CONSTRUCTION SPECIAL SPECIFICATION

SECTION 02935-S

[SEEDING -- NATIVE GRASS]{.underline}

[Page]{.underline}

[PART 1 - GENERAL 2](#part-1---general)

[1.01 DESCRIPTION OF WORK 2](#description-of-work)

[1.02 REFERENCES 2](#references)

[1.03 SUBMITTALS 2](#submittals)

[1.04 QUALITY ASSURANCE 3](#quality-assurance)

[1.05 DELIVERY, STORAGE AND HANDLING 4](#delivery-storage-and-handling)

[1.06 JOB CONDITIONS 4](#job-conditions)

[1.07 PROTECTION OF SEEDED AREAS 4](#protection-of-seeded-areas)

[1.08 PLANTING SEASON 4](#planting-season)

[PART 2 - PRODUCTS 5](#part-2---products)

[2.01 MANUFACTURER'S 5](#manufacturers)

[2.02 SEED MATERIALS 5](#seed-materials)

[2.03 TOPSOIL 6](#topsoil)

[2.04 FERTILIZERS 6](#fertilizers)

[2.05 ENZYMATIC AGENT: 6](#enzymatic-agent)

[2.06 MULCH 7](#mulch)

[2.07 STRAW MULCH 7](#straw-mulch)

[2.08 BINDER 7](#binder)

[2.09 ORGANIC AMENDMENT 8](#organic-amendment)

[2.10 WATER 8](#water)

[2.11 TEMPORARY IRRIGATION SYSTEM 8](#temporary-irrigation-system)

[PART 3 - EXECUTION 8](#part-3---execution)

[3.01 EXAMINATION 8](#examination)

[3.02 SOIL PREPARATION 8](#soil-preparation)

[3.03 FERTILIZATION AND ENZYME APPLICATION
10](#fertilization-and-enzyme-application)

[3.04 SEED APPLICATION 10](#seed-application)

[3.05 HYDROMULCHING/TACKIFIER 11](#hydromulchingtackifier)

[3.06 STRAW MULCH 11](#straw-mulch-1)

[3.07 WATERING 12](#watering)

[3.08 ESTABLISHMENT OF TURF AND MAINTENANCE
12](#establishment-of-turf-and-maintenance)

[3.09 INSPECTION 13](#inspection)

[3.10 FINAL ACCEPTANCE 14](#final-acceptance)

[3.11 GUARANTEE 14](#guarantee)

CONSTRUCTION SPECIAL SPECIFICATION

SECTION 2935-S

[SEEDING -- NATIVE GRASS]{.underline}

## [PART 1 - GENERAL]{.underline}  {#part-1---general .SECTION1.01 .unnumbered}

## DESCRIPTION OF WORK  {#description-of-work .SECTION1.01}

A.  Sustainable site design promotes the use of native, well-adapted
    grass species that stabilize and bind the soil. This reduces
    maintenance and requires modest irrigation after initial
    establishment of a healthy stand of grass. Maintenance is reduced
    and due to its low-growing habit frequent mowing isn't necessary.

B.  Conservation and protection of the natural resources at the site are
    important. Any disturbance of natural resources occurring during
    planting operations should be kept to a minimum.

C.  All native grass seed shall be certified by state of origin. The
    certification authority for the state of New Mexico is the New
    Mexico Crop Improvement Association \[505.646.4125\]. Seeding
    establishment and maintenance of native grass and wildflower.

D.  Furnish all labor, materials, and equipment necessary for
    preparation of seedbed, installation and establishment of seed,
    mulch, wildflower, and related work specified herein.

## REFERENCES {#references .SECTION1.01}

A.  The publications listed below form a part of this specification to
    the extent referenced. The publications are referred to in the text
    by basic designation only.

    U.S. DEPARTMENT OF AGRICULTURE (USDA) AMS SEED ACT (1995) Federal.
    See Act Regulations Part 201

    AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)

    ASTM D 4972 (1995a) pH of Soils

    ASTM D 5268 (1992; R 1996) Topsoil used for Landscaping Purposes.

