Pier 2 Water Scope and Bid Schedule.pdf

Pier 2 Potable Water System Repairs

BID SCHEDULE: Refer to specification section 00 22 13.00 20

SCOPE OF WORK: (copied from Spec section 01 11 00 SUMMARY OF WORK, subpart 1.3.1 Project Description)

1.3.1.1 Water System Repair Introduction

The Pier 2 water system is a piped water main system that is maintained and operated by NSN Public Works Department (PWD) and supplies potable water that serves both fire and domestic needs for buildings located on the pier and ships berthed at the pier. Pier 2 is classified as a Department of Defense (DoD) Pier and its design, operation, and maintenance is regulated by UFC, NFPA, and other DOD and safety requirements.

1.3.1.2 Work Scope - Phase 1

Phase I Water System Repairs consists of the Base Price (CLIN 0001) and Option Item 1(CLIN 0002). The Phase I water system repair work involves the demolition, removal from NSN and the installation of replacement pipe and appurtenances. The Base Price requires removal and replacement work activity on approximately 425 linear feet to Demarcation Point A along the north above/underside length of the 1,500 foot long pier, as shown on the drawings. Option Item 1 requires removal and replacement work activity on approximately 465 linear feet Demarcation Point A to Demarcation Point B along the north above/underside of pier, as shown on the drawingsPhase 1 Work is part of the overall general pipe arrangement; a 3,220 linear foot looped type main system hung below the pier deck that feeds individual service lines along the full length of pier. The main system is metered on the mainland in a concrete vault directly adjacent to the east end of the pier bulkhead and is fed from a single 12-inch main connected to a 12-inch Base water main located in Burma Road/Defense Highway.

1.3.1.3 Existing Conditions

Portions of the pier water main distribution system are constructed of uncoated welded steel pipe with expansion loops, and portions were constructed of uncoated ductile iron pipe with expansion fittings. The two dissimilar pipes are connected on the north underside of the pier. Service lines off the water main provide domestic water supply and fire water supply to Building 68 located in the central portion of the pier and fire water supply to ship service outlets and fire hydrants located around the perimeter of the pier.

The existing pier water distribution pipe system is insulated with 1-1/2-inch thick poly foam insulation with a protective polyethylene or PVC jacket and a self-regulating electric wire heat trace system served via under pier conduits from the pier’s power Load Center No. 2. The heat trace control panel is located above the water line within the Load Center area of Building 68.

The pier deck has a limited number of manhole openings through the deck in which to access the water system and primary access to the water main is by small boat from below the pier.

1.3.1.4 Demolition Scope (Phase 1 - Base Price)

The demolition scope for the Pier 2 - Base Price will be partial removal of the water system beginning with the water meter and 12” main located at the steam/water vault on the east side of the Pier 2 bulkhead. The demolition work continues through the 12” x 8” tee connection and the north section of the 8” loop around the pier to a point (Demarcation Point A approximately 150 feet west of Ship Hood 1). The following list is not a comprehensive summary of all demolition responsibilities of the contractor

a. All water pipe insulation and heat tracing is to be removed.

b. The pipe support system including hangers, rollers, and structural components is to be removed.

c. The primary water meter and steam equipment in vault, all valves, fire hydrants, backflow prevention devices and ship service connections will be removed.

d. Manhole access stations not being reused on the top side of the pier will be removed and repaired.

e. The abandoned steam distribution system is to be removed for a distance of 10 feet on either side of the proposed water line at all crossings and removed entirely at ship service hoods on the topside of the pier.

f. Steam pipe insulation contains asbestos and outer jacket has lead paint.

1.3.1.5 Demolition Scope (Phase 1 - Option Item 1)

The demolition scope for the Pier 2 - Option Item 1 will be partial removal of the water system beginning at Demarcation Point A approximately 150 feet west of Ship Hood 1 and continuing approximately 465 feet west beyond the westerly most connection to Building 68 to Demarcation Point B, as shown on drawings.

The following list is not a comprehensive summary of all demolition responsibilities of the contractor.

a. All water pipe insulation and heat tracing is to be removed.

b. The pipe support system including hangers, rollers, and structural components is to be removed.

c. All valves, fire hydrants, backflow prevention devices and ship service connections will be removed.

d. Service connections to pier buildings will also be removed.

e. Manhole access stations not being reused on the top side of the pier will be removed and repaired.

f. The abandoned steam distribution system is to be removed for a distance of 10 feet on either side of the proposed water line at all crossings and removed entirety at ship service hoods on the topside of the pier.

g. Steam pipe insulation contains asbestos and outer jacket has lead paint.

