PART V. Stormwater Management Program

Part V. Stormwater Management Program

A. Stormwater Management Program

The Permittee shall develop, and as necessary continue to develop, implement, and enforce a Stormwater Management Program designed to reduce the discharge of pollutants from the municipal separate storm sewer system to the Maximum Extent Practicable (MEP), to protect water quality and to satisfy the appropriate water quality requirements of the Clean Water Act and the conditions of this permit. The Stormwater Management Program is an enforceable part of the permit.

The Stormwater Management Program shall be the document that describes in detail all activities related to the Permittees program for the management of stormwater in its jurisdiction in accordance with this permit and the appropriate water quality requirements of the Clean Water Act, including long-term goals (that may extend beyond the permit period), Minimum Control Measure-specific goals, priorities, strategies, monitoring, record keeping and reporting. The Stormwater Management Program shall cover at least the term of the permit and be based on an adaptive management system by which the Permittee continuously monitors, analyzes and adjusts the Stormwater Management Program to achieve pollutant reductions to the MEP. The Stormwater Management Program shall include the Minimum Control Measures (described in Part V.C.1 to 8 of this permit) and shall conform with the requirements of Part V.B to V.F of this permit. Upon their approval by the Commissioner, modifications to the Stormwater Management Program are an enforceable part of the permit and shall be implemented as specified in the permit and in the Commissioner’s approval letter. Prior to approval by the Commissioner of the revised Stormwater Management Program, the Permittee shall continue to operate in accordance with this permit and the Permittee’s current Stormwater Management Program. The Permittee shall, upon the receipt of notice of the Commissioner’s approval of the revised Stormwater Management Program, commence operation under the revised Stormwater Management Program. Modifications to the Stormwater Management Program may be made through the Annual Report, required under Part V.E of this permit, in compliance with Part V.D. 3, 4 and 5 of this permit. Modifications to the Stormwater Management Program shall be implemented as specified in the Annual Report and in the Commissioner’s approval letter.

The Annual Report shall discuss progress toward achieving the long-term and Minimum Control Measure-specific goals of the Stormwater Management Program and shall modify as necessary the priorities, strategies, and monitoring of the Stormwater Management Program to achieve the long-term and Minimum Control Measure-specific goals. The Annual Report shall conform to the requirements of Parts V.E and VI.D of this permit.

B. Minimum Control Measure General Requirements

The Permittee shall manage, operate, and maintain its storm sewer system and areas that the Permittee controls that discharge to the storm sewer system in a manner to reduce the discharge of pollutants to the MEP. Each Minimum Control Measure shall consist of a combination of BMPs, including: system design and engineering methods; education; operation; maintenance; control techniques; a schedule for installation and/or implementation of planned BMPs; and such other provisions as the Permittee and/or Commissioner determines to be appropriate. The BMPS selected by the Permittee for the Minimum Control Measures shall meet the minimum requirements of this permit. In the development of Minimum Control Measures for the Stormwater Management Program, the Permittee shall consider the sources of pollutants and the sensitivity of the receiving waters.

For each Minimum Control Measure, the Stormwater Management Program shall include:

1. identification of potential sources and pollutants targeted for reduction;
2. a description of and the scope of the BMPs for each Minimum Control Measure;
3. identification of staff and financial resources, including estimated annual budgets, for the permit term dedicated to implementation of the Minimum Control Measure;
4. measurable, Minimum Control Measure-specific goals that will be used to determine the success or benefits of the Minimum Control Measure;
5. schedules and protocol for monitoring, recordkeeping and reporting;
6. an implementation schedule for new or revised BMPs; and
7. a detailed description or copy of any agreement between the Permittee and partner(s) to implement the Minimum Control Measure describing the rights, roles, and responsibilities of each party to the agreement.

C. Minimum Control Measures

The Minimum Control Measures listed below must be included in the Stormwater Management Program. The Permittee shall define appropriate BMPs for these Minimum Control Measures and measurable Minimum Control Measure-specific goals.

1. Public education and outreach on stormwater impacts.

Public education and outreach on stormwater impacts. The Permittee shall select and implement a program of appropriate BMPs and measurable Minimum Control Measurespecific goals for this Minimum Control Measure taking into account known water quality impairments, community concerns, and baseline awareness levels of constituents. At a minimum, the Permittee shall:

a. implement a multilingual program to educate the residents, businesses, and industrial facilities that reside or do business within the Permittee’s jurisdiction to raise the level of understanding and awareness of stormwater issues. The program shall consist of multiple efforts and communication methods to educate the target audiences about the impacts of stormwater discharges on water bodies including known impairments and the steps that can be taken to reduce pollutants in stormwater runoff.

b. implement a public education program that addresses each Minimum Control Measure. The Permittee may focus on one Minimum Control Measure or combination of Minimum Control Measures each year for the entire calendar year on a rotating annual basis. The Permittee shall address:

1) Public participation;

2) Illicit discharge detection and elimination;

3) Construction site stormwater runoff control;

4) Post-construction stormwater management;

5) Pollution prevention and good housekeeping for municipal operations;

6) Monitoring and analysis; and

7) TMDL.

c. identify for each Minimum Control Measure:

1) the audience or audiences involved;

2) specific educational goals for each audience. The education-specific goal shall be stated in terms of increased awareness, increased understanding, acquired skills, and/or desired changes in behavior;

3) activities used to reach educational goals for each audience;

