7 - Storm Water Pollution Prevention Plan (SWPPP)

7. Storm Water Pollution Prevention Plan (SWPPP)

7.1. Requirement to develop a SWPPP prior to submitting an NOI.

All permittees and their contractors with a construction project to be covered under this permit must develop a SWPPP.

The Permittee is required to develop the site's SWPPP prior to submitting the NOI. The SWPPP must include at a minimum the information required in section 7.2. and as specified in other sections of this general permit and any other information as requested by the director. The permittee shall also update the SWPPP as required in section 7.4.

If a Site Specific Construction Best Management Practices (SSCBMP) Plan was previously developed for coverage under a previous version of this general permit, the permittee shall review and update the SSCBMP Plan to ensure that requirements of this permit's SWPPP are addressed prior to submitting the NOI.

7.2. SWPPP Contents

The SWPPP must include the following information, at a minimum.

7.2.1. Storm water team.

The permittee shall assemble and oversee a "storm water team," which is responsible for the development of the SWPPP, any later modifications to it, and for compliance with the requirements in this permit.

The SWPPP must identify the personnel (by name or position) that are part of the storm water team, as well as their individual responsibilities. Each member of the storm water team must have ready access to an electronic or paper copy of applicable portions of this permit, the most updated copy of the SWPPP, and other relevant documents or information that must be kept with the SWPPP.

7.2.2. Nature of construction activities.

The SWPPP must describe the nature of the construction activities, including the size of the project site (in acres) and the total area expected to be disturbed by the construction activities (in acres), construction support activity areas covered by this permit (see section 5), and the maximum area expected to be disturbed at any one time.

7.2.3. Emergency-related projects.

If conducting earth-disturbing activities in response to a public emergency (see section 1.3.), the permittee shall document the cause of the public emergency (e.g., natural disaster, extreme flooding conditions, etc), information substantiating its occurrence (e.g., state emergency proclamation or similar state proclamation), and a description of the construction necessary to reestablish effected public services. The proclamation of a civil defense emergency or similar proclamation is required to be from the President of the United States or State Governor.

7.2.4. Identification of other site contractors.

The SWPPP must include a list of all other contractors (e.g., sub-contractors) who will be engaged in construction activities at the site, and the areas of the site over which each contractor has control.

Note: The department acknowledges that a list of all other contractors might not be available at the time the SWPPP and NOI are submitted. If that is the case, then the SWPPP must be amended to include the information required in Section 7.2.4 prior to the start of construction activities.

7.2.5. Sequence and estimated dates of construction activities.

The SWPPP must include a description of the intended sequence of construction activities, including a schedule of the estimated start dates and the duration of the activity, for the following activities:

Installation of storm water control measures, and when they will be made operational, including an explanation of how the sequence and schedule for installation of storm water control measures complies with section and of any departures from manufacturer specifications pursuant to section, including removal procedures of the storm water control measures after construction has ceased;

Commencement and duration of earth-disturbing activities, including clearing and grubbing, mass grading, site preparation (i.e., excavating, cutting and filling), final grading, and creation of soil and vegetation stockpiles requiring stabilization;

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

Final or temporary stabilization of areas of exposed soil. The dates for stabilization must reflect the applicable deadlines to which the permittee is subject to in section 5.2.1,; and


Removal of temporary storm water conveyances/channels and other storm water control measures, removal of construction equipment and vehicles, and cessation of any pollutant-generating activities.

Note: If plans change due to unforeseen circumstances or for other reasons, the requirement to describe the sequence and estimated dates of construction activities is not meant to "lock in" the permittee or contractor to meeting these projections. When departures from initial projections are necessary, this should be documented in the SWPPP itself or in associated records, as appropriate.

7.2.6. Site map.

The SWPPP must include a legible site map, or series of maps, showing the following features of the project:

Note: Included in the project site are any construction support activities covered by this permit (see section 5).

