SECTION 32 11 23 AGGREGATE BASE COURSES -...

PART1 GENERAL

1.1 SECTION INCLUDES

A. Aggregate base course.

B. Paving aggregates.

SECTION 32 11 23

AGGREGATE BASE COURSES

1.2 RELATED REQUIREMENTS

A. Section 31 23 16.13 - Trenching: Compacted fill over utility trenches under base course.

B. Section 31 23 23 - Fill: Topsoil fill at areas adjacent to aggregate base course.

C. Section 31 23 23 - Fill: Compacted fill under base course.

D. Section 32 12 16 - Asphalt Paving: Finish and binder asphalt courses.

E. Section 32 13 13 - Concrete Paving: Finish concrete surface course.

F. Section 32 17 13 - Parking Bumpers: Timber bumpers.

1.3 REFERENCE STANDARDS

A. AASHTO M 147 - Standard Specification for Materials for Aggregate and Soil-Aggregate Subbase, Base and Surface Courses; 1965 (2004 ).

B. AASHTO T 180 - Standard Specification for Moisture-Density Relations of Soils Using a 4.54 kg (10-lb) Rammer and a 457 mm (18 in.) Drop; 2010.

C. ASTM C136/C136M - Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates; 2014.

D. ASTM D698 - Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 ft-lbf/ft3 (600 kN-m/m3)); 2012.

E. ASTM D1556 - Standard Test Method for Density and Unit Weight of Soil in Place by the SandCone Method; 2007.

F. ASTM D2167 - Standard Test Method for Density and Unit Weight of Soil in Place by the Rubber Balloon Method; 2008.

G. ASTM D2487 - Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); 2011.

H. ASTM D4318 - Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils; 2010.

100051538 122081 MDC Fish America Building Replacement

32 11 23- 1 AGGREGATE BASE COURSES 100% Construction Specifications

Issued: 04-28-17

I. ASTM D6938 - Standard Test Method for In-Place Density and Water Content of Soil and SoilAggregate by Nuclear Methods (Shallow Depth); 2010.

1.4 SUBMITTALS

A. See Uniform General Conditions and General Supplementary Conditions.

PART 2 PRODUCTS

2.1 MATERIALS

A. Coarse Aggregate Type 1: Coarse aggregate, conforming to State of Texas Highway Department standard.

B. Medium Aggregate Type 1: Natural stone; pea gravel, washed, free of clay, shale, organic matter.

C. Fine Aggregate Type 1: Sand; conforming to State of Texas Highway Department standard.

D. Geotextile Fabric: Non-biodegradable, woven

2.2 SOURCE QUALITY CONTROL


B. Where aggregate materials are specified using ASTM D2487 classification, test and analyze samples for compliance before delivery to site.

PART 3 EXECUTION

3.1

A.

B.

3.2

A.

B.

3.3

A.

B.

C.

EXAMINATION

Verify that survey bench marks and intended elevations for the work are as indicated.

Verify substrate has been inspected, gradients and elevations are correct, and is dry.

PREPARATION

Correct irregularities in substrate gradient and elevation by scarifying, reshaping, and recompacting.

Do not place aggregate on soft, muddy, or frozen surfaces.

INSTALLATION

Spread aggregate over prepared substrate to a total compacted thickness of 9 inches.

Place aggregate in maximum 4 inch layers and roller compact to specified density.

Level and contour surfaces to elevations and gradients indicated.

100051538 32 11 23- 2 AGGREGATE BASE COURSES 100% Construction Specifications

Issued: 04-28-17 122081 MDC Fish America Building Replacement

3.4

3.5

3.6

D. Add small quantities of fine aggregate to coarse aggregate as appropriate to assist compaction.

E. Add water to assist compaction. If excess water is apparent, remove aggregate and aerate to reduce moisture content.

F.

A.

A.

B.

C.

A.

Use mechanical tamping equipment in areas inaccessible to compaction equipment.

TOLERANCES

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

FIELD QUALITY CONTROL

See Uniform General Conditions and General Supplementary Conditions.

Compaction density testing will be performed on compacted aggregate base course in accordance with ASTM D1556, ASTM D2167, or ASTM D6938.

Compaction density test: One test per every 300 cubic yards, minimum 1 per lift.

CLEANING

Remove unused stockpiled materials, leave area in a clean and neat condition. Grade stockpile area to prevent standing surface water.

B. Leave borrow areas in a clean and neat condition. Grade to prevent standing surface water.

END OF SECTION

100051538 32 11 23- 3 AGGREGATE BASE COURSES 100% Construction Specifications


PART1 GENERAL


A. Aggregate base course.


SECTION 32 12 16

ASPHALT PAVING

A. Section 31 22 00 - Grading: Preparation of site for paving and base.

B. Section 31 23 23 - Fill: Compacted subgrade for paving.

C. Section 32 13 13 - Concrete Paving: Concrete substrate.

D. Section 32 17 13 - Parking Bumpers: Concrete bumpers.

E. Section 32 17 23.13 - Painted Pavement Markings: Concrete bumpers.


A. Texas Department of Transportation (TxDOT) - Standard Specifications for construction of Highways, Streets and Bridges.

