SWPPP_Elk_Lake_Road _MT_BEAVERHEAD_273(1)_Beaverhead_County _Montana.pdf

Table of

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

TABS: Maps

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

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

TAB 8: SWPPP Amendment Log

TAB 9: Erosion/Sediment Control Inspection Reports and Requirements

TAB 10: Corrective Action Log

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

TAB 12: Training Log

TAB 13: Waste and/or Borrow Site Information

TAB 14: Grading and Stabilization .Log

TAB 15: Hazardous Spill Plan

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

TAB 17: NPDES Quality Assurance Checklist

TAB 18: NPDES Notice of Termination (NOT)

Tab 1

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.

AGENCY USE ONLY

PERMIT NO.: Rec'd By:

WATER PROTECTION BUREAU

FORM

SWPPP Storm Water Pollution Prevention Plan (SWPPP) Form Storm Water Discharge Associated With Construction Activity

MTRlOOOOO READ THIS BEFORE COMPLETING FORM: This SWPPP Form is intended to assist operators in developing a SWPPP which complies with Part 3 of the General Permit. Before completing this fonn all parties need to read and be familiar with the General Permit, particularly Part 3, as this SWPPP Form is organized based on these Part 3 requirements. In the items to be completed on this form, references to the corresponding relevant "part" of the General Permit are indicated in italicized parenthesis. It is the permittee's responsibility to ensure all required items in the General Permit are adequately addressed, and that the SWPPP is developed, implemented, and maintained. Additional information will need to supplement this SWPPP Form in order to meet these requirements. An up-to-date field copy of the SWPPP must be maintained at the construction activity site by the SWPPP Administrator as required in Part 3 of the General Permit. Sections B and Con this SWPPP Form must state information exactly the same as that indicated on the NOI Form. Attach additional pages as necessary with the corresponding item number on this form indicated. For coverage under the General Permit to be valid upon the submittal of a NOI Package, the NOI Package must include a complete NOI Form?

SWPPP, and fee. Do not submit these items separately. The 2012 General Permit, this SWPPP Form, a Perin it Fee Summary, and related forms are available from the Storm Water Program at (406) 444-3080 or htt ://de .mt. ov/w info/m des/stormwaterconstruction.mc x Section A - SWPPP Status (Check one):

IZJ New No prior SWPPP submitted for this site.

D Modification Permit Number: MTRl 0 _ (Please specify these four numbers)

Section B - Facility or Site Information:

Site Name Elk Lake Road

Site Location Start (latitude 44.615903 N and longitude 111.651325 W) End (latitude 44.652019N and longitude 111.657403W)

Nearest City or Town Lima

Beaverhead

Section C - Applicant (Owner/Operator) Information:

0 0 t N Federal Highway Administration, Western Federal Lands Highway Division (FHWA-WFLHD) wneror peraor ame.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-

Mailina Address 610 East Fifth Street C>

City, State, and Zip Vancouver, Washington 98661

Phone Number 35o..s19-7so3

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Section D - SWPPP Administrator Primary:

Name and Title or Position Title Stephen Morrow, Senior Environmental Protection Specialist Mailing Address _s1_o_E_a_st_F_ift_h_S_tre_e_1 __________________________ _

City, State, and Zip Code _v_an_c_ou_v_e_r,_W._'A._9_8_66_1 _______________________ _

Phone 360·619•7700 Alternate Phone Phone Other Phone Email stephen.morrow@dot.gov

Secondary:

Name and Title or Position Title---------------------------

Mailing Address-------------------------------- City, State, and Zip Code----------------------------- Phone Alternate Phone _____ ,MT Phone _____ Other Phone ____ _

Email Alternate Email ---------------

The SWPPP Administrator must check all of the following boxes confirming SWPPP responsibilities and qualifications based on the General Permit in order to utilize this SWPPP Form:

[{]Yes D No Delegation of Authority Form in Attachment A completed as necessary for new or added

SWPPP Administrators which are not specified on the NOi Form (parts 3.2. and 4.15.);

0 Yes D No SWPPP Administrator Training Form in Attachment B completed and to be kept updated

(Part 3.2.);

0 Yes D No SWPPP Site Map(s) and/or Plan(s) is attached including all required items (Part 35);

0 Yes D No The SWPPP Administrator will ensure the following log sheet summaries and/or attachments are completed and updated/maintained at the construction site for the following attachments based on the requirements in the General Permit:

• SWPPP Revision/Update Summary Log in Attachment C (Parts 2.4. and 3.12.);

• Self-Inspection Fonns in Attachment D for all self-inspections performed (Parts 2.3. and 2.4.); and e BMP design, installation, implementation, and maintenance specifications (Part 3. 7.) (these are not required to be submitted to the Department with the SWPPP included in the original NOl Package, but these must be maintained at all times with the SWPPP Administrator's field copy of the SWPPP at the construction site).

