CC_F86_SWPPP.pdf

STORM WATER POLLUTION PREVENTION PLAN

FOR

GREAT PLAINS AREA INDIAN HEALTH SERVICE

SANITATION FACILITIES

CONSTRUCTION PROJECT

FORT THOMPSON PRIMARY LAGOON CELL

RENOVATION

CROW CREEK RESERVATION

SOUTH DAKOTA

PROJECT AB-16-F86

Division of Sanitation Facilities Construction Office of Environmental Health and Engineering

Great Plains Area Indian Health Service Federal Building, Room 309

Aberdeen, SD 57401

SITE DESCRIPTION

Project Name: Fort Thompson Primary Lagoon Cell Renovation

Project Location: Located 1.5 miles east of the community of Fort Thompson, Crow Creek Reservation, Buffalo County, South Dakota Name and Address of Tribe:

Crow Creek Sioux Tribe PO Box 50 Fort Thompson, South Dakota 57339

Name and Address of Project Engineer:

Project Officer: Noah Buikema Pierre District Indian Health Service 420 S. Garfield Pierre, SD 57501

Name and Address of Contractor:

Description of Construction Activities:

Fort Thompson Primary Lagoon Cell Renovation:

The scope of work includes furnishing all labor, equipment, and materials to renovate an existing primary wastewater lagoon cell for the community of Fort Thompson, South Dakota. The project construction is located on Tribal property. Contractor will renovate the primary lagoon cell according to the plans and specifications. The work includes but is not limited to: stripping and grubbing 10 acres of the existing lagoon cell floor and berms, excavation of 12,732 CY of the existing protective liner, 575 CY of over excavation (if needed), installation of 1,143 tons of bentonite liner, installation of 8,220 CY of protective cover, removing and reinstalling of 1,093 CY of existing lagoon cell rip rap, installation of 530 CY of new rip rap, replacing the existing piping, installing 2,800 LF of 25-ft wide geotextile, replacing the six (6) existing ballast weights, removal and installation of an inlet splash pad and outlet pad, and any other appurtenances associated with the renovation of the primary wastewater lagoon cell located for the Fort Thompson community on the Crow Creek Indian Reservation.

The soil disturbing activities will include: Stripping and stockpiling topsoil, compaction, and erosion control/seeding to native grass species.

Runoff Coefficient: Final runoff coefficient will be c = 0.30

Site Area: Total combined site area is approximately 13 acres. 10 acres within the lagoon plus 3 acres outside of the lagoon to be used as a borrow area and waste area.

Sequence of Major Construction Activities.

Fort Thompson Primary Lagoon Cell Renovation:

1. Strip and stockpile top 6” of soil within the primary lagoon cell.

2. Till in bentonite liner for the lagoon floor and berms.

3. Install geotextile liner on lagoon berms

4. Install 9” rip rap over geotextile liner

5. Seed to native grass all disturbed areas outside of lagoon and install erosion control measures for all slopes greater than 6:1.

Name of Receiving Water:

Missouri River

CONTROLS

Stabilization Practices

Temporary Stabilization: A silt fence will be installed along the contours along the eastern edge of the construction site and around stockpiled areas for perimeter sediment control. Proposed construction activities are assumed to be continuous, with little or no down time during the construction season. The construction of all storm water diversionary structures will coincide with the construction of the related structures. All excavated trenches and pits will be backfilled immediately after the installation of the proposed underground structure. All areas will be continuously monitored for erosion and sedimentation.

Permanent Stabilization: Disturbed portions of the proposed construction project where construction activities permanently cease shall be stabilized with permanent native grass. The seed shall be equal to what is specified, with all slopes greater than 6:1 to have erosion control measures implemented. Permanent seeding shall be completed during the time frames of April 1st -June 1st, August 10th - September 1st, and late fall seeding (if approved by Project Engineer). If seeding is not completed before winter, the Contractor will be responsible for monitoring the runoff activities in the spring. The Contractor will be responsible for all erosion control measures required to limit excessive erosion and sedimentation on the job site. All erosion control methods used by the Contractor will have to be approved by the Project Engineer.

Structural Practices

It is not anticipated to have structural diversions; however where a diversion is needed, prior to construction, a trapezoidal drainage ditch will be constructed to divert runoff through the project area. The drainage ditches will have a 10’ wide bottom with a side slope of 3:1. The bottom of the proposed drainage ditch is designed to have a slope of approximately 1.6%. The propose ditches will be seeded and mulched upon completion. Erosion control methods such as the use of square bales, straw fiber rolls (wattles), or silt fencing intermittently placed every 500 feet perpendicular to the drainage ditch.

