Decision 590/QD-BXD 2014 estimated norms of potable water production and water supply network management, operation

DECISION

On publicizing the estimated norms of potable water production and water supply network management and operation

__________

THE MINISTER OF CONSTRUCTION

Pursuant to Decree No. 62/2013/ND-CP dated June 25, 2013 of the Government defining the functions, tasks, powers and organizational structure of the Ministry of Construction;

Pursuant to Decree No. 117/2007/ND-CP dated July 11, 2007 of the Government on potable water production, supply and consumption; Decree No. 124/2011/ND-CP dated December 28, 2011 of the Government amending and supplementing a number of articles of the Government's Decree No. 117/2007/ND-CP dated July 11, 2007 on potable water production, supply and consumption;

Pursuant to Joint Circular No. 75/2012/TTLT-BTC-BXD-BNNPTNT of the Ministry of Finance, the Ministry of Construction and the Ministry of Agriculture and Rural Development providing principles and methods to determine and powers to decide on potable water consumption prices in urban areas, industrial zones and rural areas;

At the proposal of the Director of the Construction Economics Department, the Director of the Technical Infrastructure Agency, and the Director of the Institute of Construction Economics,

HEREBY DECIDES

Article 1. To publicize the estimated norms of potable water production and water supply network management and operation together with this Decision as a reference for relevant organizations and individuals to determine and manage potable water consumption prices.

Article 2. This Decision takes effect from June 1, 2014.

Part I

EXPLANATIONS AND INSTRUCTIONS
FOR APPLYING THE NORMS

1. The estimated norms of potable water production and the water supply network management and operation publicized therein include necessary wastes of raw materials, electricity, labor, and equipment for production and consumption of a specific quantity of potable water produced in common technological processes of water production, water supply network management and operation.

2. Estimated norms shall be calculated on the following bases:

- The technological process for potable water production that is suitable to the water source that can be extracted (surface water or groundwater) and is commonly used in each locality.

- The water supply network management and operation process commonly used in each locality currently.

- Summaries and statistics of localities on relevant technological processes of potable water production, water supply network management and operation as mentioned above.

- The actual production of potable water and application of scientific, technical advances to the actual production and supply of potable water in the localities currently.

- Regulation QCVN 08:2008/BTNMT promulgated under Decision No. 16/2008/QD-BTNMT dated December 31, 2008 of the Minister of Natural Resources and Environment (National technical regulation on surface water quality).

- Regulation QCVN 09:2008/BTNMT promulgated under Decision No. 16/2008/QD-BTNMT dated December 31, 2008 of the Minister of Natural Resources and Environment (National technical regulation on groundwater quality).

- Regulation QCVN 01:2009/BYT promulgated together with Circular No. 04/2009/TT-BYT dated June 17, 2009 of the Minister of Health (National technical regulation on drinking water quality).

- Regulation QCVN 02:2009/BYT promulgated together with Circular No. 05/2009/TT-BYT dated June 17, 2009 of the Minister of Health (National technical regulation on domestic water quality).

3. Structure of the set of norms

- The set of estimated norms of potable water production and water supply network management and operation therein includes 07 tables of norms presented in line with the technological process for production of potable water (from groundwater and surface water) and the process for water supply network management and operation.

- Each norm includes: work items, value frame of norms, technical requirements and appropriate units of measurement.

4. The application herein shall be done as follows:

- The publicized estimated norms for potable water production, water supply network management and operation serve as references to determine and manage potable water prices.

- Depending on actual conditions of each locality (the quality of the water source, the organization of production, the actual organization of the water supply network, the actual management of consumers and the water supply network, etc.), the Departments of Construction of provinces and centrally-run cities shall  assume the prime responsibility for considering and determining the appropriate norms regarding wastes within the norm frame (for the publicized normative wastes within the waste frame) to serve as a basis for determining the potable water prices which then shall be submitted to competent authorities for approval thereof.

- In cases where the production of potable water and the management and operation of the local water supply network have their own particularities and where the application of the publicized norms is not appropriate or there are no publicized norms, the Departments of Construction of provinces and centrally-run cities shall assume the prime responsibility for adjusting the norms or calculating new norms, then submit them to the People's Committees of the provinces and centrally-run cities to decide on the application thereof, and at the same time report them to the Ministry of Construction for monitoring and inspection thereof.