Section E- Construction Activity and BMP Schedule and Phasing (Part 3.3)

In the space below, indicate how many phases the construction activity will consist of (i.e., one, two, etc.):_on_e ______ _ For the phases identified above, if more than one, describe the relationship between the construction phases and describe what major activities will occur during each phase:

NIA

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3. Provide an estimate of the total area of the site, and an estimate of the area of the site expected to undergo construction-related disturbance (including all construction-related support activities)(Part 3.4.3. ); this information must match the information provided on the NOI Form:

Total Site Area (acres): _24_.4 ___ _

Area of Construction-Related Disturbance (acres): 14.7 ------

4. Describe the character and erodibility of soil(s) and other earth material to be disturbed at the site, including cut/fill material to be used (Part 3.4.4.):

The K Factor is an index which quantifies the relative susceptibility of the soil to sheet and rill erosion. K Factor values range from .02 for the least erodible soils to .64 for the most erodible soils. Soils in Elk Lake Road project area range from K 0.20 - K 0.43, having a moderate chance of erodibility.

858-Tibson gravelly loam, 1 to 4 percent slopes, stream terraces Tibson K (0.28) 886A-Regulus, frequently ponded-Crookedrun complex, 0 to 2 percent slopes Regulus, frequently ponded K (0.28); Crookedrun K (0.37) 9268-Dutchhollow-Regulus-Crookedrun complex, O to 2 percent slopes, frequently flooded Dutchhollow, frequently flooded K (0.28); Regulus, frequently flooded K (0.43); Crookedrun, frequently flooded K (0.37) 980A-Tepete, frequently ponded-Foolhen, frequently flooded complex, 0 to 2 percent slopes epete, frequently ponded K (N/A) ; Foolhen, frequently flooded K (0.2) 981A-Regulus, frequently ponded-Sandrift complex, 0 to 1 percent slopes Regulus, frequently ponded K (0.28 ); Sandrift K (0.28) 10078-Tepete-Regulus-Tepete, frequently ponded complex, 1to3 percent slopes Tepete K (N/A); Regulus K (0.28); Tepete, frequently ponded K (N/A)

5. For a storm water discharge associated with construction activity with construction-related disturbance of five acres or more of total land area (based on the acreage provided in item F.3. above)(Part 3.4.5.):

a. Provide an estimate of the runoff coefficient of the site, both before and after construction, and describe what supporting information this determination is based upon:

Runoff coefficient before construction: 0.48 ------ Runoff coefficient after construction: 0.48 ------ Supporting Information Source:

20.3 ac Site with 7.25 acres of gravel before improvements and 7.12 acres of gravel after improvements. Assuming C of

0.3 for unimproved area and 0.8 for gravel area per Beaverhead County Drainage criteria, Composite C's for pre- and post development = 0.48.

b. Provide an estimate of the increase in impervious area after the construction activity identified on the NOI form is completed (example, 20 acres of total ground disturbance and I 0 acres of constructed impervious parking and rooftop areas on previously undisturbed ground would be a 10/20 = 50 percent increase):

-2% Percent.

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6. In the Outfall Sheet table below, describe the names ofreceiving state surface waters and a description of the size, type, and location of each point source discharge or outfall. Use these same outfall locations and numbers on the SWPPP site map(s). Use the same respective outfall numbers as identified in Section G on the submitted NOi Form. If there is no distinguishable point source discharge or outfall to the receiving state surface waters, a description of storm water runoff flow and drainage patterns into the receiving state surface waters must be provided. This must specify if discharges are to unnamed drainages and provide the name of the first named drainage that will receive that discharge down gradient of the site. If the discharge is to a municipal separate storm sewer, enter the location of any stonn sewer discharge into receiving state surface waters. (Part 3.4.6.)

Outfall Sheet (detailed outfall and receiving surface water information) (Part 3.4.6.)

Outfall Number

Size (approximate acreage from site drained)

Red Rock

Type Discharge To (open Municipal channel, Storm Sewer pipe, inlet, (Yes/No, ifyes sheer flow, provide location of other· discharge (latitude specify) & loni:dtude))

Creek basin Open

37.5 sq-mi.

No t:IK ::;pnngs Creek basin Open

19.7 sq-mi.

No

003 iN/A

004 N/A

CMPsto No Red Rock Creek

CMPsto No Elk Springs Creek

Describe Flowpath (from outfall to named receiving surface water if outfall docs not discharge directly into the named receiving surface water, include unnamed drainages)

Direct discharge

Direct discharge

Diffuse flow from CMP to Red Rock Creek

Receiving Surface Water (first named drainage downgradient from site)

Upper Red Rock Lake

Swan Lake

Upper Red Rock Lake

Diffuse flow from CMP to Elk Springs Creek Swan Lake

FOR ADDITIONAL OUTFALLS, ADD ADDITIONAL COPIES OF THIS OUTFALL SHEET (will need to delete or renumber the "Outfall Number" column; on second sheet renumber next outfall as "010'', and so forth; do not use the t same outfall numbers twice)

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7. Provide a brief description of the existing vegetation at the site and an estimate of the percent density of vegetative ground cover (Part 3.4. 7.)

Vegetation in the project area amounts to approximately 9.42 acres composed of: Alpine-Montane Wet Meadow 2.56 acres, Rocky Mountain Lower Montane-Foothill Riparian Woodland and Shrubland 1.36 acres, Emergent Marsh 0.04 acres, Montane Sagebrush Steppe 3.99 acres, and Rocky Mountain Subalpine-Montane Mesic Meadow 1.47 acres (ac)

Specify Percent Density of Existing Vegetation: Density 85-100%

Section G - Site Map (Part 3.5.)

