329200_LAWN_CAR2015_2_BID_revised_2014_06_23.pdf

Confident

JEFF - 18

031814

SECTION

PART 1

1.1 SU

A. T

1.2 R

A. T

1.3 D

A. V be W “S

1.4 A

A. S tial and Propr

81202

N 32 92 00 - L

GENERAL

UMMARY

The work of th

. Review

. Cover

. Remov

. Seedin

. Soddin

. Coord

. Testin

. Clean-

. Restor of the

RELATED SE

The following Specification

. Sectio

. Sectio

. Sectio

CONT

. Sectio

DEFINITIONS

Vegetation and e protected an

Work. Restrict Site Preparati

ACTION SUB

eed Mix Info rietary Inform

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ECTIONS

items of relat ns:

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TRACT)

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BMITTALS

rmation mation cludes, but is ns and materi crop and exist other trades.

areas to rema ted work are

Site Preparatio

Planting and F

“Liquid Biol

Planting Soil tion Zone (VS aspects of the Contractor’s a and Clearing.

not limited to ials affecting ting lawn.

ain within the specified and on, Salvage a

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lawns.

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” for fine grad ndment” for tallation”.

a in which exi dition are to b n the VSPZ ar k that are dist other Section

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LBA and C isting soil and be become a p re defined in S

Contra

32 92 00-1

LAWN

turbed by the ns of the ection.

de stakes.

ompost. (NO d vegetation a part of the fin Section 31 10 act #2 work

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are to nished 0 00

Confidential and Proprietary Information Contract #2

JEFF - 181202 32 92 00-2

031814 LAWN

B. Product Data: Provide for each element of construction listed.

1. Cover crop seed, each type.

2. Lawn seed.

3. Sod.

C. Samples: Provide for each element of construction listed.

1. Cover Crop Seed, each type: one-half pint bags of seed mix with seed mix label.

2. Lawn Seed: one-half pint bags of seed mix with seed mix label.

3. Sod: (2) 12” x 12” pieces.

1.5 INFORMATIONAL SUBMITTALS

A. Qualification Data: In addition to requirements of Section 01 33 23 “Submittal Procedures,” provide suppliers and installer’s years of experience, and a minimum of three project references.

1. The Contracting Officer shall have the right to reject any seed or sod supplier if he/ she determines, before, during or after inspecting or receipt of seed or sod, any of the following:

a. The seed or sod supplier’s cultural practices or maintenance procedures do not meet specified standards.

B. Material Certificate: Provide for each element of construction listed:

1. Cover crop seed, each type.

2. Lawn seed.

3. Sod.

C. Installer Certificates: In addition to requirements of Section 01 33 23 “Submittal Procedures,” submit for the seeding methods, including equipment to be used.

D. Material Test Reports:

1. Seed: In addition to the requirements in Section 01 33 23 “Submittal Procedures”, indicate pure seed percentage by weight and species composition for samples taken of seed mix and cover crop.

1.6 QUALITY ASSURANCE

A. Installer Qualifications: In addition to the requirements of Section 01 40 00 “Quality Requirements,” a qualified landscape installer whose work has resulted in successful establishment of turf on at least three projects of similar size and complexity. Minimum Experience for Foreman and Installer shall be five years.

B. Pre-installation Conference: A pre-installation conference with the Contracting Officer is required for the work of this section.

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C. Inspection: Inspection of turfgrass sod by the Contracting Officer may be made at the growing site at any time, but such inspection will not preclude rejection after delivery to the job site for sod that exhibits dry base soil, bald patches greater than ½” diameter, infestation, abnormal color, abnormal blading or disease. Any turfgrass sod so rejected shall be removed from the site immediately and replaced with acceptable turfgrass sod. Inspection of turfgrass sod shall include conformity to quantity, specified nomenclature, and health requirements.

1. The Contracting Officer shall have the right to reject any seed or sod materials if he/ she determines, before, during or after inspecting or receipt of seed or sod, any of the following:

a. The seed or sod does not meet quality standards set forth herein.

b. The seed or sod supplier cannot supply the specified seed or an acceptable substitute species.

