DIRTBAG SPECIFICATIONS

 

1.0 Description

1.1 This work shall consist of furnishing, placing and removing the DIRTBAG pumped sediment control device as directed by the design engineer or as shown on the contract drawings. The DIRTBAG pumped-silt control system is marketed by:

ACF Environmental

1801 A Willis Road
Richmond, VA 23237
Phone: 1-800-644-9223
Fax: 1-804-271-3074

 

2.0 Materials

2.1 DIRTBAG

2.1.1 The DIRTBAG shall be nonwoven bag which is sewn with double needle machine using high strength thread.

2.1.2 Seams All structural seams will be sewn with high strength, double stitched "J" type. Seam strength test will have the following minimum average roll values:

 

DIRTBAG STYLE

TEST METHOD

TEST RESULT

DIRTBAG 53

ASTM D-4884

60 lb / in

DIRTBAG 55

ASTM D -4884

100 lb / in

 

2.1.3 The DIRTBAG will have an opening large enough to accommodate a four (4) inch discharge hose with attached strap to tie off the hose to prevent the pumped water from escaping from the DIRTBAG without being filtered.

2.1.4 The geotextile fabric shall be nonwoven fabric with the following properties:

 

DIRTBAG 53 Nonwoven

 

PROPERTY

TEST METHOD

TEST RESULT

Weight

ASTM D-3776

8 oz / yd

Grab Tensile

ASTM D-4632

200 lbs

Punture

ASTM D-4833

130 lbs

Flow Rate

ASTM D-4491

80 Gal/ Min /Ft²

Permitivity

ASTM D-4991

1.4 sec¯¹

UV Resistance

ASTM D-4355

70%

AOS % Retained

ASTM D-4751

100

 

OR

DIRTBAG 55

 

PROPERTY

TEST METHOD

TEST RESULT

Weight

ASTM D-3776

10 oz / yd

Grab Tensile

ASTM D-4632

270 lbs

Punture

ASTM D-4833

150 lbs

Flow Rate

ASTM D-4491

70 Gal/ Min /Ft²

Permitivity

ASTM D-4991

1.3 sec¯¹

UV Resistance

ASTM D-4355

70%

AOS % Retained

ASTM D-4751

100

 

*All properties are minimum average roll value except the weight of the fabric which is given for information only.

3.0 Construction Sequence

3.1 General

3.1.1 Install the DIRTBAG on a slope. It should be placed so the incoming water flows into the bag and will flow through the DIRTBAG and then flow off the site without creating more erosion. The neck of the DIRTBAG should be tied off tightly, to stop the water from flowing out of the DIRTBAG, without going through the walls of the bag. To increase the surface area being used, DIRTBAG may be placed on a gravel bed to allow water to flow in all directions.

3.1.2 The DIRTBAG is considered full and should be disposed when it is impractical for the bag to filter the sediment out at a reasonable flow rate and should be replaced with a new DIRTBAG.

3.1.3 Disposal may be accomplished as directed by the design engineer. If the site allows, the DIRTBAG may be buried on site and seeded, visible fabric removed and seeded or removed from site to a proper disposal area.

 

4.0 Basis of Payment

4.1 The payment for any DIRTBAG used during the construction is to be included in the bid of overall erosion and sediment control plan unless a unit price is requested.

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