4) activity implementation plans, including responsible department in charge,entities responsible for given activities, and schedules; and

5) performance measures that can be used to determine success in reaching education-specific goals (e.g. surveys, interviews, other measures of changes in awareness, understanding, and behavior);

d. describe how the education program is coordinated with, and makes effective use of, other stormwater education programs being conducted in the area by other entities, if the Permittee relies upon another entity for some of its education and outreach Minimum Control Measure. The Permittee may use education programs developed and administered by other entities, as appropriate for the municipal separate storm sewer system, including, but not limited to: community groups, nonprofit organizations, lake conservation districts, soil and water conservation districts, watershed districts, watershed management organizations, school districts, University of Minnesota Extension, and county, regional, state, and federal government. The Permittee shall list formal agreements or partnerships and describe the functions performed by the other entity(ies) for the Permittee.

e. implement a program to inform and educate:

1) the public and affected industries, regarding the prohibition, proper management and impacts of the introduction of non-stormwater discharges into the storm sewer system.

2) the public and commercial applicators and distributors of pesticides and fertilizers, regarding the proper application of pesticides and fertilizers with an emphasis on working with the Minnesota Department of Agriculture and retail centers to aid compliance with fertilizer restrictions, soil phosphorus testing and public information efforts;

3) the public, regarding the proper management of pet waste and the beneficial onsite reuse of leaves and grass clippings.
If another entity has implemented an education program in a portion of the jurisdiction, the Permittee may work with that entity to share resources and expand the program to all portions of the municipal separate storm sewer system.

f.hold at least one public meeting per year addressing the Stormwater Management Program and the Annual Report. A summary of the public input and/or testimony received at the meeting and the Permittee’s response to it shall be included in the Annual Report. The Permittee shall hold the public meeting prior to submittal to the Commissioner of the Annual Report required in Part V.E. The meeting and meeting notice shall meet the following requirements:

1) Location. The public informational meeting shall be held in the general vicinity of the municipal separate storm sewer system which is the subject of the permit. Otherwise, the public informational meeting shall be held in a place that is generally convenient to persons expected to attend the meeting.

2) Notice. The Permittee shall prepare and publish a notice of the public informational meeting. Publication of the notice shall be at least 30 days prior to the meeting. The notice shall contain a reference to the Stormwater Management Program and Annual Report; proposed modifications to the monitoring and analysis and/or TMDL Minimum Control Measures (as appropriate); the date, time, and location of the public informational meeting; a concise description of the manner in which the public informational meeting will be conducted; and information about where a copy of the Stormwater Management Program and Annual Report is available for public review.

3) Distribution of notice. The Permittee shall publish the notice in a newspaper of general circulation in the general vicinity of the municipal separate storm sewer system, and shall make a copy of the notice available to the Commissioner, the appropriate county officials, all governmental entities that have jurisdiction over activities that directly or indirectly relate to stormwater management in the drainage area, and all other persons who have requested that they be informed of public meetings for the Stormwater Management Program and Annual Report.

4) Joint meetings. The Permittee may consolidate two or more matters, issues, or related groups of issues to meet the requirements of this part. These public meetings may be part of a larger public meeting, such as a city council meeting, provided that adequate public notice and opportunity to participate is provided.

2. Public participation, public involvement.

The Permittee shall select and implement a program of appropriate BMPs and measurable Minimum Control Measure-specific goals for public participation and public involvement. The Permittee shall implement and, as necessary, continue to develop its public participation and public involvement effort in order to effectively communicate with their constituents regarding stormwater management. At a minimum, the Permittee shall:

a. make available to the public on the Permittee’s website stormwater related public documents including:

1) current MS4 permit

2) current Stormwater Management Program

3) current Annual Report

4) current monitoring report

5) other plans and reports required under this permit

b. comply with applicable public notice requirements of Part V.C.1.f.2 and 3 when implementing the provisions of the Stormwater Management Program;

c. get public input on the adequacy of the Stormwater Management Program, including input from the public meeting described in Part V.C.1.f, each year prior to submittal of the Annual Report to the Commissioner.

The Permittee:

1) shall afford interested persons a reasonable opportunity to make oral statements concerning the Stormwater Management Program; and

2) shall consider relevant written materials that interested persons submit concerning the Stormwater Management Program;

d. consider the public input, oral and written, to the Stormwater Management Program and shall make appropriate adjustments; and

e. include a formal resolution from the Permittee's governing body adopting the Annual Report and the Stormwater Management Program with the Annual Report.

3. Illicit discharge detection and elimination

Illicit discharge detection and elimination. The Permittee shall implement and enforce its program, and as necessary continue to develop its program to detect and eliminate illicit discharges as defined in 40 CFR § 122.26(b)(2). To the MEP, the Permittee shall minimize any adverse impact to waters of the state resulting from all unauthorized discharges, random, frequent or infrequent, accidental or otherwise, of pathogens, nutrients, oil, toxic pollutants or other hazardous substances consistent with Minn. Stat. § 115.061 and 40 CFR Parts 110 and 116. This requirement applies to discharges to the storm sewer system within the Permittee’s jurisdiction including physical connections and discharges through catch basins and similar points of access to the MS4. The Permittee shall also select and implement a program of appropriate BMPs and Measure. At a minimum, the Permittee shall:

a. develop within three years of the effective date of this permit, if not already completed, an electronic inventory and map of the storm sewer system showing the location of:

1) ponds, streams, lakes and wetlands that are part of the system;

2)structural pollution control devices (e.g., grit chambers, separators, etc.) that are part of the system. The inventory shall include:

i. the size of the area tributary to it,

ii. the land use types and distributions,

iii. the design capacity of the structure where available, estimated capacity if design capacity is unavailable, or size of the structure, and

iv. catch basins with sumps.

