22r19-CDC AMR-Am-0006.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

1. CONTRACT ID CODE

J

PAGE OF PAGES

1 2

2. AMENDMENT/MODIFICATION NO.

Am-0006

3. EFFECTIVE DATE

15-Aug-2023

4. REQUISITION/PURCHASE REQ. NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY CODE W9128A 7. ADMINISTERED BY (If other than item 6) CODE

CONTRACTING DIVISION

BLDG 230 OTAKE ST.

FORT SHAFTER HI 96858

See Item 6

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X

9A. AMENDMENT OF SOLICITATION NO.

W9128A22R0019

X 9B. DATED (SEE ITEM 11)

22-Jun-2022

10A. MOD. OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 13)

CODE FACILITY CODE

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE

RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN

REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

FY22 MCA PN 96540 Child Development Center, Aliamanu Military Reservation, Oahu, Hawaii

See Continuation Page.

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print) 16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

TEL: EMAIL:

15B. CONT RACT OR/OFFEROR

(Signature of person authorized to sign)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA

BY

(Signature of Contracting Officer)

16C. DATE SIGNED

EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

30-105-04 STANDARD FORM 30 (Rev. 10-83)

Prescribed by GSA

FAR (48 CFR) 53.243

W9128A22R0019 Am-0006

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

1. CHANGES TO SPECIFICATIONS. Attached hereto are revised pages/paragraphs to the specifications. The revision mark “(Am-0006)” is shown on each revised page.

a. REVISED SECTIONS. The following are revised pages to the solicitation. Changes are bold.

Section 32 05 33, revised text in para 2.4.

b. NEW SECTIONS. The following are new pages to the solicitation.

Section 00 60 00, Appendix A - Requests for Information (#97 to 118)

c. REPLACED SECTION. The following section is replaced in its entirety:

Section 32 05 33, Landscape Establishment

Section 32 32 23.13, Segmental Concrete Block Retaining Wall

d. DELETED SECTION. The following sections are to be deleted in its entirety:

N/A

2. CHANGES TO DRAWINGS

a. REVISED DRAWINGS. The following revised drawings replace like-numbered drawings and are issued herewith:

Sheet ID Mark Revision Date

L-001 6 8/10/2022

L-001A 6 8/10/2022

S-606 6 8/11/2022

S-607 6 8/11/2022

S-608 6 8/11/2022

S-611 6 8/11/2022

3. The proposal due date and time remains unchanged.

FY22 PN 096540 Child Development Center Aliamanu Military Reservation

W9128A22R0019

RFI # Question Response

Reference is made to drawing sheets A-505 and S-606.

The wall elevation shown on B6/A-505 shows vertical lines spaced at 4’-0” on center along the length of the wall. There is also a horizontal line shown equally spaced at 10’-0” on center from bottom to top of wall.

Are these recessed reveals, construction joints, and/or control joints so that the walls can be constructed in sections?

See Am-0005, Sheets S-606 and S-607.

These lines indicate 4'x10' typical formliner panel sizes for informational purposes only.

Reference is made to drawing sheets A-505 and S-606.

Please note the horizontal line that runs through the raised concrete ribs.

We believe that this would be a construction joint so that the concrete wall formwork can be lifted for the second pour above the first. It is impractical to put a construction joint where there are concrete ribs formed by a liner in the formwork. The industry practice would be to create a discontinuity in the ribs with a smooth band so that construction joints and steel ties which hold the formwork together can be located. The smooth band “wave” pattern makes it impractical and very costly to build this wall. With consideration to the foregoing, would the architectural finish and pattern of the exposed concrete retaining walls be reconsidered?

No. These lines indicate 4’x10’ typical formliner panel sizes for informational purpose only.

Reference is made to drawing sheets A-505 and S-606.

Are there requirements for expansion joints along the lengths of these walls?

See Am-0006, Sheet E7/S-606.

Expansion joints are labeled as control joints.

Per 08 34 70 -3.3.1. door assemblies are to be provided that are identical to those tested at an independent acoustical laboratory…in accordance with ASTM E90 and ASTM E413. However, per 3.3, third party testing in accordance with ASTM E336 are to be provided.

Please confirm, that no field testing is required (ASTM E336), when identical assemblies are provided (per para 3.3.1).

Confirmed.

Section 00 60 00, Appendix A, Requests for Information - 1 (Am-0006)

W9128A22R0019

RFI # Question Response

Drawing Reference: CG102, CG202, S-608. Spec 03 30 00. The retaining wall B, Sta 1+50 (approx.) to Sta 1+85.00 the height of wall are above 24’ (max wall height in the retaining wall schedule on S-608).

Please provide information for wall heights over 24’.

See Am-0006, Sheets detail A1 on S-607 and S-608. The "H" dimension is from top of footing to top of upper finish grade.

These details also indicate 6" min from top of upper finish grade to top of wall. Refer to civil drawings for top of retaining wall elevations.

Drawing S-611 calls for 28” precast block for the MSE retaining wall.

Drawing S-306 shows these blocks to be approximately 46” wide by 18” high, which equates to 5.75 square feet of face area per block.

Specification section 32 32 23.13 paragraph 2.2.1.4 lists the minimum block size as 2/3 square feet of face area, and a minimum 6 inch height.

Please confirm if the 28” precast block is required or if the minimum size listed in the specifications is all that is required.

Comply with block minimum dimensions per Am-0006, Section 32 32 23.13, para 2.2.1.4 See Am-0006, Sheet A1/S-611 for clarification of the 28" dimension

Section 33 11 00, paragraph 3.1.d requires to submit DSO grade 3 certification and plumbing license. Plumbing contractors will install plumbing lines inside of building, up to the 5’ outside of building and site civil water system is only up to 5’ out of the building line. Please clarify if DSO certification and plumbing license are required for the site water system.

