Technical_Specifications.pdf

TECHNICAL

SPECIFICATIONS

HANDBALL COURT

IMPROVEMENTS AT

CHARTER OAK PARK

BID 22/23-044

Town of Manchester, CT

REINFORCED CONCRETE COURT SLAB

TECHNICAL SPECIFICATIONS

REINFORCED CONCRETE COURT SLAB

MATERIALS

1. Concrete

a. The concrete furnished shall conform in respects to composition, transportation, mixing and placing to Class “F” Concrete as specified in Section M.03 of Form

817 or as modified herein.

b. Test concrete in accordance with AASHTO or ASTM Standard Test Methods as listed herein.

c. All concrete mixes shall include air entraining and water reducing admixtures and, as needed, a retarder or accelerator. All admixtures must be on the

Connecticut DOT approved list.

d. Entrained air contents shall be maintained as follows:

Nominal Max Average Air

Aggregate Size Content

3/8" 7.5%

1/2" 7.0%

3/4" 6.0%

A range of ±1.5% from the required average is permissible for field tests.

Slump at the point of placement shall be 4" ±1".

e. No additional materials will be added to the concrete mix at the job site without the prior approval of the Engineer.

2. Reinforcing

a. Welded Wire Mesh: WWM shall be used in all driveways and specified sidewalk locations. The WWM shall be W1.4xW1.4 and conform to the latest AASHTO

M 55M/M 55 “Standard Specifications for Welded Steel Wire Fabric for Concrete

Reinforcement.”

Written requests may be made to substitute synthetic fibers such as Fibermesh or approved equal for welded wire mesh with written approval of the Engineer. The addition rate shall be 1.5 lb/cu yard.

3. Construction/Isolation Joint Material

Joint material shall be one-half (2) inch in thickness, equal in width to the slab thickness and conform to AASHTO M33, Asphaltic Expansion Joint Materials.

4. Forms

The forms used shall be straight and firmly supported and staked to the line and grades as shown on the plans or as directed by the Engineer. The forms shall be free from warp and shall be of sufficient strength to resist springing out of shape. All forms shall be cleaned and oiled before use.

REINFORCED CONCRETE COURT SLAB

5. Curing Materials

A liquid membrane curing compound such as Masterkure by Master Builders or approved equal and meeting AASHTO M148 shall be applied in accordance with the manufacturer’s instructions over the completed concrete surface area.

6. Processed Aggregate Base

Processed aggregate base shall conform to the requirements of Section M.05.01 of Form

818.

CONSTRUCTION DETAILS

1. Excavation

Excavation shall be made to the required depths below the finished grade as shown on the plans or as directed. All soft and yielding material shall be removed and replaced with suitable material.

2. Processed Aggregate Base

The base course shall be placed in layers not to exceed six inches (6”) in depth and to such a depth that after compaction it shall be at the specified depth below the finished grade of the slab.

3. Forms

Forms shall be straight, free from warp and of sufficient strength to resist springing from the pressure of the concrete. Forms shall be of minimum 5” depth and shall have a flat surface on the top. Forms shall be securely staked, braced and held firmly to the required line and grade and shall be sufficiently tight to prevent leakage of mortar. All forms shall be cleaned and oiled or wetted before concrete is placed against them. If the concrete is placed in alternate sections, these templates shall remain in place until concrete has been placed on both sides of the template. As soon as the concrete has obtained its initial set, the templates shall be removed.

4. Joints

Install control joints at the locations and as detailed on the Plans. Control joints shall be sawcut to a minimum depth of 1.5” into the slab. All joints shall be straight and square.

Install asphaltic expansion joint material between the new slab and the existing court wall.

5. Concrete Placement and Finishing

a. Subgrade preparation: The subgrade shall be approved by the Engineer prior to placement of concrete. The grade will be free of soft areas, roots, rubble and large stones. It shall be fully compacted and graded to provide the specified slab thickness within ±¼".

