SWPPP_WA_NPS_OLYM_207(1)_reduced.pdf

Stormwater Pollution Prevention Plan

SWPPP

For:

Rehabilitate Staircase Road, WA NPS OLVM 207(1)

Mason County, WA

Federal Highway Administration, Western Federal Lands Highway Division

Project Engineer: ________ _

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

. 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 Stabjlization _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)

L

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 ASHINGTON 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.

n l

Stormwater Pollution Prevention Plan (SWPPP)

For Construction Activities at:

Project Name:

Project Site Location:

City, County, State, Zip Code:

SWPPP Prepared for:

Organization Name:

Address:

Telephone Number:

SWPPP Prepared by:

Name, Title:

Company/Organization:

Address:

Telephone Number:

Rehabilitate Staircase Road, WA NPS OL YM 207(1)

Olympic National Park

Approximately Hoodsport, Mason County, Washington, 98548

FHW A, Western Federal Lands Highway Division

. 610 East Fifth Street

Vancouver, WA 98661-3801

360-619-7700

.Melissa J. Hogan, Environmental Protection Specialist

FHWA, Western Federal Lands Highway Division

610 East Fifth Street

Vancouver, WA 98661-3801

360-619-7735

SWPPP Preparation Date: 08/28/2018

Estimated Construction Start Date: 04/01/2019 Estimated Construction Completion Date: 091301i 019

Estimated Revegetation Start Date: 09/01/2019 Estimated Revegetation Completion Date: 09t31l2020

SWPPP T ABs (SWPPP Inclusions)

TAB 1: SWPPP/ESCP Narrative

TAB2: NPDES Permit (Construction General Permit or Corresponding State Permit)

TAB3: NOi, EP NState Acknowledgement, Other Applicable EP NState Correspondence

TAB4: Delegation of Authority

TABS: Maps

TAB6: Erosion/Sediment Control Plan Sheets (plan set and BMP typical details)

TAB7: Revegetation Plan (if applicable)

TABS: SWPPP Amendment Log

TAB9: Inspection Reports

TAB 10: Corrective Action Log

TAB 11: Water Quality Monitoring, Reporting Requirements, and Reports (if applicable)

TAB 12: Training/Certification Log

TAB 13: Government-Selected Waste, Borrow, Staging Sites

TAB 14: Grading and Stabilization Log

TAB 15: Hazardous Spill Plan or SPCC

TAB 16: Threatened and Endangered Species and Historic Preservation (Section 106) J

Documentation

TAB 17: NPDES Quality Assurance Checklist

TAB 18: NPDES Notice of Termination (NOT)

TAB 1:

SWPPP/ESCP NARRATIVE

C·

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Table of Contents

STORMWATER POLLUTION PREVENTION PLAN (SWPPP)

SECTION 1: RESPONSIBLE PARTIES/CONTACT INFORMATION

1.1 Operator(s):

1.2 Construction Site SWPPP Contact(s):

1.3 SWPPP Prepared by:

1.4 NPDES Stormwater Permit

1.5 SWPPP Administrator

1.6 Permitting Authority for FHW A/WFLHD Projects

SECTION 2: PROJECT INFORMATION ............................................................................... ! 3

2.1 Project Name and Location

2.2 Project Site Characteristics

SECTION 3: NATURE OF CONSTRUCTION ACTIVITY

3.1 General Description of Project and Scope of Work: .................................... :

c·-, 3.2 Sequence and Estimated Dates of Construction Activities

3.3 Potential Sources of Pollutants

SECTION 4: SITE MAPS

SECTION 5: DISCHARGES

5.1 Allowable Non-Stormwater Discharges

5.2 Receiving Waters:

5.3 Water Quality Monitoring Requirements

SECTION 6: COMPLIANCE WITH OTHER APPLICABLE REQUIREMENTS

6.1 Endangered Species Protection

6.2 Historic Preservation

6.3 Safe Drinking Water Act Underground Injection Control Requirements

SECTION 7: EROSION AND SEDIMENT CONTROLS

7.1 Natural Buffers or Equivalent Sediment Controls (Required for EPA CGP states only - ID, WA)19

C' 7.2 Perimeter Controls

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7.3 Sediment Track-Out

-----7.4 Stockpiled Soil or Other Erodible Materials

7.5 Minimize Dust

7 .6 Minimize Disturbance of Steep Slopes

7.7 Topsoil Conservation

7 .8 Minimize Soil Compaction

7 .9 Storm Drain Inlets and Culvert Inlets

7.10 Constructed Stormwater Conveyance Channels and Culvert Outlets

7.11 Sediment Basins

7.12 Chemical Treatment

7 .13 Dewatering Practices .................................................................................................................... 26 ·

7.14 Erosion Control and Stabilization

7.15 Removal of BMPs

7.16 Post Construction Measures

SECTION 8: OPERATIONAL CONTROLS/GOOD HOUSEKEEPING MEASURES

8.1 Hazardous Spill Plan

8.2 Spills/Releases in Excess of Reportable Quantities

8.3 EquipmentNehicle Fueling and Maintenance Practices

8.4 EquipmentNehicle Washing

8.5 Material Handling and Waste Management

8.6 Designate Concrete Washout Areas ........................................................................................... 31 _

