Published by department of transportation

21-2.02C(3) Imported Topsoil

1. Consist of fertile, friable soil of loamy character that contains organic matter in quantities natural to the region and be capable of sustaining healthy plant life

2. Be free from deleterious substances such as litter, refuse, toxic waste, stones larger than 1 inch in size, coarse sand, heavy or stiff clay, brush, sticks, grasses, roots, noxious weed seed, weeds, and other substances detrimental to plant, animal, and human health

21-2.02D Fiber

Wood fiber must be a long-strand, whole-wood fiber thermo mechanically processed from clean whole wood chips.

Cellulose fiber must be made from natural or recycled pulp fiber, such as wood chips, sawdust, newsprint, chipboard, corrugated cardboard, or a combination of these materials.

Alternate fiber must be a long strand, whole natural fiber made from clean straw, cotton, corn, or other natural feed stock.

Fiber must:

1. Disperse into a uniform slurry when mixed with water.

2. Contain 3/8-inch fiber strands for at least 25 percent by total volume.

3. Have at least 40 percent retained when passed through a no. 25 sieve.

4. Have an initial moisture content of no more than 15 percent of its dry weight when tested under California Test 226. The moisture content must be marked on the packaging.

5. Have a water holding capacity, by weight, of at least 1,200 percent when tested under ASTM D7367.

6. Be nontoxic to plants and animal life.

7. Be free of synthetic or plastic materials, lead paint, printing ink, varnish, petroleum products, seed germination inhibitors, and chlorine bleach.

8. Contain less than 250 ppm of boron.

9. Be colored to contrast with the area where it is to be applied. The coloring agent must be biodegradable, nontoxic, and free from copper, mercury, and arsenic, and must not stain concrete or painted surfaces.

21-2.02E Tackifier

Tackifier must be one of the following:

1. Plant based natural high-molecular-weight polysaccharide. Plant-based tackifier must be a high viscosity hydrocolloid that is miscible in water, and labeled as either guar, psyllium, or starch, as follows:

1.1. Guar gum based tackifier must be derived from the ground endosperm of the guar plant, Cyanmopsis tetragonolobus. It must be treated with dispersing agents for easy mixing. It must be able to be diluted at the rate of 1 to 5 pounds per 100 gallons of water.

1.2. Psyllium based tackifier must be manufactured from the finely ground, mucilloid coating of Plantago ovata or Plantago ispaghula seeds and able to dry and form a firm but rewettable membrane.

1.3. Starch based tackifier must be a nonionic, water-soluble, granular material derived from corn, potato, or other plant-based source.

2. Prepackaged liquid or dry powder polymeric emulsion blend. Prepackaged tackifier must be an anionic formulation with a residual monomer content not exceeding 0.05 percent by weight. The tackifier must contain and be labeled with one of the following as the primary active ingredients:

2.1. Acrylic copolymers and polymers.

2.2. Polymers of methacrylates and acrylates.

2.3. Copolymers of sodium acrylates and acrylamides.

2.4. Polyacrylamide and copolymer of acrylamide.

2.5. Hydrocolloid polymers.

21-2.02F Seed

1. Prohibited noxious weed seed

2. More than 1.0 percent total weed seed by weight
Seed with a germination rate lower than the minimum rate shown may be used if authorized.

Deliver seed to the job site in unopened, separate containers with the seed tag attached.

Measure individual seed species and mix in the presence of the Engineer.

21-2.02G Fertilizer

21-2.02H Straw

Straw must be free of plastic, glass, metal, rocks, and refuse or other deleterious material.

Straw must have not have been used for stable bedding.

21-2.02I Reserved

21-2.02J Bonded Fiber Matrix

Fiber for bonded fiber matrix must be 100 percent wood fiber and comply with the specifications for fiber under section 21-2.02D, except that at least 50 percent is retained when passed through a no. 25 sieve.

Tackifier for bonded fiber matrix must:

1. Be bonded to the fiber or prepackaged with the fiber by the manufacturer

2. Contain a minimum of 10 percent of the combined weight of the dry fiber, activating agents, and additives

3. Be an organic, high viscosity colloidal polysaccharide with activating agents or a blended hydrocolloid-based binder

21-2.02K Compost

1. Green material consisting of chipped, shredded, or ground vegetation or clean, processed, recycled wood products

2. Biosolids

3. Manure

4. Mixed food waste
Compost must not be derived from mixed municipal solid waste and must not contain paint, petroleum products, pesticides, or other chemical residues harmful to plant or animal life.

Process compost materials under 14 CA Code of Regs § 17868.

Metal concentrations in compost must not exceed the maximum listed under 14 CA Code of Regs § 17868.

Compost must comply with the requirements shown in the following table:

21-2.02L–21-2.02N Reserved

21-2.02O Rolled Erosion Control Products

21-2.02O(1) General

RECP must be a long-term, degradable, open-weave textile manufactured or fabricated into rolls designed to reduce soil erosion and assist in the growth, establishment, and protection of vegetation. RECP must conform to the classification system established by the ECTC.

Deliver RECP in suitable wrapping to protect against moisture and extended ultraviolet exposure occurring before placement.

