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3. Under DIVISION 9 — CONSTRUCTION SPECIFICATIONS, please note the following:

A. Under ITEM E — PROTECTIVE SURFACING (POURED IN-PLACE RUBBER}, add language to
address base materials. The specification shall read as follows:

ITEM ‘E’ — PROTECTIVE SURFACING (POURED-IN PLACE RUBBER)

A. SCOPE

This work shall consist of installation of a protective surface material at the location(s) shown on the
layout plan per the detail of the plan set provided or as ordered by the Engineer.

B. MATERIALS AND CONSTRUCTION

The Contractor shall supply all labor, materials, equipment and transportation necessary for the required
work. The depth of material may vary based on the fall height of the adjacent playground equipment
and shall consist of a poured-in-place rubber system.

Subgrade shall be crushed stone 6” thick and comply with the manufacturers specifications for gradation
and density. Manufacturer's specifications are included with this document.

The Contractor shall hire a materials testing contractor to test the crushed stone. The testing contractor
shall be approved by the City. Tests will be for density (Proctor Test and Nuclear Gauge Test) and
Gradation (Sieve Analysis). The Sieve Analysis and Proctor Tests shall be completed and acceptable to the
City prior to placement of crushed stone. On site density testing (Nuclear Gauge) will be required after
the crushed stone has been placed and before the poured in place surface has been installed. A minimum
of 2 nuclear gauge density readings shall be taken for every piece of playground equipment with a
rubberized surface. Total readings shall be no less than 20. Failing test results will be subject to material
replacement or other corrective actions deemed acceptable to the City.

Poured-in-place Rubber System Specifications or approved equal

PART 1 — General

1.01___ POURED IN PLACE RUBBER PLAYGROUND SURFACING

A. Poured In Place Rubber Playground Surfacing is a 2-layer, seamless system comprised of
a base layer of 100% post-consumer recycled SBR rubber & polyurethane binder and a
top layer of EPDM rubber and polyurethane binder. The porous system is field-applied in
any configuration and dimension ta achieve required fall heights.

1.02 SAFETY AND TESTING

2 ADDENDUM 2

A. ASTM D412 Standard Test Methods for Vulcanized Rubber and Thermoplastic Rubbers
and Thermoplastic Elastomers-Tension.

B. ASTM D624 Standard Test Method for Tear Strength of Conventional Vulcanized Rubber
and Thermoplastic Elastomers.

C. ASTM D2047 Standard Test Method for Static Coefficient of Friction of Polish-Coated
Floor Surfaces as Measured by the James Machine.

D. ASTM D2859 Standard Test Method for Flammability of Finished Textile Floor Covering
Materials.

E. ASTM £303 Standard Test Method for Measuring Surface Frictional Properties Using the
British Pendulum Tester.

E, ASTM F1951 Standard Specification for Determination of Accessibility of Surface Systems
Under and Around Playground Equipment.

1.03 | PERFORMANCE REQUIREMENTS

A. Flammability (ASTM D2859): Pass.

B. Tensile Strength (ASTM D412): 60 psi (413 kPa).

Cc. Tear Resistance (ASTM D624): 140%.

D: Water Permeability: 0.4 gal/yd2/second.

E Accessibility: Comply with requirements of ASTM F195].

F, Dry Static Coefficient of Friction (ASTM D204 7): 1.0.

G. Wet Static Coefficient of Friction (ASTM D2047): 0.9.

H. Dry Skid Resistance [ASTM E303): 89.

I, Wet Skid Resistance (ASTM £303): 57.

1.04 SUBMITTALS

A. General: Submit listed submittals in accordance with Conditions of the Contract and
Division 1 Submittal Procedures Section.

B. Product Data: Submit manufacturer’s product data and installation instructions.

G Verification Samples: Submit manufacturer’s standard verification samples of 9" x 9"
minimum.

