A04_SOW_GRCA_SeedStorageConcretePadAndElectrica_V2.pdf

Scope / Statement of Work (SOW)

Grand Canyon National Park (GRCA)

Grand Canyon, AZ

Contract: ________________

Table of Contents

1.0 Project Description / Summary

2.0 Objectives

3.0 Background

4.0 Specific Work / Tasks

5.0 Optional Work / Tasks

6.0 Government Furnished Equipment / Materials / Other

7.0 Special Conditions / Requirements

8.0 Place of Performance

9.0 Performance Period / Schedule Requirements

Scope / Statement of Work

Task Order /

Project Title:

334294: Install Concrete Pad and Electrical Utilities for Climate

Controlled Seed Storage Unit

Park /

Park Unit:

Grand Canyon National Park (GRCA)

Task Order#:

Prepared By: Lonnie Pilkington/ Jose Marte

Date: 2/3/2025

1.0 PROJECT DESCRIPTION / SUMMARY: The purpose of this project is to install a concrete pad and electrical utilities to support a climate-controlled seed storage unit.

2.0 OBJECTIVES:

Install concrete pad and underground electrical utilities to support a climate-controlled seed storage unit.

3.0 BACKGROUND:

The park purchased a climate-controlled seed storage unit scheduled for delivery on May 1, 2025. Properly storing seeds is essential for keeping them viable and ready for future planting.

One key factor in seed storage is the temperature of the environment. It is crucial to store seeds in a cool, dry place to prevent them from losing their viability.

4.0 SPECIFIC WORK / TASKS (NOT LISTED IN ORDER OF TASK):

a. Review site conditions with NPS staff, develop schedule and safety plan to perform work in a logical sequence to avoid negatively impacting staff access and providing safe areas for passage.

b. Provide all project submittals for NPS review and approval.

c. Verify location of utilities.

i. Pre-excavation Conference: Conduct conference at the Project site ot place designated by the contracting officer

d. Conduct layout with survey of site conditions and grades, review with CO and or COR for approval prior to construction.

e. Sub-base: 15’x23’x5”. Compacted ¾” Open-Graded Crushed Stone or Gravel.

f. Vapor Retarders: Polyethylene sheet, ASTM D 4397, not less than 10 mils (0.25 mm) thick.

i. Place, protect, and repair sheet vapor retarder according to ASTM E 1643 and manufacturer's written instructions. Lap joints 6 inches (150 mm) and seal with manufacturer's written instructions

g. Ready-Mixed Concrete:

i. Concrete placement shall not be performed when weather is expected to be at or below 40° F or exceed 95° F for proper curing of the concrete.

ii. Measure, batch, mix, and deliver concrete according to ASTM C 94/C 94M and

ASTM C 1116/C 1116] and furnish batch ticket information.

iii. Slab size: 14’x22’x6” at 5,000 psi.

iv. Protection & Curing.

1. General: Protect freshly placed concrete from premature drying and excessive cold or hot temperatures. Comply with ACI 306.1 for cold-weather protection and with ACI 301 (ACI 301M) for hot-weather protection during curing.

2. Evaporation Retarder: Apply evaporation retarder to concrete surfaces if hot, dry, or windy conditions cause moisture loss approaching 0.2 lb/sq. ft.

x h (1 kg/sq. m x h) before and during finishing operations. Apply according to manufacturer's written instructions after placing, screeding, and bull floating or darbying concrete but before float finishing

3. Curing Methods: Cure concrete for at least seven days by:

a. Curing and Sealing Compound: Clear, Waterborne Membrane-

Forming Curing and Sealing Compound: ASTM C 1315, Type 1, Class A. Apply uniformly to floors and slabs indicated in a continuous operation by power spray or roller according to manufacturer's written instructions.

v. Steel Reinforcement: #4 rebar, 12” OC. ASTM A 615/A 615M, Grade 60

(Grade 420), deformed.

1. Bar Supports: Bolsters, chairs, spacers, and other devices for spacing, supporting, and fastening reinforcing bars and welded wire reinforcement in place. Manufacture bar supports from steel wire, plastic, or precast concrete according to CRSI's "Manual of Standard Practice

2. Comply with CRSI's "Manual of Standard Practice" for fabricating, placing, and supporting reinforcement.

3. Do not cut or puncture vapor retarder. Repair damage and reseal vapor retarder before placing concrete.

vi. Joints: Contraction Joints in Slabs-on-Grade: Form weakened-plane [grooved] or

[sawed] contraction joints, sectioning concrete into areas as indicated:

1. Construct contraction joints for a depth equal to at least of 25% of the slab's thickness and placed no more than 8 to 12 feet apart as follows:

2. Grooved Joints: Form contraction joints after initial floating by grooving and finishing each edge of joint to a radius of 1/8 inch (3.2 mm). Repeat grooving of contraction joints after applying surface finishes. Eliminate groover tool marks on concrete surfaces.

