TECHNICAL SPECIFICATIONS

FOR

CASCO CIVIL – STOCKTON MODOT MAINTENANCE FACILITY

LAGOON CLOSURE

CEDAR COUNTY, MISSOURI

KYLE J. LANDWEHR – PROFESSIONAL ENGINEER

LICENSE NO. PE-2023000495

BARTLETT & WEST, INC.

MISSOURI CERTIFICATE OF AUTHORITY NO. 000167-ENGINEERING

601 Monroe Street, Suite 201

Jefferson City, MO 65101

(573) 634-3181

PROJECT NO. 21321.101

DATE PREPARED: OCTOBER 2024

10/01/2024

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021321.101 / 021321.101

CASCO Civil Lagoon Closure

310000 - 1 EARTHWORK

PART 1 GENERAL

1.01 WORK INCLUDED

SECTION 310000

EARTHWORK

A. This section includes the site preparation activities and defines certain items and aspects of earthwork relative to other work.

B. Provide all operations necessary to complete site clearing, stockpiling, dewatering, excavations, embankments and backfilling, subgrade preparation, placement of topsoil, and finished grading.

C. Construct and maintain all temporary drainage swales, berms and diversions; furnish, operate, and maintain all necessary pumping and other equipment for dewatering. After above items serve their purpose, remove them and restore site.

1.02 GENERAL

A. Definition: Earthwork is defined as all excavation, trenching, fill, backfill, site preparation, subgrade preparation and other appurtenant work.

B. Classification: Excavation shall be unclassified, and the term "excavation" shall include all material encountered without regard to its physical properties, characteristics or composition.

C. Limits of the Work:

1. Earthwork shall not extend beyond the areas of excavation, embankment or other construction shown on the drawings.

2. Excavations for new construction shall not undercut existing footings and foundations.

D. Safety and Protection:

1. Shoring, sheeting and bracing shall be provided as required to protect the work and workmen from damage or injury by caving or sloughing.

2. Laws and ordinances regulating health and safety measures shall be strictly observed.

E. Blasting: Blasting will not be permitted.

1.03 REFERENCES

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

1. D 698 Moisture-Density Relations of Soils Using 5.5 lb. (2.5 kg) Rammer and a 12 inch (304.8 mm) Drop.

2. D 2922 Test Methods for Density of Soil and Soil Aggregate In Place by Nuclear

Methods (Shallow Depth).

3. D4318 Test Methods for Liquid Limit, Plastic Limit and Plasticity Index of Soils.

4. D4546 Test Method for One-Dimensional Swell/Settlement Potential of Cohesive Soils.

B. American Association of State Highway and Transportation Officials (AASHTO):

1. M6 Fine Aggregate for Portland Cement Concrete.

2. T99 Moisture Density Relations of Soils, Using a 5.5 lb. (2.5 kg) Rammer and a 12 inch (305 mm) Drop.

C. Military Standard (MIL-STD-619):

1. MIL-STD-619B Unified Soil Classification System for Roads, Airfields, Embankments and Foundations.

D. Missouri Department of Transportation (MoDOT):

1. 2024 Edition Standard Specifications for Highway Construction.

E. Federal Register - Occupational Safety and Health Administration (OSHA)

1. 29CFR Part 1926 Occupation Safety and Health Standards - Excavations.

F. Department of the Army, Kansas City District, Corps of Engineers:

310000 - 2 EARTHWORK

1. Guidebook General information for sponsors of flood protection projects constructed by the Corps of Engineers.

1.04 SUBMITTALS

A. Submit shop drawings and submittals in accordance with the project’s submittal requirements.

B. Bedding and Backfill Materials: The Contractor shall notify the Engineer of the off-site sources of bedding and backfill materials and submit to the Engineer detailed information of the materials to be used including but not limited to a sieve analysis and Standard Proctor Curve.

C. Density test results as required by this specification.

1.05 QUALITY CONTROL

A. Prior to the placement of any excavated or borrowed soils, each type of soil approved for fill or backfill shall have a Standard Proctor Curve developed to indicate the moisture-density relationship required to obtain maximum density.

B. Compaction Testing:

1. Sample backfill materials for the density testing shall be taken according to ASTM D75.

2. Compaction is the calculated ratio of the in-place (dry) density to the laboratory maximum (dry) density expressed as a percentage.

3. Determine laboratory moisture-density relations of soils according to the ASTM test method identified in the specific subsection.

