SCOPE
726.01.01 Materials Covered. This specification covers the materials used in erosion control, landscaping, and
irrigation systems. REQUIREMENTS
726.02.01 Certificates and Samples. (a) Topsoil. Obtain from the County Weed Control Agency or the State
Quarantine Officer a written certification that the area from which the topsoil is to be obtained is free from noxious weeds. Topsoil that has been treated with herbicides or sterilants shall be tested by the State D epartment of Agriculture to determine the residuals in the soil. Before imported topsoil is brought on the jobsite, furnish a current report from a recognized testing laboratory indicating the particle size, clay content, the pH factor, and electrical conductivity of the sample.
b.Fertilizer. Provide fertilizer containers with the manufacturer’s guaranteed statement of analysis clearly marked, all conforming to State and F ederal laws. The State Department of Agriculture shall sample the fertilizer befor e use on the project.
c.Compost. Before bulk compost is brought to the jobsite, samples shall have been tested for the specified microbiological and nutrient conditions, including maturity and stability, by a testing laboratory approved for testing of organic materials. Such testing shall have been performed within six months of time the humus is to be furnished to the project. Submit test results for approval.
d.Plants. Plants shall comply with Federal and State laws requiring inspection for plant di seases and infestations. Furnish inspection certificates required by law with each shipment of plants. Furnish certificates for USDA Quarantine No. 63 for White Pine blister rust, and Nevada Quarantine No. 54.05 for European Pine shoot moth with shipments of pines.
e.Seeds. Furnish duplicate copies of a statement signed by the vendor certifying that each lot of seed has been tested by a recognized seed testing laboratory within 6 months before the date of seeding on the project. Submit original laborator y seed tests by lot number a minimum of 30 days before application. Seed tags shall reflect the most recent test date and shall be submitted for approval. All seed is subject to inspection. The State Division of Agriculture shall randomly sample and test s eed before use on the project. Furnish a copy of the State Division of Agriculture’s approval letter.
f.Irrigation Materials. Ascertain that all required tests have been made by approved qualified testing laboratories. Furnish a written certification that all required tests have been satisfactorily completed and that materials and fabrication thereof comply with all the requirements. Receive approval of material before use.
g.Soil Inoculants. Provide 28 gram samples with package labels 30 days prior to application for verification of species and live propogules. Obtain a composite sample from the top, middle, and bottom of the bag and/or micro -bag samples per case. Submit s amples to a soils laboratory capable of testing these samples using the mean Infection Percentage (MIP) assay test method. Submit lab test results for approval.
h.Herbicides. Provide herbicide certificates with the manufacturer’s guaranteed statement of analysis clearly marked, all conforming to S tate and F ederal laws, including pre- emergent herbicides. Herbicides shall not contain soil sterilants.
i.Mulch. Provide mulch certification with the manufacturer’s guaranteed statement of analysis clearly marked, all conforming to S tate and F ederal laws.
j.Tackifier. Provide tackifier certification with the manufacturer’s guaranteed statement of analysis clearly marked, all conforming to State and F ederal laws . The standard swell volume shall be considered as 30 milliliters per gram. Material shall have a swell volume of at least 24 milliliters per gram.