Storm Water Management

At the project site location, all the disturbed areas will be seeded, with the slopes greater than 6:1 mulched and punched. Storm water management of the completed project will be handled by the existing constructed wetland and drainage area on the located at the project site. Storm water will be diverted by a trapezoidal drainage ditch. Upon completion of this project, these structures will be maintained by the local tribal utility organization. The utility organization will ensure that the structures will continue to operate as designed.

OTHER CONTROLS

WASTE DISPOSAL

Waste Materials:

At the construction site, waste materials shall be collected and stored in a securely covered container approved by the Project Engineer. The container shall be emptied as often as necessary. All waste from the containers shall be hauled to a Federally approved landfill. No construction waste material or existing onsite waste material shall be buried on site. The contractor shall see that all personnel are instructed regarding the correct procedure for waste disposal. The contractor’s site superintendent will be responsible for seeing that these procedures are followed.

Hazardous Waste:

All hazardous waste materials will be disposed of in the manner specified by the manufacturer, and following all federal and Tribal regulations. The contractor will be responsible for instructing all personnel on these practices. The contractor’s site superintendent will be responsible for seeing that these procedures are followed.

Sanitary Waste:

The Contractor will have an option to provide portable sanitation units for his personnel on the job site. If provided, the Contractor will have to ensure the units are emptied on an as needed basis by a licensed sanitary waste management contractor.

OFFSITE VEHICLE TRACKING

The contractor shall insure that no excess mud, dirt, or rocks are tracked from the jobsite onto any street, highway, or county road.

HISTORIC PROPERTY PROTECTION

The Indian Health Service consulted with the Crow Creek Tribal Historical Preservation Officer through a letter sent on June 30, 2016; no letter was received back from the Crow Creek Tribal Historic Preservation Officer. Concurrence was assumed stating “no historic properties present in the APE” determination for the proposed work. In addition, a Class III report has been completed by an archaeologist (Brian L. Molyneaux) on January 25, 2012 and is on file with the Crow Creek THPO and Indian Health Service, OEH&E, Pierre District Office.

ENDANGERED SPECIES

The Indian Health Service completed a NEPA checklist for the proposed project on May 24, 2016. A scoping letter was sent to the US Fish & Wildlife on June 30, 2016. A response letter was issued by the US Fish & Wildlife to the Indian Health Service on June 30, 2016 and a “No Objection” determination to the proposed project was indicated.

TIMING OF CONTROLS/MEASURES

As indicated in the sequence of major activities, erosion control measures will be in place immediately once the stripping of the site has been completed. The construction activities will be continuous, with no projected downtime. Once construction activity ceases permanently, the construction area will be stabilized with seed, and all slopes greater than 6:1 will have erosion control measures. In addition, the interior slope of the lagoons, the low level crossing, and the wetland discharge will be rip-rapped in a timely manner.

CERTIFICATION OF COMPLIANCE WITH TRIBAL OR FEDERAL REGULATIONS

Bureau of Indian Affairs: The Indian Health Service has obtained right-of-way across all Tribal lands for the proposed project.

MAINTENANCE/INSPECTION PROCEDURES

Erosion and Sediment Control Inspection and Maintenance Practices

These are the inspection and maintenance practices that will be used to maintain erosion and sediment controls.

All control measures will be inspected at least once each week and following any storm event of 0.5 inches or greater.

All piping will be backfilled immediately after installation.

Lagoon embankments will be inspected on a daily basis, and any breaches promptly repaired.

Existing drainage areas will be inspected on a daily basis for any excessive siltation or erosion. If siltation or erosion is observed, the contractor will work with the Project Engineer on a solution to the problem. The contractor will be compensated for any construction deemed outside the contract scope of work.

Built up sediment will be removed from silt fence when it has reached one-third the height of the fence.

Silt fence shall be routinely inspected for depth of sediment, tears, to see if fabric is securely attached to the fence posts, and to see that the fence posts are firmly in the ground.

Proposed trapezoidal drainage ditches will be inspected on a daily basis for any excessive siltation or erosion.

The contractor must have any erosion control methods approved by the Project Engineer, prior to implementing them.

All seeding will be inspected for bare spots, washouts, and healthy growth.

The Project Engineer or his representative shall complete an inspection report. The reports will be completed on a weekly basis, and after every rainfall greater than 0.5 inches.

All inspections shall be conducted by the contractor’s onsite superintendent, with the Project Engineer or his representative present.

Non-Storm Water Discharge

It is expected that the following non-storm water discharges will occur from the site during the construction period:

Water from water tanker during the compaction and grading of the lagoon. The water will be sprayed over a large area and mixed with the soil material through compaction and grading efforts. No erosion will occur from the discharge of water for soil compaction.

