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General Vang Pao Park Section 311000
February 2026 Site Preparation
A. The Contractor shall have Underground Service Alert mark all existing public utilities as a first order of work. Additionally, the Contractor shall have a locating service mark all existing private utilities within the limits of work.
B. The Contractor shall pothole each existing utility that will be extended or reused at its point of cut and removal to confirm the actual locations and depths as well as all proposed crossings as shown on the drawings. Notify Engineer of results via the RFI process.
C. Existing water, sewer, storm drain, gas, electrical, communication (data) services and laterals to be abandoned or removed as indicated on the plans shall be provided with replacement facilities as to comply with construction sequencing requirements and limit utility/service outages as required by the Owner.
D. See Utility, and Civil plans for detailed removal/replacements requirements.
3.9 CLEAN UP
A. Remove all debris and stains resulting from the work of this section.
END OF SECTION
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General Vang Pao Park Section 312000
February 2026 Earthwork
Section 312000
EARTHWORK
PART 1 - GENERAL
1.1 SECTION INCLUDES
A. Description of suitable materials for earthwork operations.
B. Definitions of terms.
C. Description of the duties and responsibilities of the Geotechnical Engineer.
D. Excavate earth, rock, and all material regardless of character and subsurface conditions.
E. Requirements for excavation, over excavation, and disposal of surplus and unsuitable material off the project site.
F. Dewatering of excavations.
G. Spread and compact engineered/import/select fill.
1.2 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including the Division 01 Specification Section, apply to this Section.
B. Related Sections include the following:
1. Site Preparation - Section 311000
2. Trenching, Backfilling and Compaction - Section 312316
1.3 REFERENCES
A. Reference Data:
1. If the year of the adoption or latest revision is omitted from the designation, it shall mean the specification, manual, or test designation in effect the date the Notice to Proceed with the Work is given.
1.4 EXISTING CONDITIONS
A. It is the Contractor's responsibility to achieve the finished grades shown on the plan, and to determine the quantity of and provide for soil import or export required to achieve plan grades.
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1.5 SUBMITTALS
A. Submit test reports and compaction curve analysis for engineered fill required in accordance with Submittal requirements, including Geotechnical Report.
1.6 DEFINITIONS
A. Standard Specifications
1. Where referred to in these specifications, "Standard Specifications" shall mean the State of California Standard Specifications, latest edition. All work shall be carried out in conformance with the Standard Specification, unless otherwise specified herein.
2. Where referred to in these specifications, "County" shall mean the latest edition of the standard code, regulations, plans, and drawings of Merced County. All work shall be carried out in conformance with the referenced standards.
3. Site Grading shall comply with the applicable sections of Title 24 and of Appendix J of the California Building Code, latest adopted edition.
B. Percent Compaction -- As referred to in these specifications, percent compaction is the required in-place dry density of the material, expressed as a percentage of the maximum dry density of the same material determined by the ASTM D 1557 test procedure.
C. Optimum Moisture Content -- As referred to in these specifications, optimum moisture content is the moisture content, percent (by dry weight), corresponding to the maximum dry density of the same material as determined by the ASTM D 1557 test procedure.
D. Soil Subgrade – Where used in these specifications, soil subgrade shall mean within exterior slab areas, the surface on which aggregate base material is placed, and within building areas, the surface on which footings bear and/or on which floor slab structural section is placed.
PART 2 - PRODUCTS
2.1 IMPORT FILL
A. Import fill shall be material consisting of soil and rock mixtures that: 1) are free of organic material. 2) have a Liquid Limit less than 40 and a Plasticity Limit of less than 20, and 3) have a maximum particle size of 6 inches.
B. In general, the onsite soils, to the extent that they may be available, will be suitable for use as fill, provided they are prepared as described below.
C. General engineered fill shall be approved by the Soils Engineer prior to fill placement.
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PART 3 - EXECUTION
3.1 SPILLAGE, DUST AND EROSION CONTROL
A. The Contractor shall prevent spillage when hauling on or adjacent to any public streets or highways. In the event that such occurs, the Contractor shall remove all spillage and sweep, wash or otherwise clean such streets or highways as required by local and County authorities and/or the State of California.
B. The Contractor shall take all precautions needed to prevent a dust nuisance to adjacent public or private properties and to prevent erosion and transportation of soil to downstream adjacent properties. Any damage so caused shall be corrected or repaired by the Contractor at no cost to the Owner.
3.2 EXCAVATION
A. Following clearing and stripping, over excavate existing subgrade materials in non-building areas to planned subgrade. The over excavations should extend three feet beyond the edges of exterior hardscape edges, as required. The over excavated materials may be stockpiled and reused as properly placed compacted/engineered fill. The excess and unsuitable excavated material shall be disposed of properly, offsite.
B. The upper 8” of all exposed exterior hardscape subgrade soils shall be scarified, thoroughly moistureconditioned to at least 3% above optimum moisture content, and compacted to at least 90% relative compaction. The upper 6” of subgrade in asphalt pavement areas shall be compacted to at least 95% relative compaction.
C. Once compacted, the subgrade materials should be maintained at least 3 percentage points above optimum moisture content prior to placement of additional fill or aggregate base material. This is likely to require periodic sprinkling during the dry season. Should drying of the soils occur, they should again be scarified, moisture-conditioned to the proper moisture content and recompacted.
D. Recompacted subgrade shall have a firm and unyielding surface under the observation of the Geotechnical Engineer or their designated representative. If excessive pumping or instability is observed, over excavation and the placement of a stabilizing fabric and a 12” to 18” thick layer of class 2 aggregate base may be required by the project Geotechnical Engineer.
E. Final surfaces exposed by the completed excavations (cutting) shall be finished true to line and grade.
Depressions shall be filled and compacted, and loose material shall be removed.
F. Temporary construction slopes shall not exceed requirements set forth in Cal-OSHA Industrial Safety Orders, or ratio suggested in the field by the Geotechnical Engineer.
G. It is the Contractor's responsibility to achieve the finished grades shown on the plan, and to determine the quantity of and provide for soil import or export required to achieve plan grades H. Contractor to procure and refer to Geotechnical Investigation Report for further requirements.
3.3 FIELD QUALITY CONTROL
A. The Geotechnical Engineer will observe the excavation, soil removal, moisture-conditioning and recompaction operations. After the completion of these operations and before placement of fill, the Contractor shall obtain the Geotechnical Engineer's approval of the site preparation in each area.
3.4 DEWATERING
A. During excavation activities, groundwater may be encountered. The contractor is responsible for accounting in their bid the necessary equipment required to remove groundwater from excavations to allow for the proper placement of fill per the Geotechnical Report to be procured by Contractor.
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General Vang Pao Park Section 312000
February 2026 Earthwork
B. Groundwater shall be discharged through a silt-sack type device at the outlet end of the discharge pipe to allow for filtration.
C. Silty water shall not be discharged to any storm drain.
3.5 PLACEMENT MOISTURE CONDITIONING AND COMPACTION
A. Exposed subgrade materials shall be ripped, moisture-conditioned, and compacted as noted in Paragraph
3.02B. above. Onsite fill materials to be used in exterior hardscape areas should subsequently be placed in loose, horizontal lifts of 8 inches thick or less, moisture-conditioned to within 2% of optimum moisture content or as directed in the field by the project Geotechnical Engineer, and uniformly compacted to at least 90% relative compaction. The upper 6” of subgrade in asphalt pavement areas shall be compacted to at least 95% relative compaction
B. All site preparation and fill placement should be observed by a representative of the Geotechnical Engineer.
C. Where field density tests indicate that required compaction and/or moisture content has not been attained, the fill shall be reconditioned as necessary and recompacted to the required density and/or moisture content prior to placing additional material. The Contractor shall be responsible for placing, moisture conditioning and compacting approved material in accordance with these specifications.
D. Sufficient testing and inspection should be performed to assure compliance with the recommended compaction standards. Samples of proposed native or imported fill should be submitted to the Geotechnical Engineer material testing laboratory for assessment at least 48 hours prior to placement or importing to the site (whichever is soonest).
3.6 FINISH
A. Fill slopes shall be compacted by slope rolling and trimming or shall be overfilled and trimmed back to planned grade. The completed fill shall be finished true to line and grade. Depressions shall be filled and compacted and all loose material shall be removed.
B. After completion of compaction and finish grading operations, fill slopes, horizontal surfaces disturbed by construction operations, and cut slopes shall be moisture conditioned and ‘trackwalked’ to provide a firm and uniformly roughened surface free of loose material.
C. See also requirements in landscape specifications for slope and landscaped area requirements.
3.7 CLEAN UP
A. Remove all debris and stains resulting from the work of this section, including any and all excess material, which shall be removed from the project site.
END OF SECTION
312300 - 1
General Vang Pao Park Section 312300
February 2026 Structural Excavation and Fill
SECTION 312300
STRUCTURAL EXCAVATION AND FILL
PART 1 – GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. This Section Includes:
1. Excavation for foundations and pits.
2. Backfilling structural excavations as required.
3. Fill over concrete mat foundations.
B. Related Sections:
1. Concrete Forming and Accessories – Section 31000
2. Earthwork – Section 312000
1.3 REFERENCES
A. ASTM: Standards of the American Society for Testing and Materials (ASTM) apply where cited in this Section.
B. American Concrete Institute (ACI):
1. ACI 301 - Specifications for Structural Concrete for Buildings, 2010.
2. ACI 229R – Controlled Low Strength Materials, 2013.
C. California Department of Transportation’s (Caltrans):
1. CSS - Standard Specifications, 2010.
1.4 SITE CONDITIONS
A. Notify Owner’s Representative when site conditions differ from findings of Geotechnical Investigation Report, procured and provided by Contractor.
PART 2 – PRODUCTS
2.1 MATERIALS
A. Concrete: Concrete materials and proportions shall be in accordance with ACI 301 to produce concrete with minimum compressive strength of 2500 psi at 28 days.
B. Structural Fill: CSS Section 26, Class 2 Aggregate Base rock, 3/4” size.
C. Controlled Low Strength Material: Machine mixed, self-compacting, low-strength fill consisting of fine aggregate, cementitious materials, entrained air and water. Mix and mixing shall conform to recommendations of ACI 229 to achieve the following properties:
1. Slump: 8 to 10 inches.
2. Compressive Strength:
a. For backfill: Minimum 150 psi to maximum 300 psi at 30 days. b. For fill beneath footings: Minimum 300 psi at 30 days.
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February 2026 Structural Excavation and Fill
3. Fresh Density: 115 to 145 pounds per cubic.
4. Subsidence: Minimal; a maximum of 1/16” per foot of thickness.
D. Pea Gravel: ASTM C 33, Size No 7.
1. Fill material (over mat foundation): Crushed rock of uniform gradation, 100% passing 3/4 inch sieve.
PART 3 – EXECUTION
3.1 PREPARATION
A. Take measures to prevent surface water from entering excavations.
B. Notify Geotechnical Engineer at least 48 hours prior to commencing and upon completion of excavations.
3.2 EXCAVATION
A. Accurately cut foundation excavations to dimensions and elevations shown on Drawings to tolerances of ACI 301.
B. Where sides are unstable or excavations are not accurately cut, over-excavate to permit placement and removal of formwork.
C. Shore and brace excavations as required to prevent caving and danger to persons and structures.
Comply with applicable safety regulations.
D. Prepare bottoms of footing excavations to produce conditions acceptable to Owner’s Representative, based on professional opinion of Geotechnical Engineer.
1. The bottoms of excavations shall be firm, undisturbed earth, clean and free from loose material, debris and foreign matter.
2. Remove or recompact disturbed material.
3. Remove soft or unstable material to a depth satisfactory to Geotechnical Engineer.
4. Fill over-depth excavations with concrete, flowable fill, or structural fill compacted to minimum 95% relative compaction.
E. Maintain footing conditions approved by Geotechnical Engineer until concrete work is complete.
1. In periods of wet weather, over-excavate footings and place 2-inches minimum concrete mud-slab as soon as practical after completing excavation.
F. Keep excavations free of water at all times until foundation concrete is cast.
G. Stockpile or remove excavated material from site in accordance with Division 31 Section “Earthwork”.
3.3 BACKFILLING
A. Place and compact fill in accordance with Section 312000, “Earthwork”.
1. Use pea gravel or controlled density material for backfill against sides of footings and pits, where adequate compaction of structural fill cannot be achieved.
B. Backfill footings after formwork is removed. Do not backfill pits until concrete has cured a minimum of 7 days.
3.4 FILL OVER CONCRETE MAT FOUNDATIONS
A. Preparation:
1. Verify piping is securely supported against vertical and lateral displacement.
2. Where area is not enclosed prior to placement of fill, make provision for removal of water.
B. Placement: Fill may be placed to the full specified thickness without compaction.
1. Pipes: Bed pipes in fill up to grade of underside of pipe, taking care not to place material atop pipe.
Shovel slice material under and beside the pipe up to the spring line without moving the pipe.
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February 2026 Structural Excavation and Fill
C. Consolidation: Immediately prior to placement of vapor retarder, consolidate surface with a minimum of 3 passes of a vibratory plate. Achieve specified grade to plus 0 inch to minus 1-1/2 inch tolerance.
3.5 FIELD QUALITY CONTROL
A. The Geotechnical Engineer will observe footing excavations prior to placement of reinforcement; and again, immediately prior to casting of concrete.
B. The Geotechnical Engineer will observe the placement of fill and backfill material.
END OF SECTION
312316 - 1
General Vang Pao Park Section 312316
February 2026 Trenching, Backfilling, and Compaction
SECTION 312316
TRENCHING, BACKFILLING AND COMPACTION
PART 1 - GENERAL
1.1 SECTION INCLUDES
A. Locate and mark existing utilities within the limits of work.
B. Trenching and other excavation needed for the installation of pipe (storm drain, water, sanitary sewer and gas) and appurtenances.
C. Provide and install bedding material as specified for each type of utility.
D. Backfill and compact trenches and excavations with suitable material, as specified.
E. Provide and install subbedding material as required.
1.2 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including the Division 01 Specification Sections apply to this Section.
B. Related Sections include the following:
1. Site Drainage – Section 334000
2. Water Utility Distribution Piping – Section 331100
1.3 SUBMITTALS
A. In accordance with, Administrative Requirements Specifications:
1. Sand equivalent and gradation analysis of bedding and backfill materials.
1.4 REFERENCES
A. Standard Specifications
1. Where referred to in these specifications, "Standard Specifications" shall mean the State of California Department of Transportation Standard Specifications, latest edition. All work shall be carried out in conformance with the Standard Specifications unless otherwise specified herein.
1.5 EXISTING SITE CONDITIONS
A. The Contractor shall have Underground Service Alert mark all existing public utilities as a first order of work. Additionally, the Contractor shall have a locating service mark all existing private utilities within the limits of work.
B. The Contractor shall pothole each existing utility that will be extended or reused at its point of cut and removal to confirm the actual locations and depths, as well as all proposed crossings as shown on the drawings. Notify Engineer of results via the RFI process.
C. Existing water, sewer, storm drain, gas, electrical, communication (data), etc. services and laterals to be abandoned or removed as indicated on the plans shall be provided with replacement facilities as to comply with construction sequencing requirements and limit utility/service outages as required by the Owner. See Mechanical, Electrical, and Civil plans for detailed removal/replacements requirements.
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February 2026 Trenching, Backfilling, and Compaction
D. The Contractor shall acquaint himself with all site conditions. If unknown/unmarked active utilities are encountered during the work, the Engineer shall be promptly notified for instruction via the RFI process.
Failure to notify will make the Contractor liable for damage to these utilities arising from Contractor’s operations subsequent to his discovery of such unknown/unmarked utilities.
E. The Contractor shall review the Soils Investigation and plan their work accordingly.
1.6 QUALITY ASSURANCE
A. Testing Agency: The project Geotechnical Engineer representative (Inspector) shall verify the adequacy of sub-bedding conditions and monitor bedding, backfilling, and compaction operations. Geotechnical report to be procured and provided by Contractor.
B. Unsatisfactory Conditions: The Inspector will advise the Contractor immediately if unsatisfactory conditions or test results are observed. The area where compaction is unsatisfactory shall be reworked until the required density has been attained. The Inspector shall have the authority to reject structural bedding or backfill until unsuitable material has been replaced and/or rework, as needed, has taken place. It shall be the sole responsibility of the Contractor to achieve the specified degree of compaction.
1.7 PROTECTION FROM CAVING
A. Construction Safety Orders
1. Nothing in this section shall be deemed to allow the use of a shoring, sloping, or protective system less effective than that required by the Construction Safety Orders. The Contractor shall take all necessary measures to protect the workmen and adjacent areas and structures from the hazards of the trenching or excavation operations. Sheet piling and other sheeting shall be withdrawn in such a manner as to prevent caving at the walls of excavation or damage to piping or other structures.
Except as may be hereinafter modified, no sheeting shall be left in the trench and no backfill shall be made against the sheeting before it is removed. Any sheeting extending below the invert of the pipe shall be left in place by cutting off in a manner satisfactory to the Inspector.
B. Liability
1. Nothing in this section shall be construed to impose tort liability on the Architect or the Design Engineer.
PART 2 - PRODUCTS
2.1 TRENCH STABILIZATION SUBBEDDING
A. Drain rock for trench stabilization subbedding shall be of the nominal sizes designated as 3/4” x 1/4”.
2.2 BEDDING MATERIAL (STORM DRAIN, WATER AND SANITARY SEWER) A. Bedding material shall be well graded sand free from vegetable matter and refuse.
B. The minimum sand equivalent value shall be 30.
C. The grading shall conform to the following:
Sieve Percentage Passing
Minimum Maximum
1” 100 100
3/4" 100 100
3/8” 100 100
No. 4 90 100
No. 200 0 5
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2.3 BEDDING MATERIAL (GAS)
A. Bedding material for gas line installation shall be backfill sand meeting the requirements of the PG&E Green Book.
2.4 BACKFILL
A. In non-hardscape areas (as shown on the Increment 3 set of plans), backfill material may be native excavated material free of vegetable matter, refuse and other unsatisfactory material.
B. The backfill material shall be free of stone and lumps exceeding 4 inches in greatest dimension.
C. Backfill material shall have minimum Plastic Index (PI) value of 15. Liquid limit (LL) value shall be no more than 40.
D. Granular trench backfill material may be used in lieu of native material at the Contractor's option.
2.5 GRANULAR BACKFILL MATERIAL
A. Within paved and other hardscape areas, the upper 12” of backfill for trenches shall be Caltrans Class 2 aggregate base.
B. Granular backfill material, above bedding material, and below class 2 aggregate base, shall be gravel, sand or rock material free from deleterious materials, shall be used in hardscape areas.
C. Minimum sand equivalent value shall be 25.
D. Granular backfill material shall conform to the following:
Sieve Size Percentage Passing
3" 100
3/4" -
3/8" -
No. 4 40 - 100
No. 30 10-100
No. 200 -
PART 3 - EXECUTION
3.1 EXCAVATION
A. The Contractor shall make all necessary excavations to construct the work shown on the Drawings, in accordance with trench detail appropriate to the utility being installed, and applicable local and/or County Standards.
B. The Contractor shall perform all excavations of every description and all substances encountered to the depth indicated on the drawings. During excavation, that material suitable for backfilling shall be deposited in an orderly manner, a sufficient distance from the banks for the trench to avoid overloading and to prevent slides or cave-ins. All excavated material not required or suitable for backfill shall be removed and properly disposed of offsite.
C. Excavation shall include the removal of all materials or surface obstructions of any nature that would interfere with the execution of the work, and such items shall be returned to their equivalent preconstruction condition after installation of utilities.
D. All trench excavation work shall conform to the Division of Industrial Safety Construction Safety Orders, which are currently in use.
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February 2026 Trenching, Backfilling, and Compaction
3.2 TRENCH WIDTH AND DEPTH
A. The maximum allowable width of trench measured at the top of the pipe shall be the outside diameter of the pipe exclusive of bells and collars, plus twenty-four (24) inches, and such maximum width shall be inclusive of all trench sheeting. Minimum width of trench for pipes 18” diameter and less shall be pipe diameter plus 6”. Maximum width of trench for pipes 18” diameter and less shall be pipe diameter plus 9”.
Minimum width of trench for pipes 18” diameter and greater shall be pipe diameter plus 9”. Maximum width of trench for pipes 18” diameter and greater shall be pipe diameter plus 12”. Whenever the maximum allowable trench width is exceeded for any reason, the Contractor shall, at his expense, embed or cradle the pipe in concrete in a manner satisfactory to the Engineer.
B. The trench shall be excavated to the dimensions and depth shown on the Drawings and in a manner, which will produce a firm foundation for supporting the entire length of each section of pipe. Bell holes shall be provided so that the load is carried on the pipe barrel.
C. Minimum cover for domestic and recycled/reclaimed water lines shall be 24”.
D. Minimum cover for fire water lines shall be 42”.
E. Minimum cover for gas lines shall be 30”.
3.3 CONTROL OF WATER
A. The Contractor, at his own expense, shall provide sufficient pumping equipment, and the operation thereof, to remove ground water from the excavation.
B. Water shall be disposed of in such a manner as to cause no injury to public or private property, nor be a menace to the public health. Discharges directly to storm drainage systems, ditches, and creeks shall not be allowed.
C. Dewatering shall be performed under a Contractor obtained permit from the local municipality/County (if discharge is to the sewer system) or the Regional Water Quality Control Board (if discharge is to the storm drain system) as applicable. The Contractor is advised that all of these agencies may require testing of the proposed dewatering discharge for contaminants. It shall be the sole responsibility of the Contractor to apply for and obtain the necessary permits, obtain and pay for any required water quality tests, design shoring and dewatering systems, and pay any fees associated with discharging the water to the sanitary sewer system if that option is selected. Permits must be obtained prior to any discharge occurring.
3.4 UNSUITABLE SUB-BEDDING
A. Where soft, wet, spongy, or unsuitable trench foundation is encountered, sub-bedding material shall be placed under the pipe to facilitate construction. The cost of furnishing and placing sub-bedding material shall be included in the price bid for the job.
3.5 BRACING EXCAVATIONS
A. Excavations shall be so braced and supported that they will be safe, and the ground alongside the excavation will not slide or settle, and all existing improvements of any kind, either on public or private property will be fully protected from damage.
B. If any damage does result to such improvements, the Contractor shall make the necessary repairs or reconstruction at his own expense.
3.6 PIPE BEDDING (STORM DRAIN, WATER AND SANITARY SEWER) A. Bedding material shall be placed under the pipe before the pipe joints have been completed and inspected.
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February 2026 Trenching, Backfilling, and Compaction
B. Bedding material shall be placed carefully around and under the pipe in horizontal layers 4 inches thick after compaction.
C. The bedding material shall be brought up uniformly on each side of the pipe.
D. Bedding material shall have the proper moisture content to assure maximum compaction by using hand or pneumatic tampers.
E. Bedding shall be accomplished in a manner which will not disturb the pipe but will secure a relative compaction of 90 percent.
F. Bedding shall be installed up to 4 inches below and 12” over the top of the pipe.
3.7 PIPE BEDDING (GAS)
A. Bedding material shall be placed under the pipe before the pipe joints have been completed and inspected.
B. Bedding material shall be placed carefully around and to the sides of the pipe in horizontal layers 4 inches thick after compaction.
C. No compaction is allowed directly above the pipe until there is at least 12” of cover.
D. The bedding material shall be brought up uniformly on each side of the pipe.
E. Bedding material shall have the proper moisture content to assure maximum compaction by using hand or pneumatic tampers.
F. Bedding shall be accomplished in a manner which will not disturb the pipe but will secure a relative compaction of 90 percent.
G. Bedding shall be installed at least 2 inches below and 12” over the top of the pipe.
3.8 TRENCH BACKFILL
A. Backfill material shall be placed after the pipe and bedding have been inspected by the Inspector. Native backfill may be used, at the contractor’s option, outside of exterior slab and pavement areas. All other areas shall use Caltrans Class 2 aggregate base in the upper 12 inches of the trench backfill. All trenches shall be backfilled to pavement or exterior slab structural section subgrade, or to finished grade in unpaved areas.
