REPAIR AND NAINT OF BOREWELL, CHLORINE PLANT, STARTER PANEL AND OTHER PUMP SET ALONGWITH CONNECTED ITEMS AT VARIOUS LOCATIONS AT AF STN UNDER GE AVADI

Excavation in trenches not exceeding 1.50 m in width and 1.50 m in depth for laying CI/DI/GI/UPVC water supply pipelines in any type of soil, including dressing sides, levelling and ramming bottoms, getting out excavated earth and depositing clear of trench edges, complete all as specified and directed .

Removing excavated earth and surplus material and depositing at locations directed within a lead not exceeding 50 m and lift not exceeding 1.50 m above starting level, including loading, unloading, spreading and levelling, complete all as specified and directed.

Returning filling in trenches with selected excavated earth in layers not exceeding 25 cm loose thickness, including spreading, watering, well ramming, consolidation, dressing and levelling, complete all as specified and directed.

Supply and laying UPVC pipes 100 mm dia of Sch 80 laid in trench complete including all fittings such as bends, tees, short pieces, connectors, elbows, reducers, union, sockets etc laid in trenches including taking down the old rusted pipe and testing complete all as specified and as directed.

All as per item No. 4.00 but 80mm dia

All as per item No. 4.00 but 50mm dia

Supply and laying Ductile iron pipes of 150mm dia of sizes class K9 with spigot and socket end of any length confirming to IS specification laid in trenches all as specified and as directed .Note:- Road Cutting/Drain broken at site will be repaired by the contractor without any extra cost paid to the contractor.

Supply and fix in repair for CI/DI fittings for spigot socketed /flanged pipe upto 150mm bore such as bends (any type, radius and angle) tapers any type (straight, bend, increasing, decreasing or double socket etc), tee, joint pieces, single branch 'Y' junction double branch cross (all sockets or socket and spigot) collars caps complete all as specified and directed. ( Note :-Joints shall be measured and paid separately).

M&L for earthing complete with galvanised steel earth plate electrode 600x600x6mm thick buried in ground vertical to a depth not less than 2.25 mtrs deep below ground level with top edge of plate not less than 1.5 mtr below normal ground level connected to galvanised GI strip of size 32 X 6 mm and 40 mm dia bore 7.5 mtr long light grade GI protection pipe for earth strip and GI watering pipe 40 mm dia medium grade from the topp edge of earth plate fixed with deep cut on one end of pipe and fix from earth plate up to one feet above ground level of other end and plugged watering pipe at top with MS cap and grouted in PCC 1:2:4 of size 30 X 30 X 30 CM etc and 15 CM alternate layer of charcoal and salt around all sides of earth plate all as shown in electric plate No 3 of SSR part I of 2009 complete all as specified and directed.. Note :- All joints either strip to strip or strip to earth plate are fixed with welded joints.

Material and labour for demolition of old broken / usnv valve pit and construction masonry valve chamber size 120 X 120 X 120 cm (Internal dimension) in repair with 100 mm thick PCC 1:4:8 type D-2 (using 40mm graded stone aggregate) sub base of floor, 50mm thick PCC 1:2:4 type B-1 (using 20mm graded stone aggregate) in floor finished even and smooth without using extra cement, one brick thick wall in cm 1:4 using old size sub class 'B' bricks and plastering internally and externally upto 150mm below GL 15 mm thick with cement mortar (1:4) and MS sheet cover not less than 6 mm thick with angle iron frame size 40x40x6mm, locking arrangement and painting with two coats synthetic enamel painting over a coat of the red oxide primer including excavation and earth work in any type of soil complete all as specified and directed.