Elements of the Storm Water Elements of the Storm Water Management PlanManagement Plan

Storm Water Pollution Prevention Storm Water Pollution Prevention Plan Plan

(SWPPP)(SWPPP)

Small Construction Site Storm Small Construction Site Storm Water ManagementWater Management

Rodney HendrickRodney HendrickWater Quality SpecialistWater Quality Specialist

LSU Ag CenterLSU Ag Center

Plan RequirementsPlan Requirements

•• Plan should be complete prior to initiating Plan should be complete prior to initiating construction activities. construction activities.

•• Shall provide for compliance with terms of Shall provide for compliance with terms of SWPPPSWPPP

•• The plan shall be signed and maintained The plan shall be signed and maintained on site.on site.

•• A notice must be posted near the main A notice must be posted near the main entrance of site.entrance of site.

The Notice Must Contain: The Notice Must Contain:

•• The LPDES permit number (LAR 2000) and The LPDES permit number (LAR 2000) and the effective date of the permit (March 1, the effective date of the permit (March 1, 2003)2003)

•• Name and phone number of a local Name and phone number of a local contactcontact

•• Brief description of the projectBrief description of the project•• Location of the SWPPP if inactive or not on Location of the SWPPP if inactive or not on

sitesite

The SWPPP Must be Made Available The SWPPP Must be Made Available to: to:

•• State Administrative Authority (LDEQ)State Administrative Authority (LDEQ)•• Local officials with authority on sediment Local officials with authority on sediment

and erosion plansand erosion plans•• Storm water management plans, local Storm water management plans, local

government, or operator of local municipal government, or operator of local municipal separate storm sewer systems (MS4separate storm sewer systems (MS4’’s)s)

LDEQ May Require Modifications to LDEQ May Require Modifications to the Planthe Plan

•• Modifications shall be made 7 calendar Modifications shall be made 7 calendar days of receipt of noticedays of receipt of notice

Plans Must be Kept Current as Plans Must be Kept Current as Required by: Required by:

•• Change in design, operation, or Change in design, operation, or maintenance that may have significant maintenance that may have significant effect on dischargeeffect on discharge

•• Inspections indicating measures are not Inspections indicating measures are not effectiveeffective

•• To identify new contractors or To identify new contractors or subcontractors that will implement part of subcontractors that will implement part of the SWPPPthe SWPPP

Plan Contents Plan Contents

•• 1. Site Description1. Site Descriptiona.a. Description of nature of constructionDescription of nature of constructionb.b. Intended sequence of activitiesIntended sequence of activitiesc.c. Estimates of total area of site and total area to Estimates of total area of site and total area to

be disturbedbe disturbedd.d. Estimate of the run off coefficient of site pre and Estimate of the run off coefficient of site pre and

post construction and data describing soil quality post construction and data describing soil quality and run off from siteand run off from site

e.e. MapsMaps--General location mapsGeneral location maps

--site map showing slopes and drainage patterns, areas to site map showing slopes and drainage patterns, areas to be disturbed and areas not to be disturbed, location of be disturbed and areas not to be disturbed, location of structural and non structural controls in SWPPPstructural and non structural controls in SWPPP

areas for stabilizationareas for stabilizationlocations of offlocations of off--site materialsite materialbarrow or equipment storage areasbarrow or equipment storage areaslocations for storm water discharge from sitelocations for storm water discharge from site

Plan Contents (contPlan Contents (cont’’d)d)e. Mapse. Maps

Plan Contents (contPlan Contents (cont’’d)d)

f.f. Location and description of any industrial Location and description of any industrial discharge other than constructiondischarge other than construction

g.g. Name of receiving Name of receiving water(swater(s) and extent of ) and extent of wetlands or other special aquatic sites that will wetlands or other special aquatic sites that will receive discharges.receive discharges.

h.h. Copy of permit requirements (copy of permit)Copy of permit requirements (copy of permit)i.i. Information on threatened or endangered Information on threatened or endangered

species or habitatspecies or habitatj.j. Documentation of National Historic Preservation Documentation of National Historic Preservation

ActAct

Plan Contents (contPlan Contents (cont’’d)d)

•• 2. Controls2. Controls–– Description of control measures (Description of control measures (BMPBMP’’ss) to be used) to be used–– Describe control measures for each activityDescribe control measures for each activity–– Timing during construction for each measure, which Timing during construction for each measure, which

permiteepermitee is responsible for each measureis responsible for each measure–– Perimeter controls to be installed as soon as clearing Perimeter controls to be installed as soon as clearing

for measures is completed (not after full site clearing)for measures is completed (not after full site clearing)–– Perimeter controls to be maintained until final Perimeter controls to be maintained until final

stabilizations is completestabilizations is complete

Minimum Components for Control Minimum Components for Control MeasuresMeasures

•• Sediment ControlSediment Control1.1. Short and long term goals and criteriaShort and long term goals and criteria

a. Sediment controls to be designed to a. Sediment controls to be designed to retain sediment on siteretain sediment on siteb. Measures to be properly selected, b. Measures to be properly selected, installed, and maintainedinstalled, and maintainedc. Sediments escaping site must be c. Sediments escaping site must be removed from off site areasremoved from off site areas