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

1.4 QUALITY ASSURANCE

A. Perform Work in accordance with TxDOT standard.

B. Mixing Plant: Conform to TxDOT standard.

C. Obtain materials from same source throughout.

PART 2 PRODUCTS

2.1 MATERIALS

A. Aggregate for Base Course: In accordance with TxDOT standards.

2.2 ASPHALT PAVING MIXES AND MIX DESIGN

A. Base Course: 3.0 to 6 percent of asphalt cement by weight in mixture in accordance with TxDOT Item 340 Type D


32 12 16- 1 ASPHALT PAVING 100% Construction Specifications

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PART 3 EXECUTION

3.1 BASE COURSE

A. Place and compact base course.

3.2 PLACING ASPHALT PAVEMENT

A. Install Work in accordance with TxDOT standards.

B. Place asphalt within 24 hours of applying primer or tack coat.

C. Compact pavement by rolling to specified density. Do not displace or extrude pavement from position. Hand compact in areas inaccessible to rolling equipment.

D. Perform rolling with consecutive passes to achieve even and smooth finish without roller marks.


END OF SECTION

32 12 16- 2 ASPHALT PAVING 100% Construction Specifications

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PART1 GENERAL


SECTION 32 13 13

CONCRETE PAVING

A. Concrete sidewalks and parking areas.


A. Section 03 30 00 - Cast-in-Place Concrete.

B. Section 07 92 00 - Joint Sealants: Sealing joints.

C. Section 31 22 00 - Grading: Preparation of site for paving and base and preparation of subsoil at pavement perimeter for planting.

D. Section 31 23 23 - Fill: Compacted subbase for paving.

E. Section 32 12 16 - Asphalt Paving: Asphalt wearing course.

F. Section 32 17 13 - Parking Bumpers: Precast concrete parking bumpers.

G. HVJ Report No. AG 16 10115 Geotech Report


A. ACI 211.1 - Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete; 1991 (Reapproved 2009).

B. ACI 301 - Specifications for Structural Concrete; 2010 (Errata 2012).

C. ACI 304R - Guide for Measuring, Mixing, Transporting, and Placing Concrete; 2000.

D. ACI 305R - Hot Weather Concreting; 2010.

E. ACI 306R - Cold Weather Concreting; 2010.

F. ASTM C33/C33M - Standard Specification for Concrete Aggregates; 2016.

G. ASTM C39/C39M - Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens; 2015a.

H. ASTM C94/C94M - Standard Specification for Ready-Mixed Concrete; 2015.

I. ASTM C309 - Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete; 2011.


32 13 13- 1 CONCRETE PAVING 100% Construction Specifications

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J. ASTM C685/C685M - Standard Specification for Concrete Made by Volumetric Batching and Continuous Mixing; 2014.

1.4 SUBMITTALS


B. Design Data: Indicate pavement thickness, designed concrete strength, reinforcement, and typical details.

C. Shop Drawings.

PART 2 PRODUCTS

2.1 PAVING ASSEMBLIES

A. Comply with applicable requirements of ACI 301.

B. Design paving for parking.

C. Concrete Sidewalks and Median Barrier: 3,000 psi 28 day concrete, 4 inches thick, buff color Portland cement, exposed aggregate finish.

D. Parking Area Pavement: 4,000 psi 28 day concrete, 6 inches thick, 6 by 6 - W2.9 by W2.9 mesh reinforcement, wood float finish. Mesh shall be supported above subgrade.

2.2 FORM MATERIALS

A. Form Materials: Conform to ACI 301.

2.3 REINFORCEMENT

A. Reinforcing Steel and Welded Wire Reinforcement: Types specified in Section 03 20 00.

2.4 CONCRETE MATERIALS

A. Obtain cementitious materials from same source throughout.

B. Concrete Materials: As specified in Section 03 30 00.

2.5 ACCESSORIES

A. Curing Compound: ASTM C309, Type 1, Class A.

2.6 CONCRETE MIX DESIGN

A. Proportioning Normal Weight Concrete: Comply with ACI 211.1 recommendations.

B. Concrete Strength: Establish required average strength for each type of concrete on the basis of field experience or trial mixtures, as specified in ACI 301.



Issued: 04-28-17

1. For trial mixtures method, employ independent testing agency acceptable to Architect for preparing and reporting proposed mix designs.

2.7 MIXING

A. On Project Site: Mix in drum type batch mixer, complying with ASTM C685/C685M. Mix each batch not less than 1-1/2 minutes and not more than 5 minutes.

B. Transit Mixers: Comply with ASTM C94/C94M.

PART 3 EXECUTION

3.1 EXAMINATION

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

B. Verify gradients and elevations of base are correct.

3.2 SUBBASE

A. See Section 32 11 23 for construction of base course for work of this Section.

3.3 PREPARATION

A. Moisten base to minimize absorption of water from fresh concrete.

B. TPWD Construction Manager minimum 5 days prior to commencement of concreting operations.

3.4 FORMING

A. Place and secure forms to correct location, dimension, profile, and gradient.

3.5 REINFORCEMENT

A. Place reinforcement as indicated.

B. Interrupt reinforcement at contraction joints.

C. Place dowels to achieve pavement and curb alignment as detailed.

3.6 COLD AND HOT WEATHER CONCRETING

A. Follow recommendations of ACI 305R when concreting during hot weather.

B. Follow recommendations of ACI 306R when concreting during cold weather.

C. Do not place concrete when base surface temperature is less than 40 degrees F, or surface is wet or frozen.



Issued: 04-28-17

3.7 PLACING CONCRETE

A. Coordinate installation of snow melting components.

B. Place concrete in accordance with ACI 304R.

C. Place concrete using the slip form technique.

D. Ensure reinforcement, inserts, embedded parts, and formed joints are not disturbed during concrete placement.

E. Apply surface retarder to all exposed surfaces in accordance with manufacturer's instructions.

3.8 JOINTS

A. Align curb, gutter, and sidewalk joints.

3.9 EXPOSED AGGREGATE

A. Wash concrete surfaces to which surface retarder has been applied with clean water, and scrub with stiff bristle brush exposing aggregate to match sample panel.

