Appendix A - MS4 Permit.pdf

Joint Base Lewis-McChord MS4 Permit No. WAS-026638

Table of Contents

I. Applicability

A. Permit Area

B. Discharges Authorized Under This Permit…………………………………… ………….…4

C. Limitations on Permit Coverage

II. Stormwater Management Program (SWMP) Requirements

A. General Requirements

B. Minimum Control Measures

C. Stormwater Retrofit Report on Reduction of Pollutant Discharges to Impaired Receiving

Waters………………………………………………………………

D. Required Response to Violations of Water Quality Standards

E. Reviewing and Updating the SWMP

F. Transfer of Ownership, Authority, or Responsibility for SWMP Implementation

G. SWMP Resources

III. Schedule for Implementation and Compliance

IV. Monitoring, Recordkeeping, and Reporting Requirements

A. Monitoring

B. Recordkeeping

C. Reporting Requirements

D. Addresses

V. Compliance Responsibilities

A. Duty to Comply

B. Penalties for Violations of Permit Conditions

C. Need to Halt or Reduce Activity not a Defense

D. Duty to Mitigate

E. Proper Operation and Maintenance

F. Bypass of Treatment Facilities

G. Upset Conditions

H. Toxic Pollutants

I. Planned Changes

J. Anticipated Noncompliance

K. Twenty-Four Hour Reporting

L. Other Noncompliance

VI. General Provisions

A. Permit Actions

B. Duty to Reapply

C. Duty to Provide Information

This page modified 12/04/2014

Joint Base Lewis-McChord MS4 Permit No. WAS-026638

D. Other Information

E. Signatory Requirements

F. Availability of Reports

G. Inspection and Entry

H. Property Rights

I. Transfers

J. State/Tribal Environmental Laws

K. Oil and Hazardous Substance Liability

L. Severability

VII. Definitions and Acronyms

Appendix A - Street Waste Disposal…………………………………………………………………………………60

Appendix B - Runoff Treatment Requirements for New Development and Redevelopment Sites………….….. 62

Appendix C -Exemptions from the New Development and Redevelopment Requirements of Part II.B.5……...66

Appendix D -Vicinity Map of JBLM Permit Area………………………………………………………………….69

Joint Base Lewis-McChord MS4 Permit No. WAS-026638

I. Applicability

A. Permit Area. This permit covers all geographic areas of the military installation located within Pierce and Thurston Counties, Washington, which are owned or operated by the Joint Base Lewis-McChord (JBLM), hereafter also referred to as “Permittee.” The Permit Area includes but is not limited to the cantonment areas (comprised of and referred to as JBLM- Main, JBLM-North, and/or JBLM-McChord Field) and all military training areas. See Appendix D.

B. Discharges Authorized Under This Permit. During the effective dates of this permit, the Permittee is authorized to discharge stormwater to waters of the United States and to groundwater of the State of Washington from all portions its municipal separate storm sewer system (MS4) located within the boundaries the Permit Area described in Part I.A, subject to the conditions set forth herein. This permit also authorizes the discharge of flows categorized as allowable non-stormwater discharges in Part I.C.1.d of this permit.

C. Limitations on Permit Coverage

1. Non-Stormwater Discharges. The Permittee is authorized to discharge non-stormwater from the MS4, only where such discharges satisfy one of the following conditions:

a) The non-stormwater discharges are in compliance with a separate NPDES permit;

b) The discharges originate from emergency firefighting activities;

c) The non-stormwater discharges result from a spill and:

• are the result of an unusual and severe weather event where reasonable and prudent measures have been taken to minimize the impact of such discharge; or

• consist of emergency discharges required to prevent imminent threat to human health or severe property damage, provided that reasonable and prudent measures have been taken to minimize the impact of such discharges;

or

d) The non-stormwater discharges consist of one or more flows listed below, and such flows are managed by the Permittee in accordance with Parts II.B.3.c and II.B.6 of this permit.

• potable water sources, including but not limited to, water line flushing, hyperchlorinated water line flushing, fire hydrant flushing, and pipeline hydrostatic test water;

• Landscape watering and other irrigation runoff;

Joint Base Lewis-McChord MS4 Permit No. WAS-026638

• Dechlorinated swimming pool, spa, and hot tub discharges;

• Street and sidewalk wash water, water used to control dust, and routine external building wash down that does not use detergents;

• Diverted stream flows;

• Rising ground waters;

• Uncontaminated ground water infiltration (as defined at 40 CFR 35.2005(20));

• Uncontaminated pumped ground water;

• Foundation drains;

• Air conditioning condensation;

• Irrigation water from agricultural sources that is commingled with urban stormwater;

• Springs;

• Uncontaminated water from crawl space pumps;

• Footing drains; and/or

• Flows from riparian habitats and wetlands.

2. Discharges Threatening Water Quality. The Permittee is not authorized to discharge stormwater that will cause, or have the reasonable potential to cause or contribute to an exceedance above the State of Washington water quality standards [including, but not limited to, those standards contained in Chapters 173-201A (surface water quality), 173-204 (sediment management) and 173-200 (groundwater) of the Washington Administrative Code]. The required response to such exceedances of these standards is defined in Part II.D.

