Plan before Notice of Intent
An SWP3 must be prepared prior to submission of an NOI.
An SWP3 must be prepared prior to submission of an NOI. The SWP3 must be kept up-to-date throughout coverage under this permit.
Oklahoma
SWPPP requirements in Oklahoma
Oklahoma issues its own construction general permit. We have read General Permit OKR10 for Stormwater Discharges from Construction Activities Within the State of Oklahoma and list below the requirements we could cite to it, with the scope limits stated plainly. Screen your own acreage further down.
Who may prepare the plan
No preparer credential foundNo preparer credential was found for Oklahoma. On what we have verified, a generated plan can be adopted by the operator without a credentialed signature. Local ordinances can still be stricter than state law.
The permit states it explicitly: use of a licensed PE for plan preparation is not required. OKR10 Part 5.1.B.
No permit section cited. Confirm this with your permitting authority.
Coverage trigger
Worked through at 3 acres
The project disturbs 3 acres, at or above the 1 acre threshold, so it needs permit coverage.
The trigger people miss is the second one. A half acre lot inside a 40 acre subdivision is covered, because the larger common plan of development or sale is what counts, not the lot.
Read these before you act on the answer
- Requirements below are what we have read and cited directly from General Permit OKR10 for Stormwater Discharges from Construction Activities Within the State of Oklahoma, not the federal CGP. A category we have not yet transcribed from this permit is omitted here rather than assumed to match EPA's rule.
- Oklahoma's actual OPDES construction stormwater general permit number is OKR10, not OKR100000 as initially assumed. The currently effective document is OKR10's second modification, effective November 1, 2023 (original issuance October 18, 2022). OK's coverage threshold matches the federal 1-acre floor. OK's stabilization COMPLETION deadline is tiered by 'High Priority Construction Site' status (40+ disturbed acres, or discharge within 1 mile of an impaired/ARC/ORW/TMDL water), not by a simple acreage split, so it was modeled as a new state.ok id. No arid/semi-arid/drought-based reduced inspection frequency was found; OK's only reduced-frequency rule is stabilization-status-based. Numeric effluent limits found apply only to asphalt batch plant construction-support activities, not general construction discharges.
- No preparer credential was found for Oklahoma. On what we have verified, a generated plan can be adopted by the operator without a credentialed signature. Local ordinances can still be stricter than state law.
- Basinwise does not perform the physical site inspections the permit requires. Those must be carried out on site by a qualified person.
What the permit requires of a Oklahoma site
Worked for a three acre site with the receiving water unconfirmed. Each line says why it attached to this site rather than in general. Check the notes above for the site sizes this permit does not cover.
Filing
Notice of Intent deadline
14Submit an NOI at least 14 days prior to commencing construction activities.
Why this applies here: This is the deadline for a new site. A transfer to a new operator or an emergency related project has a different deadline.
Operators of new construction projects/activities that commence after the effective date of this permit must submit an NOI at least 14 days prior to commencing construction activities.
Notice of Termination deadline
30A complete NOT must be submitted within 30 days if a termination condition has been met.
A complete NOT (DEQ Form 606-003) must be submitted to DEQ within 30 days if one or more of the following conditions have been met
Inspections
Inspection frequency, option 2
14At a minimum, conduct a site inspection once every 14 calendar days and within 24 hours of the end of a storm event of 0.5 inches or greater.
Why this applies here: You have not confirmed whether the site discharges to an impaired or high quality water. If it does, the increased frequency applies instead and this answer changes.
At a minimum, you must conduct a site inspection once every 14 calendar days and within 24 hours of the end of a storm event of 0.5 inches or greater and within 24 hours of a discharge generated by snowmelt, unless you are discharging from a high priority site subject to Part 4.6.B.4.
Who may inspect
Those who are knowledgeable in the principles and practice of erosion and sediment controls and pollution prevention, who possess the skills and training to assess conditions at the construction site that could impact stormwater quality.
Why this applies here: This is why Basinwise cannot perform your inspections. The permit requires a trained person physically on the site.
Qualified Person or Qualified Personnel means those (either the operator's employees or outside personnel) who are knowledgeable in the principles and practice of erosion and sediment controls and pollution prevention, who possess the skills and training to assess conditions at the construction site that could impact stormwater quality.
Stabilisation
Initiate stabilisation
Initiate the installation of stabilization measures immediately in any disturbed areas where construction activities have permanently ceased or will be temporarily inactive for 14 or more calendar days.
Why this applies here: This applies at both land disturbance amounts.
Initiate the installation of stabilization measures immediately in any disturbed areas on any portion of the site where construction activities have permanently ceased or will be temporarily inactive for 14 or more calendar days.
Corrective action
Corrective action, major fix
7Install a new or modified control and make it operational, or complete the repair, by no later than 7 calendar days from the time of discovery.