Boundaries of the property and of the locations where construction activities will occur, including:

a. Locations where earth-disturbing activities will occur, noting any sequencing of construction activities;

b. Approximate slopes before and after major grading activities and drainage patterns with flow arrows. Note areas of steep slopes, as defined in section;

c. Locations where sediment, soil, or other construction materials will be stockpiled;

d. Locations of any contaminated soil or contaminated soil stockpiles;

e. Locations of any crossings of state waters;

f. Designated points on the site where vehicles will exit onto paved roads;

g. Locations of structures and other impervious surfaces upon completion of construction; and

h. Locations of construction support activity areas covered by this permit (see section 5).

Locations of all state waters, including wetlands, that exist within or in the immediate vicinity of the site and indicate which waterbodies are listed as impaired;

The boundary lines of any natural buffers provided consistent with section;

Topography of the site, existing vegetative cover and features (e.g., forest, pasture, pavement, structures), and drainage pattern(s) of storm water onto, over, and from the site property before and after major grading activities;

Storm water discharge locations, including:

a. Locations of any storm drain inlets on the site and in the immediate vicinity of the site to receive storm water runoff from the project;[and]

b. Locations where storm water will be discharged to state waters (including wetlands);and

c. Locations where storm water will exit the site.

Locations of all potential pollutant-generating activities identified in section 7.2.7.;

Locations of storm water control measures; and

Locations where chemicals will be used and stored.

7.2.7. Construction site pollutants.

The SWPPP must include the following:

a. A list and description of all the pollutant-generating activities on the site.

b. For each pollutant-generating activity, an inventory of pollutants or pollutant constituents (e.g., sediment, fertilizers and/or pesticides, paints, solvents, fuels) associated with that activity, which could be exposed to rainfall and could be discharged from the construction site. The permittee shall take into account where potential spills and leaks could occur that contribute pollutants to storm water discharges. The permittee shall also document any departures from the manufacturer's specifications for applying fertilizers containing nitrogen and phosphorus, as required in section

7.2.8. Sources of non-storm water.

The SWPPP must also identify all sources of non-storm water and information, including, but not limited to, the design, installation, and maintenance of the control measures to prevent its discharge.

7.2.9. Buffer documentation.

If the permittee is required to comply with section because a state water is located within 50 feet of the project's earth disturbances, the permittee shall describe which compliance alternative the permittee has selected for the site, and comply with any additional requirements to provide documentation in section

7.2.10. Description of storm water control measures. Storm water control measures to be used during construction Activity.

The SWPPP must describe all storm water control measures that are or will be installed and maintained at the site to meet the requirements of section 5, For each storm water control measure, the permittee must document:

a. Information on the type of storm water control measure to be installed and maintained, including design information;

b. What specific sediment controls will be installed and made operational prior to conducting earth-disturbing activities in any given portion of the site to meet the requirement of section

c. If contaminated soil exists on-site, the control measures to either prevent the contact of storm water with the contaminated soil, including any contaminated soil stockpiles, or prevent the discharge of any storm water runoff which has contacted contaminated soil or any contaminated soil stockpiles;

d. For exit points on the site, document stabilization techniques the permittee will use and any additional controls that are planned to remove sediment prior to vehicle exit consistent with section; and

e. For linear projects, where the permittee has determined that the use of perimeter controls in portions of the site is impracticable, document why the permittee believes this to be the case (see section Stabilization practices.

The SWPPP must describe the specific vegetative and/or non-vegetative practices that will be used to comply with the requirements in section 5.2., including if the permittee will be complying with the stabilization deadlines specified in section The permittee shall document the circumstances that prevent the permittee from meeting the deadlines specified in sections and/or Post construction measures.

Descriptions of measures that will minimize the discharge of pollutants via storm water discharges after construction operations have been finished. All projects require post construction BMPs to minimize the discharge of pollutants via storm water discharges after construction operations have been finished. Examples include: open, vegetated swales and natural depressions; structures for storm water retention, detention, or recycle; velocity dissipation devices to be placed at the outfalls of detention structures or along with the length of outfall channels; and other appropriate measures.

7.2.11 Pollution prevention procedures. Spill prevention and response procedures.

The SWPPP must describe procedures that the permittee will follow to prevent and respond to spills and leaks consistent with section 5.3., including:

a. Procedures for expeditiously stopping, containing, and cleaning up spills, leaks, and other releases. Identify the name or position of the employee(s) responsible for detection and response of spills or leaks; and

b. Procedures for notification of appropriate facility personnel, emergency response agencies, and regulatory agencies where a leak, spill, or other release containing a hazardous substance or oil in an amount equal to or in excess of a reportable quantity consistent with section 5.3.4. and established under either 40 CFR Part 110, 40 CFR Part 117, or 40 CFR Part 302, occurs during a 24-hour period. Contact information must be in locations that are readily accessible and available.

