Improvement to water supply Scheme Chandsuma.

Cost on account of hiring charges Hydrogeologist / Geologist by of firm for ground water feasibility survey and furnishing of geologist report to the department, Job also includes resistivity test by latest equipment for identification of site and subsequently furnishing of report to the department before construction of well is executed by firm.

Boring /Drilling bore well of required dia for casing /strainer pipe, by suitable method prescribed in IS 2800 (Part 1), including collecting samples from different strata preparing and submitting strata chart/bore log, including hire and running charges of all equipment tools plants and machineries required for the job, all complete as per direction of Engineer-in-Charge upto 90 m depth below ground level (All kinds of soil (Diameter of casing/strainer pipe of 250mm)

Boring/drilling bore well of required dia for casing /strainer pipe, by suitable method prescribed in IS 2800 (Part 1), including collecting samples from different strata preparing and submitting strata chart/bore log, including hire and running charges of all equipment tools plants and machineries required for the job, all complete as per direction of Engineer-in-Charge beyond 90 m & upto 150m depth below ground level. (The drilling depth may increase or decrease at the time of execution subject to physical conditions) All kinds of soil (Diameter of casing/strainer pipe of 200mm)

Gravel packing in tube well construction in accordance with IS: 4097, including providing gravel fine/ medium/coarse in required grading and sizes as per actual requirement all complete as per direction of Engineer in-charge.

Supplying, assembling, lowering and fixing in vertical position in bore well, ERW (Electric Resistance Welded)FE 410 mild steel screwed and socketed /plain ended casing pipes of required dia, conforming to IS: 4270 of reputed & approved make, including painted with outside surface with two coats, of anticorrosive paint of approved brand and manufacture including required hire &labour charges, fitting and accessories, all complete for all depths, as per direction of Engineer-in charge 250mm nominal dia having minimum wall thickness 6.4 mm. (The length of the casing pipe may increase or decrease at the time of execution of work as per the approved Casing Diagram).

Supplying, assembling, lowering and fixing in vertical position in bore well, ERW (Electric Resistance Welded)FE 410 plain slotted (having lot of size 1.6/3.2 mm)mild steel threaded and socketed/plain bevel ended pipes (type-A) of required dia, conforming to IS:8110, of reputed & approved make having wall thickness not less than 6.4mm including painted with outside surface with two coats of anticorrosive bitumestic paint of approved brand and manufacture including required hire and labour charges fitting and accessories, all complete for all depths as per direction of Engineer in-charge. 250 nominal size dia. (The length of the casing pipe may increase or decrease at the time of execution of work as per the approved Casing Diagram).

Development to tube well in accordance with IS: 2800 (Part-1) and IS:11189 to establish maximum rate of usable water yield without sand content (beyond permissible limit) with required capacity air compressor ruling the compressor for required time till well is fully developed measuring yield of well by "V" notch method or any other approved method measuring static level and draw down etc. by step draw down method collecting water sample & getting tested in approved laboratory I/c disinfection of tube well all complete including required hire and labour charges of air compressor tools and accessories etc. all as per direction of Engineer In-charge. The grouting and sealing of tube well has to be done to ensure safe sanitary conditions. The well casing shall be anchored with ISMC-150 and CC-Block. The CC-Block shall be laid of size (2x2x1) meter in M-15 Mix, excluding the annular Dia of the well and sloping away from it to prevent contaminated water flowing back into it. The casing pipe has to be anchored by weling ISMC-150 steel bracing of 2 – meters length each (04 no. bracings or channels) with cleats and sufficient welding area, bracing embedded with the CC- Block as per the directions of the site Engineer.