3. Snow Disposal to Receiving Waters. The Permittee is not authorized to dispose of snow directly to waters of the United States or directly to the MS4(s). Discharges from Permittee-owned or operated snow disposal sites, and the Permittee’s snow management practices, are authorized under this permit when such sites/practices are operated using Best Management Practices (BMPs) as required in Part II.B.6. Such BMPs must be designed to prevent pollutants in the runoff and prevent violations of the applicable water quality standards.

4. Stormwater Discharges Associated with Industrial and Construction Activity.

The Permittee is authorized to discharge stormwater associated with industrial and construction activity through the MS4, only when such discharges are otherwise authorized under an appropriate NPDES permit.

II. Stormwater Management Program (SWMP) Requirements

A. General Requirements

1. Implement a SWMP. The Permittee must develop, implement and enforce a Stormwater Management Program (SWMP) designed to reduce the discharge of pollutants from the MS4 to the maximum extent practicable, and protect water quality in receiving waters. The SWMP must be implemented throughout the permit area described in Part I.A.

Joint Base Lewis-McChord MS4 Permit No. WAS-026638

2. Control Discharges of Pollutants from the MS4 to the Maximum Extent

Practicable. The Permittee must comply with the SWMP actions and activities outlined in Parts II.B and II.C, the required response provisions of Part II.D, and the assessment/monitoring requirements described in Part IV. The SWMP actions and activities require the Permittee to use BMPs, control measures, system design, engineering methods, and other provisions appropriate to control discharges of pollutants from the MS4 to the maximum extent practicable.

3. SWMP Document. The Permittee must prepare written documentation of its SWMP no later than July 25, 2016. The SWMP documentation must be organized according to the program components in Parts II.B and II.C, and the assessment/monitoring requirements of Part IV. The SWMP document must be submitted with the subsequent Annual Report, and updated at least annually thereafter. The SWMP document must include:

a) A summary of the legal authorities which enable the Permittee to control discharges to and from the Permittee’s MS4 as required by this Permit;

b) A description of each minimum program control measure in Parts II.B and II.C;

c) Any additional actions implemented by the Permittee pursuant to Parts II.B and II.C; and

d) A description of the monitoring activity pursuant to Part IV.

4. SWMP Information. The Permittee’s SWMP must include an on-going means for gathering, tracking, maintaining, and using information in order to evaluate SWMP development and implementation, permit compliance, and to set priorities.

a) No later than one year from permit effective date, the Permittee must track the cost, or estimated cost, to develop and implement each program component of the SWMP. A summary of costs and funding sources, by program component, must be included in each Annual Report.

b) The Permittee must track the number of inspections, official enforcement actions, types of public education activities, etc., as stipulated by the respective program component. Information summarizing these activities during the previous reporting period must be included in the Annual Report(s).

5. SWMP Modification. Modifications to the SWMP requirements must be made in accordance with Part II.E of this permit.

6. Shared Implementation. Implementation of one or more of the minimum control measures may be shared with, or delegated to, another entity other than the Permittee. The Permittee may rely on another entity only if:

a) The other entity, in fact, implements the control measure;

b) The control measure, or component of that control measure, is at least as stringent as the corresponding permit requirement; and

Joint Base Lewis-McChord MS4 Permit No. WAS-026638

c) The other entity agrees to implement the control measure on the Permittee’s behalf. A binding written acceptance of this obligation is required. The Permittee must maintain this written obligation as part of the SWMP. If the other entity agrees to report on the minimum control measure, the Permittee must supply the other entity with the reporting requirements in Part IV.C of this permit. The Permittee remains responsible for compliance with the permit obligations if the other entity fails to implement the control measure

7. Equivalent Documents, Plans or Programs.

The Permittee may submit to EPA any documents, plans, or programs that the Permittee believes is equivalent to a required SWMP minimum control measure or component specified in this Permit. Such documents, plans or programs must be individually submitted to EPA pursuant to Parts II.E and IV.D for review at least six months prior to the compliance date of the required SWMP minimum control measure or component. If the EPA determines that the Permittee’s document, plan or program is equivalent to the required SWMP minimum control measure or component, EPA will commence a permit modification procedure pursuant to 40 CFR §§122.62 and 124.5 if necessary. In determining whether a permit modification is needed, EPA will look at whether the equivalent document, plan or program needs to be cited in the Permit. As specified in Part VI.A, the filing of a request by the Permittee for a permit modification does not stay any permit condition. The Permittee must submit to EPA as specified in Parts II.E and IV.D the following documentation with each individual request for review:

a) A complete copy of the relevant document, plan or program, (or applicable section of such documentation, provided the Permittee provides the full citation of the source material); and

b) A detailed written overview identifying the required SWMP program component addressed by the submittal, and the reasons, citations and references sufficient to demonstrate that the submitted material meets or exceeds the required SWMP program component.

