05-0088 SPECS.pdf

PDF 1 MB Posted Jan 29, 2009

Attached to: RECOVERY - QJVF050088 - Repair Lift Station 2112 - Family Housing
Solicitation number: FA4528-09-R-0002
Issued by: Department of the Air Force Global Strike Command

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Specifications for Repair of Lift Station (FA4528-09-R-0002)

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File	Type	Posted
Amendment 0001, Extension.doc	DOC document	Mar 2, 2009
Amendment 0002, Clarifications.doc	DOC document	Mar 2, 2009
Attachment 5 Technical Acceptance Criteria.doc	DOC document	Feb 4, 2009
ATTACHMENT 4 RESPONSIBILITY.doc	DOC document	Feb 4, 2009
C-2.cal	—	Feb 3, 2009
T-1.cal	—	Feb 3, 2009
C-3.cal	—	Feb 3, 2009
DRAWINGS.SVD	SVD file	Feb 3, 2009
C-1.cal	—	Feb 3, 2009
DRAWINGS.SVD	SVD file	Jan 29, 2009
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S P E C I F I C A T I O N

FOR PROJECT

MIN 05-0088

REPAIR LIFT STATION 2112, MFH

MINOT AIR FORCE BASE, NORTH DAKOTA

PREPARED BY:

5 CES, ENGINEERING FLIGHT

MINOT AIR FORCE BASE, NORTH DAKOTA

MARCH 2008

i 05-0088

TABLE OF CONTENTS

DIVISION 1 - SITEWORK PAGES

01300 Submittals 01300-1 thru 5

DIVISION 2 - SITEWORK

02005 Sitework 02005-1 thru 4 02010 Subsurface Conditions 02010-1 Attachment: Boring Data Pages 1 thru 3 02075 Demolition 02075-1, 2 02110 Clearing 02110-1, 2 02210 Site Grading 02210-1, 2 02215 Excavation 02215-1 thru 3 02220 Backfilling 02220-1 thru 3 02221 Trenching 02221-1 thru 5 02265 Landscape Grading 02265-1 thru 2 02485 Seeding 02485-1 thru 7 02530 Sanitary Sewer 02530-1 thru 4 02531 Sanitary Sewer Pumping Stations 02531-1 thru 10 02950 Trees, Plants and Ground Cover 02950-1 thru 6

DIVISION 3 - NOT USED

DIVISION 4 - MORTAR

04300 Unit Masonry system 04300-1 thru 5

DIVISION 5 – METALS

05521 Metal Tube and Railing 05521-1 thru 4

DIVISION 6 THRU 8 – NOT USED

DIVISION 9 – FINISHES

09900 Painting 09900-1 thru 8

DIVISION 10 THRU 15 – NOT USED

01300-1

DIVISION 1 - GENERAL REQUIREMENTS

SECTION 01300

SUBMITTALS

1. GENERAL:

1.1 PROCEDURES:

1.1.1 The Contractor shall be required to submit items listed in the Submittal Schedule at the end of this section.

1.1.2 Transmit each item under AF 3000, Material Approval Submittal form. Identify contract number, project number, and Contractor. Identify section and paragraph reference for each item submitted with the AF 3000.

Submit five (5) copies unless otherwise required elsewhere in the specification.

1.1.3 Unless specifically stated otherwise elsewhere in this

specification, each submittal shall be approved by the Contracting Officer prior to incorporation of materials into the work.

1.1.4 Approvals of submittals which do not conform to the Contract shall not be construed as a change to the contract.

1.1.5 The Contractor shall fill in the "Required Submission Date" on the AF Form 66s with the date he plans on submitting the submittals to the Government. A copy of the AF Form 66s with the required submission date filled in shall be submitted to the Contracting Officer for use by the contract administrator. Submit in accordance with Section 01300.

1.2 MANUFACTURER'S DATA AND SAMPLES: For the following types of submittals when a specific product of a specific manufacturer is identified (by catalog or product number, pattern, or style) and the Contractor does not desire to propose an alternate product as an equal, where an equal is allowed, a detailed submittal will not be required. The Contractor shall submit on an AF Form 3000 a list of submittals for which the specified products will be used. Submit in accordance with procedures identified in 1.1 above.

1.2.1 Product Data: Submit complete manufacturer's literature which describes all salient characteristics identified as requirements in the specification. Literature which is not specific to the proposed product shall be marked to indicate clearly which item is being proposed for use in this contract.

01300-2

1.2.2 Manufacturer's Certification: Submit a statement from the product manufacturer that proposed products meet the specified standards and other salient characteristics identified as requirements in the specification.

1.2.3 Installation Instructions: Submit manufacturer's printed instructions for delivery, storage, assembly, installation, start-up (if applicable) and adjustments. Information shall include temperature restrictions and any other environmental limitations as well as substrate preparation requirements if any exist.

1.2.4 Samples:

1.2.4.1 Submit full range of manufacturer's standard colors, textures and patterns for specified items for selection by the Contracting Officer.

1.2.4.2 Submit samples to illustrate performance and

functional characteristics of the product. Samples shall include integral parts, attachment devices and specified accessories. Provide full identification information on each sample.

1.3 SHOP DRAWINGS: Drawings shall illustrate how the specified materials are integrated into the work as a whole. Adjacent materials which affect the complete installation of the specified products shall be shown and identified.

Deviations from Contract drawings shall be clearly identified and reason for deviation clearly explained.

1.4 TEST DATA: Test results shall be dated and signed by the agency performing the test.

1.5 WARRANTY: Submit detailed warranty information which identifies specifically items covered as well as exclusions from the warranty and the warranty period. All copies shall be dated and signed by an authorized officer of the company. The officer's name and title shall be typed on the warranty adjacent to the signature.

1.6 OPERATION/MAINTENANCE INSTRUCTIONS: Submit manufacturer's published instructions.

1.7 MISCELLANEOUS SUBMITTALS: Submittals which are none of the above types shall meet the specific requirements identified in the referenced paragraph of the Specification Section identified in the schedule.

1.8 SUBMITTAL SCHEDULE: The following is a list of required submittals for this Contract.

O F

U B

P ro je ct

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CERTIFICATION OF

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COLOR SELECTION

MANUFACTURER'S

RECOMMENDATIONS

MANUFACTURER'S

WARRANTY

CATALOG DATA

OPERATING

INSTRUCTIONS

TESTS

OTHER

REQUIRED SUBMISSION

DATE

DATE RECEIVED IN

CONTRACTING

DATE TO CIVIL

ENGINEERING

RETURN SUSPENSE

DATE

SUBMITTAL NUMBERS

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O F

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CERTIFICATION OF

COMPLIANCE

SHOP DRAWINGS

SAMPLES

COLOR SELECTION

MANUFACTURER'S

RECOMMENDATIONS

MANUFACTURER'S

WARRANTY

CATALOG DATA

OPERATING

INSTRUCTIONS

TESTS

OTHER

REQUIRED SUBMISSION

DATE

DATE RECEIVED IN

CONTRACTING

DATE TO CIVIL

ENGINEERING

RETURN SUSPENSE

DATE

SUBMITTAL NUMBERS

D A

O N

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CONTRACTOR

RESUBMITTAL

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A-

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O N

0/ 1.

