SPECIAL REPAIR/ REPLACEMENT OF SEWAGE PUMP MOTORS, WATER SUPPLY PIPELINE AND BORE WELLS AGAINST BER AT CERTAIN LOCATIONS AT AF STN BAREILLY

M&L for drilling trial bore by rotary/ reverse rotary Method in any type of strata consisting of 250mm dia drill bit for depth up to 200m in sequence from ground level as given below for different bore wells complete as per IS -2800, part -1

The following test and reporting will be carried out by the contractor and approved by GE all as per IS -2800, part 1 (i) Recording the well discharge during drilling by a 90 degree V- notch. (ii) Recording the water bearing horizon. (iii) Taking the samples from the bore well cutting for every 3m interval and every change in strata if less than 3m. (iv) Preparation of litho logs based on these samples. (v) Drill time log to be prepared and prescribed. (vi) Aquifer performance tests at constant discharge with draw down and recovery reading.

The depth of trial boring of the tube well at the site indicated by the GE is anticipated to be 200 meter below ground level . The depth may, however be ordered in writing to be varied by the GE up to a maximum of 25 % of the above mentioned depth (plus or minus). If the GE decided that suitable water bearing strata is not available in the aforesaid bore or the boring can not be continued further on account of the type of strata met with, he may order the contractor to bore at other site(s) selected by the GE, until suitable water bearing strata is met with or boring cannot continue further on account of the type of strata met with provided the total number of bores (including the first bore) does not exceed two Numbers the decision of the GE shall be final & binding .

M&L for development of trial bore to be reamed by suitable size of bit to accommodate 300 X 200 mm dia assembly pipes leaving 5" annular space around assembly pipes from 250mm to 675 mm for 60 RM from ground level complete all as specified and directed.

M&L for development of trial bore to be reamed by suitable size of bit to accommodate 300 X 200 mm dia assembly pipes leaving 5" annular space around assembly pipes from 250mm to 525 mm from exceeding depth of 60 RM but not exceeding 200 meter below ground level complete all as specified and directed.

M&L for development of trial bore to be reamed by suitable size of bit to accommodate 300 X 200 mm dia assembly pipes leaving 5" annular space around assembly pipes from 250mm to 525 mm from exceeding depth of 200 RM but not exceeding 220 meter below ground level complete all as specified and directed.

Supplying and assembling including jointing, lowering & fixing in position plain mild steel sheet casing (seamless) pipe 300mm bore of thickness 6 mm confirming to IS: 4270-2001, pipe jointed and welded with coupler rings, Welding shall be done throughout the circumference of the pipe and coupler ring on both sides complete all as specified and directed. Make of Pipe :-Jindal/TATA/SAIL/PRAKASH SURYA/Jindal.

All as per item no 5 here in before but Supplying and assembling including jointing, lowering & fixing in position plain mild steel sheet casing (seamless) pipe 200mm bore of thickness 6 mm confirming to IS: 4270-2001, pipe jointed and welded with coupler rings, Welding shall be done throughout the circumference of the pipe and coupler ring on both sides complete all as specified and directed.

All as per item no 5 here in before but Supplying and assembling including jointing, lowering & fixing in position ERW slotted mild steel sheet casing (seamless) pipe 200mm bore of thickness 6 mm confirming to IS: 4270-2001, pipe jointed and welded with coupler rings, Welding shall be done throughout the circumference of the pipe and coupler ring on both sides complete all as specified and directed.

S&F mild steel reducing socket 300mmx200mm including welding MS strip 4mm X 6mm (6 Nos) on each joint extended 100mm on each side complete all as specified and directed. Note:- The Wall thickness of the socket side shall not be less than 7.04mm.