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Schedule of Values - Bid Items
Phase III Construction - Stage |
Four Hills Landfill
Nashua, New Hampshire

(Revised February 2019)
Item . Estimated Bid Unit Prices Extended
No. Construction Items Quantity ($/units) Prices ($)
(w/units)
1 |Mobilization/Demobilization 1 LS LS
2 {Demolition
a. Remove Litter Control Fence 950 LF LF
b. Remove Existing Culverts 1 LS LS
c. Remove and Salvage Existing Riprap 55 cy cY
d. Tree Removal 6.8 AC AC
e. Decommissioning Piezometers 161 LF LF
f. Decommissioning Monitoring Well 104 LF LF
3 |Erosion and Sediment Control
a. Filter Log 1,400 | LF LF
b. Filter Log Inlet Protection 1 EA EA
4 |Grubbing and Topsoil Removal 1 LS LS
5 |Soil Excavation and Placement 97,100 | CY CY
6 |Fill Placement 59,800 | CY CY
7 {Liner System
a. Screened Till
1. From Stockpile 2,500 | CY CY
2. Import 2,245 | CY cY
b. Secondary 60-mil thick, Textured HDPE Geomembrane 28,445 | SY SY
c. Secondary Drainage Geocomposite 28,445 | SY SY
d. Secondary Drainage Sand Layer 1,660 | CY CY
e. Geosynthetic Clay Liner 1,890 | SY SY
f, Primary 60-mil Textured HDPE Geomembrane 28,445 | SY SY
g. Primary Drainage Geocomposite 28,445 | SY SY
h. Primary Drainage Sand Layer 14,225 | CY cY
8 |Landfill Berms and Anchor Trenches
a. Perimeter Berm 1,460 | LF LF
b. Liner Connection Along Phase II Berm 605 LF LF
9 |Leachate Sumps Construction 1 LS LS
10 {Installation of 8-inch Diameter Solid and Perforated HDPE Pipe 4,830 | LF LF
11 {Sump Riser Building 1 LS LS
12 |Electrical Construction 1 LS LS
13 |Controls and Instrumentation 1 LS LS
14 |Leachate Pumping System 1 LS LS
15 | Utility Trench 505 LF LF
16 |Connection to the Phase II Leachate Collection System 1 LS LS
17 |Stormwater Basin
a. Dredging the Existing Portion of the Basin 1 LS LS
b. Remove Portion of Existing Culvert 1 LS LS
c. Low-Permeability Soil 1,070 | CY cY
d. Spillway 1 LS LS
e, Wetland Plantings 1 LS LS
f. Modifying the Existing Discharge Structure 1 LS LS
g. Level Spreader 1 LS LS
18 |Riprap-Lined Swales 205 LF LF
19 |Geomembrane-Lined Swale 435 LF LF
20 |Smartditch-Lined Downchute 210 LF LF

20190110 Schedule of Values-Rev1 xlsx Page 1 of 3 Sanborn Head & Associates, Inc.

Schedule of Values - Bid Items
Phase III Construction - Stage |
Four Hills Landfill
Nashua, New Hampshire
(Revised February 2019)

Estimated
Construction Items Quantity
(w/units)
Temporary Slope Diversion Swale 670 LF LF
Drain Manhole 1 LS LS
Culverts
a. C-1 (36-inch diameter CPP LS LS
b. C-2 (36-inch diameter CPP LS LS
c. C-3 (18-inch diameter CPP LS LS
d. C-4 (24-inch diameter CPP LS LS
Topsoil and AC AC
Gravel Road SY SY
Extend Groundwater Wells LF LF
Litter Control Fence
a. Install Litter Control Fence LF LF
b. Install New Litter Control Fence LF
Guardrail LF
As-Built Dra LS
Payment Bond LS
Performance Bond LS

Bid Price

Bid Unit Prices Extended
($/units) Prices ($)

20190110 Schedule of Values-Rev1.xlsx Page 2 of 3 Sanborn Head & Associates, Inc.

Schedule of Values - Alternate Bid Items
Phase III Construction - Stage |

Four Hills Landfill
Nashua, New Hampshire
(Revised February 2019)
Alt. Bid Construction Items Estimated Quantity}! Bid Unit Prices Extended
Item No. onstt (w/units) ($/units) Prices ($)
A7 _ {Leak Detection Survey 1 LS LS
A24__|Screening Vegetation 1 LS LS
A27__|Portable Litter Fence 4 EA EA
Bid Price

20190110 Schedule of Values-Rev1 xlsx Page 3 of 3 Sanborn Head & Associates. Inc.

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=) THE CITY OF NASHUA “The Gate City’

Financial Services
Purchasing Department

February 13, 2019

IFBOS93-022019
PHASE II] LANDFILL EXPANSION
ADDENDUM #3

Information included in this document becomes a part of the original IFB.

if you are submitting a paper bid, please sign below to indicate receipt of this additional information and include this
page with your bid submittal. If you are submitting a bid via Bid Express please be sure to acknowledge the addendum
on the website before submitting your bid.