Comply with Section 33 11 00, para 3.1.d

D1/S302 indicates that the embankment under the building with structural fill. Please clarify only the structural fill material will be utilized under the building even the embankment depth at certain area is more than 15’.

Provide structrual fill material under the builiding per D1/S-302 and A1/S- 602.

Concrete Retaining Wall A, S-607 & CG201. RW footing details/S607 shows min 1’ cover from BW grade. CG201 RW A profile shows that the slope of finish grade at some area are, 33.46%, 16.89%, 8.23% or 8.17%, so these area will require multiple RW step footings and the RW height will be change pending the step footing elevations. Please provide a profile for the RW A footings.

Multiple steps will be necessary. See Am-0006, Sheet C7/S-606 for footing detail and parameters for determining step footing locations.

Section 00 60 00, Appendix A, Requests for Information - 2

W9128A22R0019

RFI # Question Response

A1/S611 refers to spec for the leveling pad and Spec 32 32 23.13, Para

2.3.1.2 calls out gradation C. Please provide spec for gradation C material.

See Am-0006, Section 32 32 23.13 para 2.3.1.2

A1/S611 states “RETAINED SOIL (onsite soil or compacted general backfill), but Spec 32 32 23.13, Para 2.3.1.4 call out granular material with less than 15% passing #200 sieve. Please clarify.

See Am-0006, Sheet S-611.

Playground fence shall be 4.5’ high and site fence & other fence shall be 6’high. Please confirm.

Confirmed.

Playground fence/gate materials will be PVC coated chain link, while site fence & other fence will be Galvanized material. Please confirm.

Confirmed.

Spec section 2.2.1 indicates Playground fence to be 1-1/4” mini mesh PVC coated, while site fence will 2” standard galvanized chain link mesh fabric. Please confirm.

Confirmed.

MSE retaining wall specs and drawings conflict – the drawings show a 4’ x 1.5’ block. The specs seem to indicate a 1.5’ wide x 8” high block is desired. Please confirm which size is desired.

See Am-0006, Response to RFI #102

A Portion of the planting plan on Sheet L-103 shows grading lines with no designated planting. Is there planting in the areas or is this area shear rock to be left as is without planting?

This area will be regraded, cut shear rock face so no planting is needed.

The groundcover Kawelu is designated to be planted with 4” pots 24” O.C.

on sheet L-001 planting legend. Is this spacing correct? It seems a bit far apart for clumping grass.

See Am-0006, Sheets L-001 and L-001A.

Section 00 60 00, Appendix A, Requests for Information - 3

W9128A22R0019

RFI # Question Response

Specification section 32 05 33 Plant Establishment page 6, 2.4 Pesticides

– states they are not permitted. Is it possible to grant a variance for the use of a pre-emergent herbicide (Ronstar G) that would be applied directly after planting to mitigate weed infestation during plant establishment only?

Maintenance costs would be significantly reduced.

See Am-0006, section 32 05 33, para 2.4

Spec section 09 90 00, part 1.5.3 requires SSPC QP1 certification for steel prep and painting. Please confirm certified is required or if it can be eliminated to help encourage Small Business Participation.

This requirement was deleted. See Am-0001, Section 09 90 00.

Playground Fence shall be 4.5’ high and site fence and other fence shall be 6’ high. Please confirm.

See Am-0006, Response to RFI #108

Playground fence/gate materials will be PVC coasted chain link, while site fence and other fence will be galvanized material. Please confirm.

See Am-0006, Response to RFI #109

Spec section 32 31 13, para 2.2.1 indicated playground fence to be 1-¼" mini mesh PVC coated, while site fence will 2” standard galvanized chain link mesh fabric. Please confirm.