B. Backfill and compaction of utility trenches in and immediately adjacent to building pads, driveways, parking, and other flatwork areas should be such that no settlement will occur.
C. Where trenches closely parallel a footing and the trench bottom is within a 2 horizontal to 1 (one) vertical plane, projected outward and downward from any structural element, grout slurry should be utilized to backfill that portion of the trench below this plane. The use of slurry backfill is not required where a narrow trench crosses a footing at or near a right angle.
D. Granular Backfill (Non-native)
1. The backfill material shall be placed in layers not exceeding 6" in uncompacted thickness.
2. Compaction may be accomplished by adding sufficient water to the material as it is placed in the trench to achieve 90 percent relative compaction.
3. Supplemental compactive effort using vibratory means shall be employed if necessary to obtain specified degree of compaction.
4. Ponding or the use of excessive amounts of water will not be allowed.
5. Vibratory or other compaction equipment shall be used whenever necessary to obtain the required compaction, and must be used within 12 inches of pavement subgrade in paved areas, where compaction is required to be 95% R.C.
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February 2026 Trenching, Backfilling, and Compaction
E. Native Backfill
1. Native backfill material shall be placed in layers not exceeding 6" in uncompacted thickness.
2. Compaction may be accomplished by adding sufficient water to the material as it is placed in the trench to achieve between 90 to 95 percent relative compaction.
3. Supplemental compactive effort using vibratory means shall be employed if necessary to obtain specified degree of compaction.
4. Ponding or the use of excessive amounts of water will not be allowed.
5. Vibratory or other compaction equipment shall be used whenever necessary to obtain the required compaction.
3.9 CLEAN UP
A. Remove all debris and stains resulting from the work of this section.
END OF SECTION
General Vang Pao Park Section 31 25 14.13
February 2026 Hydroseed
31 25 14.13
SECTION 31 25 14.13
HYDROSEED
GENERAL
1.01 SUMMARY
A. This section specifies the hydraulically-applied erosion control product category of High Performance-Flexible Growth Medium (HP-FGM). The HP-FGM shall be is a biodegradable, High Performance-Flexible Growth Medium (HP-FGM) composed of 100% recycled, thermally refined virgin wood fibers, crimped biodegradable interlocking fibers derived from regenerated cellulose sourced from sustainably harvested wood, micro-pore granules, naturally derived cross-linked biopolymers and water absorbents. The HP-FGM is patented, made in the US, plastic-free, and phytosanitized to eliminate potential weed seeds and pathogens. The product requires no curing period and upon application forms an intimate bond with the soil surface to create a continuous, porous, absorbent and flexible erosion resistant blanket that allows for rapid germination and accelerated plant growth.
B. Related Sections: Other Specification Sections, which directly relate to the work of this Section include, but are not limited to the following:
1. Section 312000 – Earthworks
1.02 SUBMITTALS
A. Product Data: Submit manufacturer’s product data and installation instructions. Include required substrate preparation, list of materials and application rate.
B. Certifications: Manufacturer shall submit a letter of certification that the product meets or exceeds all technical and packaging requirements and is made in the U.S.A.
1.03 DELIVERY, STORAGE AND HANDLING
A. Deliver materials and products in UV and weather-resistant factory labeled packages. Store and handle in strict compliance with manufacturer’s instructions and recommendations. Protect from damage, weather, excessive temperatures and construction operations.
General Vang Pao Park Section 31 25 14.13
February 2026 Hydroseed
31 25 14.13
PRODUCTS
2.01 MATERIALS
A. The HP-FGM shall conform to the following typical property values when uniformly applied at a rate of 3,500 pounds per acre (3,900 kilograms/hectare) under laboratory conditions.
Property Test Method Tested Value (English) Tested Value (SI) Physical
Mass/Unit Area ASTM D6566 ≥11.6 oz/yd2 ≥390 g/m2
Thickness ASTM D65251 ≥ 0.22 inch ≥ 5.6 mm
Ground Cover ASTM D65671 ≥ 99% ≥ 99%
Water Holding
Capacity
ASTM D7367 ≥ 1,700% ≥ 1,700%
Material Color Observed Green Green
Performance
Cover Factor2 ASTM D8298-
Type 1
≤ 0.01 ≤ 0.01
% Effectiveness3 ASTM D8298-
Type 1
≥ 99% ≥ 99%
Vegetation
Establishment
ASTM D73221 ≥ 800% ≥ 800%
Functional Longevity4 ASTM D5338 ≤ 18 months ≤ 18 months Cure Time Observed 0 - 2 hours 0 - 2 hours
Environmental
Properties Ecotoxicity5 EPA 2021.0 Non-Toxic Non-Toxic
Biodegradability ASTM D5338 Yes Yes
Certified BioPreferredÆ
Biobased Content ASTM D6866 100% 100%
Elemental Impurity
Limits
ASTM D8082 Pass Pass
Carbon Footprint6 Life Cycle
Assessment
≤0.4 Unit CO2e/
Unit of product7
≤0.4 Unit CO2e/
Unit of product7
1. ASTM test methods developed for Rolled Erosion Control Products and have been modified to accommodate Hydraulically-Applied Erosion Control Products.
2. Cover Factor is calculated as soil loss ratio of treated surface versus an untreated control surface.
3. % Effectiveness = One minus Cover Factor multiplied by 100%.
4. Large scale testing conducted at Utah Water Research Laboratory. For specific testing information please contact a Manufacturer representative.
5. Functional Longevity is estimated time period, based upon ASTM D5338 testing and field observations, that a material can be anticipated to provide erosion control and agronomic benefits as influenced by composition, as well as site-specific conditions, including; but not limited to – temperature, moisture, light conditions, soils, biological activity, vegetative establishment and other environmental factors.
6. Cradle to factory gate (Conover, NC) life cycle assessment.
7. “Carbon dioxide equivalent” or CO2e is a term for describing different greenhouse gases in a common unit. For any quantity and type of greenhouse gas, CO2e signifies the amount of CO2 which would have the equivalent global warming impact. The unit of CO2e per unit of product is a consistent ratio based on mass, regardless of what unit of mass is chosen. For instance, there is 0.4 kg of CO2e per kg of product or 0.4 oz CO2e per oz of product.
General Vang Pao Park Section 31 25 14.13
February 2026 Hydroseed
31 25 14.13
2.02 COMPOSITION
A. All components of the HP-FGM shall be pre-packaged by the Manufacturer to assure both material performance and compliance with the following values. Under no circumstances shall field mixing of components be permitted. No chemical additives with the exception of fertilizer, soil neutralizers and biostimulant materials should be added to this product.
1. Thermally Processed* (within a pressurized vessel) Virgin Wood Fibers – 80% *Heated to a temperature greater than 380 degrees Fahrenheit (193 degrees Celsius) for 5 minutes at a pressure greater than 50 psi (345 kPa)
2. Wetting agents (including high-viscosity colloidal polysaccharides, cross-linked biopolymers, and water absorbents) – 10%
3. Crimped Biodegradable Interlocking Fibers derived from regenerated plant sources – 5%
4. Micro-Pore Granules – 5%
2.03 PACKAGING
A. Bags: Net Weight – 50 lb (22.7 kg), UV and weather-resistant plastic film Pallets: Weather-proof, stretch-wrapped with UV resistant pallet cover Pallet Quantity: 40 bags/pallet or 1 ton (909 kg)/pallet
2.04 SEED
A. Refer to Plans for seed mix and quantities.
EXECUTION
3.01 SOIL TESTING
A. Soil Samples shall be taken and sent to a third-party, independent lab for analysis and in compliance with Chemical Sampling and Analysis of Soils Sections, if applicable.
B. The tests shall include analysis and interpretation of results.
C. The soil testing methods used shall be compliant with recognized agronomic testing standards, as outlined in specification sections for revegetation of disturbed sites.
D. Soil Analysis shall include results for:
1. Soil pH
2. Soluble Salts
3. Excess Carbonate
4. Organic Matter
5. Nutrient readings for:
i. Nitrogen, Phosphorus, Potassium
ii. Magnesium, Calcium, Sodium, Manganese, Sulfur, Zinc, Copper, Iron, Boron
6. Cation Exchange Capacity
7. Percent Base Saturation Sodium
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February 2026 Hydroseed
31 25 14.13
E. Any soil amendments or soil neutralizers shall be specified according to Section 32 01 90.16 – Amending Soils and applied with the hydroseeding slurry at Manufacturer recommended rates based on soil test results.
3.03 SUBSTRATE AND SEEDBED PREPARATION
A. Examine substrates and conditions where materials will be applied. Apply products to geotechnically stable slopes that have been designed and constructed to divert runoff away from the face of the slope.
Do not proceed with installation until satisfactory conditions are established.
B. Depending upon project sequencing and intended application, prepare seedbed in compliance with other specifications under Section 1.01 B
3.04 INSTALLATION
A. Strictly comply with equipment manufacturer's installation instructions and recommendations. Use approved hydroseeding machines with fan-type nozzle (50-degree tip). To achieve optimum soil surface coverage, apply HP-FGM from opposing directions to soil surface. Rough surfaces (rocky terrain, cat tracked and ripped soils) may require higher application rates to achieve 100% cover. Slope interruption devices or water diversion techniques are recommended when slope lengths (3H:1V) exceed 100 feet (30 m). Slope interruption intervals may need to be decreased based on steeper slopes or other site conditions. HP-FGM is not recommended for channels or areas with concentrated water flow unless used in conjunction with a rolled erosion control product designed to accommodate the anticipated hydraulic conditions. Unless approved by the Manufacturer, no chemical additives with the exception of fertilizer, soil neutralizers and biostimulant materials should be added to this product.
B. For Erosion Control and Revegetation: To ensure proper application rates, measure and stake area. For maximum performance, apply HP-FGM in a two-step process*:
1. Step One: Apply fertilizer with specified prescriptive agronomic formulations and typically 50% of specified seed mix with a small amount of HP-FGM for visual metering. Do not leave seeded surfaces unprotected, especially if precipitation is imminent.
2. Step Two: Mix balance of seed and apply HP-FGM at a rate of 50 lb per 125 gallons (22.7 kg/475 liters) of water over freshly seeded surfaces. Confirm loading rates with equipment manufacturer.
*Depending upon site conditions HP-FGM may be applied in a one-step process where all components may be mixed together in single tank loads. Consult with Manufacturer for further details.
Best results and more rapid curing are achieved at temperatures exceeding 60°F (15°C). Curing times may be accelerated in high temperature, low humidity conditions with product applied on dry soils.
C. Mixing: A mechanically agitated hydroseeding machine is strongly recommended:
1. Fill 1/3 of mechanically agitated hydroseeder with water. Turn pump on for 15 seconds and purge and pre-wet lines. Turn pump off.
2. Turn agitator on and load low density materials first (i.e. seed).
3. Continue slowly filling tank with water while loading fiber matrix into tank.
General Vang Pao Park Section 31 25 14.13
February 2026 Hydroseed
31 25 14.13
4. Consult application and loading charts to determine number of bags to be added for desired area and application rate. Mix at a rate of 50 lb of HP-FGM per 125 gallons (22.7 kg/475 liters).
5. All HP-FGM should be completely loaded before water level reaches 75% of the top of tank.
6. Top off with water and mix until all fiber is fully broken apart and hydrated (minimum of 10 minutes — increase mixing time when applying in cold conditions). This is very important to fully activate the bonding additives and to obtain proper viscosity.
7. Add fertilizer and any other remaining amendments.
8. Shut off recirculation valve to minimize potential for air entrainment within the slurry.
9. Slow down agitator and start applying with a 50-degree fan tip nozzle.
10. Spray in opposing directions for maximum soil coverage.
D. Application Rates: These application rates are for standard conditions. Application rates may need to be increased to accommodate rough surfaces.
Slope Gradient / Condition English SI
< 4H to 1V 2,500 lb/ac 2,800 kg/ha
> 4H to 1V and < 3H to 1V 3,000 lb/ac 3,400 kg/ha
> 3H to 1V and < 2H to 1V 3,500 lb/ac 3,900 kg/h
> 2H to 1V and < 1H to 1V 4,000 lb/ac 4,500 kg/ha
> 1H to 1V 4,500 lb/ac 5,100 kg/ha
Below ECB or TRM 1,500 lb/ac 1,700 kg/ha
As infill for TRM* 3,500 lb/ac 3,900 kg/ha
*Use only approved and tested Turf Reinforcement Mats (TRMs) to infill with the HP-FGM For additional details including mixing ratios/loading rates for specific machine sizes and visual keys for proper application, please consult the Manufacturer’s Application Guide for High Performance – Flexible Growth Medium.
3.05 CLEANING AND PROTECTION
A. Always flush residual slurry from hydraulic seeding/mulching equipment immediately following each application, at the end of each work period or when equipment will be left unattended. Compounds containing residual Urea, Nitrogen, Phosphorus, Potassium and other substances may form and can be hazardous to human health and equipment.
B. Clean spills promptly. Advise owner of methods for protection of treated areas. Do not allow treated areas to be trafficked or subjected to grazing.
3.06 INSPECTION AND MAINTENANCE
A. All inspections and maintenance recommendations shall be conducted by qualified professionals consistent with the owner, engineer/specifier and regulatory entity(s) expectations.
B. Initial inspections shall insure installations are in accordance with the project plans and specifications with material quantities and activities fully documented.
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C. Subsequent inspections shall be conducted at pre-determined time intervals and corrective maintenance activities directed after each significant precipitation or other potentially damaging weather or site event.
END OF SECTION
General Vang Pao Park Section 32 01 90.13
February 2026 Exterior Improvements & Landscape Maintenance
320190.13-1
SECTION 32 01 90.13
EXTERIOR IMPROVEMENTS &
LANDSCAPE MAINTENANCE
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification sections, apply to this section.
1.2 SUMMARY
A. This Section includes requirements for:
1. Watering trees and grass.
2. Monitoring adjustment and minor repair of the landscape irrigation system.
3. Mowing, edging and trimming of lawn areas.
4. Monitoring, fertilizing, weeding, and cultivating the lawn areas.
5. Pruning and trimming of plant material.
6. Weed, cultivating and cleaning of planting beds.
7. Application of fertilizers, insecticides, and herbicides.
8. General site clean-up; removal of trash and products of maintenance.
9. Replacement of trees, shrubs, groundcovers, sod and hydromulch.
10. Sediment removal from irrigation, storm and drainage events.
11. Extra services as needed - see Section 1.4 EXTRA SERVICES of this specification.
B. Related Sections:
1. Section 32 84 00, “Planting Irrigation.”
2. Section 02905, “Landscape Installation”
General Vang Pao Park Section 32 01 90.13
February 2026 Exterior Improvements & Landscape Maintenance
320190.13-2
1.3 DEFINITIONS
A. Backfill: The earth used to replace or the act of replacing earth in an excavation.
B. Finish Grade: Elevation of finished surface of planting soil.
C. Manufactured Topsoil: Soil produced off-site by homogeneously blending mineral soils or sand with stabilized organic soil amendments to produce topsoil or planting soil.
D. Planting Soil: Native or imported topsoil, manufactured topsoil, or surface soil modified to become topsoil; mixed with soil amendments.
E. Subgrade: Surface or elevation of subsoil remaining after completing excavation, or top surface of a fill or backfill, before placing planting soil.
F. Subsoil: All soil beneath the topsoil layer of the soil profile, and typified by the lack of organic matter and soil organisms.
1.4 EXTRA SERVICES
A. All services not covered under this contract shall be considered “extra services” and will be charged for separately according to the nature of the item of work. The consent and authorization of the Owner or their authorized representative must be obtained prior to the performance or installation of such “extra services” items and prior to purchase of any chargeable materials.
B. Plant replacement caused by conditions beyond the contractor’s control. See Section 1.7 NEGLECT AND VANDALISM of this specification.
1.5 MAINTENANCE REQUIREMENTS
A. Maintenance period shall begin upon inspection and approval at Substantial Completion and shall be for ninety (90) days. Maintenance frequency shall be weekly throughout the maintenance period.
B. Irrigation System: Maintenance of the irrigation system shall consist of monitoring and adjustment of the duration and frequency of the watering schedule, adjustment of heads, emitters, and dripline for coverage and elevation, removal of debris from heads and drip filters, repair of leaks in both mains and lateral lines and all other work required to establish a complete working sprinkler irrigation system.
C. Trees, Shrubs, Groundcovers and Vines: Maintenance of new planting shall consist of watering, cultivating, weeding, mulching, re-staking, tightening and repairing of guys, resetting plants to proper grades or upright positions, restoration of the planting basins, and furnishing and applying such sprays and invigorants as are necessary to keep the plants free of insects and disease and in thriving condition.
General Vang Pao Park Section 32 01 90.13
February 2026 Exterior Improvements & Landscape Maintenance
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D. Lawns: Maintenance of new lawns shall consist of mowing, edging, raking, watering, weeding, fertilizing, and repair of all erosion, reseeding and resodding as necessary, to establish a uniform stand of the specified grasses.
1.6 PROTECTION
A. Protect planting areas and lawns at all times against damage of all kinds for duration of maintenance period. Maintenance includes temporary protection fences, barriers, and signs as required for protection. If any plants become damaged or injured, because sufficient protection was not provided, treat or replace as directed by the Owner’s Representative at no additional cost to Owner.
1.7 NEGLECT AND VANDALISM
A. Turf, shrubs, trees or plants that are damaged or killed due to Contractor’s operations, negligence or chemicals shall be replaced at no expense to the Owner. If plant damage or death is caused by conditions beyond the Contractor’s control, replacement shall be at the Owner’s expense.
B. Sprinklers, drip irrigation components or structures that are damaged due to the Contractor’s operations must be replaced by the Contractor promptly. Likewise, damage to the irrigation system by others shall be corrected immediately by the Contractor, at the Owner’s expense.
C. All man-made water damage, resulting from Contractor’s neglect shall be corrected at Contractor’s expense.
D. All damage to or thefts of landscaping and irrigation installations not caused or allowed by the Contractor shall be corrected by the Contractor at the Owner’s expense upon receipt of written authorization to proceed.
1.8 EMERGENCIES
A. Answer emergency or complaint calls regarding conditions in landscaped areas regarding fallen trees or branches or shrubs or trees that obstruct the trail or other pavement within one (1) hour and correct the problem or place warning signs and advise the Owner of the need for major work to be performed withing four (4) hours of the initial contract.
B. Answer emergency calls regarding the landscape irrigation system failure or need of repair.
General Vang Pao Park Section 32 01 90.13
February 2026 Exterior Improvements & Landscape Maintenance
320190.13-4
1.9 FINAL ACCEPTANCE
A. Work under this section will be accepted by Owner’s representative upon satisfactory completion of all work, including maintenance, but exclusive of the required guaranteed irrigation obligations, replacement of plant materials and lawns under the Warranty Period. Upon Final Acceptance, the Owner shall assume responsibility for maintenance of the work.
B. The Contractor shall be responsible to contact the Owner’s Representative ten (10) business days prior to end of 90-Day Maintenance Period to schedule Final Acceptance inspection.
PART 2 - PRODUCTS
2.1 MATERIALS
1. Fertilizers, soil amendments, equipment, or other materials required for installed items shall match those already in use.
2. Sample of all materials not specified under other Sections of these Specifications shall be submitted for review by Owner’s representative prior to use.
PART 3 - EXECUTION
3.1 REQUIRED EQUIPMENT
A. Employ the necessary maintenance equipment.
3.2 WATERING
A. It shall be the responsibility of the Contractor to assure that the correct watering of plant materials is being accomplished during plant establishment period through the following irrigation services:
1. Regular deep watering to all new trees until there are definite signs that the trees have established themselves and new growth is apparent. Deep watering shall be accomplished by automatic controller scheduling, hand watering with hoses or water truck equipment. When hand watering, a water wand shall be used to break the water force.
2. Frequent watering to the lawn areas to insure against drying. This may be accomplished by automatic controller scheduling or hand watering.
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February 2026 Exterior Improvements & Landscape Maintenance
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3.3 LANDSCAPE IRRIGATION SYSTEM
A. Monitor and program the automatic controlling devices to provide optimum moisture levels in all planted areas.
1. Irrigation cycles shall be set to take place prior to sunrise (usually 4:00-5:00 am) unless otherwise instructed by the Owner in writing, except during visits of grounds maintenance personnel; during such visits the irrigation system may be operated as desired by those personnel.
2. If there is more than one irrigation controller, program to water per design parameters found in Contract Documents. During periods of high rainfall, set rain sensors to turn off irrigation programs until irrigation is needed. Do not switch controller to “off”, as this will stop the controller.
3. Complete irrigation system servicing shall be performed as required to maintain irrigation in correct operating condition, including all required labor. Operation of irrigation systems shall be monitored on a monthly basis to assure proper coverage and operation. Contractor shall provide a written report to Owner within five (5) business days after each monitoring service is complete including observation of performance, modifications to schedules, repairs and adjustments.
4. Adjust irrigation to avoid water damage to windows, buildings, fences, and walls.
Make repairs and alterations to the irrigation system and water lines as needed.
All irrigation repairs such as cleaning heads and filters or breaks caused by the Contractor shall be the Contractor’s responsibility.
5. Perform minor additions, subtractions and/or adjustments to irrigation equipment (i.e., addition of sprinkler heads or emitters, riser extensions, etc.) as may be required in order to conform to the irrigation requirements herein specified. Such additions, subtractions and/or realignments to irrigation system equipment shall not materially reduce the extent or value of the irrigation system equipment, and shall be accomplished after securing approval of the Owner.
6. Supplemental irrigation beyond tat which can be provided by the irrigation system shall be provided by the grounds maintenance firm as required in order to assure optimum moisture levels.
7. Sediment removal from project site as a result of erosion due to over irrigation or broken pipes.
3.4 MAINTENANCE OF TURF AREAS
A. Mowing lawn/grass areas shall be accomplished with sharp, properly adjusted mowers of the correct size for the various areas.
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B. Mowing frequency shall be as per the Maintenance Frequency Schedule per Section 3.6 MAINTENANCE FREQUENCY SCHEDULE of this specification.
C. Blade heights shall be set according to the following schedule: two (2) inches – initial mowing and two and one half (2-1/2) inches April – November.
D. In the event of a prolonged rainy period and a surge in leaf growth is anticipated, the mower height may be re-adjusted to prevent “scalping” or “skinning” of lawn on preceding cuts.
E. Lawn shall be edged evenly at all walks, headers and other structures as per Maintenance Frequency Schedule per Section 3.6 MAINTENANCE FREQUENCY SCHEDULE of this specification.
F. After seed germinates or after sod is established, approximately four (4) to six (6) weeks after installation, apply a high-quality turf fertilizer that is predominately nitrogen to the lawn areas.
G. Until the establishment of the turf, the Contractor will be responsible for replacing soils that have eroded onto the paved areas. Residual soils on paving will be removed and if not mingled with objectional materials, may be re-used in eroded areas.
H. Immediately upon observing any lawn grass spreading into shrub or groundcover areas, the Contractor shall initiate a program of mechanical removal and maintain this program throughout the maintenance period.
I. Any lawn grass appearing in paved areas shall receive an application of soil sterilant according to manufacturer’s direction. The sterilant shall be approved and will not be detrimental structurally to paved areas.
J. Removal of debris from the site unrelated to horticultural maintenance (paper, bottles, cans, etc.) shall be the responsibility of the maintenance Contractor and limited to areas designated by the project’s limit of work. Exceptions for debris removal shall be per written direction of Owner.
3.5 MAINTENANCE OF TREES, SHRUBS AND GROUNDCOVERS
A. Contractor shall adjust and tighten as required all tree staking and guying to maintain support and prevent bark wounds due to rubbing. Guying shall remain in place through the one (1) year guarantee period. Removal as directed by Owner’s Representative.
B. Contractor shall deep water all new trees until there are definite signs the trees have established themselves and are pushing out new growth.