1300-4

O N

L C

O F

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P ro je ct

N um be rP ro je ct T ic ita tio n/ C on tra ct N um be r Q

-0

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2, B E

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B Y

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A be r o f C op ie s

R eq ui re d

LINE NUMBER

O R

C R

O N

O F

, C O

A C

T R

E, T

O F

CERTIFICATION OF

COMPLIANCE

SHOP DRAWINGS

SAMPLES

COLOR SELECTION

MANUFACTURER'S

RECOMMENDATIONS

MANUFACTURER'S

WARRANTY

CATALOG DATA

OPERATING

INSTRUCTIONS

TESTS

OTHER

REQUIRED SUBMISSION

DATE

DATE RECEIVED IN

CONTRACTING

DATE TO CIVIL

ENGINEERING

RETURN SUSPENSE

DATE

SUBMITTAL NUMBERS

D A

O N

R N

CONTRACTOR

RESUBMITTAL

FINAL APPROVAL

A R

K S

R O

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D R

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S C

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01300-5

02005-1

QJVF 05-0088

DIVISION 2 - SITEWORK

SECTION 02005

SITEWORK

1.1 PROTECTION:

1.1.1 Protect trees, shrubs, lawns, walks, and other features remaining as portion of final landscaping.

1.1.2 Protect bench marks, existing structures, paving and curbs.

1.1.3 Protect above-and below-grade utilities which are to remain.

1.1.4 Repair damage.

1.1.5 Protect excavations as required to prevent cave-in or loose soil from falling into excavations.

1.1.6 Notify Contracting Officer of unexpected subsurface conditions and discontinue work in affected areas until notified to resume work.

1.1.7 Grade excavation perimeter to prevent surface water run-off from entering into excavation.

1.2 PERMITS:

1.2.1 AF Form 103: The Contractor shall obtain from Construction Management, 320 Peacekeeper Place, an AF Form 103, "Base Civil Engineering Work Clearance Request," prior to proceeding with an actual excavation, as per Section 01005, paragraph 1.15.

1.3 REFERENCES:

1.3.1 ASTM C 136: Sieve analysis of fine and course aggregates.

1.3.2 ASTM D 698: Tests for moisture - Density Relations of Soils and Soil-Aggregate Mixtures using 5.5-lb. Rammer and 12-inch drop.

1.3.3 ASTM D 1556: Density of Soil in place by Sand Cone Method.

1.3.4 ASTM D 1557: Moisture Density Relations of Soils and Soil Aggregate Mixture using 10-lb. Rammer and 18-inch drop.

02005-2

2. PRODUCTS:

2.1 FILL MATERIAL:

2.1.1 Gravel: Pit run natural stone; free of shale, clay, friable materials and debris; graded in accordance with ANSI/ASTM C 136.

2.1.2 Pea Gravel: Natural stone, free of clay, shale, organic matter; 1/4-inch minimum to 5/8-inch maximum size graded in accordance with ANSI/ASTM C 136.

2.1.3 Sand: Natural river or bank sand, free of clay, silt, loam, friable or soluble materials and organic matter; graded in accordance with ANSI/ASTM C 136.

2.1.4 Common Fill: Reused, free of gravel larger than 3-inch size and debris.

2.2 TOPSOIL: Natural, fertile agricultural soil capable of sustaining vigorous plant growth, not in muddy or frozen condition, containing not less than 6% organic matter. Free of subsoil, slag, clay, stones, lumps, live plants, roots, sticks, crab grass, cough grass, noxious weeds and foreign matter.

2.3 SEED: Two pounds Crested Wheat - one pound Kentucky Bluegrass.

2.4 FERTILIZER: Commercial Type with 50% of the elements derived from organic sources.

3. EXECUTION:

3.1 PREPARATION:

3.1.1 Identify required lines, levels, contours, datum, below grade utilities, aboveground utilities.

3.1.2 Maintain and protect existing utilities.

3.1.3 Upon discovery of unknown utilities or concealed conditions, discontinue affected work and notify Contracting Officer.

3.2 EXCAVATION:

3.2.1 Excavation subsoil required for building foundations, construction operations and other work.

02005-3

3.2.2 Machine slope banks to angle of repose or less until shored.

3.2.3 Excavation shall not interfere with normal 45 degree bearing splay of any foundation.

3.2.4 Hand trim excavation and leave free of loose matter.

3.2.5 Remove lumped subsoil, boulders and rock, up to 1/3 cubic yard measured by volume.

3.2.6 Correct unauthorized excavation.

3.2.7 Remove from site excess subsoil not being reused.

3.3 FIELD QUALITY CONTROL:

3.3.1 Provide for visual inspection of bearing surfaces.

3.3.2 Brace walls to support surcharge force of backfilling.

3.4 BACKFILLING:

3.4.1 Backfill areas to contours and elevations. Use unfrozen materials.

3.4.2 Backfill systematically, as early as possible, to allow maximum time for natural settlement.

3.4.3 Place and compact fill material in continuous layers not exceeding 8 inches loose depth.

3.4.4 Do not disturb or damage foundation, waterproofing, protective cover or insulation.

3.4.5 Maintain optimum moisture content of backfill materials to attain required compaction density.

3.4.6 Slope grade away from building a minimum of 2 inches in 10 feet unless noted otherwise.

3.4.7 Remove surplus backfill materials from site. Leave stockpile areas completely free of excess fill materials.

3.5 LANDSCAPE GRADING:

3.5.1 Place 4 inches of topsoil in areas to receive seeding.

02005-4

3.5.2 Fine grade relatively dry topsoil eliminating rough or low spots.

3.5.3 Remove foreign material including roots, grass and weeds.

3.5.4 Lightly compact topsoil.

3.5 5 Remove excess soil from site.

3.5.6 Tolerance of topsoil: plus or minus 1/2 inch.

END OF SECTION

02010-1

SECTION 02010

SUBSURFACE CONDITIONS

1.1 DESCRIPTION:

1.1.1 A soils investigation report has not been prepared. Soil Boring Records in vicinity of Lift Station 2111 follow this section.