3.10 FINISHING

A. Sidewalk Paving: Light broom, texture perpendicular to direction of travel with troweled and radiused edge 1/4 inch radius.

3.11 TOLERANCES

A. Maximum Variation From True Position: 1/4 inch.

3.12 FIELD QUALITY CONTROL

A. Contractor shall coordinate with the owners materials testing firm to perform field quality control tests.

a. Provide free access to concrete operations at project site and cooperate with appointed firm.

B. Concrete Compressive Strength Test: 2 Cylinders per 180 cubic yards.

3.13 PROTECTION

A. Immediately after placement, protect pavement from premature drying, excessive hot or cold temperatures, and mechanical injury.


END OF SECTION


Issued: 04-28-17

SECTION 32 17 13

PARKING BUMPERS

PART1 GENERAL


A. Precast concrete parking bumpers and anchorage.


A. ASTM A615/A615M - Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement ; 2015.

B. ASTM C260/C260M - Standard Specification for Air-Entraining Admixtures for Concrete ; 201 Oa.

C. ASTM C330/C330M - Standard Specification for Lightweight Aggregates for Structural Concrete ; 2014.

1.3 SUBMITTALS

A. See Uniform General Conditions and General Supplementary Conditions

PART 2 PRODUCTS

2.1

A.

MATERIALS

Parking Bumpers: Precast concrete, conforming to the following: 1. Cement: ASTM C150/C150M, Portland Type I - Normal; white color. 2. Concrete Materials: ASTM C330/C330M aggregate, water, and sand. 3. Reinforcing Steel: ASTM A615/A615M, deformed steel bars; unfinished, strength and size

commensurate with precast unit design. 4. Air Entrainment Admixture: ASTM C260/C260M. 5.

6.

7. 8.

9.

Concrete Mix: Minimum 5,000 psi compressive strength after 28 days, air entrained to 5 to 7 percent. Use rigid molds, constructed to maintain precast units uniform in shape, size and finish. Maintain consistent quality during manufacture. Embed reinforcing steel, and drill or sleeve for two dowels. Cure units to develop concrete quality, and to minimize appearance blemishes such as nonuniformity, staining, or surface cracking. Minor patching in plant is acceptable, providing appearance of units is not impaired.

PART 3 EXECUTION

3.1 INSTALLATION

A. Install units without damage to shape or finish. Replace or repair damaged units.

B. Install units in alignment with adjacent work.


32 17 13- 1 PARKING BUMPERS 100% Construction Specifications

Issued: 04-28-17

C. Fasten units in place with 2 dowels 1 foot deep per unit.


END OF SECTION

32 17 13- 2 PARKING BUMPERS 100% Construction Specifications

Issued: 04-28-17

PART1 GENERAL


SECTION 32 17 23.13

PAINTED PAVEMENT MARKINGS

A. Parking lot markings, including parking bays, crosswalks, arrows, handicapped symbols, and curb markings.


A. Section 32 13 13 - Concrete Paving.


A. MPI (APL) - Master Painters Institute Approved Products List; Master Painters and Decorators Association ; current edition, www.paintinfo.com.

B. FHWA MUTCD - Manual on Uniform Traffic Control Devices for Streets and Highways; U.S. Department of Transportation, Federal Highway Administration; http://mutcd.fhwa.dot.gov ; current edition.

PART 2 PRODUCTS

2.1 MATERIALS

A. Line and Zone Marking Paint: MPI (APL) No. 97 Latex Traffic Marking Paint; color(s) as indicated. 1. Parking Lots: Yellow. 2. Handicapped Symbols: Blue.

B. Temporary Marking Tape: Preformed, reflective, pressure sensitive adhesive tape in color(s) required; Contractor is responsible for selection of material of sufficient durability as to perform satisfactorily during period for which its use is required.

PART 3 EXECUTION

3.1 PREPARATION

A. Allow new pavement surfaces to cure for a period of not less than 14 days before application of marking materials.

B. Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.

C. Clean surfaces thoroughly prior to installation. 1. Remove dust, dirt, and other granular surface deposits by sweeping, blowing with

compressed air, rinsing with water, or a combination of these methods.


32 17 23- 1 PAINTED PAVEMENT MARKINGS 100% Construction Specifications

Issued: 04-28-17

D. Where oil or grease are present, scrub affected areas with several applications of trisodium phosphate solution or other approved detergent or degreaser, and rinse thoroughly after each application; after cleaning, seal oil-soaked areas with cut shellac to prevent bleeding through the new paint.

E. Establish survey control points to determine locations and dimensions of markings; provide templates to control paint application by type and color at necessary intervals.