k.Woven Fabric (Weed Barrier). Provide manufacturer’s certification that all materials and fabrication thereof comply with all the requirements. Receive approval of material before use. 726 ROADSIDE MATERIALS PHYSICAL PROPERTIES AND TEST S
726.03.01 Topsoil. Topsoil shall consist of fertile, friable soil of loamy character, and shall contain an amount of
organic matter normal to the region. Obtain topsoil from well -drained arab le land and reasonably free from subsoil, refuse, roots, heavy or stiff clay, stones larger than 25 mm (1 in.) in largest dimension, coarse sand, sticks, brush, litter, and other deleterious substances. Topsoil shall be capable of sustaining healthy plant life. Requirements for topsoil shall be as follows: Particle Size ..................................................................................................................................................... 9.5 mm (3/8 in.) Maximum Clay Content ...................................................................................................................................................... 20% Maximum, by mass pH Factor ................................................................................................................................................................................... 6.4 to 7.4 Electrical Conductivity ................................................................................................ 0.5 to 1.0 mmho/cm of the saturation paste extract
726.03.02 Topsoil (Salvage). The material consists of a mix of native soil, broken- up surface vegetation and
rock materials harvested from the project footprint as shown on the plans. The project footprint is the areas which shall be excavated or covered by fill. Topsoil c onsists of the top 150 mm (6 in.) of material, including surface vegetation and rock, as referenced vertically from the existing ground. Do not substitute material derived from deeper segments, or material from outside of the project limits without approva l. Use topsoil that is free from construction wastes, petroleum byproducts, trash, or other manmade materials. Break the vegetation into pieces 150 mm (6 in.) or less in the longest dimension. Mechanically process removed topsoil, vegetation, and rock to separate material that does not pass through a screen with 150 mm (6 in.) square openings. Consider material in excess of 150 mm (6 in.) waste and do not reintroduce this material to topsoil. Rock exceeding 150 mm (6 in.) may be salvaged and used as speci fied.
726.03.03 Water. Water shall be free of oil, acid, salts, or other substances which are harmful to plants. The
source shall be as approved prior to use.
726.03.04 Herbicides. Use herbicides and pre- emergent herbicides listed in the QPL.
726.03.0 5 Fertilizer. Fertilizer shall be of a standard commercial grade of organic or inorganic fertilizer of the
kind and quality specified in the contract documents, and based on a soils analysis test conducted on soils placed in final graded condition and for plants specified on the plans. Fertilizer may be separate or in a mixture containing the percentage of total nitrogen, available phosphoric acid, and water -soluble potash in the amounts specified. Furnish fertilizers in standard unopened containers with mas s, name of plant nutrients, and manufacturer’s guaranteed statement of analysis clearly marked, all according to State and Federal laws. Acceptable commercial fertilizer will be specified in one of the following forms:
a.A dry free- flowing granular fer tilizer, suitable for application by agricultural fertilizer spreader.
b.A soluble fertilizer ground to a fineness that will permit complete suspension of insoluble particles in water, suitable for application by power sprayer.
c.A granular or pellet ed fertilizer, suitable for application by blower equipment.
d.A nonvolatile liquid fertilizer. Commercial fertilizer (tablets) shall be tightly compressed tablets weighing approximately 21 g designed for the establishment of trees and shrubs. Fertilizer tablets shall conform to the following chemical analysis: Minimum Percentage Organic Nitrogen (derived from Urea- Form) ................................ ................................................................. 20.00 Available Phosphoric Acid (derived from calcium phosphate) ....................................................................... 10.00 Soluble Potash (derived from potassium sulfate) ............................................................................................ 5.00 Combined Sulfur (derived from ferrous ammonium and potassium sulfate) ................................ .................... 1.60 Iron (expressed as metallic, derived from ferrous ammonium sulfate ................................ .............................. 0.35 With written permission, commercial fertilizer tablets designed for the same purpose with a quanti tative analysis that deviates from that listed above may be used. ROADSIDE MATERIALS 726
726.03.0 6 Compost. Compost shall be processed, composted, fine ground organic vegetative materials.
Supply compost free of lumps or clods. The compost shall pass a 12.5 mm (1/2 in.) sieve, and 85% shall pass a 3.35 mm (No. 6) sieve. The compost shall not have ammonia or anaerobic odors. Compost shall also conform to the following requirements: Cation Exchange Capacity (CEC) ........................................................................................................... Greater than 50 meq/100 g Carbon:Nitrogen Ratio ................................................................................................................................................ Less than 20:1 pH (of extract) ................................ ................................ ..................................................................................................... 6.0 – 8.5 Organic Matter Content ................................ ......................................................................................................... Greater than 25% Total Nitrogen (not added) ................................ ....................................................................................................... Greater than 1% Humic Acid .............................................................................................................................................................. Greater than 5% Maturity Index ..................................................................................................... Greater than 50% on Maturity Index at a 10:1 ratio Stability .............................................................................................................. Less than 100 mg - O2/Kg compost dry solids – hour
726.03 07 Mulch. Use mulch listed in the QPL.