## SUBMITTALS  {#submittals .SECTION1.01}

B.  Submit in accordance with the requirements of Section 01300:

    1.  Certification of Landscape Work

        a.  Certificates of inspection and manufacturer\'s or vendor\'s
            certified analysis for soil amendments, mulch blankets,
            fertilizer, and tackifier materials.

        b.  Vendor's certification for each seed mixture required,
            stating botanical and common name, percentages or purity,
            germination, and weed seed percentages for each seed specie.
            Seed bag tag and weights per bag with copies of invoices.

        c.  Proposed source of all native grass and shrub seed
            \[wildflower\], which shall indicate the location from which
            the seed was harvested.

            B. Planting Schedule, Landscape Work: Proposed
            planting/seeding schedule showing scheduled dates for each
            type of planting in each area of the site. Coordinate with
            specified maintenance periods to provide maintenance from
            date of final acceptance. Once the schedule is accepted,
            revise dates only with the SDR's approval after
            documentation of delays.

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C.  Maintenance Instructions, Landscape Work: Instructions shall be
    submitted recommending procedures for the maintenance of seeding
    work for one full year. These instructions are provided as a
    guideline only to assist Sandia in establishing a maintenance
    program.

## QUALITY ASSURANCE {#quality-assurance .SECTION1.01}

> A. General

1\. Landscape Contractor: A single licensed firm specializing in all
aspects of landscape work and has a minimum of 5 years of experience in
performing seeding as specified.

1.  Provide seed mixture in containers showing percentage of seed mix,
    year of production, net weight, date of packaging, and location of
    packaging. Containers shall be shipped with certificates of
    inspection as required by governmental authorities.

2.  Furnish seed label in accordance with the requirements of the
    Federal and New Mexico statutes and regulations governing seed
    labeling: such resulting requirements include but are not limited
    to: Federal Seed Act and Amendments, rules and regulations
    established by the US Department of Agriculture, the New Mexico Seed
    Law, and all resulting regulations or restrictions established by
    the New Mexico State University or other authorized entity.

3.  Ensure the seed mix and its application complies with the
    requirements of all other Federal and New Mexico statutes and
    regulations governing seeds, plants, and weeds: these requirements
    include but are not limited to: the Noxious Weed Control Act and all
    rules, regulations, or control measures.

4.  Do not make substitutions for specified materials. If specified
    material is not available, submit proposal for use of substitute
    material.

    B. Analysis and Standards:

    1\. Standard products shall be packed with manufacturer\'s certified
    analysis.

    2\. For other materials, an analysis shall be performed by a
    recognized laboratory in accordance with methods established,
    wherever applicable or as further specified.

## DELIVERY, STORAGE AND HANDLING {#delivery-storage-and-handling .SECTION1.01}

A. Packaged Materials: Packaged materials shall be delivered in sealed
containers showing the weight, analysis and name of manufacturer.
Materials shall be protected from deterioration during delivery, and
while stored at the site.

## JOB CONDITIONS {#job-conditions .SECTION1.01}

A. Seeding shall not be performed until finish grading, and structures
in or adjacent to areas to be planted have been installed, and approved.

B. Work within seasonal limitations for various seed species. Refer to
Section 3.04A.

C. When detrimental conditions are encountered, notify the Sandia
Delegated Representative before proceeding.

## PROTECTION OF SEEDED AREAS {#protection-of-seeded-areas .SECTION1.01}

A. Seeded areas shall be protected from damage, disturbance, or
construction activity after planting operations are complete.

B.  Damage resulting from construction activities, erosion, gullies,
    washouts, or other causes shall be repaired by filling with topsoil,
    tamping, refertilizing, and reseeding by the Contractor at his
    expense, if such damage occurs prior to acceptance of the project.

C.  Protection and Maintenance of Native Seed in Irrigated Areas: For
    areas where temporary irrigation is provided, protect and maintain
    native seed areas until uniform germination and growth is
    established. At that time, the area will be accepted by the SDR if
    no void or bare areas greater than 25 square inches occur within the
    seeded area. If these standards are not met the area shall be
    reseeded and maintained until final acceptance. Remove tumbleweed,
    Russian Thistle and other nuisance, non-grassy weeds during the
    maintenance period.

## PLANTING SEASON {#planting-season .SECTION1.01}

A. Native Grass Seed Mixture in Non-Irrigated Areas: Planting shall be
done when conditions are favorable or as approved by the SDR. Refer to
Section 3.04.A.