3. Sawed Joints: Form contraction joints with power saws equipped with shatterproof abrasive or diamond-rimmed blades. Cut 1/8-inch- (3.2-mm-) wide joints into concrete when cutting action will not tear, abrade, or otherwise damage surface and before concrete develops random contraction cracks.

4. Joint-Filler Strips: To match concrete color and composed of any of the following:

a. Sponge rubber, flexible foam (polyethylene, polyurethane, polypropylene), self-expanding cork, and bituminous or resin impregnated cork or fiber board.

vii. Surface Finish: Float and Fine-Broom Finish: Apply a first trowel finish to surfaces. While concrete is still plastic, slightly scarify surface with a fine broom.

viii. Elevation: Slab will be 1” above grade of adjacent soil. excavated soil to be used to fill in, level, and compact the immediate surrounding area and immediate non-vegetated areas nearby. Any soil remains after filling and compacting these areas, will be hauled to park's material staging area 6 miles away (36.006129087733065, -112.1326083492791).

h. Concrete Testing: Engage a qualified testing provider to perform concrete tests. Provide test results accordingly and submit these results to the Contracting Officer's

Representative (COR) for review and approval.

i. Strength of mixture will be satisfactory if test value does not differ from specified by more than 500 psi. Concrete will be considered defective otherwise.

ii. Collect 6 total samples. Three to be tested at 7 & 14 days and conform to typical

5,000 psi concrete strength gains:

Age Typical Strength (% of 28-day strength) Estimated Strength

3 days ~ 40% ~2,000 PSI

7 days ~ 65-70% ~3,250 – 3,500 PSI

14 days ~ 85-90% ~4,250 – 4,500 PSI

i. Electrical Utility: Extend electrical power from Grand Canyon National Park

Greenhouse to concrete pad. The total distance from the existing electrical panel to the concrete pad is 134 feet, of which 30 - 60 feet must be routed underground.

i. Electrical Requirement: Voltage: 208-230, Phase: Single, Cycle: 60 hz, Amperage: 34.1 MCA, Horsepower: 2HP, Conductors: 4

1. See attached product spec sheet.

ii. Ensure all conduit, wiring, and junction box installations comply with current

National Electrical Code (NEC), including appropriate conduit, wire type, and required trench depth.

1. Provide submittal of electrical specifications for review & approval.

iii. Electrical Supply: Contractor to verify load capacity at service panel.

5.0 OPTIONAL WORK / TASKS:

6.0 GOVERNMENT FURNISHED EQUIPMENT / MATERIALS / OTHER:

a) Government to provide restroom facilities for contractor/s.

7.0 SPECIAL CONDITIONS / REQUIREMENTS:

a) Action & Informational Submittals:

1.0 Project Schedule

2.0 Concrete design mixture

3.0 Concrete test reports.

b) Potable water is available on site at the GRCA greenhouse/nursery.

c) Contractor to submit equipment access plan for equipment to be used on site and area to be clearly marked in field for park review and approval prior to equipment mobilization on site. Limit equipment traffic to within footprint of proposed work.

d) All work to stay within limit of disturbance.

e) Provide protective matting to avoid unnecessary soil disturbance.

f) NPS will provide staging area for equipment storage. Staging area will not be secured by

NPS at end of business day and NPS will not be responsible for any damage or loss.

g) Contractor shall be allowed to use one parking spaces in the greenhouse parking lot.

Location of material and equipment staging shall not impede staff use of the area.

Contractor to review location with NPS for approval.

8.0 PLACE OF PERFORMANCE:

a) 1402 Kennel Rd., Grand Canyon National Park, Greenhouse and Nursery, Grand Canyon, AZ 86023. 36.04937485599117, -112.14907668575529

9.0 PERFORMANCE PERIOD / SCHEDULE REQUIREMENTS:

a. All on-site work must be completed between 24 March 2025 and 24 April 2025.

i. NOTE: Concrete MUST be poured by 16 April 2025 at the latest.

b. No work to be completed on weekends or Federal Holidays without prior approval by CO

2-business days in advance.

c. Submit proposed schedule with bid proposal.