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Replacement of Defective Sod : Any dead sod or sod showing ( less than 95 % of a square ) indication of probable non survival or lack of health and vigor , or which do not exhibit the characteristics to meet specifications , shall be replaced within two weeks of notice from Owner or Engineer . All replacement sod shall be furnished /installed at no additional cost to the Owner and shall be guaranteed for three months . All replacement shall meet original specifications . The Contractor shall notify the Owner and Engineer ten days prior to the end of the guarantee period and such guarantee shall be extended until notification is received . At the end of the guarantee period , all sod that is dead or in unsatisfactory growth shall be replaced within two weeks . D . Fertilizer: Commercial fertilizers shall comply with the state fertilizer laws . The numerical designations for fertilizer indicate the minimum percentages ( respectively) of ( 1 ) total nitrogen , (2 ) available phosphoric acid and ( 3 ) water-soluble potash contained in the fertilizer . The chemical designation of the fertilizer shall be 164- 8 . Fertilizer shall include iron , minor nutrients and trace elements . At least 50 percent of the nitrogen shall be derived from organic sources . At least 50 percent of the phosphoric acid shall be from normal super phosphate or an equivalent source which will provide a minimum of two units of sulfur. The amount of sulfur shall be indicated on the quantitative analysis card attached to each bag or other container. Contractor shall ensure 1 pound of nitrogen per 1 , 000 square feet . E . Water for Grassing : Contractor shall provide the water used in the sodding operations as necessary to meet the requirements of Article 570 - 5 and 2 . 34 . 8 . F . Preparation of Ground : The area over which the sod is to be placed shall be scarified or loosened to a depth and then raked smooth and free from debris . Where the soil is sufficiently loose and clean , the Owner, at his discretion , may authorize the elimination of ground preparation . G . Application of Fertilizer: Before applying fertilizer , the soil pH shall be brought to a range of 6 . 0 - 7 . 0 . Contractor shall apply two (2 ) applications . The initial shall be fertilizer and the second application shall be "weed and feed " . The fertilizer shall be spread uniformly over the sodded area at the rate of 436 pounds per acre , or 10 pounds per 1 , 000 square feet , by a spreading device capable of uniformly distributing the material at the specified rate . Contractor shall apply applications as per manufacturer's specification . All tickets from bags shall be handed over to the County Inspector . On steep slopes , where the use of a machine for spreading or mixing is not practicable , the fertilizer shall be spread by hand and raked in and thoroughly mixed with the soil to a depth of approximately 2 inches . H . Placing Sod : The sod shall be placed on the prepared surface , with edges in close contact and shall be firmly and smoothly embedded by light tamping with appropriate tools . 01025-25 Technical Specifications F : \Public Works\ENGINEERING DIVISION PROJECTS\1142-Misc Culvert Replacements\Admim\bid documents\Technical Specifications . doc