4. The following table identifies the compaction required based on the location of the soil:

LOCATION COMPACTION DENSITY

Under paved areas, sidewalks and piping 90% of ASTM D 1557 or 95% of ASTM

D698

Unpaved areas 85% of ASTM D698

Inside of structures under foundations, under equipment support pads, under slabs-on-grade and scarified existing subgrade under fill material

90% of ASTM D1557 or 95% of ASTM

Outside structures next to walls, piers, columns and any other structure exterior members

90% of ASTM D1557 or 85% of ASTM

Outside structures under equipment support foundations *

95% of ASTM D1557 or 100% of ASTM

Granular fill under base slabs and building floor slabs on grade

75% relative density per ASTM D4253 and

ASTM D4254

Structural fill for over excavations 90% of ASTM D1557 or 95% of ASTM

*Granular fill or flowable fill may be substituted

310000 - 3 EARTHWORK

C. Density tests shall be taken at the frequency indicated in the table below and at all road and street crossings. The Engineer has the authority to require the Contractor to perform additional test locations based upon field conditions. The Engineer shall determine the exact location of all tests. Field tests for density and moisture content performed by the Contractor are for the sole purpose of assisting the Engineer in determining that the specified density is being obtained. All density testing for all backfill shall be performed using Standard Soil Proctor Curves provided by the Contractor. The Engineer has the authority and right to not accept backfill based on the results of these tests, but the results of the tests do not waive the responsibilities of the Contractor to ultimately guarantee the density and stability of the fill material. When test results indicate that compaction is not as specified, the material shall be removed, replaced, and recompacted to meet specification requirements at no expense to the Owner. Subsequent tests on recompacted areas shall be performed to determine conformance with specification requirements at the Contractor’s expense.

Materials Minimum Test Frequency

Fill and Backfill 1 per lift per 500 square feet

Subgrade 1 per lift per 2,500 square feet

Embankment 1 per lift per 500 cubic yards

Trenches 1 per lift per 150 linear feet

In no case shall the frequency exceed 200 feet horizontal and 1-foot vertical intervals.

D. Degree of compaction is a percentage of the maximum density obtained by the test procedure presented in ASTM Method D 698 or AASHTO-T99 (Standard Proctor) as a percent of laboratory maximum density.

E. Compaction Methods

1. Obtain compaction of backfill and embankment by mechanical means. Jetting or flooding is not permitted. Compact each layer with mechanical tampers. Do not place backfill at hydraulic structures until hydraulic testing has been completed. Do not place backfill against cantilevered walls until design strength of concrete has been reached. Do not place backfill against walls supported at the top by floor slabs until design strength has been reached.

2. Use light vibratory or hand tamping equipment adjacent to the wall. Take particular care compacting around pipe spools. Do not use heavy compaction equipment within a horizontal distance from the wall equal to the height of the wall.

1.06 SUBSURFACE INFORMATION

A. Unclassified.

1.07 PROTECTION AND REMOVAL OF UTILITY LINES

A. The presence of utilities is not guaranteed to be shown accurately or completely. On-site verification of utilities is required by the Contractor prior to excavations. Existing pipelines and electric cables that are shown on the Drawings or the locations of which are made known to the Contractor during on-site investigations prior to excavation operations, shall be protected from damage during excavation and backfilling, and if damaged shall be repaired by the Utility company at Contractor's expense.

PART 2 PRODUCTS

2.01 EARTH FILL MATERIALS

A. Fill material used for compacted impervious material shall consist of excess suitable impervious material obtained from on-site suitable excavations or suitable imported clay or silt material. Excess suitable material obtained from structure and trench excavation shall be used for the construction of fills and embankments. Additional material shall be provided as required under sub-section 2.03 - Borrow Material.

B. All material placed in fills and embankments shall be free from rocks, stones, or shale particles larger than 2 inches, frozen matter, brush, stumps, vegetation, logs, roots, debris, and organic

310000 - 4 EARTHWORK

or other deleterious materials. The material for fill shall have a liquid limit less than 45 percent and a plasticity index less than 25 as determined by ASTM D4318. No rocks or stones shall be placed in the upper 18 inches of any fill or embankment. Rocks or stones within the allowable size limit, incorporated in the remainder of fills and embankments, shall be distributed so that they do not congregate or interfere with proper compaction.

C. Fill material shall be limited to materials classified as SC, ML, and CL by the Unified Soils Classification.

D. Moisture content is to be maintained at a level sufficient to obtain the specified compaction.

2.02 EXCAVATED MATERIALS

A. Topsoil obtained by stripping and suitable for finish grading where arable soil is required shall be stockpiled in a location approved by the Owner or Engineer.