C. Watering basins shall be removed by contractor after the trees have established themselves or as directed by Owner’s Representative. Basins are normally removed one year from time of planting.
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February 2026 Exterior Improvements & Landscape Maintenance
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D. Contractor shall perform pruning work in accordance with standard horticultural pruning practices. Remove from the project all pruned branches and material. Remove and replace plant material excessively pruned or malformed resulting from improper pruning practices at no additional cost to the Owner.
1. Prune trees to select and develop permanent scaffold branches; to eliminate narrow V-shaped branch forks that lack strength, to reduce toppling and wind damage by thinning out crowns, to maintain a natural appearance and to balance crown with roots. Prune only as directed by the Owner’s Representative.
2. Prune shrubs to develop natural form of plant. Shrubs shall not be clipped into balled boxed forms unless such is specified by the Contract Documents. Pruning cuts shall be made to lateral branches, buds or flush with the trunk. “Stubbing” and “heading” shall not be permitted.
E. Contractor shall be continuously alert for signs of insect presence or damage or the presence or damage from plant fungi. Upon locating such evidence, the Contractor shall report it to the Owner’s Representative and take action as directed.
3.6 MAINTENANCE FREQUENCY SCHEDULE
A. Mowing, edging, trimming, litter clean-up, weeding, and watering monitoring: four visits per month for ninety (90) days.
B. Top-dress fertilizer: thirty (30) days after seeding and/or sodding.
C. Mulching, weeding, weed control and guying adjustment: as required each visit.
D. Reseeding: as required upon notice.
E. Tree and plant replacement: as required each visit.
F. Trash and debris removal: collect all trash and debris at each visit and dispose of offsite.
END OF SECTION 320090.13
321216 - 1
General Vang Pao Park Section 321216
February 2026 Asphalt Paving and Base
SECTION 321216
ASPHALT PAVING AND BASE
PART 1 - GENERAL
1.1 SECTION INCLUDES
A. Provide, spread, and compact aggregate base as shown on the Contract Documents and as specified herein.
B. Provide, spread, and compact asphaltic concrete pavement.
C. Adjust to finish grade: any, and all, new or existing utility cleanouts, drainage structures, valve boxes, etc., which are included in the limits of work.
1.2 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including the Division 01 Specification Sections apply to this Section.
B. Related Sections includes, but are not limited to the following:
1. Earthwork - Section 312000
2. Trenching, Backfilling and Compaction - Section 312316
3. Concrete Sidewalk and Curbs - Section 321600
1.3 REFERENCES
A. Reference Data:
1. If the year of the adoption or latest revision is omitted from the designation, it shall mean the specification, manual or test designation in effect the date the Notice to Proceed with the Work is given.
B. Caltrans Standard Specifications.
1.4 QUALITY ASSURANCE
A. Testing and inspection of the aggregate base, aggregate subbase and asphaltic concrete shall be done by a testing laboratory retained and paid for by the Owner.
Any areas receiving failing tests shall be reworked by the Contractor to achieve the minimum specified degree of compaction. It shall be the sole responsibility of the Contractor to achieve satisfactory results.
B. Test Methods: Unless otherwise indicated, tests shall be made in conformance with the following standard methods:
1. Relative compaction shall be determined by Test Method No. California 216 and 231.
2. Caltrans Standards and Specifications, most recent edition.
1.5 SUBMITTALS
A. Submit certificate of compliance for aggregate base.
B. Submit gradation and strength analysis of any recycled Class 2 aggregate base.
C. Submit asphalt mix design parameters and certificates of compliance.
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General Vang Pao Park Section 321216
February 2026 Asphalt Paving and Base
D. Submittals shall conform to the requirements of Section 01300.
PART 2 - PRODUCTS
2.1 AGGREGATE BASE
A. Aggregate for aggregate bases shall be clean and free of vegetable matter and other deleterious substances.
B. Aggregate base shall be of such a nature that it can be compacted readily under watering and rolling to form a firm, stable base.
C. Aggregate base shall be Class 2, and the combined aggregate shall conform to the 3/4 inch maximum grading specified in Section 26-1.02A "Class 2 Aggregate Base" of the Caltrans Standard Specifications.
D. Recycled Class 2 Aggregate base materials meeting the gradation and strength requirements of virgin material is acceptable for use in hardscape areas only (nonbuilding areas).
2.2 ASPHALT CONCRETE
A. The asphalt concrete areas shall be Type A, ½ inch and shall conform to the applicable portions of Section 39 of the Caltrans Standard Specifications.
PART 3 - Execution
3.1 SUBGRADE PREPARATION FOR BASE MATERIAL
A. Subgrade preparation shall conform to the requirements in Section 312000 - Earthwork, and shall not vary more than 0.05 foot above, or 0.05 foot below the grade established by the Plans.
B. Prepared subgrade shall be inspected by the independent testing laboratory retained by the District prior to the placement of any aggregate base.
C. As per Section 312000 - Earthwork.
3.2 SPREADING
A. Aggregate base shall be delivered to the roadbed as uniform mixtures and shall be graded in layers or windrows. Segregation shall be avoided and the base/subbase shall be free from pockets of coarse or fine material.
B. The aggregate base, after spreading as above specified, shall be shaped to such thickness that after watering and compacting the completed base will conform to the required grade and cross section, within the tolerances specified in Section 26-1.05 "Compacting" of the Caltrans Specifications.
C. The base shall be spread, watered and compacted in layers not to exceed 6 inches in compacted thickness to achieve the specified thickness.
3.3 COMPACTION AND TOLERANCE
A. The relative compaction of the base shall not be less than 95 percent.
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General Vang Pao Park Section 321216
February 2026 Asphalt Paving and Base
B. The finished surface of the aggregate base shall not vary more than 0.05 foot from the design grades.
C. Aggregate base which fails to meet the specified tolerances shall be reshaped, dewatered, and recompacted at the Contractor's expense.
3.4 SUBGRADE PREPARATION FOR ASPHALT CONCRETE
A. All construction beneath the subgrade shall be completed, including pipeline testing, prior to asphalt
concrete placement.
B. Subgrade shall not vary more than 0.05 foot above or below design grade.
C. Any soft spots in the subgrade shall be repaired by the Contractor, regardless of cause, prior to paving.
D. Minimum Class 2 aggregate base material under private walkways as shown on the Drawings shall be 6” in compacted thickness, unless otherwise noted.
3.5 TACK COAT
A. Apply tack coat of RS-1 or CRS1 Emulsion to vertical surfaces of existing surfacing that will come into con- tact with asphalt concrete.
3.6 SPREADING AND COMPACTING ASPHALT CONCRETE
A. Shall be in accordance with Section 39 of the Caltrans Standard Specifications.
3.7 STRUCTURE ADJUSTMENT
A. The Contractor shall mark the location of all structures to be adjusted to grade and shall be responsible for their location after paving operations are completed.
B. After surfacing or resurfacing is completed, the Contractor shall construct or reconstruct the structures to grade as shown on the plans.
3.8 FLOW TEST
A. Finished pavement areas shall be flow tested in the presence of the Inspector of record to confirm that positive gradients, that facilitate proper and complete surface drainage, have been achieved in all paved areas.
B. Any areas that fail the flow test, defined as any area where depth of ponding water exceeds 1/8 inch or where the surface of a ponding area exceeds 10 square feet, shall be repaved to achieve positive drainage.
3.9 CLEAN UP
A. Remove all debris and stains resulting from the work of this section.
END OF SECTION
321223 - 1
General Vang Pao Park Section 321223
February 2026 Pavement Markings and Signs
SECTION 321223
PAVEMENT MARKINGS AND SIGNS
PART 1 - GENERAL
1.1 Section Includes
A. Furnish materials and install painted parking stalls, pavement markings, crosswalk striping.
B. Furnish and paint curbs.
C. Furnish materials and install signs and posts.
1.2 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.
B. Related Sections include the following:
1. Asphalt Concrete Paving and Base – Section 321216
2. Concrete Sidewalk and Curbs – Section 321600
1.3 SUBMITTALS
A. In accordance with Section 01300, Administrative Requirements:
1. Paint product data.
2. Sign product data.
1.4 REFERENCES
A. California Manual of Uniform Traffic Control Devices (MUTCD), latest edition.
B. California Code of Regulations, Title 24, Part 2 – California Building Code (CBC), latest edition.
C. American with Disabilities Act (ADA), latest edition.
D. California Standard Specifications Section 82 Signs and Markers, latest edition.
PART 2 - PRODUCTS
2.1 STRIPING PAINT
A. The paint to be used on striping shall be commercial quality thermoplastic paint and be applied in two coats to achieve the designed coverage. Thinner shall not be mixed with paint.
B. White paint shall be used on all parking stall, pavement markings and crosswalk striping.
C. Blue paint shall be used on ADA parking stalls where indicated on the details.
D. Red paint shall be used on curbs where indicated on the drawings.
E. Refer to Architectural drawings for color(s) of playground striping.
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General Vang Pao Park Section 321223
February 2026 Pavement Markings and Signs
2.2 SIGNS
A. Accessible signs shall also comply with the applicable sections of California Title 24 regulations and the ADA.
B. Signs shall be mounted at standard heights on 2” diameter steel posts set in concrete as detailed on the plans. Signs in drivable areas shall be mounted with breakaway hardware.
PART 3 - EXECUTION
3.1 STRIPING
A. No striping shall be started until all paving work on the entire job has been completed, and the various finished surfaces are sufficiently cured to prevent undue tracking onto new striping.
B. All stripes for parking spaces shall have a width of four inches. All widths shall be within 1/4-inch of the specified widths.
C. All lines and other shapes shall be clean and sharp as to dimensions and shall be painted in the locations shows on the plans. Ragged ends of segments, fogginess along the sides, or objectionable dribbling along the unpainted portions of the stripe shall not be permitted.
D. The finished product shall have an opaque, well painted appearance with no black or other discolorations showing through. Any smears shall be painted out with black paint to the satisfaction of the Owner's Representative.
E. The Contractor shall take all reasonable precautions to protect the paint during drying time and may be required to paint out all objectionable tracking. Appropriate traffic control necessary to insure non-tracking as well as reasonable traffic flows shall be the Contractor’s responsibility.
F. Painted stripes shall receive two coats of paint to achieve the desired coverage.
G. No work shall be done when the pavement is appreciably damp.
3.2 SIGNS
A. Signs shall be installed in the locations shown on the plans and in accordance with the referenced standards for height, setbacks, and embedment.
B. Signs for disabled accessibility shall be installed in accordance with the requirements of the California Building Code.
3.3 CLEAN UP
A. Remove all debris and stains resulting from the work of this section.
END OF SECTION
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General Vang Pao Park Section 321541.10
February 2026 Permeable Decomposed Granite Paving
SECTION 321541.10
PERMEABLE DECOMPOSED GRANITE PAVING
PART 1 - GENERAL
1.1 SUMMARY
Section includes:
Permeable Decomposed Granite (DG) Paving
Drawings and general provisions of Contract, including General and Supplementary Conditions and Division 1 Specification sections, apply to Work of this Section.
Work included: All service, labor, materials, transportation and equipment necessary to perform the Work indicated on the Drawings and as specified.
1.2 SYSTEM DESCRIPTION
Decomposed Granite paving locations are per plan.
Compacted base depth to be per geotechnical recommendation, unless otherwise indicated. Geotechnical report with recommendation to be procured and provided by Contractor.
1.3 SUBMITTALS
Comply with specified Administrative Requirements, unless otherwise indicated.
Submit product data and manufacturer’s instructions for:
1. Decomposed granite
2. Metal header
3. Geotextile fabric
Samples:
Contractor shall provide a material sample consisting of 1/2 pint container of decomposed granite (DG) to the Owner’s representative for approval prior to
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installation.
1.4 QUALITY ASSURANCE/FIELD QUALITY CONTROL
Installer qualifications: Installer to provide evidence to indicate successful commercial installations of decomposed granite surfacing, contact manufacturer for certified installers. If product is installed by a non-certified installer, Contractor to coordinate review of installation process by Owner’s Representative. Failure to coordinate this oversight will void the manufacturer warranty. If the warranty is voided by the manufacturer due to lack of Contractor coordination, the Contractor will repair or replace unsatisfactory product at his or her own expense.
1.5 MOCK UP
Construct a 2 SF mock-up of the aggregate paving, including edging material and base course, at an owner-approved location, 5 days prior to installation. If approved, this mock-up will be the basis to demonstrate color, texture and standard of workmanship for the remainder of the project.
Notify the Owner’s Representative 3 days prior to placing mock up.
Obtain approval of the mock-up prior to completing aggregate paving, the mockup may remain as part of the project.
1.6 GENERAL REQUIREMENTS
Contractor shall be responsible for damages caused by his operations.
Metal Header and geotextile fabric shall be in place before installation of DG.
Scaled dimensions are approximate. Before proceeding with any work, the Contractor shall carefully check and verify all dimensions.
Contractor shall acquaint himself with all site conditions prior to submitting bid proposal.
1.7 DELIVERY, STORAGE, AND HANDLING
Packing and Shipping: Deliver products in original unopened packaging
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with legible manufacturer’s identification.
Storage and Protection: Comply with manufacturer's recommendations.
Store in a cool, dry place out of direct sunlight.
Protect from damage by the elements and construction procedures.
Store at temperature above 40 degrees F.
1.8 FIELD CONDITIONS
Do not install crushed aggregate when sub-base is wet at saturated field capacity.
Do not install crushed aggregate materials during rainy conditions or below 40 degrees Fahrenheit.
1.9 MAINTENANCE
The Maintenance Period begins on the day the Owner’s Representative has given notice of substantial completion and shall continue thereafter for no less than ninety (90) continuous calendar days
The Contractor shall continuously maintain and repair all involved areas of the Contract during the progress of the work an during the Maintenance Period until the Final Acceptance of the work.
The Contract completion date of the Maintenance Period will be extended, when in the opinion of the Owner’s Representative, improper maintenance is evident at the termination of the scheduled Maintenance Period. The Contractor shall be responsible for additional maintenance of the work at no charge in Contract price until all of the work is completed and acceptable.
The contractor shall be responsible for maintaining adequate protection of the areas.
Damaged areas shall be repaired immediately at the Contractor's expense.
The Contractor shall physically remove any and all weed growth and roots from Decomposed Granite areas.
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1.10 WARRANTY
Contractor shall provide warranty for performance of product. Contractor shall warranty installation of product for the time of one year from completion.
PART 2 - PRODUCTS
2.1 MATERIALS
Decomposed granite:
Description: Shall be 3/8-inch maximum gradation, produced from naturally friable rock/granite with enough fines to produce a smooth walking surface.
Materials should be free from clay lumps, organic matter and deleterious material. Blends of coarse sand and rock duct are not acceptable. Color to be natural sand/golden.
Use a single supply source for the entire quantity required.
Gradation:
Sieve Sizes % Passing
3/8” 100
#4 85-100
#8 70-80
#16 50-65
#30 40-50
#50 25-35
#100 15-25
#200 10-15
Metal header:
Description: 3/16” thick by 5” deep heavy-duty steel edging with (7) 16-inch long stakes per 16’ section.
Product: DURAEDGE, or approved equal
Manufacturer: J.D. Russell Company (1-800-888-7425,
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February 2026 Permeable Decomposed Granite Paving
www.jdrussellco.com), or approved equal. Available from Wyatt Irrigation Supply 707-578-3747 or John Deere Landscape 707-526-1171.
Color: Black, Powder Coat
Landscape Fabric:
Description: Product: Non-woven landscape fabric with 3 oz/sy minimum weight.
Product: 140 N (135 gal/ min flow rate)
Manufacturer: Mirafi or approved equal. Contact Eric Gibson at 310-903-2120.
Aggregate Base
Class II Permeable Base Rock, see aggregate base specification
EXCESS MATERIAL
Provide Owner with excess materials for use in future maintenanceprovide at minimum 1/2 yard of aggregate in 50 lb sacks.
PART 3 - EXECUTION
3.1 EXAMINATION
Verification of Conditions: Examine areas and conditions under which Work is to be performed and identify conditions detrimental to proper or timely completion.
Do not proceed until unsatisfactory conditions have been corrected.
3.2 INSTALLATION
Comply with manufacturer's recommendations for product installation.
Layout stabilized decomposed granite paved areas (DG) per Drawings. Owner’s Representative to approve layout prior to excavation.
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Do not proceed with installation of DG until all walls, curbs, headers, and paving and utility work in the area has been installed.
Excavate and compact the subgrade to depths, slopes and widths as shown on the Drawings. Do not over- excavate compacted subgrades of adjacent pavement or structures.
Confirm that the subgrade is at the proper elevation and compacted as required.
Subgrade elevations slope parallel to the finished grade and/or as shown on the Drawings to provide positive drainage.
Set metal landscape edging per drawings and in accordance with manufacturer’s specifications. Headers shall be set and staked to provide tight, clean lines, both vertically and horizontally. Set top of steel edging to provide positive drainage.
Install geotextile fabric per drawings and in accordance with manufacturer’s specifications.
Place the stabilized decomposed granite on prepared sub-grade. Level to grade and cross section per plans.
Water per manufacturer’s recommendations.
Compact per manufacturer recommendations. Do not use a vibratory plate. Roll and compact within 3 to 48 hours after placement. Product can be compacted up to 48 hours after placement.
Upon final compaction – finished surface of walkway shall be smooth, uniform, and solid. There shall be no evidence of chipping or cracking. Cured and compacted pathway shall be form throughout profile with no spongy areas.
Loose material will not be present on the surface after installation but may appear after use and according to environmental conditions. Pathway should remain stable underneath the loose granite on top. It is a natural looking pathway, yet stable throughout. Any significant irregularities in path surface shall be repaired to the uniformity of entire installation.
Completed finished surface shall be consistent quality and free of deleterious materials such as organic materials, stones and loose material. Surface shall not have depressions or humps greater than 1/4" in ten feet.
Protect adjacent walls, walks and utilities from damage or staining by DG. Any
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damage to paving or architectural work caused by DG installation shall be repaired by the Contractor at the Contractor’s expense.
3.3 OBSERVATION SCHEDULE
The Contractor shall be responsible for notifying Owner’s Representative 72 hours (3 working days) in advance for the following observations:
Layout of areas to receive DG.
Preparation of subgrade, prior to placing geotextile fabric Upon final compaction
3.4 CLEAN-UP
As project progresses, Contractor shall maintain all areas in a neat manner and remove unsightly debris as necessary. After completion of project, Contractor shall remove all debris and containers used in accomplishing work, and clear paving and planting areas of DG.
END OF SECTION
321600 - 1
General Vang Pao Park Section 321600
February 2026 Concrete Sidewalks and Curbs
SECTION 321600
CONCRETE SIDEWALKS AND CURBS
PART 1 - GENERAL
1.1 SECTION INCLUDES
A. Construct concrete curbs and sidewalks.
B. Provide mockup of exterior concrete walk finish.
1.2 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including the Division 01 Specification Sections apply to this Section.
B. Related Sections include, but are not limited to, the following:
1. Concrete – Section 030000
2. Cast-in-Place Concrete – Section 033000
3. Earthwork – Section 312000
4. Asphalt Paving and Base – Section 321216
1.3 REFERENCES
A. Reference Data:
1. If the year of the adoption or latest revision is omitted from the designation, it shall mean the specification, manual or test designation in effect the date the Notice to Proceed with the Work is given.
B. Caltrans Standard Specifications, Sections 73 (Concrete Curbs and Sidewalks) and 90 (Concrete).
C. City of Merced Standard Designs.
1.4 SUBMITTALS
A. Submit concrete mix design to Engineer for review at least 21 days prior to concrete.
B. Submit mockup of exterior concrete walk finish, including, but not limited to score pattern, color and texture to Architect for review prior to any concrete installation.
PART 2 - PRODUCTS
2.1 CONCRETE
A. Concrete shall comply with the applicable provisions of Section 90 "Concrete" of the Caltrans Standard Specifications for Section 90-2. “Minor Concrete” and meet the following requirements listed below.
1. Concrete shall have a minimum 28-day compressive strength of 3,000 psi.
2. Concrete shall have a maximum slump of 4 inches.
3. Concrete must contain at least 505 pounds of cementitious material per cubic yard.
4. Cementitious material must be Type II or V Portland cement or a combination of Type II or V Portland cement and other approved Supplementary Cementitious Materials (SCM’s). Typical SCM’s are ground granulated blast furnace slag, fly ash, silica flume, rice hull ash and natural pozzolans such as calcined shale,
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February 2026 Concrete Sidewalks and Curbs
calcined clay and metakaolin. The amount of SCM’s in the concrete mix shall not exceed the requirements listed in section 90-1.02B of the Caltrans Standard Specifications.
5. The quantity of free water must not exceed 310 pounds per cubic yard of concrete plus 20 pounds of free water for each required 100 pounds of cementitious material in excess of 550 pounds of cementitious material per cubic yard of concrete.
6. The maximum coarse aggregate size must not be larger than 1-1/2” or smaller than ¾” and meet the gradation requirements in section 90-1.02C(4)(b).
7. Fine Aggregate grading shall meet the gradation requirements in section 90-
1.02C(4)(c).
8. Acceptable admixtures shall conform to Section 90-1.02E. Chemical admixtures must comply with ASTM C 494, Air-entraining admixtures must comply with ASTM C 260.
PART 3 - EXECUTION
3.1 GENERAL
A. Curbs and walkways shall conform to the details shown on the plans.
B. Provide representative mockup of sidewalk including, but not limited to score pattern, color and finish for review and approval by Architect prior to construction.
C. Concrete finishes along accessible routes of travel shall be at least as slip-resistant as that described as a medium salted finish for slopes of less than 6%, and slip-resistant at slopes of 6% or greater.
D. Concrete finishes in non-accessible path of travel areas should be a medium broom finish.
3.2 SUBGRADE PREPARATION
A. As per Section 312000, Earthwork.
B. Minimum Class 2 aggregate base material under sidewalks as shown on the Drawings shall be at least 6 inches in compacted thickness, or otherwise noted.
C. Subgrade and forms shall be wet immediately before concrete placement.
D. Reinforcement shall be carefully placed and supported.
E. Steel dowels, reinforcement steel and welded wire reinforcement must comply with Section 52 “Reinforcement” of the California Standard Specifications
F. Apply soil sterilizer 6” each side of the edges of sidewalks/walkways to prevent growth of vegetation under sidewalks/walkways.
G. Excavate for thickened edges where they occur.
3.3 EXISTING CURBS, GUTTERS AND WALKWALKS
A. Joint shall be cut to a minimum depth of 1-1/2 inches with an abrasive type saw.
B. Joint shall be at first scoring line at or beyond the planned joint location.
3.4 FORMS
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General Vang Pao Park Section 321600
February 2026 Concrete Sidewalks and Curbs
A. Smooth face against concrete, true smooth upper edge, and rigid enough to withstand pressure of fresh concrete without distortion.
B. Clean and oil coated.
C. Carefully set to alignment, grade and required dimensions.
D. Adequately secured from movement by stakes, clamps, spreaders, and braces.
3.5 CURB AND WALKWAY CONSTRUCTION
A. Dimensions as shown on Drawings.
B. Weakened plane joints shall be constructed at intervals not exceeding 10 feet.
C. Expansion joints, 1/2-inch-wide, shall be installed where the new walkway joins existing curbs, drainage structures, and other fixed objects and at intervals not exceeding 60’.
D. Expansion joints shall contain 1/2-inch thick pre-molded joint fillers the full thickness of concrete. Preformed expansion joint filler must comply with ASTM D 1751. Once concrete has cured, expansion joints shall be caulked.
E. The top and face of curbs, and non-decorative sidewalks, shall be finished with a steel trowel and be given a final fine brush finish.
