4-3. Project Technical Specifications (RFP 26-029C).pdf

TABLE OF CONTENTS Page 1 of 1

TABLE OF CONTENTS

DIVISION 23 - HEATING, VENTILATING, AND AIR-CONDITIONING (HVAC)

23 02 00 BASIC MATERIALS AND METHODS FOR HVAC

23 03 00 MECHANICAL DEMOLITION FOR REMODELING

23 09 63 ENERGY MANAGEMENT AND CONTROL SYSTEM (EMCS)

DIVISION 26 - ELECTRICAL

26 02 00 BASIC MATERIALS AND METHODS FOR ELECTRICAL

26 03 00 DEMOLITION WORK

26 03 13 ELECTRICAL DEMOLITION FOR REMODELING

26 05 19 WIRE, CABLE AND RELATED MATERIALS

26 05 26 GROUNDING

26 05 33 RACEWAYS

26 06 34 LOW VOLTAGE RACEWAY SYSTEM

26 09 36 LIGHTING CONTROLS (STAND-ALONE)

26 24 16 PANELBOARDS

26 27 26 WIRING DEVICES

26 28 16 SAFETY AND DISCONNECT SWITCHES

26 29 01 MOTORS AND STARTERS

26 29 13 MOTOR STARTERS

26 29 26 MISCELLANEOUS ELECTRICAL CONTROLS AND WIRING

26 43 13.13 SURGE PROTECTIVE DEVICES (SPD) - STANDARD

INTERRUPTING

26 51 19 LIGHTING FIXTURES - LIGHT EMITTING DIODE (LED)

DIVISION 27 - COMMUNICATIONS

27 02 00 BASIC MATERIALS AND METHODS FOR COMMUNICATIONS

SYSTEMS

27 05 26 GROUNDING AND BONDING FOR COMMUNICATIONS SYSTEMS

27 05 28 PATHWAYS FOR COMMUNICATIONS SYSTEMS

27 05 43 UNDERGROUND DUCTS AND RACEWAYS FOR

COMMUNICATIONS SYSTEMS

27 13 00 COMMUNICATIONS BACKBONE CABLING

27 15 00 COMMUNICATIONS HORIZONTAL CABLING

DIVISION 28 - ELECTRONIC SAFETY AND SECURITY

28 02 00 BASIC MATERIALS AND METHODS FOR SAFETY AND SECURITY

SYSTEMS

28 10 00 ACCESS CONTROL SYSTEM

Clemens New Parking Lot Bid Documents

Division 31 – Earthwork

31 1000 Site Clearing 31 2300 Excavation and Fill 31 2323 Flowable Fill

Division 32 – Exterior Improvements

32 1216 Hot Mix Asphalt Paving 32 1313 Portland Cement Concrete Paving 32 1340 Concrete Paving Joint Sealants 32 1723 Pavement Markings 32 3111 Swing Gate Operators 32 3113 Chain Link Fencing and Gates

JASON W. HUBBERT

91839PROFESS IO NA L ENGINEERL I C E N S E D

STA TE OF T EX A S

10/30/2026

SITE CLEARING 31 1000 1-4

SECTION 31 1000

SITE CLEARING

PART 1 - GENERAL

1.01 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.02 SUMMARY

A. Section Includes:

1. Protection of existing trees.

2. Removal of trees and other vegetation.

3. Topsoil stripping, stockpiling, and spreading.

4. Clearing and grubbing.

5. Removing designated paving, curbs, and sidewalks.

6. Removing above-grade improvements.

7. Removing below-grade improvements.

8. Disconnecting, capping, or sealing, and abandoning site utilities in place and/or removing site utilities.

B. Related Sections:

1. Section 31 2300, Excavation and Fill.

1.03 DEFINITIONS

A. Topsoil: Natural or cultivated surface-soil layer containing organic matter and sand, silt, and clay particles; friable, pervious, and black or a darker shade of brown, gray, or red than underlying subsoil; reasonably free of subsoil, clay lumps, gravel, and other objects more than 2 inches in diameter; and free of subsoil and weeds, roots, toxic materials, or other non-soil materials.

B. Tree Protection Zone: Area surrounding individual trees or groups of trees to be protected during construction, and defined by the drip line of individual trees or the perimeter drip line of groups of trees, unless otherwise indicated. The City of San Antonio defined root protection zone shall be an area defined by an average radius extending outward from the trunk of the tree a distance of one (1) linear foot for each inch diameter measured at breast height (4.5’) of the tree.

1.04 MATERIAL OWNERSHIP

A. Except for stripped topsoil or other materials indicated to remain Owner's property, cleared materials shall become Contractor's property and shall be removed from Project site.

1.05 SUBMITTALS

A. When required by Owner or Architect/Engineer, Provide Transport and Disposal Manifests for all waste removed from the site.

B. Product Data: Submit data for herbicide. Indicate compliance with applicable codes for environmental protection.

C. Photographs or videotape, sufficiently detailed, of existing conditions of trees and plantings, adjoining construction, and site improvements that might be misconstrued as damage caused by site clearing.

SITE CLEARING 31 1000 2-4

D. Record drawings according to Division 01 Section "Project Record Documents," identifying and accurately locating capped utilities and other subsurface structural, electrical, and mechanical conditions.

1.06 QUALITY ASSURANCE

A. Pre-installation Conference: Conduct conference at Project site to comply with requirements in Division 01 Section "Administrative requirements."

1.07 APPLICABLE CODES AND REGULATIONS

A. Contractor shall be responsible for complying with applicable permits for all site work.

B. The Owner will not be a party to any condition where soil contamination, either new or existing, will be allowed to remain. All entities shall be familiar with and comply with federal, state, and local laws and regulations regarding soil contamination. Any existing contamination found or any new contamination shall be reported to the Architect/Engineer and the Owner.