Catch basins and other storm drain inlets without sumps do not have to be identified in the inventory;

3) all pipes (catch basin lead pipes shall be added as opportunities arise), ditches and swales in the Permittee’s system;

4) Permittee-owned facilities and associated structural pollution control devices

5) outfalls, including discharges from the system to other municipal separate storm sewer system or waters and wetlands that are not part of the system (where the Permittee does not have operational control); structures that primarily discharge stormwater into groundwater and all other points of discharge from the system that are outlets, not diffuse flow areas. The inventory shall also include:

i. outfall identification number,

ii. size of outfall pipe,

iii. size of the drainage area,

iv. land use types in drainage area and their distribution,

v. percent of area that is impervious surfaces, and

vi. the number and type of structural pollution control devices in the drainage area; and

6) inflows from other municipal separate storm sewer system.

b. effectively prohibit, through ordinance or other regulatory mechanism and appropriate enforcement procedures, the introduction of non-stormwater discharges into the storm sewer system.

c. develop and, as necessary continue to develop, and implement:

1) processes to:

i. receive, track and investigate complaints of illicit discharges including responsiveness goals for responding to, and elimination of, illicit discharges;

ii. identify the source of the illicit discharges;

iii. enforce violations of prohibitions on illicit discharges; and

iv. report activities to identify, track, investigate and eliminate illicit discharges in the Annual Report required under V.E.

2) processes to educate the public, municipal employees, business and industry regarding illicit discharges and improper disposal of waste, including:

.i.identification of illicit discharges to catch basins, ditches, swales and structural pollution control devices,

ii. identification of illicit connections,

iii. associated hazards,

iv. reporting,

v. prevention,

vi. containment, and

vii.response to spills that may discharge into the municipal separate storm sewer;

3) procedures to promote, publicize, and facilitate public reporting of illicit discharges or water quality impacts associated with discharges into or from MS4s through a central contact point, including phone numbers for complaints and spill reporting, and publicize to both internal permittee staff and the public.

4) procedures to implement both temporary and permanent structural pollution control devices to ensure against ongoing prohibited discharges for circumstances where potential discharges are likely to remain (e.g., power washing, cement cutting and lawn maintenance),

5) procedures to limit infiltration of seepage from municipal sanitary sewers to municipal separate storm sewer system;

d. shall develop, and as necessary continue to develop, and implement a dry weather field screening program to detect and eliminate non-stormwater discharges, including illegal dumping, to the system. The Permittee shall inspect each outfall at least once over the five-year term of this permit for evidence of illicit discharges. The program shall be a continuous operation without significant time lapses between inspections. The program shall include:

1) a description of procedures to be followed to prioritize and investigate portions of the municipal separate storm sewer system that indicate a reasonable potential for containing illicit discharges or other sources of non-stormwater. The Permittee shall prioritize investigations based on the results of the field screen, the presence of potential sources of non-stormwater discharges in the geographic area drained by that portion of the municipal separate storm sewer system, history, land use, sanitary sewer system, proximity to sensitive waters and other appropriate information;

2) areas or locations to be evaluated;

3) a schedule for the field screening activities;

4) pollutants of interest;

5) evaluation procedures including non-sampling evaluation (e.g. visualobservations, odors, etc.)

6) sampling procedures;

7) record keeping; and

8) notification of the Department of Public Safety Duty Officer as required in Minn. Stat. sect. 115.061. The program may be implemented in conjunction with the control structure inspection program required by Part V.C.6.b.4 of this permit as well as during routine maintenance activities performed in areas included in the Permittee’s jurisdiction. Reports of illicit discharges shall be investigated.

The program may be implemented in conjunction with the control structure inspection program required by Part V.C.6.b.4 of this permit as well as during routine maintenance activities performed in areas included in the Permittee’s jurisdiction. Reports of illicit discharges shall be investigated.

e maintain an education program for its staff regarding the duty to notify the Department of Public Safety Duty Officer as required in this permit and the notification protocol for maintenance staff of other departments’ staff for response and containment of materials;

f implement the following measures for hazardous waste and other industrial facilities:

1) maintain and continue to develop an inventory of industrial, commercial, or institutional facilities that discharge any flow other than stormwater to the municipal separate storm sewer system. The inventory shall include the name, location, discharge location to the municipal separate storm sewer system, the receiving water, discharge description, and any permits issued for the discharge. The MPCA will provide a list of permitted facilities to the city upon request.

2) a program that identifies industrial facilities that the Permittee determines are contributing a substantial pollutant loading to the municipal storm sewer system including:

i. Stormwater hotspots, to the extent possible, using industrial/commercial stormwater risk factors and input from Hennepin County Environmental Services and Minneapolis Inspections Departments to identify these stormwater hotspots and establish priorities;

ii. municipal landfills, hazardous waste treatment, disposal and recovery facilities, industrial facilities that are subject to section 313 of title III of the Superfund Amendments and Reauthorization Act of 1986 (SARA), and.