B. Excavated material approved for embankment, fill or backfill shall be placed in areas receiving embankment or stored for future use in a location approved by the Owner or Engineer.

2.03 BORROW MATERIAL

A. Where suitable materials, including topsoil, are not available in sufficient quantity from all required excavations under this contract, approved materials shall be obtained from approved sources off site at the Contractor's responsibility and expense. The necessary clearing and grubbing of borrow areas, disposal and removing of debris therefrom, the developing of sources including any access roads for hauling, the necessary right-of-way, and the satisfactory drainage of the borrow areas shall be considered as incidental items to borrow excavation.

B. Material obtained for fill shall be approved by the Engineer. Fill material shall be limited to materials specified in Section 2.01 - Earth Fill Materials.

2.04 TOPSOIL

A. Topsoil shall be the top few inches of field or pasture loam having a good supply of humus along with a high degree of fertility. Acceptable topsoil shall be a fertile, friable, and loamy soil of uniform quality with a loose crumbly structure, free from materials such as roots, hard clods, stiff clay, fill material, stone with any dimension greater than 1 inch, and similar impurities, relatively free from grass, roots, weeds, and other objectionable plant material.

B. Soils from ditch bottoms, drained ponds or eroded areas are not acceptable. Soils supporting growth of noxious weeds or undesirable weeds are not acceptable. Topsoil handled too wet or soggy are unacceptable.

2.05 DISPOSAL OF UNSUITABLE OR EXCESS MATERIAL

A. See construction plan notes for requirements for disposal of excess material.

2.06 CAPILLARY WATER BARRIER

A. Aggregate shall be clean, crushed, nonporous rock as graded below or sand-gravel:

1. Crushed, nonporous rock maximum particle size shall be ¾ inch and no particles shall be small enough to pass a No. 4 sieve.

2.07 BUILDING BACKFILL

A. Backfill within building shall be limited to materials classified as sc, ml and cl by mil-std-619.

PART 3 EXECUTION

3.01 SITE PREPARATION

A. Clearing and Grubbing:

1. The site of the work shall be cleared of all trash and debris which may be found on the site.

2. Grass and weeds shall be mowed to a height of not more than three inches and raked into windrows or piles.

310000 - 5 EARTHWORK

3. Trees noted to be removed shall be removed to a minimum depth of 2 feet 0 inches below the surface of the finished grade.

4. All materials accumulated by clearing and grubbing operations shall be disposed of at an offsite location to be provided by the Contractor.

B. Stripping:

1. Strip topsoil to a depth of not less than four inches from all areas to be covered by buildings, pavement, curb and gutter or other construction.

2. Material obtained by stripping shall be stockpiled for use in finish grading or areas not covered by construction.

3.02 ROCK EXCAVATION

A. The use of explosives is not permissible on this project

B. Excavation is considered unclassified for this project and the Contractor shall bid accordingly

3.03 EMBANKMENTS

A. Place all embankments to lines and grades shown. Areas to be covered with topsoil shall be underfilled so the finished lines conform after topsoil placement. Protect and maintain embankments during the course of construction. Replace all materials lost due to storm damage until permanent stabilization. Use materials obtained during excavation or imported materials. Do not use brush, sod, or other unsuitable materials in embankments.

B. No embankment shall be constructed on frozen material, nor shall organic material be used for embankment.

C. When an embankment is to be placed against a hillside or existing embankment whose slopes are steeper than 4:1; the existing slope shall be continuously benched in approximately 24 inches rises as the new fill is brought up on lifts as specified below. The material bladed out, the bottom of the area cut into, and the embankment material being placed shall be compacted to the required density.

D. In fill sections, place material in loose lifts not exceeding [6 inches], brought to within 2% to

+4% of optimum moisture content. Bring up each lift uniformly over the entire area being filled and compact each lift to its required density.

E. Maintain the proper moisture content in the uppermost layer. If placing of materials is interrupted and the material dries, bring to proper moisture content before resuming by sprinkling, cultivating, and rolling to the required compaction. Do not place or roll material during rainfall of sufficient intensity to materially increase the moisture content. If any material placed in embankment acquires a greater moisture content than is suitable for compaction, allow to dry or remove. If removed, recondition the new surface before placing new material.

Repair any irregularities caused by erosion by excavating, cultivating, filling, and compacting.