REINFORCED CONCRETE COURT SLAB

b. Forms: Align forms as shown on drawings and secure to provide straight edges and uniform curves. Remove only after the concrete has gained sufficient strength to prevent chipping or raveling of the edges.

c. Install welded wire mesh. Support the mesh on concrete bricks or other supports so that it will remain in the upper third of the slab.

d. Moisten the subgrade before starting concrete placement to eliminate water loss.

e. Pour continuously such that the entire slab is poured in one day.

f. Water may be added to the truck mixer to adjust the slump when the discharge begins, only if the concrete is below the specified water cement ratio and maximum slump upon arrival at the job site. Water shall not be added to the batch at any later time. If higher slumps are required, use a high range water reducer such as Rheobuild 1000 by Master Builders or equal as approved by the

Engineer.

g. Screed the concrete to grade, bull float or darbie, consolidate formed edges by spading with a hand float, and leave until edging can begin. Allow to harden sufficiently so that a foot leaves only a slight imprint. Floating should not begin until the water sheen has disappeared. The surface shall be worked and floated with a wooden, aluminum or magnesium float or finishing machine using float blades. The outside edges of the slab shall be edged with one-quarter (¼) inch radius tool. The slab shall then be broomed crosswise with a fine hair broom leaving the surface free from all tool marks.

h. Immediately upon the disappearance of the water sheen following the final finishing and before any marked dehydration or checking occurs, the curing compound shall be applied using an approved spraying device. The sprayer shall deliver a fine spray with uniform coverage. Coverage rate shall be that recommended by the curing compound manufacturer.

i. The Contractor shall have on the job, at all times, sufficient polyethylene film or waterproof paper to provide complete coverage in the event of rain. Protect the surface if rain occurs before final set or use for curing in the event of a breakdown of the spray equipment.

j. If rain falls on the newly coated slab before the curing film has dried sufficiently to resist damage, or if the film is damaged in any other manner, the contractor shall reapply same. Treated surfaces shall be protected from all foot or vehicular traffic for a sufficient period of time to prevent damage.

k. Within 24 hours, spray curing compound on newly poured slab and sawcut control joints.

6. Special Conditions

a. Low Temperature Placements: No concrete is to be placed when air temperature is below 50°F unless additional precautions are taken and prior approval is given by the Engineer. The Engineer must approve all placements below 50°F. No concrete will be placed on frozen sub-grade or at temperatures below 20°F.

Concrete exposed to temperatures below 40°F after placement must be protected through the use of insulating blankets, a six (6) inch layer of straw that is maintained in a dry condition by a covering of plastic sheeting, or other

REINFORCED CONCRETE COURT SLAB

appropriate methods. Any concrete placed during cold weather that is damaged because of freezing shall be replaced at the Contractor’s own expense.

b. Special consideration for high temperature placements and rapid drying conditions should be discussed with the Engineer. No additional materials will be added to the concrete mix at the job site without the prior approval of the

Engineer.

7. Backfilling and Removal of Surplus Material

The sides of all finished concrete work shall be backfilled to the limits shown on the drawings or as directed by the Engineer, with suitable material thoroughly compacted and finished flush with the top of the concrete. All surplus material shall be removed and the site left in a neat and presentable condition to the satisfaction of the Engineer.

8. Protection

The Contractor shall protect newly poured concrete surfaces so as to prevent damage from falling objects, vandalism, etc. The Contractor shall repair or remove and replace any damaged or defaced concrete surface at his own expense. Determination to repair or remove and replace will be at the sole discretion of the Engineer.

ACRYLIC SURFACE COATING

ACRYLIC SURFACE COATING

MATERIALS

Primer/Sealer: A polyurethane based waterproof sealer designed for use over post-tensioned concrete slabs. Minimum adhesion to subsurface of 4000 psi per ASTM D-4545.

Acrylic Base Coat: “NovaPlay Base Coat” heavy duty acrylic resurfacer as manufactured by Nova Sports USA., Milford, MA (www.novasports.com), or approved equal

Acrylic Surface Coat: “NovaPlay” heavy duty color coating system as manufactured by

NovaSports USA, Milford, MA (www.novasports.com), or approved equal.

Colors to be selected from the manufacturer’s complete range of colors.

CONSTRUCTION METHODS

Allow new concrete to cure a minimum of twenty-one (21) days before application of acrylic surface coating.

Surface to be treated shall be dry, thoroughly cleaned and free of dirt, grease, oil or other foreign materials.

Surface coating shall not be applied when surface temperature is below 50°F or above 130°F or when high humidity is present.

Apply concrete primer to all areas of the concrete slab at a rate of 110 to 120 square feet per gallon and in accordance with manufacturer’s instructions. Remove any imperfections prior to application of acrylic surface coating.

Apply one coat of base coat in accordance with manufacturer’s recommended application instructions. Remove any imperfections between coats.

