasonable measures, such as the installation of additional BMPs or modification of existing BMPs, to ensure that receiving waters are protected from offsite sediment deposits.

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VWR10-0000

This permit is effective only with separate written authorization

7.9 Use of sediment ponds or basins. The permittee is encouraged, but not required, to install temporary sediment ponds or basins where appropriate in areas where 10 or more acres of disturbed area drain to a common location prior to the runoff leaving the site or entering surface waters of the state. Permittees are also encouraged to use sediment basins or ponds for smaller areas with steep slopes or highly erodible soils even if less than ten acres drains to one area.

7.10 Design of sediment ponds. For purposes of this permit, sediment ponds are those ponds that are large enough to treat and control all runoff from a 10-year, 24-hour or larger precipitation event or that have storage capacity in excess of two acre-feet. Sediment ponds must be designed, constructed and operated in accordance with the requirements found in the WWQRR Chapter 11, Section 31. All design plans and calculations for sediment ponds must be included with the SWPPP at the time of application. Sediment pond designs must be stamped by a Wyoming-licensed, professional engineer (PE}. SWPPPs will not be considered complete where sediment pond plans do not meet the requirements of WWQRR Chapter 11, Section 31 and will result in the applicant's NOi and SWPPP being returned to the applicant.

7.11 Design of sediment basins. Sediment basins are smaller than sediment ponds. If used, basins must provide at least the following:

7.11.1 The basins shall be sized to provide 3,600 cubic feet of runoff storage below the outlet pipe per acre drained to the basin and an additional 900 cubic feet per acre drained for sediment storage. Alternative designs may be used which provide storage below the outlet for a calculated volume of runoff from a 2-year, 24-hour storm and provides not less than 1800 cubic feet of runoff storage below the outlet pipe from each acre drained to the

7.11.2

7.11.3

7.11.4 7.11.5 basin and an additional 900 cubic feet per acre drained for sediment storage.

Basin outlets must be designed to avoid short-circuiting and the discharge of floating debris.

The basin must be designed with the ability to allow complete basin drawdown for maintenance activities. Additionally, the basin should be designed to release sufficient storage volume in a 72 hour period to re-establish the basin's working pool.

The basin must have a stabilized emergency overflow to prevent failure of basin integrity.

All design plans and calculations for sediment basins must be included with the SWPPP at the time of application. When sediment basins are constructed to a standard design provided by the WQD plans will not need to be stamped by a Wyoming-licensed, professional engineer. Basins where the design deviates from the standard plan must have plans and calculations that are stamped by a Wyoming PE.

7.12 Discharge from ponds or basins. When discharging from basins, ponds or other impoundments, utilize outlet structures that withdraw water from near the surface (withdrawal within 3 to 6 inches below the surface is preferred), unless infeasible. Alternative discharge methods, if needed, should not draw off sediment and should minimize discharge turbidity. Energy dissipation must be provided for the outlet.

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This permit is effective only with separate written authorization responsibility of plan administration, either by name or job title. Identified individuals (whether by name or position) must be knowledgeable and experienced in the application of erosion and sediment control BMPs and the installation, inspection and maintenance of such controls.

8.2.2 Site description - narrative: The SWPPP shall have a narrative description of:

8.2.2.1 The nature of the construction activity.

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8.2.2.2 The proposed sequence of major activities and an estimated date final stabilization is expected to be achieved.

8.2.2.3 An estimate of the total area of the site and an estimate of the area expected to undergo clearing, excavation or grading, including off-site borrow areas, access roads, areas for support activities and staging/storage areas.

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 project.

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

8.2.2.6 The location and description of any other potential pollution sources including, but not limited to:

a. vehicle fueling

b. equipment maintenance

c. storage of fertilizers

d. chemicals or paint.

8.2.2.7 The 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.

a. You must note where discharges are to unnamed drainages and 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.

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

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 flow from, the permitted construction activity. BMPs in the SWPPP must be consistent with the assumptions, allocations and requirements of the TMDL. 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/wqd/water-guality-assessment/. Approved TMDLs can be found at http://deg.wyoming.gov/wqd/tmdl/ under the 'Resources' Tab.

This permit is effective only with separate written authorization

8.2.3 Site maps. One (or more} map(s} should be prepared that provide, at a minimum, the following information. Maps 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, including the time between the cessation of active construction and final stabilization. Provide multiple maps if necessary to clearly describe BMP timing and placement. The scale of the map(s} must be sufficient to identify the location of all items required below.

