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Louisiana

SWPPP requirements in Louisiana

Louisiana issues its own construction general permit. We have read Storm Water General Permit for Large Construction Activities (LAR100000) 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 found

No preparer credential was found for Louisiana. 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.

No preparer credential found in the reviewed sources. Not exhaustively verified; confirm with the state agency and any local ordinance.

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 Storm Water General Permit for Large Construction Activities (LAR100000), 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.
  • Direct fetch of the live deq.louisiana.gov PDF returned HTTP 403; the operative permit text was verified via a Wayback Machine capture cross-checked against PDF metadata (CreationDate 2024-09-26). No explicit 'Effective Date' line was found; 2024-10-01/2029-09-30 are derived from the reauthorization clause and the permit's 5-year-term rule, so mark as strong-inference rather than directly quoted. This permit (LAR100000) covers only construction activity disturbing 5+ acres; Louisiana also has a separate small-construction general permit (LAR200000, 1-<5 acres) not verified in this session. Contains no numeric effluent limits/benchmarks (explicitly a 'non-numeric limitations' permit). No fixed day-count deadline for NOT filing was found -- termination is condition-based/automatic, so deadline.not.submission is omitted.
  • No preparer credential was found for Louisiana. 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 Louisiana 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

Plan before Notice of Intent

The SWPPP shall be completed prior to the submittal of an NOI to be covered under this permit (except as provided in Part II.A.5) and updated as appropriate.

Be completed prior to the submittal of an NOI to be covered under this permit (except as provided in Part II.A.5) and updated as appropriate; and
VerifiedPart IV, Section A, Item 1Source
Notice of Intent deadline

An initial complete and accurate NOI, with fee payment, must be received by LDEQ's Water Permits Division prior to the commencement of construction activities. Louisiana's rule states 'prior to commencement' with no fixed advance-notice day count.

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.

for parties required to obtain permit authorization, defined above in Part I.B.1, an initial complete and accurate NOI with payment of the annual maintenance and surveillance fee(s) in accordance with the requirements of Part I.C must be received by this Office prior to the commencement of construction activities.
VerifiedPart II, Section A, Item 1Source

Inspections

Inspection frequency, option 1
7

Permittee may choose the fixed weekly schedule instead of the biweekly-plus-rain schedule.

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 least once every 7 calendar days, or
VerifiedPart IV, Section D, Item 4Source
Inspection frequency, option 2
14

Alternative schedule: inspect at least once every 14 calendar days, before anticipated storm events, and within 24 hours after 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 least once every 14 calendar days, before anticipated storm events (or series of storm events such as intermittent showers over one or more days) and within 24 hours of the end of a storm event of 0.5 inches or greater.
VerifiedPart IV, Section D, Item 4Source
Who may inspect

Qualified Personnel - a person knowledgeable in the principles and practice of erosion and sediment controls who possesses the skills to assess conditions at the construction site that could impact storm water quality and to assess the effectiveness of any sediment and erosion control measures.

Why this applies here: This is why Basinwise cannot perform your inspections. The permit requires a trained person physically on the site.

Qualified Personnel - a person knowledgeable in the principles and practice of erosion and sediment controls who possesses the skills to assess conditions at the construction site that could impact storm water quality and to assess the effectiveness of any sediment and erosion control measures selected to control the quality of storm water discharges from the construction activity.
VerifiedPart VIII, Additional DefinitionsSource

Stabilisation

Initiate stabilisation

Stabilization measures shall be initiated immediately (interpreted as no later than the next work day) in portions of the site where earth-disturbing activities have permanently ceased, or temporarily ceased and will not resume within 14 calendar days.

Why this applies here: This applies at both land disturbance amounts.

Stabilization measures shall be initiated immediately in portions of the site where clearing, grading, excavating, or other earth disturbing activities have permanently ceased on any portion of the site or temporarily ceased and will not resume for a period exceeding 14 calendar days. For the purposes of this permit, "immediately" is interpreted to mean no later than the next work day.
VerifiedPart IV, Section D, Item 2(a)(3)(a)Source

Corrective action

Corrective action, minor fix

before the next anticipated storm event, or as soon as practicable if that is impracticable

Maintenance needs identified in inspections or by other means shall be accomplished before the next anticipated storm event or as necessary to maintain the continued effectiveness of storm water controls. If maintenance prior to the next anticipated storm event is impracticable, maintenance must be scheduled and accomplished as soon as practicable.
VerifiedPart IV, Section D, Item 3Source
Corrective action, major fix
7

Based on inspection results, the SWPPP's control and pollution-prevention measures must be revised no later than 7 calendar days following the inspection, with implementation also required within 7 calendar days.

Based on the results of the inspection, the site description identified in the plan in accordance with Part IV.D.1 of this permit and control measures and pollution prevention measures identified in the plan in accordance with Part IV.D.2 of this permit shall be revised as appropriate, but in no case later than seven calendar days following the inspection.
VerifiedPart IV, Section D, Item 4(b)Source

Buffers

Natural buffer
100

For discharges to waters designated as Outstanding Natural Resource Waters, permittees must maintain at minimum a 100-foot natural, vegetated riparian buffer zone between any disturbance and the receiving water, unless infeasible.

For discharges to waters designated as Outstanding Natural Resource Waters, permittees are required to maintain at a minimum a 100-foot natural, vegetated riparian buffer zone between any disturbance and all edges of the receiving water as means of providing adequate protection to receiving waters, unless infeasible.
VerifiedPart IV, Section D, Item 2(a)(2)(g)(ii)Source

Records you must keep

Inspection report deadline
168

The written inspection report must be completed within 7 calendar days of the inspection and retained as part of the SWPPP.

The inspection report which includes the information listed in items 1-9 above and all actions taken in accordance with Part IV.D.4.b of the permit shall be made within 7 calendar days and retained as part of the SWPPP for at least three years from the date that the site is finally stabilized.
VerifiedPart IV, Section D, Item 4(c)Source
Record retention
3

SWPPPs and all records/reports required by the permit must be retained for at least 3 years from the date the site is finally stabilized; LDEQ may request an extension.

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 SWPPPs and all records and 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.
VerifiedPart V, Section ASource

Screen a Louisiana site now

Your acreage, your receiving water, your answer. Runs in your browser, nothing is transmitted.

Screen your site

Runs in your browser

Total land disturbance over the whole project, including staging and access. This decides whether you need a permit at all.

Optional. If you phase the work, the most that will be disturbed at once. Leave blank if the whole site is open together. The stabilisation deadline turns on this figure, not the total.

A half acre lot inside a 40 acre subdivision is covered even though the lot alone is under the threshold. This is the most commonly missed trigger in the permit.

Receiving water and site conditions(optional, but they change the inspection frequency)

May allow a reduced inspection frequency during the seasonally dry period.

EPA keeps permitting authority in Indian country even inside a state that runs its own programme.

No account, no card, nothing 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 Louisiana, 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 Louisiana

What are the SWPPP requirements in Louisiana?

Louisiana issues its own construction general permit, and we have read Storm Water General Permit for Large Construction Activities (LAR100000). 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 Louisiana Department of Environmental Quality (LDEQ), LPDES program.

Who may prepare a SWPPP in Louisiana?

No preparer credential was found for Louisiana. 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 Louisiana site be inspected?

The inspection frequency is set by the Louisiana construction general permit, which we have not read. Confirm it with Louisiana Department of Environmental Quality (LDEQ), LPDES program.

Who may prepare a stormwater plan in Louisiana

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.