1.7 DELIVERY, STORAGE AND HANDLING

A. In addition to the requirements of Section 01 67 00 “Product Requirements”, provide the following:

1. General:

a. Deliver materials only after preparation for seeding or sodding have been completed and accepted, including but not limited to: subdrainage system, irrigation, rough grading, utilities, decompaction or remediation of soils.

b. Prohibit vehicular and pedestrian traffic on or around areas to be seeded or sodded.

2. Seed:

a. Seed shall be stored at temperatures between 40 and 60 degrees F and with a relative humidity of between 25-60%.

b. Seed that has become wet or moldy shall not be accepted.

c. Transport: Temperature shall not exceed 105 F at any time. If transit from cold storage to sowing is greater than 10 days, seed must be kept under storage temperatures and relative humidity described above.

3. Sod:

a. Sod shall be closely monitored for sufficient root moisture and shall be protected from sun and wind. Stored sod shall be watered and misted several times a day if necessary to maintain proper root moisture and to reduce transpiration in sunny and windy locations. Sod shall not be stored more than twenty-four hours without written acceptance by the Contracting Officer.

1) Sod stored longer than 24 hours shall be rejected and promptly removed from the site.

1.8 PROJECT CONDITIONS AND COORDINATION

A. Planting, irrigation and hardscape work will be underway during turf installation. The Contractor shall take care to avoid damaging any adjacent work. Should damage occur, the Contractor shall repair elements to the Contracting Officer’s satisfaction.

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B. Sequence of Installation: Sequence installation so that trees and shrubs are installed before lawns, unless otherwise approved by the Contracting Officer. Protect installed lawns and plants and restore any disturbed areas. Complete seeding and sodding work as quickly as possible on portions of the site as they become available.

1. Coordinate installation of seeded and sodded areas with installation of planting soils and plants. Refer to Section 32 91 19 “Planting Soil System - Installation,” and Section 32 93 00 “Planting and Fine Grading.”

C. Verify that irrigation work is installed and available, or an adequate potable watering supply is available for watering at time of installation. If water service is discontinued, for any reason, before final acceptance, provide water as needed to maintain seeded areas in a healthy condition. Provide all equipment and manpower required for watering.

1.9 PLANTING SEASONS

1. General: Planting season for cover crop, lawn seed and sod shall be as described below.

The actual planting of the seed, however, shall be done only during periods within this season that are normal for such work as determined by weather conditions and by accepted practice in this locality. At his option and on his responsibility, the Contractor may plant seed under unseasonable conditions without compensation but subject to the Contracting Officer’s approval as to time and methods:

2. Planting Seasons:

a. Cover Crop Seed (Radish): July 14 – Aug 28

b. Cover Crop Seed (Annual Rye): Sept 1 to Sept 30

c. Lawn Seed: 15 March to April 21 (Spring) & 1 Sept. to 21 October (Fall)

d. Sod: 15 March April to 15 June (Spring) & 15 Sept. to 15 November (Fall)

1.10 TESTING

A. General:

1. Soil testing at areas exhibiting unsatisfactory growth of cover crop, lawn seed or sod shall be required for diagnostic purposes. Contractor shall sample, submit for testing and be responsible for the costs of testing. Adhere to Contracting Officer’s recommended amendment(s) for unsatisfactory areas.

2. Record-keeping Log for Testing: Maintain clear, concise records for all testing and sampling procedures. Log activities and results in the record-keeping log.

B. Testing Facilities

1. The following testing facilities have been pre-approved for soil testing. Testing agencies not listed below shall be approved by the Contracting Officer.

a. Soil Nutrient/Micronutrient Testing (Chemical Properties):

1) Midwest Testing Laboratories, 2645 Gravois Ave, Saint Louis, MO 63118, Phone (314) 773-3035

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2) University of Missouri, Soil and Plant Testing Laboratory , 23 Mumford Hall, Columbia, MO 65211, (573) 882-0623, Columbia, MO 65211, (573) 882-0623

3) Or approved equal

C. Tests, Definitions and Methods:

1. Chemical Properties

a. General: Testing shall be conducted in accordance with Methods and Method References in association with the Missouri Soil Testing Association Accreditation Program.

b. Testing for soil chemistry shall include Nitrate Nitrogen, Ammonium Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, Aluminum, Iron, Manganese, Lead, Cation Exchange Capacity (CEC), C:N, Soluble Salts, acidity (pH) and buffer pH.