Part II

NORMS

Chapter 1

POTABLE WATER PRODUCTION

NS1.01.00. PRODUCTION OF POTABLE WATER FROM GROUNDWATER

1. COMPLETE TECHNOLOGICAL PROCESS FOR PURIFICATION OF GROUNDWATER (WITH HIGH CONCENTRATION OF IRON AND MANGANESE, LOW PH VALUES, DIFFICULT TO BE PURIFIED).

2. WORK ITEMS.

a) Operating wells (Pumping Station I)

- Monitoring the electrical system;

- Monitoring dynamic and static water levels in wells;

- Monitoring sand content in groundwater;

- Setting technical parameters of pumps (their flow, pressure, amperage, voltage, etc.);

- Operating the pumps with the technical parameters during the working process;

- Monitoring operations of the pumps (their vibration, noise, temperature, etc.);

- Cleaning the pumps and motors;

- Cleaning the area of Pumping Station I and intake channels;

- Recording the technical parameters;

- Switching shifts.

b) Operating aeration sprayers - settling tanks

- Operating the valves of aeration sprayers and settling tanks;

- Monitoring the working mode of the aeration sprayers and settling tanks (the system of sprayers, the water level in the settling tanks, the stability of water in the tanks, water flows, etc.);

- Taking out discharge of the settling tanks periodically;

- Cleaning aeration sprayers, settling tanks (daily slightly cleaning);

- Regularly checking other equipment (Valves, piping system, etc.).

c) Operating filter tanks

- Opening and closing the valves in the process, including opening and closing the valves of the filter tank, periodically taking out discharge of the filters (every 24 hours, on average);

- Cleaning the filter tanks (tanks, intake troughs, etc.) and the control system, checking the control system, water and air valves, piping system;

- Monitoring operations of the filter tanks (the stability of the water levels in the filter tanks, checking the water inflow from the settling tanks);

- Recording work progress and incidents.

d) Operating reservoirs

- Monitoring the water level in the reservoirs, the amount of sediments in the reservoirs, the occurrence of incidents (leakage, etc.);

- Periodically cleaning the reservoirs.

e) Operating Pumping Station II

- Operating the pumps (changing the working mode of the pumps) in accordance with the requirements of the consumption network;

- Operating air pumps, technical pumps, and filter washing pumps when washing filters;

- Monitoring the electrical system (including the inverter system, if any);

- Setting technical parameters of the pumps (their flow, pressure, amperage, voltage, etc.);

- Operating the pumps in the optimal operating mode;

- Monitoring operations of the pumps (the vibration, noise, cooling water temperature of the pumping station, the engines, etc.);

- Cleaning the pumps and the pumping station;

- Recording technical parameters;

- Switching shifts.

f) Operating the chemical mixing station (including mixing lime and alum)

- Receiving the indicated amount of chemical substances at the request of the laboratory;

- Operating equipment for weighing and mixing the chemical substances (lime, alum);

- Operating stirrers and metering pumps;

- Monitoring the working mode of the stirrers, the metering pumps according to the technical requirements (the flow, pressure, rotation, amperage, voltage, working status of the stirrers or pumps, etc.);

- Adjusting and monitoring the water valves, monitoring the water levels in the tanks, the amount of lime and alum stored in the warehouses, etc.

- Recording the happenings.

g) Operating the chlorination station

- Operating chlorine filling machines, mixing water pumps as required;

- Checking chlorine concentration in the air;

- Cleaning equipment and containers, conducting industrial cleanups;

- Checking the concentration of residual chlorine at the reservoirs as required;

- Checking the insurance system (injectors, pumps, masks, etc.);

- Recording technical parameters as required.

h) Operating the laboratory

- Taking samples to test the source water and the treated water (once a day);

- Samples taken once in one shift (pH, turbidity);

- Checking alum and lime daily to determine the necessary amount of alum and lime;

- Checking and analyzing water quality parameters as required.

i) Operating the sludge settling system

- Receiving water discharged from the settling tanks and filter tanks;

- Operating the water pumps after sedimentation according to working requirements;

- Transporting sludge to drying beds to be dried and taken away;

- Operating sludge pumps according to working requirements.

j) Cleaning the treatment station

- Cleaning the treatment station, watering and taking care of plants, etc.