Joint Base Lewis-McChord MS4 Permit No. WAS-026638

B. Minimum Control Measures. The following minimum control measures must be accomplished through the Permittee’s Stormwater Management Program:

1. Education and Outreach on Stormwater Impacts.

a) Within two years of the effective date of this permit, the Permittee must develop, implement, and evaluate an on-going program to educate targeted audiences about the adverse impacts of stormwater discharges on local water bodies and the steps that they can take to reduce pollutants in stormwater runoff. The Permittee must target its education and outreach program activities to reach the following audiences as appropriate:

• project managers;

• contractors;

• tenants;

• environmental staff; and

• business owners and operators.

b) The primary goal of the education and outreach program is to reduce or eliminate behaviors and practices that cause or contribute to adverse stormwater impacts.

Using the topics listed in Part II. B.1.c, the Permittee may develop a prioritized schedule and plan to reach the target audiences through the on-going education effort.

c) The Permittee must select from the following topics to affect behavior change through its education and outreach program:

• Proper use, storage and disposal of household hazardous waste;

• Proper recycling;

• Appropriate stormwater management practices for commercial, food service, and automotive activities, including carpet cleaners, home-based or mobile businesses;

• Appropriate yard care techniques for protecting water quality, including proper timing and use of fertilizers;

• Proper pet waste management;

• Appropriate spill prevention practices;

• Proper management of street, parking lot, sidewalk, and building wash water;

• Proper methods for using water for dust control;

• Proper design and use of Low Impact Development (LID) techniques at new development and redevelopment sites; and

• Impacts of illicit discharges and how to report them.

Joint Base Lewis-McChord MS4 Permit No. WAS-026638

d) Beginning two years from the effective date of this permit, the Permittee must measure and document the understanding and adoption of the targeted behavior[s] for at least one audience in at least one subject area listed above. The resulting measurements must be used to direct education and outreach resources most effectively through the remainder of the Permit term, The Permittee must evaluate and summarize resulting changes in adoption of the targeted behavior(s). The Permittee may meet this requirement individually or through cooperation with other entities.

e) The Permittee must document the specific education program goals, and track and maintain records of public education and outreach activities in the SWMP document.

2. Public Involvement/Participation.

a) The Permittee must comply with applicable federal, state and local public notice requirements when implementing a public involvement/participation program.

b) Within six months of the effective date of this permit, and at a regular schedule at least annually thereafter, the Permittee must conduct at least one of the following activities within the permit area throughout the permit term:

• Convene meeting(s) with the Environmental Division Chief & Environmental Compliance Program Manager, and/or other JBLM organizations as appropriate, to discuss and coordinate effective SWMP implementation, or

• Convene a JBLM Water Council or organize other means to provide opportunity for the military community to participate in development and implementation of SWMP activities.

c) No later than July 25, 2016, and annually thereafter, the Permittee must make the updated SWMP document required by Part II.A.3 available to the public on the Permittee’s website.

d) At least once per year, the Permittee must provide one or more on-going volunteer activities as practicable to help actively engage residents and personnel at JBLM in understanding water resources and how their activities can affect water quality. In the SWMP document, the Permittee must maintain a log of public participation activities performed.

• Volunteer activities may include, but are not limited to, storm drain stenciling or marking program; establishing a website, email address and/or hotline for citizens to report pollution concerns; establishing a pet waste management program at American Lake or other resource areas.

Joint Base Lewis-McChord MS4 Permit No. WAS-026638

3. Illicit Discharge Detection and Elimination (IDDE).

An illicit discharge is any discharge to a MS4 that is not composed entirely of stormwater as defined in 40 CFR § 122.26(b)(2). The Permittee’s SWMP must include an on-going program to detect and remove illicit connections and discharges into the MS4. The Permittee must include a written description of the program in the SWMP document. No later than 180 days prior to the expiration date of this permit, the Permittee must implement an IDDE program which fully addresses each of the following components:

a) Map of Cantonment Areas. Within two years from the effective date of this permit, the Permittee must update and maintain a map of the MS4 located within the JBLM cantonment area. At a minimum, the cantonment area map must be periodically updated and include the following information:

• jurisdictional boundaries;

• known MS4 outfalls,

• receiving waters, other than groundwater;

• Tributary conveyances for all known MS4 outfalls. The following attributes must be mapped for all known outfalls:

(i) tributary conveyances (type, material and size where known);

(ii) associated drainage areas; and

(iii) land use;

• Stormwater treatment and flow control BMPs/facilities owned, or operated, by the Permittee, including information about type, and design capacity.

• Geographic areas served by the Permittee’s MS4 that do not discharge stormwater to surface waters;

• Points at which the Permittee’s MS4 is interconnected with other MS4s or other storm/surface water conveyances; and

• Locations of all Permittee owned or operated industrial facilities, maintenance/storage facilities and snow disposal sites that discharge directly to the Permittee's MS4, and/or waters of the State.

The Permittee must maintain updated cantonment area MS4 maps. As necessary the Permittee must add data regarding any new connections to the MS4 which are allowed by the Permittee after the effective date of this permit. A copy of the completed MS4 map, as both a report and as an electronic file via Arc GIS compatible format, must be submitted to EPA upon request and as part of the Permit renewal application required in Part IV.B.

