Water and Wastewater Committee

WATER AND WASTE WATER CONSULTATIVE COMMITTEE

AGENDA FOR MEETING

TUESDAY 4 JULY 2000 10.00 AM

1. APPOINTMENT OF CHAIRMAN

2. APOLOGIES

3. LATE ITEMS

4. CONFIRMATION OF MINUTES

4.1 None to Confirm

5. MATTERS ARISING FROM THE MINUTES

6. GENERAL BUSINESS

6.1 Establish objectives of the Committee

6.2 Prioritizing of resource consent related capital works.

6.2.1 Water and Sewerage Consent status as at June 2000

6.2.2 Hauraki District Council Water Supplies Strategic Plan

6.2.3 Significant resource consents and significant expenditures

6.2.4 Worst first priority ranking

6.3 Paeroa Sewage Treatment Plant

6.4 Waihi Sewage Treatment Plant

6.5 Ngatea Sewage Treatment Plant

6.6 Waihi Water: Walmsley Consents

6.7 Confirmation of future meeting time and dates

7. LATE ITEMS

HAURAKI DISTRICT COUNCIL

WATER AND SEWER CONSULTATIVE COMMITTEE

NOTICE IS HEREBY GIVEN THAT A MEETING WILL BE HELD IN THE COUNCIL CHAMBERS, WILLIAM STREET, PAEROA ON TUESDAY 4 JULY 2000 COMMENCING AT 10.00 AM

AGENDA

Pages

1. APPOINTMENT OF CHAIRMAN

2. APOLOGIES

3. DECLARATION OF LATE ITEMS

Pursuant to Section 46A(7) of the Local Government Official Information and Meetings Act 1987, the Chairman is to call for late items to be accepted.

In the event of a late item, an explanation must be given as to why the item was not on the agenda and why discussion cannot be delayed for a subsequent meeting.

4. CONFIRMATION OF MINUTES

None to confirm

5. MATTERS ARISING FROM MINUTES

6. GENERAL BUSINESS

6.1. Establish Objectives of the Committee

It is considered there would be benefit in the committee members discussing the expected objectives and outcomes of the Committee.

6.2. Prioritising of Resource Consent Related to Capital Works

Recommendations based upon outcomes of strategy workshop on 29 June 2000.

6.2.1 Water and Sewerage Consent Status as at June 2000 (42.000.017, 43.000.017)

Report attached for information. 1-10

RECOMMENDATION

THAT the report be received.

6.2.2 Hauraki District Council Water Supplies Strategic Plan (42.000.017) 11-25

Report attached for information.

RECOMMENDATION

THAT the report be received.

6.2.3 Significant Resource Consents and Significant Expenditures (42.000.017)

Report attached for information. 26

RECOMMENDATION

THAT the report be received.

6.2.4 Worst First Priority Ranking (42.000.017, 43.000.017) 27

Report attached for information.

RECOMMENDATION

THAT the report be received.

6.3 Paeroa Sewage Treatment Plant (42.301.017) 28-46

Resource Consent: Copy attached

Update on progress at meeting.

6.4 Waihi Sewage Treatment Plant (42.601.017)

Funding for Jetflote trial.

The granting of a new resource consent for the discharge from Waihi sewage treatment plant has been stalled for several years. Environment Waikato is very keen to see positive steps taken by Council to gain new discharge consent.

Previous attempts to renew the discharge consents have been thwarted by lack of technology to economically achieve the desired environmental outcomes.

Earlier this year a Jetflote process was viewed as a possible economic solution to improving the standard of Waihi’s treated effluent. The following is an extract from the March Works Committee meeting relating to the Jetflote process.

Attached is a report relating to a visit to Wagga Wagga where a "Jetflote" sewage treatment process was inspected. The "Jetflote" process effectively reduces phosphorous, suspended solids and Biological oxygen demand concentrations from pond effluent. Until very recently the technology has not been available to remove phosphorous from oxidation pond effluent.

A short presentation on the Wagga Wagga visit will be made at the Works Committee meeting.

On the 24 March 1:00 PM, a representative from Jetflote will be available to address Councillors on their treatment process. Invitations have been posted out regarding this meeting.

Based on the test results and a detailed inspection of the Jetflote system installed and operated at Wagga Wagga, it is confirmed that this method of tertiary treatment is a possible option for the Waihi Sewage Treatment system. On this basis further evaluation of the viability of the Jetflote system should be undertaken.