F. Temporary Pavement Markings: When required or directed by Architect, apply temporary markings of the color(s), width(s) and length(s) as indicated or directed. 1. After temporary marking has served its purpose, remove temporary marking by carefully

controlled sandblasting, approved grinding equipment, or other approved method so that surface to which the marking was applied will not be damaged.

2. At Contractor's option, temporary marking tape may used in lieu of temporary painted marking; remove unsatisfactory tape and replace with painted markings at no additional cost to Owner.

3.2 INSTALLATION

A. Begin pavement marking as soon as practicable after surface has been cleaned and dried.

B. Do not apply paint if temperature of surface to be painted or the atmosphere is less than 50 degrees For more than 95 degrees F.

C. Apply in accordance with manufacturer's instructions using an experienced technician that is thoroughly familiar with equipment, materials, and marking layouts.

D. Comply with TxDOT TMUTCD for details not shown.

E. Apply markings in locations determined by measurement from survey control points; preserve control points until after markings have been accepted.

F. Apply uniformly painted markings of color(s), lengths, and widths as indicated on the drawings true, sharp edges and ends. 1. Apply paint in one coat only. 2. Wet Film Thickness: 0.015 inch, minimum. 3. Width Tolerance: Plus or minus 1/8 inch.

G. Parking Lots: Apply parking space lines, entrance and exit arrows, painted curbs, and other markings indicated on drawings. 1. Mark the International Handicapped Symbol at indicated parking spaces. 2. Hand application by pneumatic spray is acceptable.

H. Symbols: Use a suitable template that will provide a pavement marking with true, sharp edges and ends, of the design and size indicated.

3.3 DRYING, PROTECTION, AND REPLACEMENT

A. Protect newly painted markings so that paint is not picked up by tires, smeared, or tracked.

B. Provide barricades, warning signs, and flags as necessary to prevent traffic crossing newly painted markings.



Issued: 04-28-17

C. Allow paint to dry at least the minimum time specified by the applicable paint standard and not less than that recommended by the manufacturer.

D. Remove and replace markings that are applied at less than minimum material rates; deviate from true alignment; exceed length and width tolerances; or show light spots, smears, or other deficiencies or irregularities.

E. Remove markings in manner to avoid damage to the surface to which the marking was applied, using carefully controlled sand blasting, approved grinding equipment, or other approved method.

F. Replace removed markings at no additional cost to Owner.


END OF SECTION


Issued: 04-28-17

SECTION 32 23 24

CONTROL OF GROUND WATER

PART1 GENERAL


1.2

1.3

A. Dewatering, depressurizing, draining, and maintaining trenches, shaft excavations, structural excavations, and foundation beds in a stable condition, and controlling ground waterconditions for tunnel excavations.

B. Protection of excavations and trenches from surface runoff.

C.

A.

B.

C.

Disposing of removed ground water by approved methods.

REFERENCES

ASTM D 698 - Test Methods for Moisture-Density Relations of Soils and Soil-Aggregate Mixtures, Using 5.5-1 b (2.49 kg) Rammer and 12-inch (304.8 mm) Drop.

Federal Regulations, 29 CFR Part 1926, Standards-Excavation, Occupational Safety and Health Administration (OSHA).

Federal Register 40 CFR (Vol. 55, No. 222) Part 122, EPA Administered Permit Programs (NPDES), Para.122.26(b)(14) Storm Water Discharge.

DEFINITIONS

A. Ground water control includes both dewatering and depressurization of water-bearing soil layers.

1. Dewatering includes lowering the water table and intercepting seepage which would otherwise emerge from slopes or bottoms of excavations, or into tunnels and shafts, and disposing of removed ground water by approved methods. The intent of dewatering is to increase the stability of tunnel excavations and excavated slopes; prevent dislocation of material from slopes or bottoms of excavations; reduce lateral loads on sheeting and bracing; improve excavating and hauling characteristics of excavated material; prevent failure or heaving of the bottom of excavations; and to provide suitable conditions for placement of backfill materials and construction of structures, piping and other installations.

2. Depressurization includes reduction in piezometric pressure within strata not controlled by dewatering alone, as required to prevent failure or heaving of excavation bottom or instability of tunnel excavations.

1.4 PERFORMANCE REQUIREMENTS

A. Conduct subsurface investigations as needed to identify ground water conditions and to provide parameters for design, installation, and operation of ground water control systems.

B. Design a ground water control system, compatible with requirements of Federal Regulations 29 CFR Part 1926, to produce the following results:

1. Effectively reduce the hydrostatic pressure affecting:


32 23 24- 1 CONTROL OF GROUND WATER 100% Construction Specifications

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a) Excavations (including utility trenches); b) Tunnel excavation, face stability or seepage into tunnels.

2. Develop a substantially dry and stable subgrade for subsequent construction operations.

3. Preclude damage to adjacent properties, buildings, structures, utilities, installed facilities, and other work.

4. Prevent the loss of fines, seepage, boils, quick condition, or softening of the foundation strata.

5. Maintain stability of sides and bottom of excavations.

C. Provide ground water control systems which may include single-stage or multiple-stage well point systems, eductor and ejector-type systems, deep wells, or combinations of these equipment types.

D. Provide drainage of seepage water and surface water, as well as water from any other source entering the excavation. Excavation drainage may include placement of drainage materials, such as crushed stone and filter fabric, together with sump pumping.