D. Quality Assurance/Control Submittals: Submit the following:

3 ADDENDUM 2

1. Certificate of qualifications of the surfacing installer.
Closeout Submittals: Submit the following:

1. Warranty documents specified herein.

1.05 QUALITY ASSURANCE

A. Utilize an installer trained and approved by the manufacturer, having experience with
other projects of the scope and scale of the work described in this section.

1.06 DELIVERY & STORAGE

A. Deliver materials in manufacturer’s original, unopened, undamaged containers with
identification labels intact.

B. Store materials protected from exposure to harmful environmental conditions and at a
minimum temperature of 40 degrees F and a maximum temperature of 90 degrees F.

1.07 _ PROJECT SITE CONDITIONS

A. Install surfacing on a dry sub-surface with no prospect of rain within initial drying period,
and within 40 degrees F and 90 degrees F.

1.08 _WARRANTY

A. Playground surface shall maintain required impact attenuation characteristics and be

guaranteed against defects in workmanship and materials for a period of no less than
five years from date of completion of work. Maintenance requirements must be

maintained for duration of warranty period.

PART 2 — Products

A. Playground surface shall consist of synthetic materials meeting the requirements of this
specification. Poured In Place Rubber Playground Surfacing components shall be
installed by a certified installer of the chosen manufacturer.

2.01 _BASE LAYER

A. Primer: Polyurethane.

B. Poured In Place Base: Blend (86% rubber & 14% polyurethane) of strand and granular

100% recycled SBR (styrene butadiene rubber) and polyurethane. Depending on ASTM
F1292 requirements for critical fall height (4’, 5’, 6’, 7’, 8’, 9’ or 10’), select base layer
thickness of 1.25", 1.5" 2,0", 2.5", 3", 3.5", 4.0" or 5.0".

4 ADDENDUM 2

G. Color: Black

2.02 _ TOP LAYER

A. Primer: Polyurethane.

B. Poured In Place Top: Blend (82% rubber & 18% polyurethane) of recycled EPDM
(ethylene propylene diene monomer) and polyurethane. Nominal thickness of 0.5", with
a minimum 0.325" and a maximum 0.625".

G Colors: Terra Cotta Red, Primary Red, Orange {indoor only), Pink, Gold, Beige, Yellow,

Bright Green, Army Green, Hunter Green, Teal, Sky Blue, Royal Blue, Purple, Pearl,

Eqqshell, Brown, Light Gray, Dark Gray, Black. Custom colors and combinations available

(specify).

PART 3 — Execution

A. Comply with the instructions and recommendations of the surfacing manufacturer.

3.01 EXAMINATION

A. Verification of Site Conditions: Verify that substrate conditions are suitable for
installation of the poured in place surfacing. Do not proceed with installation until
unsuitable conditions are corrected.

B. Drainage: Proper drainage is critical to the longevity of the surfacing system. Inadequate
drainage will cause premature breakdown of the poured system in affected areas; and
void the warranty.

3.02 PREPARATION

A. Existing Substrate Preparation: Remove any loose or delaminated material that would be
deleterious to application of the new surface. Fill cracks in existing concrete with
cementitious patching compound.

B. Surface Preparation: Using a brush or short nap roller, apply primer to the substrate
perimeter and any adjacent vertical barriers (such as playground equipment) at the rate
of 300 ft2/gal.

3.03 INSTALLATION

A. Do not proceed with playground surfacing installation until all applicable site work,

including substrate preparation, fencing, playground equipment installation and other
relevant work, has been completed.

5 ADDENDUM 2

ENGINEERING DESIGN PHASE CONTRACT Page 5 of 6
For Professional Services for Treatment Works

Vi. OWNERS TERM SAND CONDITIONS

Exhibit C- Gity of Nashua Professional Services General Terms and Conditions, is hereby incorporated by reference
as if fully set forth herein.

IN WITNESS WHERECOF, the parties hereto have affixed their hand and seals at HILLSBOROUGH County, New Hampshire,
the day, month, and year first above written.

