north western railway
Special condition/Specifications for NS Items NS-1 Water supply of Drinking water :1.
2. 3. 4. i) ii) iii)
5.
6. i)
ii)
i) v)
The potable drinking water, which should be fit from hygienic point of view is required to be supplied as per Railway’s requirement at the location & period for supply as advised by ADEN/ SE(Works) Incharge. The rates should be inclusive of all charges and no extra payment what-so-ever on any account will be payable to the contractor. Supply of Water shall be Governed by the Tender Conditions of Zonal Contracts. Quality of WaterWater Shall be potable with respect to suspended & dissolved impurities. The sources of water supply shall be got approved by the Engineer before hand. Water will be sent for chemical or bacteriological tests to Medical Supdt. or to Laboratory, as and when required by Engineer In charge by taking sample ( as per standard procedure in presence of contractor or his representative, as the cost of contractor. QuantityContractor shall supply drinking water as directed by Engineer / SE(Works) at given locations. If contractor fails to supply the quantity at location as directed Rs.250/- per day per location shall be fined. PaymentThe capacity of the tanker shall be intimated in advance by the contractor and will be got checked from Engineer / Engineer’s representative. Tankers will be numbered, site and capacity will be indicated on each. Payment will be made as per actual supply of water through tankers or as per measurements of underground hauzes / storages tanks / drums etc. The quantity supplied has to be witnesses by a person nominated for this purpose by AEN of the section, without which payment shall not be made. Regular record showing dates and quantity supplied will be maintained by the Inspector. This shall also be witnesses by contractor or his representative. The contractor shall be responsible for bringing portable water through kutcha or pucca routes. Nothing extra will be paid for crossing nallah, bridges, tracks etc. and other eventuality. I agree to abide by the above conditions.
PlaceDate-
Signature Not Verified Digitally signed by DHARM CHAND SHARMA Date: 2018.04.28 15:16:57 IST Reason: IREPS-CRIS Location: New Delhi
Signature of Tenderer/s Address-
STANDARDS OF QUALITY OF DRINKING WATER PHYSICAL AND CHEMICAL STANDARDS S.No. Characteristics
Requirement (Desirable limit)
Permissible limit in the absence of alternate source
1 1
2 Turbidity (NTU scale) 5.0
3 10
4
2
Colour Haten units 5.0
25
3
Taste and odour
Unobjectionable
4
Ph value
6.5 to 8.5
5
2000
7
Total dissolved solids (mg/I) 500 max. Total hardness as CaCo3(mg/I) 300 max. Chlorides as CI2 (mg/I) 250
8
Sulphates as SO4 (mg/I) max
200
400
9
Fluorides as F (mg/I) max.
1
1.5
10
Nitrates as No3 (mg/I) max.
45
100
11
Calcium as Ca (mg/I) max.
75
200
12
Iron as Fe (mg/I) max.
0.3
1
13
Zinc as Zn (mg/I) max.
5
15
14
Mineral oil (mg/I) max.
0.01
0.03
15
Copper as Cu (mg/I) max.
0.05
1.5
6
--No relaxation
600 1000
Toxic materials 16
Arsenic as As (mg/I) max.
0.05
No relaxation
17
Cadmium as Cd (mg/I) max.
0.01
-do-
18
Lead as Pb (mg/I) max.
0.05
-do-
19
Residual free Chlorine (mg/I) 0.2* --max. *when protection against viral infection is required, it should be min. 0.5 mg/I
PlaceDate-
Signature of Tenderer/s Address-
NS-2 & NS-3 Finishing walls with Snowcem :1. Material The cement paint shall conform to IS.5410 and be of approved brand and manufacture. The cement paint shall be brought to the site of work by the contractor in its original container in sealed condition. The material to be brought in at a time shall be adequate to cover the whole work or atleast a fortnight’s work. The materials shall be kept in the joint custody of the Contractor and the Engineer. The empties shall not be removed from the site of work till the relevant item of the work has been completed and permission obtained from the Engineer. 2. Preparation of Surface :- In old work, all loose pieces and scales shall be removed and the surface shall be scrubbed thoroughly to clear dirt, dust and algae etc by brushing and washing with water. To give an even and smooth surface, sand papering where found necessary shall be used. Holes and pittings in plaster shall be made good by applying cement putty. A coat of water proof cement paint shall be applied over these patches after wetting them thoroughly. 3. Preparation of mix : Cement paint shall be mixed in such quantities as can be used up within an hour of its mixing as otherwise the mixture will set and thicken, affecting flow and finish. Cement paint shall be mixed with water in two stages. The first stage shall comprise of 2 parts of cement paint and one part of water stirred thoroughly and allowed to stand for 5 minutes. Care shall be taken to add the cement paint gradually to the water and not vice versa. The second stage shall comprise of adding further one part of water to the mix and stirring thoroughly to obtain a liquid of workable and uniform consistency. In all cases the manufacturer's instructions shall be followed meticulously. The lids of cement paint drums shall be kept tightly closed when not in use, as by exposure to atmosphere the cement paint rapidly becomes air set due to its hygroscopic qualities. In case of cement paint brought in gunny bags, once the bag is opened, the contents should be consumed in full on the day of its opening. If the same is not likely to be consumed in full, the balance quantity should be transferred and preserved in an airtight container to avoid its exposure to atmosphere. 