B. Native Grass and Wildflower Seed Mixture in Non-Irrigated Areas:
Planting shall be done when conditions are favorable or as approved by
the SDR. Refer to Section 3.04.A.

## [PART 2 - PRODUCTS]{.underline}  {#part-2---products .SECTION1.01 .unnumbered}

## 2.01 MANUFACTURER'S {#manufacturers .SECTION1.01 .unnumbered}

A. Native Grass and Wild Flowers -- Plants of the Southwest (505)
344-8830, or approved equal.

B. Natural Fertilizer and Soil Conditioner -- Soil Food Inc., (505)
983-8075, or approved equal.

C. Binder -- Plants of the Southwest, (505) 344-8830, or approved equal.

## 2.02 SEED MATERIALS {#seed-materials .SECTION1.01 .unnumbered}

A. Seed shall be fresh, clean, new-crop seed complying with the
tolerance for purity and germination established by the Official Seed
Analysts of North America.

1\. Native Grass and Wildflower Seed: High Desert Mix and Summer Green
Lawn Blend.

2.  Native Grass Seed: Mixture shall be composed of a 50/50 mix of
    Buffalo Grass and Blue Grama

3.  Contractor shall furnish certification showing origin of all seed
    and pure live seed (PLS) purity times percent germination. Each bag
    of seed shall be tagged and sealed by the seed dealer in accordance
    with the State Department of Agriculture or other local
    certification authority within the state of origin. The label shall
    indicate analysis of seed and date of analysis, which shall not be
    more than 9 months prior to delivery date. Seed may be premixed by
    the seed dealer and appropriate data indicated on the bag label for
    each variety. Refer to 2.02.D for seed mixture and rate of
    application.

    B. Seed shall be domestic grown and shall be furnished in sealed
    standard containers, each of which carries the analysis label.

    C. Seed, which has become wet, musty or otherwise damaged in transit
    or storage will not be acceptable.

    D. The seeding rate of each seed type shall be as follows:

    1.  Wildflower Seed -- High Desert Mix: 2 lbs. Per 6,400 sf.

    2.  Summer Green Lawn Blend -- Blue Grama and Buffalo Grass: 2 lbs.
        Per 1,000 sf.

    3.  Buffalo Grass: 4 lbs. Per 1,000 sf.

## 2.03 TOPSOIL {#topsoil .SECTION1.01 .unnumbered}

A. Topsoil shall be as defined in ASTM D 5268.

B.  Suitable topsoil includes selectively excavated material that is
    representative of soils in the local vicinity that produces growths
    of grass or other vegetation and is reasonably free from underlying
    subsoil, clay lumps, objectionable weeds, litter, brush, matted
    roots, toxic substances or any material that might be harmful to
    plant growth or be a hindrance to grading, planting or maintenance
    operations.

C.  Topsoil shall not contain more than five (5) percent by volume of
    stones, stumps, or other objects larger than one inch in any
    diameter.

D.  Imported topsoil shall comply with the following:

    1\. Composition (by volume)

    a.  Organic material -- minimum of 2%.

    b.  Silt -- minimum of 15%.

    c.  Sand -- 15 to 50%.

    d.  Clay -- 15 to 35%.

    e.  Foreign Materials -- maximum of 1.0%.

E.  Soil pH shall be suitable for seed specified and be tested in
    accordance with ASTM D 4972.

F.  Transport imported topsoil directly from the source to final
    position unless approved by the Sandia Delegated Representative to
    be place in stockpiles. If amendments are required, mix in an
    approved manner prior to placing on site. If stockpiling is
    approved, the locations and amount of the stockpiles will be
    designated by the SDR.

## FERTILIZERS {#fertilizers .SECTION1.01}

A.  Fertilize native grass and wildflower areas after establishment when
    actively growing with a natural fertilizer/Soil Conditioner
    manufactured by Soil Food Inc., or approved equal.

## ENZYMATIC AGENT: {#enzymatic-agent .SECTION1.01}

BioMax or SuperBio, as available from Organic Technology Inc., (505)
291-1100, or an approved equivalent enzymatic agent. Apply BioMax or
SuperBio at a rate of 5 gallons per acre, diluted with 10 gallons or
more of water.