See Am-0006, Response to RFI #110

Section 00 60 00, Appendix A, Requests for Information - 4

FY21 PN96540 CHILD DEVELOPMENT CENTER, AMR

SECTION TABLE OF CONTENTS

DIVISION 32 - EXTERIOR IMPROVEMENTS

SECTION 32 05 33

LANDSCAPE ESTABLISHMENT

PART 1 GENERAL

1.1 REFERENCES

1.2 DEFINITIONS

1.2.1 Pesticide

1.2.2 Stand of Turf

1.2.3 Planter Beds

1.3 RELATED REQUIREMENTS

1.4 SUBMITTALS

1.5 DELIVERY, STORAGE AND HANDLING

1.5.1 Delivery

1.5.2 Storage

1.5.2.1 Fertilizer, Lime, Iron, and Mulch Storage

1.5.2.2 Antidesiccant's Storage

1.5.3 Handling

1.6 MAINTENANCE

PART 2 PRODUCTS

2.1 POST-PLANT FERTILIZER

2.1.1 Granular Fertilizer

2.2 WATER

2.3 MULCHES TOPDRESSING

2.3.1 Organic Mulch Materials

2.3.2 Recycled Organic Mulch

2.4 PESTICIDES

PART 3 EXECUTION

3.1 EXTENT OF WORK

3.1.1 Policing

3.1.2 Drainage System Maintenance

3.2 IRRIGATION ESTABLISHMENT PERIOD

3.2.1 Maintenance During the Irrigation Establishment Period

3.2.2 Water Restrictions

3.2.3 Fire Hydrants

3.2.4 Final Acceptance

3.2.5 Controller Charts

3.3 GROUNDCOVER ESTABLISHMENT PERIOD

3.3.1 Frequency of Maintenance

3.3.2 Promotion of Growth

3.3.3 Mowing

3.3.3.1 Turf

3.3.3.2 Native Grasses

3.3.4 Turf Edging and Trimming

3.3.5 Post-Fertilizer Application

SECTION 32 05 33 Page 1

3.3.6 Turf Watering

3.3.7 Turf Aeration

3.3.8 Turf Clearance Area

3.3.9 Replanting

3.3.10 Final Inspection and Acceptance

3.3.11 Unsatisfactory Work

3.4 EXTERIOR PLANT ESTABLISHMENT PERIOD

3.4.1 Frequency of Maintenance

3.4.2 Promotion of Plant Growth and Vigor

3.4.3 Planter Bed Maintenance

3.4.3.1 Shrub Selective Maintenance

3.4.3.2 Tree Maintenance

3.4.4 Slope Erosion Control Maintenance

3.4.5 Removal of Dying or Dead Plants

3.4.6 Tracking of Unhealthy Plants

3.4.7 Final Inspection

3.4.7.1 Total Plants on Site

3.4.7.2 Mulching and Weeding

3.4.7.3 Tree Supports

3.4.7.4 Remedial Work

3.4.8 Unsatisfactory Work

3.5 FIELD QUALITY CONTROL

3.5.1 Maintenance Inspection Report

3.5.2 Plant Quantities

3.5.3 Tree Staking and Guying Removal

-- End of Section Table of Contents --

SECTION 32 05 33 Page 2

SECTION 32 05 33

LANDSCAPE ESTABLISHMENT

PART 1 GENERAL

1.1 REFERENCES

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

ASTM INTERNATIONAL (ASTM)

ASTM D5851 (1995; R 2015) Planning and Implementing a Water Monitoring Program

TREE CARE INDUSTRY ASSOCIATION (TCIA)

TCIA Z133 (2017) American National Standard for Arboricultural Operations - Pruning, Repairing, Maintaining, and Removing Trees, and Cutting Brush - Safety Requirements

1.2 DEFINITIONS

1.2.1 Pesticide

Any substance or mixture of substances, including biological control agents, that may prevent, destroy, repel, or mitigate pests and are specifically labeled for use by the U.S. Environmental Protection Agency (EPA). Also, any substance used as a plant regulator, defoliant, disinfectant, or biocide. Examples of pesticides include fumigants, herbicides, insecticides, fungicides, nematicides, molluscicides and rodenticides.

1.2.2 Stand of Turf

95 percent ground cover of the established species.

1.2.3 Planter Beds

A planter bed is defined as an area containing one or a combination of the following plant types: shrubs, vines, wildflowers, annuals, perennials, ground cover, and a mulch topdressing excluding turf. Trees may also be found in planter beds.

1.3 RELATED REQUIREMENTS

Section 32 84 24 IRRIGATION SPRINKLER SYSTEM applies to this section for installation of irrigation equipment requirements, with additions and modifications herein.

Section 32 92 26 SPRIGGING applies to this section for installation of seed requirements, with additions and modifications herein.

SECTION 32 05 33 Page 3

Section 32 93 00 EXTERIOR PLANTS applies to this section for installation of trees, shrubs, and ground cover with additions and modifications herein.

1.4 SUBMITTALS

Government approval is required for submittals with a "G" or "S" classification. Submittals not having a "G" or "S" classification are for Contractor Quality Control approval. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Integrated Pest Management Plan; G

SD-03 Product Data

Fertilizer; G

Mulches Topdressing

Organic Mulch Materials

SD-07 Certificates

Maintenance Inspection Report

Plant Quantities; G

SD-10 Operation and Maintenance Data

Maintenance

SD-11 Closeout Submittals

Tree Staking and Guying Removal

1.5 DELIVERY, STORAGE AND HANDLING

1.5.1 Delivery

Deliver fertilizer, gypsum, and iron to the site in original containers bearing manufacturer's chemical analysis, name, trade name, or trademark, and indication of conformance to state and federal laws. Instead of containers, fertilizer, and gypsum may be furnished in bulk with a certificate indicating the above information.

1.5.2 Storage

1.5.2.1 Fertilizer, Lime, Iron, and Mulch Storage

Store material in designated areas. Store lime and fertilizer in cool, dry locations away from contaminants.

1.5.2.2 Antidesiccant's Storage

Do not store with fertilizers or other landscape maintenance materials.

SECTION 32 05 33 Page 4

1.5.3 Handling

Do not drop or dump materials from vehicles.

1.6 MAINTENANCE

Submit Operation and Maintenance (O&M) Manuals for planting materials.

Include instructions indicating procedures during one typical year including variations of maintenance for climatic conditions throughout the year. Provide instructions and procedures for watering; promotion of growth, including fertilizing, pruning, and mowing; and integrated pest management. O&M Manuals must include pictures of planting materials cross referenced to botanical and common names, with a description of the normal appearance in each season.

Develop a water monitoring program for surface and ground water on the project site in accordance with ASTM D5851 and consistent with the water management program utilized during construction operations.

PART 2 PRODUCTS

2.1 POST-PLANT FERTILIZER

Fertilizer for groundcover, wildflowers, and grasses is not permitted.

Provide fertilizer for trees, plants, and shrubs as recommended by plant supplier, except synthetic chemical fertilizers are not permitted.

Fertilizers containing petrochemical additives or that have been treated with pesticides or herbicides are not permitted.

2.1.1 Granular Fertilizer

Organic, granular controlled release fertilizer containing the following minimum percentages, by weight, of plant food nutrients:

16 percent available nitrogen 16 percent available phosphorus 16 percent available potassium

2.2 WATER

Source of water must be approved by the Contracting Officer, and be of suitable quality for irrigation. Use collected storm water or graywater when available.

2.3 MULCHES TOPDRESSING

Free from noxious weeds, mold, pesticides, or other deleterious materials.

2.3.1 Organic Mulch Materials

Provide wood chips, or recycled wood chips from site when available.

2.3.2 Recycled Organic Mulch

Recycled mulch may include compost, tree trimmings, or pine needles with a gradation that passes through a 2-1/2 by 2-1/2 inch screen. Clean recycled mulch of all sticks a minimum one inch in diameter and plastic materials a minimum 3 inch length. The material must be treated to retard the growth of mold and fungi.