C. The Owner will not be a party to offsite pollution. All entities shall be familiar with and comply with EPA “National Pollutant Discharge Elimination System” regulations.

D. All disposal other than approved topsoil disposal shall be done offsite and lawfully. Permits and disposal fees shall be the responsibility of the Contractor.

E. All applicable laws, codes, regulations, ordinances and requirements of all authorities having Jurisdiction, including but not limited to TCEQ and the Edwards Aquifer Authority.

PART 2 - PRODUCTS

2.01 MATERIALS

A. Herbicide: Type approved by authority having jurisdiction, when use of herbicides is permitted.

PART 3 - EXECUTION

3.01 EXAMINATION and PROJECT CONDITIONS

A. Traffic: Conduct site-clearing operations to ensure minimum interference with roads, streets, walks, and other adjacent occupied or used facilities. Do not close or obstruct streets or other used facilities without permission from authorities having jurisdiction.

B. Protection of Existing Improvements: Provide protection necessary to prevent damage to existing improvements indicated to remain in place.

C. Protect improvements on adjoining properties and on Owner's property.

D. Restore damaged improvements to their original condition, as acceptable to property owners.

E. Protect bench marks, survey control points, and existing structures to remain from damage or displacement.

F. Protection of Existing Trees and Vegetation: Protect existing trees and other vegetation indicated to remain in place against unnecessary cutting, breaking or skinning of roots, skinning or bruising of bark, smothering of trees by stockpiling construction materials or excavated materials within drip line, excess foot or vehicular traffic, or parking of vehicles within drip line. Provide temporary guards to protect trees and vegetation to be left standing.

G. Water trees and other vegetation to remain within limits of contract work as required to maintain their health during course of construction operations.

H. Provide protection for roots over 1-1/2 inch in diameter that are cut during construction operations. Coat cut faces with an emulsified asphalt or other acceptable coating formulated for use on damaged plant tissues. Temporarily cover exposed roots with wet burlap to prevent roots from drying out; cover with earth as soon as possible.

SITE CLEARING 31 1000 3-4

I. Repair or replace trees and vegetation indicated to remain which are damaged by construction operations in a manner acceptable to Architect/Engineer.

J. Salvable Improvements: Carefully remove items indicated by Architect/Engineer Project Manager to be salvaged, and store on Owner’s premises where indicated or directed.

3.02 PREPARATION

A. Call Local Utility Purveyors for line information not less than ten working days before performing Work.

1. Request underground utilities to be located and marked within and surrounding construction areas.

2. Local Utility Locator contact numbers include:

a. Water and Sewer: City of Schertz.

b. Recycled Water: Cibolo Creek Municipal Authority

c. Texas State Wide One Call Locator, 1-800-545-6005.

d. Gas and Electric: City Public Service, 1-800-545-6005.

e. Telephone Service: AT&T. 1-800-545-6005.

f. Cable Service: Spectrum Cable, 1-800-545-6005.

3.03 CLEARING

A. General: Remove trees, shrubs, grass and other vegetation, improvements, or obstructions as required to allow installation of new construction. Remove similar items elsewhere on site or premises as specifically indicated.

“Removal” includes digging out and off-site disposal of stumps and roots to a depth of 1.5’ below subgrade.

B. Use necessary means to prevent spread of dust during the project construction. Moisten surfaces as required to prevent dust from being a nuisance to the public, neighbors, and concurrent performance of other work on site.

C. Cut minor roots and branches of trees indicated to remain in a clean and careful manner where such roots and branches obstruct installation of new construction.

D. Clearing and Grubbing: Clear site of trees, shrubs, and other vegetation, except for those indicated to be left standing by the Architect/Engineer or the Project Manager and or adjoining the project site. In the event of damage to any existing objects designated to remain, contractor shall repair or replace at no additional cost to the Owner.

E. Removal of stumps, roots, and other debris shall be required of all areas of excavation to a depth of 18" below the excavation elevation. On areas of embankment, stumps, roots and other debris shall be removed to a depth of 18" below the existing ground surface. The contractor shall accomplish this requirement by root plowing, raking, piling and proper disposal.

F. Use only hand methods for grubbing inside drip line of trees indicated to remain.

G. Fill depressions caused by clearing and grubbing operations with satisfactory soil material, unless further excavation or earthwork is indicated.

H. Place fill material in horizontal layers not exceeding 8" loose depth, and thoroughly compact to a density equal to adjacent original ground.

I. All areas requiring backfill such as abutting to curbs shall have a minimum 5:1 slope ratio unless otherwise indicated. The backfill material used shall be obtained from approved sources and suitable to support plant growth. It will be fertile loam, easily cultivated, and free from roots, weeds, stones, or other objectionable material.

J. Removal of Improvements: Remove existing above-grade and below-grade improvements as indicated and as necessary to facilitate new construction. The project drawings do not purport to show all objects existing on the

SITE CLEARING 31 1000 4-4

project site. The contractor shall be responsible for verifying all objects to be removed, adjusted or preserved before his start of work.

K. When required and allowed by the Owner, apply herbicide to any remaining stumps to inhibit growth.

3.04 REMOVAL

A. Remove debris, rock, extracted plant life, and demolished materials from site.

B. Remove designated paving, curbs, and sidewalks as indicated on the Drawings. Neatly saw cut edges at right angle to surface.

C. Remove abandoned utilities. Indicate removal termination point of underground utilities on Record Documents.

D. Continuously clean-up and remove waste materials from site. Do not allow materials to accumulate on site.

E. Do not burn or bury materials on site. Leave site in clean condition.

F. Removal from Owner’s property: Remove waste materials from Owner’s property. All off-site transport and disposal of waste shall be the sole responsibility of the Contractor and shall be performed within all legal and applicable laws and regulations.