SECTION 9: INSPECTIONS

9.1 Inspection Frequency

9.2 Corrective Actions

SECTION 10: DELEGATIONS OF AUTHORITY

SECTION 11: STAFF TRAINING

SECTION 12: CERTIFICATION AND NOTIFICATION

\ I ,I

[ii]

C_)

Section 1: Responsible Parties/Contact Information

1.1 Operator(s):

Organization Name:

Address:

Telephone Number:

Contractor and PE

FHWA, Western Federal Lands Highway Division (WFLHD) t 610 East Fifth Street

Vancol!_ver, WA 98661-3801 360-619-7700

Note: Fill in all incomplete information following contract award date and prior to start of construction

(AK, ID, WA projects only) General Contractor Name:

Address:

Telephone Number:

Contractor and PE Note: Fill in all incomplete information following contract award date and prior to start of construction

1.2 Construction Site SWPPP Contact(s):

FHW A Contact Name:

Title:

Address:

Telephone Number:

General Contractor, Company:

( complete for all States) Erosion Control Supervisor Name:

( complete for all States) Address:

Telephone Number:

Project Engineer

1.3 SWPPP Prepared by:

Organization/Company:

Name, Position:

Role/Responsibility Telephone Number:

Email:

Melissa J. Hogan, Environmental Protection Specialist : _ SWPPP Preparer i· 360-619-7735 : Melissa.j.hogan@dot.gov

[I]

1.4 NPDES Stormwater Permit

The Applicable EP NState NPDES Stormwater Permit is located in TAB 2. The Project NOi and EP NState Acknowledgement with NPDES Tracking Number is located in TAB 3.

1.5 SWPPP Administrator

The General Contractor (section 1.2) is responsible for maintaining the project SWPPP of Record. The General Contractor will provide a qualified Erosion Control Supervisor, who is responsible for managing the installation, maintenance, inspection, and reporting for erosion and sediment control measures, shall maintain and update the project SWPPP of Record and prepare all documentation required by the project NPDES stormwater permit and SWPPP.

The Erosion Control Supervisor (ECS) is identified in section 1.2 and his/her qualifications are documented in TAB 12.

The FHW NWFLHD Project Engineer (PE) is the duly authorized representative of the FHW A for the purpose of overseeing compliance with the NPDES stormwater permit and SWPPP at the construction site. See Delegation of Authority TAB 4.

All SWPPP documentation, revisions/updates, and reports will be approved/signed by both the General Contractor's ECS and the FHW A PE.

1.6 Permitting Authority for FHW A/WFLHD Projects

Delivery Confirmation documentation of the NOi is located in TAB 3.

The applicable EP NState NPDES permit is located in TAB 2

Idaho and Washington, Environmental Protection Agency EPA Region 10

State Permittine: Authority - --

Washington • WDE is permitting authority for most discharges within the state EXCEPT for:

• EPA is permitting authority for Federal Operators and Indian Country lands within the state

The NOi for projects in Idaho, Washington, Denali NP and Metlakatla Indian Reservation can be filed electronically at The EPA website.

[2]

SectiQn 2: Project Information

2.1 Project Name and Location

This basic site information is used to file for National Pollutant Discharge Elimination System (NPDES) permit coverage. Permit coverage is obtained by filing the Notice of Intent (NOi) after the SWPPP is complete.

Project Name:

Project Site Location:

City, County, State, Zip Code:

Latitude, Longitude:

Rehabilitate Staircase Road SWPPP, WA NPS OL YM 207(1)

Olympic National Park

Approximately Hoodsport, Mason County, Washington, 98548

*The method used for determining latitude/longitude was: Other Website National Geographic TOPO! Application

Approximate Start: 47.50587, -123.31549 Approximate End: 47.51545, -123.32963

Township/Range/Section: T 23 N, R 3 W, S 36

Is the project located in Indian country? No

Are you applying for permit coverage as a "federal operator?" Yes

C The project Does Not discharge stormwater into a Municipal Separate Storm Sewer System.

2.2 Project Site Characteristics

The undeveloped site and features of the land that are incorporated into the final soil Erosion and Sediment Control plan sheets (TAB 6) , as well as natural resources that should be protected are described below:

Vegetation, trees, and sensitive areas, such as stream buffers, wetlands, highly erodible soils, and steep slopes at the site include:

The general setting is mountainous and forested, with numerous perennial and intermittent streams dissecting the hillslopes. The primary waterbodies in the project area are North Fork Skokomish River and Lake Cushman

Olympic National Park is home but not limited to the following vegetation: Sitka spruce, Bigleaf maple, Vine maple, Western hemlock, Douglas fir, Red alder, Western redcedar, Black cottonwood, Salmonberry, Huckleberry, Licorice fem, Oregon selaginella, Cat-tail moss, Lungwort, Oregon oxalis, Sword fem, Lady fem, Stair-step moss, and both native and non-native herbs and grasses.

Generally, the understory includes a dense layer of shrubs, vines, and herbaceous species. The thick, layered canopy above moderates the temperature year-round for wildlife, including the largest wild populations of Roosevelt elk in the U.S.

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Temperatures in Olympic National Park are typically moderate; in low elevation valleys the temperature seldom drops below freezing and summertime highs rarely exceed 80°F. Storms off the Pacific Ocean drop much of their moisture on the west-facing valleys.