4. Application 4.1 The solution shall be applied on the clean and wetted surface with brushes or spraying machine. The solution shall be kept well stirred during the period of application. It shall be applied on the surface which is on the shady side of the building so that the direct heat of the sun on the surface is avoided. The method of application of cement paint shall be as per manufacturer's specification. The completed surface shall be watered after the day's work. 4.2 The second coat shall be applied after the first coat has been set for at least 24 hours. Before application of the second or subsequent coats, the surface of the previous coat shall not be wetted.. 4.3 In old work, the treatment shall be with one or more coats as found necessary to get a uniform shade. 4.4 Precaution : Water proof cement paint shall not be applied on surfaces already treated with white wash, colour wash, distemper dry or oil bound, varnishes, paints etc. It shall not be applied on gypsum, wood and metal surfaces. If Water Proof Cement Paint is required to be applied on existing surfaces previously treated with white wash, colour wash etc, the surface shall be thoroughly cleaned by scrapping off all the white wash, colour wash etc., completely. Thereafter a coat of cement primer shall be
applied followed by two or more coats of water proof cement paint. 5. Other Specifications : Scaffolding 5.1 Wherever scaffolding is necessary, it shall be erected on double supports tied together by horizontal pieces, over which scaffolding planks shall be fixed. No ballies, bamboos or planks shall rest on or touch the surface, which is being white washed. 5.2. For all exposed brick work or tile work, double scaffolding having two sets of vertical supports shall be provided. The supports shall be sound and strong, tied together with horizontal pieces over which scaffolding planks shall be fixed. In case of special type of brick work, scaffolding shall be got approved from Engineer in advance. 5.3 Where ladders are used, pieces of old gunny bags shall be tied on their tops to avoid damage or scratches to walls. 5.4 For white washing the ceiling, proper stage scaffolding shall be erected. 6. Rate : The rate shall include the cost of all labour and materials involved in all the above operations described above. NS-4 & NS-5 OIL BOUND WASHABLE DISTEMPERING :1. Materials :- Oil Bound washable distemper (IS.428)) of approved brand and manufacture shall be used. The distemper shall be diluted with water or any other prescribed thinner in a manner recommended by the manufacturer. Only sufficient quantity of distemper required for day's work shall be prepared. The distemper shall be brought by the contractor in sealed tins in sufficient quantities at a time to suffice for a fortnight's work, and the same shall be kept in the joint custody of the contractor and the Engineer. The empty tins shall not be removed from the site of work, till this item-of work has been completed and passed by the Engineer. 2. Preparation of the Surface 2.1 In old work, all loose pieces and scales shall be removed by sand papering. The surface shall be cleaned of all grease, dirt etc. Pitting in plaster shall be made good with plaster of paris mixed with the colour to be used. The surface shall then be rubbed down again with a fine grade sand paper and made smooth. A coat of the distemper shall be applied over the patches. The patched surface shall be allowed to dry thoroughly before the regular coat of distemper is applied.
3. Application 3.1 Distemper Coat : In old work the distemper shall be applied over the prepared surface in the same manner as in new work. One or more coats of distemper as are found necessary shall be applied to obtain an even and uniform shade. 15 cm double bristled distemper brushes shall be used. After each day’s work, brushes shall be thoroughly washed in hot water with soap solution and hung down to dry. Old brushes which are dirty and caked with distemper shall not be used on the work. 4 Other Specifications : Scaffolding 4.1 Wherever scaffolding is necessary, it shall be erected on double supports tied together by horizontal pieces, over which scaffolding planks shall be fixed. No ballies, bamboos or planks shall rest on or touch the surface, which is being white washed.
4.2. For all exposed brick work or tile work, double scaffolding having two sets of vertical supports shall be provided. The supports shall be sound and strong, tied together with horizontal pieces over which scaffolding planks shall be fixed. In case of special type of brick work, scaffolding shall be got approved from Engineer in advance. 4.3 Where ladders are used, pieces of old gunny bags shall be tied on their tops to avoid damage or scratches to walls. 4.4 For white washing the ceiling, proper stage scaffolding shall be erected. 5. Rate : The rate shall include the cost of all labour and materials involved in all the above operations described above.