3.04 EXCAVATION FOR STRUCTURES

A. Structural excavation is the removal of all materials of whatever nature to approved structural subgrade and as necessary for construction of structures and foundations. Approved structural subgrade is that material which has been observed by the Engineer and upon which structural foundations or other materials may be placed. Locate limits of excavation for structures with formed vertical surfaces at least 5 feet from the extreme outside of the structure to the toe of the cut slope or at a 1:1 slope as detailed on the drawings, whichever is greater.

B. Design excavations in the proximity of adjacent structures so as to protect the structures from damage or undermining. Design and install shoring if necessary. Side slopes of excavation shall be only as steep as is safe for material to stand. Avoid unnecessary disturbance of adjacent ground.

C. Subgrade Preparation

1. Remove all existing “fill”, loose natural clays, sand, and compressible materials under proposed structures. Provide a relatively smooth subgrade.

2. The exposed bottoms of excavations shall consist of undisturbed native material.

310000 - 6 EARTHWORK

3. Where excavation is inadvertently carried beyond the design elevation or approved structural subgrade, adjust the construction as directed to meet the structural requirements. Over excavations shall be backfilled with graded structural fill compacted to the required density, or adjust the construction as required to meet the structural requirements as approved by the Owner’s Representative.

3.05 FILL WITHIN STRUCTURES

A. Approved fill shall be placed at optimum moisture content in lifts of not more than 6 inches loose lift and compacted to at least 95 percent of Laboratory Maximum Density. Fill shall be placed up to the bottom of the structural floor slabs, with allowance for capillary water barrier (gravel sub-base) and/or concrete mud mat as specified or shown on the drawings, to the elevations shown.

3.06 CAPILLARY WATER BARRIER

A. Subgrade under floor slab shall be finished off smooth after the required density as specified above is achieved to the proper elevation.

B. Capillary water barrier shall be placed directly on the subgrade and compacted with a minimum of two passes of a plate-type vibratory compactor.

C. The minimum compacted thickness of the capillary water barrier shall be 4-inches unless noted otherwise in the Drawings.

3.07 BACKFILL FOR STRUCTURE FOUNDATION WALLS, GRADE BEAMS AND FOOTINGS

A. Backfill shall be brought up on each side of the foundation wall concurrently. After foundation walls, grade beams and footings have cured, forms have been removed, and all trash has been removed, backfill shall be placed at optimum moisture content in lifts of not more than 6 inches loose lifts and compacted to at least 95 percent of Laboratory Maximum Density.

B. Backfill for areas not to be paved shall be placed to within 6 inches of the finished grade. The top 6 inches shall be topsoil.

3.08 AREA GRADING

A. Under pavement, pads and sidewalks, excavate and fill to grades and contours shown on the

Drawings, making allowance for thickness of pavement, pads and sidewalks.

B. General Fill:

1. Excavate and fill to grades and contours shown on the Drawings making allowance for the placing of a minimum of 6 inches of topsoil.

2. Areas receiving embankment or topsoil shall be scarified to a depth of 6 inches and recompacted at optimum moisture content to at least 90 percent of Laboratory Maximum Density.

3. Fill material shall be approved earth free of stones larger than 6 inches diameter and suitable for compaction. Fill material shall be placed at optimum moisture content in lifts not to exceed 6 inches loose lift and compacted to at least 90 percent of Laboratory Maximum Density.

4. Topsoil shall be placed in a 6 inch lift and not compacted.

3.09 SUBGRADE PREPARATION FOR PAVEMENT, PADS, SIDEWALKS AND CURBS

A. Subgrade preparation shall extend one (1) foot beyond the back of curb line or edge of pavement, whichever is appropriate. Sidewalk replacement subgrade preparation shall be limited to width of sidewalk and form limits.

B. The subgrade shall be free of organic material, trash and debris, and rocks larger than 3 inches in diameter. Subgrade shall not be frozen while construction is in progress.

C. Scarify the upper six (6) inches of the subgrade and compact to 95% of the maximum density at optimum moisture, plus or minus 3%, in accordance with AASHTO T99 (Standard Proctor).

The subgrade material shall be properly “worked” and installed to provide a stable road base, absent of shrinkage or swell potential. The subgrade shall be maintained within the proper

310000 - 7 EARTHWORK

moisture content limits until the curb & gutter and pavement is placed. Mechanical tamping may be utilized or required for certain areas. If the subgrade contains excess moisture the subgrade shall be aerated or removed and replaced with new material so that moisture limits fall within limits of the standard proctor. The prepared subgrade shall support the weight of vehicles and equipment without producing ruts in the surface, and shall be maintained until pavement has been placed thereon. The Engineer may require proof rolling of the subgrade surface. Proof rolling shall be provided at no additional cost to the Owner.