Also, see TAB 6

Stormwater currently drains from the site in the following manner, Stormwater presently drains from the site by means of soil infiltration and sheet flow into adjacent road embankment and ditches.

Also, see TAB 6

The location of discharge points or areas

Culvert outlets, roadside ditches that drain into surface waters and their adjacent vegetated buffers.

Also see TAB 6

The location of all waters, including wetlands, are shown on the site map located in

TABs 5 and 6.

Critical slopes and slope lengths include:

WSDOT's Unstable Slopes database shows none within the vicinity.

Soil type(s) of highly erodible soils and the soils' infiltration capacity are identified as, 1

Most of the soil data was unavailable from the USDA Web Soil Survey for the length of this project. A small amount of data was available for an area near the beginning of the project yielded the following results:

1 NRCS Web Soil Survey.

[4] c\ t.1blcs - Kr m.tor, Whole Sod Summary Uy Map Unil fJ summary by Map Unit - Olympic National Fo~t Area, Washington (Parts of Clallam, Grays Harbor, Jefferson, and Mason Counties) (WA632) Summary b<;Map Unit - Olympic National Part<, Washington (WA7JO)

Summary by Map Unit - Olympic National Forest Area, Washington (Parts of Clallam, Grays Harbor, Jefferson, and Mason Counties) ®

(WA632)

Map unit s-ymbol Map unit name Rating Acres in AOI Percent of AOI

511N8 Hammahamma-Frlcaba complex, 30 to 60 percent south slopes .10 3.3 11.4%

983 Water 0.4 1.4%

Subtotals for Soll Survey Area 3.7 12.80/o summary by Map Unit - Olympic National Park, Washington (WA730) ® Map unit symbol Map unit name Rating Acres in AOI Percent of AOl

NOTCOM No Digital Data Available 25.0

Subtotals for Soll Survey Area 25.0

Totals for Area of Interest 28,7

Any past soil contamination at the site is identified as, None found in Washington Ecology databases including Brownfields, Environmental Covenants Registry, Leaking Underground Storage Tanks, State Cleanup Sites, Underground Storage Tanks (Active and Inactive), or Voluntary Cleanup Program. None found in EPA Superfund Site database.

87 .2%

87.20/o

100.00/o

The following natural features, including trees, streams, wetlands, slopes and other features to be protected includes:

Also see TAB 6

Protected Natural Features:

North Fork Skokomish River, Unnamed tributary to North Fork Skokomish River, and Unnamed tributary to Lake Cushman.

Measures to protect these features:

Project will utilize erosion and sediment control BMPs to avoid discharging sediment-laden, construction stormwater runoff into the streams. In addition, in water work will be done in the dry to maintain water quality standards.

10-year Mean Annual Precipitation at the Project Site (inches):2 90.58

The frequency, intensity, and duration of rainfall for the project site, which are the principal factors influencing erosion from a construction site, are described as, The 2-year, 24-hour storm event:3

2 NRCS Annual Climate Data 3 Precipitation frequency for Western States

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5.5 inches/year

The 10-year, 24-hour storm event:

7.5 inches/year

The 25-year, 24-hour storm event:

9.0 inches/year

[6] l

Section 3: Nature of Construction Activity

3.1 General Description of Project and Scope of Work:

(i.e. highway construction, roadway realignment, highway and bridge reconstruction, etc.) is described below:

The project includes:

1. Linear improvements of the road (Paving for the roadway length).

2. Pavement preservation for the campground and several parking areas at or near the end of the road.

3. Trenching and conduit placement for future utilities (to be installed in 2020).

4. Replacement of several culverts.

This project will pave approximately 1 mile of existing paved road. Fog lines will be painted on the new asphalt (approximately 5,280 linear feet total.) Within this one mile, trenching and conduit will be placed for future utilities. Trenching will be located along the roadway and stopping near the bridge at the road termini. Two pull boxes have been requested by the Park.

Three 2" conduits will be placed in the trench. Approximately one half mile of this one mile paving will be milled to full depth, the base re-contoured and compacted, and a new four inch mat of hot mix asphalt applied to address slumping in the pavement. Project includes replacement of non-functioning cross culverts and re-establishing ditch drainages, where needed. Project also includes pavement preservation (pavement on top of existing pavement) for the campground and several parking areas at or near the end of the road. Finally, the project includes paving an existing compacted gravel parking area and replacement of signs, where needed.

Road rehabilitation will also include culvert replacement and culvert construction. One 18-inch culvert, one 36-inch culvert, and five 24-inch culverts will be replaced.

The type or function of the project is: Other transportation-related including Parking

Construction Support Activities: If applicable, describe any construction support activities such as dedicated concrete or asphalt batch plants, dedicated aggregate sites, equipment staging yards, material storage areas, borrow, or disposal sites (government-selected sites):

To be completed by contractor

NOTE: All Contractor-selected sources and support sites are the sole responsibility of the General Contractor. The SWPPP and NPDES permitting for Contractor-selected sites and sources are separate from this documentation (SCR 107.0lA(h)).

Support activities are located on the general vicinity map and/or site map in TAB 5 and TAB 6.

[7]

Size of Project Action Area:

(Including all Government-selected support sites such as staging, borrow, waste, access roads, affected downstream area, noise perimeter, extent oflight effects, etc.)