3. TECHNICAL REQUIREMENTS

- Potable water must meet the prescribed standards.

- The water pressure recorded after the primary meter must be ensured in accordance with regulations.

4. TABLE OF NORMS:

Quantity: 1m³

Notes:

- The norms specified in the above table correspond to the quality of groundwater to be treated and potable water after treatment as specified in the attached appendix.

- The waste of electricity specified in the above table corresponds to the following conditions:

a) The average distance from the water intake work to the water treatment area is £3,500 m; For each subsequent 1,000 m, the power rating shall be adjusted by a coefficient K = 1.025

b) The average height between the water intake work and the water treatment area is £55 m. For every 10m higher to the subsequent water level, the power rating shall be adjusted by the coefficient K = 1.1

NS1.02.00 PRODUCTION OF POTABLE WATER FROM SURFACE WATER

1. COMPLETE TECHNOLOGICAL PROCESS FOR PURIFICATION OF SURFACE WATER (WITH HIGH TURBIDITY, LOW PH VALUES, DIFFICULT TO BE PURIFIED).

2. WORK ITEMS.

a) Operating the riverbank pumping station (Pumping Station I)

- Monitoring the electrical system;

- Monitoring river and lake water levels;

- Setting technical parameters of the pumps (their flow pressure, amperage, voltage, etc.);

- Adding chlorines to the water intake;

- Checking the concentration of residual chlorine in raw water;

- Operating pumps according to working requirements;

- Monitoring operations of the pumps (their vibration, noise, temperature, etc.);

- Monitoring the operations of the garbage screens (if any);

- Cleaning the pumps and bar screens;

- Cleaning the area of Pumping Station I and the intake channels;

- Checking the stability of the intake channels;

- Recording technical parameters;

- Switching shifts.

b) Operating screening, coagulation, flocculation tanks

- Operating the valves of the screening, coagulation, flocculation tanks

- Monitoring the working mode of the screening, coagulation, flocculation tanks;

- Regularly checking other equipment (Valves, piping systems);

- Checking and monitoring the chemical input;

- Cleaning the screening, coagulation, flocculation tanks (daily slightly cleaning);

c) Operating settling tanks (including vertical, horizontal, radial tanks, etc.)

- Operating settling tanks as required;

- Checking and monitoring the working mode of the settling tanks;

- Taking out discharge periodically;

- Cleaning the settling tanks (their basins and walls);

- Checking equipment (Valves, pipes, scrapers, sludge pumps and other equipment, etc.).

d) Operating filter tanks

- Operating filter tanks as required, opening and closing the valves of the filter tank, periodically taking out discharge of the filters (washing the filter tanks) periodically (every 24 hours or every 16 hours, on average, depending on the quality of the water source);

- Cleaning the filter tanks (tanks, intake troughs, etc.) and the control system, checking the control system, water and air valves, piping system;

- Monitoring operations of the filter tanks (the stability of the water levels in the filter tanks, checking the water inflow from the settling tanks);

- Recording work progress and incidents.

e) Operating reservoirs

- Monitoring the water level in the reservoirs, the occurrence of incidents (leakage, etc.);

- Periodically cleaning the reservoirs.

f) Operating Pumping Station II

- Operating the pumps (changing the working mode of the pumps) in accordance with the requirements of the consumption network;

- Operating air pumps, technical pumps, and filter washing pumps when washing filters;

- Monitoring the electrical system (including the inverter system, if any);

- Setting technical parameters of the pumps (their flow, pressure, amperage, voltage, etc.);

- Operating the pumps in the optimal operating mode;

- Monitoring operations of the pumps (the vibration, noise, cooling water temperature of the pumping station, the engines, etc.);

- Cleaning the pumps and the pumping station;

- Recording technical parameters;

- Switching shifts.

f) Operating the chemical mixing station (including mixing lime and alum)

- Receiving the indicated amount of chemical substances at the request of the laboratory;

- Operating equipment for weighing and mixing the chemical substances (lime, alum);

- Operating stirrers and metering pumps;

- Monitoring the working mode of the stirrers, the metering pumps according to the technical requirements (the flow, pressure, rotation, amperage, voltage, working status of the stirrers or pumps, etc.);

- Adjusting and monitoring the water valves, monitoring the water levels in the tanks, the amount of lime and alum stored in the warehouses, etc.