Attach the required SWPPP site maps or plans to this SWPPP Form. The site maps or plans must clearly indicate all the required information in Part 3.5. of the General Permit. This means SWPPP site maps must be of sufficient size, scale, and legibility. This cannot be accomplished on standard USGS topographic maps like those required to be attached to the NOi Form. For most construction projects, in order to accommodate all required inclusions, a series of site maps is necessary and recommended as this information cannot be legibly and completely shown on one map. One map could show the undeveloped site and its current features. An additional map or maps can be developed to show the developed site or, for more complicated sites, show the major phases of development. All information on the attached SWPPP site maps must correlate with the information and identifying names provided on this SWPPP Form, such as identifying "Outfall 001" by that name on the site map.

Section H - Identification and Summary of Potential Pollutant Sources (Part 3.6.)

At a minimum, each of the following sources and activities must be evaluated for the potential to contribute pollutants to storm water discharges:

1. All disturbed and stored soils.

Any disturbed soils or stored soils could be potentially polluted by wind and water erosion into adjacent drainageway.

2. Vehicle tracking of sediments.

Vehicles have potential to transport sediment into waterways. Vehicles will be driving on gravel roads before leaving the site. The contractor will provide a vehicle tracking pad if necessary.

3. Vehicle trucking of sediments.

Vehicle trucking of construction soils have the potential to transport sediment into waterways. Unsuitable fill material for road grading and compaction will be stored on-site, scarified, and placed on embankments.

4. Management of contaminated soils.

Potential for spills and seepage into adjacent waterways. No contaminated soils are anticipated; however, should a spill occur that results in contaminated soils, those soils will be be hauled offsite.

5. Loading and unloading operations.

Potential for spills or containment issues. To be determined by the contractor.

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6. Outdoor storage activities (building materials, fertilizers, chemicals, etc.).

Potential for spills and containment issues. Materials will be handled and stored in compliance with MSDS.

7. Significant dust or paiticulate generation.

Wlnd and construction vehicles have potential to create dust or particulate. The contractor will suppress dust from stockpile soils with water as needed.

8. Vehicle and equipment maintenance and fueling.

Potential for spill and containment issues. BMPs will be determined by contractor.

9. Routine maintenance activities involving fuels, oils, solvents, pesticides, herbicides, fertilizers, detergents, etc.

Potential for spill and containment issues. Compliance with MSDS and BMPs would be implemented to contain spills.

10. On-site waste management practices (waste piles, liquid wastes. dumpsters, etc.).

Potential for spill and containment issues. Compliance with MSDS and BMPs would be implemented to contain spills.

11. Concrete truck and equipment washing.

Concrete truck and equipment washing is not anticipated as part of this project. Should they be used, there would be potential spill and containment issues. Compliance with MSDS and BMPs would be implemented to contain spills. A concrete washout will be provided if concrete operations occur on-site.

12. Dedicated asphalt and concrete batch plants.

Asphalt and concrete batch plants are not anticipated for the project. Potential spill and containment issues. Compliance with MSDS and BMPs would be implemented to contain spills.

13. Non-industrial waste sources such as worker trash and portabletoilets.

Spill and containment issues. Compliance with MSDS and BMPs would be implemented to contain spills.

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14. Other non-storm water discharges if present (as identified in the table below or otherwise).

Identify if any of the following allowable non-storm water discharges are to be present at your site based on Part 1.1.3. of the General Pennit:

Type of Allowable Non-Storm Water Discharne Likely to be Present at the Construction Site?

Uncontaminated condensate from air conditioners, coolers, 0Ycs [{]No and other compressors and from the outside storage of refrigerated gases or liquids Irrigation drainage 0Ycs [{]No Landscape watering provided all pesticides, herbicides, and

Oves [{]No fertilizer have been applied in accordance with the approved labeling Pavement wash waters where no detergents are used and no spills or leaks of toxic or hazardous materials have occurred

0Yes [{]No (unless all spilled material has been removed)

Routine external building wash down that does not use Ovcs [{]No detergents

Uncontaminated ground water or spring water [Z]ves No

Water used to control dust [{]Yes 0No

Discharges from emergency fire-fighting activities Yes [{]No

Foundation or footing drains where flows are not 0Ycs [{]No contaminated with process materials

Incidental windblown mist from cooling towers that collects on rooftops or adjacent portions of the facility, but not

Ovcs [{]No intentional discharges from the cooling tower (e.g., "piped" cooling tower blowdown or drains)

15. Other areas or procedures where potential spills can occur.

Areas where construction equipment is stored or where construction equipment is being used.

16. Other potential pollutant sources not identified above.

No other known potential pollutant sources.

Section I - Description of Best Management Practices (BMPs) (Part 3. 7.)

To complete this properly and adequately, you must refer to the specific BMP requirements in Part 3. 7, and the applicable and pertinent effluent limits in Part 2.1, of the General Permit. The items in Section I.2. of this SWPPP Form are listed in the order these items appear in Part 3. 7. of the General Permit. The BMPs specified below in the SWPPP must clearly describe how compliance with these permit conditions will be achieved. The BMP descriptions below must address all of the potential pollutant sources stated in Part 3.6 of the General Permit and in Section Hof this SWPPP Form.