ENGINEER:
Wright-Pierce

Ley lowe Date: 3/ 30/ AORA

authffized Represent ati)

OWNER:
Oty of Nashua, New Hampshire

By: Date:

(Authorized Representative’)

APPROVED:?
DEPARTMENT OF ENVIRONMENTAL SERVICES: Water Division

By: Date:

(Authorized Representative’)

2 Signatures should be supported by appropriate document.

3 Itis agreed that as an act in furtherance of its statutory authority to approve engineering agreements for treatment works, the DIVISON's approval does not impose
any contractual obligation or liability on the Mate of New Hampshire, the Department of Environmental Services or the Division.

Rev.2020-09

B. Base Layer Installation:

1. Using screeds and hand trowels, install the base layer at a consistent density of
29 pounds, 1 ounce per cubic foot to the specified thickness.
2. Allow base layer to cure for sufficient time so that indentations are not left in the

base layer from applicator foot traffic or equipment.

3. Do not allow foot traffic or use of the base layer surface until it is sufficiently
cured.
Cc Primer Application: Using a brush or short nap roller, apply primer to the base layer

perimeter and any adjacent vertical barriers that will contact the surfacing system at the

rate of 300 ft2/qal.
D. Top Layer Installation:

a Using a hand trowel, install top layer at a consistent density of 58 pounds, 9
ounces per cubic foot to a nominal thickness of 0.5".

2. Allow top layer to cure for a minimum of 48 hours.

3 At the end of the minimum curing period, verify that the surface is sufficiently
dry and firm to allow foot traffic and use without damage to the surface.

4, Do not allow foot traffic or use of the surface until it is sufficiently cured.

3.04 PROTECTION

A. Protect the installed surface from damage resulting from subsequent construction

activity on the site.

G MEASUREMENT AND PAYMENT

Protective Surfacing will be measured by the number of square feet installed. Payment for work under
these items shall be at the contract unit price per unit and shall include full compensation for excavation,
grading, base materials, materials, labor, tools, equipment, material testing, disposal of construction
debris (existing sidewalk, concrete, asphalt, etc.), and any other incidentals necessary for the satisfactory

completion of this work as specified.

Cost to remove and replace failed subgrade material will be paid by the Contractor.

6 ADDENDUM 2

B. Under ITEM E (ALT) — PROTECTIVE SURFACING (RUBBER TILES), remove specification. This
material will not be used.

ITEM “E(ALT)’ — PROTECTIVE SURFACING (RUBBER TILES)
A. SCOPE

This work shall consist of installation of a protective surface material at the location(s) shown on the
layout plan per the detail of the plan set provided or as ordered by the Engineer.

B. MATERIALS AND CONSTRUCTION

The Contractor shall supply all labor, materials, equipment and transportation necessary for the required

work. The depth of material may vary based on the fall height of the adjacent playground equipment

and shall consist of either a poured-in-place rubber system or an interlocking rubber tile system.

Interlocking Rubber Tile System Specifications or approved equal

PART 1 GENERAL

iJ SECTION INCLUDES

A. Resilient, interlocking, playground safety surfacing tiles.

1.2 RELATED SECTIONS

A. Section 02 (32 )- : Granular aggregate
subsurface.
B. Section 02 (32 j= : Asphalt subsurface.

Cc. Section 02792 (32 18 16.13) — Poured-in-Place Playground Surfacing.

D. Section 02880 (11 68 13) — Playground Equipment.

E, Section 03300 (03 30 00) — Cast-in-Place Concrete: Concrete subsurface.

7 ADDENDUM 2

1.3

REFERENCES

ASTM C 67 — Standard Test Methods for Sampling and Testing Brick and Structural Clay
Tile.

ASTM C 501 — Standard Test Method for Relative Resistance to Wear of Unglazed
Ceramic Tile by the Taber Abraser.

ASTM D 412 — Standard Test Methods for Vulcanized Rubber and Thermoplastic
Elastomers--Tension.

ASTM D 573 — Standard Test Method for Rubber-Deterioration in an Air Oven.