F. The top and face of curb shall be true and straight and not vary more than 0.01 foot above or below the staked grade.
G. Concrete curing shall be as provided in Section 90-1.03B of the California Standard Specifications.
H. Repairs shall be made by removing and replacing the entire unit between scoring lines or joints.
3.6 ADJUST UTILITY BOXES
A. The Contractor shall adjust all existing and new utility boxes, and any other service castings falling within the limits of work to exact grade at the same time the concrete improvements are being constructed and shall maintain these appurtenances to true and exact grade until concrete is thoroughly set.
3.7 CURING
A. Moist Curing: Cover with reinforced waterproof curing paper. Seal all joints and weights down edges. Maintain moist for 14 days.
B. Liquid Curing Compound: Locations as approved by Architect. Apply a uniform coating within two hours of final troweling.
3.8 REPAIRS AND PROTECTIONS
A. Repair or replace broken or defective concrete as directed by Architect.
B. Protect concrete from damage until acceptance of work. Exclude traffic from pavement for at least 14 days after placement. When construction traffic is permitted, maintain pavement as clean as possible by removing surface stains and spillage of materials as they occur.
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February 2026 Concrete Sidewalks and Curbs
3.9 CLEAN UP
A. Remove all debris and stains resulting from the work of this section.
END OF SECTION
1 General Vang Pao Park Section 32 18 16.13
February 2026 Playground Resilient Surfacing
32 18 16.13 -
SECTION 321816.13
PLAYGROUND RESILIENT SURFACING
PART 1 - GENERAL
1.01 WORK SCOPE
A. Furnish labor, material, and equipment necessary to install the poured-in-place, resilient surfacing system as shown on the drawings and specified herein. a. Work shall include but not be limited to the following: layout; excavation; backfill; furnishing and installing of base material; furnishing and installing of poured-inplace, resilient surfacing and all other incidental work to provide a complete resilient surfacing system.
b. Poured in place playground surfacing shall consist of a polyurethane binder mixed with recycled rubber, which will make up the attenuation cushion layer. The attenuation cushion layer is capped with TPV granules, mixed with a polyurethane binder creating the Wear Course.
c. Surfaces shall comply with ADA and CPSC guidelines as well as ASTM Standards. Manufacturers are to be certified by IPEMA, a third-party testing organization for playground surfaces and equipment.
1.02 PERFORMANCE REQUIREMENTS
A. Area Safety: Poured in place within playground use zones shall meet or exceed the performance requirements of the CPSC, ADA and Fall Height Test ASTM F1292-18.
The surface must yield both a peak deceleration of no more than 200 G-max and a Head Injury Criteria (HIC) value of no more than 1,000 for a head-first fall from the highest accessible portion of play equipment being installed as shown on drawings.
IPEMA certification is required. (ASTM F1292-18, section 15 The laboratory test used to determine critical fall height shall have been conducted on surfacing material samples identical in design, materials, components, and thickness and manufactured as the installed playground surface).
B. Accessibility: NOTE: Children’s outdoor play areas shall be in compliance with the Uniform Federal Accessibility Standards (UFAS) FED-STD-795 and the Architectural and Engineer Instructions (9AEI) Design Criteria.
C. The requirements of the Americans with Disabilities Act. Accessibility Guidelines (ADAAG) 28 CFR Part 36 that provide equal or greater accessibility than the requirements of UFAS must also be met in children’s outdoor play areas.
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D. Poured in place surfaces intended to serve as accessible paths of travel for persons with disabilities shall be firm, stable and slip resistant, and shall meet the requirements of ASTM F 1951-14 and ASTM F1292-18.
1.03 APPLICABLE STANDARDS
A. ASTM International
B. ASTM D2047 - Standard test method for determining the static coefficient of friction of ceramic tile and other like surfaces by the horizontal dynamometer pull meter method.
This standard replaces ASTM C1028.
C. ASTM D412 – Standard test methods for vulcanized rubber and thermoplastic rubbers and thermoplastic elastomers-tension.
D. ASTM D624 - Standard test method for tear strength of conventional vulcanized rubber and thermoplastic elastomers.
E. ASTM D2859 – Standard test method for flammability of finished textile floor covering materials.
F. ASTM E303 – Standard test method for measuring surfacing frictional properties using the British Pendulum tester.
G. ASTM F1292-18 – Standard specification for impact attenuation of surface systems under and around playground equipment.
H. ASTM F1951 – Standard specification for determination of accessibility of surface systems under and around playground equipment.
I. Poured in place surfaces shall be manufactured and installed by trained, experienced company employees or National Playground Safety Institute (NPSI) certified.
1.04 SUBMITTALS: THE FOLLOWING SHALL BE SUBMITTED
A. The Contractor shall submit a complete set of the material submittals, as required, including manufacturer’s name and address, specific trade names, catalog and model numbers, illustrations and descriptive material, and samples of the proposed material for this project clearly marked as to proposed items for approval by the Owner’s representative.
B. Products submitted as equal must include hard copies of manufactures written specifications, warranty, purchase and use of materials.
C. Manufacturer’s descriptive data and installation instructions.
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D. Manufacturer’s details showing depths of wear course and sub-base materials, anchoring systems and edge details.
E. Upon request, a listing of at least five installations where products similar to these proposed for use have been installed and have been in service for a minimum period of three years. The list shall include owner or purchaser, address of installation, date of installation, contact person, and phone number.
F. A signed statement by an authorized official certifying that the surfacing system meets the requirements of ASTM F1292-18, section 15 for a head-first fall from the highest accessible portion of the specified playground equipment.
G. A signed statement from the manufacturer of the poured in place surfacing attesting that all materials under this section shall be installed only by the Manufacturer’s Trained Installers.
H. A Certificate of Insurance shall be provided by the Manufacturer for poured in place surfacing for use as playground safety surfacing, covering general and product liability, of not less than $1,000,000 for each occurrence, $2,000,000 general aggregate, with an excess/umbrella liability of $25,000,000. The issuing underwriter shall be AA rated.
I. IPEMA Certification mandatory
1.05 Delivery, Storage and Handling: Materials and equipment shall be delivered and stored in accordance with the manufacturer’s recommendations.
1.06 Project Site Conditions: Poured in Place surfacing must be installed on a dry subsurface, with no prospect of rain within the initial drying period, and within the recommended temperature range of the manufacturer. Installation in weather conditions of extreme heat, cold (less than 55°F), and/or high humidity may affect cure time, and the structural integrity of the final product. Immediate surrounding sites must be reasonably free of dust conditions, or this could affect the final surface look.
1.07 Sequencing and Scheduling: Poured in Place surfacing shall be installed after all playground equipment, shade structures, signs and any other items that will be within the surface area. Coordinate with General Contractor.
1.08 Surface installation coordinated by manufacturer representative.
1.10 Warranty: Poured in Place surface shall maintain required impact attenuation characteristics and be guaranteed against defects in workmanship AND material for a limited seven-year period or as specified and agreed upon per alternate contract.
Warranty will be specific to maintenance requirements and performance standards of completed product. Warranty is void if not installed by Manufacturers Trained and Certified Poured in Place Surfacing Installers.
1.11 Testing: NOTE: Critical Fall Height Four feet through 10 feet have been tested in
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accordance with Section 15 – Critical Fall Height Test Procedure of ASTM F1292-18.
PART 2 – PRODUCTS
2.01 Safety surfacing shall consist of both recycled and synthetic materials meeting the requirements of this specification. The type of safety surfacing shall be Robertson Industries Inc., manufactured and installed by Robertson Industries Inc., or it’s Certified Installers. Telephone: (800) 858-0519.
2.02 PRODUCT SCOPE
A. Poured in Place Surface: The poured in place surface shall consist of recycled rubber mixed with a polyurethane binder, then capped with .5-1.5mm TPV granules mixed with an aliphatic binder.
B. It shall consist of a uniform material manufactured in such a way that the top portion meets the requirements specified herein for wear surface.
C. The type of safety surfacing shall be a poured-in-place system and shall be indicated on the drawings.
2.03 ATTENUATION CUSHION LAYER SECTION
A. Impact attenuation cushion layer consists of these materials; recycled styrene butadiene rubber (SBR) and/or cryogenic crumb rubber and/or pre consumer postindustrial reclaimed scrap rubber adhered with a 100% solids polyurethane binder to form a resilient porous material.
B. Strands of SBR may vary from 0.5 mm – 2.0 mm in thickness by 3.0 mm – 20 mm in length.
C. Chunk Premium Black Rubber Granules are 5/8” granules: This rubber is preconsumer, post-industrial, reclaimed rubber, granulated through a 5/8” screen and contains less than 2% dust.
D. SBR Crumb Rubber (5-9 Mesh) using sieve analysis ASTM D5644 with a fiber content of .1% or less mixed in.
E. Binder shall be between 7-12% of the total weight of the material and shall provide 100 % coating of the particles.
F. The attenuation cushion layer shall be compatible with the wear course and must meet requirements herein for impact attenuation.
2.04 WEAR COURSE
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A. Wear course shall consist of .5-1.5mm Thermal Plastic Vulcanized (TPV) granules with polyurethane binder formulated to produce an even, uniform, seamless surface.
Installation of surfacing shall be seamless (unless otherwise agreed upon by owner).
B. TPV shall be peroxide cured with an TPV content of 26% and shall include a processing aid to prevent hardness with 26% poly content to maintain dynamic testing characteristics, weatherization and UV stability.
C. ASTM D2240 (Shore A) hardness of 55-65, not less than 26 percent rubber hydrocarbons.
D. Size of TPV granules .5-1.5mm across. Binder shall be not less than 20% of total weight of rubber used in the wear surface and shall provide 100% coating of the particles.
E. Thickness of wear course shall be a minimum .5” (12.7 mm).
F. The wear course shall be porous.
2.05 BINDER
A. No Toluene Diphenyl Isocyanate (TDI) shall be used.
B. No filler materials shall be used in urethane such as plasticizers and the catalyzing agent shall contain no heavy metals.
C. Weight of polyurethane shall be no less than 8.5 lbs. /gal (1.02 Kg/1) and no more than
9.5 lbs. /gal (1.14 Kg/1).
D. Manufacturer is permitted to modify the type of urethane required to match extreme weather conditions. Substitutions must be equal to or exceed original quality.
2.06 MATERIALS
A. Wear Course: TPV Granules
B. Attenuation cushion layer Shredded and/or Chunk Rubber C. Binder: Aliphatic Urethane Premium, Non-Ambering
Manufacturer: Accella Polyurethane Systems
D. Chunk Premium Black Rubber Granules
PART 3 – EXECUTION
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3.01 SITE PREPARATION
A. Finished Grade/Slope: Verify that finished elevations or adjacent areas are as indicated on the architectural or site plans, that the appropriate sub-grade elevation has been established for the safety surface to be installed, and that the subsurface has been installed per architectural, site or equipment plans while meeting accessibility and use zones requirements.
B. Aggregate Subbase: Tolerance of aggregate sub-base shall be within .5” in depth.
Verify that aggregate sub-base has been fully compacted. Per ADA Guidelines:
compacted Aggregate sub-base – 4” of .75” minus irregular stone with fines compacted to 95% in 2” watered lifts.
C. Concrete Sub-Base: Tolerance of concrete or bituminous sub-base shall be with .125” (3.0 mm) in 10’ (3050 mm). Per ADA Guidelines: Concrete a minimum of 3” – 4” at a minimum 2500 PSI. Concrete must cure for 7 days prior to application of attenuation cushion layer. Concrete must cure 21 days if wear course is to be applied directly to concrete surface. If poured in place surfacing is installed, verify that the concrete subbase has cured (all areas appear white in color usually at 7 days) and that all concrete curing compounds and other deleterious substances that might adversely affect adhesion have been removed. Surface shall be clean and dry.
D. Drainage: Verify that sub-surfacing drainage, if required, has been installed to provide positive drainage.
3.02 INSTALLATION
A. Poured in Place Surfacing: Components of the poured in place surfacing shall be mixed on site in a rotating tumbler to ensure components are thoroughly mixed and are in accordance with manufacturers’ recommendations. Installation of surfacing shall be seamless up to 2,000 square feet per day. Material shall cover all foundations and fill around all elements penetrating the surface.
B. Attenuation Cushion Layer: Whenever practical, attenuation cushion layer of surfacing material shall be installed in one continuous pour on the same day of up to 2,000 square feet. When a second pour is required, step the seam (see detail) and fully coat the step of the previous work with polyurethane binder to ensure 100% bond with new work. Apply adhesive in small quantities so that new attenuation cushion layer can be placed before the adhesive dries.
C. Wear Course: Wear course must be quality peroxide cured TPV granules. wear surface shall be bonded to attenuation cushion layer. If necessary, additional primer will be used between the attenuation cushion layer and wear course. Apply adhesive to attenuation cushion layer in small quantities allowing the wear course to be applied before adhesive dries. Surface shall be hand troweled to a smooth, even finish. Expect
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continuous and seamless up to 2,000 square feet per day (contact sales representative for seamless in excess of 2,000 square feet). Where seams are required due to color change, size or adverse weather, a step configuration will be constructed to maintain wear course integrity. The edge of initial pour shall be coated with adhesive and wearing surface mixture shall be immediately applied. Pads with multiple seams are encouraged to include a top coat of urethane before being placed into use. Butt joint seams are not acceptable except for repairs. Under special conditions and with Owners written approval seams may be permitted in same color pad. Consult with Manufacturer for specific applications.
D. Perimeter: For installations over existing concrete, the perimeter shall be saw cut to provide a keyway 1” deep x 1” wide, or formed during the pour, with surfacing rolled down into the void. Primer adhesive must be applied to all sides of the void. When connecting to a concrete curb or border, the inside vertical edge shall be primed with adhesive and the final 2” of the attenuation cushion layer shall be tapered to allow the wear surface material to be 1.5”– 2” thick where it joins the concrete.
E. Thickness: Construction methods such as the use of measured screeds or guides shall be employed to ensure that the full depth of specified surfacing material is installed. Surfacing system thickness throughout the playground equipment use zone shall be as required to meet the impact attenuation requirements specified herein.
F. Clean Up: Manufacturer installers shall work to minimize excessive adhesive on adjacent surfaces or play equipment. Spills of excess adhesive shall be promptly cleaned.
G. Protection: The safety surface shall be allowed to fully cure in accordance with Manufacturer’s instructions. The surface shall be protected by the owner from all traffic during the curing period of at a minimum of 48 hours or as instructed by the Manufacturer.
H. Manufacturer Services: For poured in place safety surfacing, a Manufacturer’s representative who is experienced in the installation of playground safety surfacing shall be provided. The representative shall supervise the installation to ensure that the system meets the impact attenuation requirements as specified herein.
3.03 SITE AREA CLEAN UP
The site shall be kept clean and free of tools, trash, and debris and installation materials daily. Products may be stored on site during installation with appropriate protective measures and approval by the Owner’s representative.
END OF SECTION
General Vang Pao Park Section 323119
February 2026 Decorative Metal Fences and Gates
100% Construction Documents Summary of Work
July 02, 2024 01 11 00-1
SECTION 323119
DECORATIVE METAL FENCES AND GATES
PART 1 - GENERAL
1.1 SUMMARY
A. Section Includes:
1. Steel picket fences.
2. Swing gates.
3. Gate operators, including controls.
1.2 PREINSTALLATION MEETINGS
A. Preinstallation Conference with Owner’s Representative and Landscape Architect.
1.3 ACTION SUBMITTALS
A. Product Data: For each type of product.
B. Shop Drawings: For fencing and gates.
1. Include plans, elevations, sections, and attachment details.
2. Include diagrams for power, signal, and control wiring.
C. Samples: For each fence material and for each color specified.
1.4 INFORMATIONAL SUBMITTALS
A. Field quality-control reports.
B. Product test reports.
1.5 CLOSEOUT SUBMITTALS
A. Maintenance data.
1.6 QUALITY ASSURANCE
A. Installer Qualifications: Fabricator of products.
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PART 2 - PRODUCTS
2.1 PERFORMANCE REQUIREMENTS
A. Wind Loading: Comply with ASCE/SEI 7 requirements for fence height, wind exposure, design wind speed, and design wind pressure.
B. Lightning-Protection System: Maximum grounding-resistance value of 25 ohms under normal dry conditions.
2.2 DECORATIVE STEEL FENCES
A. Decorative Steel Fences: Fences made from steel tubing and shapes.
B. Posts: Square steel tubing. Per Plan
C. Post Caps: Steel
D. Rails:
1. Steel Tube Rails: Square steel tubing per plan.
2. Steel Channel Rails: Steel channels per plan.
E. Pickets: Per plan.
1. Picket Spacing: Per plan.
F. Infill: Forge-welded-steel bar grating.
1. Perimeter Bars: Steel flat bars.
2. Vertical Main Bars: Steel flat bars.
3. Vertical Main Bar Spacing:
4. Horizontal Cross Rods:
5. Horizontal Cross Rod Spacing:
G. Fasteners: Stainless-steel carriage bolts and tamperproof nuts.
H. Fabrication: Assemble fences into sections by welding pickets to rails.
I. Fabrication: Fabricate bar grating infill into sections of size indicated.
J. Finish for Bar Grating Infill: Powder coating.
K. Finish for Steel Items: Powder coating.
L. Finish for Metallic-Coated-Steel Items: High-performance coating.
2.3 SWING GATES
A. Steel Frames and Bracing: Fabricate members from square steel tubing per plan thickness. Hotdip galvanized frames after fabrication.
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B. Hardware: Latches permitting operation from both sides of gate, hinges, and keepers for each gate leaf more than 5 feet (1.52 m) wide. Provide center gate stops and cane bolts for pairs of gates. Fabricate latches with integral eye openings for padlocking; padlock accessible from both sides of gate.
C. Steel Finish: Per plan
2.4 GATE OPERATORS
A. Gate Operators:
B. Provide factory-assembled automatic operating system designed for gate size, type, weight, and operation frequency. Provide operation control system with characteristics suitable for Project conditions, with remote-control stations, safety devices, and weatherproof enclosures; coordinate electrical requirements with building electrical system.
1. Provide operator with UL approved components.
C. Comply with NFPA 70.
D. UL Standard: Manufacturer and label gate operators to comply with UL 325.
2.5 ALUMINUM
A. Extrusions: ASTM B221 (ASTM B221M), Alloy 6063-T5.
B. Tubing: ASTM B429/B429M, Alloy 6063-T6.
C. Castings: ASTM B26/B26M, Alloy A356.0-T6.
2.6 STEEL AND IRON
A. Plates, Shapes, and Bars: ASTM A36/A36M.
B. Bars (Pickets): Hot-rolled, carbon steel complying with ASTM A29/A29M, Grade 1010.
C. Tubing: ASTM A500/A500M, cold-formed steel tubing.
D. Bar Grating: NAAMM MBG 531.
E. Uncoated Steel Sheet: Hot-rolled steel sheet, ASTM A1011/A1011M, Structural Steel, Grade 45 (Grade 310)
2.7 COATING MATERIALS
A. Intermediate Coat for Uncoated Steel: Epoxy or polyurethane intermediate recommended in writing by primer and topcoat manufacturer, per vendor.
B. Polyurethane Intermediate Coat and Topcoat: Complying with MPI #72 and compatible with undercoat.
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2.8 MISCELLANEOUS MATERIALS
A. Concrete: Normal-weight, air-entrained, ready-mix concrete complying with requirements in Section 033000 "Cast-in-Place Concrete" with a minimum 28-day compressive strength of 3000 psi (20 MPa), 3-inch slump, and 1-inch maximum aggregate size.
2.9 GROUNDING MATERIALS
A. Comply with requirements of Section 260526 "Grounding and Bonding for Electrical Systems." B. Grounding Conductors: Size as indicated on Drawings. Bare, solid wire for No. 6 AWG and smaller; stranded wire for No. 4 AWG and larger.
1. Material above Finished Grade: Aluminum.
2. Material on or below Finished Grade: Copper.
C. Grounding Connectors and Grounding Rods: Comply with UL 467.
2.10 STEEL FINISHES
A. Surface Preparation: Clean surfaces according to SSPC-SP 6/NACE No. 3, "Commercial Blast Cleaning." After cleaning, apply a conversion coating compatible with the organic coating to be applied over it.
B. Powder Coating: Immediately after cleaning, apply manufacturer's standard two-coat finish consisting of epoxy primer and TGIC polyester topcoat to a minimum total dry film thickness of not less than 8 mils. Comply with coating manufacturer's written instructions.
1. Color and Gloss: Match Architect's sample
C. After cleaning, to provide a minimum dry film thickness of 2 mils per applied coat, to surfaces that are exposed after assembly and installation, and to concealed surfaces.
D. High-Performance Coating: Apply intermediate and polyurethane topcoats to prime-coated surfaces. Comply with coating manufacturer's written instructions and with requirements in SSPCPA 1, "Paint Application Specification No. 1: Shop, Field, and Maintenance Painting of Steel," for shop painting. Apply at spreading rates recommended by coating manufacturer.
1. Match approved Samples for color, texture, and coverage. Remove and refinish or recoat work that does not comply with specified requirements.
E. Powder Coating: Immediately after cleaning and pretreating, apply manufacturer's standard TGIC polyester powder-coat finish to a minimum dry film thickness of 2 mils.
1. Color and Gloss: Match Architect's sample
F. Powder Coating: Immediately after cleaning and pretreating, apply manufacturer's standard twocoat finish consisting of zinc-rich epoxy prime coat and TGIC polyester topcoat to a minimum dry film thickness of 2 mils. Comply with coating manufacturer's written instructions to achieve a minimum total dry film thickness of 4 mils.
1. Color and Gloss: As indicated by manufacturer's designations and per contract documents.
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G. High-Performance Coating: Apply epoxy primer, polyurethane intermediate coat, and polyurethane topcoat to prepared surfaces. Comply with coating manufacturer's written instructions and with requirements in SSPC-PA 1, "Paint Application Specification No. 1: Shop, Field, and Maintenance Painting of Steel," for shop painting. Apply at spreading rates recommended by coating manufacturer.
1. Match approved Samples for color, texture, and coverage. Remove and refinish or recoat work that does not comply with specified requirements.
PART 3 - EXECUTION
3.1 DECORATIVE FENCE INSTALLATION
A. Install fences according to manufacturer's written instructions.
B. Install fences by setting posts as indicated and fastening per manufacturer.
C. Post Excavation: Per plan.
D. Post Setting: Per Plan.
1. Verify that posts are set plumb, aligned, and at correct height and spacing, and hold in position during setting with concrete or mechanical devices.
2. Concrete Fill: Per plan.
3. Posts Set in Concrete: Per plan.
4. Space posts uniformly per plan.
3.2 GATE INSTALLATION
A. Install gates according to manufacturer's written instructions, level, plumb, and secure for full opening without interference. Attach hardware using tamper-resistant or concealed means. Install ground-set items in concrete for anchorage. Adjust hardware for smooth operation and lubricate where necessary.
3.3 GATE OPERATOR INSTALLATION
A. General: Install gate operators according to manufacturer's written instructions, aligned and true to fence line and grade.
B. Excavation for Support Posts: Hand-excavate holes for bases in firm, undisturbed soil to dimensions and depths and at locations as required by gate operator component manufacturer's written instructions and as indicated.
C. Concrete Bases: Cast-in-place concrete per plan.
D. Comply with NFPA 70 and manufacturer's written instructions for grounding of electric-powered motors, controls, and other devices.
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3.4 GROUNDING AND BONDING
A. Comply with Section 260526 "Grounding and Bonding for Electrical Systems." B. Fence Grounding: Install at maximum intervals of 1500 feet except as follows:
1. Fences within 100 Feet of Buildings, Structures, Walkways, and Roadways: Ground at maximum intervals of 750 feet.
a. Gates and Other Fence Openings: Ground fence on each side of opening.
C. Grounding Method: At each grounding location, drive a grounding rod vertically until the top is 6 inches below finished grade. Connect rod to fence with No. 6 AWG conductor. Connect conductor to each fence component at grounding location.
D. Bonding Method for Gates: Connect bonding jumper between gate post and gate frame.
E. Connections: Make connections so possibility of galvanic action or electrolysis is minimized.
Select connectors, connection hardware, conductors, and connection methods so metals in direct contact are galvanically compatible.