D. The elevations and cross sections of the subgrade surface shall be thoroughly checked immediately prior to the pavement placement. All high and low places shall be removed and filled with suitable material and mechanically tamped. All subgrades shall be checked not less than 100 feet in advance of paving operation. Any damage or irregularities to the subgrade during paving operations shall be repaired prior to placing of additional pavement.

3.10 CONTROL OF WATER

A. Surface Water:

1. Surface water shall be diverted to prevent entry to trenches and excavations for structures.

2. In the event surface water does accumulate in trenches and other excavations, the excavations shall be dewatered as necessary to permit the proper execution of the work.

Dewatering shall be provided at no additional cost to the Owner.

B. Ground Water: Where ground water is encountered, trenches and other excavations shall be dewatered as necessary to permit the proper execution of the work.

1. The Contractor shall provide pumps, well points, and other appurtenant equipment necessary to remove and maintain water at such a level as to permit construction in a dry condition as specified except where authorized tremie concrete construction Work is shown or permitted. The groundwater level shall be controlled so as to permit the placing of sewer lines and structure foundations, curing of concrete, and the maintenance of supporting foundations and adjacent Work and structures. The dewatering system and points of discharge shall be subject to permitting, reviews, and acceptance by the Engineer before installation. Disposal of water to any surface water body will require silt screens.

2. The Contractor shall use dewatering systems that include automatic starting devices, and standby pumps that will ensure continuous dewatering in the event of an outage of one or more pumps. He shall be totally responsible for protecting structures from flotation until final acceptance of the Work. The Contractor shall also modify the dewatering system during the course of construction to satisfy faults, legitimate complaints, or legal requirements.

3.11 FINISH GRADING

A. After construction is completed, areas requiring finish grading shall be cleared of all building materials, equipment and debris and a minimum depth of 6 inches of topsoil placed. The 6 inches of topsoil is included in and not added to the final grade indicated on the plans.

Surfaces shall be smooth and suitable for planting or sodding.

3.12 PROTECTION

A. Subgrade shall be repaired from action of the elements or others. Any settlement or erosion that occurs prior to the placing of the pavement thereon, shall be repaired and the specific lines, grades and cross section re-established. Any subgrade that has become unacceptable shall be reworked as necessary to restore the subgrade to shape, tolerance, density, and moisture content range for such density, immediately prior to the placing of the pavement.

The Contractor shall protect all existing improvements from damage resulting from his subgrade operation. Any improvements damaged shall be repaired or replaced at no additional expense to the Owner.

END OF SECTION

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312320 - 1 BIOSOLIDS REMOVAL

SECTION 312320

LAGOON CLOSURE

PART 1 GENERAL

1.01 RELATED WORK SPECIFIED ELSEWHERE

A. 310000 Earthwork

B. 329219 Seeding

1.02 REFERENCES

A. State of Missouri:

1. University of Missouri Extension Water Quality Guide Sheets for Biosolids – WQ 423 through 434 and WQ 449.

2. Missouri Clean Water Law

3. Missouri Clean Water Commission Rules

4. Missouri Department of Natural Resources Wastewater Treatment Plant Closure Fact Sheet - PUB2568

5. Standard Conditions for NPDES Permits issued by MDNR Missouri Clean Water Commission Part III, revised August 1, 2019

B. United States Environmental Protection Agency (EPA), 40 CFR Part 503

C. NPDES Permits issued for the lagoon facility.

1.03 GENERAL

A. Definitions:

1. Lagoon closure is defined as all work necessary to properly remove wastewater biosolids from the existing lagoon cell or incorporate biosolids into soil following reference guidance and perform all regulatory paperwork submittals and documentation.

B. Based on the lagoon closure plan information, biosolids shall be mixed with soil at a 1:1 ratio by The Contractor shall land-apply wastewater biosolids at the appropriate agronomic rates in a manner acceptable to the Missouri Department of Natural Resources (MDNR) and in accordance with state and federal laws and regulations.

C. Laws and ordinances regulating water pollution control, health and safety measures shall be strictly observed.

1.04 PROTECTION OF UTILITY LINES

A. Existing utilities including pipelines and/or electric cables shall be protected from damage during the work, and if damaged shall be repaired by the Contractor or Utility company at Contractor's expense.

