MILLING OF ASPHALT PAVEMENT SURFACE

32 01 16.71-1

SECTION 32 01 16.71

MILLING OF ASPHALT PAVEMENT SURFACE

PART 1 GENERAL

1.01 SECTION INCLUDES

A. Milling of asphalt roadways and parking lots.

1.02 DESCRIPTION OF WORK

A. This work includes full 1 ½ inch depth milling of the existing asphalt pavement surface, with specified equipment, to the specified depth. All work is to be done in accordance with PennDOT publication 408, section 491 and or section 492.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.01 EQUIPMENT

A. Use a milling machine designed and built for this type of work. Provide a machine with an effective automatic grade and slope control system and having the capacity to mill concrete patches and asphalt surfaces.

3.02 MILLING OPERATION

A. Mill so the finished surface is free from gouges, grooves, and ridges and is in accordance with the specified surface tolerance requirements, or as directed.

B. To facilitate traffic control, pick up and move milled material immediately after the milling operations.

C. Use care to remove the existing asphalt material around all utility facilities within the work areas.

D. Repair or replace, to the satisfaction of the utility owner, utility facilities which are damaged by the milling operation.

E. Control the rate of milling to avoid tearing of the mat, resulting in chunky an non-uniformly milled material.

F. Separate oversize and chunky milled material as directed.

G. Keep the milled pavement surface free of all loose materials and dust.

3.03 SURFACE TOLERANCE

A. Test the finished surface with a ten (10) foot straightedge whenever Engineer suspects an area is deficient or irregular.

B. Use the straightedge at transverse joints and paving notches.

C. Hold the straightedge in successive positions parallel to the road centerline, in contact with the surface, and check the whole area from one side to the other, as necessary.

D. Advance along the pavement in stages of not more than one-half the length of the straightedge.

E. Correct irregularities of more than 3/16 inches.

F. For irregularities which develop before completion of rolling, correct by loosening surface mixture and removing or adding material, as required.

G. If irregularities or defects that cannot be corrected remain after final compaction, the affected area will be considered defective.

3.04 DISPOSITION OF MILLED MATERIAL

A. Satisfactorily dispose of the milled material.

END OF SECTION

POLYMER MODIFIED ASPHALT JOINT AND CRACK SEALING

32 01 17.61-1

SECTION 32 01 17.61

1.01 SECTION INCLUDES

A. Asphaltic Joint and Crack Sealing

1.02 DESCRIPTION OF WORK

A. This work includes cleaning and sealing of longitudinal and transverse joints along all curb lines, butt joints and around all utilities.

PART 2 PRODUCTS

2.01 ASPHALT CEMENT CLASS AC-20

A. Obtain material meeting the requirements of PennDOT Bulletin 25 from a producer listed in

Bulletin 15.

1. Quality Control Section 01 40 00

2. Certification

a. General

1) When a bituminous material tank is filled, submit a copy of the required test results to the MTD for verification of compliance with Department specifications.

2) Specify the type of material, tank number, and company lot number of the certificate for cross-reference to the bill of lading.

3) Have a responsible company official sign the certificate.

4) Obtain a verification sample from each batch. A batch is a tank completely filled, partially filled, or refilled with a blend of residual and new material.

5) Test one-half (1/2) sample and forward the results to the MTD. Forward the remaining one-half (1/2) sample to the MTD for testing. The MTD will evaluate quality control on the basis of three (3) consecutive verification samples.

b. Levels of Certification

1) Use the same levels of certification as specified in PennDOT Publication

408, Section 701.1(b)2, except substitute the word “batch” for the word “silo.”

32 01 17.61-2

c. Handling and Transportation, Section 01 60 00

1) Furnish the vendor’s bill of lading for each shipment (one copy retained by the vendor and one copy included with the shipment to the project).

