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I ar,G T V1 , (Crushed shell and limerock alone can set up like concrete without sand added.) 56 3 Q B. Hydrogrow Mix: A mixture made from several commercial products including: 1) cross-linked polyacrylimide (<O.1%) polymer, which is non-toxic and neutral in pH, and will absorb 150 to 350 times its weight in water from most tap sources; 2) ZeoPro zeolite mineral, amended with small amounts of starter fertilizers, from Zeoponix, Inc.; 3) Isolite porous ceramic, designed to hold large amounts of water without physical degradation or change of size of particle, from Sumitomo Group; 4) and aggromolated Humate, a natural source of nutrients and micronutrients, from Tri -C Enterprises. C. Grasspave2 Grass Paving Units: Lightweight injection -molded plastic units 0.5x0.50.025 m (20"x20"xI" high, 2.7 ft2 each) with hollow rings rising from a strong open grid allowing maximum grass root penetration and development. The plastic shall be 100% post -consumer recycled plastic resins, predominately HDPE, with minimum 3% carbon black concentrate added for UV protection. Loading capability is equal to 402 kg/cm2 (5700 psi) when filled with sand, over an appropriate depth of roadbase. Standard color is black. Unit weight = 5I0 g (18 oz.), volume = 8% solid. Units may also be shipped in pre -assembled into rolls that vary from 10 square meters (108 sf) to 125 square meters (1345 sf). D. Sand: Obtain clean sharp sand (washed concrete sand) to fill the 25 mm (one inch) high rings and spaces between the rings when seeding or using 13 mm (half inch) thick sod (soil thickness). E. Grass: Use species resistant to wear by traffic generally a Blue/Rye/Fescue mix used for athletic fields in northern climates, and Zoysia, Fescue, or Bermuda types in southern climates. (Check with local sod and seed suppliers for preferred mixtures.) (Dedicated firelanes can use same grass species used on surrounding turf.) (Parking applications require greatest wear -resistant species possible, generally available only by seed or sprigging.) (Choose one of the following paragraphs to suit project requirements.) 1. Sod: Use 13 mm (0.5") thick (soil thickness) rolled sod from a reputable local grower. Species should be wear resistant, free from disease, and in excellent condition. Sod shall be grown in sand or sandy loam soils only. Sod grown in soils of clay, silt, or high organic materials such as peat, will not be accepted. 2. Seed: Use seed materials, of the preferred species for local environmental and projected traffic conditions, from certified sources. Seed shall be provided in containers clearly labeled to show seed name, lot number, net weight, % weed seed content, and guaranteed % of purity and germination. Pure Live Seed types and amount shall be as shown on plans. F. Mulch: (Needed only for seeding.) Shall be of wood or paper cellulose types of commercial mulch materials often used in conjunction with hydroseeding operations. Mulches of straw, pine needles, etc. will not be acceptable because of their low moisture holding capacity. G. Fertilizer: A commercial "starter" fertilizer, with Guaranteed Analysis of 17-23-6, or as recommended by local grass supplier, for rapid germination and root development. 6/25/2007