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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 16 -0-8 . Fertilizer shall include iron , minor nutrients and trace elements . At least 50 percent of the nitrogen shall be derived from organic sources . 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 . 13 . 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 . Where sodding is used in drainage ditches , the setting of the pieces shall be staggered so as to avoid a continuous seam along, the line of flow. Along the edges of such staggered areas , the offsets of individual strips shall not exceed 16 inches . In order to prevent erosion caused by vertical edges at the outer limits , the outer pieces of sod . shall be tamped. so as to produce a featheredge effect. On slopes greater than 3 : 1 , the Contractor shall prevent the sod from sliding by means of wooden pegs driven through the sod blocks into firm earth , at suitable intervals . Sodding shall not be performed when weather and soil conditions are , in the Engineer' s opinion , unsuitable for proper results . Sod shall be placed around all structures , equipment pads , etc. I . Sod placed on Ballfields (419 Hybrid Bermuda ) will be with big roll sod , with seams cut to match adjacent sod . J . Watering : The areas on which the sod is to be placed shall contain sufficient moisture , as determined by the Engineer, for optimum results . After being placed , the sod shall Addendum #2 11 /8/2012 01025-25 Technical Specifications F:\Public Works\ENGINEERING DIVISION PROJECTS\11267 South Co Park Multi Purpose Fields\Admim\bid documents\Contract Documents\Technical Specifications ADD #2 .doc