PROVN OF RAIN WATER HARVESTING PIT AT SHANKAR VIHAR AND CONNECTED AREAS UNDER GE U WATER SUPPLY DELHI CANTT 10

Surface excavation n. exc 30cm deep and averaging 15cm deep and getting out in soft/loose soil, complete all as specified and directed.

Excavation in trenches not exc. 1.5 m wide and not exceeding 1.5 mtr in depth for foundation etc. or for shafts , wells, cesspits, manholes, pier holes, cable, pipe etc. n.exc 10 sqm on plan in soft/loose soil and getting out, complete all as specified and directed.

Excavation in trenches not exc. 1.5 m wide and exceeding 1.5 mtr deep but not exc 3.0 mtr deep in hard/dense soil and getting out for shafts, wells, cesspits, manholes pier holes, cables, pipe etc, complete all as sopecified and directed.

Excavation in trenches exceeding 3.0 mtr deep in hard rock and getting out for shafts, wells, cesspits, manholes, pier holes, cable, pipe etc, complete all as specified and directed.

Removing excavated soft soil to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.5 mtr above the starting point complete all as specified and directed.

Returning filling in including spreading, levelling, watering and well ramming in layers not exc. 25 cms complete all as specified and directed.

Material and labour for brick aggregate of size 40mm to 63mm. The first layer in rain harvesting pit is to be provided with brick aggregate and to be provided in the layer upto 400 mm.

Material and labour for gravells 05-10mm to be provided for second layer of rain water harvesting pit is to be provided upto the layer of 400 mm

Material and labour for filling sand in the third layer of rain water harvesting pit. The second partical should be of size 1.5 to 5mm to be provided in the layer upto 400mm thick

Trial bore of 200mm dia upto 200 mtr deep below the ground level in any kind of soil /strata incl hard stone/boulders incl hard stone /boulders including electronic logging, MS Cap MS fit iron clamp, reducing socket etc