A02.12_Description of Requirement - Soil Materials.pdf

Description of Requirement

Soil Material for Master BPA

Background:

The US Army Corps of Engineers Research and Development Center (ERDC) requires clayey-sand (SC), clayey-gravel (GC), sand (SP), silt (ML), high plasticity clay (CH), masonry sand, 610 gravel, #57 gravel, #1 crushed stone, large gravel, and rip rap material for backfills in disturbed soil regions, road base, and construction of test plots and beds at Fort Polk, LA and ERDC-Vicksburg, MS.

Specifications/Requirements:

If applicable, soils must meet USCS specifications.

The contractor shall provide, at a minimum, the following soil material upon BPA Call awards. The requested material is to include the following, but is not limited to:

1. Clayey Sand (SC): Clayey sands, sand-clay mixtures. Per USCS.

➢ More than 50% of material is larger than No. 200 sieve size.

➢ 50% or more of the coarse fraction is smaller than No. 4 sieve size.

➢ Sands with fines must have more than 12% fines.

➢ The Atterberg limit must be above “A” line with P.I. greater than 7. (Plasticity Chart referenced below.)

2. Clayey Gravel (GC): Clayey gravels, gravel-sand-clay mixtures. Per USCS.

➢ More than 50% of the material is larger than No. 200 sieve size.

➢ More than 50% of coarse fraction is larger than No. 4 sieve size.

➢ Gravels with fines- more than 12% fines

➢ The Atterberg limits must be above “A” line with P.I. greater than 7. (Plasticity Chart referenced below)

3. Sand (SP): Well-graded sands, gravelly sands, little or no fines. Per USCS.

➢ More than 50% of material is larger than No. 200 sieve size.

➢ 50% or more of the coarse fraction is smaller than No. 4 sieve size.

➢ Not meeting all gradation requirements for GW.

4. Silt (ML): Inorganic silts and very fine sands, rock flour, silty of clayey fine sands or clayey silts with slight plasticity. Per USCS

➢ 50% or more of material is smaller than No. 200 sieve size.

➢ Liquid limit less than 50%

5. High Plasticity Clay (CH): Inorganic clays of high plasticity, fat clays. Per USCS.

➢ 50% or more of material is smaller than No. 200 sieve size.

➢ Liquid limit 50% or greater

Figure 1: Plasticity Chart

6. Masonry Sand: A fine sand that is smooth and clean. Masonry sand is intended to be sand passing or retained on a #8 sieve (US sieve size). Little to no clay particles.

7. 610 Gravel: Crushed rock gravel mixed with crushed rock or limestone meeting the specifications outlined below:

8. #57 Gravel –A blend of #5 - #7 crushed limestone and is typically around 1-1.5” inches in size.

9. #1 Crushed Stone – Crushed stone typically 2-4” in size.

10. Large Gravel – Typically 1-3”, includes crushed concretes or quarried stones.

11. Rip Rap – Includes large stones, nominal sizes between 4-10”

Delivery Locations:

ERDC Range 19 or ETF Alligator Loop, Hwy 469 Fort Polk, LA 71459

OR

USACE-ERDC

3909 Halls Ferry Rd Vicksburg, MS 39180

Delivery Date:

Individual BPA Calls will provide specific delivery requirements. Typically, time frame is 14 days from issuance of BPA Call.

ORDERING PERIOD: 5-year ordering period