For structural or other BMPs where the BMP is depending on a technical reference source for BMP design, installation, implementation, and maintenance specifications, you must provide the reference source and respective BMPs in the table in Section I. I. below. For those BMPs which are listed in the completed table below, the referenced specifications must be maintained on-site with the working up-to-date field copy of this SWPPP Fonn and associated SWPPP site maps. When this SWPPP Form is submitted to the Department as a part of the NOi Package, do not submit these specifications for Department records. If the technical reference source does not completely address all specifications associated with the design, installation, im lementation, and maintenance, then this must be addressed in Section 1.2. below.

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For BMPs where you do not specify a technical reference source below, applicable design, installation, implementation, and maintenance specifications must be described and addressed in Section I.2. below.

1. In the following table, provide the reference source(s) to be used for these specifications, and indicate the associated BMPs which were obtained for each.

BMP S .fi S /R fi Sh >pec1 1cat1on ource e erences eet

Source BMP Specification Reference Source Specific BMPs For Which This Number (name, publisher, date, page number(s), website

Reference Source Was Used address, etc.)

W157-21 Fiber Roll, FHWA-WFLHD, 1012014 -Culvert inlet/outlet sediment barrier http://flh.fhwa.dot.gov/resources/standard/wfl/ -Clearing limits perimeter control

Std157-1 Silt Fence, FHWA, 0612004 -Staging area perimeter control http://flh.fhwa.dot.gov/resources/standard/#fp157 -Wetland perimeter control

FOR ADDITIONAL SOURCES/REFERENCES, ADD COPIES OF THIS BMP SPECIFICATION SHEET

(do not use the same source number twice).

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2. Describe all BMPs which will be used at the construction project based on Part 3.7, and Part 2.1, of the General Permit. This description can generally address a type of BMP if that BMP is to be used more than once, but the specific BMP and their respective locations must still be provided on the Construction Phase Sheets provided in Section E of this SWPPP Form, and on the SWPPP site maps and/or plans provided in Section G of this SWPPP Form. All potential pollutant sources in Section H must be addressed with corresponding BMPs in this item regardless of whether the BMP description is dependent on a reference source listed in Section I.1.

Fiber rolls and fiber logs will be utilized throughout the project as depicted on the Construction plans. This BMP will be used as a sediment barrier at culvert inleUoutlets and for perimeter control of disturbed areas.

This BMP addresses the following potential sources of pollutants:

(H1) All disturbed and stored soils (H3) Vehicle trucking of sediments

Silt fence will be utilized for perimeter control of the staging area and wetlands adjacent to the Red Rock Creek and Elk Springs Creek crossings. This BMP addresses the following potential sources of pollutants:

(H1) All disturbed and stored soils (H5) Loading and unloading operations (H6) Outdoor storage activities

Contractor to provide additional BMPs for H2, H4, H7, HS, H9, H10, H11, H12, H13

FOR ADDITIONAL BMPS, ADD COPIES OF THIS SHEET

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Non-Structural BMPs for Erosion and Sediment Control Sheet

b. Non-Structural BMPs for Erosion and Sediment Control (Part 3.7.2.). Describe what BMPs are going to be utilized at the site. Describe how each of the BMPs will address the specific criteria stated in Parts 2.1.1., 2.1.2., and 2.1.4. of the General Permit as applicable and relevant.

Non-structural BMPs to be utilized at the site include temporary and permanent vegetation. The application of a seed mix within disturbed areas will performed upon completion of work. The ditches and slopes will be protected with seeding, and some velocity protection measures will be installed at culvert outlets as described in Section 12.

FOR ADDITIONAL NON-STRUCTURAL BMPS, ADD COPIES OF THIS NON-STRUCTURAL SHEET

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g. Stabilization Measures (Part 3. 7. 7. ). Describe specific vegetative and/or non-vegetative practices that will be used to achieve temporary and final stabilization on the exposed portions of the site. Describe how each of the BMPs will address the specific criteria stated in Parts 2.1.1. and 2.1.2. of the General Permit as applicable and relevant. Be specific and not general, and be sure to address any design, installation, and maintenance protocol as applicable and pertinent to the BMPs.

Stabilization measures of exposed areas will be implemented. When a soil~isturbing activity is completed within a portion of the proposed project, permanent measures (such as seeding) will be implemented within 14 days to protect finished slopes and ditches. If construction temporarily ceases in an area that has been disturbed, then temporary measures (placement of fiber rolls or barrier wrap) will be implemented within 14 days to protect any disturbed areas.

Native seed mix will be provided by the National Wildlife Refuge. The contractor will perform the initial application with any other specifications, such as application of mulch or other materials. Monitoring of the revegetated areas, including supplemental applications of seed, will be performed by the Refuge as necessary to ensure planting success.

h. Minimize Ground Disturbance (Part 3. 7.8.). Describe measures to be taken to minimize ground disturbance and preserve pre-existing stabilization measures of earth material as much as possible. Describe how these BMPs will address the specific criteria stated in Part 2.1.1. of the General Permit as applicable and relevant.

In order to minimize ground disturbance, the total area to be grubbed and graded will be limited to eight acres of exposed soils at any one time, and will not extend beyond the project limits.

Equipment will be confined to the project's construction limits and vegetation removal will be avoided to the maximum extent practicable. Filter fabric will be installed at stream crossings to prevent debris from entering streams, or other areas that are not to be disturbed.

