PROVIDING RSF TO CPWS SCHEME TO GUDIMELLANKA IN DR.B.R.A.KONASEEMA DISTRICT

Design, Construction, Testing, Commisioning and Maintaining of water treatment plant of 6.0MLD Capacity Rapid Sand Filters at head works with M 30 grade design mix including ivil, mechanical and electrical works using sand as filter media, compatible to SCADA arrangements duly following relevant IS codes in the design of Plant components including trial running for 90 days trial running etc. inclduing chlorine contact tank and consumable etc., complete - M30 Grade concrete including cost & conveyance of all materials, cost & fabriation of steel, labour charges and testing the structure for water tightness etc., complete for finished item of work ibut excluding GST and seignourage charges but including Overheads and contractors profit @ 13.615%.

All components of the filtration plant are as per SSR 2025-26

The above rates of Filtration Plants shall include all the following components.

A) Civil Works (All works of VRCC Shall be in M30 design mix)

1). Stilling Chamber and Aeration cascade

2) Pre settling tank shall be provided for 30 MLD and above capacities of WTP for a minimum of 1 hr capacity.

3). Raw water channel with Stainless Steel Weir of SS 304 L Grade material and also with digital flow meters

4) Flash Mixer chamber with Flash mixing arrangements including SS shaft & SS Blades with gear wheel arrangements etc, using 304 L Grade Steel.

5-a) Clariflocculator / Flocculation tanks with the components of central driven circular clarifier with scrapper & bridge arrangements made with Stainless Steel Grade 304 L tubes /angular for durability & chemical resistant with wheel arrangements etc,

5-b) Two numbers of Clariflocculator shall be provided for WTP's of more than 30 MLD capacity.

6) Filter house, Chemical house, Alum store, Laboratory room, Chlorination plant room, toilet etc. (All structures shall be provided RCC roof only).Chemical house & Chlorinator rooms are to be isolated and shall be as per CPHEEO manual.

7) Wash water tank of suitable capacity shall be constructed at minimum clearance of 2.00m, above the roof slab of Filter beds / any other structure, and the minimum residual head at the top of under drain system shall not be less than 8.0 meters.

8) Chlorine contact tank

9) All the Doors and Windows shall be of Best Teak wood/Aluminium / UPVC make, except entrance door. The entrance door including shutter in filter house shall be with best teak wood of minimum size of 2.40 X 2.40 mts. a) Main Doors of all individual Buildings shall be made of Best Teak wood b) Other Internal Doors of the buildings shall be of Compressed wood/ Aluminium/ UPVC materials. c) Ventilators shall be provided for each building/structure of suitable size as per NBC standards.

10) a) All pipes in Plant shall be of D.I., D/F materials. All Connecting pipes of the plant components such as from Flash mixer to Clarifloculator/ Clarifier/Flocculation tank, to Filter beds, sludge disposal pipes shall be of D.I., D/F material. The size of sludge disposal pipe shall be minimum of 450 mm dia. with D.I D/F pipe and minimum length of 100 meters.

b) All the Valves in Plant shall be heavy duty and as per the specification of SoR i

11) The Pipe gallery way for Clear water/ Back wash water/ pipe connections shall be sufficiently spaced for easy operation & maintenance and inspection, as per standard norms.

12) The bottom level of the wash water control chamber must be above G.L so as to dispose the wash water and sludge from Clariflocculator by gravity to disposal point.

Additional specifications

13) Railing for all the components (Clarifloculator, Filter House, Staircase etc,.) shall be provided with Stainless Steel of grade 304 for a height of 1.00m, with 40mm dia. pipe for top horizotals,25mm dia. for middle row and 40mm dia. verticals spaced at interval of not more than 1.00m c/c.

14) Inspection / Path ways in filter beds: Middle pathway: Minimum of 1.50m, Side pathway: Minimum of 1.20m

15) Flooring in the buildings (Filter house, Chemical House, Chlorinator Room, Laboratory) shall be provided with Non-skid tiles of approved make & quality, as per standard specifications.

16) The basement of the Filtration plant building shall be minimum of 1.20m above the existing nearby Road top level.

17) Minimum head room of 2.00m shall be provided, at the alum mixing chambers in alum store for inspection & maintenance.

18) The minimum width of entrance hall for the Filter House shall be 4.50m, and Laboratory of min size .of 3.30 X 4.50m.

18) b) For various components of the WTP should be designed by considering the uplift pressure also.