Estimated Area

Total project area (outermost project footprint):

Project area to be disturbed (area of digging):

Percent Impervious Project Area BEFORE Construction: 75 %

Runoff Coefficient BEFORE Construction: 0.82

Percent Impervious Project Area AFTER Construction: 96 %

Runoff Coefficient AFTER Construction: 0.93

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Units

4 Acres

2 Acres r

3.

Se qu en ce a nd

E st im at ed D at es o f C on st ru ct io n

A ct iv it ie s

T he in te nd ed c on st ru ct io n se qu en ci ng a nd ti m in g o f m aj or c on st ru ct io n ac ti vi ti es is d et ai le d he re

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C on tr ac to r an d

P E

N ot e:

F il l in a ll in co m pl et e in fo rm at io n fo ll ow in g co nt ra ct a w ar d da te a nd p ri or to s ta rt o f c on st ru ct io n

P ha se

C on st ru ct io n se qu en ce d es cr ip ti on

D ur at io n o f s eq ue nc e:

B M

P s as so ci at ed w it h t hi s St ab il iz at io n m ea su re s:

se qu en ce

C li ck h er e to e nt er te xt

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P ha se

C on st ru ct io n se qu en ce d es cr ip ti on

D ur at io n o f s eq ue

P s as so ci at ed w it h t hi s St ab il iz at io n m ea su en ce

C li ck h er e to e nt er te xt

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P h as

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C on st ru ct io n se qu en ce d es cr ip ti on

D ur at io n o f s eq ue

P s as so ci at ed w it h t hi s St ab il iz at io n m ea su en ce

C li ck h er e to e nt er te xt

C li ck h er e to e nt er te xt

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C li ck h er e to e nt er te xt

P ha se

C on st ru ct io n se qu en ce d es cr ip ti on

D ur at io n o f s eq ue

P s as so ci at ed w it h t hi s St ab il iz at io n m ea su en ce

C li ck h er e to e nt er te xt

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P ha se

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P s as so ci at ed w it h t hi s St ab il iz at io n m ea su en ce

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[1 0]

3.3 Potential Sources of Pollutants

r1 The follow table identifies all potential sources ( checked activities in column 1) of sediment and other sources of pollution, which may reasonably be expected to affect the quality of stonnwater discharges from the construction site.

g .0 ·.c c;

"C c;

Potential Construction Site Pollutants

Construction Activity "' "' .... .'!l

~ " ... = ·;: i;:, "O e ... ..c -~ ·u ~ ~ ~ "' .. ·..:: :a c; = "' .Q "' ... = "' i5 ... "' " 00 z CQ C. E--Q g,.

Clearing, excavating, and grading X X

Fill of roadway embankment, backfill at structures X X

Vehicle/equipment fueling and maintenance X X

Vehicle/equipment use and storage X

Sanitary/septic waste X X

Dewatering operations X X

Drilling and blasting operations X X X

Concrete washout and waste X X

Structure construction/painting/cleaning X X X

Demolition and debris disposal X X X

Solid waste (trash and debris) X

Hazardous waste or contaminated spills X

Paving operations X X

Landscaping operations X X X

Mining, rock extraction, crushing X X X

Contractor and PE

Note: Fill in all incomplete information following contract award date and prior to start of construction

Construction and waste material expected to be stored on-site includes:

Material Storage Location

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"' 'B ..

X

X

.'!l

..c = .... Q Oi:i.

X

X

X

X

X

X

Section 4: Site Maps

Vicinity maps are located in TAB 5.

Site maps and erosion and sediment control plan maps are located in T B 6.

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Section 5: Discharges

Industrial stormwater discharges associated with industrial activity other than construction at the site (including dedicated asphalt plants and dedicated concrete plants that are covered by this permit) include:

NOTE: An Industrial Activity Multi-Sector General Permit may be required for some activities.

Industrial Activity

1. None

2.

3.

Stormwater Discharge Location

5.1 Allowable Non-Stormwater Discharges

Multi-Sector General Permit Number (if applicable)

Non-stormwater discharges used at the construction sited are identified below, along with control measures used to eliminate or reduce the discharges and BMPs used to prevent stormwater contamination.

Applicable to this Project

(check all that apply)

Potential Non-Stormwater Discharges

Waters used to wash vehicles where detergents are not used

' Water used to control dust

Potable water including uncontaminated water line flushings

: Construction dewatering (uncontaminated)

Ground water or spring water (uncontaminated)

Routine external building wash down that does not use detergents

Pavement wash waters where spills or leaks of toxic or hazardous materials have not occurred (unless all spilled material has been

· removed) and where detergents are not used

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

D Landscape irrigation

~ Discharges from emergency fire-fighting activities

D Fire hydrant flushings

D ' Uncontaminated air conditioning or compressor condensate

Control Measures

To be completed by contractor

NOTE: The likely locations of these discharges are identified on the site map TAB 5 and/or

TAB6

5.2 Receiving Waters:

Are there any surface waters located within 50 feet of the construction disturbance? Yes [13]

·I

I Name(s) of the fi;~t surface water that receiv~s-stor~wat~r-dir;~tly from yo-ur site ;nd/or from the MS4

1. North Fork Skokomish River

2. Unnamed tributary to North Fork Skokomish River

3. Unnamed tributary to Lake Cushman

4. Lincoln Creek _

Impaired Waters/TDMLs:

Answer the following for each surface water listed in Table 1:

Is this surface What pollutant(s) is Has a TMDL Pollutant(s) for which water listed as causing the been there is a TDML "impaired?" impairment? completed?