G. Provide manifest for off-site transport and disposal of wastes.

3.05 TOPSOIL STRIPPING, STOCKPILING, AND RE-PLACEMENT

A. Strip excavate topsoil from areas to be further excavated, and otherwise identified on the Drawings, without mixing with foreign materials for use in finish grading. Do not excavate wet topsoil.

B. Topsoil Stripping: Topsoil shall be stripped from the existing surface soil after vegetation and trees have been removed. Where existing trees are indicated to remain, leave existing surface soil in place within drip lines to prevent possible damage to root systems.

C. Striping of topsoil shall be accomplished by the following procedure: In areas requiring less than 3" of cut or fill, stripping of topsoil shall not be done. In areas of more than 3" of cut or fill, topsoil may be stripped to whatever depths it is encountered, but not to exceed 12", in a manner to prevent intermingling with underlying subsoil or other objectionable material. Areas with more than 3" of cut, the contractor shall “over excavate” 6" below finish grade and replace with 6" of topsoil. In areas requiring more than 6" of fill, the top 6" shall be topsoil.

D. Stockpile topsoil in storage piles in areas indicated or as directed by the Architect/Engineer to depth not exceeding eight feet and protect from erosion. Construct storage piles to provide free drainage of surface water.

E. Topsoil shall be placed and spread in the areas required with a depth of not less than 6". Once the topsoil has been placed and spread, it shall be compacted to 82 - 88% of maximum density as determined by the Texas Department of Transportation (TxDOT) test method, TEX-114E. Final grading of topsoil shall be accomplished by placing grade stakes (blue tops) on a maximum 50' grid to ensure proper grade control.

For use of on-site topsoil, the following shall apply:

1. After proper compaction and final grading, the surface shall be tilled with a “landscape rake” to remove rocks, roots, or other objectionable material larger than 3/4". This machine shall gently till the top 1" of soil, breaking up clumps and clods, leveling uneven ground, and preparing the topsoil surface for turf or landscape installation.

2. The “landscape rake” shall consist of Model 5A or 6A attachment equipment manufactured by “Bobcat” to be mounted on traditional “Bobcat” skid-steer loaders. Similar equipment may be used with approval of the Architect/Engineer.

F. Dispose of unsuitable or excess topsoil as specified for disposal of waste material.

END OF SECTION 31 1000

EXCAVATION AND FILL 31 2300 1-13

SECTION 31 2300

EXCAVATION AND FILL

PART 1 - GENERAL

1.01 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.02 SUMMARY

A. Section Includes:

1. Preparing subgrades for slabs-on-grade, walks, pavements, lawns and grasses, and exterior plants.

2. Excavating and backfilling for buildings and structures.

3. Drainage course for slabs-on-grade.

4. Subbase course for concrete walks and pavements.

5. Subbase and base course for asphalt and concrete paving.

6. Subsurface drainage backfill for walls and trenches.

7. Excavating and backfilling for utility trenches.

8. Excavating and backfilling trenches for buried mechanical and electrical utilities and pits for buried utility structures.

9. Excavating and Fill for landscaping.

10. Dewatering Systems for excavations and trenches.

11. Topsoil for turf and landscaping.

B. Related Sections:

1. Section 31 1000 – Site Clearing

2. Section 31 2323 – Flowable Fill

3. Section 32 1216 – Hot Mix Asphalt Paving

4. Section 33 1113 – Water Systems

5. Section 33 3100 – Sanitary Sewerage

6. Section 33 4100 – Storm Sewerage

7. Section 32 1313 – Portland Cement Concrete Paving

1.03 DEFINITIONS

A. Backfill: Soil material or controlled low-strength material used to fill an excavation.

1. Initial Backfill: Backfill placed beside and over pipe in a trench, including haunches to support sides of pipe.

2. Final Backfill: Backfill placed over initial backfill to fill a trench.

B. Base Course: Course placed between the subgrade or subbase course and hot-mix asphalt paving or concrete paving.

EXCAVATION AND FILL 31 2300 2-13

C. Bedding Course: Course placed over the excavated subgrade in a trench before laying pipe.

D. Borrow Soil: Satisfactory soil imported from off-site for use as fill or backfill.

E. Drainage Course: Course supporting the slab-on-grade that also minimizes upward capillary flow of pore water.

F. Excavation: Excavation consists of the removal of rock or soil material encountered to subgrade elevations and the reuse or disposal of materials removed.

1. Authorized Additional Excavation: Excavation below subgrade elevations or beyond indicated lines and dimensions as directed by Architect/Engineer.

2. Unauthorized Excavation: Excavation below subgrade elevations or beyond indicated lines and dimensions without direction by Architect/Engineer. Unauthorized excavation, as well as remedial work directed by Architect/Engineer, shall be without additional compensation.

G. Fill: Soil materials used to raise existing grades.

H. Structures: Buildings, footings, foundations, retaining walls, slabs, tanks, curbs, mechanical and electrical appurtenances, or other man-made stationary features constructed above or below the ground surface.

I. Subbase Course: Course placed between the subgrade and base course for hot-mix asphalt pavement, or course placed between the subgrade and a cement concrete pavement or a cement concrete or hot-mix asphalt walk.

J. Subgrade: Surface or elevation remaining after completing excavation, or top surface of a fill or backfill immediately below subbase, drainage fill, or topsoil materials.

K. Utilities: On-site underground pipes, conduits, ducts, and cables, as well as underground services within buildings.

L. Dewatering: Dewatering includes the following:

1. Lowering of ground water table and intercepting horizontal water seepage to prevent ground water from entering excavations, trenches, tunnels, or shafts.