Use a form acceptable to the MTD, containing the following information:

a) Statement that material has been tested and meets Department specifications.

b) Class of Material

c) Tank Number

d) Company Batch Number

e) Date of Shipment

f) Producer’s Name and Location

g) Name and Location of Consignee, (Bituminous Concrete Plant or

Maintenance District)

h) Mix or Application Temperatures, Minimum and Maximum

i) Viscosity at 140F

j) Penetration oat 77F

k) Trailer Number

l) Specific Gravity of Asphalt Cement at 77F

m) Statement that the material is compatible with job aggregate E-4, E-

5, E-10, E-11, E-12, MC-400, and MC-800)

n) Percent Bitumen Residue by Weight (for liquid bituminous materials only)

o) Quality of Material

p) Statement that the shipment container was determined to be reasonably free of contamination immediately prior to loading

PART 3 EXECUTION

3.01 GENERAL

A. Provide a mixture of asphalt cement and reclaimed granulated rubber, combined to the specified proportions, or furnish a premixed composition as specified in Section 469.2(c) or (d).

32 01 17.61-3

3.02 MIXING PROCEDURES

A. Combine the AC-20 and reclaimed granulated rubber to obtain a mixture having proportions of two (2 lbs) pounds of RGR per gallon of asphalt cement. Blend the AC-20 and reclaimed granulated rubber in an oil-jacketed double wall kettle (indirect hating) equipped with agitator and two (2") inch hot asphalt pump. Provide separate thermometers for oil bath. Heat and agitate the mixture with the temperature range of 350F - 380F for thirty (30) minutes. Do not allow the operating temperature in the kettle to exceed 400F.

B. For premixed material, as specified in Section 469.2(c) or (d), obtain the safe heating temperature range and recommended pouring temperature from the manufacturer’s shipping container. Place the material within this temperature range, and as close as possible to the recommended pouring temperature. Maintain a safe heating temperature. Do not maintain any single batch of material at the pouring temperature for more than four (4) hours. Reheat only in accordance with manufacturer’s recommendations.

3.03 SURFACE PREPARATION

A. Apply sealer only after cracks, joints, and adjacent pavement surfaces are clean, dry, and free of any loose material and debris. Clean the pavement for four (4") to six (6") inches on either side of the joint or crack. Air blast cracks and joints immediately prior to sealing. Use a compressed air stream of at least 100 psi measured at the source or use a hot compressed air lance for cleaning and drying damp cracks in the bituminous pavements. Care should be taken to ensure that damage to the surrounding pavement area from overheating does not occur. Seal joints and cracks (1/8) to one (1") inch wide with polymer modified asphalt. Fill joints and cracks more than one (1) inch in width Bituminous Wearing Course, FJ-1, in lieu of sealing.

3.04 SEALING

A. Apply polymer modified asphalt to prepared joints and cracks, level with the pavement surface, using a wand followed by a standard “V” shaped asphalt squeegee. Leave no more than 1/8-inch buildup. Do not place sealer when the air temperature is below 40F or above 90F, unless otherwise permitted by the Engineer if the hot compressed air lance used can sufficiently warm the crack to ensure adhesion between the pavement and the sealer. Do not place bituminous overlay within seventy-two (72) hours of sealing unless permitted by Engineer.

ASPHALT PAVING

32 12 00-1

SECTION 32 12 00

1.01 SECTION DESCRIPTION

A. The Work of this Section Includes:

a. Asphalt paving of roadways and parking lots.

b. The work under this Section shall consist of the application of Warm Mix Asphalt (WMA) binder course, base course, WMA base repair, WMA asphalt tack coat, leveling or scratch coat, WMA wearing course and pavement markings as indicated on plans and as directed by the engineer and in accordance with these specifications, and will generally consist of, but not limited to, the following:

i. Installation of WMA binder or base course

ii. Tack coat application

iii. Installation of leveling course, as directed by Engineer

iv. Application of WMA asphalt wearing course. Sealing of curb, inlets, manholes, valves and pavement joints.