PART 2 PRODUCTS (NOT USED)

PART 3 EXECUTION

3.01 GENERAL

A. The biosolids shall be shall be incorporated with soil from the lagoon berms as indicated in the lagoon closure plan and in accordance with Missouri Department of Natural Resources publication 2568 and Standard Conditions for NPDES Permits issued by MDNR Missouri Clean Water Commission Part III, revised August 1, 2019.

B. Biosolids shall be contained within the lagoon regrading site. The contractor shall ensure than no biosolids leave the site. As indicated in the proposed grading plan, final contours may be adjusted to arrive at a balanced site depending on actual swell and shrinkage factors experienced during construction. If the biosolids are not contained within the boundaries of the approved site, the Contractor shall be responsible for all costs of clean up and remediation.

3.02 PERMITTING AND SEQUENCE OF WORK

A. Contractor shall follow sequence of work and construction schedule submittal requirements of the project’s specifications.

312320 - 2 BIOSOLIDS REMOVAL

B. Note that it shall be the contractor’s full responsibility to comply with all state and federal regulations, which includes paperwork and documentation. The Contractor shall be fully responsible for any fines incurred. If fines are assessed to the City as the result of failure to receive adequate approval from MDNR or other applicable regulatory authorities, the Contractor shall be fully financially liable for paying those fines on behalf of the Owner. This section shall not be considered all-inclusive, but rather a guidance that must be addressed at a minimum. The general permitting and work sequence follows:

1. Contractor shall comply with to Part III of Standard Conditions for NPDES Permits issued by MDNR on August 1, 2019.

2. Contractor shall comply with Publication 2568 issued by MDNR.

a. The wastewater in the lagoons must be handled in accordance with Publication 2568 issued by MDNR. The wastewater may be drained into the into the collection system if the volume of water is in excess of what can be mixed in with the sludge contained in the lagoons. No water shall be discharged from the lagoons during lagoon closure.

1) Do not place biosolids in locations where it is reasonably certain that pollutants will be transported into waters of the state during stormwater runoff events. The biosolids shall be contained within the lagoon site being cleaned and closed and the land application sites. If the biosolids is not contained the Contractor shall be responsible for all costs of clean up and remediation.

3. Contractor shall fully construct all proposed collection system improvements and tie over the lagoon’s influent line prior to lagoon closure.

4. All influent piping and structures shall be fully removed prior to lagoon regrading.

5. All sludge remaining in the lagoon cell shall be incorporated with soil from the berms and site not to exceed a 1:1 ratio (sludge:soil). Lagoon berms shall be fully demolished, and the site shall be graded and contain >70% vegetative density over 100% of the site to avoid ponding of storm water and provide adequate surface water drainage without creating erosion.

329219 - 1 SEEDING

SECTION 329219

SEEDING

PART 1 GENERAL

1.01 SUMMARY

A. This section governs the furnishing of all labor, equipment, tools and materials, and the performance of all work for final seeding of lawns and non-maintained vegetation areas, disturbed by construction operations, and removal of rocks, debris and other foreign matter not suitable for a seed bed.

B. Refer to SWPPP and Land Disturbance permit for temporary seeding and other erosion control products usage in conjunction with seeding and mulching.

1.02 SUBMITTALS

A. Submit shop drawings in accordance with the project’s submittal requirements.

B. Provide a mechanically printed seed mixture tag showing percentage of seed mix, year of production, net weight, germination rate, purity, date of packaging, and location of origin.

C. Hydro mulch material, rolled erosion control product (RECP), and other manufactured products.

D. Fertilizer: certification of analysis from a certified fertilizer dealer, and straw to be inspected in the field prior to application.

PART 2 PRODUCTS

2.01 MULCH

A. Oat, rye or wheat straw, that are reasonably free from weeds, foreign matter detrimental to plant life, and in dry condition. Supply straw mulch per SUDAS.

B. Hydromulch shall consist of fiber mulch. Fiber mulch shall be derived from wood chips or recycled paper products. The mulch shall be free of chemicals and growth inhibitors. Mulch shall contain a green dye to assist in metering a uniform application. Supply mulch for hydraulic seeding per SUDAS.

C. Tackifier (soil binder) shall be a physllium based, organic compound derived from natural plant sources. Binder shall consist of an active hydrophilic colloid, which will hydrate with water and, upon drying after application, will tack hydrospray mix to soil surface. Binder shall be nontoxic and contain no growth or germination inhibitors. Supply tackifier per SUDAS.