ASTM D 624 — Standard Test Method for Tear Strength of Conventional Vulcanized
Rubber and Thermoplastic Elastomers.

ASTM D 2047 — Standard Test Method for Static Coefficient of Friction of Polish-Coated
Floor Surfaces as Measured by the James Machine.

ASTM D 2859 — Standard Test Method for Ignition Characteristics of Finished Textile
Floor Covering Materials.

ASTM D 3676 — Standard Specification for Rubber Cellular Cushion Used for Carpet or
Rug Underlay.

ASTM E 303 — Standard Test Method for Measuring Surface Frictional Properties Using
the British Pendulum Tester.

ASTM F 1292 — Standard Specification for Impact Attenuation of Surface Systems Under
and Around Playground Equipment.

US Consumer Product Safety Commission (CPSC) Handbook for Playground Safety.

‘ SUBMITTALS

1.4

Comply with Section 01330 (01 33 00) — Submittal Procedures.

8 ADDENDUM 2

Product Data: Submit manufacturer's product data, including installation and

Samples: Submit manufacturer's sample of 1 full tile.

Test Reports: Submit certified test reports from qualified independent testing agency

Rubber Deterioration/Air Oven: ASTM D 573.
Slip Resistance: ASTM D 2047 and E 303.

Certificate of Compliance: Submit manufacturer's certificate of compliance indicating

ge Submit list of 15 successfully completed projects.
Z Include project name and location, name of architect, and type and quantity of

playground safety surfacing tiles furnished.

1. _ Submit copy of manufacturer issued installation certification

Maintenance Instructions: Submit manufacturer's maintenance and cleaning

Warranty: Submit manufacturer's standard warranty.

B.
subsurface instructions.
ec
D.
indicating results of the following tests:
1 Impact Attenuation: ASTM F 1292.
2 Freeze Thaw: ASTM C 67.
3
4.
5. Tensile Strength: ASTM D 412.
6. Elongation at Break: ASTM D 412.
Z. Tear Strength: ASTM D 624.
8. Peak Load: ASTM D 624.
9. Density :ASTM D 3676.
10. _Taber Abrasion: ASTM C 501.
11. _ Flammability: ASTM D 2859
EB.
materials comply with specified requirements.
F, Manufacturer's Project References:
G. Installer's Project References:
Hi,
instructions.
L.
15 QUALITY ASSURANCE

g ADDENDUM 2

A. Manufacturer's Qualifications: Manufacturer shall meet a minimum of 1 of the
following 2 requirements.
1. Continuously engaged in manufacturing of playground safety surfacing tiles of
similar type to that specified, with a minimum of 10 years successful experience.
2. Furnished a minimum of 15,000,000 square feet of playground safety surfacing
tiles of similar type to that specified.

B. Installer's Qualifications:
id. Certified by manufacturer for installation of playground safety surfacing tiles.
2) Approved by manufacturer.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Delivery: Deliver materials to site in manufacturer's original, unopened containers and
packaging, with labels clearly identifying product name and manufacturer.

B. Storage:
I: Store materials in accordance with manufacturer's instructions.

2, Playground Safety Surfacing Tiles:
a: Store tiles in a dry area at a minimum temperature of 50 degrees F (10
degrees C) for a minimum of 72 hours before installation.
b. Protect tiles from direct sunlight before installation.
3. Adhesive: Store adhesive in a dry area at a minimum temperature of 50 degrees F

(10 degrees C).

C. Handling: Protect materials during handling and installation to prevent damage.

Ld ENVIRONMENTAL REQUIREMENTS

A. Tile Temperature: Ensure surface temperature of playground safety surfacing tiles is a
minimum of 50 degrees F (10 deqrees C) at time of installation.

B. Air Temperature: Ensure air temperature is a minimum of 40 degrees F (4 degrees C) for
a minimum of 24 hours before and during installation.

G Tile or Air Temperatures: Consult manufacturer's installation instructions for modified
installation procedure when tile or air temperatures are above 85 degrees F (29 degrees

C).

10 ADDENDUM 2