3) a program that describes procedures for addressing industrial facilities that the Permittee determines are contributing a substantial pollutant loading to the municipal storm sewer system including: inspecting the facilities, monitoring the facilities’ illicit discharges and implementing control measures for such illicit discharges associated with the stormwater hotspots and priority industrial facilities identified in part V.C.3.f.2 to be implemented during the term of the permit, including the submission of quantitative data on the following constituents: any pollutants limited in effluent guidelines subcategories, where applicable; any pollutant listed in an existing NPDES permit for a facility; oil and grease, COD, pH, BOD5, TSS, total phosphorus, total Kjeldahl nitrogen, nitrate plus nitrite nitrogen, and any information on discharges required under 40 CFR 122.21(g)(7) (iii) and (iv).

g. the following non-storm water discharges or flows shall be addressed where such discharges are identified by the Permittee as a significant contributor of pollutants

1) water line flushing;

2) landscape irrigation;

3) diverted stream flows;

4) rising ground waters;

5) uncontaminated ground water infiltration (as defined at 40 CFR § 35.2005(b)(20));

6) uncontaminated pumped ground water;

7) discharges from potable water sources;

8) foundation drains;

9) air conditioning condensation;

10) irrigation water;

11) springs;

12) water from crawl space pumps;

13) footing drains;

14) lawn watering;

15) individual residential car washing;

16) flows from riparian habitats and wetlands;

17) dechlorinated swimming pool discharges;

18) street wash water discharges; and

19) flows from fire fighting activities.

If the Permittee determines that any of the preceding categories is a significant contributor of pollutants, the Permittee shall identify the category as such and develop, and as necessary continue to develop, implement, and enforce a program to reduce pollutants from the category in the Stormwater Management Program.

4. Construction site stormwater runoff control.

The Permittee shall develop, and as necessary continue to develop, implement, and enforce a program to reduce pollutants in stormwater runoff to the municipal separate storm sewer system from construction activities (public and private) within the Permittee’s jurisdiction that result in a land disturbance of greater than or equal to one acre. Controls on stormwater discharges from construction activity disturbing less than one acre shall be included in the program, if that construction activity is part of a larger common plan of development or sale that would disturb one acre or more. The Permittee shall select and implement a program of appropriate BMPs and measurable Minimum Control Measure-specific goals for this Minimum Control Measure. At a minimum, the Permittee shall establish and maintain:

a. an ordinance or other regulatory mechanism to require erosion and sediment controls, as well as sanctions to ensure compliance, to the extent allowable under law. The ordinance or other regulatory mechanism shall require the owners or operators of all construction activity to implement and maintain BMPs that, at a minimum, provide a level of erosion and sediment control equivalent to that required by Minnesota’s NPDES General Stormwater Permit for Construction Activity;

b. requirements for construction site operators to implement appropriate erosion and sediment control BMPs including installation, inspection and maintenance of the BMPs;

c. requirements for construction site operators to control (i.e., properly dispose of, reuse or recycle) wastes at the construction site, such as discarded building materials, concrete truck washout, construction-site chemicals, litter, and sanitary waste, that may cause adverse impacts to water quality;

d. requirements for stabilization of stockpiles and disturbed areas including requirements for timeliness and duration of stabilization controls;

e. requirements for site dewatering including a prohibition on discharge of water unless appropriately treated;

f. standardized written procedures for evaluating the adequacy of erosion and sediment control in site plan review and site inspections by the Permittee including:

1) consideration of potential water quality impacts;

2) a determination of the need for a Construction Stormwater Permit from the MPCA and, if a Construction Stormwater Permit from the MPCA is required, verification that the permit is obtained;

3) documentation of plan review and decisions;

4) the scope of the inspections;

5) frequency of the inspections;

6) standardized inspection checklist;

7) documentation of inspections;

8) site-specific checklist or other procedures to ensure construction activity proceeds in accordance with approved plans;

9) follow-up and enforcement procedures;

10) identifying priorities for inspections taking into consideration: the nature of the construction activity, topography, soils characteristics, and the water quality of any receiving water(s); and

11) a database of construction sites to track site plan review, construction progress and erosion and sediment control compliance.

g. procedures to promote, publicize and facilitate public reporting of construction related erosion and sedimentation issues through mechanisms such as the website, phone and email and for receipt and consideration of complaints, reports of noncompliance or other information on construction-related issues submitted by the public.

h. adequate training for all staff whose job duties are related to implementing the construction stormwater program, including permitting, plan review, construction site inspections, and enforcement. The training may be conducted by the permittee or a qualified third party. The training shall address the job-specific duties of staff and include, at a minimum:

1) for Erosion and Sediment Control/Stormwater Inspectors, proper control measure selection, installation, implementation, and maintenance, as well as administrative requirements such as inspection reporting/tracking and use of the permittee’s enforcement responses; and

2) for other Construction Inspectors on general stormwater issues, basic control measure implementation information, and procedures for notifying the appropriate personnel of noncompliance.

3) for Plan Reviewers regarding control measure selection, design standards, and review procedures.