a.Straw Mulch. Provide straw mulch materials in an air -dried condition free of noxious weeds, weed seeds, and other materials detrimental to plant life. Provide straw mulch material of approved field grasses indigenous to the area. Obtain from the State Division of Agriculture a written certification that the straw is free of noxious weeds. Rye straw and oat straw will not be acceptable. Hydraulically applied straw mulch shall be wheat or rice straw processed to various particle sizes, mixed with water and tacking material, and applied as a non- clogging slurry using a hydro- seeder. A minimum of 70% of the wheat or rice straw in the mix shall be not less than 12.5 mm ± 6 mm (1/2 in. ± 1/4 in.) in length. Straw particles may be longer provided that the particles can be used with the selected hydro- seeder without clogging. Hydraulically applied straw mulch, as furnished by the manufacturer, may contain up to 10% paper or cotton materials in dry weight, as well as 5% to 20% of wood fiber in dry weight. The combined dry weight percentage of paper, cotton, and wood fiber materials together shall be 15% to 30% of the mulch.
b.Thermally -Refined Wood Fiber. Wood cellulose fiber mulch shall be from thermo- mechanically processed wood, processed to contain no growth germination inhibiting factors and dye a suitable color to facilitate inspection of the placement of the material. The mulch shall be from virgin wood manufactured and processed so the fi bers will remain in uniform suspension in water under agitation to form homogenous slurry. Paper products will not be considered as virgin wood. The material shall conform to the following requirements: Virgin Wood Cellulose Fiber ....................................................................................................................................... 90% Minimum Recycled Cellulose Fiber ............................................................................................................................................ 10% Maximum Ash Content .................................................................................................................................................................. 0.8% ± 0. 3% pH ...................................................................................................................................................................................... 3.5 to 5.5 Water Holding Capacity ( water:fiber ) ........................................................................................................................... 10:1 Minimum
c.Wood Chips and Shavings. Manufacture shavings from any clean softwood. Manufacture wood chips from any clean, green softwood. Do not supply chips from kiln- dried or air -dried material. Produce chips by machinery equipped with knives or blades which cut rather than shred or break the material. Grade chips so that substantially all chips are from 12.5 to 75 mm (1/2 to 3 in.) in len gth, 12.5 to 38 mm (1/2 to 1 1/2 in.) in width and from 3 to 12.5 mm (1/8 to 1/2 in.) in thickness.
726.03.0 8 Tackifier . Use tackifiers listed in the QPL. Tacking agent shall be a naturally occurring organic
compound, and shall be non- toxic. The tacking agent shall be a product typically used for binding soil and mulch in seeding or erosion control operations. Approved types shall consist of mucilage or gum by dry weight as active ingredient obtained from guar or plantago. The tacking agent shall be labeled indicating the type and mucilage purity.
726.03.0 9 Erosion Control Fabric. Erosion control fabric shall be as specified in the contract documents .
726.03.10 Plants. Supply nursery grown plants representative of their normal species and true to type or name
as shown on the plans and conforming to the American Standard for Nursery Stock, No. 1 grade, AAN, Inc., latest edition , ASA Spec. Z 60.1. Tag plants by the most recent standard practice recommended by the AAN and to the latest edition of Standardized Plant Names, as adopted by the American Joint Committee on Horticultural Nomenclature. 726 ROADSIDE MATERIALS
726.03.11 Seeds. Furnish grasses, legumes, or cover crop seed in standard containers or sealed bags on
which show the following information:
a.Seed name, scientific and common name.
b.Lot number.
c.Net mass.
d.Percentage of pure live seed including hard and dormant seed (in case of legumes , percentage of germination to include hard seed).