## MULCH {#mulch .SECTION1.01}

A. Straw for vegetative mulch shall be harvested stalks of oats, wheat,
barley or rye.

B. 65 percent of mulch by weight shall be 10 inches long or longer.

C. Provide mulch material consisting of virgin wood fibers manufactured
expressly from whole wood chips. Process the chips in such a manner as
to contain no growth or germination inhibiting factors. Do not produce
fiber from recycled material such as sawdust, paper, cardboard, or
residue from pulp and paper plants. Mulch shall be free of noxious weed
seed.

D.  Hydromulch: Excel Fibermulch with binder as manufactured by American
    Excelsior Co.; 850 Avenue H East, P.O. Box 5067, Arlington, Texas,
    76001, (817) 640-1555, local phone (505) 345-7806, or an approved
    equivalent mulch with binder.

E.  Combine mulch with a colloidal polysaccharide tackifier that has no
    growth or germination inhibiting factors and is nontoxic. Apply the
    uniform mixture to the seeded area.

F.  Tackifier: Exact-Tak tackifier as manufactured by American Excelsior
    Co.; 850 Avenue H East, P.O. Box 5067, Arlington, Texas,
    76001, (817) 640-1555, local phone (505) 345-7806, or an approved
    equivalent tackifier for straw or hay mulch.

G.  Substitutions are allowed only under provisions of Section 1330,
    Submittal Procedures.

## STRAW MULCH {#straw-mulch .SECTION1.01}

A. Provide straw mulch that is perennial native or introduced grasses of
fine stemmed varieties. At least 65 percent of the herbage by weight of
each bale of straw must be 10-inches in length or longer. Hay with
noxious seeds or plants will not be accepted. Rotted, brittle or molded
hay will not be accepted. Marsh grass or prairie hay composed of native
grass species to be seeded is acceptable. Tall wheat grass, intermediate
wheat grass, switch grass or orchard hay are acceptable if cut prior to
seed formation. Provide marsh grass composed of mid to tall native
grasses (usually tough and wiry grass and grass-like plants found in the
lowland areas within the Rocky Mountain Region).

## BINDER {#binder .SECTION1.01}

A.  A natural glue made form plant material that holds seed and mulch in
    place. Rate: 2 lbs. Per 1,000 sf.

## ORGANIC AMENDMENT {#organic-amendment .SECTION1.01}

OMNI as available from Western Organic Inc., (505) 877-8670. Apply at a
rate of 2-inch loose depth.

> New Mexico Compost: New Mexico Compost Products
>
> Soilutions
>
> Compost Site: 9008 Bates Road, SE
>
> Albuquerque, New Mexico 87105
>
> \(505\) 877-0220

Apply at a rate of 1-inch loose depth.

## WATER {#water .SECTION1.01}

A. Contractor shall provide suitable quality water to establish and
maintain a vigorous growth of grass.

## TEMPORARY IRRIGATION SYSTEM {#temporary-irrigation-system .SECTION1.01}

A.  The Contractor will provide a temporary irrigation system to
    establish a healthy stand of grass.

## [PART 3 - EXECUTION]{.underline} {#part-3---execution .SECTION1.01 .unnumbered}

## 3.01 EXAMINATION {#examination .SECTION1.01 .unnumbered}

A. Examine subgrade, verify elevations, as shown on drawings, repair
deficiencies in need of correction.

B. Notify the SDR of finished rough grading for approval before placing
topsoil. Acceptability of the grades shall be determined by the SDR
prior to seedbed preparation.

## SOIL PREPARATION {#soil-preparation .SECTION1.01}

A. Seeded Areas:

1\. Undisturbed Topsoil:

a\. Prior to loosening topsoil, remove undesired vegetation and clear
ground surface of all other materials that would hinder proper grading
or tillage.

b\. Loosen topsoil of seeded areas to a minimum depth of 4 - 6 inches.
Uproot all competitive vegetation and work soil to a uniform surface
free of clods and large stones 2-inches and larger in any dimension.

c\. Drag to a smooth even surface. Rake all areas to remove sticks and
debris or other foreign matter that would interfere with seeding
equipment. Grade to form all swales, pitch to catch basins streets,
curbs, etc. to insure proper surface drainage.