- Recording the happenings.

g) Operating the chlorination station

- Operating chlorine filling machines, mixing water pumps as required;

- Checking chlorine concentration in the air;

- Checking the insurance system (injectors, pumps, masks, etc.);

- Checking chlorine containers and warehouses;

- Conducting industrial cleanups;

- Recording technical parameters as required.

h) Operating the laboratory

- Taking samples to test the source water and the treated water (once a day);

- Samples taken once in one shift (pH, turbidity);

- Checking alum and lime daily to determine the necessary amount of alum and lime;

- Checking and analyzing water quality parameters as required.

i) Operating the sludge settling system

- Receiving water discharged from the settling tanks and filter tanks;

- Operating the water pumps after sedimentation;

- Transporting sludge to drying beds to be dried and taken away;

- Operating sludge pumps.

j) Cleaning the treatment station

- Cleaning the treatment station, etc.

3. TECHNICAL REQUIREMENTS

- Potable water must meet the prescribed standards.

- The water pressure recorded after the primary meter must be ensured in accordance with regulations.

4. TABLE OF NORMS:

Quantity: 1m³

Notes:

- The norms specified in the above table correspond to the quality of groundwater to be treated and potable water after treatment as specified in the attached appendix.

- The waste of electricity specified in the above table corresponds to the following conditions:

a) The average distance from the water intake work to the water treatment area is £4,000 m; For each subsequent 1,000 m, the power rating shall be adjusted by a coefficient K = 1.025

b) The average height between the water intake work and the water treatment area is £20 m. For every 10 m higher to the subsequent water level, the power rating shall be adjusted by the coefficient K = 1.1

Chapter 2

WATER SUPPLY NETWORK MANAGEMENT AND OPERATION

NS2.01.00 CONSUMER MANAGEMENT

1. WORK ITEMS

1.1. Recording, reading meters and managing consumers.

a. Recording and reading meters:

- Taking the meter reading book, going to each consumer's house to read and record the meter readings in the book. Determining the price based on the used amount of water for each use purpose. Informing the consumers about the amount of water they have to pay for in the month.

- Giving the book to the computing department to generate the water bills.

- Receiving the list of bills, reviewing the large and extraordinary consumption of consumers (if any), and giving it to the computing department for correction before printing the bills.

b. Managing consumers:

- Identifying the causes for breakdowns of water meters or the sudden increase or decrease in water consumption.

- Checking the operational status and locations of the water meters, detecting the damage of the meters (such as blurred face, broken lead clamps, broken lead, etc.). Recording their codes correctly.

- Checking the currently water supply of the consumers to detect leaks as well as violations of water use regulations (if any).

- Making written requests and transferring them to relevant units for settlement.

- Preparing dossiers and contracts of new consumers in the month.

1.2. Making and printing water bills.

a. Making the bills:

- Updating the data in the meter reading book and the control book into the invoicing software.

- Calculating and issuing bills (automatically in the system): Recording the total number of issued bills in the books.

b. Managing consumers:

- Regularly updating changes in the information of consumers.

- Monitoring and analyzing the data to evaluate business performance.

- Storing the bill stubs: the 1^st copy of a bill, after data thereof being entered into the bill collection management, debt checking and tracking systems.

- Summarizing the collected bills: On the last day of the month, after finishing the work of entering data of the bills, the computing department shall print a report summarizing the total collected bills in the whole month for the treasurers to compare and balance in the private cash or the agency’s cash paid in the month.

c. Printing:

- Printing documents for recording and managing consumers (meter reading books, control books, statements, payment receipts... information for checking and controlling... printing summary reports)

- Printing bills: Recording the first and last serial numbers of each printed bill block, checking and comparing the number of bills. Summarizing bills.