ADDENDUM 3 is being issued to respond to submitted questions and provide further clarification.

Please see the attached document for information.

All other aspects of the original document remain the same.
Failure to acknowledge the addendum will result in the bid submittal being disqualified.

Sincerely,

Fons sef

Danielle Greenberg
City of Nashua — Purchasing Agent I!
greenbergd@nashuanh.gov

Addendum #3 received and incorporated into bid submittal for 1FB0593-022019.
Please sign and include this addendum in your bid package.

Yumam Cy

(Authorized Signature) Timothy J. Cady, Director/Program Services

January 19, 2019
(Date)

Charter Contracting Company, LLC
(Name of Firm)

1FB0593-022019 ADDENDUM 3 Page 1 of 1

SANBORN ||

To:

From:

File:
Date:
Re:

cc:

| HEAD

Building Trust. Engineering Success.

MEMORANDUM

Invited Bidders

Edward A. Galvin, P.E.
Eric S. Steinhauser, P.E., CPESC, CPSWQ

3066.09
February 11, 2019

Addendum #3

Phase III Construction
Four Hill Landfill
Nashua, New Hampshire

Jeff LaFleur, City of Nashua
Kerry Converse, City of Nashua

This addendum shall be part of the Contract Documents for the above-referenced project.

Please acknowledge receipt of this Addendum in your proposal({s).

CLARIFICATIONS

1. The selected contractor will be required to pay for any installation required by
Eversource to meet the intent of the design. For the purpose of this bid, the contractor
shall provide a suggested installation allowance for this work. This allowance will not
be held against any of the invited bidders during the proposal evaluation phase as the

actual Eversource installation price is unknown at this time.

2. Specification Section 15210 was revised to:

Clarify joint hardware requirements; and

Include a section on pneumatic testing as an alternate to hydrostatic pressure
testing. The revised specification is enclosed.

3. |The pump control panel (CP-1) is to be provided by the selected contractor, not the
City. In regard to panel control logic, notes are provided on Sheet 17 of the Drawings
and are reproduced below:

SANBORN, HBAD & ASSOCIATES, INC.

A float switch shall be in the floor sump. If the float switch is closed due to liquid in
the leachate building, the leachate pumps shall be shut down and visual and remote
alarms shall be activated.

Level sensors shall be installed in the leachate sideslope risers to measure liquid
levels relative to the base of the sump liner. The level sensors shall control the
leachate pump cycles.

www.sanbornhead.com

February 11, 2019 Page 2
| Addendum #3Addendum#3.doex 3066.09

» The electrically actuated ball valve shall be normally closed. The valve should only
open when the primary leachate pump is disabled and the secondary leachate pump
is activated.

=» The primary and secondary sump pumps shall be set to start when the liquid in the
respective sump is at a level less than or equal to the respective liner elevation at
the upper edge of the sump.

=» The leachate sump pumps shall shut off when the liquid level is between 3 and 6
inches above the intake of the pump or prior to air infiltration into the pump.

=» A visual alarm shall activate if the liquid level in the primary or secondary sump is
such that a foot or more of head exists on the liner adjacent to the sump (refer to
detail 3 on sheet 16 for location of visual alarm indicators).

= Leachate indications and totalization data shall be made available for programmable
logic controller as indicated in Section 16500 of the project specifications.

Detailed logic control design will be handled during submittal process.

EAG/ESS: eag

Enclosure: Revised Specification (Section 15210)

P:\3000s\3066.09\Source Files\Contract Documents\Addendum #3\Addendum #3.docx

SANBORN i HEAD

SECTION 15210

HIGH-DENSITY POLYETHYLENE
PIPE, FITTINGS, AND APPURTENANCES

PART 1 - GENERAL
1.1 SCOPE OF WORK

A. Supply and install high-density polyethylene (HDPE) pipe, fittings, and
appurtenance for the leachate collection and conveyance systems.

1.2 SUBMITTALS

A. CONTRACTOR shall submit to ENGINEER the following:

1. Manufacturing data listing resin type, cell classification, stock density,
melt flow, flexural modulus, tensile strength, and coloration.

2. Pipe Dimensions:
a. Average outside diameter.
b. Average inside diameter.
c. Minimum and average wall thickness.
d. Approximate weight in pounds per foot.

3. Manufacturer's instructions for fusing joints.

B. CONTRACTOR shall submit pipe welding certifications for pipe fusion machine
operators prior to beginning fusion operations.