5. Post-construction storm water management for public or private projects.

Post-construction stormwater management for public or private projects. The Permittee shall utilize a comprehensive planning process to develop, and as necessary continue to develop, implement, and enforce a program to address stormwater runoff from project areas within the jurisdiction that disturb greater than or equal to one acre, including projects that disturb less than one acre that are part of a larger common plan of development or sale that disturbs greater than or equal to one acre, that discharge into the municipal separate storm sewer system. The program shall include appropriate local controls that would prevent or reduce water quality impacts. The Permittee shall also select and implement a program of appropriate BMPs and measurable Minimum Control Measure-specific goals for this Minimum Control Measure. At a minimum, the Permittee shall:

a. develop and submit to the Commissioner for approval within 36 months of permit issuance a plan to reduce stormwater runoff volume associated with post-construction storm water management. The Permittee shall implement the plan upon approval. The plan may include strategies which incorporate the principals of low impact design, better site design or similar design standards in addition to a combination of other BMPs appropriate for the community. The plan shall include a framework for determination of the feasibility of on-site stormwater volume reduction based on site characteristics and BMP design features including but not limited to:

1) efforts to minimize and disconnect impervious cover;

2) managing stormwater quantity and quality as close to the source as possible;

3) site soils;

4) depth of ground water table;

5) sources of pollution;

6) available space for BMPs;

7) depth of bedrock;

8) karst features;

9) site soil contamination; and

10) installation, operation and maintenance costs;

For projects where it is determined that adequate stormwater volume reductions cannot be achieved on-site, a stormwater volume reduction crediting system must be developed to achieve the required reductions at another site outside of the project area and within the Permittee’s jurisdiction. When possible, offsite stormwater volume reductions shall be achieved in the same drainage area or sub-watershed as the project site.

b. include a process for the review of impacts to the design capacity of existing structural pollution control devices when proposals increase the drainage area, loading and/or stormwater volume to the BMPs compared to the original design capacity;

c. develop, implement and enforce an ordinance, performance standard or other regulatory mechanism, including sanctions, to reduce post-construction runoff and pollutant loading from project areas;

d. implement procedures for maintenance, inspection, record keeping and reporting sufficient to ensure proper and adequate long-term operation and maintenance of all BMPs owned by the Permittee. The Permittee shall also develop, implement and enforce an ordinance or other mechanism, such as agreements with the owners of privately owned BMPs that were installed as a result of the Permittee’s requirements, for maintenance, inspection, record keeping and reporting. The Permittee shall maintain a list of privately owned BMPs for which the Permittee established such agreements;

e. establish BMP design requirements for new storm sewer projects and existing storm sewer addition or modification projects, consistent with reliable and efficient conveyance of stormwater, for:

1) reduction of runoff volume;

2) reduction of water quality impacts on the receiving water(s); and

3) retrofitting existing devices to provide additional pollutant removal from stormwater discharges.

Designs may include either inlet or outlet control measures, or other BMPs; and

f. evaluate potential of street construction/reconstruction projects for:

1) reduction of runoff volume;

2) reduction of water quality impacts on the receiving water(s); and

3) retrofitting existing devices to provide additional pollutant removal from stormwater discharges.

6. Pollution prevention and good housekeeping at municipal operations.

The Permittee shall select and implement a program of appropriate BMPs and measurable Minimum Control Measure-specific goals for this Minimum Control Measure. At a minimum, the Permittee shall:

a. develop, and as necessary continue to develop, and implement an operation and maintenance program that includes a training component and has the ultimate goal of preventing or reducing pollutant runoff from municipal operations. The program shall include written standard operating procedures for preventing pollution in municipal operations (e.g. street sweeper operation, procedures for lawn maintenance, fertilizer and pesticide usage, equipment cleaning, and vehicle maintenance). Training and training materials that are available from the United States Environmental Protection Agency (USEPA), MPCA, University of Minnesota, state and regional agencies, or other organizations may be used or modified as appropriate for the community. The program shall include employee training to prevent and reduce stormwater pollution from activities such as park and open space maintenance, public street maintenance and deicing, fleet and building maintenance, new construction and land disturbances, and stormwater system maintenance.

b. also:

1) operate and maintain the municipal separate storm sewer system in a manner so as to reduce the discharge of pollutants to the MEP pursuant to Minn. R. 7001.0150, subp. 3(F). Proper operation and maintenance includes effective performance, adequate funding, adequate operator staffing and training, and adequate laboratory and process controls, including appropriate quality assurance procedures required to insure compliance with the conditions of this permit. Provide training for staff critical to the operation and maintenance of structural pollution control devices.

2) dewater and dispose of solids, floatables, dredgings, or other pollutants resulting from the control and/or treatment of stormwater, in such a manner so as to prevent any pollutant from such materials from entering waters of the state. The Permittee, in disposing of such materials, shall comply with all applicable statutes and rules.

3) assess at least annually all structural pollution control devices, such as trapmanholes, grit chambers, sumps, floatable skimmers and traps, separators, and other small settling or filtering devices. All structural pollution control devices shall be assessed, where appropriate, using methods detailed in ““Gulliver, J.S., A.J. Erickson, and P.T. Weiss (editors). 2010. "Stormwater Treatment: Assessment and Maintenance." University of Minnesota, St. Anthony Falls Laboratory. Minneapolis, MN. http://stormwaterbook.safl.umn.edu/;

4) inspect, at minimum, twenty percent of the municipal separate storm sewer system outfalls, sediment basins and ponds for structural and functional integrity each year on a rotating basis. If additional erosion protection is necessary, the protection project shall be completed during the same year as the inspection or a schedule for completion shall be submitted in the Annual Report. Results of outlet inspections shall be reported in the Annual Report and include the dates of inspection and the date of completion of any additional erosion protection projects.