PlaceDate-
Signature of Tenderer/s Address-
2. 3. 4. i) ii) iii)
5.
6. i)
ii)
i) v)
The potable drinking water, which should be fit from hygienic point of view is required to be supplied as per Railway’s requirement at the location & period for supply as advised by ADEN/ SE(Works) Incharge. The rates should be inclusive of all charges and no extra payment what-so-ever on any account will be payable to the contractor. Supply of Water shall be Governed by the Tender Conditions of Zonal Contracts. Quality of WaterWater Shall be potable with respect to suspended & dissolved impurities. The sources of water supply shall be got approved by the Engineer before hand. Water will be sent for chemical or bacteriological tests to Medical Supdt. or to Laboratory, as and when required by Engineer In charge by taking sample ( as per standard procedure in presence of contractor or his representative, as the cost of contractor. QuantityContractor shall supply drinking water as directed by Engineer / SE(Works) at given locations. If contractor fails to supply the quantity at location as directed Rs.250/- per day per location shall be fined. PaymentThe capacity of the tanker shall be intimated in advance by the contractor and will be got checked from Engineer / Engineer’s representative. Tankers will be numbered, site and capacity will be indicated on each. Payment will be made as per actual supply of water through tankers or as per measurements of underground hauzes / storages tanks / drums etc. The quantity supplied has to be witnesses by a person nominated for this purpose by AEN of the section, without which payment shall not be made. Regular record showing dates and quantity supplied will be maintained by the Inspector. This shall also be witnesses by contractor or his representative. The contractor shall be responsible for bringing portable water through kutcha or pucca routes. Nothing extra will be paid for crossing nallah, bridges, tracks etc. and other eventuality. I agree to abide by the above conditions.
PlaceDate-
Signature Not Verified Digitally signed by DHARM CHAND SHARMA Date: 2018.04.28 15:16:57 IST Reason: IREPS-CRIS Location: New Delhi
Signature of Tenderer/s Address-
STANDARDS OF QUALITY OF DRINKING WATER PHYSICAL AND CHEMICAL STANDARDS S.No. Characteristics
Requirement (Desirable limit)
Permissible limit in the absence of alternate source
1 1
2 Turbidity (NTU scale) 5.0
3 10
4
2
Colour Haten units 5.0
25
3
Taste and odour
Unobjectionable
4
Ph value
6.5 to 8.5
5
2000
7
Total dissolved solids (mg/I) 500 max. Total hardness as CaCo3(mg/I) 300 max. Chlorides as CI2 (mg/I) 250
8
Sulphates as SO4 (mg/I) max
200
400
9
Fluorides as F (mg/I) max.
1
1.5
10
Nitrates as No3 (mg/I) max.
45
100
11
Calcium as Ca (mg/I) max.
75
200
12
Iron as Fe (mg/I) max.
0.3
1
13
Zinc as Zn (mg/I) max.
5
15
14
Mineral oil (mg/I) max.
0.01
0.03
15
Copper as Cu (mg/I) max.
0.05
1.5
6
--No relaxation
600 1000
Toxic materials 16
Arsenic as As (mg/I) max.
0.05
No relaxation
17
Cadmium as Cd (mg/I) max.
0.01
-do-
18
Lead as Pb (mg/I) max.
0.05
-do-
19
Residual free Chlorine (mg/I) 0.2* --max. *when protection against viral infection is required, it should be min. 0.5 mg/I
PlaceDate-
Signature of Tenderer/s Address-
NS-2 & NS-3 Finishing walls with Snowcem :1. Material The cement paint shall conform to IS.5410 and be of approved brand and manufacture. The cement paint shall be brought to the site of work by the contractor in its original container in sealed condition. The material to be brought in at a time shall be adequate to cover the whole work or atleast a fortnight’s work. The materials shall be kept in the joint custody of the Contractor and the Engineer. The empties shall not be removed from the site of work till the relevant item of the work has been completed and permission obtained from the Engineer. 2. Preparation of Surface :- In old work, all loose pieces and scales shall be removed and the surface shall be scrubbed thoroughly to clear dirt, dust and algae etc by brushing and washing with water. To give an even and smooth surface, sand papering where found necessary shall be used. Holes and pittings in plaster shall be made good by applying cement putty. A coat of water proof cement paint shall be applied over these patches after wetting them thoroughly. 3. Preparation of mix : Cement paint shall be mixed in such quantities as can be used up within an hour of its mixing as otherwise the mixture will set and thicken, affecting flow and finish. Cement paint shall be mixed with water in two stages. The first stage shall comprise of 2 parts of cement paint and one part of water stirred thoroughly and allowed to stand for 5 minutes. Care shall be taken to add the cement paint gradually to the water and not vice versa. The second stage shall comprise of adding further one part of water to the mix and stirring thoroughly to obtain a liquid of workable and uniform consistency. In all cases the manufacturer's instructions shall be followed meticulously. The lids of cement paint drums shall be kept tightly closed when not in use, as by exposure to atmosphere the cement paint rapidly becomes air set due to its hygroscopic qualities. In case of cement paint brought in gunny bags, once the bag is opened, the contents should be consumed in full on the day of its opening. If the same is not likely to be consumed in full, the balance quantity should be transferred and preserved in an airtight container to avoid its exposure to atmosphere. 