d.  Remove high areas and fill in depressions. Till soil to a homogenous
    mixture of the fine texture. Meet finished grades. Till in organic
    amendment into the top 6\" of the soil.

e.  Tilling must be performed across the slope when practical and shall
    be performed in two directions whenever one is insufficient to
    adequately break up the soil. Tilling shall not occur when the wind
    is over 10 mph and is causing a dust problem to adjoining areas.

f.  Limit fine grading to areas, which can be promptly planted within a
    24-hour period.

g.  Seedbeds should be permitted to settle or should be firmed by
    rolling before seeding is made.

h.  Prior to seeding, water all areas thoroughly for 4 weeks to the
    point of saturation to produce weed growth. Water at the rate of 2
    cycles/day. Apply \"Roundup\" herbicide to kill all growth, and
    proceed with seed installation after period recommended by herbicide
    manufacturer.

i.  Do not work when the moisture content of the soil is unfavorable or
    the ground is otherwise in a non-tillable condition.

j.  Do not till grounds that is already loose to a depth of 2-inches or
    more that has undergone regarding and fill. Till newly cut slopes.

k.  Repair any piping damaged during disking or seeding operations.

    2\. Replace or New Topsoil:

    a\. Prior to replacing topsoil, scarify subsoil to a minimum depth
    of 6 inches. Soil clumps or clods shall not be larger than 3 inches
    in diameter. Remove all rocks larger than 1-1/2 inch diameter in
    size.

    b\. Spread topsoil to a minimum depth of 4 inches.

    c\. Drag to a smooth even surface. Grade to insure proper drainage.

    d\. Grade lawn areas to a smooth, even surface with loose uniform
    texture.

    e\. Limit fine grading to areas to be promptly planted.

    a.  Seedbeds should be permitted to settle or should be firmed by
        rolling before seeding.

## FERTILIZATION AND ENZYME APPLICATION {#fertilization-and-enzyme-application .SECTION1.01}

A.  Apply fertilizer and enzymatic treatment of the type, formulation,
    and rate of application as designated uniformly to the prepared
    seedbed. Delay application of fertilizer if seeding will not follow
    within a day.

B.  Prepare the seedbed again if the SDR determines that rain or some
    other factor has affected the prepared surfaces and may prevent
    seeding to the proper depth.

##  SEED APPLICATION {#seed-application .SECTION1.01}

A.  Seeding shall be accomplished only between May 15^th^ and September
    15^th^ unless specific permission in writing is issued by the SDR to
    allow seeding before or after these dates.

B.  Do not seed during windy weather, or when the topsoil is dry,
    saturated or frozen.

C.  Lightly roll surfaces and reshape to level humps and hollows. Secure
    the SDR's approval before seeding.

D.  Seed Application: Use approved seeder, distributing seed evenly over
    the entire area. Rice hulls and other fillers shall be used to
    prevent uneven separation of lighter seed.

    1\. Native Grass and Wildflower Area:

    a\. Wildflower seed -- High Desert Mix: 2 lbs. Per 6,400 sf area.

    b\. Native Grass Area: Summer Green Lawn Blend -- Blue Grama and
    Buffalo Grass: 2 lbs. Per 1,000 sf.

    1.  Native Grass Area: Buffalo Grass: 2 lbs. Per 1,000 sf.

E.  Immediately following the seeding operation, the seedbed shall be
    lightly raked or chained to provide approximately ½-inch cover of
    soil over most of the seeds.

F.  Wet seeded areas slowly but thoroughly, and keep moist but not
    saturated at all times until the grass is up.

G.  Protect turf areas by erecting fences, barriers, and signs necessary
    to prevent trespass.

H.  Drill Seeding:

    1.  Refer to Contract Drawings for seed mix and rate. Uniformly
        apply the prescribed mix and rate over the area to be seeded as
        follows:

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    a.  Accomplish seeding operations, where practical, by drilling in a
        direction across the slope. Plant seed approximately 1/2 -- inch
        deep. The distance between the drilled furrows must not exceed 4
        -- inches. If the furrow openers on the drill exceed 4 --
        inches, drill the area twice to obtain a 4 -- inch distance
        between furrows. Seed with grass wheels, rate control
        attachment, seed boxes with agitators for trashy seed and
        separated boxes for small seed.