1. Ground Water Dewatering (Part 3. 7.9.). Describe BMPs and locations used for ground water dewatering at the site. Describe how these BMPs will address the specific criteria stated in Part 2.1.3. of the General Permit as applicable and relevant. For discharges of ground water due to dewatering practices which will not discharge to state surface waters, be sure to address any design, installation, and maintenance protocol as applicable and pertinent to the BMPs.

Ground water dewatering is not anticipated for this project, therefore no BMPs for dewatering will be implemented at the site.

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Section K- Post-Construction Storm Water Management (Part 3.9.)

Describe any BMPs which are to be used to control storm water and potential pollutants in storm water discharges that will occur after construction operations have been completed at the site, including any applicable local requirements.

To be completed by the Contractor

Section L Inspection and BMP Maintenance Procedures (Part 3.10.)

Identify and clearly describe the inspection and maintenance procedures implemented at the site to maintain all erosion and sediment control and other BMPs identified in the SWPPP, in good and effective operating condition. These documented procedures must comply with the inspection requirements in Part 2.3. of this permit (also refer to Parts 2. 3.5., 2.4., 3.3., and 3. 7. of the permit for related BMP maintenance requirements).

Inspections will be conducted at least once every 7 calendar days.

Other schedule as allowed by State NPDES Permit.

Inspection frequency may be reduced to at least once every month if:

• The entire site is temporarily stabilized, •Runoff is unlikely due to winter conditions (e.g., site is covered with snow, ice, or the ground is frozen), or

• Construction is occurring during seasonal arid periods in arid areas and semi-arid areas

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All Permittees Must Complete the Following Certification:

1 certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information; including the possibility of fine and imprisonment for knowing violations. [75-5-

633, MCA]

A. Name (Type or Print) Steve Morrow

n. Title (Type or Print) Senior Environmental Protection Specialist

D. Signature

C. Phone No.

360-619-7700

The Department will n t process this form until all of the requested information is supplied, and the appropriate fees are paid. Return this form and the applicable fee to:

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Department of Environmental Quality Water Protection Bureau

PO Box 20090 I Helena, MT 59620-0901

(406) 444-3080

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GENERAL PERMIT FOR STORM WATER DISCHARGES

ASSOCIATED WITH CONSTRUCTION ACTIVITY

PERMIT NUMBER MTR100000

MONTANA DEPARTMENT

OF ENVIRONMENTAL QUALITY

AUTHORIZATION TO DlSCHARGE UNDER

THE MONTANA POLLUTANT DISCHARGE ELIMINATION SYSTEM

In compliance with Section 75-5-101 et seq., Montana Codes Annotated (MCA), Administrative Rules of Montana (ARM) 17.30.1301 et seq., and ARM 17.30.1101 et seq., owners and operators (permittees) with authorization under this "General Permit for Storm Water Discharges Associated with Construction Activity" (permit) are authorized to discharge storm water in accordance with the conditions set forth in Parts 1, 2, 3, 4, and 5 of this permit.

This permit shall become effective January 1, 2013.

This permit and the authorization to discharge shall expire at midnight, December 31, 2017.

FOR THE MONTANA DEPARTMENT OF

~MENTbA~~U=A=L:IT~Y"'-------- Paul Skubinna, Program Manager Water Quality Discharge Permit Section Water Protection Bureau Permitting & Compliance Division

Issuance date: Oc..tober ~ ;)O I J--

Permit No. MTR100000

3.4. Site Description ......................................................................................................... w

3.5. Site Map

3.6. Identification and Summary of Potential Pollutant Sources

3.7. Description of Best Management Practices (BMPs) ............................................. :

3.7.1. Structural BMPs for Erosion and Sediment Control

3.7.2. Non-Structural BMPs for Erosion and Sediment Control

3.7.3. Materials Handling

3.7.4. Dedicated Concrete or Asphalt Batch Plants

3.7 .5. Vehicle Tracking Control

3.7.6. Waste Management and Disposal, Including Concrete Washout

3.7.7. Stabilization Measures

3.7.8. Minimize Ground Disturbance

3.7.9. Ground Water Dewatering

3.7.10. Operational Controls

3.7.lL Spill Prevention and Response Procedures

3.7 .12. Off-Site Vehicle Trucking of Sediment

3.7.13. Local Sediment and Erosion Control Requirements

3.8. Final Stabilization

3.9. Post-Construction Storm Water Management

3.10. Inspection and BMP Maintenance Procedures ................................................ ,

3.11. Water Quality Controls for Discharges to Impaired Waterbodies

3.12. SWPPP Revisions and Updates

4. STANDARD CONDIT!ONS ....... :

4.1. Duty to Comply

4.2. Duty to Reapply

4.3. Need to Halt or Reduce Activity Not a Defense

4.4. Duty to Mitigate

.4.5. Proper Operation and Maintenance

4.6. Permit Actions

4.7. Property Rights

4.8. Duty to Provide lnformation

4.9. Inspection and Entry

4.10. Monitoring and Records-Representative Sampling

4.11. Monitoring and Records-Retention of Records

4.12. Monitoring and Records-Records Contents

4.13. Mo'nitoring and Records-Test Procedures

4.14. Monitoring and Records-Falsification and Tampering ....................... :

4.15. Signatory Requirement

4.16. Reporting Requirements-Planned Changes .......................... ;

4.17. Reporting Requirements-Anticipated Noncompliance

4.18. Reporting Requirements-Transfers

4,19. Reporting Requirements-Monitoring Reports

4.20. Reporting Requirements-Compliance Schedules

1. COVERAGE UNDER THIS PERMIT

1.1. Eligibility

1.1.1. Construction Activities Covered

This Permit applies to all areas of the State of Montana, except for Indian Reservations. This permit applies to "storm water discharge associated with construction activity," as defined in ARM 17.30.1102 {28) and Part 5 of this permit.