1. Yes 0No rgj Yes D No rgj

2. Yes 0No rgj Yes 0No rgj

3. Yes 0No rgj Yes 0No rgj

4. Yes 0No rgj Yes D No rgj

Source used to determine whether or not your project discharges into an impaired water:

EPA 303( d) GIS Data

Tier 2, 2.5, or 3 Waters

Answer the following for each surface water listed in Table 1:

Is this surface If yes, specify which Tier.

water designated as Tier 2, 2.5, or 3?

1. Yes 0No rgj Choose an item.

2. Yes 0No rgj Choose an item.

3. Yes 0No rgj Choose an item.

4. Yes 0No rgj Choose an item.

If applicable, documentation of consultation with State or Federal TMDL authorities on consistency of SWPPP conditions with the approved TMDL is found in TAB 11. The control measures required to ensure that discharge of pollutants from the site are consistent with the assumptions and requirements of the EPA-established or approved TMDL, including any specific waste-load allocations are included in that documentation.

5.3 Water Quality Monitoring Requirements

Provisions in Permit Conditions of the applicable NPDES stormwater permit, as well as the associated §401 certification or other special conditions, define additional monitoring and

(14]

( i reporting requirements. Details about water quality monitoring and reporting requirements applicable to this project are included in TAB 11 .

Samples and measurements taken for the purpose of monitoring will be representative of the monitored activity. Records of all monitoring information will be retained in TAB 11, including all calibration and maintenance records and all original strip chart recordings for continuous monitoring instrumentation.

Records of monitoring information will include:

1. The date, exact place, and time of sampling or measurements;

2. The individual(s) who performed the sampling or measurements;

3. The date(s) analyses were performed

4. The individual(s) who performed the analyses;

5. The analytical techniques or methods used; and

6. The results of such analyses.

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Section 6: Compliance with Other Applicable Requirements

6.1 Endangered Species Protection

Under which criterion is project eligible for Endangered Species coverage under the NPDES permit (EPA)?

DA DB De Dn ~E DF

Criterion A.

Criterion B.

Criterion C

Criterion D.

No federally-listed threatened or endangered species or their designated critical habitat(s) are likely to occur in your site's "action area" as defined in Appendix A of EPA permit. ·

The construction site's discharges and discharge-related activities were already addressed in another operator's valid certification of eligibility for your action area under eligibility Criterion A, C, D, E, or F and there is no reason to believe that federally-listed species or federally-designated critical habitat not considered in the prior certification may be present or located in the "action area". To certify your eligibility under this Criterion, there must be no lapse ofNPDES permit coverage in the other operator's certification. By certifying eligibility under this Criterion, you agree to comply with any effluent limitations or conditions upon which the other operator's certification was based. You must include in your NOI the tracking number from the other operator's notification of authorization under this permit. If your certification is based on another operator's certification under Criterion C, you must provide EPA with the relevant supporting information required of existing dischargers in Criterion C in the EPA NOI form.

Federally-listed threatened or endangered species or their designated critical habitat(s) are likely to occur in or near your site's "action area," and your site's discharges and discharge-related activities are not likely to adversely affect listed threatened or endangered species or critical habitat. This determination may include consideration of any stormwater controls and/or management practices you will adopt to ensure that your discharges and discharge-related activities are not likely to adversely affe~t listed species and critical habitat. To make this certification, you must include the following in your NOI: 1) any federally listed species and/or designated habitat located in your "action area"; and

2) the distance between your site and the listed species or designated critical habitat (in miles). You must also include a copy of your site map with the NOL

Coordination between you and the Services has been concluded. The coordination must have addressed the effects of your site's discharges and discharge-related activities on federally-listed threatened or endangered species and federally-designated critical habitat, and must have resulted in a written concurrence from the relevant Service(s) that your site's discharges and discharge-related activities are not likely to adversely affect listed species or critical habitat. You must include copies of the

[16]

Criterion E.

Criterion F.

correspondence between yourself and the Services in your SWPPP and

NOI.

Consultation between a Federal Agency and the U.S. Fish and Wildlife Service and/or the National Marine Fisheries Service under section 7 of the ESA has been concluded. The consultation must have addressed the effects of the construction site's discharges and discharge-related activities on federally-listed threatened or endangered species and federally-designated critical habitat. The result of this consultation must be either:

1. a biological opinion that concludes that the action in question (taking into account the effects of your site's discharges and discharge-related activities) is not likely to jeopardize the continued existence of listed species, nor the destruction or adverse modification of critical habitat;

or

11. written concurrence from the applicable Service(s) with a finding that the site's discharges and discharge-related activities are not likely to adversely affect federally-listed species or federally-designated habitat.

You must include copies of the correspondence between yourself and the Services in your SWPPP and NOI.

Your construction activities are authorized through the issuance of a permit under section 10 of the ESA, and this authorization addresses the effects of the site's discharges and discharge-related activities on federally listed species and federally-designated critical habitat. You must include copies of the correspondence between yourself and the Services in your SWPPP and NOI.

Support Documentation for Endangered Species criterion eligibility is filed in TAB 16.