E. Provide ditches, berms, pumps and other methods necessary to divert and drain surface water away from excavations.

F. Locate ground water control and drainage systems so as not to interfere with utilities, construction operations, adjacent properties, or adjacent water wells.

G. Assume sole responsibility for ground water control systems and for any loss or damage resulting from partial or complete failure of protective measures, and any settlement or resultant damage caused by the ground water control operations. Modify ground water control systems or operations if they cause or threaten to cause damage to new construction, existing site improvements, adjacent property, or adjacent water wells, or affect potentially contaminated areas. Repair damage caused by ground water control systems or resulting from failure of the system to protect property as required.

H. Provide an adequate number of piezometers installed at the proper locations and depths as required to provide meaningful observations of the conditions affecting the excavation, adjacent structures, and water wells.

I. Provide environmental monitoring wells installed at the proper locations and depths as required to provide adequate observations of hydrostatic conditions and possible contaminant transport from contamination sources into the work area or into the ground water control system.

J. Decommission piezometers and monitoring wells installed during design phase studies and left for Contractors monitoring and use, if applicable.

1.5 ENVIRONMENTAL REQUIREMENTS

A. Comply with requirements of agencies having jurisdiction.



Issued: 04-28-17

B. Comply with Texas Commission on Environmental Quality (TCEQ) regulations and Texas Water Well Drillers Association for development, drilling, and abandonment of wells used in dewatering system.

C. Prior to beginning construction activities, file Notice of Intent (NOi) for Storm Water Discharges Associated with Construction Activity under the Texas Pollutant Elimination System (TPDES) General Permit No. TXR150000, administered by the Texas Commission on Environmental Quality (TCEQ). The general permit falls under the provisions of Section 402 of the Clean Water Act and Chapter 26 of the Texas Water Code.

D. Prepare submittal form and submit to TCEQ along with application fee.

E. Upon completion of construction, file Notice of Termination (NOT) for Storm Water Discharges Associated with Construction Activity under the TPDES General Permit with the TCEQ.

F. Obtain all necessary permits from agencies with control over the use of ground water and matters affecting well installation, water discharge, and use of existing storm drains and natural water sources. Because the review and permitting process may be lengthy, take early action to pursue and submit for the required approvals.

G. Monitor ground water discharge for contamination while performing pumping in the vicinity of potentially contaminated sites.

H. Conduct sampling and testing of ground water and receiving waters as outlined in Article 3 below.

PART 2 PRODUCTS

2.1 EQUIPMENT AND MATERIALS

A. Equipment and materials are at the option of Contractor as necessary to achieve desired results for dewatering.

B. Eductors, well points, or deep wells, where used, shall be furnished, installed and operated by an experienced contractor regularly engaged in ground water control system design, installation, and operation.

C. All equipment must be in good repair and operating order.

D. Sufficient standby equipment and materials shall be kept available to ensure continuous operation, where required.

PART 3 EXECUTION

3.1 GROUND WATER CONTROL

A. Perform a subsurface investigation by borings as necessary to identify water bearing layers, piezometric pressures, and soil parameters for design and installation of ground water control systems. Perform pump tests, if necessary to determine the drawdown characteristics of the water bearing layers.



Issued: 04-28-17

B. Provide labor, material, equipment, techniques and methods to lower, control and handle ground water in a manner compatible with construction methods and site conditions. Monitor effectiveness of the installed system and its effect on adjacent property.

C. Install, operate, and maintain ground water control systems in accordance with the ground water control system design. Notify the Owner/Engineer in writing of any changes made to accommodate field conditions and changes to the Work. Revise the ground water control system design to reflect field changes.

D. Provide for continuous system operation, including nights, weekends, and holidays. Arrange for appropriate backup if electrical power is primary energy source for dewatering system.

E. Monitor operations to verify that the system lowers ground water piezometric levels at a rate required to maintain a dry excavation resulting in a stable subgrade for prosecution of subsequent operations.

F. Where hydrostatic pressures in confined water bearing layers exist below excavation, depressurize those zones to eliminate risk of uplift or other instability of excavation or installed works. Allowable piezornetric elevations shall be defined in the ground water control system design.

G. Remove ground water control installations.

1. Remove pumping system components and piping when ground water control is no longer required.

2. Remove piezometers and monitoring wells when directed by the Engineer.

3. Grout abandoned well and piezometer holes. Fill piping that is not removed with cementbentonite grout or cement-sand grout.

H. During backfilling, dewatering may be reduced to maintain water level a minimum of 5 feet below prevailing level of backfill. However, do not allow that water level to result in uplift pressures in excess of 80 percent of downward pressure produced by weight of structure or backfill in place. Do not allow water levels to rise into cement stabilized sand until at least 48 hour after placement.

I. Provide a uniform diameter for each pipe drain run constructed for dewatering. Remove pipe drain when it has served its purpose. If removal of pipe is impractical, provide grout connections at 50-foot intervals and fill pipe with cement-bentonite grout or cement-sand grout when pipe is removed from service.

J. Extent of construction ground water control for structures with a permanent perforated underground drainage system may be reduced, such as for units designed to withstand hydrostatic uplift pressure. Provide a means for draining the affected portion of underground system, including standby equipment. Maintain drainage system during operations and remove it when no longer required.