A "storm water discharge associated with construction activity" regulated under this permit is determined by meeting both of the following two criteria: ·

• There are areas of ground disturbance or other potential pollutant sources due to the construction activity where a storm water discharge to state surface waters can occur.

• The construction activity has a total area of ground disturbance through clearing, excavating, grading, or placement/removal of earth material which is equal to or greater than one acre. The "total area" must include all areas which are part of a "larger common plan of development or sale", as defined in Part 5 of this permit.

Determination of the acreage of disturbance does not typically include disturbance for routine maintenance activities on existing roads where the line and grade of the road is not being altered, nor does it include the paving of existing roads.

In determining the above potential for a "storm water discharge associated with construction activity" based on the acreage of ground disturbance and discharge potential to state surface waters, additional factors the permittee must consider can include the following:

• all potential drainage/discharge conditions and flow patterns, and their variation during the different phases of the construction activity;

• all potential rainfall or snowmelt events and their unpredictability over time (such as experiencing a relatively higher rainfall or snowmelt amount in a relatively shorter time period);

• support activities for the construction project which may be on or off the conventional construction project "site" (as defined in Part 5 of this permit);

• storm water discharges must typically be regulated beyond the conventional construction earthwork and building phases, lasting from the initiation of construction-related ground disturbance to "final stabilization" {as defined in Part 5 of this permit) of that disturbance, which can sometimes take significant extra time to achieve;

• the term "state surface waters" ("surface waters" is defined in Part 5 of this permit) includes more than just the conventionally-recognized perennial (year-round) or seasonal waterbodies, as the term can typically include most swales, coulees, gulches, ditches, and other channels when water is flowing in them, resulting in a higher and likely discharge potential to state surface waters from the site regardless of location; and

• storm water which discharges into a drain inlet and/or storm sewer system from the site is regulated as a discharge to state surface waters if the inlet or system itself ultimately discharges into a state surface water. ·

Support activities can include, but are not limited to, areas used for access-related work, earth material borrow areas, equipment staging areas, materials storage areas, temporary concrete or asphalt batch plants, and any areas used for fill placement. For storm water discharges from

·Permit No. MTR100000 support activities to be covered under this permit for a particular construction activity permit authorization, such_ support activities must:

• Not be part of a larger commercial operation serving multiple unrelated construction activities. and not continue operation beyond the completion of the particular construction activity; and

• Have appropriate controls and measures identified for the particular support activity, including required documentation. in the Storm Water Pollution Prevention Plan (SWPPP) required in Part 3 of this permit

1.1.2. Allowable Storm Water Discharges

Unless otherwise made ineligible through the provisions in Part 1.1.3. below, the fallowing discharges are eligible for coverage under this permit:

• Storm water discharges associated with construction activity as defined in ARM 17 .30.1102(28) and Part 5 of this permit

• Discharges that are not otherwise required to obtain MPDES permit authorization but are commingled with discharges that are regulated under this permit;

1.1.3. Allowable Non-Storm Water Discharges

The following are non-storm water discharges allowed under this permit:

• Uncontaminated condensate from air conditioners, coolers, and other compressors and from the outside storage of refrigerated gases or liquids;

• Irrigation drainage;

• Landscape watering provided all pesticides, herbicides, and fertilizer have been applied in accordance with the approved labeling;

• Pavement wash waters where no detergents are used and no spills or leaks of toxic or hazardous materials have occurred (unless all spilled material has been removed);

• Routine external building wash down that does not use detergents;

• Uncontaminated ground water or spring water;

• Water used to control dust;

• Discharges from emergency fire-fighting activities;

• Foundation or footing drains where flows are not contaminated with process materials;

and

• Incidental windblown mist from cooling towers that collects an rooftops or adjacent portions of the facility, but not intentional discharges from the coaling tower (e.g., "piped" cooling tower blowdown or drains).

