Attachment 1: Performance Work Statement

Performance Work Statement
1. Detachment 2, 18th Civil Engineer Squadron, Bellows Air Force Station (BAFS), desires to purchase ~1,000 Tons of 1.5-Inch (37.5 mm) Dense-Graded Aggregate Base Course. The material will be primarily used to repair, stabilize, and maintain the unpaved Tinker Bridge bypass route supporting continuous installation and construction traffic.

2. Regulatory Requirements:

a. All aggregate material must comply with UFC 3-250-01 (Pavement Design for Roads) and UFC 3-250-11 (Soil Stabilization for Pavements).
b. Material must conform strictly to ASTM D2940 / D2940M (Standard Specification for Graded Aggregate Material for Bases or Subbases for Highways or Airports) and Hawaii Department of Transportation (HDOT) Highways Division Standard Specifications for Road and Bridge Construction, Section 703.06 (Aggregate for Untreated Base). c. Material must be chemically inert, non-toxic, and free of petroleum, clay, organic matter, or chemical contaminants in accordance with 32 CFR 989 (Environmental Impact Analysis Process) and Hawaii Administrative Rules Title 11 (State of Hawaii Department of Health).

3. Material Physical and Sizing Requirements:

a. Geological Composition: 100% crushed virgin Hawaiian basaltic lava rock (dense, hard, durable, unweathered native volcanic stone). Crushed coral, river rock, alluvial gravel, uncrushed stone, recycled asphalt pavement (RAP), and recycled concrete aggregate (RCA) are strictly prohibited.
b. Particle Angularity & Fracture: 100% crushed quarry rock with sharp, mechanically fractured angular faces. A minimum of 90% of particles by weight must have two or more fractured faces per ASTM D5821. Rounded, smooth, or spherical river gravel will not be accepted. c. Gradation Requirements: Dense-graded 37.5 mm (1.5-inch nominal maximum size) meeting the following master sieve distribution limits per ASTM D2940 / HDOT Section 703.06: o Sieve 37.5 mm (1.5 in): 100% passing by weight
o Sieve 25.0 mm (1.0 in): 90% to 100% passing by weight o Sieve 19.0 mm (3/4 in): 65% to 90% passing by weight
o Sieve 4.75 mm (No. 4): 35% to 55% passing by weight
o Sieve 0.075 mm (No. 200): 2% to 9% passing by weight (non-plastic mineral dust) d. Coloration: Uniform dark charcoal grey to black (typical of high-density Oahu volcanic quarry basalt).

4. Technical and Capacity Performance Requirements:

a. Use ASTM D2940/HDOT Section 703.06 compliance and current quarry sieve analysis only. b. Material must be capable of achieving 98% to 100% maximum dry density under standard