1.1.2 If questionable soil conditions arise, notify the Contracting Officer or his Technical Representative.

1.2 ADDITIONAL INFORMATION:

1.2.1 The Contractor should acquaint himself with the site in accordance with Section 01005.

1.2.2 Historically, water has been found 2 to 3 feet below grade at Minot Air Force Base.

1.3 QUALITY ASSURANCE:

1.3.1 A Soils Engineer may be retained by the Air Force to observe performance excavating, filling and grading.

1.3.2 Readjust all work performed that does not meet the technical or design requirements.

2. PRODUCTS: NOT USED.

3. EXECUTION: NOT USED.

MATERIAL TFSTING SERVICES, LLC

Box 634

MinQ[. North Dakota 58702

(701) 852-5553

SOIL BORING RECORD

~ORING NUMBER 24 SHEET 1 OF 1

PROJECT FAMILY HOUSING REPLACEI\IEl\'T PROJECT LOCATION MAFB. NORm DAKOTA

PROJECT NUMBER 01·053

START DATE 5/10/01 FINISH DATE 5/10/01

:t:U ~'"fu e ~ ffi ~ >:><t:UJ -1 m

SOIL DESCRIPTION

t!l ..J l5 I:>- CIl r--=l:.;;ICIi""":·~:;i:laiiclle=oimf~gn;;r~aiElvVr:elS:, ~btiroIiw~nJ, Ci;:~;;~~N[b:r(r::Iwn~·A~,y&r..iia-~~>Q' 1630.7

\black mixed, some organics ~

2.Q TOPSOU ORGANIC SANDY LEAN .

1629.7 ~. black, soft (OL) J

.F-AN .Av. light brown. monied, son, suingers of lime-like material (eL)

5.0 1626.7~ CLAYEY SAND, grayish brown, moist.

6:.Ql....medium (SC) 1625.7i SANDY LEAN CLAY. a Iinle gravel. Igrayish brown. monied, medium, lignite

I fragments (eL)

I I j

MA: See allacht:d particle size analysis

I I

21.0 i SAMPLE , Z~ elL.

H'" w..J Q.w we

GEOLOGY ~

i W t!l w ..J

"" >a::

U W Ct:

CIl :::I ..J

TEST RESULTS

...... ~I ~a::-I ~e~U~ ~

..J wUJlffi~!H"" ~"" a: ~ ::>11- z,~~ CIl~ :> '<t:UJ'<l:wlo H <l:H1:::1-1::::1 ~ Hx: ...JI:Z I Z·..JH Q.H

"" 0: ...II ...II U 1

Ul Q.

1631.7 ..,....TFl"'!iiIJTi'l-.-I----..,..-s-s-+--;--;:---~-~--i -~~-, 2-3-4

OpSOI IX (7) '

Glacial Till f

1-2-2

IX (4)

5 ss f

1·3-4 15 30 15 MI

1626.7 IX (7)

55 rx r---'

)-4-6 (10)

1621.7 55 rx r---'

4·5·7 (12)

55 ~ 4-5-6 !

f--' (11)

1616.7 55 ~ 3-4·7 I f--' (II)

lEd 1.7m	55 6-7-10X (ll)
1fl1C.7	end of horing

-none measurable I, 105 H Street

DRfi.LER JP

DRILL RIG CME4S

METHOD 4" FA O'lo 19.5'

LOGGER JP

REVIEWER JZ

...I ~ SAMPLED CASING CAVE-~ DiULLlNG WATEl ::J

DATE TIME DEPTIi DEPTH DEPTH IMUD LEVEL LEVEL r--T").';";I0:---1~1;;:OO;:;:7;-j--::2::-;1 ,--t--_-+--:-::19~.5"--1r---- --f-----:.:-;N;;":M..

~ ~ >10 1445 21' - 18.5' - 17'

< < .' .1, ~., ...

MATERIAL TESTING SERVICES. llC

Box 634

Minot. North Dakota 58702

(701) 852-5553

SOIL BORING RECORD

BOltING NUMBER 25 SHEET 1 Of 1

PROJECT FAMILY HOUSING REPLACEMENT

PROJECT LOCATION MAFB, NORTH DAKOTA

PROJECT NUMBER 01-053

START DATE 5/10/01 FINISH DATE 5110/01

"" . SAMPLE TEST RESUlT~ ,~ ...JeD ....Z' " :r I.L.. 0 "" iI ~~ O~ ~" n.. H ..." W ~: '"

~ g SOIL DESCRIPTION ~ ~:l: GEOLOGY w ffi ~ ~ :3 !Jill ffi~!S~ ~~ a: ~ 6 w~..J~"" ~ (J) llJ ~ <J: 1-:> I-ffi,::::l~ en~ W <J: 1l3:l ~ LIJ 6 0 ::> <J: W <J: ~I~~ <J:H >- :> I: ...J ,. -J :I:..J 3 Z',..JI:I-n:<J:UJ >-, - CD Z Q' HQ..~ ( ..J ...J en ';"-"'--1 ~ '" wi ..J -J t-..:w=-,-;J;T;::;nrT"I-",~ne~rlv""ll~~:'A~,M;!;m~,~v7T';=-J::7',A,~ -to"F~iliill-----""";~-+-+-+---+--+---..4-~-IN'r:;r";Ar"i'v~a-~'" 1629.~ I trace of gravel, brown, dark brown &.

, black mixed, some organics

2.01 1627,8\ LEAN CLAY, grayish brown. mottled, I rather stiff, stringers of Iime·like material

. (CL)

4.0i

1625.81 SANDY I.EAN CLAY. a trace of gravel.

brown, mottled, medium to rather stiff, , pocketS of lime-like material, lignire I fragments (CL)

I zJ

I i

1114 Delta Drive

DRIllER JP

DRILL RIG CME4S

METHOD 4" FA O'to 19.5'

LOGGER JP

L-REVrE\X'ER JZ

Glacial Till

1624.8

1619.8

1614.8

1609.8

~ ::E

? ::il

DATE

5-10

TIME

...l._~~__..:.....__.~

SS"'-X }·s·s i (10) r-..:

5S ~ 5-6-6 (12)

55 ~~ )-)·4 I"

(7)

2·3·4 19 (7)

2-4-655 ;< (to)

3·4-(' (10)

3·4-75S rx

(11)

2·3·7 110)

SAMPLED CASING

DEPTH DEPTH

21'

CAVE-IN DRIllING WAn:

DEPTH MUD UVEL LEVE:

18' - 8'

15' - I SO

P.O. BOll 634

MInot. NO 58702

1701) 852·5553

P.O. BOll 1093

WillisTon, NO 58802

MATERIAL TESTING SERVICES, LLC

(701) 572·4226

PARTICLE SIZE ANALYSIS

PROJECT: FAMILY HOUSING REPLACEMENT

MAFB. NORTH DAKorA

DACA05-01-C-0002

REPORTED TO: R & R Joint Venrure

PO Box 2045

Minot, North Dakota 58702-2045

Laboratory Number. 01-053

DATE: May 29.2001

FURNISHED BY:

COPIES TO: US Army Corps of Engineers (I) clo Base Post Office

Minot AFB. North Dakota 58705

HYDROMETERu.s. SIEVE OPENING IN INCHES I U.S. SIEVE NUMBERS I

6 4 3 2, 5 1 3141 /2318 4 8'01620304050 100 200

R 70

C E N T 60

E 50

B v

G 30

100 10 0.01 0.001 1 0.1

GRAIN SIZE IN MILLIMETERS

I III II I I I r-~ ~

I I I ! I I I t'

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COBBLES :

GRAVEL i SAND coarse I fine Icoarse! medium 1 fine

SILT OR CLAY

Specimen Identification Classification MC% LL PL PI Cc Cu

8-24 SANDY LEAN eLAY CL 14.2 30 15 15 Specimen Identifi·cation I D100 D60 D30 D10 %Gravel %Sand % Silt O/OClay

6-24 9.50 0.10 0.003 1.8 41.6 21.7 34.9

Remarks: Bonng 24, spIn-spoon sample, depth of 7 to 8.5 feel

02075-1

SECTION 02075

DEMOLITION

1.1 GENERAL REQUIREMENTS: The work includes demolition or removal of all construction indicated or specified. All materials resulting from demolition work, except as indicated or specified otherwise, shall become the property of the Contractor and shall be removed from the limits of Government property. Rubbish and debris shall be removed from Government property daily unless otherwise directed so as to not allow accumulation on site. Materials that cannot be removed daily shall be stored in areas specified by the Contracting Officer.

1.2 SUBMITTALS: The procedures proposed for the accomplishment of salvage and demolition work shall be submitted for approval. The procedures shall provide for safe conduct of the work, careful removal and disposition of materials specified to be salvaged, protection of property which is to remain undisturbed, and coordination with other work in progress. The procedures shall include a detailed description of the methods and equipment to be used for each operation, and sequence of appropriate documentation.

1.3 USE OF EXPLOSIVES: Use of explosives will not be permitted.

2. PRODUCTS: Not Used.

3. EXECUTION:

3.1 PROTECTION:

3.1.1 Protection of Existing Work: Before beginning any cutting or demolition work, the Contractor shall carefully survey the existing conditions and examine the drawings and specifications to determine the extent of the work. The Contractor shall take all necessary precautions to ensure against damage to existing work that is to remain in place, to be reused, or to remain the property of the Government. Any damage to such work shall be repaired or replaced as approved by the Contracting Officer at no additional cost to the Government. The Contractor shall carefully coordinate the work of this Section with all other work.

02075-2

3.1.2 Utilities: When utility lines are encountered that are not indicated on the drawings, work shall stop, and the Contracting Officer shall be notified.

3.2 DUST CONTROL: The amount of dust resulting from demolition shall be controlled to prevent the spread of dust to occupied portions of the airfield and to avoid creation of a nuisance in the surrounding area. Use of water will not be permitted when it will result in, or create, hazardous or objectionable conditions such as ice, flooding, and pollution.

3.3 DISPOSITION OF MATERIAL:

3.3.1 Title to Materials: Title to all materials and equipment to be demolished, excepting materials to be reused, is vested in the Contractor upon receipt of notice to proceed. The Government will not be responsible for the condition, loss or damage to such property after notice to proceed.

3.3.2 Material for Contractor Salvage: Salvage materials shall be removed from Government property daily. Material for Salvage shall not be sold on the site.

3.3.3 Unsalvageable Materials: Concrete, masonry, and other

noncombustible materials shall be disposed of off base at a location to be determined by the Contractor.

3.3.4 The use of burning at the project site for the disposal of refuse and debris will not be permitted.

3.4 CLEANUP:

3.4.1 Debris and Rubbish: Debris and rubbish shall be removed from MAFB by the Contractor daily.

3.4.2 Debris Control: Debris shall be removed and transported by the Contractor in a manner as to prevent spillage on streets or adjacent areas. Material that is spilled shall be cleaned up immediately.

3.4.3 Regulations: Federal, state, and local regulations regarding hauling and disposal shall apply.

3.5 TEST SECTIONS: The Contractor shall demonstrate his method of removal upon initiation of the work. Any pavement beyond the limits of the removal area that is damaged by the Contractor's removal operations

02075-3 shall be removed and replaced at the Contractor's expense, using methods and materials specified under this contract.

02110-1

SECTION 02110

CLEARING

1.1 WORK INCLUDED:

1.1.1 Clear site of plant life and grass.

1.1.2 Remove root system of trees and shrubs.

1.1.3 Remove surface debris.

1.2 RELATED WORK:

1.2.1 Section 02210 - Site Grading.

1.2.2 Section 02215 - Excavation.

2. PRODUCTS: NOT USED

3. EXECUTION:

3.1 CLEARING:

3.1.1 Clear areas required for access to site and execution of work.

3.1.2 Remove trees and shrubs within marked areas. Grub out stumps, roots and surface rock.

3.1.3 Clear undergrowth and deadwood, without disturbing subsoil.

3.2 PROTECTION:

3.2.1 Protect plant growth and features remaining as final

landscaping.

3.2.2 Protect bench marks and existing work from damage or

displacement.

3.2.3 Maintain designated site access for vehicle and pedestrian traffic.

02110-2

3.3 REMOVAL:

3.3.1 Remove debris from site.

02210-1

SECTION 02210

SITE GRADING

1.1.1 Remove topsoil and remove excess from site.

1.1.2 Grade and rough contour site.

1.2 RELATED WORK:

1.2.1 Section 02075 - Demolition

1.2.2 Section 02215 - Excavation

1.2.3 Section 02220 - Backfilling

1.2.4 Section 02221 - Trenching

1.2.5 Section 02265 - Landscape Grading

1.3 PROTECTION:

1.3.1 Protect trees, shrubs, lawns, rock outcropping and other features remaining as portion of final landscaping.

1.3.2 Protect bench marks, existing structures, fences, roads, sidewalks, paving and curbs.

1.3.3 Protect above- or below-grade utilities which are to remain.

1.3.4 Repair damage.

2. PRODUCTS:

2.1 MATERIALS:

2.1.1 Topsoil: Excavated material, graded free of roots, rocks larger than one inch, subsoil debris and large weeds.

02210-2

2.1.2 Subsoil: Excavated material, graded free of lumps larger than six inches, rocks larger than three inches and debris.

3. EXECUTION:

3.1 PREPARATION:

3.1.1 Identify required lines, levels, contours and datum.

3.1.2 Identify known below grade utilities. Stake and flag

locations.