19) a) High efficient Air Blowers shall be installed to the design requirement with low noise pollution, environmental pollution as per PCB guide lines & Testing of blowers as per I.S Standards at site. b) The Piping from Blower to Filter Beds shall be GI and submerged pipe in water shall be HDPE.

20) UPVC pipes shall be provided for under drain system. Filter pipe manifolds shall be assembled with HDPE pipes.

21) Alum storage capacity shall be designed for minimum period of 90 days. Consumables shall be provided for 2115 Running Hours of WTP.

22) Chlorinator : Vacuum type chlorinator shall be provided with following specifications: a) Vacuum operated solution feeding type Vacuum Regulator, Rotometer, Rate setting Valve, built-in NRV, Gas Overflow out let by man folding to mount the system with the unit. b) The unit shall consist of Ejector with necessary accessories such as Check Valve, Drain Valve and Vacuum relief Valves - for control of chlorinator dosage. c) The Accessories and manifolds shall be chlorine resistant and made of carbon steel seam less pipes, copper tube with brass fittings of suitable size & dimensions, with diaphragm sealed chlorine pressure gauge arrangements

d) Water Booster Pump of pumping capacity ranging from 2 cum/hr to 12 cum/hr, with Head ranging from 16 to 35 m e) The water & solution carrying pipes shall be made of UPVC material of suitable size incl. all specials such as Tee's , Bends, couplings & NRVs and also Pressure Gauges of suitable range. f) Chlorine Gas Leak detector with alarm indicator. The installation includes all necessary accessories, civil and mechanical works, manifold header installations, injector fixing, connection with UPVC pipes, solution piping’s, fixing of motors as per standard specifications and commissioning of Chlorination Plant to the required demand, with a defect liability period of 1 year. The chlorinator of may be of any reputed make or any make of Metito/Toshocow-Jesco

Siemens Industrial Devices. g) Life breathing apparatus. h) Chlorine escape BA set

i) 2 to 10 MLD Plants - 1Kg/hr Chlorinator- For Post Chlorination

ii) 10 MLD to 20 MLD Plants - 2 Kg/hr Chlorinator - For Post Chlorination.

iii) 20 MLD to 50 MLD Plants - 5 Kg/hr Chlorinator - For Post Chlorination.

B) Mechanical Equipment

1) Alum dosing equipment with SS 304 material made stirrers & paddles for chemical resistance. (Alum tanks must be bound with corrosion resistant material (HDPE Lining, Bitumen Coating, tiles etc)

2) Flash mixer equipment with SS 304 material made stirrers & paddles for chemical resistance.

3) Filtration plant equipment instrumentation and piping.

4) Clarifloccualation equipment (with stainless steel blades) with rotating bridge arrangement etc.,

5) Pneumatic tyre wheel shall be provided for the bridge clariflocculator.

6) Wash water tank fittings and pump sets with 100% stand by.

7) Air blower with motor of 100% stand by and pipe connections made with of SS pipes confirming to SS 304 Grade, in filter bed region.

8) Chlorination equipment and pipe connections with chlorinator of 100% standby.

9) Spares & Tools for 2 years.

10) Gaseous Chlorination with cylinders has to be provided with protection measures.

C) Electrical Equipment

1) Necessary power supply wiring to motors and switches bus bar connections as per IE Rules

2) Internal wiring and illumination and fittings and fixtures for internal and external lighting exhaust fans, ceiling fans etc.

3) Erecting mechanical and electrical equipment, trial run for 90 days at 23.50 hours per day testing the treated water as per CPHEEO standards and maintenance of records and imparting training to staff.

4) Supply of 6 - Sets of completion plans and maintenance manual and brochures.

5) All cables shall be of copper material, Cable ducts shall be covered with MS / Aluminium cheque plate.

6) Min LUX levels inside the treatment plant shall be maintained.

7) Yard lighting shall be provided as per norms.

D ) Equipment for Flow measurements

1) Equipment for measuring Conductivity, Turbidity, Ph value, Residual Chlorine with recording & data storage facility (Computer based) & Alarm by SMS or other methods.