1) Nutrient content shall be determined by the “Soil Test of Missouri Extension Office – St. Louis County” or equivalent laboratory.

2) Test for soil Soluble Salts shall be by the 1:2 (v:v) soil:water Extract Method as described in Test for Buffer pH by the SMP method.

a) Reference: Reference Soil Test Methods for the Southern Region of the United States. Bulletin 289 – Southern Cooperative Series. University of Georgia, 2983, p 4

3) Test for soil CEC (Cation Exchange Capacity) by exchangeable acidity method.

a) Reference: Methods of Soil Analysis, Pt. 2, Chemical Methods. Madison, WI: American Society of Agronomy, pp. 1367–1378.

4) Test for Soil pH shall be determined from a 1:1 soil-distilled water suspension using a glass electrode pH meter.

a) Reference: American Society of Agronomy Methods of Soil Analysis, part 2, 1986.

c. Organic Content

1) Test for soil Organic content and the ratio of Carbon/Inorganic Carbon/Total Nitrogen (C:N Ratio): Organic content, and the ratio of carbon, inorganic carbon and total nitrogen are determined by a combustion procedure (Weight loss on ignition, total kjeldahl nitrogen).

a) References: Schulte, E.E. and B.G. Hopkins. 1996.

Estimation of soil organic matter by weight by weight Loss-On-Ignition. p. 21-32. In: Soil Organic matter:

Analysis and Interpretation. (ed.) F.R. Magdoff, M.A.

Tabatabai and E.A. Hanlon, Jr. Special publication No.

46. Soil Sci. Soc. Amer. Madison, WI.

2. In-Situ Tests:

a. Standard Proctor DensityTest: Conforming to ASTM D698, Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort.

b. Density Tests (Compaction):

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1) Nuclear Method: ASTM D6938 - 10 Standard Test Method for In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth).

2) Static Cone Penetrometer: ASTM D4429 – Standard Test Method for CBR (California Bearing Ratio) of Soils in Place, using

c. Infiltration Test: Double ring infiltrometer, falling head, conforming to ASTM D3385-09

1.11 ACCEPTANCE AND MAINTENANCE

A. Request for Acceptance: In writing, request Contracting Officer’s inspection for acceptance at least 10 days in advance of preferred inspection date. Do not request inspection for acceptance until work is 100% complete (not including maintenance) and in compliance with the Contract requirements.

1. Partial Acceptance: Acceptance of partial areas or portions of the total work may be granted, at the Contracting Officer’s option, if the area to be inspected for acceptance is large, well defined, and easily described. The Contracting Officer is not obligated to provide partial acceptance of the work.

B. Acceptance Criteria for Cover Crop (Radish):

1. No bare or dead spots over 18” maximum in any direction.

2. Minimum tuber size of ½”

3. Deep green color. Pale, lime green color indicates nitrogen deficiency.

C. Acceptance Criteria for Cover Crop (Annual Rye), Lawn Areas, Seed and Sod: Create an acceptable lawn which is defined to mean a uniform, smooth lawn with well established, close stands of grass, meeting the following criteria:

1. No bare or dead spots over 3" maximum in any dimension.

2. No more than one bare spot for each square yard of lawn area.

3. A minimum of 6 thriving grass plants per square inch.

4. Free from weeds, disease, and detrimental insect infestation.

5. Roots extending four inches into new root zone.

D. Provide complete maintenance and service as required to promote and maintain healthy growth including, without limitation, watering, fertilizing, liquid biological amendments (NIC), weeding, mowing, trimming, rolling, regrading, fallen leaf removal, treating for insects and disease, and other operations and work.

1. Mow to the following heights:

a. Existing Turf in Vegetation and Soil Protection Zones: Maintain at 3.5” height prior to initiation of cover crop seeding sequence.

b. Lawn Seed: Maintain at 3” height.

c. Lawn Sod: Maintain at 2.5” height.

