Amendment 0002_1240LT25R0012_QAs and Matl Spec_05SEP2025.pdf

GAOA)

Q47 A47 29 August 2025 was the last day for Government receipt of offeror questions.

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A53 Line Items 0001–0013 correspond to Plan Sheets labeled G, F, E, and B, which do not begin with "AA." In contrast, Line Items 0014–0032 are tied to Plan Sheets that do start with "AA." For example, Line Items 0001 and 0014 both invoice clearing, grubbing, and stripping, but they pertain to distinct work and should be priced separately.

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MATERIAL SPECIFICATIONS

Chapter 3 National Standard Material Specifications

Part 642 National Engineering Handbook

592 1

(210 642 H, Amend.2, Sept. 2018) (

Material Specification 592 Geotextile

1. Scope This specification covers the quality of geotextile, including geotextile for temporary silt fence.

2. General Requirements Fiber (thread and yarn) used in the manufacture of geotextile must consist of synthetic polymer composed of a minimum of 85 percent by weight polypropylene, polyester, polyamide, polyethylene, polyolefin, or polyvinylchloride. The fiber must be formed into a stable network of filaments retaining dimensional stability relative to each other. The geotextile must be free of defects such as holes, tears, and abrasions.

The geotextile must be free of any chemical treatment or coating that significantly reduces its porosity.

Fibers must contain stabilizers, inhibitors, or both to enhance resistance to ultraviolet light. Geotextile, other than that used for temporary silt fence, must conform to the requirements in tables 592 1 or 592 2, as applicable. Geotextile used for temporary silt fence must conform to ASTM D6461.

Thread used for factory or field sewing must be of a color contrasting to the color of the fabric and made of high-strength polypropylene, polyester, or polyamide material. It must be as resistant to ultraviolet light as the geotextile being sewn.

3. Classification There are two geotextile classifications, woven and nonwoven. Geotextile for temporary silt fence may be either woven or nonwoven. Slit film woven geotextile may not be used except for temporary silt fence.

Woven geotextiles are made from fabric that is formed by the uniform and regular interweaving of the threads or yarns in two directions. Woven fabrics must be manufactured from monofilament yarn formed into a uniform pattern with distinct and measurable openings, retaining their position relative to each other. The fabric must have a selvedge edge or otherwise be finished to prevent unraveling.

Nonwoven geotextiles are made from fabric that is formed by a random placement of threads in a mat and bonded by needle punching, heat bonding, or resin bonding. Nonwoven geotextile must have distinct but variable small openings, retaining their position relative to each other when bonded. The use of heat- or resin-bonded nonwovens is restricted as specified in note 2 of table 592-2.

4. Sampling and Testing The geotextile must conform to tables 592 1, 592 2, or ASTM D6461 as applicable for the product type shown on the label. Documentation described in either a. or b. below is required to verify the product meets the specified requirements:

a. Product properties as listed in the latest edition of the "Specifiers Guide," Geosynthetics (Industrial Fabrics Association International, 1801 County Road B, West Roseville, MN 55113-4061 or at http://www.geosindex.com), and that represent average roll values, are acceptable.

b. Test data from the geotextile production run for each of the specified tests listed in tables 592 1, 592

2, or ASTM D6461, as applicable.

5. Shipping and Storage Each roll of geotextile must be labeled or tagged to clearly identify the brand, class, and the individual production run in accordance with ASTM D4873. The geotextile must be shipped and transported in rolls wrapped with a cover for protection from moisture, dust, dirt, debris, and ultraviolet light. The cover must be maintained undisturbed to the maximum extent possible before placement.

Part 642

(210 642 H, Amend.2, Sept. 2018)

Material Specification 592 Geotextile (continued)

Table 592 1 Requirements for woven geotextiles 1/

Property Test method Class I Class II Class III Class IV

Grabtensile strength (lb)

ASTM D4632 247 minimum 180 minimum 180 minimum 315

Elongation at failure

ASTM D4632 <50 <50 <50 <50

Trapezoidal tear strength (lb)

Puncture strength (lb)

Ultraviolet stability (% retained strength)

Permittivity (sec 1) ASTM D4491 as specified

Apparent opening size (AOS) 2/

ASTM D4751 as specified

Percent open area

(POA) (%)

USACE

3/CWO-02215-86

as specified

1/ All values are minimum average roll values (MARV) in the weakest principal direction, unless otherwise noted.

2/ Maximum average roll value.

3/ Note: CWO is a USACE reference.

ASTM D4533 90 minimum 67 minimum 67 minimum 112 minimum

ASTM D6241 495 minimum 371 minimum 371 minimum 618 minimum

ASTM D4355 50 minimum 50 minimum 50 minimum 70 minimum

Part 642

592 3

(210 642 H, Amend.2, Sept. 2018) (

Material Specification 592 Geotextile (continued)

Table 592 2 Requirements for nonwoven geotextiles 1/

Property Test method Class I 2/ Class II 2/ Class III 2/ Class IV 2/

Grab tensile strength (lb)

ASTM D4632

grab test

202 minimum 157 minimum 112 minimum 202 minimum

Elongation at failure (%)

ASTM D4632 50 minimum 50 minimum 50 minimum 50 minimum

Trapezoidal tear strength (lb)

ASTM D4533 79 minimum 56 minimum 40 minimum 79 minimum

Puncture strength (lb) ASTM D6241 433 minimum 309 minimum 223 minimum 433 minimum

Ultraviolet light ASTM D4355 50 minimum 50 minimum 50 minimum 50 minimum (retained strength) (%)

Permittivity sec 1 ASTM D4491 0.70 minimum or as specified

Apparent opening size (AOS) (mm) 3/

ASTM D4751 0.22 maximum or as specified

1/ All values are minimum average roll values (MARV) in the weakest principal direction, unless otherwise noted.

2/ Needle punched geotextiles may be used for all classes. Heat-bonded or resin-bonded geotextiles may be used for class IV only.

3/ Maximum average roll value.