1.02 SYSTEM DESCRIPTION

A. Paving: Virgin Mix, Mix Containing 5% to 15% RAP, designed for traffic anticipated on the roadways.

1.03 RELATED SECTIONS

A. Section not used.

1.04 QUALITY ASSURANCE

A. Reference Standards:

1. Pennsylvania Department of Transportation:

a. Publication 408 Specifications

b. Publication 27 – Specification for Asphalt Mixtures (Bulletin 27)

B. Perform Work in accordance with the latest edition of PennDOT Publication 408.

C. Mixing Plant: Conform to PennDOT Bulletin 27, chapter 1 Standards.

D. Material Suppliers shall be from PennDOT Bulletin 15.

E. Conform to applicable Township standards for paving work on public property.

F. The Contractor shall provide a Job Mix Formula for the project approved by PennDOT’s Materials Manager.

1.05 SUBMITTALS

A. Certificates:

Submit certification from asphalt and aggregate suppliers attesting that materials conform to the State Specifications in accordance with Section 01 33 00.

B. Contractor shall provide a daily Certificate of Compliance (CS 4171) for load out for each day.

1.06 ENVIRONMENTAL REQUIREMENTS

32 12 00-2

A. Do not place asphalt when base surface temperature is less than 40 degrees F or base surface is wet or frozen.

1.07 JOB CONDITIONS

A. Restore existing paving outside the limits of the Work that is damaged by Contractor’s operations, to its original condition at the expense of Contractor.

PART 2 PRODUCTS

2.01 PAVING MATERIALS

A. Asphalt Base Course: PennDOT Superpave (Section 313 of Publication 408).

B. Binder Course: PennDOT Superpave (Section 413 of Publication 408).

C. Wearing Course: PennDOT Superpave (Section 413 of Publication 408).

D. Tack Coat: Emulsified Asphalt, Class AE-T (Section 702 of Publication 408).

E. Joint Seal: Hot, Asphalt material [PG 64S-22] (Section 702 of Publication 408).

2.02 SUBBASE COURSE MATERIALS

A. Coarse Aggregate: PennDOT No. 2A (Section 703 of Publication 408).

2.03 PAINTING MATERIALS

A. Section 962, PennDOT Publication 408.

PART 3 EXECUTION

3.01 EXAMINATION AND PREPARATION

A. Verify gradients and elevations of area to be paved.

B. Trim existing paving with minimum one (1) foot cutbacks to remove damaged areas. Cut straight joint lines and right-angle offsets.

C. Remove any temporary paving material.

D. Proof roll subgrade (10-ton roller) and replace any soft or unsuitable material with coarse aggregate.

Verify compacted subgrade is dry and ready to support paving and imposed loads.

E. Apply tack coat in accordance with PennDOT Publication 408 requirements prior to placing an overlay over existing paving or prior to placing a wearing course over a previous placed binder course.

F. Coat surfaces of any manhole or catch basin frames with oil to prevent bond with asphalt paving.

3.02 SUBBASE COURSE

A. Place PennDOT No. 2A coarse aggregate in continuous layers not exceeding 6 inches loose depth and compact (10-ton roller) to required contours and elevations.

3.03 PLACING ASPHALT PAVEMENT

A. Place asphalt base course on surface of compacted subbase course to compacted thickness (10-ton roller where possible; minimum 5-ton roller in trenches) as shown on Drawings.

B. Place binder and wearing courses to compacted thicknesses (10-ton roller except minimum 5-ton roller for binder course in trenches) as shown on the Drawings. Apply tack coat on completed binder course before placing wearing course should there be a delay between completion of binder course and placement of wearing course.

C. Place wearing course overlay to compacted thickness (10-ton roller) as and where shown on the Drawings.

D. Compact pavement by rolling to achieve even and smooth finish, without roller marks. Hand

32 12 00-3 compact in areas inaccessible to rolling equipment.