1.3. MANUFACTURER'S QUALITY ASSURANCE

A. The pipe, fittings, and valve manufacturers shall have an established quality
assurance (QA) program responsible for inspecting incoming and outgoing
materials. At a minimum, incoming polyethylene (PE) materials shall be
inspected for density per ASTM D1505, melt flow rate per ASTM D1238, and
contamination. The supplier shall certify all incoming PE materials.

B. The pipe and fittings manufacturer shall have an established QA program
responsible for assuring the long-term performance of materials and products.
Representative samples of PE materials shall be tested against the physical
property requirements of this Specification. Each extrusion line and molding
machine shall be qualified to produce pressure rated products by taking
representative production samples and performing sustained pressure tests in
accordance with ASTM D1598.

File No. 3066.09 High-Density Polyethylene Pipe 15210 - 1 of 15 Revised February 2019

C. QAtesting for representative pipe and fitting samples shall include:

Test Standard Pipe Fittings
Ring ESCR ASTM F1248 Yes Not Applicable
Sustained pressure at ASTM D1598 Yes Yes
176°F / 725 psi hoop stress (f0>100 h) (f0>100 h)
Sustained pressure at 73°F | ASTM D1598 Yes Yes
/ 1600 psi hoop stress (f0>1,000 h) (f0>1,000 h)

D. All outgoing materials shall be inspected for diameter, wall thickness, length,
straightness, out-of-roundness, concentricity, toe-in, inside and outside surface
finish, markings, and end cut. Quality control (QC) shall perform tests of
density, melt flow rate, carbon content, and carbon dispersion. In addition,
samples of the pipe provided shall be tested for hoop tensile strength and
ductility by either quick burst per ASTM D1599 or ring tensile per ASTM
D2290. Molded fittings shall be subject to x-ray inspection for voids, and tests
for knit line strength. All fabricated fittings shall be inspected for fusion
quality and alignment.

E. The pipe and fitting manufacturer shall maintain permanent QC and QA
records.

F. If manufacturer’s test data is inadequate or unavailable, then OWNER reserves
right to reject or require additional tests to satisfy material requirements. The
cost of these tests shall be borne by CONTRACTOR.

G. Work shall comply with codes and standards of the Plastic Pipe Institute (PPI).
1.4 DELIVERY, STORAGE, AND HANDLING

A. The pipe and fitting manufacturer shall package products for shipment in a
manner suitable for safe transport by commercial carrier. When delivered, a
receiving inspection shall be performed by CONTRACTOR, and any shipping
damage reported to the pipe and fittings manufacturer. Pipe and fittings shall
be handled, installed, and tested in accordance with manufacturer’s
recommendations, and the requirements of this Section.

B. Pipe Storage
1. Store or stack pipe to prevent damage from marring, crushing or
puncture. Limit maximum stacking height to 6 feet or manufacturer’s
recommended maximum height, whichever is less.
2. Store in accordance with manufacturer’s recommendations.

File No. 3066.09 High-Density Polyethylene Pipe 15210 - 2 of 15 Revised February 2019

C. Pipe Handling

1. Protect pipe from excessive heat or harmful chemicals.
2. Handle pipe and use equipment needed to avoid gouging of the pipe

surfaces.

PART 2 - PRODUCTS

PHYSICAL PROPERTIES

A. Materials used for the manufacture of HDPE pipe and fittings shall meet the
following physical property requirements:

Property Unit Test Value
Procedure

Material Designation - PPI/ASTM PE 3408
Material Classification - ASTM D1248 ICS P34
Cell Classification - ASTM D3350 345464C
Density g/cm3 ASTM D1505 >0.940
Melt Index g/10 min ASTM D1238 <0.15
Flexural Modulus psi ASTM D790 110,000 to <160,000
Tensile Strength at yield psi ASTM D638 3,000 to <3,500
Slow Crack Resistance hours ASTM F1473 >100
(PENT)
HDB psi ASTM D2837 1,600 @ 23°C
UV Stabilizer % Carbon Black | ASTM D1603 2 to3
Elastic Modulus psi ASTM D638 110,000
Brittleness Temperature oF ASTM D746 <-180
Vicat Softening of ASTM D1525 255
Temperature
Thermal Expansion in/in/oF ASTM D696 1x10+
Hardness Shore D ASTM D2240 64

B. There shall be no evidence of splitting, cracking, or breaking when the pipe is
tested.

C. Ring Stiffness Constant (RSC) values for the pipe shall be 90 percent of the
nominal.

D. The pipe and fittings shall be homogenous throughout and free from visible
cracks, holes, foreign inclusions, or other injurious defects. The pipe shall be as
uniform as commercially practical in color, opacity, density, and other physical
properties.

File No. 3066.09 High-Density Polyethylene Pipe 15210 - 3 of 15 Revised February 2019