Minimum Components for Control Minimum Components for Control Measures (contMeasures (cont’’d)d)

d.d. Sediment traps to be cleaned when half Sediment traps to be cleaned when half fullfull

e.e. Litter and chemicals shall be prevented Litter and chemicals shall be prevented from becoming a pollutantfrom becoming a pollutant

f.f. Offsite material storage for the project Offsite material storage for the project are to be included in SWPPPare to be included in SWPPP

Minimum Components for Control Minimum Components for Control Measures (contMeasures (cont’’d)d)

•• 2. Stabilization Practices2. Stabilization Practices–– The SWPPP shall include a description and The SWPPP shall include a description and

schedule of implementing interim and schedule of implementing interim and permanent stabilization practices.permanent stabilization practices.

–– Existing vegetation to be preserved where Existing vegetation to be preserved where possible. possible.

–– Disturbed areas to be stabilizedDisturbed areas to be stabilized–– Impervious surfaces should not be used for Impervious surfaces should not be used for

stabilization stabilization

Minimum Components for Control Minimum Components for Control Measures (contMeasures (cont’’d)d)

–– Records shall be kept on dates for major grading Records shall be kept on dates for major grading activities, when construction temporarily or permit activities, when construction temporarily or permit cease on any portion of site and when stabilization cease on any portion of site and when stabilization measures begin.measures begin.

–– Stabilization must begin no later than 14 days after Stabilization must begin no later than 14 days after construction has ceased on any portion of the site construction has ceased on any portion of the site (temporarily of permanent). Unless activities will (temporarily of permanent). Unless activities will resume in 21 days or less. resume in 21 days or less.

–– There are snow, frozen ground and drought There are snow, frozen ground and drought exceptionsexceptions

Minimum Components for Control Minimum Components for Control Measures (contMeasures (cont’’d)d)

•• 3. Structural practices shall be described 3. Structural practices shall be described and shown on site maps.and shown on site maps.

Storm Water ManagementStorm Water Management

•• Describe measures to be installed during Describe measures to be installed during construction to control storm water discharge construction to control storm water discharge after constructionafter construction

•• May require separate section 404 permitMay require separate section 404 permit•• Only responsible for installation and Only responsible for installation and

maintenance until final stabilization sitemaintenance until final stabilization site•• PostPost--construction storm water construction storm water BMPBMP’’ss that that

discharge pollutants may require LPDES permitdischarge pollutants may require LPDES permit

Storm Water Management (contStorm Water Management (cont’’d)d)

•• PostPost--construction storm water construction storm water management practices may include: management practices may include: storm water detention and retention storm water detention and retention structures, wet ponds, vegetated swales, structures, wet ponds, vegetated swales, infiltration areas, and sequential systems. infiltration areas, and sequential systems.

•• Practice selection shall be explained if Practice selection shall be explained if postpost--construction flows exceed preconstruction flows exceed pre--construction flowsconstruction flows

Storm Water Management (contStorm Water Management (cont’’d)d)

•• Velocity dissipation device may be Velocity dissipation device may be required to prevent erosion and maintain required to prevent erosion and maintain natural function in receiving water. natural function in receiving water.

Other ControlsOther Controls

•• 1. No solid materials shall be discharged 1. No solid materials shall be discharged unless authorized by a section 404 permit.unless authorized by a section 404 permit.

•• 2. Off2. Off--site vehicle tracking of sediment site vehicle tracking of sediment and generation of dust shall be minimized. and generation of dust shall be minimized.

•• 3. The SWPPP shall demonstrate 3. The SWPPP shall demonstrate compliance with local waste and sewer compliance with local waste and sewer system requirements. system requirements.

Other Controls (contOther Controls (cont’’d)d)

•• 4. Description of construction and waste 4. Description of construction and waste materials to be stored on site and control materials to be stored on site and control measuresmeasures

•• 5. Description of pollutant sources other than 5. Description of pollutant sources other than construction, including dedicated concrete and construction, including dedicated concrete and asphalt plants and control measureasphalt plants and control measure

•• 6. Description measures to protect listed 6. Description measures to protect listed endangered or threatened species and their endangered or threatened species and their habitat. habitat.

Approved State or Local PlanApproved State or Local Plan

•• Plans must include local or state approval Plans must include local or state approval procedures and requirements. procedures and requirements.

•• Plans must be updated to meet changes in Plans must be updated to meet changes in requirements approved by local or state requirements approved by local or state officials following written notice.officials following written notice.

MaintenanceMaintenance

•• Shall provide timely maintenance of Shall provide timely maintenance of control measures to assure proper control measures to assure proper operation. Maintenance needs identified operation. Maintenance needs identified by inspection shall be accomplished before by inspection shall be accomplished before next anticipated storm event or as soon as next anticipated storm event or as soon as possible. possible.

InspectionsInspections

•• Every 14 days, before every anticipated Every 14 days, before every anticipated storm event and within 24 hours of every storm event and within 24 hours of every 0.5 inch rain event0.5 inch rain event

NonNon--Storm Water DischargesStorm Water Discharges

•• NonNon--storm water discharges must be storm water discharges must be identifiedidentified