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1 SECTION STRUCTURAL SOIL PLANTING MIX 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. Section Includes: 1. Structural planting soils, mixing and placing. B. Related Sections: 1. Division 32 Section "Concrete Paving for pavement over structural soils. 2. Division 33 Section Storm Utility Drainage Piping for drainage within structural soil profile. 3. Division 32 Section Plants for planting within structural soils. 1.3 SUBMITTALS A. Product Data: For each type of product indicated, including soils. B. Qualification Data: For qualified landscape Installer. Include list of similar projects completed by Installer demonstrating Installer's capabilities and experience. Include project names, addresses, and year completed, and include names and addresses of owners' contact persons. C. Product Certificates: For each type of manufactured product, from manufacturer, and complying with the following: 1. Manufacturer's certified analysis of standard products. 2. Analysis of other materials by a recognized laboratory made according to methods established by the Association of Official Analytical Chemists, where applicable. D. Material Test Reports: For Soil Component of Structural Soil. 1. Provide the Testing Agency with representative samples all soils to be used in the work, at least thirty (30) days prior to planned site use. 2. The Testing Agency shall submit a report for Structural Soil Planting Mix tests. Furnish one copy directly to the Architect, one copy to the Owner s Representative, and one copy to the Contractor, at least two (2) weeks prior to planned site use. 1.4 QUALITY ASSURANCE A. Standards: STRUCTURAL SOIL PLANTING MIX

2 1. Comply with New York Department of Transportation (NYSDOT) Standards except as otherwise specified herein. 2. Comply with State and Local Environmental Standards and as specified herein. B. Installer Qualifications: A qualified landscape Installer whose work has resulted in successful mixing and placement of structural soils. It is the responsibility of the Contractor to provide such personnel. 1. Experience: Eight (8) previous installations of structural soils, described as mixing and placement, in addition to requirements in Division 01 Section "Quality Requirements." a. Provide a list of projects of similar quality, schedule requirements and construction detailing over the last five years. Qualifications shall include: the names of all similar projects, year completed, location, description of the scope of work including the types and quantities of planting mix/pavement material installed and the name, address and telephone number of the owner or the owner s representative 2. Installer's Field Supervision: Require Installer to maintain an experienced full-time supervisor on Project site when work is in progress. C. Testing Laboratory Qualifications: All testing and analysis shall be at the expense of the Contractor 1. Testing Laboratory Qualifications: An independent or university laboratory, recognized by the State Department of Agriculture, with the experience and capability to conduct the testing indicated and that specializes in types of tests to be performed. a. The testing laboratory for soil component of structural shall be approved by the Architect. 2. Geotechnical Testing Agency Qualifications: An independent testing agency qualified according to ASTM E 329 to conduct soil materials and rock-definition testing, as documented according to ASTM D 3740 and ASTM E 548. D. Structural Soil Analysis: For each unamended soil type, furnish soil and chemical analyses and a written report by a qualified soil-testing laboratory, performed in accordance with current AOAC Standards, including the following: 1. ph and Buffer ph. 2. Percent organic matter as determined by the loss of ignition of oven dried samples. Test samples shall be oven dried to a constant weight at a temperature of 230 degrees F, plus or minus 9 degrees. 3. Analysis for nutrient levels by parts per million including nitrate nitrogen, ammonium nitrogen, phosphorus, potassium, magnesium, manganese, iron, zinc, calcium and extractable aluminum. Nutrient test shall include the testing laboratory recommendations for supplemental additions to the soil as calculated by the amount of material to be added per volume of soil for the type of plants to be grown in the soil. 4. Analysis for levels of toxic elements and compounds including arsenic, boron, cadmium, chromium, copper, lead, mercury, molybdenum, nickel, zinc and PCB. Test results shall be cited in milligrams per kilogram. 5. Soluble salt by electrical conductivity of a 1:2 soil/water sample measured in Millimho per cm. 6. Cation Exchange Capacity (CEC). 7. Carbon/Nitrogen Ratio. 8. Report suitability of tested soil for plant growth. STRUCTURAL SOIL PLANTING MIX