D. Sticking Agent and Inoculant for Legumes per SUDAS.

2.02 MANUFACTURED BMP PRODUCTS

A. Rolled Erosion Control Product (RECP) may be used for temporary erosion control to hold seed until the newly seeded area is stabilized. The RECP shall be 100% agricultural straw stitched with degradable thread to a single UV accelerated photodegradable polypropylene netting, similar to North American Green S-75 on embankments and DS-75 in lawn areas.

B. Other forms of RECP may be proposed, such as Bonded Fiber Matrix (BFM) and Turf Reinforcement Mat (TRM).

2.03 FERTILIZER

A. A commercial granular fertilizer, grade 13-13-13 total nitrogen (N), available phosphoric acid (P205), and soluble potash (K20), delivered in sealed bags and bearing the manufacturer’s “Guaranteed Statement of Analysis.” Apply at rate determined by soil fertility analysis submittal.

2.04 GRASS SEED

A. Deliver to site in original containers showing analysis of seed mixture, percentage of pure live seed (% germination and % purity), year of production, net weight, date of packaging, and location of origin.

B. Seed mix per SUDAS Seed Mixtures.

329219 - 2 SEEDING

2.05 TOPSOIL

A. Topsoil furnished by the CONTRACTOR shall consist of a natural friable surface soil without admixtures of undesirable subsoil, refuse, or foreign materials. It shall be reasonably free from roots, hard clay, and coarse gravel, stones larger than one inch in any dimension, noxious weeds, grass, brush, sticks, stubble or other material which would be detrimental to the proper development of vegetative growth.

PART 3 EXECUTION

3.01 TEMPORARY SEEDING

A. Provide temporary seeding in areas prone to erosion and sediment transport.

B. Install RECP in areas that are steeper than 6 (horiz): 1 (vert) according to manufacturer’s recommended method.

C. Temporary Seed Mix: Apply the following temporary grass seed mix at the specified rate per acre.

1.

a. Spring Planting

Location Species Pounds per Acre

Established Lawns Oat or Rye 60

Non-Lawn Areas Oat, Rye or Red Clover 60

b. Fall Planting

Location Species Pounds per Acre

Established Lawns Winter Wheat/Rye 60

Non-Lawn Areas Winter Wheat/Winter Rye 60

2. Fertilizing

a. Apply fertilizer at a rate of 150 pounds per acre.

3. Reseeding

a. Reseed areas within 30 days of initial seeding where no stand of grass has occurred.

3.02 FINAL SEEDING

A. GENERAL

1. Planting Season: March 1 - April 30 or August 23 - October 16

2. Mulched on the same day.

3. Proceed with planting only when existing and forecasted weather conditions permit. Do not sow immediately following rain, when ground is too dry, or during windy periods.

4. Areas to be seeded as a dormant seeding must be protected from erosion over winter by mulching.

B. SURFACE PREPARATION

1. Scarify subsoil to a depth of 6 inches by means of blading, chisel plowing, discing, rock picking, harrowing or any other operation necessary to return the ground surface as nearly as practical to its original condition. Remove foreign materials, plants, roots, stones one inch and larger, and debris from the disturbed area. Add suitable material to areas that settled excessively. Spread six inches of topsoil over the area. Rake until the surface is smooth and level with the surrounding ground.

2. Topsoil: see 2.05.

3. Seedbed preparation, seed preparation, seed application, and seed mulching per SUDAS.

3.03 FERTILIZING

A. Apply fertilizer at a rate of 300 pounds per acre. Work the fertilizer into the topsoil.

B. Apply after smooth raking of topsoil and prior to roller compaction.

329219 - 3 SEEDING

C. Mix thoroughly into topsoil.

D. lightly water to aid the dissipation of fertilizer.

E. If seeding with the drilling method, include a fertilizer attachment on the drill which allows the placement of fertilizer in a band on or near the drill row.

F. If seeding by means of a hydraulic seeder, include the required amount of fertilizer to be mixed with the seed, cellulose fiber mulch and water and applied in the seeding operation.

3.04 PERMANENT SEEDING

A. Apply seed evenly in two intersecting directions using mechanical power drills or seeders.

B. Roll seeded area with cultipacker type roller at right angle to slopes not exceeding 112 lbs.

C. Grass Seed Mix:

Species % of Mix PLS per Acre

K31 Fescue 80 340

Perennial Rye 20 60

Total 100 300

3.05 SEEDING BY DRILLING

A. The specified seed or seed mixture shall be drilled in uniformly using a grass drill equipped with individually mounted adjustable spring loaded, double-disk furrow openers fitted with depth control bands and packer wheels.

