This permit authorizes the discharge of stormwater that has not been impacted by wastewater from wood preservation chemicals or products to waters of the state. These facilities are engaged in wood preserving and treating operations. This permit covers wood preserving and treating operations using acid cooper chromate, ammoniacal cooper arsenate, ammoniacal cooper quat, ammoniacal copper zinc arsenate, borates, borax, chromated cooper arsenate, copper azole, copper naphthenate, creosote, micronized/ dissolved copper, oxine copper and pentachlorophenol. Facilities seeking to preserve or treat wood with chemicals other than those listed above must obtain approval from the department or may be required to obtain a site-specific permit.

This permit does not authorize discharge of effluent that has percolated through stockpiles of ash or biochar generated from the incineration of wood waste or any other similar waste materials. Facilities discharging all wastewater and stormwater directly to a combined sewer system connecting to a publicly owned treatment works that has consented to receive such a discharge are exempt from stormwater permitting requirements.

Visit the department's Municipal Separate Storm Sewer Systems website for additional information.

Length of Permit 

The department issues this general permit for a five-year period. The effective date is Sept. 1, 2020 and expires Aug. 31, 2025. If a facility applies for and receives this permit on June 1, 2023, their permit will expire Aug. 31, 2025.

Laws, Rules and Regulations

How to Apply

Applications

Fact Sheets

Fees

$200 annual permit fee

Timeline/ Process

The department must issue or deny a master general permit within 60 days of receiving the permit application. If a public notice is required as part of the process, the department will issue or deny the permit within 90 days of receiving the permit application. The department will request additional information if the application is not complete, which will delay the review process.

Public Participation

Public notification of the issuance of this general permit to an individual applicant is not required by state regulations. Public notices are issued on this master general permit every 5 years. The only exception to this rule, 10 CSR 20-6.020, is when a facility applies for the first time the following master general permits.

  • Airport
  • Chemical manufacturing
  • Fabricated structured metal
  • Foundries
  • Limestone and rock quarries
  • Lubricant manufacturing
  • Petroleum storage greater than 50,000 gallons
  • Wood treaters

The department shall review applications for general permits, operating permits or the renewal of operating permits to determine whether or not the permits should be issued. When all required and requested information has been received, the department shall prepare a draft permit and issue a 30-day public notice. The notice will be distributed by mail or email to all interested parties, posted on the department’s Public Notice webpage and circulated within the geographical areas of the proposed discharge.

The public may submit their written comments on the proposed permit to the department by mail, email or fax. The department will take into consideration and respond to all comments received during the public notice process. If significant water quality concerns are raised during the comment period, the department may decide to hold a public meeting to discuss the applications. The department does not have jurisdiction to address questions of zoning, location, property values or other non-water quality related items. Once all concerns have been addressed and the department meets all federal and state requirements, the department will issue or deny the permit within 60 days. 

Administrative Hearing Commission

Anyone who is adversely affected by the director's decision to issue, deny, suspend or revoke a permit must appeal within 30 days of the decision to the Administrative Hearing Commission as provided by 621.250.3 RSMo. All appeals must be filed by petition and send to:

Administrative Hearing Commission
PO Box 1557
Jefferson City, MO 65102
Phone: 573-751-2422
Fax: 573-751-5018
Website: Administrative Hearing Commission

Requirements

Reporting

Permittees may be required to submit monitoring reports and meet sampling requirements. The number of reports and samples and timeline to submit documents may vary depending on the type of facility, processes, discharges and activities. A detailed list of these requirements are included within the Wood Treaters Master General Stormwater Permit MOR22B000.

  • The facility must register in the department’s eDMR system through the Missouri Gateway for Environmental Management (MoGEM) before the first report may be due.
  • Spill reporting: any emergency involving a hazardous substance must be reported to the department’s 24-hour Environmental Emergency Response hotline at 573-634-2436 at the earliest practicable moment after discovery. These reporting requirements apply when the spill results in chemicals or materials leaving the permitted property or reaching waters of the state.
  • The permittee shall give notice to the department as soon as possible of any planned physical alterations or additions to the permitted facility when the alteration or addition could significantly change the nature or increase the quantity of pollutants in the discharge. The permittee shall also notify the alteration or addition results in a significant change in disposal practices and may justify the application of permit conditions different from or absent in the current permit.
  • Reporting Non-detects: The permittee shall not report a sample result as “non-detect” without also reporting the method detection limit or the highest reporting limit; whichever is higher.

Standard Condition Part I

This document of standard conditions incorporate permit conditions as required by 40 CFR 122.41 or applicable state statues or regulations.  These minimum conditions include sampling, monitoring and recording; reporting requirements; bypass and upset requirements; and administrative requirements.

Stormwater Pollution Prevention Plan

This permit requires the development and implementation of a Stormwater Pollution Prevention Plan. The plan must be updated as necessary to reflect the most current and accurate conditions on site. The plan must be kept onsite (either electronically or paper copy) and be made readily available to the department upon request and within 24 hours, unless explicitly granted more time in writing. The facility must also keep a schedule for monthly site inspections and a brief written report including observations and analysis of best management practice effectiveness, deficiencies and corrective action taken. The facility’s plan must be reviewed at least annually but more frequently if site conditions impacting stormwater or the nature and condition of stormwater discharges change. The plan should not be sent to the department unless specifically requested.

  • Existing Permitted Facilities: The existing plan for the facility must be reviewed, revised as necessary, and implemented upon reissuance of permit coverage.
  • Newly Permitted Facilities: The new plan for the facility must be prepared and implemented upon permit effective date.
  • Expanding Facilities: The existing plan for the facility, including the alternative analysis, must be reviewed and revised as necessary. Once expansion occurs the revised plan must be implemented upon effective date of facility expansion.

A log of each inspection and copy of the inspection report shall be kept readily accessible and must be made available upon request by the department. Electronic logs are acceptable as long as reports can be provided within 24 hours. If inspection reports are kept off-site, the stormwater pollution prevention plan must indicate where they are stored.

Any structural or maintenance deficiencies for best management practices or stabilization measures shall be documented and corrected as soon as possible but no more than 7 calendar days after the inspection.  A detailed list of these requirements and more are included within the Wood Treaters Master General Stormwater Permit MOR22B000.

Renewal

Unless terminated, the permittee shall submit the permit application listed above no later than 180 days prior to the permit’s expiration date for renewal. As part of the application, permittees shall submit their written Stormwater Management Plan including any implementation schedules as part of the permit.

When a facility submits a timely and complete application and the department is unable through no fault of the permittee to issue a renewed permit prior to expiration of the previous permit. The terms and conditions of the expired permit are administratively continued and will remain fully effective and enforceable until such time when a permit action is taken. Failure to submit a renewal application is a violation of the Missouri Clean Water Law.

Resources

Wastewater Construction Permit

This master general permit does not cover construction activities that may be required as part of the project. If you plan to construct, install or modify any earthen basin, collection system or wastewater treatment facility, you may be required to obtain a Wastewater Construction Permit.

Land Disturbance Permit

This master general permit does not cover land disturbance activities or construction of earthen basins. Land disturbance activities disturbing one or more acres of total area for the entire project or less than one acre for sites that are part of a common promotional plan of development may require a land disturbance permit.

Major Water User

Any surface or groundwater user with a water source and the equipment necessary to withdraw or divert 100,000 gallons (or 70 gallons per minute) or more per day combined from all sources from any stream, river, lake, well, spring or other water source is considered a major water user in Missouri. All major water users are required by law to register water use annually. 

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