Phase II Municipal Separate Storm Sewer Systems (MS4) Comprehensive Master General Stormwater Permit MOR04C000

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 Phase II Municipal Separate Storm Sewer Systems Comprehensive MO-R04C000 master general permit.

• 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.
• Municipal Separate Storm Sewer System (MS4) Annual Stormwater Management Program for Comprehensive Permit (MOR04C) MO 780-3009

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.

• Standard Condition Part I - Effective Aug. 1, 2014
• Standard Condition Part I - Effective Nov. 1, 2013
• Standard Condition Part I - Effective Oct. 1, 1980

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. 

• Newly Permitted Facilities: The new plan for the facility must be prepared and implemented upon permit effective date. 
• Existing Permitted Facilities: The existing plan for the facility must be reviewed, revised as necessary, and implemented upon reissuance of permit coverage.
• 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 Phase II Municipal Separate Storm Sewer Systems Comprehensive MO-R04C000 master general permit.