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A.  Broadcast Seeding:

    1.  Where indicated on the Contract Drawings, or where it is not
        practical to accomplish seeding by drilling, mechanically
        broadcast the seed by use of hydro-mulch slurry blower or a
        rotary spreader or a seeder box with a gear feed mechanism. If
        seeding is done with a slurry blower, use the highest pressure
        and smallest nozzle opening, which will accommodate the seed.

    2.  Immediately following the seeding operation, lightly rake the
        seedbed or loosen with a chain harrow to provide approximately
        1/2-inch of soil cover over most of the seed.

## HYDROMULCHING/TACKIFIER {#hydromulchingtackifier .SECTION1.01}

A.  Immediately following the raking/chaining operation, apply
    hydro-mulch fibers with tackifier to seeded areas at the rate
    specified by the manufacturer. Mix slurry in a tank with an agitator
    system and spray, under pressure, uniformly over seeded areas.

B.  Use both vertical and horizontal movements in the applicator to
    achieve an even application of the slurry material. Keep all
    materials in uniform suspension throughout the mixing and suspension
    cycle when using hydraulic mulching equipment.

## STRAW MULCH {#straw-mulch-1 .SECTION1.01}

A. Immediately following the raking/chaining operation, add straw mulch
to the seeded areas.

B.  Apply straw mulch at a minimum of 1.5 tons per acre of air dry
    material. Spread the straw mulch uniformly over the area either by
    hand or with a mechanical mulch spreader. When spread by hand, tear
    the bales of straw apart and fluff before spreading. Do not mulch
    when velocity exceeds 10 mph.

C.  Wherever the use of crimping equipment is practical, place mulch in
    the manner noted above by anchoring it into the soil. Use a heavy
    disc such as a mulch tiller, with flat serrated disc at least 1/4 --
    inch in thickness, having dull edges, and space no more than 9 --
    inches apart to anchor the mulch into the soil, with discs of
    sufficient diameter to prevent the frame of the equipment form
    dragging the mulch. Anchor mulch a minimum depth of 2 -- inches and
    across the slope where practical with no more than two passes of the
    anchoring equipment.

D.  If mulch areas cannot be anchored by crimping, provide hydro-mulch
    wood fibers with tackifier at the rate of 500 lbs. per acre. Mix
    slurry in a tank with an agitator system and spray, under pressure,
    uniformly over seeded areas. Keep all materials in uniform
    suspension throughout the mixing and suspension cycle when using
    hydraulic mulching equipment. Mix 400 lbs. Of wood fiber with 100
    lbs. of tackifier.

E.  Keep all materials in uniform suspension throughout the mixing and
    suspension cycle when using hydraulic mulching equipment.

## WATERING {#watering .SECTION1.01}

A. Where irrigation watering is specified for seeded areas, watering of
the seed will be the responsibility of the contractor. Immediately upon
completion of the mulching and binding operation, the seeded areas shall
be watered, keeping the top 2 -- inches of soil evenly moist until seed
has uniformly germinated and grown to a height of 2 - inches.

B. If a temporary sprinkler system is used, keep all pipe connections
tight to avoid leakage and loss of water, and to prevent washing of
erosion of growing areas. Maintain sprinklers in proper working order
during watering.

C. Watering application shall be done in a manner which will provide
uniform coverage but which will not cause erosion, movement or damage to
the finished surface.

## ESTABLISHMENT OF TURF AND MAINTENANCE {#establishment-of-turf-and-maintenance .SECTION1.01}

A. General Maintenance:

1\. The Contractor shall maintain the seeded areas for not less than 60
days or until the final acceptance of the entire project.

2\. Turf establishment maintenance shall follow immediately, coincide
with, and be continuous with the planting operation and after all
planting is complete and accepted, or longer where necessary to
establish acceptable stands of turf.

1.  If required, maintain native grass seeded areas by watering
    operations with a temporary sprinkler system to maintain moisture in
    ground at least within two inches of surface. Continue watering
    until grass stand is established to a minimum 2-inch height or for a
    minimum of 6 weeks.