e.Percentage of weed seed content and inert material clearly marked for each kind of seed according to applicable State and Federal laws. Weed seed shall not exceed 0.5% of the pure live seed and shall not include any seed of Cheatgrass (Bromus tectorum) or Sweet Clovers (Melilotus officianalis, M. alba). Crop seed shall not exceed 0.5% of the pure live seed.
f.No noxious weed seed present.
g.Percent crop seed.
h.Supplier name, address , and phone number. Do not use seed which has become wet, moldy , or otherwise damaged in transit or storage. Provide seed at least 95% pure and having a minimum of 85% germination. Store seed in a cool watertight facility with temperatures less than 27 °C ( 81 °F). Within 60 days of contract award, submit a statement from the seed supplier that the order for the seed mixes was received by the supplier. Indicate in the statement if any of the seed species are projected to be in short supply. Species and or variety substitution will be allowed only upon written approval.
726.03.12 Soil Inocu lants. Mycorrhizal inoculants shall consist of spores, mycelium, and mycorrhizal root
fragments in a solid carrier suitable for handling by dry application. The carrier shall be the material in which the inoculum was originally produced and may include organic materials, vermiculite, perlite, calcined clay, or other approved materials consistent with proper application and good plant growth. Each endomycorrhizal inoculum shall carry a supplier’s guarantee of number of propagules per unit weight or volume of bulk material. The inocula shall contain at a minimum 120 live spores per gram. Label product bags with a lot number and the harvest date of the inocula. Provide 28 gram samples 30 days before application for verification of species and spore counts. Transport and store inocula in areas with a temperature less than 32 °C (90 °F) and keep temperatures above freezing.
726.03 13 Tree Ties. Tree ties shall be strips of vinyl coated nylon, rubber , or other flexible, durable,
nonhardening, ultraviolet resistant, long- life material, approximately 25 to 50 mm (1 to 2 in.) wide and approximately 0.25 mm (10 mil) thick. Tree tie shall be secured to a wooden post with one galvanized nail or 38 mm ( 1.5 in.) galvanized fence staple. For 15 gallon and smaller trees use 0.6 m ( 24 in. ) length tie and use 0.8 m ( 32 in.) length for all larger sized trees.
726.03 14 Irrigation Pipe and Fittings. (a) Copper pipe shall be Type K and sized to operate at velocity of less
than 7 feet per second (fps).
b.Plastic pipe, except drip lines, shall be polyvinyl chloride (PVC) 1120 or 1220 pressure pipe as shown on the plans and shall conform to ASTM D1785. Extrude PVC pipe from 100% virgin material approved by the National Sanitation Foundation (NSF). Plasti c pipe, except drip lines, shall be pressure rated at 2070 kPa (300 psi) (Schedule 40) minimum. Bell and spigot PVC pipe may be used in lieu of plain end pipe and couplings. Fittings for PVC plastic pipe shall conform to ASTM D2466.
c.Polyethylene used in the manufacture of polyethylene fittings shall conform to ASTM D1248, for Type III. Polyethylene fittings used in assembli ng swing joint risers shall be S chedule 80 conforming to ASTM D3261. ROADSIDE MATERIALS 726
d.Plastic pipe for drip lines shall be flexible PVC conforming to ASTM D2287, Cell -type 6640400. Wall thickness of drip lines shall conform to the following when determined according to ASTM D2122: Hose Size- Nominal Minimum * Range mm (in.) mm (in.) (%) 15 (1/2) ................................ ............. 2.25 (0.090) ................................ ................ 12 20 (3/4) ................................ ............. 3.75 (0.150) ................................................ 12 25 (1) ................................ .............. 3.95 (0.158) ................................................ 12 * As measured at any point on the cross section Plastic pipe for drip lines shall also contain a proven effective, algae resistant ingredient. Furnish certification to the effectiveness of the algae resistant ingr edient upon request. Acceptable certification shall be the results of either:
1.Field test for at least 2 years under actual operating conditions or
2.Laboratory testing which closely approximates the full range of climatic conditions that would exist during any full calendar year, including exposure to algae under warm climatic conditions for a duration of 30 days. Provide PVC plastic pipe which is hom ogeneous throughout, smooth inside and outside, free from cracks, holes, foreign materials, dents, wrinkles, and blisters.