The permittee may also reference the existence of Spill Prevention Control and Countermeasure (SPCC) plans developed for the construction activity under Part 311 of the CWA, or spill control programs otherwise required by an NPDES permit for the construction activity, provided that the permittee keeps a copy of that other plan onsite.

Note: Even if the permittee already has an SPCC or other spill prevention plan in existence, the plans will only be considered adequate if they meet all of the requirements of this section, either as part of the existing plan or supplemented as part of the SWPPP. Waste management procedures.

The SWPPP must describe procedures for how the permittee will handle and dispose of all wastes generated at the site, including, but not limited to, clearing and demolition debris, sediment removed from the site, construction and domestic waste, hazardous or toxic waste, and sanitary waste.

7.2.12. Procedures for inspection, maintenance, and corrective action.

The SWPPP must describe the procedures the permittee will follow for maintaining the storm water control measures, conducting site inspections, and, where necessary, taking corrective actions, in accordance with section, section 5.3.2., section 9, and section 10 of the permit. The following information must also be included in the SWPPP:

a. Personnel responsible for conducting inspections;

b. The inspection schedule the permittee will be following, which is based on whether the site is subject to section 9.1.2. or section 9.1.3., and whether the site qualifies for any of the allowances for reduced inspection frequencies in 9.1.4. If the permittee will be conducting inspections in accordance with the inspection schedule in section 9.1.2.a. or section 9.1.2.b., the location of the rain gauge on the site or the address of the weather station the permittee will be using to obtain rainfall data; and

c. Any inspection or maintenance checklists or other forms that will be used.

7.2.13. Staff training.

The SWPPP must include documentation that the required personnel were trained in accordance with the following:

Prior to the commencement of earth-disturbing activities or pollutant-generating activities, whichever occurs first, the permittee shall ensure that the following personnel understand the requirements of this permit and their specific responsibilities with respect to those requirements:

a. Personnel who are responsible for the design, installation, maintenance, and/or repair of storm water controls (including pollution prevention measures);

b. Personnel responsible for the application and storage of chemicals (if applicable);

c. Personnel who are responsible for conducting inspections as required in Part 4.1.1; and

d. Personnel who are responsible for taking corrective actions as required in Part 5.

Notes: (1) If the person requiring training is a new employee, who starts after the permittee commences earth-disturbing or pollutant-generating activities, the permittee shall ensure that this person has the proper understanding as required above prior to assuming particular responsibilities related to compliance with this permit. (2) For emergency-related construction activities, the requirement to train personnel prior to commencement of earth-disturbing activities does not apply, however, such personnel must have the required training prior to NOI submission.

The permittee is responsible for ensuring that all activities on the site comply with the requirements of this permit. The permittee is not required to provide or document formal training for subcontractors or other outside service providers, but must ensure that such personnel understand any requirements of the permit that may be affected by the work they are subcontracted to perform.

At a minimum, personnel must be trained to understand the following if related to the scope of their job duties (e.g., only personnel responsible for conducting inspections need to understand how to conduct inspections):

a. The location of all storm water controls on the site required by this permit, and how they are to be maintained;

b. The proper procedures to follow with respect to the permit's pollution prevention requirements; and

c. When and how to conduct inspections, record applicable findings, and take corrective actions.

7.2.14. Documentation of compliance with Safe Drinking Water Act Underground Injection Control (UIC) requirements for certain subsurface storm water controls.

If using any of the following storm water controls at the site, as they are described below, the permittee must document any contact with the department's Safe Drinking Water Branch for implementing the requirements for underground injection wells in the Safe Drinking Water Act and EPA's implementing regulations at 40 CFR Parts 144 -147. Such controls would generally be considered Class V UIC wells:

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

b. Commercially manufactured precast or pre-built proprietary subsurface detention vaults, chambers, or other devices designed to capture and infiltrate storm water flow; and

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

7.2.15. Information to be included in the SWPPP prior to the start of construction activities. Contractor information.

The following contractor (general and subcontractors) information shall be included in the SWPPP: legal name, street address, contact person's name and position title, telephone number, and email address. Other state, federal, or county permits.