3 a. Based upon the test results, state all recommendations for soil treatments and soil amendments to be incorporated. State recommendations in weight per 1000 sq. ft. (92.9 sq. m) or volume per cu. yd. (0.76 cu. m) for nitrogen, phosphorus, and potash nutrients and soil amendments to be added to produce satisfactory planting soil suitable for healthy, viable plants. 9. Report presence of problem salts, minerals, or heavy metals, including aluminum, arsenic, barium, cadmium, chromium, cobalt, lead, lithium, and vanadium. If such problem materials are present, provide additional recommendations for corrective action. E. Bulk Density: Submit a bulk density of the sample and particle size analysis including the following gradient of mineral content: USDA Designation Gravel Sand Silt Clay Size in mm +2 mm 0.05 to 2 mm to 0.05 mm minus mm Sieve analysis shall be performed and compared to USDA Soil Classification System. Sieve analysis shall be done by a combined hydrometer and wet sieving using sodium hexametaphosphate as a dispersant in compliance with ASTM D422 after destruction of organic matter by hydrogen peroxide. F. Moisture Density: Submit 5-point minimum moisture density curve AASHTO T 99 test results for each Structural Soil sample without removing oversized aggregate. G. Bearing Ratio: Submit California Bearing Ratio test results for each Structural Soil sample compacted to peak standard density. The soaked CBR shall equal or exceed a value of 50. H. Stone Ratio: Submit measured dry-weight percentage of stone in the mixture. I. The approved Structural Soil samples shall be the standard for each lot of 500 cubic yards of material. J. Submit one cubic foot sample per each 500 cubic yards of required material, and for each sample, the following analysis for all Crushed Stone. 1. Provide a particle size analysis including the following gradient of mineral content: USDA Designation Size in mm 3@ +76 mm 2-1/2@ mm 2@ mm 1-1/2@ mm STRUCTURAL SOIL PLANTING MIX

4 mm Fine gravel Sand Silt Clay mm 2-19 mm mm mm minus mm K. Provide the manufacturer s analysis of the following: 1. Loose and rodded unit weight. 2. Bulk specific gravity and absorbency. 3. Stone dimension and surface texture description. 4. Documentation of acceptance for use as NYS DOT approved aggregate. L. Provide a percent pore space analysis defined as follows: 1. Rodded Unit Weight divided by the Bulk Specific Gravity multiplied by 100 M. Submit one pound sample of each type of fertilizer and three certificates showing composition and analysis. Submit the purchasing receipt for each fertilizer showing the total quantity purchased for the project prior to installation. N. Submit to the Architect for review a proposed plan and vertical section layout of all Structural Soil. O. Preinstallation Conference: Conduct conference at Project site. 1.5 DELIVERY, STORAGE AND HANDLING A. Store materials on a paved surface near the surface that will be used for mixing, or use a wood or fabric barrier to prevent mixing with other materials. Do not deliver or place soils in frozen, wet, or muddy conditions. B. Material shall be delivered at or near optimum compaction moisture content as determined by AASHTO T99 (ASTM D 698). Do not deliver or place materials in an excessively moist condition (Beyond two percent above optimum compaction moisture content as determined by AASHTO T 99 (ASTM D 698). C. Protect soils and mixes from absorbing excess water and from erosion at all times. Do not store materials unprotected from large rainfall events. Do not allow excess water to enter site prior to compaction. If water is introduced into the material after grading, allow material to drain or aerate to optimum compaction moisture content. STRUCTURAL SOIL PLANTING MIX