5) inspect for discharges, or the potential for discharges, all exposed stockpile, storage, and material handling areas. Inspections shall be weekly when material is being actively handled, used or disturbed on a daily basis and at least monthly when material is not being actively handled, used or disturbed. Incorporate controls, such as perimeter controls, at stockpiles that are not covered, to prevent material from entering the municipal separate storm sewer system.

6) develop and as necessary continue to develop and implement a plan and schedule for preventative maintenance for the municipal separate storm sewer system’s components and structural control pollution control devices. In addition to preventative maintenance, the Permittee shall, based on the Permittee’s inspection, determine if repair, replacement, or maintenance measures are necessary for proper operation and to prevent environmental impacts such as erosion. The necessary measures shall be completed as soon as possible, usually during the same year as the inspection. When repair, replacement, or maintenance must be delayed, the Permittee shall prioritize the needed repair, replacement or maintenance and report in the Annual Report:

i. municipal separate storm sewer system’s components and structural pollution control devices subject to the repair, replacement or maintenance;

ii. reasons for delaying the needed repairs, replacement or maintenance; and

iii. the schedule for completion of the repair, replacement or maintenance.

7) keep records and report in the Annual Report the results of structural pollution control device inspections, assessments, maintenance, and repair activities including: date, antecedent weather conditions, sediment storage and capacity remaining, and any maintenance and/or repairs performed or recommended. Keep records of, and report in the Annual Report, the nature and quantity of removed substances and categorize the removed substances by structural pollution control devices and types of substances (e.g., leaves, sediment, etc.).

8) To the extent feasible, the Permittee shall work with the Metropolitan Mosquito Control District to identify BMP maintenance issues

c. operate and maintain the Permittee’s parking lots and the Permittee’s streets, roads, and highways within its jurisdiction in a manner so as to reduce the discharge of pollutants to the MEP. The Permittee shall, at a minimum:

1) develop, and as necessary continue to develop and implement a program and schedule to maintain and sweep public parking lots, streets, roads and highways under its jurisdiction including prioritizing areas based on land use, trash and stormwater pollutant levels generated;

2) operate an effective program of street sweeping in which all streets are swept at least two times per year, once in the spring and once in the fall and higher priority areas swept more frequently;

3) use methods to reduce the runoff of deicing materials, chemicals, and sand applied to roadways under its jurisdiction, consistent with traffic safety;

4) store deicing materials, chemicals, and sand in such a manner as to prevent uncontrolled runoff and discharge of these materials; and

5) record, and report in the Annual Report for the previous calendar year:

i. the quantity of material removed during street sweeping - seasonal sweepings to remove sand in the spring and leaves in the fall shall be itemized;

ii. the quantity of deicing materials, chemicals, and sand applied to roadways; and

iii. the location and description of all deicing materials storage facilities.

d. develop, and as necessary continue to develop, implement, and enforce a program to identify and control significant sources of sediment within the jurisdiction.

e. implement the following flood control measures:

1) ensure that any flood control projects the Permittee undertakes are designed to minimize the impacts on the water quality of the receiving water. When repairs, improvements, or changes are planned for existing flood control devices, the Permittee shall also evaluate the feasibility of retrofitting the existing devices to provide additional pollutant removal from stormwater discharges; and

2) provide a list of existing flood control detention facilities that are primarily intended for volume control. The Permittee shall also report in each Annual Report the number, type and schedule of flood control projects planned and describe the pollutant removal capabilities associated with each project.

f. for constructed storm water ponds and wetlands or natural ponds used for the collection of stormwater as required by Chapter 172, Sec. 28 of the 2009 Session Laws:

1) within 12 months of the issuance date of this permit, submit to the Commissioner the Stage 1 inventory information; and

2) update the Permittee’s Stormwater Management Program’s maintenance BMPs to incorporate treating or cleaning up contaminated sediments in storm water ponds and wetlands or natural ponds used for the collection of stormwater in accordance with “Managing Dredged Materials In the State of Minnesota,” Minnesota Pollution Control Agency, June 2009. The stormwater Management Program shall be update with the first Annual Report after submission of the Stage 1 inventory required under V.C.6.g.1.

7. Monitoring and analysis.

Monitoring and analysis. A goal of the monitoring and analysis requirement is to quantify stormwater volumes and loads from the MS4 and assist in the assessment of effectiveness of the stormwater management program.

aThe Permittee shall to the extent feasible, develop, and as necessary continue to develop, and implement a cooperative monitoring, analysis and reporting effort with partners including:

1) adjacent municipalities;

2) Metropolitan Council Environmental Services;

3) Mississippi Watershed Management Organization;

4) Shingle Creek Watershed Management Commission;

5) Bassett Creek Water Management Commission;

6) Minnehaha Creek Watershed District;

7) Hennepin County Environmental Services; and

8) Metropolitan Mosquito Control District.

The Permittee shall compile, maintain and share with partnering agencies a list of monitoring that is occurring within the Permittee’s jurisdiction. The Permittee shall make reasonable efforts to standardized methods for monitoring protocols and load calculation methodologies among cooperating agencies. It is acknowledged that there may be different monitoring approaches and goals among partnering local groups. Substantial issues and differences between partnering efforts shall be noted in the Annual Report required under Part V.E. of this permit.

b. The quality assurance project plan for lab and field methods and procedures shall comply with the following USEPA requirements and guidance or receive approval from the MPCA for variations from these protocols:

1) EPA Requirement for Quality Assurance Project Plans (EPA QA/R-5) (EPA/240/B-01/003); and

2) EPA Guidance for Quality Assurance Project Plans EPA QA/G-5 (EPA/600/R98/018).