1.3.1.6 System Repairs

Access to work areas is to be via existing pier penetrations and small boat (North side pier approach only). Access to under pier work areas will be via water surface or existing pier surface penetrations. Existing penetrations are nominal 24 inch diameter portals. Additional Contractor generated penetrations and existing penetrations utilized are to be restored to previous Pier loading and finish standards. Holes in, or damage to the concrete structure resulting from removal of the utility hanging systems will be repaired. A temporary water system is to be installed along the north side of the pier to provide water to the user points until such time that the new system is operable, tested and accepted. The proposed work is intended to occur during the warm months of the year to eliminate concerns of freezing and to provide favorable weather for removal and replacement of the under-pier system. Refer to specification Section 01 14 00 - WORK RESTRICTIONS for additional NSN site access, worker restraints and Contract delivery dates.

1.3.1.7 New Water Distribution System

Work descriptions and implied tasks below are generalized. Refer to all Contract documentation; plans and specifications and specific geographical and Contract time constraints.

1.3.1.8 Phase I - Base Price Water Distribution Installation

The Phase I - Base Price water distribution system will system begin with new water 8 inch water meter located at the existing steam/water vault on the east side of the Pier 2 bulkhead. The water installation will include an 8 inch main from the meter continuing through an 8 inch x 8 inch tee connection and continuing with an 8 inch line along the north section of the pier to Demarcation Point A, approximately 150 feet west of Ship Hood

1. The new water piping will be cement lined Class 52 ductile iron pipe with push on joints supported below the pier on rollers. The ductile iron pipe will be coated with zinc corrosion protection. Bolt on wedge type restraint harnesses will be installed at pipe joints to provide resistance to temperature and water pressure changes. The ship service line at Ship Hood 1 will be 4 inch with 2 - 2 1/2 inch hose ship hose connection.

straight lengths of pipe will be installed with Stainless Steel jacketed insulation and heat tracing. Fittings, joints and valves will be installed with pre-molded PVC jacketed insulation and heat tracing. A new fire hydrant will be installed at location shown on the Drawings. Backflow prevention devices will be provided at the 8" main east of the Tee and at Ship Hood 1, housed in “Hot Boxes” above the pier to prevent freezing and provide easy access.

a. All pipe hangers, rollers and supports will be constructed out of stainless steel.

b. All fasteners, anchors and bolts will be constructed out of stainless steel.

c. Existing angle iron brackets and plates that attach the hangers to the bottom of the pier deck will be removed and replaced with stainless steel. Pipe hangers will be located near each pipe joint with a minimum of two hangers per pipe section. Fixed stainless steel bracing will be required at 90-degree bends, tees and expansion joints.

d. Expansion joints to be forced balance installed at locations shown on drawings. Ball type ductile iron expansion joints will be used at the eastern end of the pier and at pier expansion joints. Linear forced balance ductile iron expansion joints will be installed between fixed points in the main pipeline.

e. New isolation valves will be installed under the pier at various locations along the main and at services to provide control of the system. The valves will be accessible from the top deck of the pier through new manhole access points.

1.3.1.9 Phase I - Option Item 1 Water Distribution Installation

The Phase I - Option Item 1 water distribution system begins at Demarcation Point A approximately 150 feet of west of Ship Hood 1 and continues approximately 465 feet to Demarcation Point B. The water installation will include an 8 inch main from Demarcation Point A and continuing line along the north section of the pier to Demarcation Point B located beyond the westerly most connection to Building 68. The new water piping will be cement lined Class 52 ductile iron pipe with push on joints supported below the pier on rollers. The ductile iron pipe will be coated with zinc corrosion protection. Bolt on wedge type restraint harnesses will be installed at pipe joints to provide resistance to temperature and water pressure changes. The ship service line at Ship Hood 2 will be 4 inch with 2 - 2 1/2 inch hose ship hose connection. Straight lengths of pipe will be installed with Stainless Steel jacketed insulation and heat tracing. Fittings, joints and valves will be installed with pre-molded PVC jacketed insulation and heat tracing. Two new fire hydrant will be installed at locations shown on the Drawings. Backflow prevention devices will be provided at Ship Hoods 2 & 3, housed in “Hot Boxes” above the pier to prevent freezing and provide easy access. Service connections will be provided to Building 68 as shown on Drawings. There will be two 6 inch fire protection connections and one 4” domestic water service to Building 68 in the locations of the existing pipes and will connect to the existing building services at the flange on the top side of the building slab.

a. All pipe hangers, rollers and supports will be constructed out of stainless steel.

b. All fasteners, anchors and bolts will be constructed out of stainless steel.

c. Existing angle iron brackets and plates that attach the hangers to the bottom of the pier deck will be removed and replaced with stainless steel. Pipe hangers will be located near each pipe joint with a minimum of two hangers per pipe section. Fixed stainless steel bracing will be required at 90-degree bends, tees and expansion joints.

d. Expansion joints to be forced balance installed at locations shown on drawings. Linear forced balance ductile iron expansion joints will be installed between fixed points in the main pipeline.

e. New isolation valves will be installed under the pier at various locations along the main and at services to provide control of the system. The valves will be accessible from the top deck of the pier through new manhole access points.

END.