5 1.6 COOPERATION A. Examine drawings and specifications for other contracts, to determine nature of proposed construction. Perform work to conform with construction called for in such a manner as not to interfere or delay work of other Contractors. 1.7 PROJECT CONDITIONS A. All areas to receive Structural Soil shall be inspected by the Contractor before starting work and all defects such as incorrect grading, compaction and inadequate drainage etc. shall be reported to the Architect prior to beginning this work. B. The Contractor shall be responsible for judging the full extent of work requirements involved, including but not limited to the potential need for temporary storage and staging of soils, including moving soil stockpiles at the site to accommodate scheduling of other work and the need to protect installed soils from compaction, erosion and contamination. 1.8 MAINTENENCE A. Maintenance Instructions: Prior to the time of Final Acceptance of the Work, submit maintenance instructions for the use, removal and replacement of Structural Soil for the Owner s use. The instructions shall be reviewed by the Project Architect as a pre-condition for Final Acceptance of the Work. PRODUCTS 2.1 GENERAL A. Prior to acceptance, the contractor shall have the soil analyzed for chemical/nutrient levels using Morgan's Extraction procedure. Furnish analysis that can be recognized from laboratory tests made in accordance with methods established by the Association of Official Agricultural Chemists. Levels of the following nutrients shall fall within the following: Nutrients Acceptable Levels Nitrate 1 to 2.5 ppm Phosphorus 0.1 to 0.3 ppm Potassium 6 to 14 ppm Magnesium 50 to 70 ppm Manganese 2 to 5 ppm STRUCTURAL SOIL PLANTING MIX

6 Iron 0.5 to 2.0 ppm Zinc to 0.1 ppm Calcium 400 to 800 ppm If the soil is deficient in any nutrient, supplementary fertilizer shall be added to meet these requirements. 2.2 CLAY LOAM A. Clay Loam shall be a loam based on the USDA classification system as determined by mechanical analysis (ASTM D-422) and it shall be of uniform composition, without admixture of subsoil. It shall be free of stones greater than one-half inch, lumps, plants and their roots, debris and other extraneous matter over one inch in diameter or excess of smaller pieces of the same materials as determined by the Architect. It shall not contain toxic substances harmful to plant growth. It shall be obtained from naturally well-drained areas, which have never been stripped of topsoil before and have a history of satisfactory vegetative growth. Clay loam shall contain not less than 2% nor more than 5% organic matter as determined by the loss on ignition of over-dried samples. Test samples shall be oven-dried to a constant weight at a temperature of 230 degrees F., plus or minus 9 degrees. B. Mechanical analysis for a Loam/Clay Loam shall be as follows: Textural Class % of Total Weight Gravel less than 5% Sand 20-45% Silt 20-50% Clay 20-40% C. Chemical analysis: Meet or be amended to meet the following criteria: 1. ph between 5.5 to Percent organic matter 2-5% by dry weight. 3. Nutrient levels as required by the testing laboratory recommendations for the type of plants to be grown in the soil. 4. Toxic elements and compounds below the United States Environmental Protection Agency Standards for Exceptional Quality sludge or local standard; whichever is more stringent. 5. Soluble salt less than 1.0 Millimho per cm. 6. Cation Exchange Capacity (CEC) greater than Carbon/Nitrogen Ratio less than 33:1. D. Loam/Clay Loam shall be the product of a commercial processing facility specializing in production of stripped natural topsoil. No topsoil shall come from USDA - classified prime farmland. STRUCTURAL SOIL PLANTING MIX

7 2.3 FERTILIZER A. Commercial fertilizer complying with State and United States fertilizer laws. Deliver fertilizer in original unopened containers, which shall bear the manufacturer s certificate of compliance covering analysis, which shall be furnished to the Architect. Fertilizer shall be formulated for mixing into the soil and be certified by the manufacturer to provide controlled release of nitrogen continuously for a period of no less than nine months and no more than 12 months. B. Fertilizer percentages of weight of ingredients and application rates shall be as recommended by the soil testing results. 2.4 SULFUR (if needed) A. Sulfur shall be commercial granular, 96% pure sulfur, delivered in containers with the name of the manufacturer, material and analysis appearing on the container. B. Sulfur used to lower soil ph above 6.5 shall be ferrous sulfate formulation. C. LIME (if needed) D. Agricultural limestone containing a minimum of 85% carbonates. Minimum gradation: 100% passing 10 mesh sieve; 98% passing 20 mesh sieve; 55% passing 60 mesh sieve and 40% passing 100 mesh sieve. 2.5 CRUSHED STONE A. Crushed Stone shall be a DOT certified crushed stone. Granite and limestone have been successfully used in this application. Select and angular stone % of the stone should pass the 1.5 inch sieve, 20-55% should pass the 1.0 inch sieve and 10% should pass the 0.75 inch sieve. A ratio of nominal maximum to nominal minimum particle size of 2 is required. B. Acceptable aggregate dimensions will not exceed 2.5:1.0 for any two dimensions chosen. C. Minimum 90% with one fractured face, minimum 75% with two or more fractured faces. D. Results of Aggregate Soundness Loss test shall not exceed 18%. E. Losses from LA Abrasion tests shall not exceed 40%. 2.6 HYDROGEL A. Hydrogel/Wetting Agent - Shall be a potassium propenoate-propenamide copolymer hydrogel such as: 1. Gelscape, Amereq Corporation, 19 Squadron Blvd., New York, NY 10956, Soil Moist, JRM Chemical Inc., 4881 Neo Parkway, Cleveland, OH 44128, SuperSorb, Aquatrols Corporation of America, 5 North Olney Avenue, Cherry Hill, NJ 08003, Or approved equal. STRUCTURAL SOIL PLANTING MIX

8 2.7 WATER A. The Contractor shall be responsible to furnish his own supply of water to the site at no extra cost. All work inured or damaged due to the lack of water, or the use of too much water, shall be the Contractor s responsibility to correct. Water shall be free from impurities injurious to vegetation. 2.8 STRUCTURAL SOIL A. A uniformly blended mixture of crushed Stone, Clay Loam and Hydrogel, mixed to the following proportion: Material Crushed Stone Loam Hydrogel Total moisture Unit of Weight 100 units dry weight as determined by the test of the mix (approx. 20 units dry weight) 0.03 units dry weight AASHTO T-99 optimum moisture B. The initial mix design for testing shall be determined by adjusting the ratio between the Crushed Stone and the clay loam. Adjust final mix dry weight mixing proportion to decrease soil in mixture if CBR test results fail to meet acceptance (CBR #50). EXECUTION 3.1 SITE PREPARATION A. Do not proceed with the installation of the Structural Soil material until all walls, curb footings and utility work in the area have been installed. For site elements dependent on Structural Soil for foundation support, postpone installation until immediately after the installation of Structural Soil. B. Install subsurface drain lines as shown on the Drawings prior to installation of Structural Soil material. C. Excavate and compact the proposed subgrade to depths, slopes and widths as shown on the Drawings. 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. D. Confirm that the subgrade 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. E. Clear the excavation of all construction debris, trash, rubble and any foreign material. In the event that fuels, oils, concrete washout silts or other material harmful to plants have been spilled into the STRUCTURAL SOIL PLANTING MIX

9 subgrade material, excavate the soil sufficiently to remove the harmful material. Fill any over excavation with approved fill and compact to the required subgrade compaction. F. Do not proceed with the installation of Structural Soil until all utility work in the area has been installed. All subsurface drainage systems shall be operational prior to installation of Structural Soils. G. Protect adjacent walls, walks and utilities from damage or staining by the soil. Use ½ 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. H. Clean up all trash and any soil or dirt spilled on any paved surface at the end of each working day. I. Any damage to the paving or architectural work caused by the soils installation Contractor shall be repaired by the general contractor at the soils installation contractor s expense. J. Maintain all silt and sediment control devices required by applicable regulations. Provide adequate methods to assure that trucks and other equipment do no track soil from the site onto adjacent property and the public right of way. 3.2 MIXING OF STRUCTURAL SOIL PLANTING MIX A. Crushed stone, soil, hydrogel, organic material, water and any fertilizer or limestone necessary to meet the requirements of this specification shall be mixed prior to placement. Mixing shall uniformly blend the specified components in the approximate ratio indicated below and shall meet the additional following requirements. B. Approximate ratio of structural soil planting mix components - Units of Weight - Stone, Soil and Hydrogel ratios are dry weight basis: Material Composition: Crushed Stone 100 Soil 20 Hydrogel 0.03 Total Moisture 10 C. The dry hydrogel shall be mixed with a sufficient amount of water to form a slurry. The slurry shall be allowed to set for at least one hour with periodic agitation/mixing to assure hydration of the hydrogel. D. Mixing is to occur with a front-end loader on a flat, paved surface. 1. The stone shall be spread in a 12 inch layer. 2. Spread the hydrogel evenly onto the stone, followed by a layer of moist soil. 3. Continue layering in this fashion if the front-end loader is large enough to mix the material effectively, up to a six-layer pile. 4. Mix and turn the pile until uniformly blended. Uniformly add moisture to assist mixing if the system is too dry, but do not exceed optimal moisture content for compaction as determined by testing. STRUCTURAL SOIL PLANTING MIX

10 E. Mixing is to occur with a front end loader or by hand on a flat, paved surface. 1. The hydrogel slurry shall be evenly spread onto the crushed stone before the soil is added. Mixing shall continue for a sufficient time, but not less than ten (10) minutes to assure the crushed stone is completely coated with the hydrogel slurry. 2. The soil shall be added to the crushed stone and slurry mixture in a manner that assures the resulting mix is free of clods. The mixing shall be controlled to assure over-mixing does not cause the material to become pelletized. F. The resulting Structural Soil Planting Mix (crushed stone, hydrogel and soil mixture) shall be protected from drying prior to placement. 3.3 PLACEMENT AND COMPACTION OF STRUCTURAL SOIL PLANTING MIX A. The Structural Soil Planting Mix shall be placed in locations as indicated on Plan(s). It shall be the contractor's responsibility to properly compact the mixture. The contractor shall determine the type, size and weight of compactor best suited to the work and select and control the lift thickness. The contractor shall also exert proper control over the moisture content of the mixture and other details necessary to obtain satisfactory results. B. The Architect and Owner s Representative will inspect the contractor's operations and will permit the work to continue where: 1. Lift thickness is controlled and is consistent with the compaction equipment selected. 2. The compactive effort is uniformly applied. 3. The Architect and Owner s Representative concludes from visual observation that proper compaction has been obtained. 4. Compaction and test density of the compacted material to meet or exceed 95% of Maximum Dry Density. C. Whenever the contractor's operations do not conform to the above criteria, the Owner s Representative will prohibit placement of additional material until the contractor takes corrective action. D. When the Owner s Representative determines density tests are necessary, the contractor shall provide any assistance required to facilitate such tests. Such assistance shall include, but will not be limited to, excavation and backfill of test holes. This work shall be considered to be incidental to construction. 3.4 ACCEPTANCE STANDARDS A. The Architect will inspect the work upon the request of the Contractor. Request for inspection shall be received by the Architect at least 10 days before the anticipated date of inspection. 3.5 CLEANING A. Upon completion of the Structural Soil installation operations, clean areas within the contract limits. Remove all excess fills, soils and mix stockpiles and legally dispose of all waste materials, trash and debris. Remove all tools and equipment and provide a clean, clear site. Sweep, do not wash, all paving and other exposed surfaces of dirt and mud until the paving has been installed over the STRUCTURAL SOIL PLANTING MIX

11 Structural Soil material. Do no washing until finished materials covering Structural Soil material are in place. END OF SECTION STRUCTURAL SOIL PLANTING MIX