E. Where proposed asphalt paving adjoins existing asphalt paving, seal the joint with hot Asphalt material in accordance with PennDOT Publication 408 requirements.

F. Provide painted markings where shown on Drawings.

3.04 TOLERANCES

A. Flatness: Maximum variation of 1/4 inch measured with 10-foot straight edge.

B. Compacted Scheduled Thickness: Within 1/4 inch of design thickness.

C. Variation from True Elevation: Within 1/2 inch.

THERMOPLASTIC TRAFFIC LINES AND MARKINGS

32 17 23.33-1

SECTION 32 17 23.14

PAINTED PAVEMENT MARKINGS

1.01 DESCRIPTION OF WORK

A. This Work is the application of traffic lines and pavement markings.

PART 2 PRODUCTS

2.01 MATERIALS

A. Materials used shall be in accordance with Section 962 of PennDOT Publication 408, or most current publication.

PART 3 EXECUTION

3.01 GENERAL

A. Apply in accordance with applicable 67 Pa Code and PennDOT standards.

B. Employ traffic control measures in accordance with MUTCD Chapter 6 and PennDOT Publication

213, Work Zone Traffic Control Manual, at all times.

C. Construction shall be in accordance with PennDOT Publication 111, Traffic Control – Pavement

Markings and Signing Standards

3.02 EQUIPMENT

A. Line Application: Use a machine that is capable of:

a. Applying 4-inch parallel lines, in either solid or broken patterns or various combinations thereof.

b. Automatically and continuously measuring the length of each line placed ot the closet linear foot.

B. Legend Application: This includes crosswalks, intersections, stop lines, and other miscellaneous items. Legend application shall not be performed with hand brushes or rollers.

C. Application Rates

a. Paint: Dispense in a wet film thickness of 15 mils, except at edge which may be 12 mils.

D. Surface Preparation: Clean and dry roadway surface at the direction of Engineer. Blow or sweep any loose dirt or debris from roadway.

E. Temperature Restrictions: Do not apply any type of pavement markings when the temperature is below 40F.

F. Protection of Painted Surfaces

a. Type 1 Conventional Traffic Paint: Provide satisfactory protection for center lines, lane lines, edge lines, crosswalks, stop bars, symbols and legends for at least 30 minutes or until paint is fry and track free from vehicular traffic.

b. Type II Low Heat Traffic Paint: Provide satisfactory protection for center lines, lane lines, edge lines until the paint is dry and track free from vehicular traffic.

c. Repaint marked or damaged areas as directed by Engineer.

G. Defective Work: Remove any traffic markings which are incorrectly placed as directed by Engineer.

SECTION 31 20 00

EARTHWORK

PART 1 – GENERAL

1.01 SECTION DESCIPTION

A. Site grading, removal of topsoil and subsoil, building excavating and backfill.

B. Preparing of subgrade for site structures, walks and pavements.

1.02 RELATED INFORMATION

A. Related Work Specified Elsewhere:

1. Section 01 57 13: Soil Erosion and Sediment Control

2. Section 31 11 00: Clearing and Grubbing

3. Section 31 23 16: Rock Removal

4. Section 31 23 33: Excavation, Backfill and Compaction

5. Section 32 12 00: Bituminous Concrete Paving

6. Section 32 93 00: Landscaping

1.03 QUALITY ASSURANCE

A. Testing Agency

1. Any required compaction testing for this Project shall be performed by a soils testing agency engaged and paid for by Contractor and approved by Engineer.

B. Reference Standards:

1. Pennsylvania Department of Transportation Publication 408 Specifications

2. American Society for Testing and Materials (ASTM):

ASTM 0422 Test Method for Particle-Size Analysis of Soils

ASTM 01557 Test Method for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft.-lbf/ft3)

ASTM 02922 Standard Test Method for Density of Soil and Soil Aggregate in Place by Nuclear Methods (Shallow Depth)

ASTM 04318 Test Method for Liquid Limit, Plastic Limit, and Plasticity Index of Soils

C. Compaction Testing:

1. Conduct compaction tests at locations as directed by the Resident Project

Representative during grading operations.