Consistent with national security laws and directives, the Permittee must provide mapping information to operators of adjacent regulated MS4s upon request.

Joint Base Lewis-McChord MS4 Permit No. WAS-026638

b) Map of Training Areas. No later than 180 days prior to the expiration date of this permit, the Permittee must develop and submit to EPA a preliminary map identifying the presence of MS4 infrastructure located outside the cantonment area. The Permittee must prioritize the development of a training area MS4 map within the Muck Creek watershed/basin. The map must include the information items listed in Part II.B.3.a. A copy of the preliminary map, as both a report and as an electronic file via Arc GIS compatible format, must be submitted to EPA as part of the permit renewal application required in Part IV.B.

c) Ordinance. The Permittee must effectively prohibit, through ordinance or other regulatory mechanism, all illicit discharges into the MS4 to the maximum extent allowable under the legal authorities of JBLM. The ordinance or regulatory mechanism must be adopted, or existing mechanism amended, to comply with this Permit no later than thirty months from the effective date of this Permit.

The Permittee must implement appropriate enforcement procedures and actions associated with the ordinance or regulatory mechanism, including a written policy of enforcement escalation procedures for recalcitrant or repeat offenders.

Allowable Discharges: The regulatory mechanism does not need to prohibit the following categories of non-stormwater discharges, consistent with Part I.C.1.d:

• Diverted stream flows;

• Rising ground waters;

• Uncontaminated ground water infiltration (as defined at 40 CFR

35.2005(20));

• Uncontaminated pumped ground water;

• Foundation drains;

• Air conditioning condensation;

• Irrigation water from agricultural sources that is commingled with urban stormwater;

• Springs;

• Uncontaminated water from crawl space pumps

• Footing drains;

• Flows from riparian habitats and wetlands;

• Non-stormwater discharges covered by another NPDES permit;

and/or

• Discharges from emergency firefighting activities in accordance with

Part 1.C.b.

Conditionally Allowable Discharges: The regulatory mechanism may allow the following categories of non-stormwater discharges, only if the stated conditions are met:

• Discharges from potable water sources, including but not limited to water line flushing, hyperchlorinated water line flushing, fire hydrant system flushing, and pipeline hydrostatic test water: Planned discharges must be dechlorinated to a total residual chlorine concentration of 0.1 parts per million (ppm) or less, pH-adjusted, if

Joint Base Lewis-McChord MS4 Permit No. WAS-026638 necessary, and volumetrically and velocity controlled to prevent resuspension of sediments in the MS4.

• Discharges from lawn watering and other irrigation runoff: These discharges must be minimized through, at a minimum, public education activities (see Part II.B.2.a) and water conservation efforts.

• Dechlorinated swimming pool, spa, and hot tub discharges: The discharges must be dechlorinated to a total residual chlorine concentration of 0.1 ppm or less, pH-adjusted and reoxygenized if necessary, and volumetrically and velocity controlled to prevent re-suspension of sediments in the MS4. Discharges must be thermally controlled to prevent an increase in temperature of the receiving waters. Swimming pool cleaning wastewater and filter backwash must not be discharged to the MS4.

• Street and sidewalk wash water, water used to control dust, and routine external building wash down that does not use detergents:

The Permittee must reduce these discharges through, at a minimum, public education activities (see Part II.B.2.a ) and/or water conservation efforts. To avoid washing pollutants into the MS4, the Permittee must minimize the amount of street wash and dust control water used. At active construction sites, street sweeping must be performed prior to washing the street.

• Other non-stormwater discharges. The discharges must be in compliance with the requirements of a pollution prevention plan reviewed by the Permittee which addresses control of such discharges.

d) Detection and Elimination. No later than thirty months from the effective date of this permit, the Permittee must develop and implement an on-going program to detect and address non-stormwater discharges, spills, and illicit connections into their MS4. This program must be described within the SWMP document and include:

• Procedures for locating priority areas likely to have illicit discharges, including areas where complaints have been recorded in the past, and areas with storage of large quantities of materials that could result in spills;

• Field assessment activities, including visual inspection of outfalls draining priority areas during dry weather and for the purposes of verifying outfall locations, identifying previously unknown outfalls, and detecting illicit discharges. The dry weather screening activities may include field tests of parameters selected by the Permitee as being indicators of discharge sources. The Permittee may utilize less expensive “field test kits,” and test methods not approved by EPA under 40 CFR Part 136, provided the manufacturer’s published

Joint Base Lewis-McChord MS4 Permit No. WAS-026638 detection ranges are adequate for the illicit discharge detection purposes;

i) No later than thirty months from the effective date of this permit, the Permittee must begin dry weather field screening for non-stormwater flows from stormwater outfalls.

ii) No later than 180 days prior to the permit expiration date, the Permittee must complete field screening of at least 75% of all MS4 outfalls located within the cantonment area;

iii) Screening for illicit connections may be conducted in accordance with Illicit Discharge Detection and Elimination: A

Guidance Manual for Program Development and Technical

Assessments, Center for Watershed Protection, October 2004, or another methodology of comparable effectiveness;