4. Application 4.1 The solution shall be applied on the clean and wetted surface with brushes or spraying machine. The solution shall be kept well stirred during the period of application. It shall be applied on the surface which is on the shady side of the building so that the direct heat of the sun on the surface is avoided. The method of application of cement paint shall be as per manufacturer's specification. The completed surface shall be watered after the day's work. 4.2 The second coat shall be applied after the first coat has been set for at least 24 hours. Before application of the second or subsequent coats, the surface of the previous coat shall not be wetted.. 4.3 In old work, the treatment shall be with one or more coats as found necessary to get a uniform shade. 4.4 Precaution : Water proof cement paint shall not be applied on surfaces already treated with white wash, colour wash, distemper dry or oil bound, varnishes, paints etc. It shall not be applied on gypsum, wood and metal surfaces. If Water Proof Cement Paint is required to be applied on existing surfaces previously treated with white wash, colour wash etc, the surface shall be thoroughly cleaned by scrapping off all the white wash, colour wash etc., completely. Thereafter a coat of cement primer shall be
applied followed by two or more coats of water proof cement paint. 5. Other Specifications : Scaffolding 5.1 Wherever scaffolding is necessary, it shall be erected on double supports tied together by horizontal pieces, over which scaffolding planks shall be fixed. No ballies, bamboos or planks shall rest on or touch the surface, which is being white washed. 5.2. For all exposed brick work or tile work, double scaffolding having two sets of vertical supports shall be provided. The supports shall be sound and strong, tied together with horizontal pieces over which scaffolding planks shall be fixed. In case of special type of brick work, scaffolding shall be got approved from Engineer in advance. 5.3 Where ladders are used, pieces of old gunny bags shall be tied on their tops to avoid damage or scratches to walls. 5.4 For white washing the ceiling, proper stage scaffolding shall be erected. 6. Rate : The rate shall include the cost of all labour and materials involved in all the above operations described above. NS-4 & NS-5 OIL BOUND WASHABLE DISTEMPERING :1. Materials :- Oil Bound washable distemper (IS.428)) of approved brand and manufacture shall be used. The distemper shall be diluted with water or any other prescribed thinner in a manner recommended by the manufacturer. Only sufficient quantity of distemper required for day's work shall be prepared. The distemper shall be brought by the contractor in sealed tins in sufficient quantities at a time to suffice for a fortnight's work, and the same shall be kept in the joint custody of the contractor and the Engineer. The empty tins shall not be removed from the site of work, till this item-of work has been completed and passed by the Engineer. 2. Preparation of the Surface 2.1 In old work, all loose pieces and scales shall be removed by sand papering. The surface shall be cleaned of all grease, dirt etc. Pitting in plaster shall be made good with plaster of paris mixed with the colour to be used. The surface shall then be rubbed down again with a fine grade sand paper and made smooth. A coat of the distemper shall be applied over the patches. The patched surface shall be allowed to dry thoroughly before the regular coat of distemper is applied.
3. Application 3.1 Distemper Coat : In old work the distemper shall be applied over the prepared surface in the same manner as in new work. One or more coats of distemper as are found necessary shall be applied to obtain an even and uniform shade. 15 cm double bristled distemper brushes shall be used. After each day’s work, brushes shall be thoroughly washed in hot water with soap solution and hung down to dry. Old brushes which are dirty and caked with distemper shall not be used on the work. 4 Other Specifications : Scaffolding 4.1 Wherever scaffolding is necessary, it shall be erected on double supports tied together by horizontal pieces, over which scaffolding planks shall be fixed. No ballies, bamboos or planks shall rest on or touch the surface, which is being white washed.
4.2. For all exposed brick work or tile work, double scaffolding having two sets of vertical supports shall be provided. The supports shall be sound and strong, tied together with horizontal pieces over which scaffolding planks shall be fixed. In case of special type of brick work, scaffolding shall be got approved from Engineer in advance. 4.3 Where ladders are used, pieces of old gunny bags shall be tied on their tops to avoid damage or scratches to walls. 4.4 For white washing the ceiling, proper stage scaffolding shall be erected. 5. Rate : The rate shall include the cost of all labour and materials involved in all the above operations described above.
PlaceDate-
Signature of Tenderer/s Address-