2. Length of Maintenance Required: Completely maintain cover crop and lawns for the duration of the Project and lawns for 60 days after Final Acceptance.

1.12 W

PART 2

2.1 P

A. R

2.2 C

A. R

B. A tial and Propr

81202 a.

WARRANTY

. Provid materi is not l abnorm unsatis

. Lawn charac during approv a.

. Warran

PRODUCT

LANTING S

Refer to Sectio

COVER CROP

Radish

. Radish (Pure L the lat a.

b.

c.

. Area o as indi

Annual Rye

. Provid a Pure

. Area indicat rietary Inform

Final Accept accepted by t de written wa ials or workm limited to, de mal foliage d sfactory chara

Replacemen cter, and qua g its one year ved by the Co

Replacement lawns shall c nty Period fo

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area within continuous ca me at which al cluding any w ve and replac periods. "Def h, failure to ad bnormal colo wn with new ed work. If shall provide ent cash paym ting for repla Seasons specif date of Final A

Planting soil mination rate o Seed shall be pliers:

ons, supplied 20, www.tillag over Seed, 9 om.

pac Seed Com mpacseed.com

Vegetation an ith a minimu the Vegetati anopy cover o ll work has be work noted on ce work that fects" is defin dequately roo or, failure to w lawn of sa a replacemen e another rep ment.

acement and fied herein.

Acceptance.

materials and of 92% and a e fresh, re-cle by Record H geradish.com

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32 92 00-7

LAWN

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JEFF - 181202 32 92 00-8

2.3 LAWN SEED

A. General: Furnish seed for permanent lawn mixture. Seed shall be fresh, re-cleaned new seed of the latest crop.

B. Provide ‘Winning Colors’ Turf Type Tall Fescue Blend, minimum Pure Live Seed 88%.

Acceptable suppliers:

1. Lebanon Turf, 1600 E. Cumberland St., Lebanon, PA, Tel:800.233.0628, www.LebanonTurf.com

2. Missouri Turf, Inc., 602 Laura Hill Road, O’Fallon, Missouri, Tel:636.240.6344, www.stlouissodcompany.com

3. Hummert International, 4500 Earth City Expressway, Earth City, MO 63045, Tel 800.325.3055, www.hummert.com.

2.4 LAWN SOD

A. Provide strongly rooted, mature, vigorous, healthy, commercially grown Tall Fescue Turf Blend free of weeds, other grasses, insects, diseases, gravel (greater than 1/8” and other deleterious matter.

2.5 COMPOST, SOIL TREATMENT AND AMENDMENTS

A. Refer to Section 32 93 10 “Liquid Biological Amendment” for Liquid Biological Amendments (LBA) (NOT IN CONTRACT), granular humates , feather meal, organic fertilizer and top-dress compost.

2.6 SAND

A. Sand for sand / compost mix shall be uniformly graded coarse sand consisting of clean, inert, sub-angular or rounded grains of quartz or other durable rock free from loam or clay, surface coatings, mica, and other deleterious materials.

1. Sand shall be from native river sources. Manufactured sand shall not be used.

B. Mechanical Gradation: Dry screened sand shall have the following gradation for material passing a Number 4 Sieve for washed sieving:

U.S. Sieve Size No.

% Passing Minimum % Passing Maximum

4 100 10 90 100 18 80 95 35 50 80 60 10 30 140 0 10 270 0 2

0.002 mm 0 1

2.7 P

A. R

2.8 M

A. S

PART 3

3.1 E

A. Pr

3.2 P

A. S tial and Propr

81202

ROTECTIVE

Refer to Sectio

MISCELLANE

oil and Pavem Protect sub-g

. Plywo vehicle

. Orient Filter F

EXECUTIO

EXAMINATIO

re-Installation work, and co Officer in wr work. Begin The Contract work in adjac shall confirm

. Plantin

. Fine g

. Landsc

. Subsoi

. Utilitie

. Irrigat

. Verify

LANTING S

ee Section 32 at all times d mix, as appro

. Place require work w that th other l rietary Inform

E FENCING

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ment Protectio grade, plantin ood: Provide es or moving ted Strand Bo Fabric under