• Procedures for characterizing the nature of, and potential public or environmental threat posed by, any illicit discharges which are found by or reported to the Permittee. Procedures must address the evaluation of whether the discharge must be immediately contained and steps to be taken for containment of the discharge;

i) Compliance with this provision will be achieved by immediately responding to all illicit discharges including spills which are determined to be constitute a threat to human health or the environment; investigating (or referring to the appropriate agency), within seven (7) days, any complaints, reports or monitoring information that indicates a potential illicit discharge, including spills; and immediately investigating (or referring) problems and violations determined to be emergencies or otherwise judged to be urgent or severe;

• Procedures for tracing the source of an illicit discharge; including visual inspections, and when necessary, opening manholes, using mobile cameras, collecting and analyzing water samples, and/or other detailed inspection procedures; and

• Procedures for eliminating the discharge; including notification of appropriate authorities; notification of the responsible operator or organization; technical assistance; follow-up inspections; and escalating enforcement and legal actions if the discharge is not eliminated.

i) Compliance with this provision will be achieved by initiating an investigation within twenty one (21) days of a report or discovery of a suspected illicit connection to determine the source of the connection, the nature and volume of discharge through the connection, and the party responsible for the connection. Upon confirmation of the illicit nature of a storm drain connection, the

Joint Base Lewis-McChord MS4 Permit No. WAS-026638

Permittee must take action in a documented effort to eliminate the illicit connection within forty five (45) days.

e) Tracking. The Permittee must implement a means of program evaluation and assessment which tracks the number and type of illicit discharges identified, dry weather screening efforts, and the location and any remediation efforts to address identified illicit discharges.

f) Education. Within two years from the effective date of this permit, the Permittee must inform employees, businesses, and the general public within the permit area of hazards associated with illegal discharges and improper disposal of waste.

This program must be conducted in concert with the public education requirements outlined in Part II.B.1.

• No later than one year from the effective date of this permit, the Permittee must list and publicize a hotline or other local means for the public and JBLM personnel to report spills and other illicit discharges. The Permittee must maintain a record of calls received and follow-up actions taken in accordance with II.B.3.d above and include a summary in the Annual Report.

g) Training. The Permittee must ensure that all staff responsible for the identification, investigation, termination, clean up and reporting of illicit discharges, including spills and illicit connections, are trained to conduct these activities. Orientation and training concerning the JBLM stormwater management program must be accomplished within the first six months of employment for new staff who work directly on stormwater management issues.

Follow-up training must be provided as necessary to address changes in procedures, techniques or requirements. The Permittee must maintain records of relevant training provided or obtained, and the staff members trained. A summary of this training must be included in each Annual Report.

4. Construction Site Stormwater Runoff Control. Throughout the permit area, the Permittee must implement and enforce a program to reduce pollutants in stormwater runoff to the MS4 from construction activities resulting in land disturbance of greater than or equal to 5,000 square feet or more. The Permittee must include a written description of the construction site runoff control program in the SWMP document. At a minimum the program must include the following components:

a) Oversight. The Permittee must provide adequate direction and oversight to ensure that entities responsible for regulated construction activities within the permit area obtain authorization to discharge as necessary under the NPDES General Permit for Stormwater Discharges for Construction Activity for Federal Facilities in Washington, Permit #WAR12000F (Construction General Permit or

CGP).

b) Ordinance. The Permittee must use an ordinance or other regulatory mechanism available under the legal authorities of JBLM to require erosion and sediment

Joint Base Lewis-McChord MS4 Permit No. WAS-026638 controls, onsite materials management and sanctions to ensure compliance with the terms of the SWMP and the CGP.

c) Enforcement. The Permittee must maintain a list of policies and procedures which can be used to enforce construction site compliance within JBLM independent of EPA staff directly enforcing the CGP. No later than two years from the effective date of this permit, the Permittee must include this list of policies and procedures in the SWMP document, and must update the list as necessary at least annually. The Permittee must summarize in each Annual Report any enforcement actions taken at construction sites during the previous reporting period.

d) Construction Site BMPs. The Permittee must maintain (or incorporate by reference) a list of appropriate construction site BMPs in the SWMP document;

such a list must include associated criteria for maintenance and installation of each specific practice.

e) Contractual Language. The Permittee must work with other responsible organizations to ensure that all Requests For Proposal (RFPs) and construction contracts for new construction projects which will disturb 5,000 square feet or more within the permit area include specifications requiring compliance with the SWMP and, when applicable, the CGP. An example of such contract language must be included within the SWMP document.

f) Pre-construction Site Plan Review. The Permittee must implement procedures for reviewing all pre-construction site plans for potential water quality impacts, appropriate erosion and sediment controls, and appropriate control of other construction site materials. These procedures must include provisions for receipt and consideration of information submitted by the public. Information summarizing the number of site plans reviewed during the previous reporting period must be submitted as part of the corresponding Annual Report.

g) Construction Site Inspection Plan. No later than January 25, 2016, the Permittee must develop and implement a construction site inspection plan. The construction site inspection plan must describe the criteria which triggers a site inspection, and must include a mandatory timeframe within which construction sites meeting the criteria will be inspected by the Permittee’s staff or its representatives.