F. Bonding to Lightning-Protection System: If fence terminates at lightning-protected building or structure, ground the fence and bond the fence grounding conductor to lightning-protection down conductor or lightning-protection grounding conductor, complying with NFPA 780.
3.5 FIELD QUALITY CONTROL
A. Testing Agency: Owner will engage a qualified testing agency to perform tests and inspections.
1. Grounding-Resistance Tests: Subject completed grounding system to a megger test at each grounding location. Measure grounding resistance not less than two full days after last trace of precipitation, without soil having been moistened by any means other than natural drainage or seepage and without chemical treatment or other artificial means of reducing natural grounding resistance. Perform tests by two-point method according to IEEE 81.
END OF SECTION 323119
General Vang Pao Park Section 323300
February 2026 Site Furnishings and Equipment
323300-1
SECTION 323300
SITE FURNISHINGS AND EQUIPMENT
PART 1 - GENERAL
1.01 CONDITIONS
A. The general provisions of the Contract, including General and Supplementary Conditions and General Requirements apply to the work specified in this Section.
1.02 DESCRIPTION
A. Work includes but is not limited to the following:
B. Furnish all labor, materials, tools, equipment, operation or methods listed, mentioned or scheduled on the Contract Documents and/or herein specified in this Section.
C. Although such Work is not specifically indicated, furnish and install all supplementary or miscellaneous items, appurtenances and devices incidental to or necessary for a sound, secure and complete installation.
D. Completely coordinate with work of all other trades.
1.03 QUALITY ASSURANCE
A. All products or items described herein shall be new, unless otherwise specified, and shall be from the specified manufacturer or approved equal. Products shall be complete in all respects, properly installed, and in perfect working order.
1.04 QUALIFICATION OF INSTALLER
A. Installer shall be thoroughly trained and experienced in the skills required, and shall be completely familiar with the products and their installation as specified on the Contract Documents and in this Section. Installer shall be present at all times during progress of Work of this Section and shall direct all work performed.
1.05 COORDINATION
A. Contractor shall be charged with the responsibility of making arrangements for the coordination of his construction operations with those of all others on the job, and he shall permit other forces so engaged to accomplish their portion of the Work without undue interference or delay.
B. Contractor shall place order for all site furnishings and equipment immediately after
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award of bid to ensure adequate time for manufacturing, shipping and installation. If any materials or equipment are not ordered in time, additional costs made by equipment manufacturers to their equipment in time to meet construction schedule together with any special handling costs, shall be borne by the Contractor. NO project extension shall be granted due to improper lead time in ordering.
1.06 SUBMITTALS
A. Submit one (1) electronic copy (preferred) or one (1) hard copy of manufacturer's catalog cuts off all products to the Owners Representative for approval. Catalog cuts shall clearly identify product, finishes, color, schedule and installation.
B. Submit one (1) electronic copy (preferred) or one (1) hard copy of the play equipment shop drawings to the Owner's Representative approval. Shop drawings shall clearly identify product, materials, connections, equipment, safety railings, finishes, color, schedule and installation.
C. All approvals must be granted prior to ordering product.
PART 2 - PRODUCTS
2.01 PARK SIGNS
A. Submit shop drawings for approval prior to ordering signs. Refer to construction plans for design; all products shall be as specified or approved equal.
PART 3 - EXECUTION
3.01 GENERAL
A. Work shall be set true to line and shall present a neat and finished appearance. Includes setting each item in its correct place, fastening it, connecting it, or incorporating it into other portions of work, as each item may require; testing and operating equipment to assure proper functioning. Furnish anchors and adhesives required for installing and attaching the equipment specified herein.
B. Install per manufacturer’s instructions and specifications.
3.02 INSTALLATION OF PARK SIGN
A. Park sign shall be located as indicated on the Contract Documents for Owner’s Representative approval prior to installation.
B. Contractor shall be responsible for installing any footing, as detailed by the manufacturer,
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onsite for signs with base.
C. Lifting points located on the top of the sign shall be patched in the field by the Contractor with color matching material.
3.03 INSTALLATION OF BENCHES
A. Locate benches as indicated on Contract Documents for Owner's Representative approval prior to installation.
B. Install items level and plumb.
C. Surface mount as detailed on the Contract Documents and in conformance with manufacturer's specifications.
3.04 INSTALLATION OF PICNIC TABLES
A. Locate picnic tables as indicated on Contract Documents for Owner's Representative approval prior to installation.
B. Install items level and plumb.
C. Surface mount as detailed on the Contract Documents and in conformance with manufacturer's specifications.
3.05 INSTALLATION OF TRASH RECEPTACLE
A. Install as detailed on the Contract Documents and in conformance with the manufacturer's specifications.
3.06 INSTALLATION OF PLAY EQUIPMENT
A. Install as detailed on the Contract Documents and in conformance with the manufacturer's specifications. Equipment shall be composed of such material and constructed as specified by the individual manufacturer’s specifications. All posts shall be steel. The contractor will be responsible for receiving and storing the play equipment until it is installed. Manufacturer to provide repair kit with paint, details, specifications and all necessary tools.
B. Coordination of all play equipment components in relation to the depth of components within the specified play area surfacing material and drainage items will be required to be verified prior to placement of order of play equipment. Verify specific play components with the type of surfacing material(s) to ensure required depths are achieved.
C. Contractor shall assemble and install playground equipment, required signs and labels in
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compliance with the written instructions of the manufacturer. The playground equipment shall be assembled and installed by or under the direct supervision of an individual who is authorized by the manufacturer to assemble and install the equipment.
D. Prior to final project approval and acceptance, the playground equipment shall be inspected by a Certified Playground Safety Inspector who shall certify in writing that the equipment, insofar as it can be seen without disassembling it or digging into the surfacing, is in compliance with ASTM F-1487-98 and CPSC Handbook Publication number 325.
E. Install in conformance with all applicable playground accessible requirements and consumer Product Safety Commission Guidelines for public playground safety.
F. The Contractor shall install a 6’-0” high temporary barrier fence around the play area, until final acceptance has been granted.
3.07 INSTALLATION OF WOOD FIBER
A. Contractor to confirm slope construction prior to installation of resilient surfacing.
B. Subgrade for play area shall be free of segregated material and shall have a relative compaction of not less than 85%. Subgrade shall be finish graded and sloped to drain to the play area catch basin at a 1% minimum slope. See Grading Drawings for more information.
C. Geotextile Fabric shall be placed on top of the prepared sub-grade as shown on the plans, so as not to allow any contact between the wood fiber and the sub-grade. Geotextile fabric shall be held in place by the use of staples or fasteners along all corners and seams at approximately 10’ O.C. or closer as required to hold fabric in place.
D. Wood Fiber shall be 100% virgin wood fiber comprised of new Incense Cedar. Wood fiber shall have blunt ends, and shall be void of mixed woods, recycled wood, nails, staples, bark, leaves, dirt, twigs or splinters. Wood Fiber shall be non-toxic with no chemicals or additives, and shall be wheelchair accessible. Wood fiber fall material shall meet CPSC & ASTM Standards for Public Playgrounds.
E. Wood fiber shall be installed within forty-eight (48) hours after play equipment is installed. Wood fiber shall be placed on top of the geotextile fabric as shown on the plans.
The wood fiber shall be uniform, level and compacted. Contractor shall thoroughly moisten wood fiber during installation and installed in lifts per manufacturer’s directions, roll each lift with a partially filled lawn roller in all directions for compaction. The wood fiber shall be compacted to a minimum 12” finished depth at the edges of play area at the time of final acceptance by the Owner. The depth of wood fiber in the center of the play area will be greater.
3.08 INSTALLATION OF PLAYGROUND RESILIENT SURFACING
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A. Refer to Section 32 18 16.13
3.09 PROTECTION
A. Adequately protect all work form damage by subsequent construction operations.
Damaged work shall be replaced by Contractor and at Contractor's expense.
END OF SECTION
General Vang Pao Park Section 328400
February 2026 Planting Irrigation
PLANTING IRRIGATION 328400 - 1
Section 328400
Planting Irrigation
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Work of this section includes all labor and materials necessary to construct and / or modify the irrigation system as shown on the drawings and specified herein.
B. The work includes all labor, materials, processes, and equipment necessary to complete and test the irrigation system work as indicated on the Drawings and specified herein.
C. All incidental parts, which are not shown on the plans or specified herein and are necessary to complete or modify the existing system shall be furnished and installed as though such parts were shown on plans or specifications.
D. The work includes, but is not limited to, the following:
1. Pipes and fittings.
2. Manual and Automatic Control Valves.
3. Rotors, Rotators, and Sprinklers.
4. Drip distribution tubing and emission devices.
5. Controller(s) and control elements.
6. Low voltage control wire and connections
7. Valve boxes and enclosures.
E. Related Documents and Sections:
1. Section 0 22 30 “Site Clearing”
2. Division 01 “Closeout Submittals”
3. Section 03 30 00 “Cast-In-Place Concrete”
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4. Section 31 20 00 “Earthwork”
5. Section 0 29 05 “Landscape Installation”
6. Section 320190.13 “Landscape Maintenance”
1.3 DEFINITIONS
A. American Public Works Association (APWA)
B. American Standards for Testing and Materials (ASTM)
C. American Water Works Association (AWWA)
D. National Electric Code (NEC)
E. Uniformed Plumbing Code (UPC)
F. Manufacturer’s Standardization Society of Valve and Fitting Industry (MSS)
1.4 SUBMITTALS
A. Product Submittals: Submit three (3) copies of the proposed irrigation construction materials to the Landscape Architect for review and approval a minimum of then (10) working days prior to commencement of work. The plan must follow the specifications and design criteria as outlined herein.
1. Each submittal shall include manufacturer’s product information (‘cut’) sheets for all components and materials proposed for use in fabricating and install the irrigation system, including but not limited to:
a. Pipes and fittings.
b. Manual valves.
c. Pressure-reducing valves.
d. Automatic control valves and accessories.
e. Transition fittings.
f. Rotors, Rotators, and Sprinklers.
g. Quick couplers.
h. Drip irrigation specialties.
i. Controllers.
j. Boxes for manual and automatic control valves.
k. Enclosures for backflow preventers and controllers.
l. Include rated capacities, and operating characteristics.
B. Record Copy Drawings: During the course of installation, carefully show all field changes in red line on a print of the irrigation system as installed. This drawing shall be labeled “Record Copy”, and shall be made available for inspection. The status of the
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“Record Drawing” shall correlate directly with the percentage of work completed as described in the Contractor’s Pay Request and may be used as a guide when approving payments.
C. As-Built Drawings: Upon completion of the work of this section and as a condition of its acceptance, the Contractor shall deliver to the Landscape Architect the following:
1. Drawings: Submit three (3) prints and one (1) reproducible and/or electronic file of as-built drawings. As-Built drawings shall clearly show all original components of the Record Copy and all changes documented in the Record Copy.
Main lines, valves, valve boxes, and valve markers and other buried equipment shall be positively located by a minimum of two dimensions each from two (2) fixed reference points.
2. Maintenance Manual: Submit three (3) copies containing the following:
a. Catalog cut sheets of all irrigation materials installed. b. Contractor’s name, address and telephone number.
c. The duration of the guarantee periods
d. The name and address of the local manufacturer’s representative. e. List and description of routine maintenance procedures, including winterization, start-up, and recommended watering times for each zone. f. Troubleshooting guide.
D. Landscape Irrigation Audit: Upon completion of the work of this section and as a condition of its acceptance, the Contractor shall deliver to the Landscape Architect the following:
1. Landscape Irrigation Audit Certificate: Submit two (2) copies of the Irrigation Audit Report prepared by a certified landscape irrigation auditor. Proof of certification must be provided with the signed and dated report.
2. Landscape Irrigation Audit must be submitted and approved prior to the Date of Final Completion.
3. Landscape Irrigation Audit shall be in compliance with the latest edition of the State of California Model Water Efficient Landscape Ordinance (MWELO). The MWELO is also referenced by Title 24, Part 11, Chapters 4 and 5 CalGreen Building Code.
4. Landscape Irrigation Audit shall be conducted by a local agency landscape irrigation auditor or a third-party certified landscape irrigation auditor. Landscape audits shall not be conducted by the person who designed or installed the landscape irrigation system.
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1.5 QUALITY ASSURANCE
A. Proprietary items shown on the drawings and specified herein are shown to establish standards of quality, utility, design and function. Equivalent units by other manufacturers (substitutions) will be considered provided they are similar in characteristics. They shall be substituted only if approved by the Landscape Architect.
B. The Contractor shall store all PVC pipe and fittings out of direct sunlight and protect from physical damage.
C. The Contractor shall store and protect all specified components from adverse weather conditions until installation is complete.
D. The Contractor shall handle all components as directed by the manufacturer’s handling and installation instructions. Damage from transport or other handling of materials shall be the responsibility of the Contractor.
E. All local, municipal and state laws and rules and regulations governing or relating to any portion of this work and hereby incorporated into and made a part of these specifications and the Contractor shall carry out their provisions. Any specification herein contained, shall not be construed to conflict with the above rules, regulations or requirements.
1.6 PROJECT CONDITIONS
A. Inspection of the site: The Contractor shall inspect the site prior to construction and verify the extent of the work required. Commencement of construction by the Contractor designates acceptance of the site conditions apparent at outset. The Contractor shall obtain approval to access system components for inspection prior to commencement of construction.
B. The Contractor shall verify the locations of all existing utilities, structures, and services before commencing work. The location of utilities, structures, and services shown on these plans are approximate only. Any discrepancies between these plans and the actual field conditions shall be reported to the Landscape Architect immediately.
C. Weather Limitations: Work shall be performed only when weather conditions do not detrimentally affect the quality of work as intended and shown on these plan sheets.
D. Project Limits: Areas, as specified within which work is to be performed.
E. If new mainline is required in areas not currently described on the construction documents, submit a shop drawing of location, hydraulics, and system layout for new extension to Landscape Architect for approval prior to commencement of construction.
F. The Contractor shall protect all areas of work defined on the drawings and any existing on-site vegetation, structures, utilities, etc. All damage which occurs as a result of work
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under this contract shall be repaired at no cost to the Owner. The contractor shall be responsible for the provision of traffic control, barricades, safety guards, and any other structures or improvements necessary for the complete protection of the public. The Contractor shall verify water sources and install labeled components as required by state and federal laws.
G. The Contractor shall verify, locate, and protect all existing utilities and features on and adjacent to the project site during construction and shall repair, at their own expense: all damage as a result of construction activities.
H. The Contractor shall, at all times, take adequate precautions to keep rock, dirt, gravel, debris, and all other foreign materials from entering piping, valves, and other irrigation equipment.
1.7 COORDINATION
A. Coordinate with other trades affecting or affected by work of this section.
B. Verify that sleeving and other conduits, of sizes and types specified, are installed as required.
C. Prior to the start of work the Contractor shall verify that the performance and components of the existing site systems are in accord with current jurisdictional requirements and that all necessary components are located as shown on the drawings.
D. The Contractor shall protect the existing site systems and maintain their performance at all times during the work of this section unless otherwise approved by the Landscape Architect. The Contractor shall cap all lines that are cut by new construction and/or reroute to maintain existing system performance.
E. The Irrigation Contractor shall have a Supervisor on-site at all times while work is being performed. Supervisor must be available to communicate with other project personnel at all times.
1.8 GUARANTEE
A. The Contractor guarantees that all new irrigation components installed, as part of this work shall be free from defects in materials, design, and workmanship for a period of one year from Date of Final Acceptance.
B. Upon notice from the Landscape Architect of failure on any part of the installed equipment during the guarantee period, due to material fatigue, normal wear or faulty installation procedures, new replacement parts shall be promptly furnished and installed by the Contractor at no additional cost to the Owner. Damages to property or site improvements resulting from the failure of specified components shall be repaired promptly, at no additional cost to the Owner.
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C. The Contractor shall be responsible for grade settlement, and/or erosion of soil surfaces resulting from defects in irrigation installation throughout the specified warranty period.
1.9 DAMAGES
A. Any structures or facilities or surfaces damaged due to work of this project shall be restored equal or better to their original condition at Contractor’s expense and to the satisfaction of the Owner and the Landscape Architect
B. The Contractor shall be responsible for all damage caused by leaks or breaks in pipe furnished or installed in this contract for one year after Date of Final Acceptance.
1.10 EXISTING UTILITIES
A. Locate and identify, with visible marking, existing underground utilities in the areas of work. If utilities are to remain in place, provide adequate means of protection during excavation operations.
B. Should uncharted piping or other utilities be encountered during excavation, consult the Landscape Architect and Owner immediately for directions. Cooperate with the Owner and public or private utility companies in keeping their respective services and facilities in operation. Repair damaged utilities to the satisfaction of the utility owner and Owner.
The cost of repairing charted or known utilities shall be paid by the contractor.
C. Do not interrupt existing utilities service facilities occupied and used by the Owner or others, except when permitted in writing by the Landscape Architect and then only after acceptable temporary utility services have been provided.
D. Point-of-connection to incoming water services for irrigation shall be made upstream of any other services.
PART 2 - PRODUCTS
2.1 GENERAL PRODUCT REQUIREMENTS
A. Materials and equipment shall be new, delivered to site in original factory condition, and as specified in this section.
2.2 PVC PIPE
A. Pipe Sleeves
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1. Pipe Sleeves Pipe sleeves six (6) inch and larger shall be High Density Polyethylene (HDPE) with smooth interior wall and annular exterior corrugations meeting ASTM F2648 or approved equal.
2. Pipe sleeves four (4) inch and smaller shall be PVC Schedule 40 Bell End, Type 1 white, NSF approved, for solvent weld meeting requirements meeting ASTM D1785 or approved equal.
B. Pressure Main Line
1. Pressure main line pipe four (4) inch and larger shall be PVC Class 200 Gasket Joint, Type 1 white, NSF approved, gasket push on pipe meeting requirements ASTM D2241.
2. Pressure main line pipe two and one half (2-1/2) to three (3) inch shall be PVC Class 315 Bell End, Type 1 white, NSF approved, for solvent weld meeting requirements ASTM D2241.
3. Pressure main line pipe two (2) inch and smaller shall be PVC Schedule 40 Bell End, Type 1 white, NSF approved, for solvent weld meeting requirements ASTM D1785.
C. Non-Pressure Lateral Line
1. Non-pressure lateral line two and one half (2-1/2) to four (4) inch: PVC Class 315, Type 1 white, NSF approved, solvent weld pipe meeting the requirements of ASTM D2241.
2. Non-pressure lateral lines two (2) inch and smaller shall be PVC Schedule 40, Type 1 white, NSF approved, solvent weld pipe meeting the requirements of ASTM D1785.
a. Solvent weld for assembly shall be as per manufacturer’s specifications. b. Non-pressure lateral fittings two and one half (2-1/2) to four (4) inch shall be PVC Schedule 40 socket and/or threaded fittings.
2.3 PVC NIPPLES
A. Pipe nipples shall be extruded PVC Schedule 80, Type 1, Schedule 80, one piece gray, standard weight with machine threads, both ends, to meet ASTM D1784, or approved equal.
2.4 IPS PVC FLEX PIPE
A. IPS PVC Flex Pipe shall be UV and Algae resistant, heavy wall, black meeting the requirements of ASTM D2287 and ASTM D1599, maximum operating pressure 60PSI @ 73° F.
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B. IPS PVC Flex Pipe shall be compatible for use with PVC Schedule 40 fittings.
2.5 PVC PIPE FITTINGS
A. Pressure Mainline Gasket Pipe Fittings.
1. Manufacturer and model as per drawings, or approved equal.
2. Joint Restraints shall be epoxy coated, ductile iron to meet ASTM A-536, Grade 65-45-12 & AWWA C153.
3. Restraints shall have blunt cast serrations. Machined threaded restraints shall not be allowed.
B. Pressure Mainline Solvent Weld Pipe Fittings.
1. Fittings shall be schedule 80, polyvinyl chloride, standard weight, or approved equal, to meet ASTM D-2467.
C. Non-Pressure Lateral Pipe Fittings.
1. Fittings shall be schedule 40, polyvinyl chloride, standard weight, or approved equal, to meet ASTM D-2466.
D. IPS PVC Flex Pipe Fittings.
1. Fittings shall be schedule 40, polyvinyl chloride, standard weight, or approved equal, to meet ASTM D-2466.
2.6 PVC CONDUIT AND FITTINGS
A. PVC Conduit shall be Schedule 40, gray, listed to UL 651 and manufactured in accordance with NEMA TC2, labeled or marked showing evidence of third-party listing to product standard, listed as sunlight resistant, listed for use with 90° conductors.
B. PVC Conduit Fittings shall be Schedule 40, gray, including fabricated fittings, junctionbox adapters, threaded adapters shall be listed to UL 651 and manufactured in accordance with NEMA TC-3.
2.7 PIPE JOINING COMPOUNDS
A. Lubricant for gasket joint pipe and joint restraints shall be as recommended by manufacturers of PVC pipe and Joint Restraints.
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B. PVC Primer shall be low VOC emission, non-bodied, fast acting, purple to meet ASTM F 656 Standard and as recommended by PVC pipe and fitting manufacturer, or approved equal.
C. PVC Solvent Cement for PVC pressure mainline pipe and fittings shall be heavy bodied, medium setting, low VOC emission, gray to meet ASTM D2564 and as recommended by PVC pipe and fitting manufacturer, or approved equal.
D. PVC Solvent Cement for PVC non pressure lateral pipe and fittings shall be medium bodied, fast setting, Low VOC emissions, clear to meet ASTM D2564 and as recommended by PVC pipe and fitting manufacturer, or approved equal.
E. PVC Solvent Cement for IPS PVC flexible pipe shall be medium bodied, fast setting, low VOC emissions, solvent cement for use on flex/flex and flex/rigid PVC, blue to meet ASTM D2564 and as recommended by IPS PVC flexible pipe manufacturer, or approved equal.
F. Teflon (PTFE) Paste for PVC threaded fittings shall be non-hardening, lubricating antisieve formulation, silicon free, suitable for sealing threads in metals, ABS, PVC, CPVC and Nylon piping systems, NSF approved to meet and exceed TT-5-1732.
G. Teflon (PTFE) Tape for PVC threaded fittings shall be medium density, white and as recommended by PVC fitting manufacturer, or approved equal.
2.8 TRANSITION FITTINGS
A. General Requirements: Same size as, and with pressure rating at least equal to and with ends compatible with, piping to be joined.
B. Transition Couplings: AWWA C219, epoxy coated ductile iron sleeve-type coupling with styrene butadiene rubber gaskets and five-eight (5/8) inch high strength bolts for underground pressure piping,
C. Plastic-to-Metal Transition Fittings: PVC Schedule 80, one-piece fitting with one end with threaded male iron pipe threads and one solvent-cement-socket end.
D. Plastic-to-Metal Transition Unions: PVC Schedule 80, four-part union with one brass threaded end, one plastic threaded end, rubber O-ring, and union nut.
2.9 BACKFLOW PREVENTER
A. Backflow Preventer: Manufacturer and model as shown on drawings and as approved by local authorities.
B. Backflow Preventer Enclosure: Vandal and weather resistant enclosure formed from stainless steel tubing and rod that is coated in a high-performance polymer coating, all
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locking and mounting hardware is manufactured entirely of stainless steel, to meet This cage has an ASSE 1060 Class III rating. Manufacturer and model as shown on drawings, or approved equal.
C. Backflow Preventer Insulated Cover: Slip on cover with grommets on both sides, R19 insulation rating using Radiant Barrier Foil (RBF) inserted between acrylic polyester and air bubble pack. Manufacturer and model as shown on drawings, or approved equal.
2.10 MAINLINE MANUAL VALVES
A. Iron Gate Valve: Manufacturer and model as shown on drawings, or approved equal.
Ductile iron gate valve shall be ANSI/AWWA C509 with rubber encapsulated resilient seated wedge, fusion bonded epoxy coating, non-rising stem, Class 125 flanged ends and two (2) inch operating nut. Operating wrenches for iron gate valve shall be steel, tee-handle with one pointed end, stem of length to operate deepest buried valve, and socket matching valve operating nut for Project.