2. Reducing piezometric pressure within strata to prevent failure or heaving of excavations, trenches, tunnels, or shafts.

3. Disposing of removed water.

1.04 REFERENCES

A. ASTM International and TxDOT:

1. ASTM D698 - Standard Test Method for Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 ft-lbf/ft3 (600 kN-m/m3)).

2. ASTM D1556 - Standard Test Method for Density of Soil in Place by the Sand-Cone Method.

3. ASTM D2167 - Standard Test Method for Density and Unit Weight of Soil in Place by the Rubber Balloon Method.

4. ASTM D6938 - Standard Test Method for Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth).

5. ASTM D3017 – Moisture Content of Soil and Soil Aggregates in place by Nuclear Methods.

6. ASTM D1557 - Standard Test Method for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3 (2,700 kN-m/m3)).

7. ASTM D2487 - Standard Classification of Soils for Engineering Purposes (Unified Soil Classification System).

EXCAVATION AND FILL 31 2300 3-13

8. ASTM C136 - Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates.

9. ASTM D4318 - Standard Test Method for Liquid Limit, Plastic Limit, and Plasticity Index of Soils.

B. TxDOT – Standard Material and Testing Specifications

C. Local utility standards when working within 24 inches of utility lines.

1.05 SUBMITTALS

A. Excavation Protection Plan: Describe sheeting, shoring, and bracing materials and installation required to protect excavations and adjacent structures and property; include structural calculations to support plan.

B. Dewatering Plan: Describe dewatering equipment, associated pumps piping, valves and appurtenances, wells and well points, monitoring wells and piezometers, groundwater table elevation reduction rates, influence zones and associated pumping flow rates, backup equipment and systems, and groundwater treatment and disposal plan.

C. Product data for the following:

1. Flexible base material.

2. Sand and Gravel material.

3. Topsoil.

4. Each type of plastic warning tape.

5. Filter fabric, if applicable.

6. Samples of the following:

a. 20-lb samples, sealed in air-tight containers, of each proposed fill and backfill soil material from on-site or borrow sources.

b. 12-by-12-inch sample of filter fabric.

D. Test Reports: In addition to test reports required under field quality control, submit the following:

1. Laboratory analysis of each soil material proposed for fill and backfill from on-site and borrow sources.

One optimum moisture-maximum density curve for each soil material.

2. Report of actual unconfined compressive strength and/or results of bearing tests of each stratum tested.

3. Laboratory analysis of each base material proposed for fill and backfill from on-site and borrow sources.

One optimum moisture-maximum density curve for each soil material.

1.06 QUALITY ASSURANCE

A. Codes and Standards: Perform earthwork complying with requirements of authorities having jurisdiction.

B. Testing and Inspection Service: The Owner will employ a qualified independent geotechnical engineering testing agency to classify proposed on- site and borrow soils to verify that soils comply with specified requirements and to perform required field and laboratory testing.

C. Profile check for gravity utility facilities: Contractor shall check design inverts, slopes, and distances to ensure positive grades and consistent design information prior to utility construction initiation. Contractor shall notify Architect/Engineer if any discrepancies or irregularities are discovered.

D. Pre-installation Conference: Conduct conference at Project site to comply with requirements of Division 01 Section "Project Meetings."

E. Before commencing earthwork, meet with representatives of the governing authorities, Owner, Architect/Engineer, consultants, Geotechnical Engineer, independent testing agency, and other concerned

EXCAVATION AND FILL 31 2300 4-13

entities. Review earthwork procedures and responsibilities including testing and inspection procedures and requirements. Notify participants at least 3 working days prior to convening conference. Record discussions and agreements and furnish a copy to each participant.

1.07 QUALIFICATIONS

A. Prepare excavation protection plan under direct supervision of Professional Architect/Engineer experienced in design of this Work and licensed in State of Texas.

B. Dewatering System Installer: Company specializing in performing dewatering work with minimum of 10 years documented experience, and responsible for design, operation, and maintenance of dewatering system.

1. Assume sole responsibility for dewatering and surface water control systems and for loss or damage resulting from partial or complete failure of protective measures and settlement or resultant damage caused by ground water control operations.

2. Design, install, and monitor operation of dewatering under direct supervision of Professional Architect/Engineer experienced in design of this Work and licensed in State of Texas.

1.08 PROJECT CONDITIONS

A. Existing Utilities: Do not interrupt existing utilities serving facilities occupied by the Owner or others except when permitted in writing by the Architect/Engineer and then only after acceptable temporary utility services have been provided.

1. Notify Architect/Engineer not less than two days in advance of proposed utility interruptions.

2. Do not proceed with utility interruptions without Architect's/Engineer’s written permission.

3. Contact utility-locator service for area where Project is located before excavating.

B. Provide a minimum 48-hours' notice to the Architect/Engineer and receive written notice to proceed before interrupting any utility.

C. Demolish and completely remove from site existing underground utilities indicated to be removed. Coordinate with utility companies to shutoff services if lines are active.

PART 2 - PRODUCTS

2.01 SOIL MATERIALS

A. General: Provide approved borrow soil materials from off-site when sufficient approved soil materials are not available from excavations.

B. Satisfactory Soil Materials: ASTM D 2487 soil classification groups GW, GP, GM, SW, SP, and SM; free of rock or gravel larger than 2 inches in any dimension, debris, waste, frozen materials, vegetation and other deleterious matter.

C. Unsatisfactory Soil Materials: ASTM D 2487 soil classification groups GC, SC, ML, MH, CL, CH, OL, OH, and PT, or a combination of these groups.

D. Backfill and Fill Materials: Satisfactory soil materials.

E. Select Fill/Subbase Material: Select fill shall be crushed stone or gravel aggregate meeting the TxDOT 2014 Standard Specification for Construction and Maintenance of Highways, Streets, and Bridges, Item 247, Flexible Base, Type A, Type B, or Type C, Grades 1 through 5.