K. Remove system upon completion of construction or when dewatering and control of surface or ground water is no longer required.

L. In unpaved areas, compact backfill to not less than 95 percent of Standard Proctor maximum dry density in accordance with ASTM D 698. In paved areas (or areas to receive paving), compact



Issued: 04-28-17

backfill to not less than 98 percent of Standard Proctor maximum dry density in accordance with ASTM D 698.

3.2 REQUIREMENTS FOR EDUCTOR, WELL POINTS, OR DEEP WELLS

A. For above ground piping in ground water control system, include a 12-inch minimum length of clear, transparent piping between every eductor well or well point and discharge header so that discharge from each installation can be visually monitored.

B. Install sufficient piezometers or monitoring wells to show that all trench or shaft excavations in water bearing materials are pre-drained prior to excavation. Provide separate piezometers for monitoring of dewatering and for monitoring of depressurization. Install piezometers and monitoring wells for tunneling as appropriate for Contractor's selected method of work.

C. Install piezometers or monitoring wells not less than one week in advance of beginning the associated excavation (including trenching).

D. Dewatering may be omitted for portions of underdrains or other excavations, but only where auger borings and piezometers or monitoring wells show that soil is pre-drained by an existing system such that the criteria of the ground water control system design are satisfied.

E. Replace installations that produce noticeable amounts of sediments after development.

F. Provide additional ground water control installations, or change the methods, in the event that the installations according to the ground water control system design do not provide satisfactory results based on the performance criteria defined by the ground water control system design and by these specifications.

3.3 EXCAVATION DRAINAGE

A. Contractor may use excavation drainage methods if necessary to achieve well drained conditions. The excavation drainage may consist of a layer of crushed stone and filter fabric, and sump pumping in combination with sufficient wells for ground water control to maintain stable excavation and backfill conditions.

3.4 MAINTENANCE AND OBSERVATION

A. Conduct daily maintenance and observation of piezometers or monitoring wells while the ground water control installations or excavation drainage are operating in an area or seepage into tunnel is occurring. Keep system in good condition.

B. Replace damaged and destroyed piezometers or monitoring wells with new piezometers or wells as necessary to meet observation schedule.



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C. Cut off piezometers or monitoring wells in excavation areas where piping is exposed, only as necessary to perform observation as excavation proceeds. Continue to maintain and make observations, as specified.

D. Remove and grout piezometers inside or outside the excavation area when ground water control operations are complete. Remove and grout monitoring wells when directed by the Engineer.

3.5 MONITORING AND RECORDING

A. Monitor and record average flow rate of operation for each deep well, or for each well point or eductor header used in dewatering system. Also monitor and record water level and ground water recovery. These records shall be obtained daily until steady conditions are achieved, and twice weekly thereafter.

B. Observe and record elevation of water level daily as long as ground water control system is in operation, and weekly thereafter until the Work is completed or piezometers or wells are removed, except when Engineer determines that more frequent monitoring and recording are required. Comply with Construction Inspector's direction for increased monitoring and recording and take measures as necessary to ensure effective dewatering for intended purpose.

3.6 SAMPLING, TESTING AND DISPOSAL OF GROUND WATER

A. It is the intent that the Contractor discharge groundwater primarily into the existing storm water system in accordance with City Ordinance, Article XVI, Section 55-203, orly if the groundwater is uncontaminated and the quality of the ground water is equal to or better than the quality of the receiving stream.

B. The Contractor shall prevent ground water from trench or excavation dewatering operations from discharging directly into the storm water system prior to testing and authorization. Ground water from dewatering operations shall be sampled and tested, and disposed of by approved methods.

C. Laboratory analysis of groundwater and receiving water quality is to be performed by the Contractor at the Contractor's expense, prior to commencing discharge, and groundwater analysis shall be performed by the Contractor at a minimum of once per week. Contractor shall coordinate with the Owner/Engineer on all laboratory analysis. Laboratory analysis of groundwater shall also be performed at each new area of construction prior to discharge from that location.

D. Sample containers, holding times, preservation methods, and analytical methods, shall either follow the requirements in 40 CFR Part 136 (as amended), or the latest edition of "Standard Methods for the Examination of Water and Wastewater." Any laboratory providing analysis must be accredited or certified by the Texas Commission on Environmental Quality according to Title 30 Texas Administrative Code (30 TAC) Chapters 25 for the matrices, methods, and parameters of analysis, if available, or be exempt according to 30 TAC §25.6.

E. Analysis of the ground water discharge shall show it to be equal to or better than the quality of the first natural body of receiving water. This requires testing of both the receiving water and a sample of the ground water. All pans of this procedure shall be complete prior to any discharge of ground water to the storm water system.

F. Steps to Determine Legitimate Discharge:



Issued: 04-28-17

1. Identify the First Receiving Water.

a) When the first body of water is a fresh water system (Nueces River or Oso Creek), the analysis typically fails because the local ground water will likely be too high in Total Dissolved Solids (TDS). In the case of a perched aquifer, the ground water may turn out fairly fresh, but local experience shows this to be unlikely.

b) The receiving water is the inner costal water way.