3.1.3 Identify and flag aboveground utilities.

3.1.4 Maintain and protect existing utilities remaining which pass through work area.

3.1.5 Notify utility company to remove and relocate utilities.

3.1.6 Upon discovery of unknown utility or concealed conditions, discontinue affected work and notify Contracting Officer.

3.2 TOPSOIL EXCAVATION:

3.2.1 Excavate topsoil from areas to be further excavated, re-landscaped, or regraded; stockpile in area designated on site.

3.2.2 Do not excavate wet topsoil.

3.2.3 Stockpile topsoil to depth not exceeding 8 feet. Cover to protect from erosion.

3.3 SUBSOIL EXCAVATION:

3.3.1 Excavate subsoil from areas to be re-landscaped or regraded and remove excess subsoil not being reused from site.

3.3.2 Do not excavate wet subsoil.

3.3.3 When excavation through roots is necessary, perform work by hand and cut roots with a sharp axe.

3.4 TOLERANCES:

3.4.1 Top Surfaces of Subgrade: Plus or minus one percent.

02215-1

SECTION 02215

EXCAVATION

1.1.1 Material excavation.

1.1.2 Shoring excavations.

1.2 RELATED WORK:

1.2.1 Section 02210 - Site Grading

1.2.2 Section 02220 - Backfilling

1.2.3 Section 02221 - Trenching

1.3 PROTECTION:

1.3.1 Protect trees, shrubs, lawns and other features remaining as a portion of final landscaping.

1.3.2 Protect bench marks, existing structures, sidewalks, paving and curbs from equipment and vehicular traffic.

1.3.3 Protect above- and below-grade utilities which are to remain.

1.3.4 Protect excavations by shoring, bracing, sheet piling, under pinning or other methods required to prevent cave-in or loose soil from falling into excavation.

1.3.5 Underpin adjacent structures which may be damaged by

excavation work, including service utilities and pipe chases.

1.3.6 Notify Contracting Officer of unexpected subsurface conditions and discontinue affected work in area until notified to resume work.

1.3.7 Protect bottom of excavations and soil adjacent to and beneath foundations from frost.

02215-2

1.3.8 Grade excavation top perimeter to prevent surface water run-off from entering into excavation. Promptly remove all water collecting in depressions.

1.4 PERMIT:

1.4.1 Permit: The Contractor shall obtain from Construction

Management, 320 Peacekeeper Place, an AF Form 103 (Base Civil Engineer Work Clearance Request) prior to proceeding with any actual excavation as per Section 01005/1.15 of this specification.

2. PRODUCTS:

2.1 MATERIALS:

2.1.1 Subsoil: Excavated material, graded free of lumps larger than 6 inches, rocks larger than 3 inches and debris.

2.1.2 Pea Gravel: Mineral aggregate graded 1/4 inch to 5/8 inch free of soil, subsoil, clay, shale or foreign matter.

3. EXECUTION:

3.1 PREPARATION:

3.1.1 Identify required lines, levels, contours and datum.

3.1.2 Identify known underground utilities. Stake and flag

locations.

3.1.3 Identify and flag surface and aerial utilities.

3.1.4 Notify utility company to remove and relocate utilities.

3.1.5 Maintain and protect existing utilities remaining which pass through work area.

3.2 EXCAVATION:

3.2.1 Excavate subsoil required for building foundations, construction operations and other work.

3.2.2 Machine slope banks to angle of repose or less until shored.

3.2.3 Excavation shall not interfere with normal 45 degree bearing splay of any foundation.

02215-3

3.2.4 Hand trim excavation and leave free of loose matter.

3.2.5 Remove lumped subsoil, boulders and rock up to 1/3 cubic yard measured by volume.

3.2.6 Correct unauthorized excavation.

3.2.7 Fill over-excavated areas under structure bearing surfaces.

3.2.8 Remove excess subsoil not being reused from site.

3.3 EXCESS WATER CONTROL:

3.3.1 Do not place, spread or roll any fill material during

unfavorable weather conditions. Do not resume operations until moisture content and fill density are satisfactory to the Contracting Officer.

3.3.2 Where soil has been softened or eroded by flooding or

placement during unfavorable weather, remove all damaged areas and recompact as specified for fill and compaction.

3.3.3 Provide and maintain at all times during construction, ample means and devices with which to promptly remove and dispose of all water from every source entering the excavation or other parts of the work.

3.3.4 Dewater by means which will ensure the preservation of final line and grades of bottoms of excavations.

3.4 FIELD QUALITY CONTROL:

3.4.1 Provide for visual inspection of bearing surfaces.

02220-1

SECTION 02220

BACKFILLING

1.1.1 Site backfilling.

1.1.2 Fill under slabs-on-grade.

1.1.3 Compaction requirements.

2. PRODUCTS:

2.1 SELECT FILL MATERIALS:

2.1.1 Type A - Coarse Gravel: Pit run, washed natural stone; free of shale, clay, friable materials and debris; graded in accordance with ANSI/ASTM C136 within the following limits:

Sieve Size Percent Passing

2 inch 100 1 inch 95 3/4 inch 95 to 100 5/8 inch 75 to 100 3/8 inch 55 to 85 No. 4 35 to 60 No. 16 15 to 35 No. 40 10 to 25 No. 200 5 to 10

2.1.2 Type B - Pea Gravel: Natural stone; washed, free of clay, shale, organic matter; 1/4 inch minimum to 5/8 inch maximum size;

graded in accordance with ANSI/ASTM C136.

2.1.3 Type C - Sand: Natural river or bank sand; washed, free of silt, clay, loam, friable or soluble materials, and organic matter;

graded in accordance with ANSI/ASTM C136.

2.2 COMMON FILL MATERIALS:

02220-2

2.2.1 Subsoil: Reused, free of gravel larger than three inch size and debris.

3. EXECUTION:

3.1 INSPECTION:

3.1.1 Verify stockpiled fill to be reused is approved.

3.1.2 Verify areas to be backfilled are free of debris, snow, ice or water and ground surfaces are not frozen.

3.2 PREPARATION:

3.2.1 When necessary, compact subgrade surfaces to density

requirements for backfill material.

3.2.2 Cut out soft areas of subgrade not readily capable of

compaction. Backfill with subsoil and compact to density equal to requirements for subsequent backfill material.

3.3 BACKFILLING:

3.3.1 Backfill areas to contours and elevations. Use unfrozen materials.

3.3.2 Backfill systematically, as early as possible, to allow maximum time for natural settlement. Do not backfill over porous, wet or spongy subgrade surfaces.

3.3.3 Place and compact select fill materials in continuous layers not exceeding eight inches loose depth.

3.3.4 Place and compact common fill material in continuous layers not exceeding 12 inches loose depth.

3.3.5 Employ a placement method so not to disturb or damage

foundation waterproofing and protective cover.