Apply two coats of surface coat in accordance with manufacturer’s recommended application instructions. Remove any imperfections between coats.

WARRANTY

The Contractor shall provide a minimum five (5) year warranty from the date of application against defects on the acrylic surface coating.

COURT MARKINGS

COURT MARKINGS

Line Paint: “Action Pave Acrylic White Line Paint” 100% acrylic emulsion as manufactured by Copeland Coating Company Inc., Nassau, NY (www.copelandcoating.com); or approved equal

CONSTRUCTION METHODS

Surface to be marked shall be dry, thoroughly cleaned and free of dirt, grease, oil or other foreign materials.

Markings shall not be applied when surface temperature is below 50°F or above 130°F or when high humidity is present.

Apply markings in accordance with manufacturer’s recommended application instructions.

Application shall be such as to prevent fogging, overspray or spattering.

BITUMINOUS CONCRETE SIDEWALK

BITUMINOUS CONCRETE SIDEWALK

MATERIALS

Bituminous Concrete shall conform to the requirements of Section M.04, of Form 818. HMA

S0.375 shall be used.

Processed aggregate base shall conform to the requirements of Section M.05.01 of Form 818.

The tack coat to be used on all cold joints shall conform to the requirements of Section M.04 of

Form 818.

Joint seal shall conform to the requirements of Section M.04.01.8 of Form 818.

1. Preparation: Excavate to the required depth below the finished grade, as shown on the

Plans or as directed by the Engineer. The existing base material shall be compacted and any loose material removed. Joints between new and old sidewalk surfaces shall be sawcut and joint sealed.

2. Forms: When the bituminous concrete is spread by hand, forms shall be used. Forms shall be of metal or wood, straight, free from warp and of sufficient strength to resist springing from the impact of the roller. If of wood, they shall be of two (2) inch surfaced plank except that at sharp curves thinner material may be used; if of metal, they shall be of an approved section. All forms shall be of a depth equal to the depth of the sidewalks or driveways and shall be securely staked, braced, and held firmly to the required line and grade. All forms shall be cleaned and oiled each time they are used.

3. Bituminous Concrete Surface: This surface shall be constructed in accordance with the requirements of Section 4.06.03 of Form 818.

4. Backfilling and Removal of Surplus Material: The sides of the sidewalk shall be backfilled with suitable material and thoroughly compacted and finished flush with the top of the sidewalk. All surplus material shall be removed and the site left in a neat and presentable condition to the satisfaction of the Engineer.

CHAIN LINK FENCE

MATERIALS

Chain Link Fence Fabric

Provide fabric in one-piece heights measured between top and bottom of outer edge or selvage knuckle or twist according to “ASTM-F 668” and requirements indicated below:

1. Class of Polymer: Class 2b

2. Color: Black

3. Mesh Size: 1”

4. Diameter of metallic-coated core wire: 0.192 in., 6 gauge prior to polymer coating

5. Fabric Height: As shown on Plans

6. Type of Selvage: knuckled at one selvage and twisted at the other

7. Manufacturer’s Material Certification: REQUIRED AT SUBMITTAL PHASE OR

PRIOR TO UNLOADING AT JOB SITE. All rolls must be ticketed to match

Certification or fabric will be rejected. If fabric is damaged, it will not be allowed on-site. The Town must be there when material is delivered to approve unloading.

Framework

Framework, including rails; braces and line, terminal and corner posts shall conform to ASTM

F1043. Provide members with minimum dimensions and wall thickness according to ASTM F

1043 or ASTM F 1083 based on the following:

1. Fence Height: As shown on the Plans

2. Heavy-Industrial-Strength Material: Group IC, round steel pipe Schedule 40, minimum 50K psi

3. Coating Requirements: External-Type B

Internal-Type B

Supplemental Color Coating-Polyester 3-mils(0.0076mm)

Color: Black per ASTM F 934

Additional Coating Requirements: ASTM D 1499, ASTM D 3359

4. Post/pipe dimensions: As shown on the Plans

5. Manufacturer’s Material Certification: Required prior to unloading at project site.

All pipes must be ticketed to match Certification or framework will be rejected.

If framework is damaged, it will not be allowed on-site. The Engineer must be present when material is delivered for approval.

Fittings

Fittings shall conform to ASTM F626 and as follows:

1. Provide post caps for each post.

2. Provide rail and brace ends for each gate, corner, pull and end post

3. Rail Fittings: Top rail sleeves shall be pressed or round steel tubing not less than

6 inches long; Provide line and corner boulevard clamps for connecting intermediate and bottom rails to posts.

