tender for extension of pipe line at athanur.; 1 earth work excavation in all classes of soils such as hard stiff clay, stiff black cotton, hard red earth, shales, murram, ordinary earth, earth mix with 50% fair sized boulders etc., with initial lead and lifts including laying, spreading, leveling, sectioning breaking clods etc., includingall incidental charges etc., complete as per standard specification . 2 supply and delivery of rigid pvc pipes andgi pipes to a standard length of 6m with a one end socket and other end free. the pipes should be quaranteed for pressure. 75 mm dia pvc pipe 3 lowering rigid pipes and special to trench and laying to proper grade and alignment with pvc coupler and cement paste and excuting to required pressure including conveyance of water for filling during testing etc completed as per standard specification. 4 refilling the excavated earth for the pipe line laying as per standard specification.