F. Base Course Aggregate: The flexible base course shall be crushed limestone conforming to 2014 Texas Department of Transportation Standard Specifications, Item 247, Type A, Grade 1 or 2, and shall have no more than 15 percent of the material passing the No. 200 sieve.

EXCAVATION AND FILL 31 2300 5-13

G. Engineered Fill: Select Fill / Subbase or base materials.

H. Sand Bedding and Backfill Material: Naturally or artificially graded mixture of natural or crushed sand, with 100 percent passing a No. 16 sieve and not more than 8 percent passing a No. 200 sieve.

I. Gravel Bedding and Backfill Material: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; ASTM D 2940; except with 100 percent passing a 1-inch sieve and not more than 8 percent passing a No. 200 sieve.

J. Drainage Fill: Narrowly graded mixture of crushed stone, or crushed gravel; ASTM D 448; coarse-aggregate grading Size 57; with 100 percent passing a 1-1/2-inch sieve and 0 to 5 percent passing a No. 8 sieve.

K. Filtering Material: Narrowly graded mixture of natural or crushed gravel, or crushed stone and natural sand;

ASTM D 448; coarse-aggregate grading Size 67; with 100 percent passing a 1-inch sieve and 0 to 5 percent passing a No. 4 sieve.

L. Impervious Fill: Clayey gravel and sand mixture capable of compacting to a dense state.

M. Topsoil: Topsoil shall be free of roots, rocks larger than ½ inch, clay lumps, debris, large weeds and foreign matter. On-site topsoil may be stripped, stockpiled and re-used when shown on the Drawings and approved by the Architect/Engineer. Imported topsoil shall be friable loam or sandy loam, with an acidity range (pH) of 5.5 to 7.5, containing minimum of 5 percent and maximum of 25 percent inorganic matter.

2.02 ACCESSORIES

A. Warning Tape: Acid- and alkali-resistant polyethylene film warning tape manufactured for marking and identifying underground utilities, 6 inches wide and 4 mils thick, continuously inscribed with a description of the utility.

B. Detectable Warning Tape: Acid- and alkali-resistant polyethylene film warning tape manufactured for marking and identifying underground utilities, a minimum of 6 inches wide and 4 mils thick, continuously inscribed with a description of the utility, with metallic core encased in a protective jacket for corrosion protection, detectable by metal detector when tape is buried up to 30 inches deep; colored as follows:

C. Tape Colors: Provide tape colors to utilities as follows:

1. Red: Electric.

2. Yellow: Gas, oil, steam, and dangerous materials.

3. Orange: Telephone and other communications.

4. Blue: Water systems.

D. Filter Fabric: Manufacturer's standard nonwoven pervious geotextile fabric of polypropylene, nylon or polyester fibers, or a combination. Provide geotextile fabric as provided by:

1. Alkzo Nobel Geosynthetic Co.

2. Huesker, Inc.

3. TC Mirafi.

4. Tenax Corp.

5. Tensar Earth Technologies, Inc.

6. Or equal.

E. Provide filter fabrics that meet or exceed the listed minimum physical properties determined according to ASTM D 4759 and the referenced standard test method in parentheses:

1. Grab Tensile Strength (ASTM D 4632): 90 lb.

EXCAVATION AND FILL 31 2300 6-13

2. Apparent Opening Size (ASTM D 4751): #70 - 80 U.S. Standard sieve.

3. Permeability (ASTM D 4491): 120 gallons per minute per sq. ft.

PART 3 - EXECUTION

3.01 PREPARATION

A. Call Local Utility Line Information service not less than ten working days before performing Work.

1. Request underground utilities to be located and marked within and surrounding construction areas.

Contact and coordinate with site owner representative for types and locations of on-site utilities.

2. Local Utility Locator contact numbers include:

a. Recycled Water: Cibolo Creek Municipal Authority.

b. Water and Sewer: City Schertz.

c. Texas State Wide One Call Locator, 1-800-545-6005.

d. Gas and Electric: City Public Service, 1-800-545-6005.

e. Telephone Service: AT&T, 1-800-545-6005.

f. Cable Service: Spectrum Cable, 1-800-545-6005.

B. Identify required lines, levels, contours, and datum.

C. Notify utility company and coordinate any utilities to remove or relocate for execution of the Work.

D. Protect utilities indicated to remain from damage.

E. Protect plant life, lawns, and other features remaining as portion of final landscaping. Tree protection is further specified in the Section 31 1000 - Site Clearing.

F. Protect benchmarks, survey control points, existing structures, fences, sidewalks, paving, and curbs from excavating equipment and vehicular traffic.

G. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by earthwork operations.

H. Protect subgrades and foundation soils against freezing temperatures or frost. Provide protective insulating materials as necessary.

I. Underpin adjacent structures which may be damaged by excavation work.

J. Provide erosion control measures to prevent erosion or displacement of soils and discharge of soil-bearing water runoff or airborne dust to adjacent properties and walkways.

3.02 DEWATERING SYSTEM DESCRIPTION

A. Provide dewatering and surface water control systems to permit Work to be completed on dry and stable subgrade.

1. Install well points or wells to dewater and relieve hydrostatic pressure within strata identified as saturated or subject to seasonally high groundwater elevations in the subsurface investigation report.

B. Provide monitoring wells and monitoring equipment to obtain meaningful observations of conditions affecting excavation, adjacent structures, and any adjacent water wells.

1. Furnish standby equipment stored at Project site and ready for immediate use upon failure of dewatering equipment.

EXCAVATION AND FILL 31 2300 7-13

C. Remove and disposal of all dewatering equipment, wells, monitoring wells, piezometers and other system components upon completion of area backfilling. Any dewatering system components allowed to be abandoned-in-place by the Owner shall be properly abandoned in accordance with TCEQ well abandonment requirements, and recorded on the Record As-Built Drawings.