1.1.4. Limitations on Coverage

The following dischargers are not eligible for coverage under this permit:

• Storm water discharges that are mixed with non-storm water, other than those non-storm water discharges listed in Part 1.1.3.;

• Discharges which the Department determines have a reasonable potential to cause, or contribute to, an exceedance of any applicable water quality standard, and the Department has determined authorization under a MPDES Individual Permit is required;

or

Page 11of37

2. EFFLUENT LIMITATIONS AND MONITORING AND

REPORTING REQUIREMENTS

2.1. Non-Numeric Technology-Based Effluent Limits

Permittees must achieve, at a minimum, the following technology-based effluent limitations through the development and implementation of the SWPPP and Best Management Practices (BMPs) required in Part 3 of this permit. The requirements in Part 2.1. of this permit apply in addition to any other state or local requirements, regardless of whether they are more or less stringent

2.1.1. Erosion and Sediment Controls

Design, install, and maintain effective erosion and sediment controls to minimize the discharge of potential pollutants. At a minimum, such controls must be designed, installed and maintained to:

• Control storm water volume and velocity within the slte to minimize soil erosion;

• Control storm water discharges, including both peak flow rates and total storm water volume, to minimize erosion at outlets and to minimize downstream channel and streambank erosion;

• Minimize the amount of soil exposed during construction activity;

• Minimize the disturbance of steep slopes with grades of 15 percent or greater;

• 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); ·

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

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

2.1.2. Soil Stabilization

Stabilization of disturbed areas must, at a minimum, be initiated immediately whenever any clearing, grading, excavating or other earth disturbing activities have permanently ceased on any portion of the site, or temporarily ceased on any portion of the site and will not resume for a period exceeding 14 calendar days.

2.1.3. Dewatering

Discharges from dewatering activities, including discharges from dewatering of trenches and excavations, are prohibited under this permit unless managed by appropriate controls and only if the discharge is not into state surface waters. For those construction dewatering activities which discharge to state surface waters, these discharges cannot be authorized by this particular MPDES permit, but can be authorized under another MPDES permit (typically the MPDES ''General Permit for Construction Dewatering," Permit Number MTG070000).

2.1.4. Pollution Prevention Measures

Design, install, implement, and maintain effective pollution prevention measures to minimize the discharge of pollutants. At a minimum, such measures must be designed, installed, implemented, and maintained to meet the three requirements below.

Page 13 of37

2.2.3. Consistency with Total Maximum Daily Load~Based Waste Load Allocations If a Total Maximum Daily Load (TMDL) has been approved for any impaired waterbody into which the permittee discharges storm water, and the TMDL considered and addressed MPDES regulated storm water discharges, then the Department must incorporate the Waste Load Allocation (WLA}, as applicable, into the discharge permit, as required by 75-5-703, MCA. For a WLA pertaining to an authorization under this permit, compliance with the conditions and requirements in this permit is typically considered adequate in meeting the WLA, unless otherwise notified by the Department.

2.3. Inspections

Inspections must be performed by a SWPPP Administrator as defined in Part 3.2. of this permit.

Site inspections are to be conducted during the construction project's normal working hours and the inspection schedule must be documented in the SWPPP. Site inspections must be performed in accordance with one of the two schedules listed below in Parts 2.3.1. or 2.3.2., unless subject to the schedule in Part 2.3.3. The initial SWPPP submitted with the NOi Package must specify which inspection schedule will be utilized (either Part 2.3.1. or 2.3.2.), and this inspection schedule must be used until final stabilization is achieved for all areas of the construction activity, except for any temporary reduced inspection schedule as allowed in Part

2.3.3. The permittee cannot switch between the inspection schedule options in Parts 2.3.1. and

2.3.2. during the life of the permit authorization.

2.3.1. Weekly Routine Inspections

A SWPPP Administrator must, at a minimum, conduct a routine inspection at least once every 7 calendar days.

2.3.2. Biweekly Routine and Post-Storm Event Inspections

A SWPPP Administrator must, at a minimum, conduct a routine inspection at least once every 14 calendar days, and a post-storm event inspection must be conducted by a SWPPP Administrator within 24 hours of the end of a rainfall event of 0.25 inches or greater, and within 24 hours of snowmelt due to thawing conditions which causes visible surface erosion at the site.

When a post-storm event inspection occurs, this can be credited as a biweekly routine inspection, but the biweekly routine inspections must commence again no later than 14 calendar days after the last pest-storm event inspection.

2.3.3. Reductions In Inspection Frequency

The normal selected inspection schedule stated in Part 2.3.1. or 2.3.2. may be temporarily reduced to a routine inspection every 30 calendar days only if one of the following conditions exists:

• The construction activity at the site is temporarily inactive or shutdown and all areas of disturbance have achieved "temporary stabilization" as defined in Part 5 of the permit; or

• After the permittee has completed earthwork and construction activities at the site and has installed the SWPPP erosion and sediment BMPs necessary to establish final stabilization at a later date.

In either case, all sediment and erosion BMPs must be in place as identified in the SWPPP.

The inspection schedule must be documented in the SWPPP.

Maintenance, repair, replacement, or installation of new BMPs determined necessary during site inspections to address ineffective or inadequate BMPs must be conducted in accordance with Part 2.3.5. of this permit.

2.3.5. BMP Maintenance, Replacement, and Failures

All BMPs identified in the SWPPP must be maintained in effective operating condition. Proper selection and installation of BMPs, and implementation of comprehensive inspection and maintenance procedures, in accordance with the SWPPP, is important to ensure compliance with this permit. BMPs that are not adequately maintained in accordance with good engineering, hydrologic, and pollution control practices, including removal of collected sediment outside the acceptable tolerances of the BMPs, are considered to be no longer operating effectively. If site inspections identify BMPs which are not in effective operating condition.

maintenance must be performed before .the next storm event, to maintain effectiveness.

If existing BMPs need to be modified, or if additional BMPs are necessary for any reason, implementation of these additional measures must be completed before the next storm event.