2. Determine compaction in areas other than State highways and shoulders by the testing procedure contained in ASTM 02922 based on previously determined compaction curve data as established by ASTM 01557.

1.04 SUBMITTALS

A. Submit certified test reports on borrow material. Test reports shall include grain size distribution (ASTM 0422), Atterberg limits (ASTM 04318) and moisture density relationship (ASTM 01557).

B. Submit certified compaction testing results from the soils testing agency for any required compaction testing.

1.05 JOB CONDITIONS

A. All earthwork shall be performed in accordance with conditions outlined in Section 01 57 13, Soil Erosion and Sedimentation Control and the Drawings.

B. Site disturbance and earth moving shall proceed in accordance with the sequence shown on the Drawings.

C. Contractor may conduct earthwork activities within the contract limit lines as shown on the Drawings.

D. Prior to earth moving activities, all topsoil shall be stripped and stockpiled in accordance with Section 31 11 00 and the Drawings.

E. Classification of Excavation:

1. All excavation work performed under this contract is UNCLASSIFIED.

PART 2 – PRODUCTS

2.01 SOIL MATERIALS

A. Topsoil: Excavated or imported friable loam that is reasonably free of subsoil, clay lumps, brush, roots, weeds, other objectionable vegetation, stones or other foreign material.

B. Subbase Material: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand.

C. Drainage Fill: Washed, evenly graded mixture of crushed stone, or crushed or uncrushed gravel, with 100 percent passing a 1-1/2 inch sieve and not more than 5 percent passing a No.

8 sieve. PennDOT No. 2B or AASHTO No. 57 coarse aggregate, Table C, Section 703.2, Publication 408 Specifications.

D. Fill Materials: Satisfactory on-site soil materials comprised of less than 40% by weight larger than 3/4 inches in diameter, free of particles larger than 4 inches, and free of debris, slag, waste, frozen material, excessive moisture, organics, or other deleterious material.

PART 3 – EXECUTION

3.01 STORAGE OF EXCAVATION MATERIALS

E. Stockpile excavated materials acceptable for backfill and fill. Place, grade and shape stockpiles for proper drainage.

1. Locate and retain soil materials away from edge of excavations. Do not store within drip line of trees indicated to remain.

2. Dispose of excess excavated soil material and materials not acceptable for use as backfill or fill.

3.02 EXCAVATION FOR SITE STRUCTURES

A. Conform to elevations and dimensions shown within a tolerance of plus or minus 0.10 foot, and extending a sufficient distance from site structures to permit placing and removal of concrete formwork, installation of services, and other construction and for inspection. In the event that fill deposits or other unsuitable bearing materials are encountered at the given elevations, they shall be over-excavated and replaced with structural backfill as specified hereinafter.

1. Excavations for site structures: Do not disturb bottom of excavation. Excavate by hand to final grade just before concrete reinforcement is placed. Trim bottoms to required lines and grades to leave solid base to receive other work.

B. In the event bedrock is encountered at the footing subgrade elevation, it shall be overexcavated to a level 12 inches below the plan site structure subgrade elevation and 12 inches beyond the perimeter of the site structure on all sides. Bedrock encountered within four (4) inches of the base of the site structure shall be removed to at least six (6) inches below the base elevation for the site structure. The overexcavations specified above shall be restored to the subgrade elevation with PA No. 2A or 2RC processed aggregate which is placed and compacted as specified hereinafter.

C. Any soft, weak and/or unstable soil encountered at the footing subgrade elevation shall be overexcavated to satisfactory bearing material. Subsequently, the overexcavation shall be backfilled to the plan subgrade elevation with either lean concrete or PA No. 2A or 2RC processed aggregate.