The following are required to be included in the SWPPP prior to the start of construction activities, if applicable:

a. Copy of the drainage system owner's approval allowing the discharge to enter their drainage system;

b. Copy of the county-approved grading permit;

c. Copy of the department of the army permit and section 401 water quality certification; and

d. A list of other permits.

7.2.16. Any other information as requested by the director.

7.2.17. SWPPP certification.

The certifying person or duly authorized representative must certify, sign, and date the SWPPP in accordance with section 15 of appendix A, chapter 11-55.

7.2.18. Post-authorization additions to the SWPPP.

After the issuance of the NGPC the permittee shall include the following documents as part of the SWPPP:

a. A copy of the NOI submitted to the department along with any correspondence exchanged between the permittee and the department related to coverage under this permit;

b. A copy of the NGPC and all attachments included with the NGPC (an electronic copy easily available to the storm water team is also acceptable).

7.3. On-site availability of the SWPPP.

The permittee is required to keep a current hard or electronic copy of the SWPPP at the site or at an easily accessible location so that it can be made available at the time of an on-site inspection or upon request by the department; EPA; or local agency approving storm water management plans; the operator of a storm water drainage system receiving discharges from the site; or representatives of the U.S. Fish and Wildlife Service (USFWS) or the National Marine Fisheries Service (NMFS).

The department may provide access to portions of the SWPPP to a member of the public upon request. Confidential Business Information (CBI) will be withheld from the public, but may not be withheld from EPA, USFWS, or NMFS.

Note: Information covered by a claim of confidentiality will be disclosed by the department only to the extent of, and by means of, the procedures set forth in 40 CFR Part 2, Subpart B. In general, submitted information protected by a business confidentiality claim may be disclosed to other employees, officers, or authorized representatives of the United States concerned with implementing the CWA. The authorized representatives, including employees of other executive branch agencies, may review CBI during the course of reviewing draft regulations.

If an onsite location is unavailable to keep the SWPPP when no personnel are present, notice of the plan's location must be posted near the main entrance of the construction site.

7.4. Required SWPPP modifications.

7.4.1. List of conditions requiring SWPPP modification.

The permittee shall modify the SWPPP, including the site map(s), in response to any of the following conditions:

Whenever new contractors become active in construction activities on the site, or changes are made to the construction plans, storm water control measures, pollution prevention measures, or other activities at the site that are no longer accurately reflected in the SWPPP. This includes changes made in response to corrective actions triggered under section 10;

To reflect areas on the site map where operational control has been transferred (and the date of transfer) since initiating permit coverage;

If inspections or investigations by site staff, or by local, state, or federal officials determine that SWPPP modifications are necessary for compliance with this permit;

Where the department determines it is necessary to impose additional requirements on the discharge, the following must be included in the SWPPP:

a. A copy of any correspondence describing such requirements; and

b. A description of the storm water control measures that will be used to meet such requirements.

To reflect any revisions to applicable federal, state, and local requirements that affect the storm water control measures implemented at the site.

7.4.2. Deadlines for SWPPP modifications.

The permittee shall complete required revisions to the SWPPP within 7 calendar days following the occurrence of any of the conditions listed in section 7.4.1.

7.4.3. SWPPP modification records.

The permittee shall maintain records showing the dates of all SWPPP modifications. The records must include a signature of the person authorizing each change (see section 7.2.17. above), date, and a brief summary of all changes.

7.4.4. Certification requirements.

All modifications made to the SWPPP consistent with section 7.4. must be certified, signed, and dated by the Certifying Person that meets the requirements in section 15 of appendix A, chapter 11-55 or the duly authorized representative that meets the requirements of 11-55-07(b).

7.4.5. Required notice to other contractors.

Upon determining that a modification to the SWPPP is required, if there are multiple contractors covered under this permit, the permittee shall immediately notify any contractors who may be impacted by the change to the SWPPP.

The following state regulations pages link to this page.