3.3.6 Maintain optimum moisture content of backfill materials to attain required compaction density.

3.3.7 Backfill against supported foundation walls. Backfill

simultaneously on each side of unsupported foundation walls.

3.3.8 Slope grade away from building minimum two inches in 10 feet unless noted otherwise.

02220-3

3.3.9 Make changes in grade gradual. Blend slopes into level areas.

3.3.10 Remove surplus backfill materials from site.

3.3.11 Leave stockpile areas completely free of excess fill

materials.

3.4 TOLERANCES:

3.4.1 Top Surface of Backfilling: Plus or minus one percent.

02221-1

SECTION 02221

TRENCHING

1.1.1 Excavate trenches for utilities.

1.1.2 Compacted bed and compacted fill over utilities (to subgrade elevations).

1.1.3 Compaction requirements.

1.2 TESTS:

1.2.1 Tests and analysis of fill materials shall be performed in accordance with ANSI/ASTM D698.

1.2.2 Compaction tests shall be performed in accordance with

ANSI/ASTM D1556.

1.3 REFERENCES:

1.3.1 ANSI/ASTM C136 - Sieve Analysis of Fine and Coarse Aggregates.

1.3.2 ANSI/ASTM D698 - Tests for Moisture-Density Relations of Soils and Soil-Aggregate Mixture Using 5.5 pound Rammer and 12 inch Drop.

1.3.3 ANSI/ASTM D1556 - Density of Soil in Place by Sand-Cone Method.

1.4 PROTECTION:

1.4.1 Protect excavations by shoring, bracing, sheet piling, underpinning or other methods required to prevent cave-in or loose soil from falling into excavation.

1.4.2 Underpin adjacent structures which may be damaged by

excavation work, including service utilities and pipe chases.

02221-2

1.4.3 Notify Contracting Officer of unexpected subsurface conditions and discontinue work in affected area until notification to resume work.

1.4.4 Protect bottom of excavations and soil adjacent to and beneath foundations from frost.

1.4.5 Grade excavation top perimeter to prevent surface water run-off into excavation.

2. PRODUCTS:

2.1 SELECT BED AND FILL MATERIALS:

2.1.1 Type A - Coarse Stone: Washed natural stone; free of shale, clay, friable materials and debris; graded in accordance with ANSI/ASTM C136 within the following limits:

Sieve Size Percent Passing 2 inch 100 1 inch 95 3/4 inch 95 to 100 5/8 inch 75 to 100 3/8 inch 55 to 85 No. 4 35 to 60 No. 16 15 to 35 No. 40 10 to 25

2.1.2 Type B - Pea Gravel: Natural stone, washed free of clay, shale, organic matter; 1/4 inch minimum to 5/8 inch maximum size graded in accordance with ANSI/ASTM C136.

2.1.3 Type C - Sand: Natural river or bank sand; washed free of silt, clay, loam, friable or soluble materials and organic matter;

graded in accordance with ANSI/ASTM C136 within the following limits.

Sieve Size Percent Passing No. 4 100 No. 14 10 to 100 No. 50 5 to 90 No. 100 4 to 30 No. 200 0

2.2 COMMON FILL MATERIALS:

2.2.1 Subsoil: Reused free of gravel larger than three inch size and debris.

02221-3

2.3 PLASTIC MARKING TAPE: Warning tape shall be of the type specifically manufactured for marking and locating underground utilities. The tape shall be installed directly above the pipe, at a depth of 18 inches below finished grade unless otherwise shown. The tape shall be acid- and alkali-resistant polyethylene film, six inches wide with minimum thickness of 0.004 inch and shall have a minimum strength of 1750 psi lengthwise and shall be as specified in Table 1 and shall bear a continuous printed inscription describing the specific utility.

Table 1. Tape Color

Red: Electric Yellow: Gas, Oil, Dangerous Materials Orange: Telephone, Telegraph, Television, Police, and Fire Communications Blue: Water Systems Green: Sewer Systems

Tape for all nonmetallic utility lines shall have integral wires, foil backing, or other means to enable detection by a metal detector when the tape is buried up to three feet deep. The metallic core shall be encased in a protective jacket or provided with other means to protect it from corrosion.

3. EXECUTION:

3.1 PREPARATION:

3.1.1 Verify areas to be backfilled are free of debris, snow, ice or water and surfaces are not frozen.

3.1.2 Identify required lines, levels, contours and datum.

3.1.3 When necessary, compact subgrade surfaces to density

requirements for backfill material.

3.2 EXCAVATION:

3.2.1 Excavate subsoil required for sanitary sewer and water piping.

3.2.2 Cut trenches sufficiently wide to enable installation of utilities and allow inspection.

3.2.3 Hand trim excavation and leave free of loose matter.

3.2.4 Remove lumped subsoil, boulders and rock.

02221-4

3.2.5 Correct unauthorized excavation at no cost to Government.

3.2.6 Fill over-excavated areas under pipe bearing surfaces to same density as adjacent soil.

3.2.7 Stockpile excavated material in area designated on site and remove excess subsoil not being reused from site.

3.3 BACKFILLING:

3.3.1 Support pipe during placement and compaction of bedding fill.

3.3.2 Place and compact select fill materials in continuous layers not exceeding eight inches loose depth.

3.3.3 Maintain optimum moisture content of backfill materials to attain required compaction density.

3.3.4 Remove surplus backfill materials from site.

3.3.5 Leave stockpile areas completely free of excess fill

materials.

3.4 DE-WATERING: The Contractor shall provide and maintain adequate de-watering equipment to remove and dispose of all surface and groundwater entering excavations, trenches, or other parts of the work. Each excavation shall be kept dry during subgrade preparation and continually thereafter until the structure to be built, or the pipe to be installed, therein is completed to the extent that no damage from hydrostatic pressure, flotation, or other cause will result. All excavations for concrete structures or trenches which extend down to or below groundwater shall be de-watered by lowering and keeping the groundwater level beneath such excavations 12 inches or more below the bottom of the excavation.

Surface water shall be diverted or otherwise prevented from entering excavated areas or trenches to the greatest extent practicable without causing damage to adjacent property. Existing drainage facilities may be used for disposal of surface and groundwater during de-watering operations subject to prior approval of the Contracting Officer. The Contractor shall be responsible for all damages incurred to the drainage facilities as a result of the de-watering operations. All pipes or conduits shall be left clean and free of sediment.