SECTION 32 05 33 Page 5 areas.

Sprinkler heads must direct water away from buildings and hard surfaced outages. Contractor must be responsible for winterization and startup.

Irrigati on controllers must be inspected and reprogrammed after power one day or more. Once the rain has subsided timers must be reactivated.

twelve h ours of continuous rainfall in one day or during rain storms of shut-off sensors must be turned off during periods of rain that exceed maintena nce promptly. Automatic controllers not equipped with rain week during the installation and establishment period and perform needed installe d and is functional. Inspect irrigation equipment at least once a Begin ma intenance immediately after irrigation equipment has been

3.2.1 Maintenance During the Irrigation Establishment Period

and is functional and must continue for a period of 365 days.

equipment furnished under this contract have been satisfactorily installed inspecti on by the Contracting Officer shows that the new irrigation The irri gation establishment period will commence on the date that

3.2 IRRIGATION ESTABLI SHMENT PERIOD

encroachment by vegetation.

and vegetation at all times. Edges of these channels must be clear of any basins. Open drainage channels are to be maintained free of all debris curb inlets, and yard drains. Remove grates and clear debris in catch water to flow unrestricted in swales, gutters, catch basins, storm drain Remove a ll obstructions from surface and subsurface drain lines to allow

3.1.2 Drainage System Ma intenance

promptly removed and disposed of at an approved disposal site.

must extend to both sides of fencing or walls. Collected debris must be paper, t rash, cigarette butts, garbage, rocks or other debris. Policing branches and limbs regardless of length or diameter, dead vegetation, Police all landscaped areas. Policing includes removal of leaves,

3.1.1 Policing

disturbe d by the Contractor's operations.

all areas inside or outside the limits of the construction that are all newl y installed landscape areas , unless indicated otherwise, and at fertilizing, watering, weeding, pruning, and stake and guy adjusting for cleaning and adjustments, mowing, edging, overseeding, aeration, Provide landscape construction maintenance to include irrigation equipment

3.1 EXTENT OF WORK

PART 3 EXECUTION

2.4 PESTICIDES

(Am-0006) SECTION 32 05 33 Page 6

Pesticides and herbicides are permitted. USAG-HI requires consultation with DPW pest management coordinator regarding the specific product selection, applicator license, and the reporting requirements after application. Submit an Integrated PestManagement Plan, including weed and pest management strategies. Use biological pestcontrols as approved in the Plan when possible.

3.2.2 Water Restrictions

Abide by state, local or other water conservation regulations in force during the establishment period. Automatic controller must be adjusted to comply with the water conservation regulations schedule.

3.2.3 Fire Hydrants

To use a fire hydrant for irrigation, obtain prior clearance from the Contracting Officer and provide the tools and connections approved for use on fire hydrants. If a fire hydrant is used, Provide a reduced pressure backflow preventer for each connection between hose and fire hydrant.

Backflow preventer used must be tested once per month by a certified backflow preventer tester.

3.2.4 Final Acceptance

Upon completion of the irrigation establishment period and final acceptance of groundcover and exterior plants, irrigation equipment within temporary establishment only irrigation areasmust be removed.For areas of permanent irrigation, operation and coverage test is acceptable if system operates through at least one complete cycle for areas to be irrigated and all leaks or repairs have been completed.

3.2.5 Controller Charts

Provide one chart for each controller supplied. Indicate in chart area controlled by the automatic controller. The chart is a reduction of the actual plans that will fit the maximum dimensions inside the controller housing. Use a black line print for the chart and a different pastel or transparent color to indicate each station zone of coverage. After chart is completed and approved for final acceptance, seal chart between two 20 mil pieces of clear plastic.

3.3 GROUNDCOVER ESTABLISHMENT PERIOD

Groundcover establishment period will commence on the date that inspection by the Contracting Officer shows that the new turf furnished under this contract has been satisfactorily installed to a 95 percent stand of coverage. The establishment period must continue for a period of 365 days.

3.3.1 Frequency of Maintenance

Begin maintenance immediately after turf has been installed . Inspect area once a week during the installation and establishment period and perform needed maintenance promptly.

3.3.2 Promotion of Growth

Maintain groundcover in a manner that promotes proper health, growth, natural color. Turf must have a neat uniform manicured appearance, free of bare areas, ruts, holes, weeds, pests, dead vegetation, debris, and unwanted vegetation that present an unsightly appearance. Mow, remove excess clippings, eradicate weeds, water, fertilize, overseed, aerate, topdress and perform other operations necessary to promote growth, as approved by Contracting Officer and consistent with approved Integrated Pest Management Plan. Remove noxious weeds common to the area from planting areas by mechanical means.

SECTION 32 05 33 Page 7

3.3.3 Mowing

3.3.3.1 Turf

Mow turf at a uniform finished height. Mow turfed areas to a minimum average height of 1 inch when average height of grass becomes 1-1/2 inches for year-round maintenance. The height of turf is measured from the soil. Perform mowing of turf in a manner that prevents scalping, rutting, bruising, uneven and rough cutting. Prior to mowing, all rubbish, debris, trash, leaves, rocks, paper, and limbs or branches on a turf area must be picked up and disposed. Adjacent paved areas must be swept/vacuumed clean.

3.3.3.2 Native Grasses

Do not mow native grasses.

3.3.4 Turf Edging and Trimming

Perimeter of planter bed edges, sidewalks, driveways, curbs, and other paved surfaces must be edged. Uniformly edge these areas to prevent encroachment of vegetation onto paved surfaces and to provide a clear cut division line between planter beds, turf, and ground cover. Edging is to be accomplished in a manner that prevents scalping, rutting, bruising, uneven and rough cutting. Perform edging on the same day that turf is mowed. Use of string line trimmers is permitted in "soft" areas such as an edge between turfgrass and a planter bed. Exercise care to avoid damage to any plant materials, structures, and other landscape features.