3.03 DEWATERING PERFORMANCE REQUIREMENTS

A. Design dewatering systems to:

1. Lower water table within areas of excavation to a minimum of 1 foot below bottom of excavation, or as otherwise required to permit Work to be completed on dry and stable subgrade.

2. Relieve hydrostatic pressures in confined water bearing strata below excavation to eliminate risk of uplift or other instability of excavation.

3. Prevent damage to adjacent properties, buildings, structures, utilities, and facilities from construction operations.

4. Prevent loss of fines, quick condition, or softening of foundation subgrade.

5. Maintain stability of sides and bottoms of excavations and trenches, face, walls, and bottoms of tunnels, sides and bottoms of shafts.

B. Design surface water control systems to:

1. Collect and remove surface water and seepage entering excavation.

C. Prevent surface water and subsurface or ground water from entering excavations, from ponding on prepared subgrades, and from flooding Project site and surrounding area.

D. Protect subgrades and foundation soils from softening and damage by rain or water accumulation.

3.04 EXCAVATION

A. Explosives: Do not use explosives.

B. Unclassified Excavation: All excavation is unclassified and includes excavation to required subgrade elevations regardless of the character of materials and obstructions encountered.

3.05 STABILITY OF EXCAVATIONS

A. Comply with local codes, ordinances, and requirements of authorities having jurisdiction to maintain stable excavations.

3.06 EXCAVATION FOR STRUCTURES

A. Excavate to indicated elevations and dimensions within a tolerance of plus or minus 0.10 foot. Extend excavations a sufficient distance from structures for placing and removing concrete formwork, installing services and other construction, and for inspections.

B. Excavations for Footings and Foundations: Do not disturb bottom of excavation. Excavate by hand to final grade just before placing concrete reinforcement. Trim bottoms to required lines and grades to leave solid base to receive other work.

C. Excavation for Underground Tanks, Basins, and Mechanical or Electrical Appurtenances: Excavate to elevations and dimensions indicated within a tolerance of plus or minus 0.10 foot. Do not disturb bottom of excavations intended for bearing surface.

3.07 EXCAVATION FOR WALKS AND PAVEMENTS

A. Excavate surfaces under walks and pavements to indicated lines, cross sections, elevations, and grades.

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3.08 EXCAVATION FOR UTILITY TRENCHES

A. Excavate trenches to indicated slopes, lines, depths, and invert elevations.

B. Excavate trenches to uniform widths to provide a working clearance on each side of pipe or conduit. Excavate trench walls vertically from trench bottom to 12 inches higher than top of pipe or conduit, unless otherwise indicated.

C. Clearance: 4 inch to 15 inch diameter pipe; 4 inches minimum and 8 inches maximum each side of pipe or conduit.

D. Clearance: Larger than 15 inch diameter pipe; 8 inches minimum and 15 inches maximum each side pipe or conduit.

E. Trench Bottoms: Where bedding is not required, excavate and shape trench bottoms to provide uniform bearing and support of pipes and conduit. Shape subgrade to provide continuous support for bells, joints, and barrels of pipes and for joints, fittings, and bodies of conduits. Remove projecting stones and sharp objects along trench subgrade.

F. Trench Bottoms: Where bedding is required, excavate trenches deeper than bottom of pipe elevation to allow for bedding course thickness. Hand excavate for bell of pipe.

G. Excavate trenches 6 inches deeper than elevation required in rock or other unyielding bearing material to allow for bedding course.

H. Provide trench protection in accordance with Section 31 20 10 – Trench Excavation Protection, and OSHA requirements.

3.09 APPROVAL OF SUBGRADE

A. Subgrade preparation shall extend at least three (3) feet beyond the limits of the pavements and all adjacent sidewalks, canopies, and other improvements.

B. After site stripping and excavating to the recommended depths, the exposed subgrade in the pavement areas shall be proof-rolled with appropriate construction equipment weighing at least fifteen (15) tons to check the subgrade for weak or soft areas prior to fill/base placement and compaction. This operation shall be observed and evaluated by qualified geotechnical personnel experienced in earthwork operations.

C. Weak / soft spots shall be excavated and replaced with stable compactable select fill material in accordance with geotechnical recommendations.

D. Wet subgrades shall be scarified and/or opened up to a minimum depth of eight (8) inches, allowed to dry, and re-compacted to meet standard compaction specifications.

E. Dry subgrades shall be scarified, moisture conditioned, and re-compacted to meet standard compaction specifications.

F. All subgrades shall be tested for density and moisture content prior to placement of base or subbase material.

G. Fill unauthorized excavation under foundations or wall footings by extending indicated bottom elevation of concrete foundation or footing to excavation bottom, without altering required top elevation. Lean concrete fill may be used to bring elevations to proper position when acceptable to the Architect/Engineer.

H. Fill unauthorized excavations under other construction as directed by the Architect/Engineer.

I. Where indicated widths of utility trenches are exceeded, provide stronger pipe, or special installation procedures, as required by the Architect/Engineer.

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3.10 UNAUTHORIZED EXCAVATION

A. Fill unauthorized excavation under foundations or wall footings by extending indicated bottom elevation of concrete foundation or footing to excavation bottom, without altering required top elevation. Lean concrete fill may be used to bring elevations to proper position when acceptable to the Architect/Engineer.

B. Fill unauthorized excavations under other construction as directed by the Architect/Engineer.

C. Where indicated widths of utility trenches are exceeded, provide stronger pipe, or special installation procedures, as required by the Architect/Engineer.