You must install a new or modified control and make it operational, or complete the repair, by no later than seven calendar days from the time of discovery.
Buffers
Natural buffer
50Maintain a natural buffer zone of at least 50 feet between disturbed areas and perennial/intermittent streams, creeks, rivers, lakes, ephemeral streams, or drainages.
When any waters of the state are located on or immediately adjacent to the site... you must maintain a natural buffer zone or equivalent erosion and sediment controls... The minimum width of the buffer is outlined in Table 4-1.
Records you must keep
Inspection report deadline
24Complete an inspection report within 24 hours of completing any site inspection.
You must complete an inspection report within 24 hours of completing any site inspection.
Corrective action log entries
Within 24 hours of discovering a corrective-action triggering condition, provide a record of the condition and how it was identified.
Within 24 hours of discovering the occurrence of one of the triggering conditions in Part 5.5.A.1 at your site, you must provide a record of the following: a. Which triggering condition was identified at your site.
Record retention
3Retain SWP3, all reports, and NOI data for at least 3 years from the date the site is finally stabilized.
Why this applies here: The clock runs from permit expiry or termination, not from when the record was written, so on a multi year project every record stays live for the whole project plus three years.
The permittee shall retain copies of the SWP3 and all reports required by this permit, and records of all data used to complete the NOI to be covered by this permit, for a period of at least three years from the date that the site is finally stabilized.
Screen a Oklahoma site now
Your acreage, your receiving water, your answer. Runs in your browser, nothing is transmitted.
What a plan has to cover, under the federal permit
This is EPA's list, from the 2022 Construction General Permit. It does NOT govern in Oklahoma, where the state issues its own permit and sets its own contents. It is here as a shape to expect, not as the requirement you will be held to.
General SWPPP requirementPart 7.1Verified
- All operators associated with a construction site under this permit must develop a SWPPP consistent with Part 7 prior to their submittal of the NOI. The SWPPP must be kept up-to-date throughout coverage under this permit. If a SWPPP was prepared under a previous version of this permit, the operator must review and update it before submitting an NOI.
All Site OperatorsPart 7.2.1Verified
- Include a list of all other operators who will be engaged in construction activities at the site, and the areas of the site over which each operator has control.
Stormwater TeamPart 7.2.2Verified
- Identify the personnel (by name and position) on the stormwater team pursuant to Part 6.1, their individual responsibilities, and which members are responsible for conducting inspections. Include verification that each member has received the Part 6.2 training, and documentation that inspection personnel have received the Part 6.3 training (EPA inspector training certificates, or documentation of a current non-EPA program certification plus confirmation the program satisfies the Part 6.3b minimum elements).
Nature of Construction ActivitiesParts 7.2.3a - 7.2.3iVerified
- A description of the nature of your construction activities, including the age or dates of past renovations for structures undergoing demolition
- The size of the property (in acres, or length in miles if a linear construction site)
- The total area expected to be disturbed by the construction activities (to the nearest quarter acre, or nearest quarter mile if a linear construction site)
- A description of any on-site and off-site construction support activity areas covered by this permit
- The maximum area expected to be disturbed at any one time, including on-site and off-site construction support activity areas
- A description and projected schedule for: commencement of construction activities in each portion of the site (clearing and grubbing, mass grading, demolition, site preparation, final grading, and creation of soil and vegetation stockpiles requiring stabilization); temporary or permanent cessation of construction activities in each portion; temporary or final stabilization of exposed areas for each portion; and removal of temporary stormwater controls and construction equipment or vehicles and cessation of construction-related pollutant-generating activities
- A list and description of all pollutant-generating activities on the site, with an inventory of pollutants or pollutant constituents associated with each, taking into account where potential spills and leaks could occur and any known hazardous or toxic substances such as PCBs and asbestos that will be disturbed or removed
- Business days and hours for the project
- If conducting construction activities in response to a public emergency, a description of the cause of the emergency, information substantiating its occurrence (e.g. a State disaster declaration), and a description of the construction necessary to reestablish affected public services
Site MapParts 7.2.4a - 7.2.4kVerified
- Boundaries of the property
- Locations where construction activities will occur, including: locations of earth-disturbing activities (noting any phasing) including demolition; approximate slopes before and after major grading (noting any steep slopes); locations where sediment, soil or other construction materials will be stockpiled; any receiving water crossings; designated points where vehicles will exit onto paved roads; locations of structures and other impervious surfaces upon completion; and locations of on-site and off-site construction support activity areas
- Locations of any receiving waters within the site and all receiving waters within one mile downstream of the site's discharge point(s), identifying whether any are listed as impaired or identified as a Tier 2, Tier 2.5 or Tier 3 water
- Any areas of Federally listed critical habitat within the action area of the site
- Type and extent of pre-construction cover on the site (e.g. vegetative cover, forest, pasture, pavement, structures)
- Drainage patterns of stormwater and authorized non-stormwater before and after major grading activities
- Stormwater and authorized non-stormwater discharge locations, including discharges to storm drain inlets (noting whether the inlet conveys stormwater to a sediment basin, sediment trap or similarly effective control), discharges directly to receiving waters, and locations where turbidity benchmark monitoring will take place
- Locations of all potential pollutant-generating activities identified in Part 7.2.3g
- Designated areas where construction wastes covered by the Part 2.3.3e.ii exception will be stored
- Locations of stormwater controls, including natural buffer areas and any shared controls utilized to comply with this permit
- Locations where polymers, flocculants or other treatment chemicals will be used and stored
Non-Stormwater DischargesPart 7.2.5Verified
- Identify all authorized non-stormwater discharges in Part 1.2.2 that will or may occur.