B. Bronze Ball Valve: Manufacturer and model as shown on drawings, or approved equal.
Low lead bronze ball valve shall be NSF/ASNI Listed 372, full port (not reduced) rated to 400 WOG, 350°F and supplied with TFE Teflon seat, threaded ends (FNPT), cast bronze cross or stainless steel “T” handle.
C. Plastic Ball Valve: Manufacturer and model as shown on drawings, or approved equal.
PVC Schedule 80 ball valve shall be MSS SP-12, full port (not reduced), rated to 235 psi, 140°F and supplied with Teflon TFE seat, EPDM seals and threaded ends (FNPT) with unions both sides.
D. Bronze Garden Valve: Manufacturer and model as shown on drawings, or approved equal. Garden Valve shall be heavy duty bronze body, bent nose, NSF/ANSI 37, FNPT, 125 psi, 180 deg F, heavy duty bronze body.
2.11 QUICK COUPLING VALVE
A. Quick Coupling Valve: Manufacturer and model as shown on drawings, or approved equal. Factory-fabricated, bronze or brass, two-piece assembly. Include coupler waterseal valve; removable upper body with spring-loaded or weighted, locking rubbercovered cap; hose swivel with ASME B1.20.7, 3/4-11.5NH threads for garden hose on outlet; and operating key.
2.12 FLOW SENSOR
A. Flow Sensor: Manufacturer and model as per drawings, or approved equal. Impeller based technology with digital output pulse proportional to flow in PVC mounting tee or saddle, flow range 0.25-15 feet per second (FPS), 240 PSI maximum working pressure,
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HDPE impeller, with signal output up to 2000 feet using direct burial, twisted triad shielded cable.
2.13 AUTOMATIC MASTER VALVES
A. Bronze, Automatic Master Valve: Manufacturer and model as shown on drawings, or approved equal. Cast-bronze, normally open, dual chamber design provides no minimum flow capability, external plumbing of filter assembly, FNP, nylon reinforced EPDM diaphragm, 24volt solenoid, 0-300 GPM, 20-200 PSI.
2.14 AUTOMATIC CONTROL VALVES
A. Plastic, Automatic Control Valves: Manufacturer and model as shown on drawings, or approved equal. Glass-filled nylon body, normally closed, double beaded diaphragm seal, fabric-reinforced EPDM diaphragm and seat, captive bonnet screws, encapsulated solenoid with captive plunger, flow control, with optional pressure regulator.
2.15 SPRINKLERS
A. General Requirements: Designed for uniform coverage over entire spray area indicated at available water pressure.
B. Gear-Drive Rotor: Manufacturer and model as shown on drawings, or approved equal.
Description: 1” female NPT inlet, ABS plastic pop-up body, patented automatic arc return, part or full circle in one model, non-strippable drive mechanism, optional stainless-steel riser, factory installed drain check, color coded nozzles, radius range 37’- 71’, flow 3.8-31.5 GPM, recommended pressure 40-100 PSI C. Gear-Drive Rotor: Manufacturer and model as shown on drawings, or approved equal.
Description: 3/4” female NPT inlet, ABS plastic pop-up body, patented automatic arc return, part or full circle in one model, non-strippable drive mechanism, patented FloStop feature, factory installed drain check, color coded nozzles, radius range 17’- 46’, flow 0.36-14.8 GPM, recommended pressure 20-100 PSI D. Pop-Up Sprinkler Body: Manufacturer and model as shown on drawings, or approved equal. Description: ½” female NPT inlet, 6” pop-up height, ABS plastic pop-up body, co-molded wiper seal, heavy-duty spring, factory installed drain check, compatible with all female threaded nozzles, operational pressure range: 15-100 PSI.
E. Rotator Nozzle: Manufacturer and model as shown on drawings, or approved equal.
Description: multi-trajectory rotating stream delivery system, female threaded nozzle, low precipitation rate, automatic matched precipitation, double-flush feature on nozzle, wind-resistant technology, full circle, adjustable arc 45°-360°, and specialty patterns, radius range 6’-35’, flow range 0.17-4.27 GPM, operating pressure 30-55 PSI.
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2.16 ROOT ZONE WATERING SYSTEMS
A. Root Zone Watering System: Manufacturer and model as shown on drawings, or approved equal. Descriptions: Preassembled solid mesh tube with perforated top, internal baffles to divert water to all levels of root zone, durable locking cap, built in swing joint, pressure compensating bubbler, flow rates 0.25 and 0.50 GPM, pressure range 15-70 PSI, with fabric sleeve to prevent soil intrusion.
2.17 SPRINKLER RISERS
A. PVC Swing Joints: Manufacturer and model as shown on drawings, or approved equal.
Description: Prefabricated PVC design, 3/4” and 1” MPT ends, rotating joint sealed with O-ring constructed that parts joined are moveable either so that one of the parts may be rotated relative to the other or so that one of the parts in addition to being rotated relative to the other may be moved on its own axis, in 8”, 12” and 18” lay arm lengths, pressure rated to 315 PSI.
B. Polyethylene (PE) Swing Joints: Manufacturer and model as shown on drawings, or approved equal. Description: Prefabricated swing assembly with 1/2” MPT unique swivel elbows on both ends and linear low density polyethylene tubing in 6” and 12” lay lengths, pressure rated to 150 PSI.
2.18 DRIP IRRIGATION SPECIALTIES
A. Drip Irrigation Control Zone Kit: Manufacturer and model as per drawings, or approved equal. Description: Factory assembled kit to include glass-filled nylon body remote control valve with fabric reinforced EPDM diaphragm, and 24volt solenoid, filter with 150 mesh stainless steel screen, and pressure regulator available in 25 PSI or 40 PSI.
Kit shall come with four (4) flow ranges: low flow 0.5-15 GPM, medium flow 2-20 GPM and two (2) high flow kits 20-80 GPM and 20-100 GPM with operational pressure up to 120 PSI.
B. Blank Supply Tubing: Description: 0.600” x 0.700” thick-walled polyethylene, UV resistant, kink resistant, maximum operating pressure 80 PSI. Use with compression or threaded lock fittings, size per tubing size.
C. Distribution Tubing: .250” x .170” high quality polyethylene tubing, UV stabilized, maximum operating pressure 60 PSI. Use with ¼” barbed acetal fittings.
D. Line Source Drip Tubing: Manufacturer and model as shown on drawings, or approved equal. Description: 0.660" x 0.560" (17mm), surface or subsurface drip tubing with inline pressure compensating emitters with check valve (check valve to hold water to a height of at least 6’), anti-siphon feature, emitter spacing 12” - 24”, flow range 0.4 to
0.9 GPH, pressure range 15 - 60 PSI. Use with barbed or threaded lock fittings, size per tubing size.
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E. Point Source Emitter: Manufacturer and model as shown on drawings, or approved equal. Description: Pressure compensating 20 to 50 PSI, flow range 0.5 to 6.0 GPH, color-coded by flow, self-flushing diaphragm, self-piercing ¼” barb. Use with ¼” distribution tubing.
F. Air/Vacuum Relief Valves: Manufacturer and model as per drawings, or approved equal. Description: UV protected housing, corrosion-resistant internal parts, operating range up to 80 PSI, release air pockets without premature closure, leak free closure after release.
G. Automatic Flush Valve: Manufacturer and model as per drawings, or approved equal.
Description: Flushes debris automatically at every system startup, reversible diaphragm to coordinate with low flows 2-5 GPM or high flows 5-12 GPM, pressure range up to 60 PSI, with 17 mm barbed connection or ½” MPT connection.
H. Drip Tubing Fittings: Fittings shall be as recommended by tubing manufacturer.
1. Lock Fittings: 1/2” polyethylene tubing and line source drip tubing having an inside diameter range from .520” to .620” made with UV resistant glass reinforced polypropylene with large threaded swivel connectors, operating pressure 0-60 PSI.
2. Barbed Fittings: 17 mm Acetal fitting to be used with vinyl and PE tubing with dual barb design, operating range up to 100 PSI.
3. Compression Fittings: polyethylene compression fitting for tubing sizes .680” to .704” OD.
2.19 CONTROLLER
A. GENERAL
1. The controller shall be a full-featured commercial-industrial product for the purpose of irrigation management and monitoring of control valves, flow, and sensors, via traditional wire or two-wire decoder connections.
2. Controller manufacturer and model shall be as shown on drawings, or approved equal.
3. Controller shall have 12-255 station capability, 6 flow sensor inputs, 6 power/master valve outputs, 32 automatic programs with 10 start times each, block function to group stations, local weather sensor input, station flow “learned” mode or manual input, real-time flow monitoring, flow management to optimize watering at safe pipe velocities, true calendar date OFF programing, seasonal adjust settings in 1% to 300% increments, conditional response programing, two level user management password protection, optional plug-in communication modules for cloud or network control, optional plug-in
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communication modules for Wi-Fi/LAN/CELL, detailed alarm logs, non-water window programing, hand-held remote compatible.
4. Controller shall be enclosed in a stainless steel, weather resistant, wall mount enclosure or as a drop-in panel for installing in a top-entry enclosure.
B. CONVENTIONAL CONTROLLER
1. The controller shall have a 12-station base unit with 6-station expansion modules up to 54-stations, works with 24volt solenoids using single conductor direct burial wire, simultaneous station operation of up to 14 solenoids, station output 0.8 amp each, grey metal cabinet for interior wall mount, stainless steel cabinet for exterior wall mount, drop-in panel for top-entry exterior stand-alone enclosure.
C. DECODER CONTROLLER
1. The controller shall have a 75-station base unit with 75-station expansion modules up to 225-stations, works with 24volt solenoids with decoder modules using 2- wire twisted pair cable, up to 3 two-wire paths per output module, simultaneous station operation of up to 30 solenoids, up, grey metal cabinet for interior wall mount, stainless steel cabinet for exterior wall mount, drop-in panel for top-entry exterior stand-alone enclosure, diagnostics for decoder inventory, wire tracker and solenoid finder.
2. Decoders for Valves and Sensors shall be compatible with controller, 1,2,4, and 6 station versions, sensor decoders, field programmable accepts station number directly, can be programmed before installation at the controller interface or wireless programming after installation using the two-wire path, integrated surge protection, color coded wiring connections. Maximum distance from decoder to solenoid is 150’.
3. Hand-Held Decoder Programmer shall be able to program or re-program decoder stations, in order of skip stations for future expansion, sensor test function, built in multimeter, communicates with decoder through wireless electromagnetic induction, USB or battery power, fused test leads for unpowered decoder functions, with carry case.
4. Universal Decoder Stake shall be 10.8” to raise decoder off ground in end-up position for convenient access and wireless programming without removal, sturdy construction made of recycled materials, include zip ties to secure decoder to stake.
2.20 CONTROLLER WIRE, CABLE, AND ELECTRIC BOXES
A. Conventional Control, Common, and Spare Wire:
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1. Single conductor insulated wire size 14 AWG, nominal O.D. 0.154 inches, soft drawn bare copper meeting ASTM B-3, utilizing low density high molecular weight polyethylene insulation, suitable for direct burial applications for operating temperatures up to 60°C. Listed by UL or ETL or CSA.
2. Wire insulation shall be color coded black or red for control wire. Common wire shall be white. Spare wire shall be a color different from control and common wires.
B. 2-Wire Decoder Cable:
1. Jacketed cable containing two wires, single conductor, twisted, suitable for direct burial, for operation up to 600 volts, and temperatures up to 60°C. Soft drawn bare copper meeting the requirements of ASTM specification B-3 or B-8.
Insulation shall be low density high molecular weight polyethylene and a thickness of 0.045", per Paige Electric specification P7079D. The two conductors (blue and red) shall be twisted with a minimum lay of 4".
2. 14 AWG Decoder Cable for up to 10,000’ with decoders. 12 AWG Decoder Cable for up to 15,000’ with decoders.
3. Jacket cover shall be a different color for each wire path.
C. Wire Splices
1. Wire splices shall consist of R/Y+ connector with steel spring and flame retardant insulator, high impact UV-resistant light blue polypropylene tube, 3.7” length, 1” diameter, prefilled with moisture-resistant grease 711B, C UL US listed, UL Standard 486D, File No. E102356, listed for use in wet, damp direct bury and submersible locations with UF type cable, maximum voltage rating: 600V.
D. Electric Boxes
1. 14" x 19" body shall be gray, tapered and has a minimum wall thickness of
0.187". The body has a double wall at the top cover seat area with a minimum thickness of 0.200". The cover shall be gray, seat area has 18 structural support ribs on the underside of the seat, each with a minimum thickness of 0.200". The bottom of the body has a 0.500" flange. The 14" x 19" cover has an average thickness of 0.200". The valve box has a 3/8" 304 Brass nut for the bolt-down as a standard feature.
2.21 ENCLOSURE FOR CONTROLLER
A. Top entry, vandal and weather resistant, stainless-steel enclosure, 16"W, 38"H, 15.5"D, louvered main housing with filter screens, removable stainless-steel tray and backboard for mounting electronics. Top entry lid includes a stainless-steel piano hinge and a three-point locking mechanism at the front with two gas springs to assist with opening and closing. A cam style lock secures the flush mounted front entry door and includes
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provisions for a padlock. A continuous drainage channel around all sides of door face provides a water-tight seal with the tear drop shaped, hollow center, thermoplastic door seal. The inside door also provides adequate storage for instructions or plans. This enclosure is NEMA 3R rated and UL 508A listed.
B. Enclosure shall be equipped with a thermostatically controlled fan, manufacturer same as enclosure.
C. Enclosure shall be equipped with a vandal resistant rain witch enclosure, manufacturer and model as shown on drawings, or approved equal.
D. Concrete Base: Reinforced precast concrete four (4) inches thick, and six (6) inches greater in each direction than overall dimensions of controller. Include opening for wiring.
2.22 BOXES FOR VALVES
A. GENERAL: Manufacturer and model as shown in drawings, or approved equal. Highimpact, high-density, injection-molded structural foam polyethylene construction with a melt index between 10-12, overlapping covers prevent dirt and grass from settling in between body and cover, UV inhibitors prevent discoloration and cracking, corrugated sidewalls and reinforced lids.
B. PLASTIC BOXES
1. 6" round body is tapered and has a minimum wall thickness of 0.200". The body has a double wall at the top cover seat area with a minimum thickness of 0.130".
The bottom of the body has a 0.250" flange. The 6" round cover has an average thickness of 0.187".
2. 10" round body is tapered and has a minimum wall thickness of 0.250". The cover seat area has 8 structural support ribs on the underside of the seat, each with a minimum thickness of 0.250". The bottom of the body has a 0.500" flange. The 10" round cover has an average thickness of 0.300". The valve box has a 3/8" 304 Brass nut for the bolt-down as a standard feature.
3. 14" x 19" body is tapered and has a minimum wall thickness of 0.187". The body has a double wall at the top cover seat area with a minimum thickness of 0.200".
The cover seat area has 18 structural support ribs on the underside of the seat, each with a minimum thickness of 0.200". The bottom of the body has a 0.500" flange. The 14" x 19" cover has an average thickness of 0.200". The valve box has a 3/8" 304 Brass nut for the bolt-down as a standard feature.
4. 13" x 24" body is tapered and has a minimum wall thickness of 0.270". The body has a double wall at the top cover seat area with a minimum thickness of 0.270".
The cover seat area has 18 structural support ribs on the underside of the seat, each with a minimum thickness of 0.250". The bottom of the body has a 1.000"
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flange. The 13" x 24" cover has an average thickness of 0.320". The valve box has a 3/8" 304 Brass nut for the bolt-down as a standard feature.
5. Plastic valve box and lid shall be green when installed in turf and bark mulch areas. Plastic box and lid shall be tan when installed in decomposed granite area.
C. Valve Box Drainage Backfill: Cleaned gravel or crushed stone, extending 2” greater in each direction than overall dimensions of valve box.
D. Valve Box Wire Mesh: Wire mesh shall be twenty-three (23) gauge, one quarter (1/4) inch square, hot-dipped galvanized woven or welded mesh, heavy zinc or PVC coating, corrosion resistant, extended 2” greater in each direction than overall dimensions of valve box.
2.23 MISCELLANEOUS SPECIALTIES
A. Pressure Gauges: ASME B40.1. Two (2) inch diameter dial, glycerin filled stainless steel case shall be ASME B40.100 compliant with 200 psi dial and one-quarter (1/4) inch NPT bottom outlet.
2.24 MARKING PRODUCTS
A. Mainline Detectable Marking Tape: Detectable marking tape shall be one hundred (100) percent virgin polyethylene, acid/alkaline and corrosion resistant, 5.0mil thick, five-ply composition, blue in color with continuous marking “Caution: Irrigation Water Line Buried Below”, with 2.0mil solid aluminum foil core, encapsulated within 2.55mil polyethylene backing. Tape width shall be per manufacturer’s specification for mainline pipe size.
B. Valve Identification Tag: Manufacturer and model as shown on drawings, or approved equal. Valve identification tags shall be polyurethane Behr Desopna, with a reinforced attachment hole, two and one quarter (2-1/4) inch by two and three quarter (2-3/4) inch in size, yellow in color with double sided stamped controller and valve designation.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Site Verification of Conditions:
1. Contractor shall be acquainted with all site conditions. Should utilities or other work not shown on the plans be found during excavations, Contractor shall promptly notify Landscape Architect for instructions as to further action. Failure to do so will make Contractor liable for any and all damage arising from operations subsequent to discover of such utilities not shown on plans.
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2. Contractor shall take necessary precautions to protect site conditions. Should damage be incurred Contractor shall repair damage to its original condition or furnish and install equal replacement.
3.2 LAYOUT
A. Consideration will not be given to design changes until after award of contract.
B. Lay out work as closely to that shown on the Contract Drawings as possible. Contract Drawings are diagrammatic in nature. Adjust layout as necessary to accommodate actual site conditions. Locate pipe and valves shown under paving in adjacent planting area.
C. Full and complete coverage is required. Contractor shall make minor adjustments to layout as required to assure full and complete coverage. When such adjustments require exceeding radius limitations shown on irrigation legend, contact Landscape Architect for direction.
D. Substitutions for smaller pipe sizes will be not be accepted.
E. Contact Landscape Architect forty-eight (48) hours in advance for layout review of points of connection, backflow and controller location, mainline routing when not as shown on drawings, gate valve and remote control valve locations.
3.3 EARTHWORK
A. Perform excavation as required for installation of work included under this Section.
Restore all surfaces, existing underground installations, etc., damaged or cut as a result of excavations, to their original condition.
B. Should utilities not shown on the plans be found during excavation, promptly notify Landscape Architect for instructions as to further action. Failure to do so will make Contractor liable for any and subsequent discovery of such utilities. Indicate such utility crossings on the Record Drawings promptly.
C. Dig trenches wide enough to allow a minimum of 4-inches between parallel pipe lines.
Trenches shall be of sufficient depth to provide minimum cover from finish grade as follows:
1. Over pipe on pressure side of irrigation control valve, control wires and quick coupling valves: 24 inches.
2. Over pipe on non-pressure side of irrigation control valve: 18 inches.
3. Over pipe on sleeves: 24 inches.
4. Over pipe on drip tubing: 4 inches
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D. Trenching within the drip-line of existing trees shall not employ the use of mechanical trenching devices. Hand dig without severing roots which exceed 1-1/2” in diameter.
Notify the Landscape Architect immediately if site conditions prohibit such action.
3.4 PIPING INSTALLATION
A. General:
1. Location and Arrangement: Drawings indicate location and arrangement of piping systems. Install piping as indicated unless deviations are approved on Coordination Drawings.
2. Clean all pipes and fittings of dirt and moisture before assembly.
3. Install piping free of sags and bends.
4. Install groups of pipes parallel to each other, spaced to permit valve servicing.
5. Install fittings for changes in direction and branch connections.
6. Install unions on both sides of valves.
7. Lay piping on solid sub-base, uniformly sloped without humps or depressions.
8. Install ductile-iron piping according to AWWA C600.
9. Install PVC piping in dry weather when temperature is above 40 deg F. Allow joints to cure at least 24 hours at temperatures above 40 deg F before testing.
10. Install pressure mainline pipes a minimum of 5 feet from tree locations to avoid conflict with mature root systems.
B. Solvent-Welded Joints and Lubricants for PVC Pipes:
1. Use primer, solvents, lubricants and methods as recommended by fitting and pipe manufacturers.
2. Cure joint a minimum of one hour before applying any external stress on the piping and at least twenty-four (24) hours before placing the joint under water pressure.
C. Threaded Joints for Plastic Pipes:
1. Use Teflon tape on the threaded PVC fittings.
2. Use strap-type friction wrench only. Do not use metal-jawed wrench.
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3. When connection is plastic to metal, PVC Schedule 80 male adaptors shall be used. The male adaptor shall be hand tightened, plus one turn with a strap wrench.
Joint compound shall be Teflon tape or approved equal.
D. Laying of Pipe:
1. Pressure mainline pipes shall be bedded in at least 2-inches of sand with 2-inches of sand cover over top of piping.
2. Install detectable marking tape along entire length of pressure mainline piping with a maximum of 12-inches cover.
3. Pressure mainline pipe changes in direction shall be made only using 45° elbows.
4. Non-pressure lateral pipes shall be bedded in at least 2-inches finely divided material with no rocks or clods over 1-inch diameter to provide a uniform bearing.
5. Pipe shall be snaked from side to side of trench bottom to allow for expansion and contraction as recommended by pipe manufacturer. One additional foot per 100 feet of pipe is the minimum allowance for snaking.
6. PVC Pipe shall not be laid when there is water in the trench.
7. Install piping in sleeves under parking lots, roadways, sidewalks, and walls.
8. Cut plastic pipe with PVC pipe cutters or hacksaw to ensure a square cut. Remove burrs at cut ends prior to installation to ensure that a smooth unobstructed flow will be obtained.
9. All plastic-to-plastic joints shall be solvent-weld joints. Only primer and solvents recommended by the pipe manufacturer shall be used. Install plastic pipe and fittings as outlined and instructed by pipe manufacturer.
10. It shall be the Contractor's responsibility to make arrangements with the pipe and fitting manufacturers for any field assistance that may be necessary. Contractor shall assume full responsibility for the correct installation.
3.5 EQUIPMENT INSTALLATION
A. Gate Valves: Group valves together and locate in shrub planters where possible. Install in valve casing with valve box flush with finish grade.
B. Irrigation Control Valves: Install control valves in valve boxes where shown on drawings and group together where practical in groups not to exceed three valves per location unless otherwise shown on drawings. Install in shrub planters wherever possible. Place no closer than 12-inches and perpendicular to walk edges, buildings, and
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walls. Valve boxes shall be flush with finish grade. Install valve identification tags as per Drawings.
C. Pressure-Reducing Backflow Device: Install above ground as per manufacturer’s recommendation. Install with backflow enclosure and weather resistant cover.
Contractor shall be responsible to have valve certified within seven (7) days of connection to potable water source. Contact locale water agency for approved list of certification providers.
D. Quick Coupling Valves: Install quick coupling valves on a swing joint assembly as detailed on the Drawings. Place no closer than 12-inches and perpendicular to walk edges, buildings, and walls. Valve boxes shall be flush with finish grade.
E. Sprinkler Heads
1. Install sprinklers after hydrostatic test is completed.
2. Place all rotary pop-up sprinkler heads in lawn areas on swing joints as detailed on Drawings with top of heads 1-Inch above finish grade. Place part-circle rotary pop-up sprinkler heads 8-inches from edge of and flush with top of adjacent walks, header boards, curbs, mowing bands, or paved areas at time of installation.
Install rotary sprinklers on a swing joint assembly as detailed.
3. Install sprinkler heads on a swing joint assembly as detailed on the Drawings.
F. Root Zone Watering System
1. Install root zone watering systems using preinstalled fabric sleeve and swing joint to PVC fitting prior to attaching to lateral line.