3.11 STORAGE OF SOIL MATERIALS

A. Stockpile excavated materials acceptable for backfill and fill soil materials, including acceptable borrow materials.

Stockpile soil materials without intermixing. Place, grade, and shape stockpiles to drain surface water. Cover to prevent wind-blown dust.

B. Stockpile soil materials away from edge of excavations. Do not store within drip line of remaining trees.

C. Stockpile stripped topsoil to be re-used separately from other stored materials to prevent inter-mixing with other materials.

3.12 BACKFILL

A. Backfill excavations promptly, but not before completing the following:

1. Acceptance of construction below finish grade including, where applicable, sub-drainage, damp-proofing, waterproofing, and perimeter insulation.

2. Surveying locations of underground utilities for record documents.

3. Testing, inspecting, and approval of underground utilities.

4. Concrete formwork removal.

5. Removal of trash and debris from excavation.

6. Removal of temporary shoring and bracing, and sheeting.

7. Installing permanent or temporary horizontal bracing on horizontally supported walls.

3.13 UTILITY TRENCH BACKFILL

A. Water, Sanitary Sewer, and Gas Piping: Unless otherwise noted on the Drawings, provide 6 inches minimum gravel bedding course under pipe or conduit and extend up the sides of the pipe sufficient to embed the lower quadrant of the pipe. Shape bedding course to provide continuous support for bells, joints, and barrels of pipes and for joints, fittings, and bodies of conduits. Place and compact initial backfill of gravel to a height of 6" over the utility pipe or conduit. Place and compact final backfill of satisfactory soil material to final subgrade.

B. Storm Sewer Piping: Unless otherwise noted on the drawings, provide 6 inches minimum gravel bedding course under pipe or conduit and extend up the sides of the pipe sufficient to embed the lower quadrant of the pipe.

Shape bedding course to provide continuous support for bells, joints, and barrels of pipes and for joints, fittings, and bodies of conduits. Carefully compact material under pipe haunches and bring backfill evenly up on both sides and along the full length of utility piping or conduit to avoid damage or displacement of utility system. Place and compact initial backfill of gravel to a height of 6" over the utility pipe or conduit. Place and compact final backfill of satisfactory soil material to final subgrade.

C. Reinforced Concrete Pipe (RCP) Storm Sewer/Culvert Piping: In satisfactory soil conditions, Contractor may elect not to provide bedding material. If bedding material is not used, Contractor shall shape trench bottom so that approximately 0.5 of the pipe outside diameter will bear on trench bottom. Shape trench bottom to provide continuous support for bells, joints, and barrels of pipes. Carefully compact material under pipe haunches and

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bring backfill evenly up on both sides and along the full length of piping to avoid damage or displacement of system. Place and compact initial backfill of gravel to a height of 6 inches over the utility or conduit. Place and compact final backfill of satisfactory soil material or gravel backfill material to final subgrade.

D. Concrete backfill trenches that carry below or pass under footings and that are excavated within 18 inches of footings. Place concrete to level of bottom of footings.

E. Provide 4 inch-thick concrete base slab support for piping or conduit less than 1'-6" below surface of roadways.

After installation and testing, completely encase piping or conduit in a minimum of 6 inches of concrete before backfilling or placing roadway subbase.

F. Carefully compact material under pipe haunches and bring backfill evenly up on both sides and along the full length of utility piping or conduit to avoid damage or displacement of utility system.

G. Coordinate backfilling with utilities testing.

H. Fill voids with approved backfill materials as shoring and bracing, and sheeting is removed.

I. Place and compact final backfill of satisfactory soil material to final subgrade.

J. Install warning tape directly above utilities, 12 inches below finished grade, except 6 inches below subgrade under pavements and slabs.

3.14 FILL

A. Preparation: Remove vegetation, topsoil, debris, wet, and unsatisfactory soil materials, obstructions, and deleterious materials from ground surface prior to placing fills.

B. Plow strip, or break up sloped surfaces steeper than one vertical to four horizontal (1:4) so fill material will bond with existing surface.

C. When subgrade or existing ground surface to receive fill has a density less than that required for fill, break up ground surface to depth required, pulverize, moisture-condition or aerate soil and re-compact to required density.

D. Place fill material in layers to required elevations for each location listed below.

E. Under grass, use satisfactory excavated or borrow soil material.

F. Under walks and pavements, use select fill/subbase or base material, or satisfactory excavated or borrow soil material.

G. Under steps and ramps, use select fill/subbase or engineered fill material.

H. Under building slabs, use engineered fill material.

I. Under footings and foundations, use engineered fill.

3.15 MOISTURE CONTROL

A. Uniformly moisten or aerate subgrade and each subsequent fill or backfill layer before compaction between optimum moisture content and plus four (+4) percent above optimum moisture content and maintain this moisture content until the fill is covered.

B. Do not place backfill or fill material on surfaces that are muddy, frozen, or contain frost or ice.

C. Remove and replace, or scarify and air-dry satisfactory soil material that is too wet to compact to specified density.

D. Stockpile or spread and dry removed wet satisfactory soil material.

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3.16 COMPACTION

A. Place backfill and fill materials in layers not more than 8 inches in loose depth for material compacted by heavy compaction equipment, and not more than 4 inches in loose depth for material compacted by hand-operated tampers.

B. Place backfill and fill materials evenly on all sides of structures to required elevations. Place backfill and fill uniformly along the full length of each structure.

C. Percentage of Maximum Dry Density Requirements: Compact soil to not less than the following percentages of maximum dry density according to TxDOT Tex-114-E or ASTM D698:

1. Under structures, steps, and pavements, compact the top 6 inches below subgrade and each layer of backfill or fill material at a minimum of 95 percent maximum dry density.