3.03 EXCAVATION FOR PAVEMENTS

A. Cut surface under pavements to comply with cross-sections, elevations and grades as indicated.

3.04 COLD WEATHER PROTECTION

A. Protect excavation bottoms against freezing when atmospheric temperature is less than 35 degrees F.

3.05 BACKFILL AND FILL

A. General: Place soil material in layers to required subgrade elevations, for each area classification listed below, using materials specified in Part 2 of this Section.

1. Under grassed area, use satisfactory excavated or borrow material.

2. Under walks and pavements, use subbase material, satisfactory excavated or borrow material, or a combination.

3. Under steps, use subbase material.

4. Under site structures, use drainage fill material for 6" or 8" drainage course as shown on the Drawings. Below drainage course, provide satisfactory soil material.

5. For utility and pipe trenches see Section 31 23 33.

B. Backfill site structure excavation as promptly as work permits, but not until completion of the following:

1. Acceptance of construction below finish grade including, where applicable, dampproofing, water proofing and perimeter insulation.

2. Removal of concrete formwork.

3. Removal of shoring and bracing, and backfilling of voids with satisfactory materials.

Cut off temporary sheet piling driven below bottom of structure and remove in manner to prevent settlement of the structure, or leave in place if required.

4. Removal of trash and debris from excavation.

5. Permanent or temporary horizontal bracing is in place on horizontally supported walls.

3.06 PLACEMENT AND COMPACTION

A. Ground Surface Preparation: Remove vegetation, debris, unsatisfactory soil materials, obstructions, pavement sections, topsoil and organic and deleterious materials from ground surface prior to placement of fills (See Section 31 11 00). Plow, strip, or break up sloped surfaces steeper than 1 vertical to 4 horizontal so that fill material will bond with existing surface.

1. When existing ground surface has a density less than that specified under 3.06.E. for particular area classification, break up ground surface, pulverize, moisture-condition to optimum moisture content, and compact to required depth and percentage of maximum density.

2. After stripping and rough excavation grading, areas to provide support for the foundations, floor slab, structural fill and pavement shall be carefully inspected for soft surficial soils and proofrolled with a fully loaded triaxle dump truck or similar approved equipment. Proofrolling shall be performed under the observation of the soils testing agency. The proofroller shall make at least eight passes over each location, with the last two passes perpendicular to the first two. Any areas which wave, rut or deflect excessively and continue to do so after several passes of the proofroller shall be undercut to stable soils or as directed by the geotechnical engineer. The undercut areas shall be backfilled in thin lifts with suitable compacted refill materials.

3. The stripping and proofrolling operations shall be delayed in areas where the construction will not proceed immediately to a finished surface so that the exposed subgrade will not deteriorate under the effects of weather and construction traffic.

B. Place backfill and fill materials in layers not more than 8 inches in loose thickness for material compacted by heavy compaction equipment, and not more than 6 inches in loose thickness for material compacted by hand-operated tampers.

C. Before compaction, moisten or aerate each layer as necessary to provide optimum moisture content. Compact each layer to required percentage of maximum dry density or relative dry density for each area classification. Do not place backfill or fill material on surfaces that are muddy, frozen or contain frost or ice.

D. Place backfill and fill materials evenly adjacent to structures to required elevations. Prevent wedging action of backfill against structures by carrying material uniformly around structure, piping or conduit to approximately same elevation in each lift.

E. Control soil and fill compaction, providing minimum percentage of density specified for each area classification indicated below. Correct improperly compacted areas or lifts as directed by Resident Project Representative if soil density tests indicate inadequate compaction.