- Printing contracts of new consumers.

1.3. Collecting water bills and tracking debts.

- Receiving and checking the quantity and quality of printed bills. Collecting bills at each consumer's house according to the order recorded by the meter readers.

- Summarizing the collected amount of money in the 1^st copies of bills and depositing such money into the fund. At the end of each day, 1 copy shall be given to the treasurer and 1 copy to the Finance and Accounting department to balance the actual cash deposited into the fund.

- Notifying and verifying debts. Giving notices to suspend or stop water supply.

- Summarizing outstanding bills: After the end of the last payment day of the month, the collectors must be responsible for self-inventory of the outstanding bills currently kept. They shall make a detailed list of consumers who owe bills in the month, aggregating the bills and the debts of each month. Analyzing in detail the reasons why consumers still owe water bills.

1.4. Answering questions, settling disputes, handling violations of consumers and other entities within the scope of management.

a. Answering questions and settling disputes:

- Verifying the problems, coordinating with relevant departments inside and outside the information-receiving unit.

- Making records of the settlement of problems.

- Answering questions and settling relevant disputes.

b. Inspecting violations:

- Based on the data of the bill recording and collection management system, in the cases of unusual consumption by consumers or at the request of the meter readers.

- Conducting on-the-site inspections. Making records of the inspections on the water use of the consumer.

- Collecting evidence of violations against the terms of the water use contracts. Determining the extent of the violations. Making records of the violations and proposing solutions

2. TABLE OF NORMS

Unit: 1,000 consumers/month

NS2.02.00 WATER SUPPLY NETWORK MANAGEMENT AND OPERATION

1. WORK ITEMS

a) Technical management:

- Managing the current status of the water supply network on the map, including regular updates on network changes and network asset statistics

- Planning the division of the network so as to manage loss of revenue.

- Coordinating with units possessing underground works to conduct projects to ensure the safety of the water supply network.

b) Pressure management:

- Collecting and updating daily water pressure of the water supply network.

c) Flow management:

- Collecting and updating daily water flow of the water supply network.

d) Managing pipelines and devices on the network:

- Make plans to check the pipelines as well as the valve caps, valves, maintenance holes, meters.

- Checking daily assets, operating status of pipes and equipment on the water supply network. Detect and repair problems.

d) Operating the network:

- Proposing operational plans based on the pressure and flow data.

- Operating the network according to the approved plans.

- Updating the operational plans onto the dossier.

e) Managing the water quality

- On the transmission line: Taking samples to evaluate the water quality at the connection points between the transmission network and the water distribution network into the metered area (or nearby), the end points of water supply of factories or places adjacent to drainage works prone to contamination.

- On the distribution route and service network: Taking samples to evaluate the water quality at the end points of water supply, heights, areas with hourly water supply, or consumers’ houses.

2. TABLE OF NORMS

Unit: 1km/month

Notes: The nominative wastes specified in the above table do not include the waste for testing water quality in the water supply network management process. The nominative waste of samples is specified in Section NS2.06.00 - Waste of samples for analysis and management of water quality.

NS2.03.00 MAINTENANCE OF EQUIPMENT ON THE WATER SUPPLY NETWORK AND FLUSHING OF WATER SUPPLY PIPES

1. WORK ITEMS

a) Maintaining electromagnetic and mechanical clocks:

- Pumping water and dredging mud to clean manholes.

- Checking the sensor for measuring the flow of connection points; checking and calibrating resistor and electrode parameters

- Conducting industrial hygiene: equipment in cabinets and connection cables.

- Inspecting the electrical and grounding systems

- Checking the display: clean the IC; measuring and setting specifications.

b) Flushing pipelines:

- Preparing the ground at the flushing point, opening the sludge discharge valve (remove the flange at the discharge port).

- Operating the water supply network to flush pipes.

- Closing the sludge discharge valve. Operating the network to return to its original state.