Trench dewatering (not expected)

INVENTORY FOR POLLUTION PREVENTION PLAN

The materials or substances listed below are expected to be present onsite during construction:

Concrete Cleaning Solvents Antifreeze Detergents Lumber Coal Tar Epoxy Metal Valves & Fittings Rebar Polystyrene Foam Glue & Adhesives Metal, PVC, & HDPE Pipe Petroleum Based Products Soil Fertilizer (18-46-0)

SPILL PREVENTION

Material Management Practices

The following are the material management practices that will be used to reduce the risk of spills or other accidental exposure of materials and substances to storm water runoff.

GOOD HOUSEKEEPING

The following good housekeeping practices will be followed onsite during the construction project.

An effort will be made to store only enough product required to do the job.

All materials stored on site will be stored in a neat, orderly manner in their appropriate containers and, if possible, under a roof or other enclosure, unless they are normally stored outside (e.g., fencing, pipe, etc.).

Products will be kept in their original containers with the original manufacturer’s label.

Substances will not be mixed with one another unless recommended by the manufacturer.

Whenever possible, all of a product will be used before disposing of the container.

Manufacturer’s recommendations for proper use and disposal will be followed.

The contractor’s site superintendent will inspect daily to ensure proper use and disposal of materials onsite.

HAZARDOUS PRODUCTS

These practices are used to reduce the risks associated with hazardous materials.

Products will be kept in original containers unless they are not resealable.

Original labels and material safety data will be retained; they contain important product information.

If surplus product must be disposed of, manufacturer’s, Tribal, and Federal recommended methods for proper disposal will be followed.

Product Specific Practices

The following product specific practices will be followed onsite:

PETROLEUM PRODUCTS

All onsite vehicles will be monitored for leaks and receive regular preventative maintenance to reduce the chance of leakage.

Petroleum products will be stored in tightly sealed containers, which are clearly labeled. Any asphalt substances used onsite will be applied to the manufacturer’s recommendations.

FERTILIZERS

Fertilizers will be used applied in accordance to the specifications, and as recommended by the manufacturer. Once applied, fertilizer will be worked in to the soil to limit exposure to storm water. Storage of fertilizer shall be in a covered area. The contents of any used bags of fertilizer will be transferred to a sealable plastic bin to avoid spills.

CONCRETE TRUCKS

Concrete trucks will not be allowed to wash out or discharge surplus concrete or drum wash water on the site.

CLEANING SOLVENTS

Excess cleaning solvents and detergents will not be discharged to the local drainage ditches or creeks, but will be properly disposed of according to manufacturer’s instructions or federal and tribal regulations.

ANTIFREEZE

All onsite vehicles will be monitored for leaks and receive regular preventative maintenance to reduce the chance of leakage.

Antifreeze will be stored in tightly sealed containers, which are clearly labeled.

GLUES AND ADHESIVES

All containers will be tightly sealed and stored when not required for use. Any glue or adhesive substances used onsite will be applied to the manufacturer’s recommendations.

Spill Control Practices

In addition to the good housekeeping and material management practices discussed in the previous sections of this plan, the following practices will be followed for spill prevention and cleanup.

Contractor will post the manufacturer’s recommended methods for spill cleanup, and site personnel will be made aware of the procedures and the location of the information and cleanup supplies.

Contractor shall store onsite, materials and equipment necessary for spill cleanup. The materials and equipment shall be kept in a storage area, and shall include but not be limited to brooms, dustpans, mops, rags, gloves, goggles, kitty litter, sand sawdust, and plastic and metal trash containers specifically for this purpose.

All spills will be cleaned up immediately after discovery.

The spill area will be kept well ventilated and personnel will wear appropriate protective clothing to prevent injury from contact with a hazardous substance.

Spills of toxic or hazardous material will be reported to the appropriate State, Federal, or Tribal agency, regardless of the size.

The spill prevention plan will be adjusted to include measures to prevent this type of spill from reoccurring and how to clean up the spill if there is another one. A description of the spill, what caused it, and the cleanup measures will also be included.

The contractor’s onsite superintendent will be the spill prevention and cleanup coordinator. He will designate at least three other site personnel who will receive spill prevention and cleanup training. These individuals will each become responsible for a particular phase of prevention and cleanup. The names of the responsible personnel will be posted in the material storage area and in the office trailer onsite.

POLLUTION PREVENTION PLAN CERTIFICATION

OWNER CERTIFICATION

I certify that I understand the terms and conditions of the general National Pollutant Discharge Elimination System (NPDES) permit that authorizes the storm water discharges associated with industrial activity from the construction site identified as part of this certification.

Signed:_______________________________________ Date:_____________________ Jason Petersen, Engineer Consultant, COR Indian Health Service

CONTRACTOR CERTIFICATION

I certify that I understand the terms and conditions of the general National Pollutant Discharge Elimination System (NPDES) permit that authorizes the storm water discharges associated with industrial activity from the construction site identified as part of this certification.

Signed:_______________________________________ Date:_____________________