21-2.02O(2) Jute Mesh

Jute mesh must be ECTC Type 3B made of unbleached and undyed woven jute. Jute mesh must comply with the requirements shown in the following table:

Jute Mesh
Quality characteristic	Test method	Requirement
Strands per foot (min, in each direction)	--	14–20
Roll width (min, inches)	--	48
USLE C-Factor for a 1.5:1 (H:V) unvegetated slope	--	≤ 0.25
Shear stress (max, psf)	ASTM D6460	2.0
Tensile strength (min, psf)	ASTM D5035	100
Functional longevity (months)	--	12
Average open area (%)	--	65 ± 5
Weight of fabric (min, oz/sq yd)	ASTM D3776	14.4–19.2

21-2.02O(3) Netting

Netting must be ECTC Type 4 and made of 100 percent coconut fiber woven into a matrix. Netting must comply with the requirements shown in the following table:

Netting
Quality characteristic	Test method	Requirement
		Type A	Type B	Type C
Thickness (min, inch)	ASTM D6525	0.30
Roll width (min, inches)	--	72–158
USLE C-Factor for a 1:1 (H:V) unvegetated slope	--	≤ 0.25
Shear stress (max, psf)	ASTM D6460	2.25	4.4	4.6
Tensile strength (min, psf)	ASTM D5035	125
Functional longevity (months)		36
Average open area (%)		63 ± 5	48 ± 5	38 ± 5
Weight of fabric (min, oz/sq yd)	ASTM D3776	11.8	20	26

21-2.02O(4) Erosion Control Blankets

Erosion control blanket must be ECTC Type 2D and made of processed natural fibers that are mechanically, structurally, or chemically bound together to form a continuous matrix that is surrounded by 2 natural nets. Erosion control blanket must comply with the requirements shown in the following table:

Erosion Control Blanket
Quality characteristic	Test method	Requirement
		Type A	Type B	Type C
Roll width (min, inches)	--	72
Matrix (%) Straw/coconut Woven coir (coconut fiber) Wood excelsior (6 inches or longer)	--	70/30 -- --	-- 100 --	-- -- 80
USLE C-Factor for a 1:1 (H:V) unvegetated slope	--	≤ 0.20
Shear stress (max, psf)	ASTM D6460	1.75
Tensile strength (min, psf)	ASTM D5035	75
Functional longevity (months)	--	12

21-2.02O(5) Turf Reinforcement Mats

Turf reinforcement mat must be ECTC Type 5 and nondegradable, open-weave textile made of synthetic fibers, filaments, nets, wire mesh or other elements, processed into a permanent, 3-dimensional matrix. Turf reinforcement mat must comply with the requirements shown in the following table:

Turf Reinforcement Mat
Quality characteristic	Test method	Requirement
Type A		Type B	Type C
Roll width (min, inches)		--	72
Thickness (min, inches)	ASTM D6525	0.25
USLE C-Factor for a 1:1 (H:V) unvegetated slope	--	≤ 0.25
Shear stress (max, psf)	ASTM D6460	6	8.4	10
Tensile strength (min, psf)	ASTM D5035	125	150	175
Functional longevity (months)	--	36
UV stability (% at 500 hrs)	ASTM D4355	80

21-2.02P Fiber Rolls

Fiber roll must be a premanufactured roll filled with rice or wheat straw, wood excelsior, or coconut fiber. Fiber roll must be covered with biodegradable jute, sisal, or coir fiber netting secured tightly at each end and must be one of the following:

1. 8 to 10 inches in diameter and at least 1.1 lb/ft

2. 10 to 12 inches in diameter and at least 3 lb/ft
Fiber roll must have a minimum functional longevity of 1 year.

21-2.02Q Compost Socks

Compost sock must be a mesh tube 12 inches in diameter filled with compost and must have a functional longevity of 1 year.

The mesh tube must be composed of a natural biodegradable product such as cotton, jute, sisal, burlap, or coir. The mesh tube must be clean, evenly woven, and free of encrusted concrete or other contaminating materials, cuts, tears, broken or missing yarns, and thin, open, or weak places.

Compost for compost sock must comply with section 21-2.02K, except the particle size must be for coarse compost.

21-2.02R Fasteners

Wood stakes must be untreated fir, redwood, cedar, or pine and cut from sound timber. The ends must be pointed for driving into the ground. Notched stakes must be at least 1 by 2 by 24 inches in size. Stakes without notches must be at least 1 by 1 by 24 inches.

Metal stakes must be at least 1/2 inch in diameter and have tops bent at 90-degree angles or capped with an orange or red plastic safety cap that fits snugly onto the metal stake.

Steel staples must be a minimum of 11-gauge, 6-inch, U-shaped staples with a 1-inch crown. Provide heavier gauge and greater length if required by the job site conditions. You may use an alternative attachment device such as a 100 percent biodegradable fastener to install RECP instead of staples.

Rope to fasten fiber rolls and compost socks must be 1/4 inch in diameter and biodegradable, such as sisal or manila.

21-2.02S–21-2.02V Reserved

Directory: esc
esc -> Biblical Eschatology Presentation by: D. Paul Beck May 4, 2016 Ground Rules
esc -> Mikael Håfstrӧm Screenplay by Miles Chapman and Arnell Jesko
esc -> Escort affinity Program for Audi Club Members
esc -> Preliminary entry form pistol
esc -> Application form
esc -> Request from Asian and Pacific Training Centre for Information and
esc -> Constitution of the engineering student council university of maryland
esc -> Subdisciplines of Earth Science Geology; study of the earth

Download 6.74 Mb.

Share with your friends: