Public Notice REQUEST FOR QUOTES Town of Woodstock Downtown Parking Lot Improvement Project Landscape Material June 22, 2018 ADDENDUM NO.: One (1) TO ALL PROSPECTIVE BIDDERS: PLEASE BE ADVISED OF THE FOLLOWING ADDITIONS, DELETIONS AND/OR CHANGES: 1. What are the material specifications? a. Please see attached.
SECTION 329100 SOIL PREPARATION PART 1 - GENERAL 1.1 SUMMARY A. The work in this section includes, but is not limited to, the following: 1. Storage of planting soil 2. Testing of planting soil and compost 3. Installation of planting soil and amendments 4. Compacting and grading of planting soil 1.2 RELATED DOCUMENTS AND REFERENCES A. Related Sections: 1. Section 329200 - Sodding 2. Section 329300 - Plants B. References: 1. The following references and standards are use herein and shall mean: a. ASTM: American Society of Testing Materials. b. USDA: United States Department of Agriculture c. U.S. Department of Agriculture, Natural Resources Conservation Service, 2003. National Soil Survey Handbook, title 430-VI. Available Online: http://soils.usda.gov/technical/handbook/ 1.3 SUBMITTALS A. Product Data: Submit manufacturer product data and literature describing all products required by this section for approval. Provide submittal twelve weeks before the installation of planting soil. B. Material Certificates: Submit material certificates for all natural and bulk material indicating that the material meets the requirements of the specification for approval. Provide submittal twelve weeks before the installation of the planting soil. C. Samples: Submit samples of each product and material where required by the specification for approval. Label samples to indicate product, specification number, characteristics, and locations in the Work. Samples will be reviewed for appearance only. Compliance with all other requirements is the exclusive responsibility of the contractor. Delivered materials shall closely match the samples. 329100-1
1. Submit a two gallon sample of planting soil and a one gallon sample of Compost. The number of samples shall be as required for each material. a. Samples should be labeled to include the location of the source of the material. b. Samples of all products and Planting soil shall be submitted two weeks before the installation of Planting Soil. 2. Submit soil test analysis report for sample of planting soil from an approved soil-testing laboratory. a. The soil testing laboratory shall be approved in advance and have a minimum of 5 years experience with the test protocols of the United States Golf Association - Green Section. b. Provide a particle size analysis including the following gradient of mineral content: USDA Designation Gravel Very Coarse Sand Coarse Sand Medium Sand Fine Sand Very Fine Sand Silt Clay Size in mm. +2mm 1-2 mm 0.5-1 mm 0.25-0.5 mm 0.1-0.25 mm 0.05-0.1 mm 0.002-0.05 mm minus 0.002 mm c. Provide a chemical analysis including the following: 1) ph and Buffer ph 2) Percent organic contents by over dried weight 3) Nutrient levels by parts per million including Nitrogen, Phosphorous, Potassium, Magnesium, Manganese, Iron, Zinc, and Calcium. Nutrient tests shall include the testing laboratory recommendations for supplemental additions to the planting soil. 4) Soluble salt by electrical conductivity of a 1:2 soil water sample measured in Milliohm per cm. 5) Cation Exchange Capacity (CEC) d. All testing will be at the expense of the Contractor. The Landscape Architect may request additional Planting soil tests on different mix component ratios in order to attain results that more closely meet the mix requirements. D. Submit the manufacturers particle size analysis, ph and certificate of length of composting period for all compost for approval. E. Testing of soils shall be performed by: CLC Labs 329100-2
325 Venture Drive Westerville, OH 43081 614.888.1663 1.4 SOIL INSTALLATION MOCK-UPS A. Mock-up prior to the installation of General Planting Soil: Construct a mock-up of planting soil and installation of compost at the site. The installation of the mock-up shall be in the presence of the Landscape Architect. B. Mock-up prior to the installation of Bioswale Planting Soil: Construct a mock-up of bioswale planting soil and installation of compost at the site. The installation of the mock-up shall be in the presence of the Landscape Architect. C. The mock-up area may remain as part of the installed work at the end of the project. 1.5 SEQUENCING AND SCHEDULING A. General: Prior to the start of Work, prepare a detailed schedule of the work for coordination with the other trades. B. Schedule the installation of planting soil after the area is no longer required for use by other trades and work. C. Schedule all utility installations prior to beginning work in this section. 1.6 QUALITY ASSURANCE A. Contractor is solely responsible for quality control of the Work. B. The installer shall be a firm having at least 5 years of successful experience of a scope similar to that required for the Work, including the preparation, mixing and installation of custom planting soils in urban locations. C. Comply with applicable requirements of the laws, codes, ordinances and regulations of federal, State and municipal authorities having jurisdiction. Obtain necessary approvals from all such authorities. D. Comply with all requirements for control of silt and sediment during soil installation work as indicated in the contract documents. 1.7 DELIVERY, STORAGE, AND HANDLING A. Weather: Do not mix, deliver or place soils in frozen, wet, or muddy conditions. 329100-3
B. Protect soil stockpiles from rain and washing that can separate fines and coarse material. Cover stockpiles with plastic sheeting at the end of each work day. C. Protect planting soil stock piles from contamination by chemicals, dust and debris that may be detrimental to plants or soil drainage. D. Imported Topsoil shall be delivered at or near optimum compaction moisture content as determined by AASHTO T 99 (ASTM D 698). Do not deliver or place materials in an excessively moist condition (beyond 2 percent above optimum compaction moisture content as determined by AASHTO T 99 (ASTM D 698). 1.8 SITE CONDITIONS A. It is the responsibility of the Contractor to be aware of all surface and sub-surface conditions, and to report any circumstances that will negatively impact soil drainage. Do not proceed with work until unsatisfactory conditions have been corrected. Proceeding with work constitutes acceptance of existing or corrected conditions. 1.9 WORKING AROUND UTILITIES A. Carefully examine the civil, record, and survey drawings to become familiar with the existing underground conditions before digging. B. Determine location of underground utilities and perform work in a manner that will avoid possible damage. Hand excavate, as required. Maintain grade stakes set by others until parties concerned mutually agree upon removal. The Contractor is responsible for knowing the location and avoiding utilities. PART 2 - PRODUCTS 2.1 TOPSOIL A. Topsoil salvaged from onsite within the top 8" of soil prior to the construction. B. If topsoil salvaged from onsite is unavailable, use a topsoil that meets the following criteria: 1. Fertile, friable, loamy topsoil, containing 3 to 5 percent by weight compost; free from subsoil, refuse, roots, heavy or stiff clay, stones larger than 1 inch, noxious seeds, sticks, brush, litter, and other deleterious substances; suitable for the germination of seeds and the support of vegetative growth. The ph value shall be between 6 and 7. All soil mixes shall be evenly mixed with required amendments. 2. Soil Texture: Sandy clay loam with clay content between 10 and 15%, and sand content between 60 and 65% with coarse to medium sand in excess of 30% 329100-4
C. Provide a minimum of 1 soil test from samples obtained throughout the source stockpile that represents the range of the soil available at the source. Based on the soil analysis and using mechanical means, blend the required soil amendments with the topsoil on-site. D. Provide a two gallon sample from each topsoil source with soil testing results. The sample shall be a mixture of the random samples taken around the source stockpile or field. 2.2 ORGANIC COMPOST A. Organic blended material composted sufficiently to break down all woody fibers, seeds and leaf structures, free of toxic and non-compost. Source material shall be straw, hardwood bark fines and organic material designed to produce a compost high in fungal material. Compost shall be commercially prepared compost and meet US Compost Council STA/TMECC criteria or equal for Class I or II stable, mature product. Submit one-pound sample and suppliers literature certifying STA compliance for approval. Compost made from primarily green yard waste shall not be acceptable. B. Provide a one gallon sample with manufacturer s literature and material certification that the product meets the requirements. 2.3 CHEMICAL ADDITIVES A. Chemicals materials designed to increase soil fertility. All material shall be delivered to the site in unopened containers and stored in a dry enclosed space suitable for the material and meeting all environmental regulations. Biological additives shall be protected from extreme cold and heat. All products shall be freshly manufactured and dated for the season in which the products are to be used. 1. Fertilizer for planting shall be an organic fertilizer. Fertilizer selections shall be based on the recommendations of the soil tests. Specialty fertilizers and additives noted below shall be used where required by the specifications prior to the use of any additional fertilizer. Submit manufacturer s product literature. 2. High quality agricultural ground limestone product to have a calcium carbonate equivalent (CCE) of 100. Limestone selections shall be based on the recommendations of the soil test. Submit manufacturer s product literature. 3. Rock Phosphate, slow release, or approved equal. Submit manufacturer s product data for approval. 2.4 COARSE SAND A. Coarse concrete sand, ASTM C-33 Fine Aggregate, with Fines Modules Index of 2.8 and 3.2. 1. Sands shall be clean, sharp, natural sands free of limestone, shale and slate particles. Sand ph shall be between 5.5 and 7.0. 2. Provide the following particle size distribution: 329100-5
Sieve Size: Percent Passing 3/8" (9.5mm) 100 No 4 (4.75mm) 95-100 No 8 (2.36mm) 80-100 No 16(1.18mm) 50-85 No30 (.60mm) 25-60 No50 (.30mm) 10-30 No100 (.15mm) 2-10 B. Provide a one gallon sample with manufacturer s literature and material certification that the product meets the requirements. 2.5 PLANTING MIX - Bioswale Planting Soil Mix A. A uniformly blended mixture of coarse sand, salvaged topsoil and organic matter, mixed to the following proportion: Material % by volume Coarse sand 60% Topsoil* 25% Organic matter 15% B. Planting mix shall be evenly mixed with required amendments. C. Adjust the final mix ph to 5.5-7.0. D. Do not work planting medium when the moisture content is too high. Causing excessive compaction. Aerate components until moisture content is uniformly reduced as necessary to achieve optimum compaction. PART 3 - EXECUTION 3.1 SITE EXAMINATION A. Examine the surface grades and soil conditions for any circumstances that might be detrimental to soil drainage, such as uneven sub grades and waterproofing that may hold or pond water, deposits of construction-related waste or soil contamination, storage of material or equipment, soil compaction or poor drainage. Confirm that all utility work and installation of planter drainage has been completed and tested. Examine the grading, verify all elevations. Confirm that all other work in the area of planting soil installation is completed. Notify the Landscape Architect in writing of any unsatisfactory conditions. 3.2 COORDINATION WITH PROJECT WORK A. The Contractor shall coordinate with all other work that may impact the completion of the work. Protect installed planting soil from compaction or contamination by other trades. 329100-6
B. Assure that all sediment control required by the project documents is in place during the installation of planting soil. Provide additional sediment control to retain planting soil within the project limits as needed. C. Irrigation: Irrigation lines and heads encountered during the planting soil installation process shall be avoided. When unavoidable, irrigation lines shall be traced to their nearest connection and removed. The open end of the irrigation line shall be capped to prevent clogging. The site of a disconnected irrigation line shall be flagged after excavated soil has been backfilled. 3.3 SOIL TESTING A. General Planting Soil and Bioswale Planting Soil: 1. Prepare a minimum of 1 sample of General Planting Soil and Bioswale Planting Soil. Submit samples for approval. B. This specification is based on the assumption that the soil products to be provided are natural and will vary in quality from location to location within the soil sources, and that mixing of soil will result in variety within the mix. The contractor is expected to provide samples that represent the range of product quality to be provided. C. The contractor shall submit planting soil with test results for evaluation. Multiple rounds of testing and evaluations may be required before an approved planting soil can be determined. For each test mix, submit both representative samples of the material along with the test results. D. Schedule the Planting soil testing phase such that all testing and mix design is completed a minimum of three weeks prior to the installation of planting soils. 3.4 SITE PREPARATION A. Excavate to the proposed subgrade. Maintain all required angles of repose of the adjacent materials as shown on the drawings. Do not over excavate compacted subgrades of adjacent pavement or structures. Remove all construction debris and material including any temporary construction roads. B. Confirm that the sub grade is at the proper elevation and compacted as required. Subgrade elevations shall slope parallel to the finished grade and/or toward the subsurface drain lines as shown on the drawings. C. Do not proceed with the installation of planting soil, until all utility work in the area has been installed. D. Protect adjacent walls, walks and utilities from damage or staining by the soil. Use 1/2" plywood and or plastic sheeting as directed to cover existing concrete, metal and masonry work and other items as directed during the progress of the work. 1. Clean up any soil or dirt spilled on any paved surface, including at the end of each working day. 329100-7
2. Any damage to the paving or architectural work shall be repaired by the Contractor at the Contractor s expense. 3.5 PLANTING SOIL INSTALLATION A. Prior to installing any planting soil, notify the Landscape Architect shall approve the condition of the sub grade and the previously installed sub grade preparation and the installation of subsurface drainage material. B. In areas of soil installation, till the planting soil into the top layer of subgrade. 1. Scarify or till the surface of the subgrade to a depth of 2-3" with a back hoe or other suitable device. 2. Spread a layer of the specified planting soil 2-3" deep over the subgrade. Thoroughly till the planting soil and the subgrade together. 3. Immediately install the remaining planting soil in accordance with the following specifications. Protect the tilled area from traffic. DO NOT allow the tilled subgrade to become compacted. 4. In the event that the tilled area becomes overly compacted, till the area again prior to installing the planting soil. C. Install the remaining planting soil in 8"-10" lifts to the required depths D. The depths and grades shown on the drawings are the final grades after settlement and shrinkage of the organic material. The contractor shall install the planting soil at a higher level to anticipate this reduction of planting soil volume depending predicted settling properties for each type of planting soil as indicated on the drawing 3.6 PLANTING SOIL COMPACTION A. Compact each 8-10 lift with mechanical compaction equipment to the compaction rates of 80% Proctor density. This is roughly 1-2 passes with a plate compactor. B. Maintain moisture conditions within the planting soils during installation to allow for satisfactory compaction. Suspend installation operations if the planting soil becomes wet. Do not place planting soils on wet or frozen sub grade C. Provide adequate equipment to achieve consistent and uniform compaction of the planting soils. Use the smallest equipment that can reasonably perform the task of spreading and compaction. 3.7 PROTECTION A. Protect planting soil from compaction and contamination by dust, debris, and any toxic material harmful to plants or humans after placement. Any area, which becomes compacted, shall be tilled to a depth of 6". Any uneven or settled areas shall be filled and re graded. 329100-8
B. Phase the installation of the planting soil such that equipment does not have to travel over already installed planting soil. 3.8 FINE GRADING PLANTING SOIL A. The Landscape Architect shall view all rough grading prior to the installation of Compost, fine grading, planting, and mulching. B. Grade the finish surface of all planted areas to meet the grades shown on the drawings after the twelve-month settling period. Allow the finished grades to remain 1-2" higher than the grades on the grading plan to anticipate settlement over the first year. Set grades at time of installation high enough relative to the type of planting soil and settlement anticipated so that the planting soil will be at the correct grades after the settlement period. At the end of the planting warranty period, if grades have settled greater than 5% of the soil depth below the grades shown on the drawings, reset the grades to the final grades shown on the grading plan. C. Adjust the finish grades to meet field conditions as directed. D. Provide for positive drainage from all areas toward the existing inlets, drainage structures and or the edges of planting beds. Adjust grades as directed to reflect actual constructed field conditions of paving, wall and inlet elevations. Notify the Landscape Architect in the event that conditions make it impossible to achieve positive drainage. E. Provide smooth transitions between slopes of different gradients and direction. Modify the grade so that the finish grade is flush with all paving surfaces or as directed by the drawings. F. Fill all dips and remove any bumps in the overall plane of the slope. 1. The tolerance for dips and bumps in shrub and ground cover planting areas shall be a 1" deviation from the plane in 10'. G. Restore all grades after the installation of plants. 3.9 INSTALLATION OF COMPOST IN AREAS OF PLANTING SOIL WITH MULCH A. After the specified planting soil is installed, and just prior to the installation of Mulch and tree, shrub or groundcover plantings, spread 4 of Compost over the area designated on the plans and details and roto-till into the top 6" of the planting soil to create a 10" modified rootzone. 3.10 CLEAN-UP A. During installation, keep pavements clean and work area in an orderly condition. B. Keep the site free of garbage at all times. Immediately dispose of wrappings or waste materials associated with products necessary for the completion of the work. C. All garbage shall be kept in a central collection container. Do not bury garbage in back-fill. 329100-9
D. Once installation is complete, remove any excess soil from pavements or embedded fixtures. 3.11 PROTECTION DURING CONSTRUCTION A. The Contractor shall protect landscape work and materials from damage due to landscape operations, operations by other Contractors or trespassers. Maintain protection during installation until acceptance. Treat, repair or replace damaged planting soil installation work immediately. B. Till compacted planting soil and replace planting soil that has become contaminated as determined by the Landscape Architect. Planting soil shall be tilled or replaced by the Contractor at no expense to the Owner. 3.12 REPAIR OF SETTLED PLANTING SOIL A. At the end twelve months after the date of substantial completion of the planting soil installation work, inspect the site and restore any areas where the grades have settled beyond the elevations shown on the drawings by an amount greater than 5% of the soil depth. 1. In shrub planting areas where the settlement is 3" or less, remove the mulch, top dress the area with the specified planting soil and re mulch. 2. In all ground cover areas and shrub planting areas where the settlement is greater than 3" remove the mulch and plants, add the specified planting soil, re plant and re mulch. END OF SECTION 329100 329100-10