3.5 COMPACTION:

Percent CE 55 Maximum Density

3.5.1 Backfill Under Slabs and Paved Areas 95%

02221-5

3.5.2 All Other Areas 85%

3.5.3 Testing: Testing shall be the responsibility of the

Contractor and shall be performed at no additional cost to the Government. Testing shall be performed by a commercial testing laboratory. Field in-place density shall be determined in accordance with MIL-STD-621, Method 106. For every 50 lineal feet of installation, one passing density test shall be taken for each lift and compaction process. Any approved compacted layers that are disturbed by the Contractor's operations shall be recompacted, as specified herein before, to the required density prior to further construction thereon.

3.6 SITE GRADING AND SEEDING: In grass areas, the last four inches of fill in the trench shall be topsoil. It shall be spread level with the existing ground surface and of a fine enough texture to support seed growth. Soil lumps larger than two inches shall be broken up. Topsoil shall also be spread along the edges of the new sidewalks in all areas where the existing grass has been destroyed by construction under this contract. Grass seed shall then be planted on all new topsoil areas and all existing grass areas that have been disturbed, see Section 02485 Seeding.

02265-1

SECTION 02265

LANDSCAPE GRADING

1.1.1 Finish grade subsoil.

1.1.2 Place, level and compact topsoil.

1.2 RELATED WORK:

1.2.1 Section 02210 - Site Grading

1.2.2 Section 02220 - Backfilling

1.2.3 Section 02485 - Seeding

1.3 PROTECTION:

1.3.1 Protect landscaping and other features remaining as final work.

1.3.2 Protect existing structures, fences, roads, sidewalks, paving and curbs.

2. PRODUCTS:

2.1 MATERIALS:

2.1.1 Topsoil: Reused.

3. EXECUTION:

3.1 INSPECTION:

3.1.1 Verify site conditions and note irregularities affecting work of this Section.

3.1.2 Beginning work of this Section means acceptance of existing conditions.

02265-2

3.2 SUBSOIL PREPARATION:

3.2.1 Eliminate uneven areas and low spots. Remove debris, roots, branches, and stones in excess of 1/2-inch in size. Remove subsoil contaminated with petroleum products.

3.2.2 Scarify subgrade to depth of 3 inches where topsoil is

scheduled. Scarify in areas where equipment used for hauling and spreading topsoil has compacted subsoil.

3.3 PLACING TOPSOIL:

3.3.1 Place topsoil in areas where seeding is scheduled.

3.3.2 Use topsoil in relatively dry state. Place during dry

weather.

3.3.3 Fine grade topsoil eliminating rough or low areas. Maintain levels, profiles and contours of subgrade.

3.3.4 Remove stone, roots, grass, weeds, debris and foreign material while spreading.

3.3.5 Manually spread topsoil around trees and building to prevent damage.

3.3.6 Lightly compact placed topsoil.

3.3.7 Remove surplus subsoil and topsoil from site.

3.3.8 Leave stockpile area and site clean and raked, ready to receive landscaping.

3.4 TOLERANCES:

3.4.1 Top of Topsoil: Plus or minus one percent.

3.5 SCHEDULE OF LOCATIONS:

3.5.1 The following paragraphs identify compacted topsoil

thicknesses for various locations.

3.5.2 Seeded Grass: Six inches.

02485-1

SECTION 02485

SEEDING

1.1.1 Seeding and fertilizing.

1.1.2 Hydroseeding.

1.1.3 Maintaining seeded areas until acceptance.

1.2 DELIVERY, STORAGE AND HANDLING:

1.2.1 Deliver grass seed in original containers showing analysis of seed mixture, percentage of pure seed, year of production, net weight, date of packaging and location of packaging. Damaged packages are not acceptable.

1.2.2 Deliver fertilizer in waterproof bags showing weight, chemical analysis, and name of manufacturer.

1.2.3 Weed killer (herbicide) shall be delivered to the site in the original, unopened containers bearing legible labels indicating the Environmental Protection Agency (EPA) registration number and the manufacturer's registered uses. All herbicides shall have the label fully displayed at all times. The Contractor shall comply with all applicable parts of 29 Code of Federal Regulations (CFR) 1910 and 20 CFR 1915 to assure safe working conditions for contract personnel and a safe environment for occupants of Air Force facilities. The Contractor shall dispose of all empty herbicide containers and other non-reusable material off of Minot AFB in accordance with D.E.R.

Regulations.

1.3 EXISTING CONDITIONS:

1.3.1 Beginning work means acceptance of existing conditions.

1.4 SUBMITTALS:

1.4.1 Herbicide Data: Contractor shall submit weed killer

(herbicide) name, chemical composition, formulation, EPA registration

02485-2 and registered uses, concentration, application rate of active ingredients and method of application for the weed killer proposed for use in this project.

1.4.2 Certifications: If the Contractor proposes to use a herbicide that has been classified by the EPA for restricted use, the Contractor shall submit proof that supervisory personnel and personnel who work without supervision employed on this contract have current State of North Dakota certification (under Public Law 92-516 as amended) for the type of application to be used in this contract.

The Contractor shall also show that he is in compliance with all licensing and registration procedures required by state law.

2. PRODUCTS:

2.1 GROWING MEDIA:

2.1.1 Imported Topsoil: Natural, fertile, agricultural soil typical of locality, capable of sustaining vigorous plant growth, from well drained site free of flooding, not in frozen or muddy condition, not less than 6% organic matter, and pH value of 5.9 to 7.0. Free from subsoil, slag, clay, stones, lumps, live plants, roots, sticks, crabgrass, coughgrass, noxious weeds and foreign matter.

2.1.2 Existing Topsoil: Natural, fertile agricultural soil capable of sustaining vigorous plant growth, not in frozen or muddy condition, containing not less than 6% organic matter, and corrected to pH value of 5.9 to 7.0. Free from subsoil, slag, clay, stones, lumps, live plants, roots, sticks, crabgrass, coughgrass, noxious weeds and foreign matter.

2.1.3 Fertilizer: Fertilizer shall be commercial grade, free

flowing, uniform in composition, delivered in fully labeled sealed containers, and shall conform to applicable state and federal regulations. Granular fertilizer shall conform to Fed. Spec. 0-F- 241, Type I, Level B, and shall bear the manufacturer's guaranteed statement of analysis. Granular fertilizer shall contain a minimum percentage by weight of 12 nitrogen, (IBDU) 12 phosphorus and 12 potassium. Slow release nitrogen shall be derived from isobutylenediurea.

2.2 SEED: The mixture of each seed lot shall contain the following pounds of pure live seed per 1000 s f:

Pounds Pure Seed Type Live Seed per 1000 S.F.

