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Replace Septic Tank at Ocracoke Maintenance Page 1

CAPE HATTERAS NATIONAL SEASHORE

North Carolina

STATEMENT OF WORK:

Replace Septic Tank at Ocracoke Maintenance

NATIONAL PARK SERVICE

Region 2

Replace Septic Tank at Ocracoke Maintenance Page 2

CAPE HATTERAS NATIONAL SEASHORE

Outer Banks Group

Statement of Work

Replace Septic Tank at Ocracoke Maintenance

1.0 INTRODUCTION

The National Park Service (NPS) Cape Hatteras National Seashore (CAHA) has a requirement to replace the septic tank with a new septic tank and lift station located behind the Ocracoke

Maintenance building.

2.0 CONSTRUCTION SITE LOCATION

The address for the project site is 100 NPS Road Ocracoke, NC 29760.

3.0 BACKGROUND AND EXISTING CONDITIONS

The NPS maintenance building on Ocracoke includes two restrooms with a toilet and sink in each restroom. The wastewater from the restrooms flow into a septic tank located behind the maintenance building. A laundry building used by park service staff living in housing units also flows into the septic tank. The septic tank empties into a drainfield located approximately 40 ft behind the maintenance building. The existing septic tank is approximately 750 gal and is located approx. 10 ft from the maintenance building.

The site was examined according to North Carolina Administrative Code Title 15A Chapter 18

Environmental Health Subchapter 18A Sanitation Section .1900 Sewage Treatment and Disposal

Systems. Specifically, the topography, landscape, soil characteristics, soil wetness condition and water table depth, soil depth and restrictive horizons, daily flow rate, and setbacks for the location of tank and drainfield.

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Figure 1: Existing drainfield and septic tank located behind 1441 Pear Pad Rd.

4.0 SCOPE OF WORK

Replace the septic tank with a new tank and lift station connect to another lift station.

1. Obtain an updated septic permit from Hyde County Public Health Department before commencing the work on site. Provide a copy of the completed permit to the CO/COR.

2. Demo existing 750 gal concrete septic tank and distribution tank located immediately behind the maintenance building.

3. Provide new 1,000 gallon concrete septic tank. Locate new tank in approximately the same location as the existing.

4. Connect existing sanitary sewage drain pipe from Ocracoke maintenance and the

Laundry building to the new septic tank.

a. Provide properly sealed joints and connections from the existing drain pipes to new sections of pipe which seal to the new septic tank. Use schedule 40 PVC approved equal material.

5. Provide new exterior enclosed package unit above ground sewage lift station suitable for a marine environment. Connect new lift station to the electric panel within Ocracoke

Maintenance Building. Lift station shall have the following specifications:

a. NEMA rated Pump Control System

b. Float Operated

c. Self priming pumps

d. Single phase electrical components

e. Alarm notification system including visual light

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f. Enclosure with following:

i. Fiber glass Reinforced Plastic corrosion resistant, mildew, mold, and UV ray resistant.

ii. Removable or hinged door panels on two sides allowing access to system components. Doors must be securable with padlock and vandal resistant.

iii. Fully removeable

iv. Pad mounted

g. Alternating Dual pumps and motors

h. Acceptable Manufacturers include:

i. Gorman Rupp 6x6 T2

ii. Wastecorp Pumps 6x6 lift station with enclosure

iii. Smith and Loveless Everlast Series

iv. Or Equivalent Lift station

6. Connect new lift station to the existing lift station located behind the Ocracoke Office

Trailer.

a. Trench in new forced main septic line 24 inches minimum below grade, approx.

125 ft.

b. Provide properly sealed joints and connections from the existing drain pipes to new sections of pipe which seal to the new septic tank.

c. New force main may be jack and bored or trenched. Trenching beneath pavement shall be backfilled with 4 inches of compacted aggregate base course and 3 inches of asphalt patch (cold patch or hot mix) – Aquaphalt 6.0 permanent asphalt repair or equal permanent asphalt repair mix.

d. Locate existing underground utilizes prior to trenching.

Figure 2: Proposed New 1,000 gal septic tank, above ground lift station, and force main.

NOTES:

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1. The Contractor shall obtain an updated Septic Permit for the project before commencing the work.

2. The Contractor must track demolition debris which are removed/recycled and provide NPS with receipts showing the weight and volume and type of material removed/recycled as part of this project.

3. No construction debris will be allowed to be left on premises. All public areas will remain clean and passible during normal business hours. During business hours, the contractor will ensure that no music is playing in the work areas and no foul language will be tolerated during or after business hours. Work on this project will be accomplished within the hours of 7:00 AM to 5:00 PM Monday thru Friday.

5.0 GOVERNMENT FURNISHED PROPERTY

1. No Government property, materials, or equipment will be provided. Water and electricity in the restrooms is available for Contractor use during this project.

Contractor is responsible for lockout/tagout

6.0 SUBMITTALS

1. Work schedule: delineating the various stages of work by phase (milestones) prior to the preconstruction conference.

2. Safety Plan/Accident Prevention Plan prior to the preconstruction conference.

3. Product Data. The Contractor shall submit written documentation or color/product samples for materials identified in the Scope of Work for selection by the CO/COR.

3.1 Copy of approved septic permit from Hyde County Public Health

3.2 Septic Tank product data

3.3 Lift Station Product Data including Hard Copy Operations and

Maintenance Manuals

3.4 Manhole/Riser data