726.03 15 Sleeves and Conduit for Irrigation Systems. Sleeves shall be PVC pipe conforming to ASTM
D1785, SDR35. Water line sleeves shall be white Schedule 40 PVC pipe. Wiring conduit shall be gray Schedule 40 PVC pipe.
726.03.16 Masonry. Hollow load- bearing concrete masonry blocks shall conform to ASTM C90. Hollow
non-load- bearing concrete masonry blocks shall conform to ASTM C129.
726.03.17 Soil Stabilizer. Soil stabilizer shall be as specified in the contract documents. Use soil stabilizers
listed in the QPL. SECTION 728 EPOXY SCOPE
728.01.01 Materials Covered. This specification covers the type and quality of epoxy materials.
REQUIREMENTS
728.02.01 Sampling and Testing. Do not use epoxy before sampling and testing unless its use is permitted
according to Subsection 106.05. All tests will be conducted according to the test methods of the ASTM, Federal Test Method Standard No. 141, and methods in use by the Department.
728.02.02 Certificates. Furnish 2 certificates from the manufacturer covering each order of material, certifying
that the product complies with the specifications. Deliver certificates at the time of, or before, delivery of the order.
728.02.03 Packaging, Labeling , and Storing. Package each component in steel containers not larger
than 20 L (5 gal) in volume. When the components are to be mixed at a ratio of 2 parts A to 1 part B, by volume, the container containing component B shall be one- half the volume of the container containing component A. Provide new containers with lug type crimp li ds with ring seals, not less than 0.64 mm (0.025 in.), meeting United States Department of Transportation Hazardous Materials Shipping Regulations, and well sealed to prevent leakage. If a lining is used in the containers, make it of such character as to resist any action by the components. Clearly label each container with the designation (Component A or B), type (standard or rapid), if applicable, manufacturer’s name, date of manufacture, batch number (a batch shall consist of a single charge of all components in a mixing chamber), all directions for use. Do not use any material which shows evidence of crystallization or a permanent increase in viscosity or settling of pigments which cannot be readily redispersed with a paddle.
728.02.04 Directions fo r Use. Mix when components A and B are at a temperature between 16 and 29 °C
(60 and 85 ° F), unless otherwise specified. Perform any heating of the adhesive components by application of indirect heat. Immediately before mixing, thoroughly mix each component with a paddle. Use separate paddles to stir each component. Immediately before use, thoroughly mix the 2 components together in the specified ratios. When mixed, all adhesives shall have a uniform gray color without black or white streaks. Do not add sol vent to any epoxy. After mixing, place epoxies in the work and also place any overlaying or inserted material which is to be bonded to the work by the epoxy before thickening of the epoxy has begun. Place epoxy on surfaces free of rust, paint, grease, asphalt, and loose and deleterious material. When epoxy is used as a binder to make epoxy concrete or mortar, thoroughly mix the 2 components of epoxy together before the aggregate is added. Unless otherwise specified, the mix proportions shall consist of 1 part of binder to approximately 4 parts of aggregate, by volume. Use clean aggregate with a moisture content of not more than 0.5% when tested by Test Method No. Nev. T112. Prime surfaces against which epoxy concrete and mortar are to be placed with a coat of the epoxy just before placing the mortar. TYPES OF EPOXIES
728.03.01 Binder (Adhesive), Epoxy Resin Base. This specification covers a 2 component, low viscosity,
resin base epoxy designed primarily for use as a binder in making epoxy concretes or epoxy mortars, and in pressure grouting of cracks in concrete. The epoxy shall conform to AASHTO M235, Type III, Grade 1, Class A, B, or C.
Source: Nevada Standard Specifications for Road and Bridge Construction, 2014 Edition. Pages 581–586 of 610.