Procedures for Inspection, Maintenance, and Corrective ActionParts 7.2.7a - 7.2.7eVerified
- The inspection schedule you will follow, based on whether your site is subject to Part 4.2 or Part 4.3, or whether it qualifies for any of the reduced inspection frequencies in Part 4.4
- If conducting inspections under Part 4.2.2, Part 4.3 or Part 4.4.1b, the location of the rain gauge or the address of the weather station you will use to obtain rainfall data
- If reducing your inspection frequency in accordance with Part 4.4.1b, the beginning and ending dates of the seasonally defined arid period for your area or the valid period of drought
- If reducing your inspection frequency in accordance with Part 4.4.3, the beginning and ending dates of frozen conditions on your site
- Any maintenance or inspection checklists or other forms that will be used
Procedures for Turbidity Benchmark Monitoring from Dewatering Discharges (if applicable)Part 7.2.8Verified
- If required to comply with the Part 3.3 turbidity benchmark monitoring requirements, describe the procedures you will follow to collect and evaluate samples, report results to EPA, keep records of monitoring information, and take corrective action when necessary. Include the specific type of turbidity meter you will use and any manuals or manufacturer instructions on how to operate and calibrate it. Describe any coordinating arrangement with other permitted operators on the same site, including which parties are tasked with specific responsibilities. If EPA has approved an alternate turbidity benchmark, include the data and documentation relied on to request it.
Compliance with Other RequirementsParts 7.2.9a - 7.2.9cVerified
- Threatened and Endangered Species Protection: include the documentation required in the Endangered Species Protection section of the NOI in NeT, or the ESA worksheet in Appendix D, supporting your eligibility
- Historic Properties: include the documentation required in Appendix E supporting your eligibility with regard to the protection of historic properties
- Safe Drinking Water Act Underground Injection Control (UIC) requirements: if using infiltration trenches, commercially manufactured pre-cast or pre-built proprietary subsurface detention vaults/chambers/devices designed to capture and infiltrate stormwater, or drywells, seepage pits or improved sinkholes, document any contact with the applicable State agency or EPA Regional Office responsible for underground injection wells. Such controls would generally be considered Class V UIC wells
SWPPP CertificationPart 7.2.10Verified
- Your signatory must sign and date your SWPPP in accordance with Appendix G, Part G.11.
Post-Authorization Additions to the SWPPPParts 7.2.11a - 7.2.11cVerified
- A copy of your NOI submitted to EPA along with any correspondence exchanged between you and EPA related to coverage under this permit
- A copy of the acknowledgment letter you receive from NeT assigning your NPDES ID (i.e. permit tracking number)
- A copy of this permit (an electronic copy easily available to the stormwater team is also acceptable)
Read the permit itself at the source document.
What people ask about SWPPP requirements in Oklahoma
What are the SWPPP requirements in Oklahoma?
Oklahoma issues its own construction general permit, and we have read General Permit OKR10 for Stormwater Discharges from Construction Activities Within the State of Oklahoma. The requirements listed on this page, such as inspection frequency, who may inspect, stabilisation, corrective action and record retention, are cited to that permit rather than to EPA's. Anything we have not transcribed is left out instead of assumed to match the federal rule, and the scope note on this page says which sites the permit does not cover. Confirm the current permit and any site-size variant with Oklahoma Department of Environmental Quality (Oklahoma DEQ).
Who may prepare a SWPPP in Oklahoma?
No preparer credential was found for Oklahoma. On what we have verified, a generated plan can be adopted by the operator without a credentialed signature. Local ordinances can still be stricter than state law.
How often must a Oklahoma site be inspected?
The inspection frequency is set by the Oklahoma construction general permit, which we have not read. Confirm it with Oklahoma Department of Environmental Quality (Oklahoma DEQ).
The permit makes you keep the record, not just know the answer
Screening is free. Pro generates the site specific plan document and retains the inspection and corrective action log.