6.2 Historic Preservation

I. Will the project involve installation of any of the following stormwater controls that entail subsurface earth disturbance? Yes

0 Dike

D Berm

D Catch Basin

D Pond

D Ditch, trench, swale, perimeter drain, etc.

[gj Culvert

D Other ground-disturbing stormwater control Click here to enter text.

If the project involves no installation of earth-disturbing stormwater controls, then no further historic preservation screening is necessary (for NPDES permitting purposes).

2. If answer to step I is Yes, have professional surveys or evaluations determined that historic properties do not exist (or have prior disturbances at the site precluded the existence of historic properties)? Yes

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Provide documentation for the basis of this determination. NPS is Section 106 lead and has completed consultation.

3. If answer to step 2 is No, have professional surveys or evaluations determined that installation of stormwater controls will have no effect on historic properties? Choose an item.

Provide documentation for the basis of this determination. Click here to enter text.

4. Has-the State Historic Preservation Officer (SHPO), Tribal Historic Preservation Office (THPO) or other tribal representative concurred with the determinations of effects on historic properties? Yes

Provide the nature of their response. The Skokomish Tribe has no concerns. SHPO concurrence is not required as NPS does not consult on streamlined reviews.

6.3 Safe Drinking Water Act Underground Injection Control Requirements

Will the project plan install any of the following controls? No

Check all that apply:

D Infiltration trenches (if stormwater is directed to any bored, drilled, driven shaft or dug hole that is deeper than is widest surface dimension, or has a subsurface fluid distribution system)

D Commercially manufactured pre-cast or pre-built proprietary subsurface detention vaults, chambers, or other devices designed to capture and infiltrate stormwater flow.

D Drywells, seepage pits, or improved sinkholes (if stormwater is directed to any bored, drilled, driven shaft or dug hole that is deeper than its widest surface dimension, or has a subsurface fluid distribution system)

If yes, provide documentation of communications with the EPA or applicable State agency.

Click here to enter text.

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I .

C)

Section 7: Erosion and Sediment 'Controls

Control measures at the construction site are selected, installed, implemented, and maintained to minimize pollutants in the discharge as necessary to meet applicable water quality standards.

The objectives of this SWPPP include:

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

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

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

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

• Divert stormwater coming on to the site by conveying it safely around, through, or under the work area. (Divert the clean water, trap the dirty water.)

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

• Follow pollution prevention measures by providing proper containers for waste and garbage at the site. Store hazardous materials and chemicals so that they are not exposed to stormwater.

• Minimize the area and duration of exposed soils. Clear only land that will be under construction in the near future.

7.1 Natural Buffers or Equivalent Sediment Controls (Required for EPA CGP states only - ID, WA)

This section only applies if a surface water is located within 50 feet of the project's earth disturbing activities.

Are there any surface waters within 50 feet of the project's earth disturbances? Yes

If No, then no further documentation is required for the SWPPP.

NOTE: Reference EPA CGP appendix G for buffer guidance.

If Yes, check which natural buffer compliance alternative is used at the project site:

D The project will provide and maintain a 50-foot wide undisturbed natural buffer.

The location and width of natural buffers are shown on the Erosion and Sediment Control Plan sheets in TAB 6.

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0 The project will provide and maintain an undisturbed natural buffer that is less than 50 feet in width and is supplemented by additional erosion and sediment controls, which in combination achieves the sediment load reduction equivalent to a 50-foot undisturbed natural buffer.

The location of natural buffers are shown on the Erosion and Sediment Control Plan sheets in TAB 6.

Insert the width of the natural buffer to be retained Click here to "nter text.

Insert description of additional erosion and sediment controls to be used in combination with the natural buffer: Click here to enter text.

Document the method used to determine that the above combination of natural buffer and sediment and erosion controls equal the estimated sediment removal capacity of a 50-foot undisturbed natural buffer: Click here to enter text.

[g] It is infeasible to provide and maintain an undisturbed natural buffer of any size, therefore, the project will implement erosion and sediment controls that achieve the sediment load reduction equivalent to a 50-foot undisturbed natural buffer.

Insert rationale for concluding that providing and maintaining a natural buffer of any size is infeasible: Work will be conducted directly within the stream channel.

Insert description of erosion and sediment controls to be used to achieve the sediment load reduction equivalent to a 50-foot undisturbed natural buffer: Fiber rolls and silt fence will be installed prior to earth-disturbing work conducted in and around waterways.

0 The project qualifies for one of the exceptions in EPA CGP Part 2.1.2.1.e

0 For a "linear project", site constraints (e.g. limited right of way) make it infeasible for the project to meet any of the CGP part 2.1.2.1.a compliance alternatives.

0 Other exception (state type): Click here to enter text.

Document why it is infeasible to meet one of the buffer compliance alternatives: Click here to enter text.

Insert description of erosion and sediment controls to be used to achieve the sediment load

· reduction equivalent to a 50-foot undisturbed natural buffer: Click here to enter text.

7.2 Perimeter Controls

All Perimeter Sediment Controls will be installed prior to ground disturbing activities taking place. There will be no clearing or grubbing outside the physical clearance limits.

Locations and design specifications ofBMPs are shown on the erosion and sediment control plan sheets in TAB 6.