2. Compare Ground Water Discharge Quality to Receiving Water Quality.

The following table, Ground Water Discharge Limits, indicates that the parameters to compare to the receiving water are Total Dissolved Solids (TDS) and Total Suspended Solids (TSS). If the ground water results are equal to or better than the receiving water, then the discharge may be authorized as long as the discharge does not exceed the other parameters which would indicate hydrocarbon contamination. Note that the receiving water only needs to be tested initially as a baseline and the ground water shall be tested weekly to ensure compliance.

GROUND WATER DISCHARGE LIMITS

Ground Receiving Water Water Monitoring Monitoring Maximum

Parameter Frequency Frequency Limitation

Total Once Prior to Dissolved Initial+ Weekly Discharge < Receiving Water

Total Suspended Once Prior to Solids (TSS) Initial= Weekly Discharge < Receiving Water

Total Petroleum Hydrocarbons Initial + Weekly 15 mg/L Total Lead Initial + Weekly O. lmg/L Benzene Initial+ Weekly 0.005mg/L TotalBTEX Initial + Weekly 0.1 mg/L

Polynuclear Aromatic Hydrocarbons Initial Monthly 0.01 mg/L

3. Analyze Ground Water for Hydrocarbon Contamination.

All other parameters listed on the Ground Water Discharge Limits table must be analyzed prior to ground water discharge to the storm water system. If no limits are exceeded, ground water discharge to on-site ditches. Analytical results shall be on-site or readily available for review by local, state or federal inspectors. Note that this step is frequently done simultaneously with Step 2 above to shorten analytical processing time.

4. Pollution Prevention Measures.



Issued: 04-28-17

A storm water pollution prevention plan or pollution control plan shall be developed and implemented prior to any ground water discharges to the storm water system. The plan's objectives are to limit erosion and scour of the storm water system, and minimize Total Suspended Solids (TSS) and other forms of contamination, and prevent any damage to the storm water system. Note that ground water discharges must cease immediately upon the first recognition of contamination, either by sensory or analytical methods. If the discharge of groundwater results in any damages to the storm water system, the responsible party shall remediate any damage to the storm water system and the environment to the satisfaction of the Storm Water Department and/or any State or Federal Regulatory Agency.

G. Other groundwater disposal alternatives or solutions may be approved by the Engineer on a case by case basis.

3.7 SURFACE WATER CONTROL

A. Intercept surface water and divert it away from excavations through the use of dikes, ditches, curb walls, pipes, sumps or other approved means.

B. Divert surface water into sumps and pump into drainage channels or storm drains, when approved by the Engineer. Provide settling basins when required by the Engineer.

C. Storm water that enters the excavation can be pumped out as long as care is taken to minimize solids and mud entering the pump suction and flow is pumped to a location that allows for sheet flow prior to entering a storm water drainage ditch or storm water inlet. An alternative to sheet flow is to pump storm water to an area where ponding occurs naturally without leaving the designated work area or by manmade berm(s) prior to entering the storm water system. Sheet flow and ponding is required to allow solids screening and/or settling prior to entering the storm water system. Storm water or groundwater shall not be discharged to private property.


END OF SECTION


Issued: 04-28-17

PART1 GENERAL


SECTION 32 31 13

FENCES AND GATES

A. Fence framework, fabric, and accessories.

B. Excavation for post bases; concrete foundation for posts.

C. Manual gates and related hardware.


A. Section 03 30 00 - Cast-in-Place Concrete: Concrete anchorage for posts.


A. ASTM A123/A123M - Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products; 2015.

B. ASTM A153/A153M - Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware; 2009.

C. ASTM A 1011/A 1011 M - Standard Specification for Steel, Sheet and Strip, Hot-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, and Ultra-High Strength; 2014.

D. ASTM C94/C94M - Standard Specification for Ready-Mixed Concrete; 2015.

E. ASTM F567 - Standard Practice for Installation of Chain-Link Fence; 2011.

F. CLFMI CLF 2445 - Product Manual; 1997.

1.4 SUBMITTALS

A. See Uniform General Conditions and General Supplementary Conditions

PART 2 PRODUCTS

2.1 MANUFACTURERS

NOT USED

2.2 MATERIALS AND COMPONENTS

A. Materials and Components: Conform to CLFMI CLF 2445.


32 31 13- 1 FENCES AND GATES 100% Construction Specifications

Issued: 04-28-17

2.3 ACCESSORIES

A. Caps: Cast steel galvanized; sized to post diameter, set screw retainer.

B. Fittings: Sleeves, bands, clips, rail ends, tension bars, fasteners and fittings; steel.

2.4 FINISHES

A. Components (Other than Fabric): Galvanized in accordance with ASTM A 123/A 123M, at 1.7 oz/sq ft.

PART 3 EXECUTION

3.1 INSTALLATION

A. Install framework, fabric, accessories and gates in accordance with ASTM F567.

B. Place fabric on outside of posts and rails.

C. Line Post Footing Depth Below Finish Grade: ASTM F567.

D. Corner, Gate and Terminal Post Footing Depth Below Finish Grade: ASTM F567.

E. Brace each gate and corner post to adjacent line post with horizontal center brace rail and diagonal truss rods. Install brace rail one bay from end and gate posts.

