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BID ITEM DEFINITIONS

Concrete Block Wall
Four Hills Landfill
Nashua, New Hampshire

The following describes the Bid Items and the mechanism for payment to CONTRACTOR for each
completed Bid Item. All incidental costs such as overhead, profit, and insurance shall be factored into
the Bid Item unit prices. All measurements are based on plan view areas and lengths without
consideration of slope. Bidders should factor slope adjustments into their Bid Item unit prices.

Bid Item No. 1 Mobilization /Demobilization

This item requires that CONTRACTOR furnish and/or deliver to the job site all labor, materials,
resources, and temporary support facilities, including but not limited to portable sanitary facilities,
and equipment necessary to perform the required Work. In addition, CONTRACTOR shall prepare
all required written plans and schedules, including but not limited to: Site-Specific Health and Safety
Plan, initial and progress construction schedules, and subcontractor work plans. One half of this
item will be paid as part of the initial progress payment after temporary support facilities are set up
and construction equipment and materials have been delivered to the Site. The remainder will be
paid for demobilization after the Work has been deemed substantially complete, CONTRACTOR has
provided Record Documents in accordance with the requirements of the Specifications, and
CONTRACTOR has demobilized from the Site, which shall include removal of all materials, resources,
equipment, temporary support facilities, and all remaining construction debris at the completion of
the work.

Bid Item No. 2 Earthwork

This Bid Item includes all labor, materials, equipment tools, and apparatus as necessary, to place
Screened Till foundation for the east concrete block wall as shown on the Drawings. This item
includes compaction of the material as specified on the Drawings. This item will be paid on a unit
basis per linear foot of Screened Till placement completed. OWNER shall furnish till (unscreened)
from on-site stockpile.

Bid {tem No. 3 Furnish and Install Concrete Blocks

This Bid Item includes all labor, materials, equipment, tools, and apparatus as necessary, to furnish
and install concrete blocks as shown on the Drawings. CONTRACTOR shall be responsible to
provide equipment and labor necessary to transport and unload concrete blocks at the site.
CONTRACTOR shall be responsible for placing and compacting Common Borrow Fill along the west
side of the west concrete block wall and on the east side of the east concrete block wall as shown on
the Drawings. OWNER will supply the Common Borrow Fill material. This item will be paid on
a unit basis per linear foot of wall constructed as specified on the Drawings.

Bid Item No. 4 Supply and Install Wall Lining
This item includes all labor, materials, equipment, tools, and apparatus as necessary, to furnish and
install 60-mil! HDPE Smooth Geomembrane and 10 ounce per square yard nonwoven geotextile

as specified on the Drawings. This item will be paid on a unit basis per linear foot of wall
constructed as specified on the Drawings.

Page 2 af 4

Bid Item No. 5 Landfill Gas Conveyance Pipe

This item requires that CONTRACTOR provide all labor and equipment to place landfill gas
conveyance pipe against the landfill side of the east block wall at the base of the wall. Labor shall
include installing 4-inch diameter perforated high density polyethylene (HDPE) SDR-17 pipe and 1 %-
inch diameter Crushed Stone as defined in the Drawings. OWNER shall furnish the pipe and install any
and all fittings (risers, well heads connections, wyes, tees and elbows) required to complete the work.
This item will be paid on a unit basis per linear foot of pipe installed

Bid Item No. 6 Survey

This item requires that CONTRACTOR provide ali labor and equipment required to perform
construction layout and as-built documentation as required by the Drawings and as requested by
ENGINEER and/or OWNER. Construction layout shall be completed prior to the start of screened till
placement and shall include the concrete block wall alignment and all other work items as defined in
the Drawings. CONTRACTOR shall document the constructed alignment of the concrete block wall
and LFG conveyance pipe. As-built survey locations shall be performed as features are constructed
for payment and record information and shall include all completed items as defined in the Drawings.
This item will be paid on a lump sum basis prorated over the scheduled duration of the work.

Page 3 of 4

City of Nashua, NH

Liability Insurance Requirements
July 1, 2015

The VENDOR must maintain the following lines of coverage and policy limits for the duration of the
contract. Any subcontractors used by the VENDOR are subject to the same coverage and limits and is a
subcontractor to the VENDOR and not the OWNER. It is the responsibility of the VENDOR to update
Certificates of Insurance during the term of the contract.

> General Liability:
$1,000,000 per Occurrence
$2,000,000 Aggregate
(City of Nashua Additional Insured)

> Motor Vehicle Liability:
$1,000,000 Combined Single Limit *coverage must include all owned, non-owned

a red vehicles.
(City of Nashua Additional Insured)

>Workers’ Compensation Coverage according to Statute of the State of New Hampshire:
$100,000 / $500,000 / $100,000

(Sole Proprietors not subject to Workers’ Compensation requirements)

VENDOR and subcontractors at every tier under the VENDOR will fully comply with NH RSA 281-A,
“Workers’ Compensation’.

Page 4 of 4

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Exhibit A: Scope of Work — Revised 2/14/2017

I. Prepare Preliminary Design Report for Primary Tank Upgrade

A.

Preliminary workshap. ENGINEER shall attend a preliminary workshop with
OWNER to review the work plan for the upgrade project, and solicit input on a
wide range of issues including chain and flight material, shaft layout, scum
handling and disposal options, and ancillary improvements. Brainstorm on
options, and identify the preferred alternatives for detailed evaluation.

Develop base plans and collect site data. ENGINEER shall develop base plans
for construction documents using existing record drawing information
supplemented by detailed field measurements. This will primarily focus on the
depth and dimensions of the scum well and scum piping. Assume 1 day of field
measurements by ENGINEER with 2-person team.

Prepare and Issue Technical Memorandum (TM)

1. Evaluate design requirements for upgraded chain and flight mechanism
including material options: conventional plastic molded, fiberglass loop
and stainless steel chain. Evaluate options for relocation of drive and
return shafts. Arrange and attend 1 day of field trips with OWNER staff to
other New England WWTFs to see rectangular mechanisms and inspect
chain material options. ENGINEER shall develop draft TM for OWNER
input.

2. Evaluate requirements for new sludge withdrawal system using automated
valves for basins 3, 4, 5 including piping modifications in the Primary
Gallery, sludge well modifications and control system for automated
valves. ENGINEER shall develop draft TM for OWNER input.

3. Evaluate options for new access hatches over sludge wells. ENGINEER
shall develop draft TM for OWNER input.
4, Assess condition of primary pumps with manufacturer’s representative

and determine rehabilitation and/or replacement requirements.
ENGINEER shall develop draft TM for OWNER input.

5. Inspect the odor control fans with manufacturer’s representative and
determine rehabilitation requirements. Inspect grease/mist eliminator, fan
enclosure and carbon vessel with manufacturer’s representative and access
upgrade needs. ENGINEER shall develop draft TM for OWNER input.
Access need for and requirements for winter operation and possible
enclosure of odor control system.