ON

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n Examinatio onditions unde riting of all de nning work m tor shall not c cent areas is c m that:

ng soil is insta rading is acce cape Subdrain il Amendmen es have been ion main line y that there is

OIL PLACEM

2 19 19 “Plant uring the plan oved by the C and spread a ed for seed a will conform here is proper low areas.

mation

Site Preparati

ERIALS

on. The drivi g soils and pa e 3/4” Grade equipment ov oard (OSB):

mulch layer.

n Required:

er which this eficiencies an eans Contract commence wo complete and alled and has epted and rem nage is install nts have been installed and es have been i a sufficient m

MENT

ting Soil Syst nting operatio

Contracting O approved plan areas so that to the lines, drainage in a ion, Salvage a ing of vehicle avements usin

C or better ver areas to b

Two (2) Laye

The Contract work is to be nd conditions tor accepts su ork associated accepted by been accepte mains free of d led and accep installed and accepted.

installed and a means for on-s tem - Installat ons at least on fficer.

nting soil to after natural grades and el an uninterrupt and Clearing” es over plante ng one of the plywood for be planted.

ers of ¾” OS tor shall exam e performed an detrimental to ubstrates, prev d with the ins the Contracti ed.

debris.

pted.

d accepted.

accepted.

site watering tion” for exec ne stockpile o a depth suff settlement a levations ind ted pattern fre

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use as plank

SB on top of 6 mine previous nd notify the o the proper c vious work, a tallation of L ing Officer. T of installed p cution require of each type o ficiently grea and light rolli icated on the ee of hollows

Contra

32 92 00-9

LAWN

ea protection.

pressly prohib king when dr

6” mulch. Pr s work, related Contracting completion of and conditions Lawns until al The Contracto plants.

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Ensure ools or

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2. After approved planting soil has been spread, prepare it carefully by scarifying, harrowing or raking. Remove all stiff clods, lumps, litter and other foreign material and stones over 1 inch in diameter and dispose of legally off the site. Areas of planting soil shall also be free of smaller stones in excessive quantities as determined by the Contracting Officer. Roll the entire surface with a hand roller weighing approximately 100 pounds per foot of width. During the rolling fill all depressions caused by settlement with additional planting soil and then regrade and roll until the surface presents a smooth, even and uniform finish and is up to the required grade.

3. No planting soil shall be worked, handled, or otherwise disturbed when wet or frozen.

Refer to Section 32 91 19 “Planting Soil System – Installation.”

3.3 SEEDING AND SODDING PREPARATION

A. Areas of new seeding and sodding: Provide and set sufficient grade stakes to insure correct line and grade of finish grade. See Section 01 73 40 “Execution” for staking requirements.

3.4 COVER CROP AND LAWN SEEDING AT EXISTING SOILS TO REMAIN (EX-1 & EX-2)

A. General:

1. Provide cover crop seed, LBA applications (NOT IN CONTRACT), soil amendments, and final seeding in the sequence described below.

2. Adhere to planting installation dates as defined in Part I of this Section.

3. For LBA Applications, see Section 32 93 10 “Liquid Biological Amendments.” (NOT IN

CONTRACT)

4. Compost for compost top dress shall conform to Section 32 93 10 “Liquid Biological Amendments.” For each compost top dress application, spread compost to a depth of 1” deep across the surface (1 CY of compost per 36 cy area.)

5. For seeding methods, refer to part 3.6 of this Section.

B. Seeding at existing soil to remain outside of existing tree canopies (EX-1):

1. Three weeks prior to cover crop seeding, begin program of existing turf stressing. Mow existing turf to 1” height on two successive occasions. Turn off irrigation system.

2. Core Aerate.

a. Core aerate to a 4”depth and horizontal spacing at 6” on center in both directions.

b. Fill aeration holes with a mixture of 5 parts compost to 1 part sand.

c. Spread compost top dress over existing turf.

