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` r 570-3 Construction Methods . 570-3 . 1 General : Incorporate turf installation into the project at the earliest practical time . Shape the areas to be planted to the plan typical sections and lines and grade shown in the Contract Documents . Except in areas where the Contract Documents requires specific types of grass to match adjoining private property, any species of grass designated in Section 981 may be used . Use the methods and materials necessary to establish and maintain the initial grassing until acceptance of the Contract work in accordance with 5 - 11 . All of the permanent grassing material shall be in place prior to final acceptance . The Department will only pay for replanting as necessary due to factors determined by the Engineer to be beyond control of the Contractor. Complete all grassing on shoulder areas prior to the placement of the friction course on adjacent pavement . 570-3 .2 Seeding : At the Contractor ' s option, wildflower seed may be included in the turf seeding operation or performed separately from the turf seeding. Use of compost meeting the requirements of Section 987 as mulch is acceptable unless otherwise specified. 570-3 .3 Sod : Place the sod on the prepared surface , with edges in close contact. Do not use sod which has been cut for more than 48 hours . Place the sod to the edge of all landscape areas as shown in the plans and as shown in the Design Standards . Peg sod at locations where the sod may slide . Drive pegs through sod blocks into firm earth , flush with the sod soil surface, at intervals approved by the Engineer. The work and materials for pegging of sod as directed by the Engineer will be paid for as Unforeseeable Work. Place rolled sod parallel with the roadway and cut any exposed netting even with the sod edge . Monitor placed sod for growth of pest plants and noxious weeds . If pest plants and/or noxious weeds manifest themselves within 30 days of placement of the sod during the months April through October, within 60 days of placement of the sod during the months of November through March treat affected areas by means acceptable to the Department at no expense to the Department . If pest plants and/or noxious weeds manifest themselves after the time frames described above from date of placement of sod, the Engineer, at his sole option, will determine if treatment is required and whether or not the Contractor will be compensated for such treatment. If compensation is provided, payment will be made as Unforeseeable Work as described in 44 . Remove and replace any sod as directed by the Engineer. 570 -3 .4 Hydroseeding : Use equipment specifically designed for mixing the mulch, seed, fertilizer, tackifier and dye , and applying the slurry uniformly over the areas to be hydroseeded . Use mulch that does not contain reprocessed wood or paper fibers . Ensure that 50 % of the fibers will be retained on a twenty-five mesh screen . Mix fertilizer as required into the hydroseeding slurry . Ensure that the dye does not contain growth or germination inhibiting chemicals . When polyacrylamide is used as part of hydroseeding mix, only anionic polymer formulation with free acrylamide monomer residual content of less than 0 . 05 % is allowed. - 167 - FPID ( S ) : 423186 - 1 - 58 - 01