Water Treatment Management
Many water systems require some form of additional treatment program in order to work effectively and to prevent excessive levels of scale, corrosion and build up of sediments, as well as to maintain bacteria levels within acceptable limits. This is specifically the case with cooling towers, evaporative condensers and systems such as rainwater harvesting and grey-water recycling. In addition, though, it can also be the case that domestic water systems have some form of additional treatment added for a variety of reasons.
The range of different treatment options that are available can be overwhelming and it can be a considerable task to determine the most suitable and cost effective option in any particular scenario.
Treatment options can comprise but not be limited to any one or combination of the various methods listed below:
- Liquid chemical dosing via pumps with controlled feedback loop and individual sensors;
- Liquid chemical dosing with pumps via timers;
- Dosing of solid chemicals from dispensers or brominators;
- UV treatment;
- Reverse osmosis.
Selection of the most appropriate water treatment management system is vital in ensuring The growth of bacteria in water systems is a common cause of potentially-fatal Legionnaires’ disease. Recent outbreaks of Legionella have highlighted the need for stringent water hygiene risk mana... More standards.
What are the benefits?
Employing a third party consultancy such as the S2 Partnership, when deciding on a specific water treatment/control program on site can have the following benefits:
- Making the wrong decision can be very costly in the long run and is often only discovered with the aid of hindsight when it is too late. S2 Partnership consultants have a wealth of knowledge and experience of both water treatment and water hygiene control programs and their independence and impartiality will help site make the right decision and avoid choosing unsuitable costly options which ultimately may not work to their satisfaction.
- The whole process of implementing new strategies can be very time consuming and take away from any site/facilities manager’s core duties. The S2 Partnership, as independent third party consultants, can shoulder much of the burden and ensure that the whole process from initial planning and design, through to implementation, installation and testing of any new strategy is as quick and hassle free as possible.
How can the S2 Partnership help?
The S2 Partnership provides a comprehensive consultancy service from initial design stages through to the final stages of installation/implementation of any new strategy which involves the following:
- Initial desktop exercise at the design stage to ensure that all possible viable options are considered. Detailed analysis of the pros and cons of each option will be outlined;
- Costings/feasibility study carried out for each potential option considered. Lifetime costings can be presented, outlining not only initial capital expenditure, but also ongoing costs such as routine maintenance, energy requirements, waste disposal costs etc;
- Sourcing and vetting suitable contractors, putting together tender proposals and reviewing any potential tender submissions;
- Overseeing the installation of any new technologies and monitoring contractors during the installation/hand over period
- Ongoing and additional monitoring of any new strategy;
- Updating policies, procedures, method statements and risk assessments to reflect all relevant changes.
S2 Partnership provides a comprehensive service to audit and manage the level of Legionella compliance/control on any site, which involves the following:
- site survey of all relevant assets and plant to include a detailed condition survey outlining all faults and listing all necessary remedial actions required to ensure the water services on-site comply with the requirements of not only ACOP L8, but also other guidance documents and regulations, such as the Water Supply (Water Fittings) Regulations 1999;
- audit of all Legionella control activities on-site, including all tasks carried out by sub-contractors and to include an assessment of the competency of all people involved in the management and control of Legionella bacteria;
- provision of all documentation relevant to Legionella control, including policies and procedures method statements, emergency procedures, log books, log sheets and risk assessments;
- designing and delivering specific training programmes aimed at ensuring competency of on-site maintenance staff, managers and Responsible Persons/Duty Holders; and
- carrying out sampling to prove the effectiveness of control regimes.
As part of your obligations to comply with current legislation and codes of practice governing the control and management of legionella (COSHH, RIDDOR, HSWA, MHSWA, Notification of Cooling Towers and Evaporative Condensers Regulations, ACOP L8). The following is required from clients for water systems that they manage:
- The need to carry out a suitable and sufficient risk assessment
- The need to prepare a scheme for preventing or controlling the risk
- The need to implement, manage and monitor precautions
- The need to keep records of the precautions
- The need to appoint a person to managerial responsibility
It is the client’s responsibility to maintain all records pertinent to the control of legionella on site and to determine where these records will be kept. Records are to be maintained for a period of five years.
S2 Partnership assists in the production of a written scheme, but this will also require input from the client and their appointed M+E contractors and water treatment contractors. The elements of the written scheme as outlined below are assessed and audited at the time of the risk assessment and where necessary actions raised in the risk assessment to indicate where improvements need to be made to achieve compliance. ACOP L8/HSG 274 outline a suitable and sufficient written scheme as having:
a) an up-to-date plan showing the layout of the plant or water system, including parts temporarily out of use (a schematic diagram is sufficient);
b) a description of the correct and safe operation of the system;
c) the precautions to take;
d) checks to carry out to ensure the written scheme is effective and the frequency of such checks;
e) the remedial action to take if the written scheme is shown to be not effective.
The written scheme should give details on how to use and carry out the various control measures and water treatment regimes, including:
a) the physical treatment programme – e.g. using temperature control for hot and cold water systems;
b) the chemical treatment programme, including a description of the manufacturer’s data on effectiveness, the concentrations and contact time required;
c) health and safety information for storage, handling, use and disposal of chemicals;
d) system control parameters (together with allowable tolerances); physical, chemical and biological parameters, together with measurement methods and sampling locations, test frequencies and procedures for maintaining consistency;
e) remedial measures to take in case the control limits are exceeded, including lines of communication;
f) cleaning and disinfection procedures;
g) emergency procedures.
The written scheme should also describe the correct operation of the water system plant, including:
a) commissioning and recommissioning procedures;
b) shutdown procedures;
c) checks of warning systems and diagnostic systems in case of system malfunctions;
d) maintenance requirements and frequencies;
e) operating cycles – including when the system plant is in use or idle.
Our team of dedicated and professionally trained staff ensure the ability to deliver a comprehensive and effective water management service. The S2 Partnership is a member of the Legionella Control Association, delivering key services including risk assessments, consultancy, training and analytical services.
For clients subscribing to RiskWise, reports (including any logsheets and actions) are uploaded directly to RiskWise, prompting an email notification to the site representative of the new report being available.
For clients without RiskWise, reports are issued directly by email to the client representative with the option of hard copies being posted on request.
Please contact us for more information.