- Cleaning and returning the premises.

c) Maintaining gate valves, butterfly valves, drain valves and manholes:

- Pumping water and dredging mud to clean manholes.

- Check the condition of valves. Removing the valves from the system and cleaning their outside.

- Removing and cleaning their inside and other details.

- Removing, cleaning and maintaining the transmission set and valve seat.

- Assembling the valves and paint the valve covers to anti-rust according to the specified color.

d) Lifting door locks and manhole covers:

- Check the condition of door locks and manhole covers, removing them from the system and cleaning the manholes.

- Lifting the valves to install pipe locks and manhole covers.

- Completing the installation and plastering to return the road surface.

2. TABLE OF NORMS

Unit: 1 km/month

Note:

The above norms do not include the cost of repair and replacement of equipment, meters, valves, and labor tools.

NS2.04.00 OPERATION OF BOOSTER PUMPING STATIONS

1. WORK ITEMS

a) When the water pump is not running:

- Cleaning equipment, pump house, inside and outside the pumping station.

- Checking the tanks and transmission pipes from the pumping station. Checking for residual chlorine if additional amount is needed.

b) When the water pump is running:

- Complying with the technical procedures before turning on the machine and after running the pump. Regularly monitoring technical indicators such as: voltmeter, amp, operating status of the machine, pump head pressure gauge, 1-way valve, 2-way valve, etc.

- Inspecting water quality, residual chlorine indicators at the storage tank every 1 hour for the 24h/24h working station.

- Regularly monitoring the water level in the storage tank.

c) Stopping the water pump:

- Logging the pump’s operation

- Cleaning equipment.

2. TABLES OF NORMS

Unit: 100m3

Notes:

- The norms specified in the above table determine the average wastes for stations with capacity from 50 ÷ 500 m3/day.

- The normative wastes specified in the above table do not include the wastes of water quality analysis according to the regulations of the Ministry of Health and the consumption of electricity. The norms of wastes of samples for water quality analysis are specified in Section NS2.06.00 - Wastes of samples for analysis of water quality management.

- The waste of electricity specified in the above table applies when the booster pump pressure is £ 55 m. For each next 10m difference in water level, the electricity norm is adjusted by the coefficient K = 1.1

NS2.05.00 MAINTENANCE OF BOOSTER PUMPING STATIONS

1. WORK ITEMS

a) Maintaining the station shell:

- Cleaning and whitewashing 2 layers of station houses and fences

- Repainting the station doors and entrance doors.

b) Maintaining water tanks:

- Periodically cleaning and checking the water tanks according to the technical process.

- Whitewashing the tank wall.

- Sanitizing and cleaning storage tanks.

c) Maintaining technology:

- Cleaning, scrubbing and applying anti-rust paint to technology pipes.

- Maintaining pumps and motors:

+ Receiving, transporting materials, dismantling pumps, dismantling engines and checking equipment hygiene.

+ Pumps: Removing the bearings, washing the old grease, changing the new grease and periodically replacing the bearings.

+ Motors: Disassembling and checking motors, cleaning the rotor and stator, replacing the motor shaft bearings and greasing the bearings. Checking and fixing insulation loss, checking parameters, installing alignment.

+ Checking and calibrating the pump motor shaft coupling; assembling the pumps and motors. Checking the operation, recording technical specifications and handing over to management units.

d) Maintaining electrical parts:

- Checking and cleaning electrical cabinets and electrical equipment.

- Checking and cleaning the wire racks, junction boxes, wires, sockets.

- Tightening the terminals and connectors.

- Checking the grounding systems.

2. TABLE OF NORMS

Unit: Station/year

Notes:

- The norms specified in the above table determine the average wastes for stations with capacity from 50 ÷ 500 m3/day and night.

- The above norms do not include the cost of repair and replacement of machines and equipment.

NS2.06.00 THE WASTES OF SAMPLES FOR ANALYSIS OF WATER QUALITY MANAGEMENT

1. MANAGEMENT AND OPERATION OF WATER SUPPLY NETWORK

TABLE OF NORMS

Unit: 1km/month

2. OPERATION OF PRESSURE PUMP STATIONS

TABLE OF NORMS

Unit: 100m3