All changes in the design. implementation, or installation of erosion and sediment control or other BMPs must be documented where applicable in the SWPPP. SWPPP changes must also be summarized in a SWPPP Revision/Update Log as required in Part 3.12.2. of this permit.

2.4. Corrective Actions

Corrective actions are any actions a SWPPP Administrator takes-to:

• Repair, modify, or replace any storm water control used at the site;

• Clean up and dispose of spills, releases, and other deposits found on the site; and

• Remedy a permit violation or noncompliance.

If any of the following conditions occur, a SWPPP Administrator must review and revise the selection, design, installation, implementation, and maintenance of BMPs to ensure the condition is eliminated and will not be repeated in the future.

• An unauthorized release or discharge (e.g., spill, leak, or discharge of non-storm water not authorized by this or another MPDES permit) occurs at the site;

• A SWPPP Administrator or the Department determines that the BMPs are not stringent enough for the discharge as it causes or contributes to an exceedance of applicable water quality standards;

• A SWPPP Administrator or the Department determines that modifications to the BMPs are necessary to meet the non-numeric effluent limits in Part 2.1. of this permit;

• A SWPPP Administrator or the Department determines that the BMPs are not properly designed, installed, operated, and/or maintained; or

• A failure of erosion or sediment controls that results in sediment, solids, or other wastes being lost or discharged from the site. Upon identification of sediment, solids, or other wastes lost or discharged from the site, the material must be cleaned up and placed back on site, or otherwise disposed of in an acceptable manner.

A SWPPP Administrator must document the completed corrective actions in the correspcnding inspection report and document any new or additional BMPs in the SWPPP Revision/Update Log as required in Part 3.12.2. of this permit.

2.5. Record keeping

Permit No. MTR10QQOO

3. SPECIAL CONDITIONS - Storm Water Pollution Prevention Plan (SWPPP)

3.1. SWPPP - General Requirements

3.1.1. The SWPPP must be developed and implemented in accordance with good engineering, hydrologic, and pollution control practices.

3.1.2. The SWPPP must meet the following general objectives:

• Identify and describe site characteristics which affect storm water discharges and the transport of potential pollutants with respect to the particular construction activity;

• Identify and describe all potential pollutant sources which may affect the quality of storm water discharges associated with the construction activity;

• Identify and describe the BMPs to be used to ·reduce potential pollutants in storm water discharges associated with the construction activity and to ensure compliance with the effluent limitations in this permit;

• Identify and describe the measures which will be used to achieve final stabilization;

• Identify and clearly describe the inspection and maintenance procedures implemented at the site to maintain all erosion and sediment control and other BMPs identified in the SWPPP, in good and effective operating condition; and

• Be prepared and updated in accordance with the terms and conditions of this permit.

3.1.3. The SWPPP must be implemented as stated.in the Primary SWPPPAdministrator's up to-date field copy. SWPPP implementation must initiate at the start of ground disturbance associated with the construction activity, and continue until final stabilization of all construction activity-related ground disturbance is achieved and permit coverage has been terminated.

3.2. SWPPP Administrator

3.2.1. SWPPP Administrator - General Requirements

The permittee must specify a Primary SWPPP Administrator(s), a Secondary SWPPP Administrator (as applicable}, and any other designated SWPPP Administrator(s) in the SWPPP. A SWPPP Administrator(s) is an individual or position title who is.responsible for developing, implementing, maintaining, revising, and updating.the SWPPP. The SWPPP Administrator(s) must address all aspects of the SWPPP, initiating with the start of construction activities, and lasting until final stabilization is achieved and the permit authorization is terminated. There can be multiple individuals and/or position titles which serve as a SWPPP Administrator; but a Primary SWPPP Administrator and Secondary SWPPP Administrator (as applicable) must be identified on the NOi Form and in the

SWPPP.

The SWPPP Administrator(s) must have knowledge of the principles and practices of erosion and sediment controls and pollution prevention practices and possess the skills necessary to assess site conditions and determine the effectiveness of selected BMPs.

The knowledge and skills are required so that the quality of storm water discharges are controlled and the effluent limitations in Part 2 of this permit are complied with.

Page 19 of.37 and maintenance of both structural and non-structural storm water BMPs. The SWPPP must identify the BMPs to be implemented during the different project phases.

For the overall construction activity or for each phase of construction activities if multiple phases will occur, the permittee must identify specific components within each of the following categories, including an estimated start date and duration for each component:

3.3.1. Installation of storm water BMPs, and when they will be made operational;

3.3.2. Commencement and duration of earth-disturbing activities, including clearing and grubbing, mass grading, site preparation (such as excavating, cutting, and filling), road· construction, utility and infrastructure installation, final grading, and creation of soil stockpiles requiring stabilization;

3.3.3. Cessation, temporarily or permanently, of construction activities on the site, or in designated portions of the site;

3.3.4. Final or temporary stabilization of areas of exposed and disturbed soil. The completion of stabilization must meet the requirements in Part 2.1.2. of this permit; and

3.3.5. Vertical construction (the construction of structures and buildings);

3.3.6. Removal of temporary storm water conveyances/channels and other temporary storm water control measures and/or BMPs, removal of construction equipment and vehicles, and cessation of any potential pollutant-generating activities due to the construction…