Details: earth work in excavation by mechanical means (hydraulic excavator)/manual means over areas (exceeding 30 cm in depth, 1.5 m in width as well as 10 sqm on plan) including getting out and disposal of excavated earth lead upto 50 m and lift upto 1.5 m, as directed by engineer-in-charge. treatment of soil under existing floors using chemical emulsion @ one litre per hole, 300 mm apart including drilling 12 holes and plugging with cement mortar 1 :2 (1 cement : 2 coarse sand) to match the existing floor: with chlorpyriphos/lindane e.c. 20% with 1% concentration filling available excavated earth (excluding rock) in trenches ,plinth,sides of foundation etc . in layers not exceeding 20cm in depth ,consolidating each deposited layer by ramming and watering lead upto 50m and lift upto 1.5m . filling with available fly ash and earth (excluding rock) in trenches or embankment in layers (each layer should not exceed 15 cm), with intermediate layer of compacted earth (soil density of 9
Sector: Irrigation