The Permittee shall utilize Minnesota Department of Health-certified laboratory(s). The Permittee shall utilize standard assessment methods such as detailed in “Gulliver, J.S., A.J. Erickson, and P.T. Weiss (editors). 2010. "Stormwater Treatment: Assessment and Maintenance." University of Minnesota, St. Anthony Falls Laboratory. Minneapolis, MN. http://stormwaterbook.safl.umn.edu/.

c. The Permittee shall provide an analysis of the monitoring and sampling results as part of the Annual Report required under Part V.E. of this permit.

1) The purposes of the analysis include:

i. characterizing pollutant event mean concentrations;

ii. estimating total annual pollutant load to bodies of water;

iii. estimating total annual volume to bodies of water;

iv. estimate effectiveness of stormwater system management devices and practices; and

v. calibrating and verifying stormwater models.

2) The Permittee shall submit, as part of the Annual Report required under Part V.E of this permit, a brief narrative description of the Permittee’s monitoring results including relevant Excel spreadsheet with data tabulations, statistics, summary table(s) and graphics, by sampling site with receiving water location description including:

i. continuous flow data;

ii. sample analytical data identified as storm composite or grab with corresponding flows and storm events periods;

iii. estimate of storm event rainfall which generated the sampled discharge including approximate duration between the storm event sampled and the end of the previous measurable (greater than 0.10-inch rainfall) storm event;

iv. oading calculations: estimated annual and seasonal loads (total phosphorus, chloride, total suspended solids, volatile suspended solids, inorganic suspended solids by difference (TSS – VSS = ISS), total Kjeldahl nitrogen, and nitrate + nitrite nitrogen for the continuous monitoring stations;

v. summary information for each site including drainage area, and estimated annual total discharge volume, storm event discharge volume, runoff yield (inches/year), analyte flow weighted mean concentrations and analyte annual mean concentrations; and

vi. map showing monitoring locations and receiving water bodies.

d. The Permittee shall monitor water quality as described in Part V.C.7 of this permit at a minimum of ten sites. Monitoring of some sites may rotate for cost-effective resource use, however the Permittee shall make reasonable efforts to collect data from the same station in at least two consecutive years. The Permittee shall consider safety, backwatering effects and access in the choice and location of monitoring stations and monitoring activities. The monitored sites shall be chosen based on the following prioritization:

1) determining and improving effectiveness of the municipal separate storm sewer system and BMPs through adaptive management;

2) monitoring the largest outfall(s) to the Mississippi River;

3) monitoring of representative management areas to be defined by the Permittee; and

4) determining upstream jurisdiction’s contributions.

e. The Permittee shall, for those sites described in Part V.C.7.d.2 and 3, choose 5 sites that:

1) employ data loggers to record continuous flows over the non-ice time period (approximately March through November);

2) obtain flow-paced and grab samples for total phosphorus, chloride, total suspended solids, volatile suspended solids, inorganic suspended solids by difference (TSS – VSS = ISS), total Kjeldahl nitrogen, and nitrate + nitrite nitrogen for selected 0.10-inch or greater storm events, using reasonable efforts to:

i. monitor to characterize stormwater over a range of storm events and seasons; and

ii. monitor at least ten storm events annually.

3) perform grab sampling during the typical ice period winter thaw (approximately December to March) on at least two occasions.

f. For those sites described in Part V.C.7.e, the Permittee shall obtain, to the extent practicable (taking into consideration weather and safety), 15 samples per year over seasons and flows for loading calculation purposes monitor in accordance with the parameters established in Table 1. Instantaneous flows will be estimated at the time grab samples obtained.

Parameter	Sample Type	Frequency	Notes
BOD, Carbonaceous 5-Day (20 Deg C)	Composite or Grab	Quarterly
Chloride, Total	Composite or Grab	As noted for loading calculations (Part V.C.7.f)
Copper, Total (as Cu)	Composite or Grab	Monthly
E. coli	Grab	Quarterly
Flow	Measurement
Hardness, Carbonate (as CaCo3)	Composite or Grab	Monthly
Lead, Total (as Pb)	Composite or Grab	Monthly
Nitrite Plus Nitrate, Total (as N)	Composite	As noted for loading calculations (Part V.C.7.f)
Nitrogen, Ammonia, Un-ionized (as N)	Composite	Quarterly
Nitrogen, Kjeldahl, Total	Composite	As noted for loading calculations (Part V.C.7.f)
pH	Composite or Grab	Quarterly
Phosphorus, Total Dissolved or Ortho	Composite	Quarterly
Phosphorus, Total (as P)	Composite	As noted for loading calculations (Part V.C.7.f)
Precipitation	Measurement	1 x Day	Existing precipitation monitoring location to be defined by the Permittee such as Minneapolis-St. Paul International Airport.
Solids, Total Dissolved (TDS)	Composite	Quarterly
Solids, Total Suspended (TSS)	Composite	As noted for loading calculations (Part V.C.7.f)
Sulfate	Composite or Grab	2 x Year
Volatile Suspended Solids (VSS)	Composite	As noted for loading calculations (Part V.C.7.f)
Zinc, Total (as Zn)	Composite orGrab	Monthly

8. Section 303(d) listings.

Section 303(d) listings. If the Permittee has one or more Wasteload Allocations (WLAs) in a USEPA-approved TMDL, the Permittee shall select and implement a program of appropriate BMPs and measurable Minimum Control Measure-specific goals including schedules to meet the timeframes for the WLAs. At a minimum, the Permittee shall:

a. review the adequacy of the Stormwater Management Program to meet the TMDL’s WLA set for municipal stormwater. This review shall include:

1) identification of the watershed(s) that discharge(s) to the impaired water body;

2) identification of all outfalls and discharges to the impaired water body;

3) calculation of the municipal separate storm sewer system’s loading(s) of pollutant(s) of impairment to the impaired water body;

4) an assessment of existing BMPs and their effectiveness in meeting the TMDL’s WLA; and

5) an assessment of additional BMPs to be implemented to meet the WLA.