8.2.3.1 Construction site boundaries.

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

8.2.3.3 The location of surface waters of the state as defined in Part 2.12& of this permit.

These include springs, streams, wetlands, lakes and any defined drainages that could receive storm water discharge from the construction site.

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

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

8.2.3.6 Location 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.

8.2.3. 7 Site topography or storm water drainage patterns including lines showing boundaries between different drainage areas in the project area(s}.

8.2.3.8 Include 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 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.

8.2.3.9 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.

8.2.4 Best management practices {BMPs). The plan shall include a narrative description of appropriate controls and measures that will be implemented before, during, and after construction. At a minimum, BMPs in the SWPPP shall conform to the general guidelines found in Appendix C.

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WYR10-0000

This permit is effective only with separate written authorization

The plan shall clearly describe the relationship between the stages of construction and the implementation and maintenance of controls and measures. For example, which controls will be implemented during each of the following stages of construction: clearing and grubbing necessary for perimeter controls, initiation of perimeter controls, remaining clearing and grubbing, road grading, storm drain installation, final grading, stabilization, and removal of control measures.

The description of controls shall address the following minimum components:

8.2.4.1 EROSION AND SEDIMENT CONTROLS. An erosion and sediment control plan shall identify appropriate control measures for each major stage of construction.

a. Erosion prevention BMPs. The goal of erosion prevention is preventing soil (or sediment) movement and keeping it at its original location within the construction site. Each SWPPP shall provide best management practices (BMPs) for erosion prevention wherever practical. Examples of BMPs for erosion prevention include, but are not limited to:

• Preserving existing vegetation,

• Scheduling

• 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

• Outlet protection

b. Sedimentation control. Sedimentation occurs when soil is eroded and transported from its original location. The goal of sedimentation control is to prevent sediment from leaving the construction site and, more particularly, from entering surface waters of the state or storm drain inlets. Every SWPPP shall describe adequate BMPs to achieve sedimentation control. Examples of BMPs for sedimentation control include, but are not limited to:

• Sediment barriers such as straw bales, gravel berms, silt fences, fiber rolls or wattles.

• Sediment traps and basins

• 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

This permit is effective only with separate written authorization

c. The SWPPP must provide for specific practices that will protect surface waters and storm drains from discharge of concrete washout, grindings and/or slurry.

Concrete wash waters, grindings or slurry shall not enter surface waters of the state or storm drains.

d. The SWPPP shall describe appropriate BMPs to control storm water pollution from portable concrete or asphalt batch plants covered under this permit.

e. The SWPPP shall describe employee training to inform personnel of their responsibility in implementing the practices and controls included in the SWPPP such as spill response, good housekeeping and sediment control.

Employee training must be provided at least annually, as new employees are hired or as necessary to ensure compliance with the SWPPP and general permit.

8.2.5 Maintenance. All practices identified in the SWPPP must be maintained in effective operating condition.

8.2.5.1 The plan must indicate, as appropriate, the intervals or conditions upon which

BMPs shall be maintained.

8.2.5.2 BMPs found to be in need of repair or maintenance shall be repaired or maintained in accordance with Appendix C, Part 2. Repair/maintenance activities shall be documented and maintained in accordance with Part 9.7.

8.2.6 Inspections. The plan must describe an inspection program and schedule that meets the requirements of Part 9.

8.2.7 Signature. All SWPPPs must be certified and signed in accordance with Part 10.7 ofthis permit.

Part 9 Self Monitoring and Inspection Requirements

9.1 Site inspections. The permittee shall provide qualified personnel to conduct inspections as required in this section. See Part 9.4 for a discussion of qualified persons.

9.2 Inspection schedules.

9.2.1 Active construction sites. During active construction inspections must be conducted in accordance with one of the two schedules listed below. You must specify in your SWPPP which inspection schedule you will use.

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9.2.1.1 During active construction, qualified personnel shall inspect at least once every 14 calendar days and within 24 hours of any precipitation and/or snow melt event which exceeds 0.5 inches. The permittee shall have the option of maintaining a rain gauge at their site or using the nearest National Weather Service precipitation gauge station. Any rain measurement shall be taken from an area within 10 miles of the construction project, OR

9.2.1.2 At least once every seven days.

This permit is effective only with separate written authorization

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