2.  Protect all areas against damage, including erosion and trespass,
    and provide proper safeguards. Maintain and keep all temporary
    barriers erected to prevent trespass.

3.  Keep all walks and paved areas clean. Keep the site clear of debris
    resulting from landscape work or maintenance.

4.  Repair all damaged seeded areas, and re-seed immediately upon
    discovery of damage or loss.

5.  Check all barriers and temporary fencing daily, and repair or
    replace immediately as needed.

6.  Keep native grass areas free of weeds until final acceptance by SDR.

    B. Watering

    1\. Check temporary sprinkler system at each watering; adjust
    coverage to allow proper distribution.

    2\. Newly planted areas shall be watered frequently to promote seed
    germination. Adjust sprinkler to prevent erosion or flooding.

    3\. As turf develops, the frequency of watering shall be reduced.

    C. Mowing

    1\. Buffalo grass is very low growing, frequent mowing is not
    necessary. It is recommended to mow twice a year so that runners do
    not pile up on the surface.

    2\. Do not mow native grass and wildflower area.

    D. Weed Control:

    1\. Weed control shall be applied as necessary to minimize weed
    establishment. Apply a broadleaf herbicide according to
    manufacturer\'s recommendations, cognizant of environmental and
    weather conditions. Only use on buffalo grass area. Do not use on
    native grass and wildflower area.

    2\. Weed control shall not be applied without prior written notice
    as to the quantity and area to be covered. Weed control to be used
    shall be stored on the site and not used until it is inspected and
    approved by the SDR as to its conformance to quality requirements.
    Any weed control applied without prior knowledge or observation by
    the SDR will be at Contractor\'s expense and considered as
    [not]{.underline} applied.

    E. Fertilizing

    1\. Fertilize with a natural fertilizer after establishment and when
    actively growing.

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1.  Fertilizer shall not be applied without prior written notice as to
    the quantity and area to be covered. Fertilizer to be used shall be
    stored on the site and not used until it is inspected and approved
    by the SDR as to its conformance to quality requirements. Any
    fertilizer applied without prior knowledge or observation by the SDR
    will be at Contractor\'s expense and considered as [not]{.underline}
    applied.

## INSPECTION {#inspection .SECTION1.01}

A.  The following inspection shall be the minimum required inspections
    to native grass after or during the course of construction.
    Additional inspections shall be made at any time at the discretion
    of the SDR.

B.  Notify the SDR in writing 48 hours in advance of each required
    inspection.

C.  The sequence of required inspections shall not be changed from the
    sequence listed below. Do not proceed with work of the next sequence
    without written approval of the work of the previous sequence.

    1.  Automatic irrigation system where required shall be installed,
        tested, and approved.

    2.  Each phase of soil preparation shall be inspected in process.

    3.  Finish grade shall be inspected.

    4.  Seed shall be inspected prior to seeding.

    5.  Seeding operations shall be monitored.

    6.  Seeded areas shall be inspected after completion.

    7.  Seeded areas shall be inspected at the end of the maintenance
        period.

## FINAL ACCEPTANCE {#final-acceptance .SECTION1.01}

A.  The Contractor shall maintain the seeded areas after seed
    installation until the final acceptance of the entire project and an
    establishment of an even, thick, vigorous strand of grass with no
    bare spots in seeded areas larger than 4-inch diameter.

B.  In the event that all other work required by the Contractor is
    completed before an acceptable grass cover is achieved or because of
    seasonal limitations, partial acceptance of the work will be made
    with final acceptance delayed until a satisfactory grass growth has
    been established.

C.  Final review for acceptance shall be made at the conclusion of the
    planting establishment period. On such date, all project
    improvements and all corrective work shall have been completed.

D.  Written notice requesting review shall be submitted at least 10 days
    before the anticipated date.

E.  Prior to being considered ready for review, the Contractor shall
    have done a final weeding, and the job cleared of all debris.

## GUARANTEE {#guarantee .SECTION1.01}

A.  Guarantee all turf, native grass, and wildflowers to be in a healthy
    thriving condition until the end of the maintenance period. The
    Contractor shall replace without cost to Sandia all seeded areas not
    acceptable. Sandia will assume all maintenance responsibility upon
    the date final approval is given to the Contractor.

END OF SECTION