By June 30 of each calendar year, the permittee shall complete a review and, if needed, the Stormwater Management Program shall be modified demonstrating progress made or planned for all US-EPA approved WLAs assigned to the permittee prior to June 30 of the previous calendar year.

b. compare the estimate of the municipal separate storm sewer system’s loadings from Part V.C.8.a of this permit to the Permittee’s WLA for that impaired water body. The Permittee shall use method(s) for estimating the loading(s) that is (are) consistent with the method(s) used in the TMDL to estimate loads or methods approved by the Commissioner. The results of the comparison(s) shall be included in the Annual Report required in Part V.E of this permit.

c. modify the Stormwater Management Program, as appropriate, to meet the WLA including the estimated timeframe to complete implementation of additional BMPs necessary to meet the WLA if the Permittee is not meeting and is not making reasonable progress toward meeting the WLA. The estimated timeframe for implementation of additional BMPs needed to meet the WLA shall include scheduled actions in future permit cycles, if all additional BMPs and/or control measures cannot feasibly be implemented in the current permit cycle.

D. Modifications to the Stormwater Management Program. The Stormwater Management

Program may be modified by the Commissioner and/or the Permittee as established below.
1. The Commissioner may require the Permittee to modify the Stormwater Management Program as needed, and may consider the following factors:

a. Discharges from the storm sewer system are impacting the quality of receiving waters;

b. More stringent requirements are necessary to comply with new state or federal regulations; or

c. Additional conditions are deemed necessary to comply with requirements of the Clean Water Act or to protect or restore water quality.

2. Modifications required for the Stormwater Management Program by the Commissioner shall be requested in writing, setting forth schedules for compliance, and offering the Permittee the opportunity to propose alternative Stormwater Management Program modifications to meet the objectives of the requested modification. 3. The Permittee may modify the Stormwater Management Program in accordance with the following:

a. The Permittee’s request to the Commissioner shall:

1) be in writing;

2) identify the permit part (e.g. Part V.D.4 or 5) under which the request is being made;

3) describe the requested program modification;

4) discuss alternatives to the requested program modification;

5) include schedules for compliance; and

6) assure compliance with all requirements of this permit and all other applicable requirements of Minnesota and federal statutes and regulations.

b. Modifications that the Permittee wishes to make to the Stormwater Management Program, other than modifications under Parts V.D.4 and 5 below, must be approved by the Commissioner in accordance with the procedures of Minn. R. ch. 7001.

c. Modifications that the Permittee wishes to make to the Stormwater Management Program under Part V.D.5 below must be approved by the Commissioner in writing prior to modifying the Stormwater Management Program.

4. The Stormwater Management Program may be modified by the Permittee without prior approval of the Commissioner, provided the modification is in accordance with the following:

a. The Permittee proposes to add one or more BMP(s) and eliminate none from the Stormwater Management Program; or

b. A less effective BMP identified in the Stormwater Management Program is replaced with a more effective BMP. The alternate BMP shall address the same, or similar, concerns as the ineffective or failed BMP; and

c. The Commissioner and public are notified of the modification in the Annual Report for the year the modification is made. If a less effective BMP is replaced with a more effective BMP, the Permittee shall include in the notification a discussion of circumstance(s) and reason(s) for the replacement of the BMP.

5. Upon written approval of the Commissioner, the Permittee may modify the Stormwater Management Program to implement:

a. BMPs needed to make reasonable progress toward meeting one or more assigned WLA(s) as required under Part V.C.8.d of this permit, or

b. modifications to the Stormwater Management Program’s monitoring and analysis program in accordance with Part V.C.7 of this permit,

provided the proposed modifications are included in the Annual Report required under Part V.E of this permit and the public is provided prior notification and opportunity for comment through the Annual Report public notice and meeting required under Part V.C.1.f of this permit.

E. Annual Report

The Permittee shall submit an Annual Report. In accordance with the Reporting Requirements of Part VI.D of this permit, each Annual Report shall describe and discuss the implementation of the Stormwater Management Program for the previous calendar year. The Permittee shall hold a public meeting to discuss the Stormwater Management Program and Annual Report in accordance with the requirements of Part V.C.1.f of this permit.

F. Coordination and Cooperation with other Entities

The Permittee shall make reasonable efforts to cooperate with other city, county, state and local governmental entities in the overall stormwater management efforts in the drainage area. Examples of other entities which may directly or indirectly relate to stormwater management include the local fire departments, county household hazardous waste collection, Watershed Management Districts, Watershed Management Organizations, the Metropolitan Council, or the Department of Natural Resources. The Permittee shall report the ongoing coordinated activities and status of cooperative efforts in each Annual Report.