3. Allow a minimum of 1 week to pass following compost top dress, then seed with Cover Crop using the slit seed method.

4. Irrigate Cover Crop as required to promote growth. Irrigation shall be minimal to avoid competition with existing turf. Allow at minimum one watering to germinate seeds (either rain event or irrigation) and one watering post emergence (either rain event or irrigation).

5. Within two weeks of seeding, provide LBA Application #1 (NOT IN CONTRACT).

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6. Allow cover crop to over winter and decompose in-situ in the spring. Time dethatching / removal of vegetative debris with seeding schedule for spring 2015.

7. Seed with lawn seed.

8. Two weeks after seeding, provide LBA Application #2 (NOT IN CONTRACT).

9. See Section 32 93 10 “Liquid Biological Amendments” for additional LBA applications.

(NOT IN CONTRACT)

10. During the next planting season following initial seeding, overseed with lawn seed.

C. Seeding at existing soil to remain within existing tree canopies (EX-2):

1. Provide LBA Application #1 (NOT IN CONTRACT).

2. Three weeks prior to cover crop seeding, begin program of existing turf stressing. Mow existing turf to 1” height on two successive occasions. Turn off irrigation system.

3. Spread compost top dress over existing turf.

4. Allow a minimum of 1 week to pass after applying compost top dress, then seed with Cover Crop using the slit seed method.

5. Irrigate Cover Crop as required to promote growth. Irrigation shall be minimal to avoid competition with existing turf. Allow at minimum one watering to germinate seeds (either rain event or irrigation) and one watering post emergence (either rain event or irrigation).

6. Allow cover crop to over-winter. Allow radish cover crop to decompose in-situ, and mow / maintain annual rye cover crop to 3”height. Time dethatching and removal of vegetative debris with seeding schedule for spring 2015.

7. Seed with lawn seed.

8. Two weeks after seeding, apply LBA Application #2. (NOT IN CONTRACT)

9. See Section 32 93 10 “Liquid Biological Amendments” for additional LBA applications.

(NOT IN CONTRACT)

10. During the next planting season following initial seeding, overseed with lawn seed.

3.5 SEEDING INSTALLATION

A. General:

1. Perform examination of work as described in this Section, Part 3.

2. Limit of lawn seeding shall be as shown on the Drawings. All areas on the plan are to be seeded only after written approval of the finished grading or as directed by the Contracting Officer.

3. Seed only when areas are in a friable condition and neither hard, muddy, wet, frozen.

Seed only after the topsoil areas have been prepared and treated as herein described.

4. Do not seed when wind velocity exceeds 5 mph.

5. Water seed thoroughly at the rate of 5 gallons per square yard with a fine spray immediately after sowing.

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6. During the next planting season following initial seeding, overseed with lawn seed.

B. Cover crop and lawn seed mixes shall be installed by the slit seeding method.

1. Prior to seeding, dethatch the existing lawn. Remove cover crop residue.

2. Provide a mechanical slit seeder to open a ¼” slit in the ground, insert the seed and close the soil. Spacing:

a. Cover Crop Seed: Seed in 15” rows using 60-cell small milo or sugar beet plate with a 4” in-row spacing.

b. Lawn Seed: Seed shall be placed a maximum of 2 inches apart. Make two passes, seeding at 50 percent of the recommended rate in each pass. The two passes shall be at a 45 degrees angle to each other, leaving a diamond-shaped pattern.

C. The slit seeding unit shall have concave disk blades open while the seed is dropped to ensure the seed gets into the soil. Seeding Rate:

1. Cover Crop Seed (Radish): Slit Seed at 3.5 lbs / acre.

2. Cover Crop Seed (Annual Rye): Slit Seed at 5 lbs / 1000 sf.

3. Lawn Seed: Slit seed at 6 lbs / 1000 sf.

4. Overseeding Lawn Seed: Slit seed at 4lbs / 1000 sf.

3.6 SOD INSTALLATION

A. General:

1. Perform an examination of work areas as described in this Section, Part 3.

2. Cut, deliver, and install sod within a 24-hour period.

3. Do not harvest or transport sod when moisture content may adversely affect sod survival.

Protect sod from sun, wind, and dehydration prior to installation.