4. Tension Bars: Steel; Provide one bar for each gate and end post and two for each corner and pull post.

5. Tie Wire: Vinyl coated or powder coated No. 6 gage steel wire

6. Coating: Powder coated black for all fittings.

7. Manufacturer’s Material Certification: Material Certifications will be required prior to unloading at project site. The Engineer must be present when material is delivered to approve unloading.

Grout and Anchoring Cement

1. Non-shrink Grout: Factory-packaged, non-staining, non-corrosive grout complying with ASTM C 1107, specifically for exterior applications.

2. Anchoring Cement: Factory packaged, non-shrink, non-staining, hydraulic-controlled expansion cement formulation for mixing with water at project site to create pourable anchoring, patching and grouting compound. Provide formulation that is resistant to erosion from water exposure without needing protection by a sealer or waterproof coating, and that is recommended by manufacturer for exterior applications.

Install chain link fence according to ASTM F 567 and as specified herein.

Drill or hand excavate post holes to diameters and spacing indicated on Plan.

Set posts plumb in concrete and vibrate or tamp for consolidation. Exposed concrete shall be flush to grade. Install dome caps on top of posts.

End posts shall be braced; and corner posts shall have two braces.

Pull posts with two braces shall be provided for all heights where changes in horizontal or vertical alignment of ten (10) degrees or more occur.

Where braces are required, they shall be spaced as indicated on the plans.

Braces shall be securely fastened to posts by suitable connections and trussed from line post back to post requiring bracing with 3/8-inch round rod, having a turnbuckle adjustment.

The top rail shall pass through the base of the line post cap and form a continuous brace from end to end of fence. The rail shall be provided with couplings approximately every 20 feet. The couplings shall be of the outside-sleeve type and at least seven inches (7”) long, one (1) coupling in every five (5) to have a heavy spring to take up expansion and contraction in the top rail.

Install intermediate rails if shown on the Plan. Secure to posts with fittings.

Fabric shall be fastened to line posts with bands or wire clamps of No. 6-gage PVC coated steel wire 4-3/4 inches long. These bands shall be spaced approximately 12 inches apart. The fabric shall be fastened to the top rail with tie wires after the fabric has been pulled taut. These tie wires shall be 6-1/4 inches long, spaced approximately 24 inches apart.

RESTORATION OF LAWN AREAS

Fertilizer: Fertilizer shall conform to the requirements of Section M.13.03 of Form 818 or an approved equal. Soil testing and analysis may be performed by the Contractor at the

Contractor’s expense to determine fertilizer rate. Submit Manufacturer’s product specifications and guaranteed purity analysis for fertilizer. Apply at a minimum rate of 25 lbs/ 1,000 SF or as per recommended by results of soil testing.

Mulch: Cellulose fiber mulch shall conform to the requirements of Section M.13.05.3 of Form

818. Apply at a minimum rate of 40 lbs/ 1,000 SF.

Tackifier: Organic tackifier shall be applied at rate of 70 lbs./acre

Topsoil: The term topsoil used herein shall mean a soil meeting the soil textural classes established by the United States Department of Agriculture Classification System based upon the proportion of sand, silt, and clay size particles after passing a two (2) millimeter (mm) sieve and subjected to a particle size analysis. The topsoil shall not contain less than 6% nor more than

20% organic matter as determined by loss-on-ignition of oven dried samples dried at 105 degrees centigrade.

The following textural classes shall be acceptable:

Loamy sand, including coarse, loamy fine, and loamy very fine sand

Sandy loam, including coarse, fine and very fine sandy loam

Loam

Silt loam, with not more than sixty (60) percent silt

The topsoil to be furnished by the Contractor shall be loose, friable, reasonably free of admixtures of subsoil, free from refuse, stumps, roots, brush, weeds, rocks, and stones ½ inch and over in all dimensions. The topsoil shall also be free from any material that will prevent the formation of a suitable seedbed or prevent seed germination and plant growth.

Seed: Shall meet the requirements of Section M.13.04 of Form 818 and be fresh and clean and new crop seed composed of an evenly graded mixture by proportion and testing minimum percentages of purity and germination indicated, or as approved by the Engineer.