• The Permittee must develop methods for its staff or representatives to stop work on construction sites deemed to be in non-compliance with the construction site runoff control program.

• The Permittee must develop and utilize a construction site inspection form to document all construction site inspections.

• The written construction site inspection plan, and associated inspection form, must be included in the SWMP document.

• Information summarizing the site inspections conducted by the Permittee during the previous reporting period, including the location

Joint Base Lewis-McChord MS4 Permit No. WAS-026638 and total number of such inspections, must be submitted as part of the corresponding Annual Report.

• At a minimum, all sites addressed by plan must be inspected by the Permittee or their representatives at least quarterly.

h) Training. The Permittee must ensure that all staff responsible for preconstruction site plan review, construction site inspections (or are otherwise implementing the construction site runoff control program) are adequately trained to conduct such activities. Orientation and training concerning the JBLM stormwater management program must be accomplished within the first six months of employment for new staff who work directly on stormwater management issues. Follow-up training must be provided as necessary to address changes in procedures, techniques or requirements. The Permittee must maintain records of relevant training provided or obtained, and the staff members trained.

A summary of this training occurring within the reporting period must be included in each Annual Report.

5. Stormwater Management for Areas of New Development and Redevelopment. The Permittee must use an ordinance (or other regulatory mechanism available under the legal authorities available to JBLM) to implement and enforce a program to control stormwater runoff from all public and private new development or redevelopment project sites that will disturb 5,000 square feet or more of land area.

The Permittee must include a written description of the program within the SWMP document. In each Annual Report, the Permittee must summarize the implementation status of these requirements for all new development and redevelopment project sites occurring during the relevant reporting period.

Certain projects may be exempt from specific provisions of this Part, as defined in Appendix C.

Pursuant to the procedures in Part II.A.7, the Permittee may submit to EPA for approval an alternative document, plan or program that describes functionally equivalent run-off controls to the 2012 Stormwater Management Manual for Western Washington and other manual provisions cited below.

At a minimum, within one year of the permit effective date, the Permittee must implement the following program components:

a) Site Planning Procedures. For all new development and redevelopment project sites disturbing 5,000 square feet or more, the Permittee must adopt and implement a project site planning process, including criteria for BMP selection and design; the site planning procedures must be implemented to protect water quality, and reduce the discharge of pollutants to the maximum extent practicable.

b) Preparation of a Stormwater Site Plan. For all new development and redevelopment project sites disturbing 5,000 square feet or more, the Permittee must require a project-specific stormwater site plan. Stormwater site plans must

Joint Base Lewis-McChord MS4 Permit No. WAS-026638 be prepared consistent with Chapter 3, Volume 1-Minimum Technical

Requirements and Site Planning of the 2012 Stormwater Management Manual for Western Washington; and with Chapter 3 of the Low Impact Development

Technical Guidance Manual for the Puget Sound (2012); or an alternative document approved pursuant to Part II.A.7. For new development or redevelopment sites disturbing 5,000 square feet or more within Airport Operations Areas (AOA), stormwater site plans must be prepared consistent with the Aviation Stormwater Design Manual (2008) or an alternative document approved pursuant to Part II.A.7.

c) Source Control of Pollution. The Permittee must require the use of available and reasonable source control BMPs at all new development and redevelopment project sites disturbing 5,000 square feet or more. Source control BMPs must be selected, designed, and maintained consistent with Volume IV-Source Control

BMPs of the 2012 Stormwater Management Manual for Western Washington or an alternative document approved pursuant to Part II.A.7. For new development or redevelopment sites disturbing 5,000 square feet or more within Airport Operations Areas (AOA), source control BMPs must be selected, designed and maintained consistent with the Aviation Stormwater Design Manual (2008) or an alternative document approved pursuant to Part II.A.7.

d) New Development and Redevelopment Site Design to Minimize Impervious

Areas, Preserve Vegetation, and Preserve Natural Drainage Systems. For all new development and redevelopment project sites disturbing 5,000 square feet or more, the Permittee must ensure such projects are designed to minimize impervious surfaces, retain vegetation, restore native vegetation, preserve natural drainage systems considering the techniques in the 2012 Stormwater

Management Manual for Western Washington or an alternative document approved pursuant to Part II.A.7, and meet the following requirements to the extent feasible:

• The Permittee must require site design that minimizes the project’s roadway surfaces and parking areas, incorporates clustered development, and ensures that vegetated areas are designed to receive stormwater dispersion from all developed project areas;

• The Permittee must ensure that natural drainage patterns of the project site are maintained, and that discharge from the new development or redevelopment project site occurs at the natural location;

• The Permittee must ensure that the manner by which runoff is discharged from the new development project site does not cause a significant adverse impact to downstream receiving waters and/or down gradient properties; and

• The Permittee must ensure that all outfalls utilize dissipation devices.