The following perimeter controls will be implemented:

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Measure: Fiber rolls Implementation: All fiber rolls will be installed prior to any ground disturbing activities. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Sediment will be removed from fiber roll perimeter controls before deposits reach 50% of the above ground height. It is the Contractor's responsibility to upgrade erosion control measures as necessary if the sediment controls are ineffective and turbid water is observed discharging from the site. Fiber rolls will not be removed until vegetation is satisfactorily established.

Measure: Silt Fence Implementation: The silt fence shall be functional before other land disturbing activities take place. Silt fence should be functional throughout the duration of construction and for a long enough duration following construction to allow disturbed areas to stabilize following revegetation and seeding. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Silt fences should be inspected periodically for damage (such as tearing by wind, animals, or equipment) and for sediment that has accumulated. Remove the sediment when it reaches one-half the height of the silt fence. In situations where access is available, machinery can be used. Otherwise, silt should be removed manually. The following are key elements to remember:

• The sediment deposits should be removed when heavy rain or high water is anticipated.

• The sediment deposits should be placed in an area where there is little danger of erosion.

• The silt fence should not be removed until adequate vegetative growth ensures no further erosion of the slopes. Generally, the fabric is cut at ground level, the wire and posts are removed, then the sediment is spread, seeded, and protected (mulched) immediately.

Measure: Temporary Diversion Berm Implementation: In accordance with project schedule and contract. Structure should be in working condition before usage is necessary and should remain in such condition until it is no longer needed. Please also refer to the project plan set (Erosion Control section).

Maintenance: Damaged sections of the diversion berm should be replaced immediately.

Contractor and PE Note: Add additional measures used during construction.

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7.3 Sediment Track-Out

The following methods will be implemented to minimize off-site vehicle tracking of sediment onto paved surfaces. If sediment escapes the construction site, off-site accumulations of sediment will be removed at a frequency sufficient to minimize off-site impacts.

Locations and design specifications of BMPs are shown on the erosion and sediment control plan sheets in TAB 6.

Measure: Washing within perimeter, without detergents or solvents Implementation: During active construction, as necessary. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Care must be taken that runoff is directed within construction perimeter and is to be managed by established control methods already in place. Any uncontrollable runoff must be remedied and additional BMPs put in place.

Contractor and PE Note: Add additional measures used during construction.

7 .4 Stockpiled Soil or Other Erodible Materials

Stockpile management includes measures to minimize surface erosion and sediment transport from soil stockpiles or other erodible materials.

Locate erodible stockpiles away from drainages including storm sewer inlets and culvert inlets.

Locations of stockpiles are shown on the erosion and sediment control plan sheets in TAB 6. ·

Measure: Distribute layer of soft vegetative top soil after compaction complete Implementation: After soil compaction is complete and prior to revegetation efforts. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Maximize depth whenever possible and seed as soon as practicable. If seeding cannot occur in a timely manner, other BMPs (nets, blankets, etc.) will be placed to mitigate erosion.

Measure: Fiber rolls Implementation: All fiber rolls will be installed prior to any ground disturbing activities. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Sediment will be removed from fiber roll perimeter controls before deposits reach 50% of the above ground height. It is the Contractor's responsibility to upgrade erosion control measures as necessary if the sediment controls are ineffective and turbid water is observed discharging from the site. Fiber rolls will not be removed until vegetation is satisfactorily established. ·

Measure: Silt Fence Implementation: The silt fence shall be functional before other land disturbing activities take

(22] place. Silt fence should be functional throughout the duration of construction and for a long n enough duration following construction to allow disturbed areas to stabilize following revegetation and seeding. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Silt fences should be inspected periodically for damage (such as tearing by wind, animals, or equipment) and for sediment that has accumulated. Remove the sediment when it reaches one-half the height of the silt fence. In situations where access is available, machinery can be used. Otherwise, silt should be removed manually. The following are key elements to remember:

• The sediment deposits should be removed when heavy rain or high water is anticipated.

• The sediment deposits should be placed in an area where there is little danger of erosion.

• The silt fence should not be removed until adequate vegetative growth ensures no further erosion of the slopes. Generally, the fabric is cut at ground level, the wire and posts are removed, then the sediment is spread, seeded, and protected (mulched) immediately.

Measure: Plastic sheets (, Implementation: Soil stockpiles and other erodible materials should be covered by plastic as soon as they are generated. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Contractor should frequently check plastic to ensure soil or other erodible material is covered.

Contractor and PE Note: Add additional measures used during construction.

7 .5 Minimize Dust

Dust control includes practices used to reduce or prevent the surface and air transport of dust during construction

Measure: Application of water for dust control Implementation: During active construction as needed. Apply at a rate of 3 gallons per acre, using a diffused or sprinkled flow. Care should be taken not to saturate or muddy the dust and that dust generation does not increase. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Application of water for dust control requires constant attention. Sprinkling will likely need to be done several times per day, especially during hot, dry weather.

Contractor and PE

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Note: Add additional measures used during construction.

7 .6 Minimize Disturbance of Steep Slopes

Describe how disturbance of steep slopes will be minimized. Describe controls ( e.g. erosion control blankets, tackifiers) that will be implemented to minimize sediment discharges from slope disturbances.

If applicable, describe how stormwater run-on and run-off will be managed. Flows may be diverted from exposed soils by retaining/detaining flows or otherwise minimizing runoff and the discharge of pollutants from exposed areas of the site. Placement of structural practices in floodplains will be avoided to the degree technologically and economically practicable and achievable.