2) Off - Site Supervisory and Data Acquisition (OSSADA) system for Raw water & Clear water flows by installing Digital Flow meters to measure the flows at Raw water Channel and at each filter bed individually and combined for measuring the quantities of water treated with a facility to record and store the readings & also to send messages to the assigned designatories about the variations/ deficiencies in the flow including alerts for back wash requirements of filter beds, and recovery of data for the past 360 days. All the Digital Flow Meters & Pressure Gauges shall be provided of standard approved make. The equipment shall have the following specifications.

i) Wall mounted Sensor House for measuring Raw water & Clear water flow from Filter bed out lets with accessories consists of

ii) Electrode Type: General type, Scraper type or replaceable type Electrode made with material of SS external Ultra Touch Sensors as per requirement.

iii) Customized Application Requirement : Sensors with Interface logic control board with serial interfaces, including accessories such as Add-on port, external DC Power Socket, On - sensor Board Buffer, Timer, RS485 Communication, Analog to Digital Sensing Sensor Circuit, 32 Sensors Sensing Tags, Interval Power Supply System , LCD 16c/2L, Filter Bed Working Status Indication LED, Filter Bed Wash Indication Button and memory of Data Storage for 30Days , status of Filter Bed Level indicator, Rating, Reading on LCB Display, Menu Driven Data for sending to Onsite Big Display, operated with Battery Power of any reputed make or any equalent make.

iv) Customized Application Requirement: Power Sensors Interface logic control board with support 8 Power Sensing tags, Central System Interfacing Communication, On - board analog to Digit Convert Integrate Circuit of any reputed make or any equalent make.

v) Customized Application Requirement: Centralized System with two serial interfaces, 3 No’s of Add-On ports, One external DC Power Socket, On - Board Buffer, On - Board Timer, On - Board RS485 Communication, On - Board RS 232 Communication, On - Board GPRS/GSM Module, On - Board Voice Chip, On - Board Power Sensing Module, LCD 16c/2L, Filter Bed Wash Precaution Indication with Stop Button, Memory of Data Storage for 30 Days, Total Bed Rating, Reading display on LCD Display, Menu Driven, Menu Navigate Keypad, sending data to the Web Server, Communication with GPRS , operated with Battery Power of any reputed make or any equalent make.

The software shall be designed with Web Domain with Data Base Server and Web Name as per the directions of the Departmental Authorities.

The application of Software for Web design & Desktop shall meet the following requirements:

i)Onsite Display: Letters with size of 1.5’ seven Segment LED Display with Interface for each Filter Bed, for Onsite Display, by displaying the Bed Levels, Ratings, Readings in 3 Columns, for each bed of the plant in successive rows and cumulative results at the bottom of the screen.

ii) Off Site Display: Letters with size of 1.5’ seven Segment LED Display with Interface GPRS/GSM Modules Offsite Display, with Display of Bed Total Rating, Total Cumulative Reading as specified on On-site Display Features.

The system shall have also the features of Onsite Bed Wash Voice Precautions for Bed Levels, Readings, Ratings, Bed Capacity Readings and Ratings and Bed Low Level Triggering, before & after Bed wash.

The software shall also have the features of sending messages to the mobiles of the Departmental designatories indicating Bed Low Levels, Power Supply timings, Bed Wash timings and its status, Power Supply timings and its status Grid View Table, Motor Working time and its status Grid View Table, all trigger events and schedule information and including all Snap View Reports, all Daily, Monthly, Yearly Reports, all Power Working Reports, all Power Events Information etc,.

Supply and delivery of 315mm dia, 6kgs/cm2 pipes HDPE PE-100 Pipes confirming to IS 4984/2016 with amendments & revisions. The rates are inclusive of cost, conveyance to site, loading and unloading charges and as directed by the Engineer-in-Charge including over heads and contractors profit @13.615% excluding GST.

Construction of pipe line for Drinking Water Supply with 315 mm dia, 6Kgs/cm2 HDPE PE-100 pipes including lowering, laying and jointing of pipeline as per IS7634-part-II/1975 with its amendments and revisions and as per Technical specifications as per requirements, lowering, laying and jointing of pipe lines with necessary HDPE specials true to alignment and gradient, trench excavation (Earth work excavation in all soils upto SDR using machine with 2/3rd and manual with 1/3rd) for pipelines in all soils except rock requring blasting and refilling trenches with excavated earth (other than rocky soils and boulders) with watering and tamping and removing surplus earth from site of work and filling the pipeline with water and hydro-testing to the required pressure etc., complete for finished item of work as per the Standard Specifications and as directed by the Department Engineers. The rates are inclusive of all labour charges, HDPE specials etc., complete for finished item of pipeline work, including overheads and contractors profit @13.615% for pumping mains and gravity mains for the following sizes but excluding GST and Seigniorage charges

Supply and delivery of 300mm dia MS Pipes eith 6mm thick confirming to IS 3589-2001 with amendments & revisions. The rates are inclusive of cost, conveyance to site, loading and unloading charges and as directed by the Engineer-in-Charge including over heads and contractors profit @13.615% excluding GST.