2. Under walkways, compact the top 6 inches below subgrade and each layer of backfill or fill material at a minimum of 92 percent maximum dry density.

3. Under lawn or unpaved areas, compact the top 6 inches below subgrade and each layer of backfill or fill material at a minimum of 90 percent maximum dry density.

4. For utility trenches, compact each layer of initial and final backfill soil material at 95 percent maximum dry density.

3.17 GRADING

A. General: Uniformly grade areas to a smooth surface, free from irregular surface changes. Comply with compaction requirements and grade to cross sections, lines, and elevations indicated.

B. Provide a smooth transition between existing adjacent grades and new grades.

C. Cut out soft spots, fill low spots, and trim high spots to conform to required surface tolerances.

D. Site Grading: Slope grades to direct water away from buildings and to prevent ponding. Finish subgrades to required elevations within the following tolerances:

1. Lawn or Unpaved Areas: Plus or minus 1 inch.

2. Walks: Plus or minus 1 inch.

3. Pavements: Plus or minus ½ inch.

4. Grading Inside Building Lines: Finish subgrade to a tolerance of 1/2 inch when tested with a 10-foot straightedge.

3.18 SUBSURFACE DRAINAGE

A. Sub-drainage Pipe: Specified in Section 33 4600 - "Subdrainage."

B. Subsurface Drain: Place subsurface drainage geotextile around perimeter of sub-drainage trench. Place a 6-inch course of filter material on subsurface drainage geotextile to support sub-drainage pipe. Encase sub-drainage pipe in a minimum of 12 inches of filter material, placed in compacted layers 6 inches thick, and wrap in subsurface drainage geotextile, overlapping sides and ends at least 6 inches.

C. Compact each filter material layer to 90 percent of maximum dry unit weight.

D. Drainage Backfill: Place and compact filter material over subsurface drain, in width indicated, to within 12 inches of final subgrade, in compacted layers 6 inches thick. Overlay drainage backfill with 1 layer of subsurface drainage geotextile, overlapping sides and ends at least 6 inches.

E. Compact each filter material layer to 90 percent of maximum dry unit weight.

F. Place and compact impervious fill over drainage backfill in 6-inch thick compacted layers to final subgrade.

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3.19 SELECT FILL/SUBBASE AND BASE COURSES

A. Under pavements and walks (if applicable), place select fill/subbase course material on prepared subgrades.

Place base course material over subgrades or subbases to pavements.

B. Compact select fill/subbase and base courses in the range of two (-2) percent below and three (+3) percent above optimum moisture content to required grades, lines, cross sections and thickness to not less than 95 percent of maximum density as determined by TxDOT Tex-113-E or ASTM D1557.

C. Compact asphalt treated base to a minimum of 95% of maximum density as determined by TxDOT Tex-126-E.

D. Shape select fill/subbase and base to required crown elevations and cross- slope grades.

E. When thickness of compacted select fill/subbase or base course is 6 inches or less, place materials in a single layer.

F. When thickness of compacted select fill/subbase or base course exceeds 6 inches, place materials in equal layers, with no layer more than 6 inches thick or less than 3 inches thick when compacted.

G. Pavement Shoulders: Place shoulders along edges of select fill/subbase and base course to prevent lateral movement. Construct shoulders at least 12 inches wide of acceptable soil materials and compact simultaneously with each select fill/subbase and base layer.

3.20 DRAINAGE COURSE

A. Place drainage course on subgrades free of mud, frost, snow, or ice.

B. On prepared subgrade, place and compact drainage course under cast-in-place concrete slabs-on-grade as follows:

1. Install sub-drainage geotextile on prepared subgrade according to manufacturer's written instructions, overlapping sides and ends.

2. Place drainage course 6 inches or less in compacted thickness in a single layer.

3. Place drainage course that exceeds 6 inches in compacted thickness in layers of equal thickness, with no compacted layer more than 6 inches thick or less than 3 inches thick.

4. Compact each layer of drainage course to required cross sections and thicknesses to not less than 95 percent of maximum dry unit weight.

3.21 FIELD QUALITY CONTROL

A. Testing Agency Services: Allow testing agency to inspect and test each subgrade, each fill or backfill layer, and each course of base layers. Do not proceed until test results for previously completed work verify compliance with requirements.

B. Perform field in-place density tests according to test methods identified for each material.

C. Field in-place density tests may also be performed by the nuclear method according to ASTM D 6938, provided that calibration curves are periodically checked and adjusted to correlate to tests performed using TxDOT Tex- 113-E/Tex-114-E or ASTM D 698/1557.

D. When field in-place density tests are performed using nuclear methods, make calibration checks of both density and moisture gages at beginning of work, on each different type of material encountered, and at intervals as directed by the Architect/Engineer.

E. Footing Subgrade: At footing subgrades, perform at least one test of each soil stratum to verify design bearing capacities. Subsequent verification and approval of other footing subgrades may be based on a visual comparison of each subgrade with related tested strata when acceptable to the Architect/Engineer.

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F. Paved Areas: At subgrade and at each compacted fill, backfill, and base layer, perform at least one field in-place density test for every 2,000 sq. ft. of building area and 5,000 sq. ft. or less of paved area, but in no case fewer than three tests.

G. Foundation Wall Backfill: In each compacted backfill layer, perform at least one field in-place density test for each 100 feet or less of wall length, but no fewer than two tests along a wall face.

H. Trench Backfill: In each compacted initial and final backfill layer, perform at least one field in-place density test for each 150 feet or less of trench, but no fewer than two tests.

I. When testing agency reports that subgrades, fills, or backfills are below specified density, scarify and moisten or aerate, or remove and replace soil to the depth required, re-compact and retest until required density is obtained.

3.22 PROTECTION

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

B. Repair and re-establish grades to specified tolerances where…