The grass seed mixture, for lawns with <=3:1 slope with mowing required, shall have no noxious weeds in mix and shall conform to the following CTDOT mixture:

Species

Proportion by Weight

(Pounds)

Minimum

Purity

(Percent)

Minimum

Germination

(Percent)

VELVET

BENTGRASS

(ARGOSTIS

CANINA)

25 96 85

Certified Variety

RED FESCUE

(FESTUCA RUBRA

L. SSP. RUBRA)

Certified Variety

35 97 80

PARTRIDGE PEA

(CHAMAECRISTA

FASCICULATA)

Certified Variety

10 95 90

INDIAN GRASS

(SORGHASTRUM

NUTANS)

Certified Variety

15 95 90

CANADA

WILDRYE

(ELYMUS

CANADENSIS)

Certified Variety

5 95 90

KENTUCKY BLUE

GRASS (POA

PRATENSIS)

Certified Variety

10 95 90

Under no circumstances shall annual Ryegrass, Italian Rye, or any other seed be added to the seed mixture.

Construction methods shall be those established as agronomically acceptable and feasible and which are approved by the Engineer.

The existing ground shall be graded to a reasonably true surface.

Topsoil shall be spread and shaped to meet existing elevation, after settlement and compaction has occurred, and have a minimum depth of four (4) inches with all stone larger than ½" removed.

It shall be the Contractor's responsibility to restore to the line, grade and surface all eroded areas with approved material and to keep topsoiled areas in acceptable condition until the completion of the construction work.

Examine work area before proceeding with any work and notify the Engineer in writing on conditions which may prevent the proper execution of this work. Failure to report unsuitable conditions will require the contractor to rectify unacceptable work at no additional cost to the

Town.

Allow the planting area soil surface to dry out for one day only prior to the hydroseeding application. Exercise care not to allow the soil surface to be overly saturated with water prior to the hydroseeding installation. At the same time the soil surface should not become too dry during this period. There should be some residual moisture within the first 1/4 inch of the soil surface.

Notify the Engineer at least 48 hours prior to starting the hydroseeding operation. The Engineer shall be present during the hydroseeding operation and has final determination if conditions are acceptable for hydroseed application.

Application rates for hydroseed shall be as defined by the manufacturer.

Apply the hydroseed in the form of a slurry consisting of organic soil amendments, commercial fertilizer, and any other chemicals that are called out. When hydraulically sprayed onto the soil, the mulch shall form a blotter-like material. Direct the spray operation so that this procedure will drill and mix the slurry components into the soil, the slurry spray will also penetrate the soil surface, thus ensuring maximum impregnation and coverage. The impregnation and mixing of the components will help in retaining moisture while stabilizing soil surface from superficial erosion.

Do not leave the hydroseeding slurry components in the hydroseeding machine for more than two (2) hours because of possible seed destruction. If slurry components are left idle for more than two hours in the machine, add 50% more of the originally specified seed mix to any slurry mixture which has not been applied within the two hours after mixing. Add 75% more of the original seed mix to any slurry mixture which has not been applied eight (8) hours after mixing.

All mixtures more than eight (8) hours old, must be disposed, offsite, at the contractor's expense.

Spray the area with a uniform visible coat, using the dark color of the cellulose fiber as a visual guide. The slurry shall be applied in a downward drilling motion via a fan stream nozzle. Insure that all of the slurry components enter and mix with the soil. Insure the uniformity of the hydroseed application. Exercise special care to prevent any of the slurry from being sprayed onto any hardscape areas including concrete walks, fences, walls, buildings, etc. Remove all slurry sprayed onto these surfaces at the contractor's expense.

Contractor shall save all seed and fertilizer tags and fiber mulch bags for the Engineer to verify compliance with the drawings and specifications.

The Contractor shall maintain the area until sufficient seed growth has occurred to stabilize the soil. This includes the restoration of all eroded areas, and the placing and maintaining of erosion control measures as required to prevent further erosion.

Normal seeding season shall be:

For Grass:

Spring seeding - March 15 to June 30

Fall seeding - August 15 through October 31

For Wildflower:

Spring seeding - March 1 to May 15

Fall seeding - November 15 to December 15

Seeding at other times will be allowed only with permission of the Engineer.

The Contractor may be required to top dress and reseed certain areas to achieve sufficient, uniform turf establishment.