1. Percentage of Maximum Density Requirements: Compact soil to not less than the following percentages of maximum dry density, in accordance with ASTM D1557 (Modified Proctor):

a. Under structures, building slabs and steps, and pavements, compact top 12 inches of subgrade and each layer of backfill or fill material at 95% (Modified Effort) of the maximum density, at or near the optimum moisture content.

b. Non-structural areas which lie within five (5) feet of building, pavement and structural areas at 93% (Modified Effort) of the maximum density at or near the optimum moisture content.

c. Detention basin berms, compact each layer of fill material at 95% (Modified Effort) of the maximum density, at or near the optimum moisture content.

d. Under lawn or unpaved areas, compact top 6 inches of subgrade and each layer of backfill or fill material at 90% (Modified Effort) of the maximum density at or near the optimum moisture content.

e. Under walkways, compact top 6 inches of subgrade and each layer of backfill or fill material at 93% (Modified Effort) of the maximum density, at or near the optimum moisture content.

2. Moisture Control: Where subgrade or layer of soil material must be moisture conditioned before compaction, uniformly apply water to surface of subgrade or layer of soil material. Apply water in minimum quantity as necessary to prevent free water from appearing on surface during or subsequent to compaction operations.

a. Remove and replace, or scarify and air dry, soil material that is too wet to permit compaction to specified density.

b. Stockpile or spread soil material that has been removed because it is too wet to permit compaction. Assist drying by discing, harrowing or pulverizing until moisture content is reduced to a satisfactory value.

3.07 GRADING

A. General: Uniformly grade areas within limits of grading under this section, including adjacent transition areas. Smooth finished surface within specified tolerances, compact with uniform levels or slopes between points where elevations are indicated or between such points and existing grades.

B. Grading Outside Building Lines: Grade areas adjacent to building lines to drain away from structures and to prevent low points as shown on the Drawings. Finish surfaces free from irregular surface changes and as follows:

1. Lawn or Unpaved Areas: Finish areas to receive topsoil to within not more than 0.10 foot above or below required subgrade elevations.

2. Walks: Shape surface of areas under walks to line, grade and cross section, with finish surface not more than 0.10 foot above or below required subgrade elevation.

3. Pavements: Shape surface of areas under pavement to line, grade and cross section, with finish surface not more than 1/2 inch above or below required subgrade elevation.

C. Grading Surface of Fill under Site Structure Slabs: Grade smooth and even, free of voids, compacted as specified, and to required elevation. Provide final grades within a tolerance of ½ inch when tested with a 10-foot straightedge.

D. Compaction: After grading, compact subgrade surfaces to the depth and indicated percentage of maximum or relative density for each area classification.

3.08 SITE STRUCTURE SLAB DRAINAGE COURSE

A. General: Drainage course consists of placement of drainage fill material, in layers of indicated thickness over subgrade surface to support concrete site structure slabs.

B. Placing: Place drainage fill material on prepared subgrade in layers of uniform thickness, conforming to indicated thickness.

1. When compacted drainage course is indicated to be 6 inches thick or less, place material in a single layer. When indicated to be more than 6 inches thick, place material in equal layers, except no single layer more than 6 inches or less than 3 inches in thickness when compacted.

3.09 EROSION CONTROL

A. Provide erosion control methods in accordance with Section 01 57 13 and the Drawings.

3.10 MAINTENANCE

A. Protection of Graded Areas: Protect newly graded areas from traffic and erosion. Keep free of trash and debris.

B. Repair and re-establish grades in settled, eroded and rutted areas to specified tolerances.

C. Reconditioning Compacted Areas: Where completed compacted areas are disturbed by subsequent construction operations or adverse weather, scarify surface, reshape and compact to required density prior to further construction.

D. Settling: Where settling is measurable or observable at excavated areas during general project warranty period, remove surface (pavement, lawn or other finish), add backfill material, compact and replace surface treatment. Restore appearance, quality and condition of surface or finish to match adjacent work, and eliminate evidence of restoration to greatest extent possible.

3.11 DISPOSAL OF EXCESS AND WASTE MATERIALS

A. Removal from Owner's Property: Remove waste materials, including unacceptable excavated material, trash and debris, and dispose of it off Owner's property.