Trimming around trees, fences, poles, walls, irrigation valve boxes and other similar objects is to be accomplished to match the height and appearance of surrounding mowed turf growth. Trimming must be performed on the same day the turf's mowed. Care must be exercised to avoid "Girdling" trees located in turf areas. The use of protective tree collars on trees in turf areas may be utilized as a temporary means to avoid injury to tree trunks. At the end of the plant establishment period Contractor shall leave all protective tree collars in place.

3.3.5 Post-Fertilizer Application

Do not fertilize wildflowers, groundcover, and grasses. Apply turf fertilizer in a manner that promotes health, growth, vigor, color and appearance of cultivated turf areas. The method of application, fertilizer type and frequencies must be determined by the laboratory soil analysis results the requirements of the particular turf species. Organic fertilizer must be used. In the event that organic fertilizer is not producing the desired effect, the Contractor must contract the Contracting Officer for approval prior to the use of a synthetic type of fertilizer.

Apply fertilizer by approved methods in accordance with the manufacturer's recommendations.

3.3.6 Turf Watering

Perform irrigation in a manner that promotes the health, growth, color and appearance of cultivated vegetation and that complies with all Federal, State, and local water agencies and authorities directives. The Contractor must be responsible to prevent over watering, water run-off, erosion, and ponding due to excessive quantities or rate of application.

Abide by state, local or other water conservation regulations or restrictions in force during the establishment period. Adjust irrigation

SECTION 32 05 33 Page 8 controllers to comply with the water conservation regulations schedule.

3.3.7 Turf Aeration

Upon completion of weed eradication operations and Contracting Officer's approval to proceed, aerate turf areas by approved device. Core, by pulling soil plugs, to a minimum depth of 4 inches. Leave all soil plugs that are produced in the turf area. Keep clean at all times at least one paved pedestrian access route and one paved vehicular access route to each building. Clean all soil plugs off of other paving when work is complete. This work must commence 20 days prior final acceptance of the maintenance establishment period.

3.3.8 Turf Clearance Area

Trees located in turf areas must be maintained with a growth free clearance of 18 inches from the tree trunk base. The use of mechanical weed whips to accomplish the turf growth free bed area is prohibited.

3.3.9 Replanting

Replant areas which do not have a satisfactory stand of turf. Replant areas which do not have a satisfactory stand of other groundcover and grasses.

3.3.10 Final Inspection and Acceptance

Final inspection will be make upon written request from the Contractor at least 10 days prior to the last day of the turf establishment period.

Final turf acceptance will be based upon a satisfactory stand of turf.

Final acceptance of wildflower and grass areas will be based upon a stand of 95 percent groundcover of established species.

3.3.11 Unsatisfactory Work

When work is found to not meet design intent and specifications, maintenance period will be extended at no additional cost to the Government until work has been completed, inspected and accepted by Contracting Officer.

3.4 EXTERIOR PLANT ESTABLISHMENT PERIOD

The exterior plant establishment period will commence on the date that inspection by the Contracting Officer shows that the new plants furnished under this contract have been satisfactorily installed and must continue for a period of 365 days.

3.4.1 Frequency of Maintenance

Begin maintenance immediately after plants have been installed. Inspect exterior plants at least once a week during the installation and establishment period and perform needed maintenance promptly.

3.4.2 Promotion of Plant Growth and Vigor

Water, prune, fertilize, mulch, adjust stakes, guys and turnbuckles, eradicate weeds and perform other operations necessary to promote plant growth, and vigor.

SECTION 32 05 33 Page 9

3.4.3 Planter Bed Maintenance

Planter beds must be weeded, fertilized, irrigated, kept pest free, turf free, pruned, and mulch levels maintained. Planter beds will not be allowed to encroach into turf areas. A definite break must be maintained between turf areas and planter beds. Fertilize exterior planting materials to promote healthy plant growth without encouraging excessive top foliar growth. Remove noxious weeds common to the area from planting areas by mechanical means.

3.4.3.1 Shrub Selective Maintenance

In addition to the above requirements, shrubs must be selectively pruned, and shaped for health and safety when the following conditions exist:

Remove growth in front of windows, over entrance ways or walks, and any growth which will obstruct vision at street intersections or of security personnel; remove dead, damaged or diseased branches or limbs; where shrub growth obstructs pedestrian walkways; where shrub growth is found growing against or over structures; where shrub growth permits concealment of unauthorized persons. Dispose of all pruning debris in a proper manner.

3.4.3.2 Tree Maintenance

Tree maintenance must include adjustment of stakes, ties, guy supports, expandable tree trunk protectors, watering, fertilizing, pest control, mulching, pruning for health and safety . Fertilize exterior trees to promote healthy plant growth without encouraging excessive top foliar growth. Inspect and adjust stakes, ties, and guy supports to avoid girdling and promote natural development. All trees within the project boundaries, regardless of caliper, must be selectively pruned for safety and health reasons. These include but are not limited to removal of dead and broken branches and correction of structural defects. Prune trees according to their natural growth characteristics leaving trees well shaped and balanced. Pruning of all trees including palm trees must be accomplished by or in the presence of a certified member of the International Society of Arboriculture and in accordance with TCIA Z133 .

All pruning debris generated must be disposed of in a proper manner.

3.4.4 Slope Erosion Control Maintenance

Provide slope erosion control maintenance to prevent undermining of all slopes in newly landscaped and natural growth areas. Maintenance tasks include immediate repairs to weak spots in sloped areas, and maintaining clean, clear culverts, and graded berms, and terraces to intercept and direct water flow to prevent development of large gullies and slope erosion and during periods of extended rainfall, irrigation systems must be secured. Eroded areas must be filled with amended topsoil and replanted with the same plant species. Erosion control blankets damaged due to slope erosion must be reinstalled.