2. After placing tree or shrub in a prepared planting hole, space the root one watering system evenly around the root ball and flush with finished grade. Each tree or shrub should have a minimum of two units.
3. Backfill the hole around the root zone watering system and compact to same relative density as surrounding area.
G. Drip Irrigation Specialties
1. Install freestanding emitters on distribution tubing riser to mounting height indicated.
2. Install drip supply tubing with 4 inches of cover.
3. Install in line emitter tubing as shown on drawings with 4 inches of cover.
4. Install vacuum relief valves in piping at high points in system and in control-valve boxes. Set valve boxes flush to finish grade.
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5. Install flush valves in valve boxes with drain rock per detail. Set valve boxes flush to finish grade.
H. Automatic Controller:
1. Install per local code and manufacturer’s latest printed instructions.
2. Connect remote control valves to controller in clockwise sequence to correspond with station setting beginning with stations 1, 2, 3, etc.
3. Affix controller name (i.e. “Controller A”) on side of controller cabinet door with letters minimum of 1 inch high.
4. Affix a non-fading copy of irrigation diagram to cabinet door below controller name. Seal irrigation diagram between two sheets of 20 mil (minimum) plastic.
5. Irrigation diagram shall be a reduced copy of the as-built drawing and shall show clearly all valves operated by the controller, showing station number, valve size, and type of planting irrigated.
6. Install earth ground as shown on Drawings and as recommended by controller manufacturer.
I. Control Wiring
1. Install control wires in conduit with piping in common trenches wherever possible. Lay to the side of pipe line. Provide 24 inch service looped at valves neatly coiled along interior of valve box.
2. Use approved wire splices at remote control valves and at line splices Line splices will be allowed only on runs of more than 500 feet. Splices at valves shall be installed within valve boxes. Line splices shall be installed in electric box.
3. Install pull boxes at a maximum of 150 feet and or at every 5th turn in conduit direction.
4. Install field ground rods and surge protection as recommended by controller manufacturer.
J. Closing of Pipe and Flushing of Lines:
1. Cap or plug all openings as soon as lines have been installed to prevent entrance of materials that would obstruct the pipe. Leave in place until removal is necessary for completion of installation.
2. Thoroughly flush out all water lines before installing heads, valves and other equipment.
3. Test as specified.
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4. Upon completion of testing, complete assembly and adjust sprinkler heads for proper distribution.
K. All sprinkler heads and quick coupling valves shall be set perpendicular to finished grades unless otherwise designated on the Drawings, or otherwise specified. Sprinkler heads adjacent to existing walls, curbs and other paved areas, shall be set to grade.
Sprinkler heads which are to be installed in lawn areas where the turf has not yet been established shall be set 1-inch above the proposed finish grade. Heads installed in this manner will be lowered to grade when the turf is sufficiently established to allow walking on it without appreciable destruction. Such lowering of heads shall be done by Contractor as part of the original contract with no additional cost to the Owner.
3.6 BACKFILL AND COMPACTING:
A. After system is operating and required tests and inspections have been made, backfill excavations and trenches with clean soil free of debris.
B. Backfill for all trenches, regardless of the type of pipe covered, shall be compacted to minimum 95 percent density under pavements, and 85 percent under planted areas.
C. Compact trenches in areas to be planted by thoroughly tamping backfill. Flooding and jetting shall not be used.
D. Dress off all areas to finish grades.
3.7 FIELD QUALITY CONTROL
A. Perform tests and inspections. Notify the Landscape Architect a minimum of forty-eight (48) hours prior to performing pressure test and inspections.
B. Perform hydrostatic tests when welded PVC joints have cured per manufacturer's instructions.
1. Pressurized Mains:
a. Completely install mains, gate valves, and control valves. Do not install laterals.
b. Fill all lines with water.
c. Pressurize the main to 120 PSI. Monitor gauge for pressure loss for four (4) hours. Maximum allowable loss over four (4) hour period - 2 psi for piping systems over 100 feet.
d. Leave lines and fittings exposed throughout testing period. e. Leaks resulting from tests shall be repaired and tests repeated until the system passes.
f. Test all gate valves for leakage.
g. Contractor must provide necessary pump and equipment required for test.
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2. Non-Pressure Laterals:
a. Test piping after laterals and risers are installed and system is fully operational.
b. Leave trenches open to detect possible leaks.
C. Submit written requests for inspections to the Landscape Architect at least forty eight (48) hours prior to anticipated inspection date.
D. Leak Test: After installation, charge system and test for leaks. Repair leaks and retest until no leaks exist.
1. Operational Test: After electrical circuitry has been energized, operate controllers and automatic control valves to confirm proper system operation.
2. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.
E. Any irrigation product will be considered defective if it does not pass tests and inspections.
F. Prepare test and inspection reports.
3.8 ADJUSTING
A. Adjust settings of controllers.
B. Adjust automatic control valves to provide flow rate at rated operating pressure required for each sprinkler circuit.
C. Adjust sprinklers and devices so they will be flush with, or not more than 1/2 inch above, finish grade.
3.9 CLEAN UP
A. Clean up shall be performed as each portion of work progresses. Remove all debris from the entire work area and remove from site. All walks and paving shall be broomed or washed down, and any damage or stains sustained due to the work shall be repaired to conditions acceptable to the Landscape Architect.
3.10 INSPECTION SCHEDULE
A. The Contractor shall be responsible for notifying the Landscape Architect forty-eight (48) house in advance for the following inspections:
1. Layout review
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PLANTING IRRIGATION 328400 - 25
2. Open trench prior to pipe installation – include base layer
3. Mainline pressure test – test shall be conducted with backflow preventor, quick couplers and control valves in place and prior to backfilling.
4. Sprinkler coverage test – A coverage test with Owner’s Representative shall be performed after a) the irrigation system is completed, b) an irrigation water audit has been performed by a Certified Irrigation Auditor (see item 3.12), c) audit recommended adjustments to the irrigation system have been made and d) programming of controller has been completed by contractor.
5. Substantial Completion
6. Final Inspection
B. The Contractor shall be responsible to be prepared for inspections including having updated record drawings available for review, correcting previously identified punch list items and adequately preparing the site for inspection.
C. In the event the Contractor calls for an inspection without having updated field record drawing available for review, correcting previously identified punch list items, or adequately preparing the site for inspection, the Contractor shall be responsible for compensating the Landscape Architect time and materials at current billing rates per hour, plus transportation costs.
1. In the event that Landscape Architect submits an invoice for compensation to the Contractor, said invoice shall be paid in full prior to scheduling subsequent inspections.
3.11 SUBSTANTIAL COMPLETION
A. The Contractor shall request inspection once the irrigation system is operational, adjustments have been made and site has been cleaned.
B. The Contractor shall submit written request for Substantial Completion inspections to the Landscape Architect at least forty-eight (48) hours prior to anticipated inspection date.
3.12 IRRIGATION WATER AUDIT
A. Contractor shall be responsible to provide an irrigation water audit after Substantial Completion and prior to Final Acceptance.
B. The irrigation water audit shall be performed by a Certified Irrigation Auditor and in accordance with the latest edition of the California Code of Regulations, Title 23, Division 2, Chapter 2.7, Model Water Efficient Landscape Ordinance.
C. The Contractor shall conduct an Irrigation Water Audit with catch can results, using a Certified Irrigation Auditor after the final field observation has been completed, and all
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February 2026 Planting Irrigation
PLANTING IRRIGATION 328400 - 26
irrigation components are installed in accordance with the plans and specifications and the irrigation system is accepted by the Owner.
D. The Irrigation Water Audit shall be conducted in accordance with the latest California Code of Regulations, Title 23, Division 2, Chapter 2.7, Model Water Efficient Landscape Ordinance.
E. Contractor to provide verification to Owner’s Representative that auditor has been provided irrigation plans and irrigation specifications prior to performing audit.
F. Contractor shall incorporate Irrigation Water Audit results while programming Irrigation Controller for specific control zones including but not limited to calculations for Zone Flow, Precipitation Rates, Irrigation Efficiency and Distribution Uniformity (DU). The acceptable DU range shall be as determined by industry standards as supplied, and directed by the manufacturer of each spray, rotor, drip emitter installed.
G. The Irrigation Water Audit shall be included in a binder complete with:
1. Cover Sheet with Location, Date, Owner and Certified Irrigation Auditor contact information.
2. Irrigation System Evaluation Checklist.
3. Sprinkler Evaluation Data Sheet for each zone. Combining results of more than one valve is not allowed.
a. Catch can results shall have locations mapped on the irrigation plan at the correct scale; map shall correlate each catch can to the Data Sheet.
4. Other information as required by latest California Code of Regulations, Title 23, Division 2, Chapter 2.7, Model Water Efficient Landscape Ordinance.
5. Recommendations to correct deficiencies noted in report.
H. Contractor to correct deficiencies noted in audit prior to coverage test. Contractor to provide additional catch can results after deficiencies have been corrected and prior to coverage test.
I. Contractor shall be responsible to make recommended adjustments to the irrigation system based on Irrigation Water Audit Report and requirements in specifications at no additional cost to owner when adjustments required are due to irrigation deficiencies.
J. Submit Irrigation Water Audit with Close-Out Documents.\ K. The irrigation water audit shall be included in a binder with:
1. Cover sheet with location, date, owner and auditor contact information
2. Irrigation system evaluation checklist
3. Sprinkler evaluation data sheet for each control zone.
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4. Other information as required by the latest edition of Model Water Efficient Landscape Ordinance
3.13 DEMONSTRATION
A. The Contractor shall schedule an irrigation demonstration with Owner after the system has been installed and Substantial Completion corrections have been completed.
B. The Demonstration shall be no less than two (2) hours and shall include the following:
1. Operation of controller system including programming demonstration, review of flow monitoring features and explanation of alerts and alarms.
2. Operation of hand-held remote equipment including field operation of system valves.
3. Operation of hand-held field decoder programmer including programing sample decoder.
4. Calibration of flow sensor and running automatic “learned” flow test.
5. Review of troubleshooting checklist for system equipment including controller, sensors, valves, filters, decoders, sprinklers and nozzles.
3.14 CLOSE OUT DOCUMENTS AND EQUIPMENT
A. Close Out Documents shall be submitted to the Landscape Architect a minimum of two (2) weeks prior to scheduling Final Inspection.
1. Record Drawings – full size set of irrigation drawings including revisions and dimensions representing the installed irrigation system. Record Drawings must be neat and legible and of sufficient quality to allow black and white reproduction of the original to be clear. Once approved by the Landscape Architect, the Contractor shall submit two (2) sets on bond prior to Final Acceptance.
2. Controller Chart – provide two (2) charts, 11 inches by 17 inches for each controller. Place one copy inside the controller enclosure. Place the other copy in Operation and Maintenance Manual. The controller chart shall be a color-coded schematic representation of the irrigation system with each valve zone identified by a unique color. The controller chart shall include a legend identifying the color, valve number, plant type and controller programming schedule including days of week and run times. Once approved by Landscape Architect, the Contractor shall submit two (2) copies hermetically sealed between two (2) pieces of 10 mil plastic.
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3. Operation and Maintenance Manual – provide two (2) binders including operating instructions, parts list and breakdown diagram for each type of equipment installed, complete copy of “approved” irrigation submittals, controller chart, irrigation schedule for each valve zone, Irrigation Audit report, signed acceptance letter from Owner for equipment received, contractor contact information, local manufacturer’s representatives contact information for equipment installed, signed Contractor Guarantee and Certificate of Insurance.
B. Equipment to be Furnished – The Contractor shall deliver to Owner all tools and equipment called for on the plans and described herein.
1. Two (2) sets of keys for locking the controller cabinet and backflow enclosure.
2. Two (2) spare valves for each type and size installed
3. Two (2) decoders for each type installed
4. Five (5) sprinklers for each type installed
5. Five (5) complete nozzle sets for each type installed
6. One hundred (100) feet of drip tubing for each type installed
7. Ten (10) drip emitters for each type installed
8. Two (2) sets of special tools for removing, disassembly and adjusting irrigation equipment installed.
9. Two (2) valve opening keys
10. Two (2) quick coupler keys and hose swivels
11. Two (2) hand held remotes control transmitters and cases
12. Two (2) hand held decoder programmers
C. Guarantee – The Contractor shall include a signed letter of warranty for all materials installed and workmanship for a period of one (1) year from final acceptance.
3.15 FINAL INSPECTION
A. The Contractor shall request Final Inspection after all corrections from previous inspections are complete, demonstration of the irrigation system is complete, approved close out documents are received, and equipment to be furnished is received by Owner.
B. The Contractor shall submit written request for Substantial Completion inspection to the Landscape Architect at least forty-eight (48) hours prior to anticipated inspection date.
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1. Final Inspection shall include review of outstanding corrections identified during Substantial Completion inspection.
C. The Landscape Architect shall issue to Owner a Certificate of Final Acceptance once all outstanding corrections identified during the final inspection have been completed.
END OF SECTION 328400
331100 - 1
General Vang Pao Park Section 331100
February 2026 Water Utility Distribution Piping
SECTION 331100
WATER UTILITY DISTRIBUTION PIPING
PART 1 - GENERAL
1.1 SECTION INCLUDES
A. Locate and verify pipe size at water system connections.
B. Provide and install water system pressure pipe, fittings, and appurtenances.
C. Provide and install all water system appurtenances, i.e. post-indicator valve(s), fire department connection(s), backflow preventer(s), hose bibb(s), fitting(s), valves(s), etc.
D. Provide and install concrete thrust blocks.
E. Connect new water system to existing service lines.
F. Disinfection and testing of new water line.
1.2 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including the Division 01 Specification Sections apply to this Section.
B. Related Sections include the following:
1. Trenching, Backfilling and Compaction – Section 312316.
1.3 SUBMITTALS
A. In accordance with Administrative Requirements:
1. Submit choice of pipe, fittings, and appurtenances for review prior to ordering.
1.4 REFERENCES
A. California Plumbing Code (CPC), latest edition.
B. California Fire Code (CFC), latest edition.
C. National Fire Protection Association (NFPA) Standard for the Installation of Private Fire Service main and their Appurtenances, latest edition.
D. Local Municipal and/or County Standard requirements as applicable.
1.5 PRODUCT DELIVERY, STORAGE, AND HANDLING
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A. Water pipe shall be delivered, handled, and stored in a way that prevents damage to the pipe and the entry of foreign materials into the pipe.
B. Regardless of cause, damaged pipe shall be replaced with new products at the expense of the Contractor.
PART 2 - PRODUCTS
2.1 WATER SERVICE PIPE AND FITTINGS
A. All domestic water piping 3-inch diameter and smaller shall be PVC Sch. 40, with solvent cement fittings compatible with the pipe.
B. All domestic water piping 4-inch in diameter shall be PVC C900, DR18.
C. All fire and domestic water piping 6-inch diameter and larger shall be PVC C900, DR14.
D. All recycled/reclaimed water piping 3-inch in diameter and smaller shall be purple PVC Sch. 40, with solvent cement fittings compatible with the pipe.
2.2 WATER SYSTEM APPURTENANCES
A. All domestic water line valves shall be bronze body ball valves centered in a valve box with a PVC riser.
B. All fire water line valves shall be resilient wedge, non-rising stem suitable for 200 psi minimum working pressure centered in a valve box with a PVC riser.
C. Domestic and fire water valve boxes shall be model G05 as manufactured by Oldcastle Infrastructure, or approved equal with lid marked “WATER.” D. All recycled/reclaimed water line valves shall be bronze body ball valves centered in a valve box with a purple PVC riser. Valve handle shall be purple and lettered “RECLAIMEDWATER.”
E. Recycled/reclaimed water valve boxes shall be model G05, color coded purple, as manufactured by Oldcastle Infrastructure, or approved equal with lid marked “RECLAIMED WATER.”
F. Post-indicator valves, fire department connections, backflow preventers shall be the model indicated on the plans per the drawing details and owner’s approved list and standard drawings, or approved equal.
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PART 3 - EXECUTION
3.1 GENERAL
A. Construction of the private domestic and recycled/reclaimed water system shall conform to the requirements of the CPC.
B. Construction of the private fire water system shall conform to the requirements of the CFC and NFPA 24, and shall be inspected during installation by the local fire authority.
3.2 POTHOLING AT CONNECTION POINTS
A. The exact location and size of existing water service lines is unknown and is depicted on the plans based upon the best information available.
B. The Contractor shall pothole in the vicinity of each connection point to verify the exact location and size of the existing water line. That information shall be presented in the form of a field sketch through the RFI process, for confirmation by the Engineer that the line as located is adequate to serve the proposed buildings.
3.3 PIPE DISTRIBUTION AND HANDLING
A. Pipe distribution shall not take place too far in advance of laying operations.
B. Pipe shall be handled carefully to avoid damage. Pipe handling by mechanical equipment shall be in accordance with the pipe manufacturer's recommendations.
C. The spigot ends of pipes and fittings that utilize polyvinyl chloride or polyurethane factory applied flexible compression joints shall not rest on the ground or pavement.
D. All pipe, fittings, and valves shall be carefully lowered into the trench by means of a derrick, ropes or other suitable tools or equipment, in such a manner as to prevent damage to pipe materials, protective coatings and linings. Under no circumstances shall pipe materials be dropped or dumped into the trench.
3.4 PIPE LAYING
A. No pipe shall be laid in water or when trench conditions are unsuitable to allow performing the job in a professional manner.
B. Pipe shall be laid with bell ends facing in the direction of laying, and shall progress uphill.
C. Pipe deflections, where permitted, shall not exceed that recommended by the pipe
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manufacturer.
D. Pipe and fittings which do not allow sufficient space for joints shall be removed and replaced with pipe and fittings of proper dimensions.
E. Every precaution shall be taken to prevent foreign material from entering the pipe. If necessary, a heavy, tightly woven canvas bag of suitable size shall be placed over each end and left there until the connection is to be made to the adjacent pipe. During laying operations, no debris, tools, clothing or other materials shall be placed in the pipe. If foreign materials do enter the pipe, they shall be removed continuously as work progresses.
F. At times when pipe laying is not in progress, the open ends of laid pipe shall be closed by a watertight plug.
G. Wherever the jointing material specified is cement, two or more lengths of pipe shall be in place ahead of each joint before such joint is finished.
H. Where PVC, SCH 40, pipe is used, pipe ends shall be lightly sanded and wiped just prior to making the joint to assure good adhesion.
I. The Contractor is advised that the County Fire Department typically inspects private fire main testing and generally requires that testing be performed with exposed joints and with the pipe restrained with partial backfill over the center of the pipe.
3.5 FLUSHING AND TESTING
A. Private Potable Water System
1. The system shall be flushed with potable water until only potable water appears at the outlet point.
2. The system shall be disinfected in accordance with Section 609.9 of the CPC.
3. The system shall be hydrostatically tested in accordance with Section 609.4 of the CPC.
B. The private fire mains shall be flushed and tested in accordance with NFPA 24:
1. Pipes shall be flushed at the design flow rate of the system or at a rate which produces a velocity in the pipe of 10 feet per second, whichever is greater.
2. The systems shall be hydrostatically tested at not less than 200 psi for two hours. Leakage at the joints shall not exceed two quarts per hour per 100 gaskets or joints.
3. Testing shall be observed by the local fire authority.
C. Tests shall be made by the Contractor in the presence of the authority having jurisdiction and the Owner’s Representative.
3.6 CONNECTIONS TO EXISTING SERVICES AND MAINS
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A. Contractor shall coordinate with city; city to make connections to existing mains where indicated on the plans. Said connections shall be made after new water pipe is flushed and tested in accordance with this specification. The Owner's Representative and County Inspector shall observe all tests.
B. Sawcut, remove, and repair existing pavements as noted on plans.
3.7 CLEAN UP
A. Remove all debris and stains resulting from the work of this section.
END OF SECTION
333000 - 1
General Vang Pao Park Section 333000
February 2026 Sanitary Sewerage Utilities
SECTION 333000
SANITARY SEWERAGE UTILITIES
PART 1 - GENERAL
1.1 SECTION INCLUDES
A. Locate and verify invert elevation of existing pipe at proposed point of connection.
B. Provide and install gravity sewer pipe.
C. Provide and install sewer cleanouts.
1.2 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including the Division 01 Specification Sections, apply to this Section.
B. Related Sections include the following:
1. Trenching, Backfilling and Compaction - Section 312316
1.3 SUBMITTALS
A. In accordance with Submittal Requirements specified:
1. Submit choice of pipe and appurtenances for review prior to ordering.
1.4 REFERENCES
A. California Plumbing Code (CPC), latest edition.
B. Published owner standards
1.5 PRODUCT DELIVERY, STORAGE, AND HANDLING
A. Sewer pipe and appurtenances shall be delivered, handled, and stored in a way that prevents damage to the pipe and prevents entry of foreign materials into the pipe.
B. Regardless of cause, damaged pipe and appurtenances shall be replaced with new products at the expense of the Contractor.
1.6 GRADE AND ALIGNMENT CONTROL
A. General
1. Necessary installation procedures, as needed to ensure pipes are installed at the location and grade staked in the field, shall be used.
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B. Method
1. One of the following methods shall be utilized to control grade and alignment:
a. Batter boards set at 25' intervals with a string line set over at least three batter boards.
b. Electronic ‘Laser’ beam set at manhole locations or grade breaks (with at least three grade points shall be checked to verify the set grade). c. Survey instrument set at cleanout to site, between cleanouts at the set grade.
C. Equipment
1. The Contractor shall furnish all equipment necessary to install and inspect the pipe installation. Grade rod shall be held to a minimum in all cases.
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PART 2 - PRODUCTS
2.1 GRAVITY SEWER PIPE AND SERVICE LATERALS
A. Sewer pipe 6 inches in diameter and smaller shall be PVC, SDR 26 with gasketed joints, or approved equal.
B. Pipe shall be green in color.
2.2 CLEANOUTS
A. As shown and detailed on the Drawings.
B. Lids shall be concrete, marked "sewer".
PART 3 - EXECUTION
3.1 GENERAL
A. Construction of the private sewer system shall conform to the requirements of the CPC, as well as Owner Standards, Drawings, and Details.
3.2 VERIFY EXISTING CONDITIONS
A. The exact location and depth of existing sewer lines is unknown and is shown based upon the best information available.
B. Prior to ordering any materials, Contractor shall pot hole in the vicinity of each point of connection and crossing with existing utilities to verify the exact location (horizontal and vertical) and size of the existing sanitary sewer/utilities. This information shall be presented in the form of a field sketch through the RFI process for review and confirmation by the Engineer that the existing line and proposed design is adequate to serve the project.
3.3 PIPE DISTRIBUTION AND HANDLING
A. Pipe distribution shall not take place too far in advance of laying operations.
B. Pipe shall be handled carefully to avoid damage. Pipe handling by mechanical equipment shall be in accordance with the pipe manufacturer's recommendations.
C. The spigot ends of pipes and fittings that utilize polyvinyl chloride or polyurethane
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General Vang Pao Park Section 333000
February 2026 Sanitary Sewerage Utilities
factory applied flexible compression joints shall not rest on the ground or pavement.
D. All pipe and fittings shall be carefully lowered into the trench by means of a derrick, ropes, or other suitable tools or equipment, in such a manner as to prevent damage to pipe materials, protective coatings and linings. Under no circumstances shall pipe materials be dropped or dumped into the trench.
3.4 PIPE LAYING
A. No pipe shall be laid in water or when trench conditions are unsuitable to allow performing the job in a professional manner.
B. Pipe shall be laid with bell ends facing in the direction of laying and shall progress uphill.
C. Pipe deflections where permitted shall not exceed that recommended by the pipe manufacturer.
D. Pipe and fittings which do not allow sufficient space for joints shall be removed and replaced with pipe and fittings of proper dimensions.