MAINTENANCE

Upon completion of hydroseeding operations, maintain all hydroseeded areas for a period of 90 calendar days as follows:

1. Germination stage irrigation: Approximately 24 hours after hydroseeding the planting areas, initiate the watering sequence. Leave the water on long enough to moisten the soil thoroughly to the depth of the slurry mulch taking care not to super saturate or wash away the slurry and seed. Perform frequent, light irrigation until the seed has germinated. Repair all seed washings and erosion.

2. Establishment stage irrigation: After germination, reduce each watering. The specific watering program shall be approved by the Engineer.

Fertilize all hydroseeded areas with an approved commercial fertilizer approximately thirty (30) calendar days from the start of the maintenance period.

ACCEPTANCE

Final approval and acceptance will be given in writing by the Engineer following a final acceptance inspection. The Engineer reserves the option to extend the maintenance period to achieve complete germination of all turf or other plant materials with a uniform height, color and density throughout all hydroseeded areas. Final acceptance may be given at the end of the 90 calendar day maintenance period if an acceptable germination of turf and adequate plant establishment has been obtained, as determined by the Engineer.

GUARANTEE AND REPLACEMENT

Provide a guarantee for a period of one (1) year after final acceptance, that the installed grass areas be at least the quality and condition as at the time of acceptance. Rehydroseed unacceptable areas during the guarantee period. The guarantee shall not include damage or loss of turf due to acts of God, acts of vandalism or negligence on the part of the Town.

EROSION AND SEDIMENTATION CONTROLS

Geotextile shall conform to Section M.08.01.19 of Form 818.

Silt Sack shall be Hi-Flow Siltsack® Type A (for Type “C-L” catch basin tops) and Type B with curb deflector (for Type “C” catch basin tops or other structure with curb inlets) as manufactured by ACF Environmental, Inc., Richmond, VA (800-448-3636) or approved equal. Silt sack shall be provided with internal overflows and meet the following criteria:

Properties Test Method Units

Grab Tensile Strength ASTM D-4632 265 lbs

Gran Tensile Elongation ASTM D-4632 20%

Puncture ASTM D-4833 135 lbs

Mullen Burst ASTM D-3786 420 psi

Trapezoid Tear ASTM D-4533 45 lbs

UV Resistance ASTM D-4355 90%

Apparent Opening Size ASTM D-4751 #20 U.S. Sieve

Flow Rate ASTM D-4491 200 gal/min/sq ft

Permittivity ASTM D-4491 1.5/sec

RESPONSIBILITY

It is the Contractor’s sole responsibility to provide and continually inspect and maintain all erosion and sedimentation control measures on the site. Failure to do so may result in enforcement actions by the Town of Manchester or State of Connecticut. The erosion and sedimentation control measures shown on the Plans or in these Specifications are intended as a guideline to show the minimal control measures required based on the intended construction.

Additional control measures may be necessary depending upon the Contractor’s operations and scheduling of the project.

Geotextile sedimentation control systems may consist of either a prefabricated geotextile fence or a geotextile fence assembled by the Contractor in the field. Geotextile sedimentation control systems shall be installed so that the bottom six (6) inches of the fabric is buried by either trenching or by laying the six (6) inch section horizontally on the ground and burying by ramping the soil up to the control fence. All geotextile fences shall be a least 42 inches in exposed height as installed, with not less than a two (2) degree and not more than a 20 degree inclination toward the potential silt source. Hardwood posts shall have a minimum cross-section size of at least 1.5 inches by 1.5 inches and a minimum length of 30 inches. Steel posts shall be at least 0.5 pound per linear foot with a minimum length of 48 inches. Spacing between posts shall not exceed ten

(10) feet, and all posts shall be driven a minimum of 12 inches into the ground. When joints between sections of geotextile sedimentation control systems are necessary, geotextile shall be spliced together only at a support post, with a minimum six (6) inch overlap, and securely sealed.

The installations shall be maintained or replaced until they are no longer necessary for the purpose intended or are ordered removed by the Engineer. Cleanout of accumulated sediment shall be accomplished when one-half of the original height of the sedimentation control system, as installed, becomes filled with sediment or as ordered by the Engineer.

The geotextile fence systems will be completely removed from the project at the completion of the project, unless specifically authorized by the Engineer to be left in place.

Silt sacks shall be installed in accordance with manufacturer’s instructions and shall be emptied and legally disposed of when they have collected 6” to 12” of sediment and when directed by the

Engineer. Silt sacks shall be inspected every 1 to 2 weeks and after every major rainfall event.