3.4.5 Removal of Dying or Dead Plants

Remove dead and dying plants and provide new plants immediately upon commencement of the specified planting season, and replace stakes, guys, mulch and eroded earth mound water basins. Provide an additional 90 day establishment period for replacement plants beyond the original warranty period. A tree must be considered dying or dead when the main leader has died back, or a minimum of 20 percent of the crown has died. A shrub or ground cover must be considered dying or dead when a minimum of 20 percent

SECTION 32 05 33 Page 10 of the plant has died. This condition must be determined by scraping on a branch an area 1/16 inch square, maximum, to determine the cause for dying plant material and must provide recommendations for replacement. The Contractor must determine the cause for dying plant material and provide recommendations for replacement.

3.4.6 Tracking of Unhealthy Plants

Note plants not in healthy growing condition, as determined by the Contracting Officer, and as soon as seasonal conditions permit, remove and replace with plants of the same species and sizes as originally specified.

Install replacement plantings in accordance with Section 32 93 00 EXTERIOR

PLANTS.

3.4.7 Final Inspection

Final inspection will be made upon written request from the Contractor at least 10 days prior to the last day of the establishment period. Final inspection will be based upon satisfactory health and growth of plants and on the following:

3.4.7.1 Total Plants on Site

Plants have been accepted and required number of replacements have been installed.

3.4.7.2 Mulching and Weeding

Planter beds and earth mound water basins are properly mulched and free of weeds.

3.4.7.3 Tree Supports

Stakes, and guys are in good condition.

3.4.7.4 Remedial Work

Remedial measures directed by the Contracting Officer to ensure plant material survival and promote healthy growth have been completed.

3.4.8 Unsatisfactory Work

When work is found to not meet design intent and specifications, maintenance period will be extended at no additional cost to the Government until work has been completed, inspected and accepted by Contracting Officer.

3.5 FIELD QUALITY CONTROL

3.5.1 Maintenance Inspection Report

Provide maintenance inspection report to assure that landscape maintenance is being performed in accordance with the specifications and in the best interest of plant growth and survivability. Site observations must be documented at the start of the establishment period, then quarterly following the start, and at the end of establishment period. Submit results of site observation visits to the Contracting Officer within 7 calendar days of each site observation visit.

SECTION 32 05 33 Page 11

3.5.2 Plant Quantities

Provide Contracting Officer with the number of plant quantities. In addition, provide total exterior area of hardscape and landscaping such as turf and total number of shrubs.

3.5.3 Tree Staking and Guying Removal

Provide a certified letter that all stakes and guys are removed from all project trees at the end of the establishment period.

-- End of Section --

SECTION 32 05 33 Page 12

SECTION TABLE OF CONTENTS

DIVISION 32 - EXTERIOR IMPROVEMENTS

SECTION 32 32 23.13

SEGMENTAL CONCRETE BLOCK RETAINING WALL

PART 1 GENERAL

1.1 REFERENCES

1.2 DEFINITIONS

1.2.1 Blocks

1.2.2 Drainage Aggregate

1.2.3 Fill

1.2.4 Reinforced Fill

1.2.5 Retained Fill

1.2.6 Reinforcement

1.2.7 Long Term Design Strength

1.3 SUBMITTALS

1.4 QUALITY CONTROL

1.4.1 Contractor Qualifications

1.4.2 Supplier Qualifications

1.4.3 Manufacturer's Representative

1.5 DELIVERY, STORAGE, AND HANDLING

1.5.1 Segmental Concrete Units and Wall Caps

1.5.2 Geosynthetic Labeling

1.5.3 Geosynthetic Handling

1.5.4 Geosynthetic Storage

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

2.1.1 Design Requirements

2.1.2 Design Parameters

2.1.2.1 External Stability Design Requirements

2.1.2.2 Seismic Design Requirements

2.1.2.3 Global Stability Design Requirements

2.1.3 Layout

2.2 COMPONENTS

2.2.1 Segmental Concrete Units

2.2.1.1 Face color

2.2.1.2 Face Texture

2.2.1.3 Face Appearance

2.2.1.4 Block Size

2.2.1.5 Bond Configuration

2.2.1.6 Structural requirements

2.2.2 Wall Caps

2.2.3 Geogrid Reinforcement

2.2.4 Geotextile Reinforcement

2.2.5 Reinforcement Properties

2.2.5.1 Long Term Design Strength

2.2.6 Geotextile Filter

2.3 MATERIALS

SECTION 32 32 23.13 Page 1

2.3.1 Soils and Aggregates

2.3.1.1 Drainage Aggregate

2.3.1.2 Aggregate Base Material

2.3.1.3 Reinforced Fill

2.3.1.4 Retained Fill

2.3.2 Masonry Adhesive

2.3.3 Drainage Pipe

PART 3 EXECUTION

3.1 EXAMINATION

3.2 PREPARATION

3.2.1 Excavation

3.2.2 Stockpiles

3.2.3 Leveling Pad

3.2.3.1 Aggregate Base Leveling Pad

3.2.3.2 Concrete Leveling Pad

3.3 INSTALLATION

3.3.1 Block Installation

3.3.2 Reinforcement Installation

3.3.3 Fill Placement

3.3.4 Compaction

3.3.4.1 Degree of Compaction

3.3.4.2 Moisture Control

3.4 FIELD QUALITY CONTROL

3.4.1 Soil Testing

3.4.1.1 Transmittal

3.4.1.2 Corrective Action

3.4.1.3 Testing Schedule

3.4.1.3.1 Moisture-Density Relations

3.4.1.3.2 In-Place Densities

3.4.1.3.3 Sieve Analysis

3.4.2 Reinforcement Testing

3.4.3 Drainage Pipe

3.4.4 Construction Tolerances

3.4.4.1 Horizontal

3.4.4.2 Vertical

3.4.4.3 Plumbness and Alignment

3.4.4.4 Block Defects

3.4.4.5 Block Gaps

3.5 PROTECTION

-- End of Section Table of Contents --

SECTION 32 32 23.13 Page 2

SECTION 32 32 23.13

SEGMENTAL CONCRETE BLOCK RETAINING WALL

PART 1 GENERAL

1.1 REFERENCES

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

AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS

(AASHTO)