F. Stretch fabric between terminal posts or at intervals of 100 feet maximum, whichever is less.

G. Position bottom of fabric 2 inches above finished grade.


END OF SECTION

32 31 13- 2 FENCES AND GATES 100% Construction Specifications

Issued: 04-28-17

SECTION 32 92 23

SODDING

PART1 GENERAL

1.1

1.2

SECTION INCLUDES

A. Preparation of subsoil.

B. Placing topsoil.

C. Fertilizing.

D. Sod installation.

E. Maintenance.

RELATED REQUIREMENTS

A. Section 31 22 00 - Grading: Topsoil material.

B. Section 31 22 00 - Grading: Preparation of subsoil and placement of topsoil in preparation for the work of this section.

C. Section 31 23 23 - Fill: Topsoil material.

1.3 DEFINITIONS

1.4

1.5

1.6

A. Weeds: Includes Dandelion, Jimsonweed, Quackgrass, Horsetail, Morning Glory, Rush Grass, Mustard, Lambsquarter, Chickweed, Cress, Crabgrass, Canadian Thistle, Nutgrass, Poison Oak, Blackberry, Tansy Ragwort, Bermuda Grass, Johnson Grass, Poison Ivy, Nut Sedge, Nimble Will, Bindweed, Bent Grass, Wild Garlic, Perennial Sorrel, and Brome Grass.

A.

A.

A.

B.

REFERENCE STANDARDS

TPI (SPEC) - Guideline Specifications to Turfgrass Sodding; 2006.

SUBMITTALS

See Uniform General Conditions and General Supplementary Conditions.

REGULATORY REQUIREMENTS

Comply with regulatory agencies for fertilizer and herbicide composition.

Provide certificate of compliance from authority having jurisdiction indicating approval of fertilizer and herbicide mixture.

100051538 32 92 23- 1 SODDING 100% Construction Specifications


1.7 DELIVERY, STORAGE, AND HANDLING

A. Deliver sod on pallets. Protect exposed roots from dehydration.

B. Do not deliver more sod than can be laid within 24 hours.

PART 2 PRODUCTS

2.1 MA TE RIALS

A. Sod: TPI (SPEC), Certified Turfgrass Sod quality; cultivated grass sod; type indicated in plant schedule on Drawings; with strong fibrous root system, free of stones, burned or bare spots; containing no more than 5 weeds per 1000 sq ft. Minimum age of 18 months, with root development that will support its own weight without tearing, when suspended vertically by holding the upper two corners.

B. All fertilizer used on site shall be delivered in bags or containers that are clearly labeled according to the Association of American Plant Food Control Officials (AAPFCO) protocol. Five required components must appear on a fertilizer's label, including the brand, the grade, guaranteed analysis, net weight, and name and address of the registrant or licensee. The fertilizer may be subject to testing by the Texas State Chemist in accordance with the Texas Commercial Fertilizer Rules or Texas Fertilizer Control Act.

2.2 ACCESSORIES

A. Edging: Galvanized steel.

PART 3 EXECUTION

3.1 PREPARATION

A. Prepare subgrade in accordance with Section 31 22 00.

B. Place topsoil in accordance with Section 31 22 00.

3.2 FERTILIZING

A. Apply fertilizer in accordance with manufacturer's instructions.

B. Apply after smooth raking of topsoil and prior to installation of sod.

C. Apply fertilizer no more than 48 hours before laying sod.

D. Mix thoroughly into upper 2 inches of topsoil.

E. Lightly water to aid the dissipation of fertilizer.

3.3 LA YING SOD

A. Moisten prepared surface immediately prior to laying sod.


32 92 23- 2 SODDING 100% Construction Specifications

Issued: 04-28-17

B. Lay sod immediately after delivery to site to prevent deterioration.

C. Lay sod smooth and tight with no open joints visible, and no overlapping; stagger end joints 12 inches minimum. Do not stretch or overlap sod pieces.

D. Where new sod adjoins existing grass areas, align top surfaces.

E. Where sod is placed adjacent to hard surfaces, such as curbs, pavements, etc., place top elevation of sod 1/2 inch below top of hard surface.

F. On slopes 6 inches per foot and steeper, lay sod perpendicular to slope and secure every row with wooden pegs at maximum 2 feet on center. Drive pegs flush with soil portion of sod.

G. Prior to placing sod, on slopes exceeding 8 inches per foot or where indicated, place wire mesh over topsoil. Securely anchor in place with wood pegs sunk firmly into the ground.

H. Water sodded areas immediately after installation. Saturate sod to 4 inches of soil.

I. After sod and soil have dried, roll sodded areas to ensure good bond between sod and soil and to remove minor depressions and irregularities. Roll sodded areas with roller not exceeding __ lbs.

3.4 MAINTENANCE

A. Provide maintenance at no extra cost to Owner; Owner will pay for water.

B. Mow grass at regular intervals to maintain at a maximum height of 2-1/2 inches. Do not cut more than 1/3 of grass blade at any one mowing.

C. Neatly trim edges and hand clip where necessary.

D. Immediately remove clippings after mowing and trimming.

E. Water to prevent grass and soil from drying out.

F. Roll surface to remove irregularities.

G. Control growth of weeds. Apply herbicides in accordance with manufacturer's instructions. Remedy damage resulting from improper use of herbicides.

H. Immediately replace sod to areas that show deterioration or bare spots.

I. Protect sodded areas with warning signs during maintenance period.


END OF SECTION

32 92 23- 3 SODDING 100% Construction Specifications

Issued: 04-28-17

SECTION 32 11 23 AGGREGATE BASE COURSES -...

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