Joint Base Lewis-McChord MS4 Permit No. WAS-026638

e) Hydrologic Performance Requirement for On-site Stormwater

Management. For all new development or redevelopment project sites disturbing 5,000 square feet or more, the Permittee must require the use of on-site stormwater management practices intended to infiltrate, disperse, retain, and/or harvest and reuse stormwater runoff as follows:

i) For lawn and landscape areas on the new development or redevelopment project site, the Permittee must ensure the soil quality meets the specifications within BMP T5.13 (Post-Construction Soil Quality and Depth) in Chapter 5 of Volume V-Runoff Treatment

BMPs of the 2012 Stormwater Management Manual for Western

Washington (2012) or an alternative document approved pursuant to Part II.A.7. Lawn and landscape areas associated with project sites occurring within Airport Operations Areas must ensure the soil quality meets specifications in accordance with the Aviation

Stormwater Design Manual (2008) or an alternative document approved pursuant to Part II.A.7.

ii) For new or redevelopment project sites creating or replacing 2,000 >

4,999 square feet of hard surfaces, To the extent feasible, the Permittee must use stormwater dispersion or infiltration BMPs consistent with: Chapter 5 of Volume V of the 2012 Stormwater

Management Manual for Western Washington; Chapter 3 of Volume III of the 2012 Stormwater Management Manual for

Western Washington; the Low Impact Development Technical

Guidance Manual for the Puget Sound (2012); or an alternative document approved pursuant to Part II.A.7. Such project sites within Airport Operations Areas must ensure that stormwater dispersion or infiltration BMPs are used consistent with those specified in the Aviation Stormwater Design Manual (2008) or an alternative document approved pursuant to Part II.A.7.

iii) For new development or redevelopment project sites creating or replacing 5,000 square feet or more of hard surfaces:

(1) The Permittee must ensure the post-development stormwater discharge flows from the project site do not exceed the pre-development discharge flows for the range of 8% of the 2-year peak flow to 50% of the 2-year peak flow, as calculated by using the Western Washington Hydrology Model (or other continuous runoff model). For the purposes of Western Washington Hydrology Model, the pre-development condition for all new development and redevelopment project sites must be “forested land cover” (with applicable soil and soil grade), unless reasonable historic information indicates the site was prairie prior to settlement (and may be modeled as “pasture” when using the Western Washington Hydrology Model);

Joint Base Lewis-McChord MS4 Permit No. WAS-026638 or

(2) The Permittee must ensure the controls for post-development stormwater discharge flows from the project site meet the requirements for onsite stormwater management BMPs cited in List #2 of Minimum Requirement #5 in Volume 1 of the 2012 Stormwater Management Manual for Western Washington.

(a) The Permittee must keep written records for each new development or redevelopment project site summarizing the BMPs selected from List #2 of Minimum Requirement #5 in Volume 1 of the 2012 Stormwater

Management Manual for Western Washington, and any feasibility determinations for not selecting higher priority BMPs from List #2;

or

(3) The Permittee must ensure the controls for post-development stormwater discharge flows from the project site are designed to retain onsite the volume of stormwater produced from the 95th percentile rainfall event.

(a) The Permittee may exempt a new development or redevelopment project site from retaining the total volume of runoff calculated to meet the 95th percentile rainfall event, provided the Permittee fully documents its determination that compliance with the performance standard is not feasible. Feasibility must be determined by evaluation against design criteria, limitations, and infeasibility criteria identified for each stormwater best management practice in the 2012 Stormwater

Management Manual for Western Washington starting with the BMP list hierarchy in List #2 and the competing needs criteria listed in Chapter 5 of Volume V of the 2012 Stormwater Management Manual for

Western Washington).

(b) The Permittee must keep written records of all exempt project determinations. The following information regarding each exempt project identified during an annual reporting period must be included in the corresponding Annual Report:

(i) Name, location and identifying project description;

(ii) Reasons why full retention of the total volume of runoff calculated to meet the 95th percentile rainfall event is not feasible, including supporting documentation and all relevant

Joint Base Lewis-McChord MS4 Permit No. WAS-026638 engineering calculations, geologic reports and/or hydrologic analysis; and

(iii) The estimated annual runoff volume that can/will be successfully managed on site and the remaining annual runoff volume for which it is deemed not feasible to successfully manage onsite.

f) Hydrologic Performance Requirement for Flow Control. The Permittee must ensure that new development and redevelopment project sites are designed to control post development discharge flows where such sites: create >10,000 square feet effective impervious surface area;

convert ¾ acres or more from native vegetation to lawn/landscaping, and from which there is a surface discharge to a natural or manmade conveyance system; and/or, convert 2.5 acres or more of native vegetation to pasture, and from which there is a surface discharge to a natural or manmade conveyance system. For these new development or redevelopment project sites, post-development stormwater discharge flows must not exceed the pre-development discharge flows for the range of 50% of the 2-year peak flow to 100% of the 50-year peak flow, as calculated by using the Western Washington Hydrology Model (or other continuous runoff model). For the purposes of the Western Washington Hydrology Model, the pre-development condition for all new development and redevelopment project sites must be “forested land cover” (with applicable soil and soil grade), unless reasonable historic information indicates the site was prairie prior to settlement (and may be modeled as “pasture” when using the Western Washington Hydrology Model).