B. The depth of control bands shall be of a size to provide final planting of not more than the optimum depth.

C. Packer wheels shall have adjustable spring tension and be mounted individually on each furrow opener or be mounted independently with a press wheel situated to follow directly behind each opener

3.06 MULCHING

A. Immediately following seeding and compacting, apply mulch to a thickness of not less than 1/8 inches (approximately 2 tons per acre). Approximately ten (10) percent of the soil surface shall be visible through the mulch blanket prior to mulch tiller (punching) operation. Maintain clearance from shrubs and trees.

B. The mulching material shall be punched into the soil so that it is partially covered. The punching operation shall be performed longitudinally with a mulch tiller consisting of a series of dull, flat disks with notched or cutout edges. The disks shall be approximately 20 inches in diameter and 1/4-inch thick, shall be spaced approximately 8-inches apart, and shall be fitted with scrapers.

The working width of the tiller shall not exceed six (6) feet per member, but may be operated in gangs of not over 3 members each (18 feet total width).

C. Care shall be exercised to obtain a reasonably even distribution of mulch partially incorporated into the soil. It may be necessary to use weights or hydraulic pressure to insure that the mulch is punched into the soil adequately.

D. On slopes too steep for disking, the mulching shall be “patted” with forks as it is placed on the slopes. Soil from the top of slope areas shall be placed by hand methods on the mulching material to reduce loss due to wind. Non-friable soil should be placed over the upper 1/3 of slopes and should average approximately one cubic foot of soil to each 25 square feet of area.

E. When mulch is applied with a straw blower, it may be necessary to remove cutting knives to prevent cutting mulch too short.

F. The Contractor shall arrange his work so that the mulch can be placed and punched immediately after each slope area is seeded. Mulching operations shall not lag behind seeding operations more than 24 hours during clear weather. When rain is threatening, the Contractor

329219 - 4 SEEDING

shall make every effort to mulch areas the same day as seeded. Mulch shall be replaced before seeds germinate when re-mulching wind or rain damaged areas.

G. Apply potable water with a fine spray immediately after each area has been mulched

3.07 HYDROSEEDING

A. Contractor may propose hydroseeding upon approval of the Engineer and Owner. Contractor shall submit a hydroseeding plan and product data.

B. The hydrospray shall be applied in the form of a slurry consisting of cellulose fiber, seed, stabilizer additives, tackifier, commercial fertilizer, and water. When hydraulically sprayed on the soil surface, the mix shall form a blotter-like ground cover impregnated uniformly with seed and fertilizer and shall allow moisture to percolate to the underlying soil.

C. Prior to hydroseeding, the site shall be measured and staked to identify the areas to be sprayed by each truckload of mix.

D. Hydraulic equipment used for the application of the slurry shall be a 1500-gallon capacity agitator-mixer. This equipment shall have a built-in agitation system and operating capacity sufficient to agitate, suspend and homogeneously mix a slurry containing not less than 40 pounds of fiber mulch, plus a combined total of 15 pounds of fertilizer solids for each 100 gallons of water or per the submitted soil fertility analysis, whichever is less.

E. The slurry distribution hose lines shall be large enough to prevent stoppage and shall be equipped with a set of hydraulic spray nozzles which will provide a continuous non-fluctuating discharge. Slurry tank shall be mounted on a traveling unit.

F. Seeding rate to be hydroseeded shall be increased by 50 percent, G. Hydroseed Slurry Mix

PRODUCT APPLICATION RATE (pound per acre)

Seed Mix 150% of grass seeding rate

Fiber Mulch 2000

Slow-Release Fertilizer: Up to this amount per soil fertility test.

20-10-5 200

0-18-0 Single Super-Phosphate 150

Argricultural Gypsum 500

Soil Sulfur 100

Soil Binder 100

3.08 HYDROMULCHING

A. Hydromulching application shall be similar to hydroseeding as far as equipment and procedures.

B. Hydromulch slurry mix shall be as follows:

1. Fiber Mulch: 200 lbs/acre.

2. Soil Binder: 50 lbs/acre. Mix soil binder at the rate of 30 pounds of concentrate mixed with 1,500 gallons of water.

3.09 MAINTENANCE

A. Reseed damaged grass areas showing root growth failure, deterioration, bare or thin spots and eroded areas.

B. Contractor shall be responsible for controlling the growth of weeds in areas disturbed during construction until all seeding work has been completed.

C. The Contractor shall re-landscape and properly reseed all areas damaged by their operations.

Trenches which have settled within the warranty period, and which were previously seeded, shall be reshaped and reseeded by the Contractor at the Contractor's expense.