Measure: Erosion control blanket

Implementation: During active construction and in accordance with schedule and contract. Prior to installation, the area should be properly shaped and graded to agree with the design and all rocks and other foreign debris removed from the area. Lime, fertilizer, plantings, and/or seeding should be applied before any matting is installed. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Erosion and undermining at local failures due to poor installation technique or velocities that surpass design velocities is common. Inspect to ensure good ground contact frequently. Repair washouts, breakages, dislocations or failures immediately.

Contractor and PE Note: Add additional measures used during construction.

7.7 Topsoil Conservation

Describe how topsoil will be preserved, if feasible. If conservation of topsoil is infeasible, explain why, and describe alternate methods to be used to insure optimum vegetation survival and growth.

Erosion and sediment control measures for topsoil stockpiles (and other erodible materials) are shown in section 4.4.

□ Conservation of topsoil is Infeasible: .

Reason: Click here to enter text.

Alternate method: Click here to enter text.

□ Conservation of topsoil is Feasible:

Measure: Click here to enter text.

Implementation: Click here to enter text.

Maintenance: Click here to enter text.

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Contractor and PE n Note: Add additional measures used during construction.

c, 7 .8 Minimize Soil Compaction

Minimize soil compaction in areas where final vegetative stabilization will occur and where infiltration practices will be installed.

Measure: Distribute layer of soft vegetative top soil after compaction complete Implementation: After soil compaction is complete and prior to revegetation efforts. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Maximize depth whenever possible and seed as soon as practicable. If seeding cannot occur in a timely manner, other BMPs (nets, blankets, etc.) will be placed to mitigate eros10n.

Contractor and PE Note: Add additional measures used during construction.

7 .9 Storm Drain Inlets and Culvert Inlets

Applicable for stormwater drain inlets which are connected to separate storm sewer systems (usually in urban locations) AND for culvert inlets that discharge stormwater from the project into surface waters.

Locations and design specifications of BMPs are shown on the erosion and sediment control plan sheets in TAB 6.

~ Not applicable to this project. Reason: There are no stormwater drain inlets which are connected to separate storm sewer systems at any of the ERFO Repair Sites

7.10 Constructed Stormwater Conveyance Channels and Culvert Outlets

Describe velocity dissipation and/or erosion control devices to be installed at stormwater conveyance channels (such as roadside ditches) and culvert outlets. Includes permanent and temporary devices (specify).

Velocity dissipation devices will be placed at discharge locations and along the length of any outfall channel to provide a non-erosive flow velocity from the structure to a water course so that the natural physical and biological characteristics and functions are maintained and protected (e.g., no significant changes in the hydrological regime of the receiving water).

Locations and design specifications of BMPs are shown on the erosion and sediment control plan sheets in TAB 6.

Measure: Fiber Roll Check Dams Implementation: Following ditch construction. Where temporary or permanent channels are not yet vegetated, channel lining is infeasible and, therefore, velocity checks are required. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Regular inspections should be made to ensure that the center of the dam is lower

[25] than the edges. Sediment will be removed from check dams before deposits reach 50% of the above ground height. Check dams will not be removed until vegetation is satisfactorily established.

Contractor and PE Note: Add additional measures used during construction.

7.11 Sediment Basins

If applicable, provide site design specifications and other details for design of sediment basins and ponds. This may also include sediment infiltration swales.

Locations and design specifications of BMPs are shown on the erosion and sediment control plan sheets in TAB 6.

At a minimum, sediment ponds must provide storage for either the calculated volume of runoff from the 2-year, 24-hour storm event or 3,600 cubic feet per acre drained. Sediment ponds must also use outlet structures that withdraw water from the surface, unless infeasible.

IZI Not applicable to this project.

7.12 Chemical Treatment

If chemical sediment control (such as polymers) will be used, provide design specifications and other details considered when choosing treatment type and locations.

IZI Not applicable to this project.

If applicable:

NOTE: If use of cationic treatment chemicals is planned, separate prior approval is required from EPA.

7.13 Dewatering Practices

Discharge of ground water or accumulated stormwater that is removed from excavations, trenches, foundations, etc. into surface waters is prohibited unless such waters are first .

effectively managed by appropriate sediment controls. Uncontaminated non-turbid dewatering water can be discharge without being routed to a control.

IZI Not applicable to this project

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7.14 Erosion Control and Stabilization

Commence temporary soil stabilization measures immediately if no further disturbance of an area of the site or stockpile is expected within the next 14 days. Complete temporary soil stabilization measures to disturbed sites or stockpiles within 14 days of last disturbance. Provide for temporary stabilization of all exposed soil prior to winter construction shut down, Specify whether stabilization measure is temporary or permanent.

~ Temporary Measures:

Measure: Revegetation with contractor-approved seed mix Implementation: In places where exposed soil surfaces are not to be fine-graded for periods longer than 30 days. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Frequent inspections until proper vegetative establishment has been made.

~ Permanent Measures:

Measure: Revegetation with contractor-approved seed mix Implementation: In disturbed areas where permanent, long-lived vegetative cover is needed to stabilize the soil. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Frequent inspections until proper vegetative establishment has been made.

Contractor and PE…