2013-05-28-council-agenda - Taupo District Council
2013-05-28-council-agenda - Taupo District Council
2013-05-28-council-agenda - Taupo District Council
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Waitahanui Water Treatment Plant Upgrade<br />
Scheme Waitahanui WTP Upgrade Month Number<br />
Contractor<br />
Month Ending<br />
Budget $206,450 Contract Number<br />
Expenditure $16,907 Commencement Date<br />
Commitments $5,000 Contract Completion Date<br />
Forecast Cost $ <strong>28</strong>0,000 Anticipated Completion Date May 2014<br />
Overall Progress<br />
Detailed Progress<br />
This project is to upgrade the drinking water supply to those on the <strong>Taupo</strong> DC scheme to meet the drinking water standards.<br />
There are 38 properties on the TDC scheme. There are approximately 178 other properties in Waitahanui with private water<br />
supplies.<br />
Funding was approved under the Ministry of Health for Capital Assistance Programme for the equipment to remove protozoa<br />
and arsenic from the source water. Adsorptive media was originally proposed as the method for arsenic removal; before<br />
construction the media was tested to determine its effectiveness and the trial found that while the media was effective at<br />
removing arsenic, it had a very short useful life due to very high levels of silica in the source water.<br />
Opus International Consultants to assist in identifying an alternative process. Arsenlc removal trials were not very successful<br />
and the only option that appears that might be viable is chemical dosing followed by membrane filtration, however a further<br />
test is required to confirm this. The option is considerably more costly than the funding received and also will increase the<br />
operating costs of the plant. Water rates to Waitahanui are expected to increase significantly under this option.<br />
Next steps:<br />
1. Confirm chemical dosing + membranewill be successful (14/06/<strong>2013</strong>),<br />
2. Confirm plant capital and operating cost and determine cost to ratepayer<br />
3. Discussion with SLG<br />
4. Revisit funding application to see if additional government funding is available (or if they are willing to fund<br />
the connection ofWaitahanui to <strong>Taupo</strong>*)<br />
%<br />
"This option will consider connection of all 216 properties to <strong>Taupo</strong> and has not been raised with Ministry of Health or<br />
Waitahanui Residents.<br />
Key Risks<br />
Is.)<br />
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