02485-3

Field Seeding Fairway Crested Wheat Grass 4 Kentucky Bluegrass 2 Total pounds pure live seed per 1000 S.F. 6

The following formula shall be used to determine the amount of commercial seed required to provide in each kind of seed the specified quantities of pure live seed, with Purity and Germination expressed as whole numbers:

Pure Live Seed x 100 x 100 = Pounds Commercial Purity x Germination Seed Required

2.3 ACCESSORIES:

2.3.1 Mulch: Material shall be either straw or wood cellulose fiber.

2.3.2 Straw Mulch: Material shall be straw containing no viable seed or noxious weeds. Straw shall be harvested stalks of oats, wheat, rye or rice, 50 percent of which by weight shall be ten (10) inches long or longer, containing sufficient moisture to permit anchoring in soil without breaking. Dry, brittle material shall be moistened in advance of spreading.

2.3.3 Wood cellulose fiber mulch shall be used only for hydraulic application in slurry form. It shall be made of natural wood cellulose fibers and contain a ready-mixed tackifier both of which shall be harmless to vegetative growth. The mulch shall be dyed an appropriate color to facilitate metering of the material in order to show where application has been made. When hydraulically applied, the material shall form a uniform, blotter-like ground cover that absorbs subsequent watering and permits percolation of moisture to underlying soil. The wood fiber shall be delivered in dry, compressed form in sealed containers showing dry weight and conforming to the laws of the state in which it is to be used, and bearing the name, trade name, and warranty of the producer. Material shall be the product of a firm regularly engaged in the manufacture of wood cellulose fiber mulch. Composition of dry, compressed material shall be such that mixing to slurry consistency in water may be readily accomplished.

2.3.4 Herbicides, Insecticides, Fungicides and Other Pesticides:

Use of pesticides must comply with all applicable state and federal laws. Pesticides must be registered with the U.S. Environmental Protection Agency and applied by a certified applicator and in accordance with the label's requirements. A contract inspection must be performed per DOD requirements. Weed killer (herbicide) shall be

02485-4 an EPA registered herbicide, suitable for the purpose. Contractor shall submit data on the herbicide as required by paragraph, SUBMITTALS, for approval. The Contractor shall only use a herbicide approved by the Contracting Officer.

2.3.5 Establishment Blanket: Uniform, open weave jute matting.

3. EXECUTION:

3.1 PREPARATION:

3.1.1 Protect existing underground improvements from damage.

3.1.2 Remove foreign materials, plants, roots, stones and debris from site. Do not bury foreign material.

3.1.3 Remove contaminated subsoil.

3.1.4 Cultivate to depth of three (3) inches (75 mm) area to receive topsoil. Repeat cultivation areas where equipment has compacted subgrade.

3.2 SPREADING TOPSOIL:

3.2.1 Spread topsoil to depth of four (4) inches over area to be seeded. Place during dry weather and on dry unfrozen subgrade.

3.2.2 Cultivate topsoil to depth of four (4) inches with mechanical tiller. Cultivate inaccessible areas by hand. Rake until surface is smooth.

3.2.3 Remove from site, foreign materials collected during

cultivation.

3.2.4 Grade to eliminate rough spots and low areas where ponding may occurs. Maintain smooth, uniform grade.

3.2.5 Assure positive drainage away from buildings.

3.2.6 Finish ground level firm and sufficient to prevent sinkage pockets when irrigation is applied.

3.3 FERTILIZING:

3.3.1 Apply fertilizer at a rate of 10 pounds per 1,000 square feet (4.5 kilograms per 100 square meters).

02485-5

3.3.2 Do not apply grass seed and fertilizer at same time, in same machine.

3.3.3 Lightly water to aid breakdown of fertilizer and to provide moist soil for seed.

3.4 SEEDING:

3.4.1 Apply seed at a rate of six pounds per 1,000 square feet evenly in two intersecting directions. Rake in lightly.

3.4.2 Do not sow immediately following rain, when ground is too dry, or during windy periods.

3.4.3 Roll seeded area with roller not exceeding 112 pounds

(50 kilograms).

3.4.4 Apply water with fine spray immediately after each area has been sown.

3.5 HYDROSEEDING:

3.5.1 Apply slurry at rate of six pounds per 1,000 square feet evenly in two intersecting directions and with hydraulic seeder.

3.5.2 Immediately following hydroseeding, mulch areas by means of mulch blower at rate of 1,200 pounds per acre on level grade, 2,000 pounds on slopes.

3.5.3 Do not seed area in excess of that which can be mulched on same day.

3.6 HYDRO-MULCHING:

3.6.1 Hydro-Mulch. The mulch shall be uniformly applied at a rate of one ton per acre and shall cover a minimum of 95 percent of the seedbed area. After application, the mulch shall permit percolation of water to the underlying soil.

3.7 SEED PROTECTION ON SLOPES:

3.7.1 Cover seeded slopes where grade is 3:1 or greater with jute matting. Roll matting down over slopes without stretching or pulling.

3.7.2 Lay matting smoothly on soil surface, burying top end of each section in narrow six inch trench. Leave 12 inches overlap from top

02485-6 roll over bottom roll. Leave four inches overlap over adjacent section.

3.7.3 Staple outside edges and overlaps at 36 inch intervals.

3.7.4 Lightly dress slopes with topsoil to ensure close contact between matting and soil.

3.7.5 In ditches, unroll matting in direction of flow. Overlap ends of strips six (6) inches with upstream section on top.

3.8 MAINTENANCE PERIOD:

3.8.1 Maintenance Period: A minimum of 30 days until final

acceptance of the project.

3.9 ESTABLISHMENT AND MAINTENANCE:

3.9.1 General: The Contractor shall be responsible for the

establishment and proper maintenance of seeded areas. Work shall include watering, mowing, weed eradication, protection of embankments and ditches from erosion, and the maintenance of the mulch covering.

3.9.2 Stand of Grass: The Contractor shall produce a stand of the specified grass that shall be alive, growing and healthy at the end of the maintenance period. Bare spots shall not exceed 4 percent of the total area seeded. Areas on which these requirements are not met shall be reseeded as required by the Contracting Officer until a stand of grass is produced. The maintenance period shall be extended until the density requirements are met.

3.9.3 Watering: Areas shall be watered frequently, by the

Contractor, to promote seed germination. Watering equipment and water shall be furnished by the Contractor of a type that will not damage finished grades. Watering shall be provided at such intervals and at such rates that wilting, puddling, and runoff do not occur. As turf develops, the frequency of waterings may be reduced and quantities increased as growth and moisture requirements dictate.

3.9.4 Mowing: The seeded areas shall be mowed to a height of

4 inches whenever the average height of grass becomes 6 inches. When the amount of cut mowed grass is heavy, it shall be removed to prevent destruction of the underlying turf. If weeds or other undesirable vegetation threaten to smother the planted species, such vegetation shall be uprooted and removed from the area.

02485-7

3.9.5 Weed Killer: Apply weed killer when…

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