AASHTO M 252 (2009; R 2017) Standard Specification for Corrugated Polyethylene Drainage Pipe

AASHTO M 288 (2017) Standard Specification for Geosynthetic Specification for Highway Applications

ASTM INTERNATIONAL (ASTM)

ASTM C94/C94M (2020) Standard Specification for Ready-Mixed Concrete

ASTM C136/C136M (2019) Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates

ASTM C140/C140M (2020a) Standard Test Methods for Sampling and Testing Concrete Masonry Units and Related Units

ASTM C920 (2018) Standard Specification for Elastomeric Joint Sealants

ASTM C1372 (2017) Standard Specification for Dry-Cast Segmental Retaining Wall Units

ASTM D448 (2012; R 2017) Standard Classification for Sizes of Aggregate for Road and Bridge Construction

ASTM D698 (2012; E 2014; E 2015) Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 ft-lbf/cu. ft.

(600 kN-m/cu. m.))

ASTM D1241 (2015) Materials for Soil-Aggregate Subbase, Base, and Surface Courses

ASTM D1556/D1556M (2015; E 2016) Standard Test Method for Density and Unit Weight of Soil in Place by Sand-Cone Method

SECTION 32 32 23.13 Page 3

ASTM D1557 (2012; E 2015) Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3) (2700 kN-m/m3)

ASTM D2487 (2017; E 2020) Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System)

ASTM D2488 (2017; E 2018) Standard Practice for Description and Identification of Soils (Visual-Manual Procedure)

ASTM D4355/D4355M (2014) Deterioration of Geotextiles from Exposure to Light, Moisture and Heat in a Xenon-Arc Type Apparatus

ASTM D4491/D4491M (2017) Standard Test Methods for Water Permeability of Geotextiles by Permittivity

ASTM D4595 (2017) Standard Test Method for Tensile Properties of Geotextiles by the Wide-Width Strip Method

ASTM D4632/D4632M (2015a) Grab Breaking Load and Elongation of Geotextiles

ASTM D4751 (2020) Standard Test Method for Determining Apparent Opening Size of a Geotextile

ASTM D4873/D4873M (2017) Standard Guide for Identification, Storage, and Handling of Geosynthetic Rolls and Samples

ASTM D5321/D5321M (2020) Standard Test Method for Determining the Shear Strength of Soil-Geosynthetic and Geosynthetic-Geosynthetic Interfaces by Direct Shear

ASTM D6638 (2011) Determining Connection Strength Between Geosynthetic Reinforcement and Segmental Concrete Units (Modular Concrete Blocks)

ASTM D6706 (2001; R 2013) Standard Test Method for Measuring Geosynthetic Pullout Resistance in Soil

ASTM D6938 (2017a) Standard Test Method for In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth)

SECTION 32 32 23.13 Page 4

GEOSYNTHETIC INSTITUTE (GSI)

GSI GRI GG6 (1996) Grip Types for Use in Wide Width Testing of Geotextiles and Geogrids

NATIONAL CONCRETE MASONRY ASSOCIATION (NCMA)

NCMA TR127B (2010) Design Manual for Segmental Retaining Walls

U.S. FEDERAL HIGHWAY ADMINISTRATION (FHWA)

FHWA NHI-10-024 (2009) Design and Construction of Mechanically Stabilized Earth Walls and Reinforced Soil Slopes – Volume I

1.2 DEFINITIONS

1.2.1 Blocks

Blocks, for the purpose of this specification, refers to segmental concrete retaining wall units.

1.2.2 Drainage Aggregate

Granular soil or aggregate placed within, between, and/or immediately behind segmental concrete units.

1.2.3 Fill

Soil or aggregate placed in, behind, or below the wall.

1.2.4 Reinforced Fill

Soil placed and compacted within the neat line volume of reinforcement as outlined on the plans.

1.2.5 Retained Fill

Soil placed and compacted behind the reinforced fill.

1.2.6 Reinforcement

Geogrid or a geotextile products manufactured for use as reinforcing in segmental block retaining walls. Steel products are not allowed.

1.2.7 Long Term Design Strength

The long term design strength (LTDS) is:

LTDS = Tult / (RFD * RFID * RFCR) where:

Tult is the ultimate strength RFD is the reduction factor for chemical and biological durability RFID is the reduction factor for installation damage RFCR is the reduction factor for creep

SECTION 32 32 23.13 Page 5

1.3 SUBMITTALS

Government approval is required for submittals with a "G" or "S" classification. Submittals not having a "G" or "S" classification are for information only. When used, a code following the "G" classification identifies the office that will review the submittal for the Government.

Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-02 Shop Drawings

Shop Drawings; G

SD-03 Product Data

Segmental Concrete Units; G

SD-04 Samples

Segmental Concrete Units; G

Geogrid Reinforcement; G

SD-05 Design Data

Calculations; G

Survey And Grade Results; G

SD-06 Test Reports

Soil Testing; G

Reinforcement Testing; G

SD-07 Certificates

Supplier Qualifications

Manufacturer's Representative

Geogrid Reinforcement; G

Geotextile Reinforcement; G

1.4 QUALITY CONTROL

1.4.1 Contractor Qualifications

Furnish components and equipment from a manufacturer regularly engaged in the manufacturing of products that are of similar material, design and workmanship. Submit descriptive technical data on the blocks, wall caps, masonry adhesive, reinforcement, geotextile filter materials and equipment to be used. Include all material properties specified under PART 2 PRODUCTS. Include a copy of any standard manufacturer's warranties for the products. Provide standard products with satisfactory commercial or industrial use for 2 years before award of this contract. Submit documentation to demonstrate the job foreman or the company directly responsible for the wall installation has completed a minimum of 10

SECTION 32 32 23.13 Page 6 segmental concrete retaining wall projects with at least 2 years experience.