E. Every precaution shall be taken to prevent foreign material from entering the pipe. If necessary, a heavy, tightly woven canvas bag of suitable size shall be placed over each end and left there until the connection is to be made to the adjacent pipe. During laying operations, no debris, tools, clothing or other materials shall be placed in the pipe. If foreign materials do enter the pipe, they shall be removed continuously as work progresses.
F. At times when pipe laying is not in progress, the open ends of laid pipe shall be closed by a watertight plug.
G. Wherever the jointing material specified is cement, two or more lengths of pipe shall be in place ahead of each joint before such joint is finished.
3.5 TESTING
A. All new sewer laterals shall be tested in accordance with procedures specified in the CPC, Section 712.2 (Water Test) as described herein. The tests shall be observed by the Owner's Representative.
B. The water test shall be applied to the drainage and vent systems either in its entirety or in sections. If the test is applied to the entire system, openings in the piping shall be tightly closed, except the highest opening, and the system filled with water to point of overflow. If the system is tested in sections, each opening shall be tightly plugged, except the highest opening of the section under test, and each section shall
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be filled with water, but no section shall be tested with less than a ten (10) foot (3,048 mm) head of water. In testing successive sections, not less than the upper ten (10) feet (3,048 mm) of the next preceding section shall be tested, so that no joint or pipe in the building (except the uppermost ten (10) feet (3,048 mm) of the system) shall have been submitted to a test of less than a ten (10) foot (3,048 mm) head of water. The water shall be kept in the system, or in the portion under test, for not less than fifteen
(15) minutes before inspection starts. The system shall then be tight at points.
C. An Owner Inspector shall witness all sewer utility testing.
3.6 CLEAN UP
A. Remove all debris and stains resulting from the work of this section.
END OF SECTION
334000 - 1
General Vang Pao Park Section 334000
February 2026 Site Drainage
SECTION 334000
SITE DRAINAGE
PART 1 - GENERAL
1.1 SECTION INCLUDES
A. Provide and install storm and roof drain pipe and appurtenances.
B. Provide and install subdrain pipe and appurtenances.
C. Provide and install storm and roof drain system structures, including clean-outs, drainage inlets, etc.
1.2 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including the Division 01 Specification Sections, apply to this Section.
B. Related Sections include the following:
1. Trenching, Backfilling and Compaction - Section 312316
1.3 SUBMITTALS
A. In accordance with Administrative Requirements Specifications:
1. Submit choice of storm drain pipe and cleanouts, drainage structures, and drainage grates to Engineer for review prior to ordering.
1.4 PRODUCT DELIVERY, STORAGE, AND HANDLING
A. Storm drain and roof drain piping and structures shall be delivered, handled, and stored in a way that prevents damage to the pipe/structures, or the entry of foreign materials into the pipe.
B. Regardless of cause, damaged pipe/structures shall be replaced with new products at the expense of the Contractor.
1.5 GRADE AND ALIGNMENT CONTROL
A. General
1. The necessary installation procedures that will ensure the pipes are installed at the location and grade staked in the field shall be used.
B. Method
1. One of the following methods shall be utilized to control grade and alignment:
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General Vang Pao Park Section 334000
February 2026 Site Drainage
a. Electronic ‘Laser’ beam set at structure locations or grade breaks. At least three grade points shall be checked to verify the set grade. b. Survey instrument set at structure to site between structures at the set grade.
C. Equipment
1. The Contractor shall furnish all equipment necessary to install and inspect the pipe installation. Grade rod shall be held to a minimum in all cases.
PART 2 - PRODUCTS
2.1 STORM DRAIN PIPE
A. Storm drain and roof pipe 8” to 12" in diameter shall be Polyvinyl Chloride Pipe (PVC), SDR 35, Series 46, High Density Polyethylene (HDPE),Type S, or approved equal.
B. Storm drain and roof pipe 4” to 6" in diameter and shall be Polyvinyl Chloride Pipe (PVC), SDR 35, Series 46, or approved equal
C. Storm and roof drain pipe 3” diameter and smaller shall be Polyvinyl Chloride Pipe (PVC), SCH 80, or approved equal.
D. Subdrain pipe shall be perforated Polyvinyl Chloride Pipe (PVC), SDR 35, Series 46, or approved equal.
E. PVC pipe (SDR 35) shall be have with water tight, gasketed couplings.
F. PVC pipe (SCH 80) shall have solvent weld couplings.
G. PVC pipe shall have fittings (ells, tees, wyes, etc.) compatible to the pipe type.
2.2 DRAINAGE STRUCTURES
A. Drainage inlets (SDDI) noted on the plan as “1212”, “1818” or “2424” shall be as manufactured by Oldcastle Infrastructure, or approved equal, and shall be of the model/size indicated on the plans. Grates shall be heavy duty in hard surfaced areas with ½” maximum opening bolt down grates, and standard duty in planting areas, with bolt down grates.
B. SDDIs placed in concrete areas shall be installed with a paving notch.
PART 3 - EXECUTION
334000 - 3
General Vang Pao Park Section 334000
February 2026 Site Drainage
3.1 GENERAL
A. All construction of the storm drain shall conform to the requirements of applicable local municipal/County Standards.
3.2 VERIFY EXISTING CONDITIONS
A. The exact location and depth of the existing storm drains is unknown and is shown based on the best information available.
B. Prior to ordering of any materials, Contractor shall pot hole in the vicinity of each point of connection and crossing with existing utilities to verify the exact location (horizontal and vertical) and size of the existing storm drain/existing utilities. This information shall be presented in the form of a field sketch through the RFI process for review and confirmation by the Engineer that the proposed design is adequate to serve the project.
3.3 STORM DRAIN PIPE
A. Trenching shall be as indicated in Section 312316, Trenching, Backfilling and Compaction.
B. Pipe laying shall be as indicated in paragraph 3.05 herein.
C. No pipe shall be installed which is cracked, damaged or otherwise unsuitable for use in the opinion of the Engineer.
3.4 STORM DRAINAGE STRUCTURES
A. Excavation and backfill shall conform to Section 312316, Trenching, Backfilling and Compaction.
B. Joints shall be grouted to form a watertight seal. Any visible leaks shall be permanently plugged.
3.5 PIPE LAYING
A. No pipe shall be laid when trench conditions are unsuitable to allow performing the job in a professional manner.
B. Where ground water occurs, pumping shall continue until backfilling has progressed to a sufficient height to prevent flotation of the pipe. Water shall be disposed of in such a manner as to cause no property damage or be a hazard to public health in accordance with Section 31 2316, Trenching, Backfilling and Compaction.
334000 - 4
General Vang Pao Park Section 334000
February 2026 Site Drainage
C. Pipe shall be laid with bell ends facing in the direction of laying, and shall progress uphill/upslope.
D. Pipe deflections where permitted shall not exceed that recommended by the pipe manufacturer.
E. If High Density Polyethylene (HDPE) pipe is used, the exterior ribbed wall may be removed to avoid conflicts with other utilities. The extent of the removal shall not exceed 18” measured along the length of the pipe.
F. Every precaution shall be taken to prevent foreign material from entering the pipe. If necessary, a heavy, tightly woven canvas bag of suitable size shall be placed over each end and left there until the connection is to be made to the adjacent pipe. During laying operations, no debris, tools, clothing or other materials shall be placed in the pipe. If foreign materials do enter the pipe, they shall be removed continuously as work progresses.
G. At times when pipe laying is not in progress, the open ends of laid pipe shall be closed by a water-tight plug.
3.6 CLEAN UP
A. Remove all debris and stains resulting from the work of this section.
B. Properly repair all surfaces disturbed by construction.
END OF SECTION
EXHIBIT “C” – SPECIAL CONDITIONS
ARTICLE 1 BONDS
Within ten (10) calendar days from the date the Contractor is notified of award of the Contract, the Contractor shall deliver to the City four identical counterparts of the Performance Bond and Payment Bond on the forms supplied by the City and included as Exhibit “F” to the Contract. Failure to do so may, in the sole discretion of City, result in the forfeiture of Contractor’s bid security. The surety supplying the bond must be an admitted surety insurer, as defined in Code of Civil Procedure Section 995.120, authorized to do business as such in the State of California and satisfactory to the City. The Performance Bond and the Payment Bond shall be for one hundred percent (100%) of the Total Contract Price.
EXHIBIT “F” – PAYMENT AND PERFORMANCE BONDS
PERFORMANCE BOND
KNOW ALL PERSONS BY THESE PRESENTS:
THAT WHEREAS, the City of Merced (hereinafter referred to as “City”) has awarded to STOCKBRIDGE GENERAL CONTRACTING, INC., (hereinafter referred to as the “Contractor”) an agreement for CP240049 – General Vang Pao Park (hereinafter referred to as the “Project”).
WHEREAS, the work to be performed by the Contractor is more particularly set forth in the Contract Documents for the Project dated ________________, (hereinafter referred to as “Contract Documents”), the terms and conditions of which are expressly incorporated herein by reference; and
WHEREAS, the Contractor is required by said Contract Documents to perform the terms thereof and to furnish a bond for the faithful performance of said Contract Documents.
NOW, THEREFORE, we, Stockbridge General Contracting, Inc., the undersigned Contractor and _____________________________________________ as Surety, a corporation organized and duly authorized to transact business under the laws of the State of California, are held and firmly bound unto the City in the sum of Nine Hundred Eighty Six Thousand Nine Hundred Seventy Seven Dollars, ($986,977.00), said sum being not less than one hundred percent (100%) of the total amount of the Contract, for which amount well and truly to be made, we bind ourselves, our heirs, executors and administrators, successors and assigns, jointly and severally, firmly by these presents.
THE CONDITION OF THIS OBLIGATION IS SUCH, that, if the Contractor, his or its heirs, executors, administrators, successors or assigns, shall in all things stand to and abide by, and well and truly keep and perform the covenants, conditions and agreements in the Contract Documents and any alteration thereof made as therein provided, on its part, to be kept and performed at the time and in the manner therein specified, and in all respects according to their intent and meaning; and shall faithfully fulfill all obligations including the oneyear guarantee of all materials and workmanship; and shall indemnify and save harmless the City, its officers and agents, as stipulated in said Contract Documents, then this obligation shall become null and void; otherwise it shall be and remain in full force and effect.
As a condition precedent to the satisfactory completion of the Contract Documents, unless otherwise provided for in the Contract Documents, the above obligation shall hold good for a period of one (1) year after the acceptance of the work by City, during which time if Contractor shall fail to make full, complete, and satisfactory repair and replacements and totally protect the City from loss or damage resulting from or caused by defective materials or faulty workmanship, Surety shall undertake and faithfully fulfill all such obligations. The obligations of Surety hereunder shall continue so long as any obligation of Contractor remains. Nothing herein shall limit the City’s rights or the Contractor or Surety’s obligations under the Contract, law or equity, including, but not limited to, California Code of Civil Procedure section 337.15.
Whenever Contractor shall be, and is declared by the City to be, in default under the Contract Documents, the Surety shall remedy the default pursuant to the Contract Documents, or shall promptly, at the City’s option:
(1) Take over and complete the Project in accordance with all terms and conditions in the Contract Documents; or
(2) Obtain a bid or bids for completing the Project in accordance with all terms and conditions in the Contract Documents and upon determination by Surety of the lowest responsive and responsible bidder, arrange for a Contract between such bidder, the Surety and the City, and make available as work progresses sufficient funds to pay the cost of completion of the Project, less the balance of the contract price, including other costs and damages for which Surety may be liable. The term “balance of the contract price” as used in this paragraph shall mean the total amount payable to Contractor by the City under the Contract and any modification thereto, less any amount previously paid by the City to the Contractor and any other set offs pursuant to the Contract Documents.
(3) Permit the City to complete the Project in any manner consistent with local, California and federal law and make available as work progresses sufficient funds to pay the cost of completion of the Project, less the balance of the contract price, including other costs and damages for which Surety may be liable. The term “balance of the contract price” as used in this paragraph shall mean the total amount payable to Contractor by the City under the Contract and any modification thereto, less any amount previously paid by the City to the Contractor and any other set offs pursuant to the Contract Documents.
Surety expressly agrees that the City may reject any contractor or subcontractor which may be proposed by Surety in fulfillment of its obligations in the event of default by the Contractor.
Surety shall not utilize Contractor in completing the Project nor shall Surety accept a bid from Contractor for completion of the Project if the City, when declaring the Contractor in default, notifies Surety of the City’s objection to Contractor’s further participation in the completion of the Project.
The Surety, for value received, hereby stipulates and agrees that no change, extension of time, alteration or addition to the terms of the Contract Documents or to the Project to be performed thereunder shall in any way affect its obligations on this bond, and it does hereby waive notice of any such change, extension of time, alteration or addition to the terms of the Contract Documents or to the Project, including but not limited to the provisions of sections 2819 and 2845 of the California Civil Code.
IN WITNESS WHEREOF, we have hereunto set our hands and seals this _______ day of ______________, 20__).
(Corporate Seal)
Contractor/ Principal
By
Title
(Corporate Seal) Surety
By
Attorney-in-Fact
Signatures of those signing for the Contractor and Surety must be notarized and evidence of corporate authority attached.
(Attach Attorney-in-Fact Certificate) Title
The rate of premium on this bond is ____________ per thousand. The total amount of premium charges, $_______________________________.
(The above must be filled in by corporate attorney.)
THIS IS A REQUIRED FORM
Any claims under this bond may be addressed to:
(Name and Address of Surety) ___________________________________________ ___________________________________________
___________________________________________
(Name and Address of Agent or ___________________________________________ Representative for service of
process in California, if different ___________________________________________ from above)
___________________________________________
(Telephone number of Surety and ___________________________________________ Agent or Representative for service
of process in California)
NOTE: A copy of the Power-of-Attorney authorizing the person signing on behalf of the Surety to do so must be attached hereto.
Notary Acknowledgment
A notary public or other officer completing this certificate verifies only the identity of the individual who signed the document to which this certificate is attached, and not the truthfulness, accuracy, or validity of that document.
STATE OF CALIFORNIA
COUNTY OF ______________
On , 20___, before me, _______________________________, Notary Public, personally appeared , who proved to me on the basis of satisfactory evidence to be the person(s) whose name(s) is/are subscribed to the within instrument and acknowledged to me that he/she/they executed the same in his/her/their authorized capacity(ies), and that by his/her/their signature(s) on the instrument the person(s), or the entity upon behalf of which the person(s) acted, executed the instrument.
I certify under PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph is true and correct.
WITNESS my hand and official seal.
Signature of Notary Public
OPTIONAL
Though the information below is not required by law, it may prove valuable to persons relying on the document and could prevent fraudulent removal and reattachment of this form to another document.
CAPACITY CLAIMED BY SIGNER DESCRIPTION OF ATTACHED DOCUMENT Individual
Corporate Officer
Title(s) Title or Type of Document
Partner(s) Limited
General Number of Pages
Attorney-In-Fact
Trustee(s)
Guardian/Conservator Date of Document
Other:
Signer is representing:
Name Of Person(s) Or Entity(ies)
Signer(s) Other Than Named Above
NOTE: This acknowledgment is to be completed for Contractor/Principal.
Notary Acknowledgment
A notary public or other officer completing this certificate verifies only the identity of the individual who signed the document to which this certificate is attached, and not the truthfulness, accuracy, or validity of that document.
STATE OF CALIFORNIA
COUNTY OF ______________
On , 20___, before me, _______________________________, Notary Public, personally appeared , who proved to me on the basis of satisfactory evidence to be the person(s) whose name(s) is/are subscribed to the within instrument and acknowledged to me that he/she/they executed the same in his/her/their authorized capacity(ies), and that by his/her/their signature(s) on the instrument the person(s), or the entity upon behalf of which the person(s) acted, executed the instrument.
I certify under PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph is true and correct.
WITNESS my hand and official seal.
Signature of Notary Public
OPTIONAL
Though the information below is not required by law, it may prove valuable to persons relying on the document and could prevent fraudulent removal and reattachment of this form to another document.
CAPACITY CLAIMED BY SIGNER DESCRIPTION OF ATTACHED DOCUMENT Individual
Corporate Officer
Title(s) Title or Type of Document
Partner(s) Limited
General Number of Pages
Attorney-In-Fact
Trustee(s)
Guardian/Conservator Date of Document
Other:
Signer is representing:
Name Of Person(s) Or Entity(ies)
Signer(s) Other Than Named Above
NOTE: This acknowledgment is to be completed for the Attorney-in-Fact. The Power-of Attorney to local representatives of the bonding company must also be attached.
PAYMENT BOND
KNOW ALL MEN BY THESE PRESENTS That
WHEREAS, the City of Merced (hereinafter designated as the “City”), by action taken or a resolution passed ___________ , 20____has awarded to STOCKBRIDGE GENERAL CONTRACTING, INC., hereinafter designated as the “Principal,” a contract for the work described as follows:
CP240049 – General Vang Pao Park (the “Project”); and
WHEREAS, the work to be performed by the Principal is more particularly set forth in the Contract Documents for the Project dated __________________ (“Contract Documents”), the terms and conditions of which are expressly incorporated by reference; and WHEREAS, said Principal is required to furnish a bond in connection with said contract; providing that if said Principal or any of its Subcontractors shall fail to pay for any materials, provisions, provender, equipment, or other supplies used in, upon, for or about the performance of the work contracted to be done, or for any work or labor done thereon of any kind, or for amounts due under the Unemployment Insurance Code or for any amounts required to be deducted, withheld, and paid over to the Employment Development Department from the wages of employees of said Principal and its Subcontractors with respect to such work or labor the Surety on this bond will pay for the same to the extent hereinafter set forth.
NOW THEREFORE, we, the Principal and __________________________ as Surety, are held and firmly bound unto the City in the penal sum of Nine Hundred Eighty Six Thousand Nine Hundred Seventy Seven Dollars, ($986,977.00) lawful money of the United States of America, for the payment of which sum well and truly to be made, we bind ourselves, our heirs, executors, administrators, successors and assigns, jointly and severally, firmly by these presents.
THE CONDITION OF THIS OBLIGATION IS SUCH that if said Principal, his or its subcontractors, heirs, executors, administrators, successors or assigns, shall fail to pay any of the persons named in Section 9100 of the Civil Code, fail to pay for any materials, provisions or other supplies, used in, upon, for or about the performance of the work contracted to be done, or for any work or labor thereon of any kind, or amounts due under the Unemployment Insurance Code with respect to work or labor performed under the contract, or for any amounts required to be deducted, withheld, and paid over to the Employment Development Department or Franchise Tax Board from the wages of employees of the contractor and his subcontractors pursuant to Section 18663 of the Revenue and Taxation Code, with respect to such work and labor the Surety or Sureties will pay for the same, in an amount not exceeding the sum herein above specified.
This bond shall inure to the benefit of any of the persons named in Section 9100 of the Civil Code so as to give a right of action to such persons or their assigns in any suit brought upon this bond.
It is further stipulated and agreed that the Surety on this bond shall not be exonerated or released from the obligation of this bond by any change, extension of time for performance, addition, alteration or modification in, to, or of any contract, plans, specifications, or agreement pertaining or relating to any scheme or work of improvement herein above described, or pertaining or relating to the furnishing of labor, materials, or equipment therefore, nor by any change or modification of any terms of payment or extension of the time for any payment pertaining or relating to any scheme or work of improvement herein above described, nor by any rescission or attempted rescission of the contract, agreement or bond, nor by any conditions precedent or subsequent in the bond attempting to limit the right of recovery of claimants otherwise entitled to recover under any such contract or agreement or under the bond, nor by any fraud practiced by
any person other than the claimant seeking to recover on the bond and that this bond be construed most strongly against the Surety and in favor of all persons for whose benefit such bond is given, and under no circumstances shall Surety be released from liability to those for whose benefit such bond has been given, by reason of any breach of contract between the owner or City and original contractor or on the part of any obligee named in such bond, but the sole conditions of recovery shall be that claimant is a person described in Section 9100 of the Civil Code, and has not been paid the full amount of his claim and that Surety does hereby waive notice of any such change, extension of time, addition, alteration or modification herein mentioned and the provisions of sections 2819 and 2845 of the California Civil Code.
IN WITNESS WHEREOF, we have hereunto set our hands and seals this _______ day of ______________, 20__.
(Corporate Seal)
Contractor/ Principal
By
Title
(Corporate Seal) Surety
By
Attorney-in-Fact
Title
Signatures of those signing for the Contractor and Surety must be notarized and evidence of corporate authority attached. A Power-of-Attorney authorizing the person signing on behalf of the Surety to do so must be attached hereto.
NOTE: A copy of the Power-of-Attorney authorizing the person signing on behalf of the Surety to do so must be attached hereto.
Notary Acknowledgment
A notary public or other officer completing this certificate verifies only the identity of the individual who signed the document to which this certificate is attached, and not the truthfulness, accuracy, or validity of that document.
STATE OF CALIFORNIA
COUNTY OF ______________
On , 20___, before me, _______________________________, Notary Public, personally appeared , who proved to me on the basis of satisfactory evidence to be the person(s) whose name(s) is/are subscribed to the within instrument and acknowledged to me that he/she/they executed the same in his/her/their authorized capacity(ies), and that by his/her/their signature(s) on the instrument the person(s), or the entity upon behalf of which the person(s) acted, executed the instrument.
I certify under PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph is true and correct.
WITNESS my hand and official seal.
Signature of Notary Public
OPTIONAL
Though the information below is not required by law, it may prove valuable to persons relying on the document and could prevent fraudulent removal and reattachment of this form to another document.
CAPACITY CLAIMED BY SIGNER DESCRIPTION OF ATTACHED DOCUMENT Individual
Corporate Officer
Title(s) Title or Type of Document
Partner(s) Limited
General Number of Pages
Attorney-In-Fact
Trustee(s)
Guardian/Conservator Date of Document
Other:
Signer is representing:
Name Of Person(s) Or Entity(ies)
Signer(s) Other Than Named Above
NOTE: This acknowledgment is to be completed for Contractor/Principal.
Notary Acknowledgment
A notary public or other officer completing this certificate verifies only the identity of the individual who signed the document to which this certificate is attached, and not the truthfulness, accuracy, or validity of that document.
STATE OF CALIFORNIA
COUNTY OF ______________
On , 20___, before me, _______________________________, Notary Public, personally appeared , who proved to me on the basis of satisfactory evidence to be the person(s) whose name(s) is/are subscribed to the within instrument and acknowledged to me that he/she/they executed the same in his/her/their authorized capacity(ies), and that by his/her/their signature(s) on the instrument the person(s), or the entity upon behalf of which the person(s) acted, executed the instrument.
I certify under PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph is true and correct.
WITNESS my hand and official seal.
Signature of Notary Public
OPTIONAL
Though the information below is not required by law, it may prove valuable to persons relying on the document and could prevent fraudulent removal and reattachment of this form to another document.
CAPACITY CLAIMED BY SIGNER DESCRIPTION OF ATTACHED DOCUMENT Individual
Corporate Officer
Title(s) Title or Type of Document
Partner(s) Limited
General Number of Pages
Attorney-In-Fact
Trustee(s)
Guardian/Conservator Date of Document
Other:
Signer is representing:
Name Of Person(s) Or Entity(ies)
Signer(s) Other Than Named Above
NOTE: This acknowledgment is to be completed for the Attorney-in-Fact. The Power-of Attorney to local representatives of the bonding company must also be attached.
APPENDIX
CITY OF MERCED STANDARD DESIGNS
THE FOLLOWING STANDARDS ARE FOR REFERENCE ONLY
REFER TO THE CITY OF MERCED WEBSITE FOR THE COMPLETE LISTING OF
STANDARD DETAILS
https://www.cityofmerced.org/departments/engineering/standard-designs/
STATE GENERAL PREVAILING WAGE RATES
General prevailing wage determination
Made by the Director of Industrial Relations
Pursuant to California Labor Code part 7,
Chapter 1, article 2, sections 1770, 1773, and 1773.1
__________________________________________________
State of California Department of Industrial Relations Website:
http://www.dir.ca.gov/OPRL/PWD/index.htm
REGULATION VIII – FUGITIVE PM10 PROHIBITIONS