4. Do not lay dormant sod or install sod on wet or frozen soil.

5. Do not tear, stretch, or drop sod during handling and installation.

6. Scarify top 2” of planting soil and place sod immediately.

B. Sod Placement: Dampen dry soil prior to placing sod. Install initial row of sod in a straight line, beginning at bottom of slopes, and lay sod perpendicular to slope direction. Place subsequent rows parallel to and lightly against the previously installed row. Lay sod to form a solid mass with close joints.

1. No space between joints should be greater than 1/2" by 1/2". Fill any space between joints to level with lawn planting soil mix.

2. Cut sod to conform and fit tightly with adjacent element.

3. Butt ends and sides of sod strips; do not overlay edges. Stagger strips to offset joints in adjacent courses.

4. Set sod pad top flush with adjacent curbs, sidewalks, drains, and seeded areas.

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5. Rolling: Press sod firmly into contact with the sod bed by tamping, rolling, or by other methods approved by Contracting Officer to eliminate air pockets, provide true and even surfaces, ensure knitting and protect all exposed sod edges, but without displacement of the sod or deformation of the sod surface. Sod surface shall be smooth and free of depressions or lumps, and without gaps, seams and bare patches.

6. Watering: Water sod thoroughly at the rate of 5 gallons per square yard with a fine spray.

7. Mowing: The first mowing of sodded areas shall not be done until the sod is firmly rooted, as determined by the Contracting Officer, and securely in place. Not more than 40% of the grass leaf shall be removed by the initial or subsequent mowing.

8. Aeration: After sod has rooted sufficiently, as determined by the Contracting Officer, aerate the sod with a hollow tine aerator using 3/4 in tines on 2-inch spacing. The aerator should be a piston type aerator. A disk or rolling aerator is not acceptable. Harvest and discard aeration cores using sweepers or other approved devices. Topdress using sufficient original root zone soil mix to fill aeration holes and provide an additional 1/4" of root zone soil over entire area. Broom topdressing to smooth surface.

3.7 EROSION CONTROL

A. For soil left bare prior to seeding, refer to Section 01 57 23 “Temporary Storm Water Pollution Prevention.”

3.8 WATERING

A. Watering of Lawn Areas

1. First Week: The Contractor shall provide all labor and arrange for all watering necessary to establish an acceptable lawn. In the absence of adequate rainfall, watering shall be performed daily or as often as necessary during the first week and in sufficient quantities to maintain moist soil to a depth of at least 2 inches.

2. Second and Subsequent Weeks: The Contractor shall water the lawn as required to maintain adequate moisture, in the upper 5 inches of soil, necessary for the promotion of deep root growth.

3. Watering shall be done in a manner which will provide uniform coverage, prevent erosion due to application of excessive quantities over small areas, and prevent damage to the finished surface by the watering equipment. The Contractor shall furnish sufficient watering equipment to apply one complete coverage to the seeded areas in an 8 hour period.

3.9 REPAIR OF INSTALLED LAWNS

A. If lawn is damaged, remove damaged materials and replace with seed or sod, as originally installed.

B. If lawns exhibit unsatisfactory growth, perform soil testing for chemical properties, compaction and infiltration rates. Coordinate with testing defined in Section 32 93 10 “Liquid Biological Amendment (LBA)”. Adhere to Contracting Officer’s recommended remediation. Remediation

JEFF - 181202 32 92 00-14

may include, but are not limited to, soil amendments, LBA treatments (NOT IN CONTRACT), or soil decompaction.

3.10 CLEANUP, PROTECTION AND EXCESS MATERIALS

A. Following the final acceptance of lawns, the Contractor shall immediately remove from the site all materials and equipment not required for any other planting or maintenance work.

B. Store materials and equipment remaining on site in locations which do not interfere with construction operations or maintenance activities.

C. The Contractor shall be responsible for keeping all paving surfaces clean during placement of planting soil mix and seeding operations.

D. Provide temporary protection to ensure work is without damage or deterioration after installation.

E. Protection of Drainage System: Protect existing drainage protection system at all drain inlets to prevent silt, materials or debris caused by planting operations from entering the drainage system.

END OF SECTION