1.4.2 Supplier Qualifications

Submit documentation showing that the installer and supplier meet the qualifications listed. To be considered acceptable, demonstrate experience in the supply of similar size and types of segmental retaining walls on previous projects.

1.4.3 Manufacturer's Representative

Provide a qualified and experienced representative from the block or reinforcement manufacturer who is available to consult and conduct site visits on an as-needed basis during the wall construction at least once during construction as requested by the Contracting Officer.

1.5 DELIVERY, STORAGE, AND HANDLING

Check products upon delivery to ensure that the proper material has been received and is undamaged. For geosynthetics, follow the guidelines presented in ASTM D4873/D4873M.

1.5.1 Segmental Concrete Units and Wall Caps

Protect blocks from damage and exposure to cement, paint, excessive mud, and like materials. Check materials upon delivery to assure that the block dimensions are within the tolerances specified.

1.5.2 Geosynthetic Labeling

Label each roll with the manufacturer's name, product identification, roll dimensions, lot number, and date manufactured.

1.5.3 Geosynthetic Handling

Handle and unload geosynthetic rolls by hand, or with load carrying straps, a fork lift with a stinger bar, or an axial bar assembly. Do not drag, lift by one end, lift by cables or chains, or drop to the ground any geosynthetic rolls.

1.5.4 Geosynthetic Storage

Protect geosynthetics from cement, paint, excessive mud, chemicals, sparks and flames, temperatures in excess of 160 degrees F, and any other environmental condition that may degrade the physical properties. If stored outdoors, elevate rolls from the ground surface. Protect geosynthetics, except for extruded grids, with an opaque waterproof cover.

Deliver to the site in a dry and undamaged condition. Do not expose geotextiles to direct sunlight for more than 7 days.

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

This work element includes engineering services in addition to the construction requirements. Provide engineering services that include design of the wall in accordance with the National Concrete Masonry Association design method, and providing shop drawings indicating all features of the complete design.

SECTION 32 32 23.13 Page 7

The NCMA design method for segmental retaining walls considers potential failure modes categorized by external, internal, local, compound, and global stability. The Government has considered the global stability and has provided the minimum design requirements on the drawings. Provide engineering services that include analysis of the wall for all modes of stability and shop drawings indicating all features of the complete design.

2.1.1 Design Requirements

Complete all stability analyses in accordance with either the NCMA TR127B, or the Federal Highway Administration/AASHTO method detailed in FHWA NHI-10-024. Follow only one method for the complete design, including reinforcement design strength, layout, stability calculations, and seismic effects. Design the segmental retaining wall system under the direction of a professional engineer. Affix engineer's stamp to all drawings. At least one site visit by the engineer is required during the construction phase.

The design engineer must stamp all drawings and calculations.

2.1.2 Design Parameters

Include in all calculations the determination of long term design strength of reinforcement specific to this project in accordance with the NCMA TR127B or FHWA NHI-10-024. Base the ultimate strength or index strength on the minimum average roll value tensile strength of the product using the wide width strength test in ASTM D4595. Submit design calculations, including computer output data, program documentation, and all items described under PARAGRAPH: SEGMENTAL RETAINING WALL DESIGN.Itemize list of each reduction factor and include backup data to justify each reduction factor included in the calculations. Include analysis of all failure modes listed in the NCMA TR127B. Include a clear outline of material properties and assumptions. Use the following soil parameters and water elevation for stability analysis, and select additional soil parameters as required to complete the analysis.

Moist Unit Weight of reinforced fill 130 pcf

Saturated Unit Weight of reinforced fill

Per manufacturer specifications

Internal Friction Angle of reinforced fill

34 degrees

Cohesion of reinforced fill Per manufacturer specifications

Water Elevation in reinforced fill 0 feet

2.1.2.1 External Stability Design Requirements

As a minimum requirement, ensure the length of the reinforcing at the base of the wall is no less than 0.7 times the total height of the blocks.

2.1.2.2 Seismic Design Requirements

Complete the seismic stability analysis in accordance with NCMA TR127B or FHWA NHI-10-024. Determine the pseudo-acceleration value with a 10 percent probability of exceedance in 50 years (referred to as the A value by NCMA and FHWA.

SECTION 32 32 23.13 Page 8

2.1.2.3 Global Stability Design Requirements

Use the requirements listed in Table 1 to determine the minimum long term design strength of the lowest required number of reinforcement layers. Use reinforcement lengths at least as long as the lengths shown on the drawings.

2.1.3 Layout

Show on the shop drawings (fabrication and installation drawings) all information needed to fabricate and erect the walls including the leveling pad elevations; the shape and dimensions of wall elements; the number, size, type, and details of the soil reinforcing system and anchorage; and identification of areas requiring coping. Include with the shop drawings all items described under paragraph SEGMENTAL RETAINING WALL DESIGN. If approved by the Contracting Officer, shop drawings may consist of marked up contract drawings showing exact dimensions for the blocks supplied, required coping, and other minor revisions. The design and layout of the internal reinforcement are subject to the following:

a. Incorporate all features indicated in the contract documents in the final design and construction.

b. The leveling pad elevations may vary, as long as they are no higher than the embedment depth profile.

c. Run each reinforcement level as continuous as practical throughout the profile.