agreed and implemented. The treatment plant generates and injects sodium hypochlorite into the supply. This can be an effective bactericide but is affected by water turbidity. It is also ineffective against protozoa. High flows in the Black Birch stream can cause highly turbid water to pass through the infiltration gallery. This occurred on many occasions and particularly during a heavy storm event on 13 April 2014 when the treatment plant was ineffective for several days. The permanent ‘Boil Water Notice’ remains in place in the Awatere because of such uncertainties. Level of Service - Provide a reliable water supply service (Flow & Pressure). Performance Indicator – System Capacity - Flow and Pressure (see below) % of properties that receive a minimum water pressure of 300 kPa at the property boundary (except in the Awatere Valley and Wairau Valley Township). Performance Indicator - % of system where fire flows are equal to greater 25 litres/sec; % of system where fire flows are less than 12.5 L/sec. The provision of an adequate supply in terms of both volume and pressure at the point of delivery is an important characteristic of the supply system. The perception of adequacy can be subjective between different types of consumer – a rural lifestyle block will have different requirements to a suburban apatentor example. The measures adopted by the Council were amended in 2013 to better align with the Firefighting Code of Practice. Minimum firefighting flows and pressures must be maintained at 60% of peak system water demand (see Chapter 3: Future Demand – Peak Demand Days). Separate targets have been set for each of the reticulation schemes. In 2013/14 the target for pressure could not be achieved in Renwick as the groundwater source was over taxed during the summer period. The model also demonstrated parts of the Blenheim system could not meet the upper egtingow taget. The area contributing mainly to this is the commercial industrial area to the south-east of the town centre. Pipeline upgrades have been identified to remedy the problem and included in the capital budget at an outline cost of $3.3M. The work has been provisionally programmed over the next 15 years. The availability of adequate services to new developments is assessed through the subdivision application process. The design of pipework within a proposed sub-division is submitted to the Council through the Resource Consent process. Approval is only granted if the supply to the area is adequate and the proposed pipe work is able to deliver the required flow and pressure. The service customers receive is best evaluated by the use of mathematical modelling to simulate the conditions in which the system is working and calculate the performance at critical points on the distribution network. Accurate dynamic models exist for Blenheim and Picton and have been used in the evaluation of this performance indicator since 2011. The peak day demand in each area can be recognised from the flow records of the treatment plants and the contemporary configuration of the reticulation can be incorporated into the model. Hydraulic computer modelling can calculate the water pressure at several thousand node points on the network whilst the estimated maximum flows are loaded against the demand. The number of nodes that do not meet the minimum pressure requirement during the peak demand period can be thus determined. The performance reported is calculated by the above method. The Water Services Database was instigated in March 2010. The number of customer service requests relating water pressure is shown in Figure 5 Customer Requests 2010-14 (2014 part year only) at around 20-27 per annum. A proportion of complaints are due to temporary operational reasons such as mains bursts or pump failures. Blockages in supply pipes, filters and internal plumbing fittings can also reduce pressure at the tap. Many of these are on private plumbing systems and the responsibility of the property owner. They have not been separately identified and recorded in the database. Level of Service - Provide a reliable water supply service. Operational repairs response time. Page 25