• The Permittee must prioritize the use of small scale dispersion or infiltration practices, or other appropriate Low Impact Development practices to meet this flow control requirement. The Permittee may not design new development or redevelopment sites to meet this hydrologic performance requirement for flow control solely through the use of large scale retention or detention practices.

• New development or redevelopment project sites that will discharge directly to the JBLM Canal, or indirectly through Outfalls #OF-4 or #OF-5, are exempt from this hydrologic performance requirement for flow control.

• Pursuant to the procedures in Appendix C.6, the Permittee may exempt a project site from full compliance with the performance standards cited above if the severe economic cost criteria referenced in Appendix C.6 prevent use of any BMPs to attain the performance standards.

Joint Base Lewis-McChord MS4 Permit No. WAS-026638

g) Runoff Treatment. The Permittee must ensure the proper construction of stormwater treatment facilities for all new development or redevelopment sites in accordance with Appendix B of this permit.

h) Wetlands Protection. The Permittee must ensure that discharges to wetlands from new development or redevelopment project sites maintain the hydrologic conditions, hydrophytic vegetation, and substrate characteristics necessary to support existing and designated uses. The hydrologic analysis must use the existing land cover condition to determine the existing hydrologic conditions, unless directed otherwise by a regulatory agency with jurisdiction.

i) Inspections. No later than January 25, 2016, the Permittee must develop an inspection program intended to verify that the permanent stormwater facilities used for onsite management, flow control and treatment as required by this Part are properly installed and operational. The inspection plan must describe the criteria which the Permittee will use to trigger a post-construction site inspection, timeframes within which sites meeting the criteria will be inspected, and the anticipated response to address any deficiencies identified.

• The Permittee must develop and utilize a site inspection form to document all post-construction site inspections required by this subpart.

• The written post-construction site inspection plan, and associated inspection form, must be included in the SWMP document no later than two years from the effective date of this permit.

• Beginning with the 2nd Year Annual Report, and annually thereafter, information summarizing all inspections conducted by the Permittee during the previous reporting period, including the locations and total number of such site inspections, and resulting actions to address any deficiencies, must be submitted as part of the corresponding Annual Report.

j) Operation and Maintenance. The Permittee must ensure long term operation and maintenance (O&M) of all permanent stormwater facilities used for onsite management, flow control, and treatment. No later than three years from the effective date of this permit, the Permittee must implement O&M standards (in the form of a manual or other specific reference[s]) to address all permanent stormwater facilities used for onsite stormwater management, flow control and treatment and which are installed at new development and redevelopment project sites after the effective date of this permit. The O&M standards for all permanent stormwater facilities must be consistent with Chapter 4, Volume V-

Runoff Treatment BMPs of the 2012 Stormwater Management Manual for

Western Washington or an alternative document approved pursuant to Part

II.A.7.

• To ensure long term O&M of stormwater facilities, the Permittee must require all entities responsible for such O&M to use the referenced maintenance standards/manual required in this Part.

Joint Base Lewis-McChord MS4 Permit No. WAS-026638

• The Permittee must maintain an inventory of all permanent stormwater facilities which are used for onsite stormwater management, flow control, and treatment, consistent with Part II.B.3.a of this permit, and must maintain records of all related maintenance activity.

• A summary of anticipated annual maintenance activity, by type and number of facilities, must be included in the SWMP documentation.

• A summary of facility maintenance activity accomplished during the previous reporting period must be included in the corresponding Annual Report

k) Training. The Permittee must ensure all staff responsible for plan review, hydrologic modeling, site inspections and enforcement necessary to implement the program outlined in Part II.B.5, are adequately trained to conduct these activities. Orientation and training concerning the JBLM stormwater management program must be accomplished within the first six months of employment for new staff who work directly on stormwater management issues.

Follow-up training must be provided as necessary to address changes in procedures, techniques or requirements. The Permittee must maintain records of relevant training provided, or obtained, and the staff members trained. A summary of this training occurring within the reporting period must be included in each Annual Report.

6. Pollution Prevention and Good Housekeeping for Municipal Operations &

Maintenance. Within two years from the effective date of this permit, the Permittee must update and implement its operations and maintenance (O&M) program to prevent or reduce pollutants in runoff from the Permittee’s MS4 and from ongoing municipal operations. The written description of the program must be included in the SWMP document. At a minimum, the O&M program must address each of the following program components:

a) Maintenance Standards for Permanent Stormwater Facilities. The Permittee must establish maintenance standards for its permanent stormwater facilities used for onsite management, flow control and treatment that are protective of facility function. The purpose of a maintenance standard is to determine if maintenance of a stormwater facility is required. The maintenance standard is not a measure of the facility’s required condition at all times between inspections. Exceeding the maintenance standard between inspections is not a permit violation.

Unless there are circumstances beyond the Permittee’s control, if an inspection required in Part II.B.6.b identifies that a facility’s maintenance standard has been exceeded, the Permittee must perform…