It should be noted that while the system works well in the Australian environment and while there are similarities between the Australian and New Zealand environments it would be prudent to carry out a trial of the system prior to committing to it as part of the treatment process. The purpose of the trial would be to confirm the suitability of the plant for operation in New Zealand conditions and to get accurate figures on the discharge quality. These figures would be required to support the resource consent application.

A detailed estimate of the cost of a trial has not been prepared to date but preliminary estimates indicate that the trial will cost in the order of $45,000 to $50,000. The trial should be run for a minimum period of 12 months.

As this trail would be applicable to many other treatment systems in the Waikato Region and in fact New Zealand, it is felt that approaches should be made to obtain assistance for the funding of the trial from Environment Waikato and other Environmental funding sources.

RECOMMENDATIONS

That the Jetflote system be confirmed as a viable option for the Waihi Sewage Treatment System.

That a trial be undertaken subject to obtaining of appropriate funding.

That the trial be programmed to commence in September 2000.

Discussions with Jetflote have concluded September would be the best month to undertake a trial. Jetflote considers that winter is when their process is most likely to be under stress and September offers a good compromise between winter testing and mid season testing. Jetflote confirms also that 1 week of intensive testing would be adequate. This is a change from earlier estimates where it was considered testing needed to be carried out over a longer period. The following cost breakdown is to undertake one week of testing. Should a further week be requested later in the season, the set-up and testing programme would remain the same resulting in a doubling of the cost of the trial.

Equipment	$ 3,800
Jetflote Staff	$11,500
Plant	$ 1,000
Testing	$ 9,500
HDC Staff	$ 500
TOTAL	$26,300

There is a risk associated in only testing over 1 week. This risk is minimised through Jetflote having fully operational plants in Australia, and that Jetflote is willing to offer a process guarantee.

The Jetflote trial is part of the renewing of the resource consent process for Waihi. As yet the structure of the consultation for Waihi has not been determined. Council may wish to form a Waihi Consultative Committee before the trial, or wait for the outcome of the trial before forming a consultative committee, or undertake consultation on an individual basis. Guidance is sort from Council as to the desired format for consultation.

Regardless of the form of consultation process, it is recommended all interest groups be invited to view the trial whilst it is in operation.

RECOMMENDATIONS

That Council fund 1 weeks of trial to prove the Jetflote process at an estimated cost of $26,300

That interest groups be invited to view the trial whilst in operation.

6.5 Ngatea Sewage Treatment Plant (42.002.017)

Update on progress at meeting.

6.6 Waihi Water: Walmsley Consents (43.603.017)

The Walmsley Dam and water take consents expired in 1 August 1998. Application for the replacement consents were lodged in time to allow continuation of the existing consents until the new consents are issued. Since the lodging of the new consent applications, negotiations have been ongoing with Environment Waikato to agree on conditions that is both acceptable environmentally and affordable for the Hauraki District. The current proposal is for short-term consents based on the following concepts;

To abandon the existing dam and construct an in-stream fine mesh intake in the spillway of the existing dam.

The existing dam will not be demolished, just the scour left open.

To construct a lower Walmsley intake, so in times of low flow water will be extracted from the lower intake only. This would be a pumped intake. Construction cost approx $100,000 (2000~01).

That in the medium term (2004~05) construct either off stream storage, bores or develop larger river source.

The proposed raw water availability in dry summers will be less than summer demands without restrictions. The water available from the lower Walmsley leaving 25% of the flow is approximately equal to taking 100% of the flow at the dam. Actual summer demands vary depending upon the type of summer and the frequency of rainfall. For a Q5 summer raw water availability will be 1,940 m³/day from the lower Walmsley and 500 m³/day from the Waitete providing a total of 2,440 m³/day. Approximately 200 m³/day of this water will be used for back washing leaving 2,200 m³/day for the community.

Location	Q5 Flow m³/day	30 % Q5 m³/day	75% Q5 m³/day
Walmsley Dam	1,825	550	1,370
Lower Walmsley	2,590	780	1,940
Waitete Intakes	665	200	500

Period	Peak Demand	Demand with Restrictions
Jan 1998	3,300 m³/day	2,000 m³/day
Jan 1999	3,300 m³/day	N.A.
Jan 2000	2,300 m³/day	N.A.

To avoid building the lower Walmsley Intake, a strong case would have to be put to Environment Waikato. It will be necessary to continue taking up to 100% of stream flow water take the dam site, and because it is planned to resolved the raw water shortage in 2004~05 the money would be better spent towards developing a permanent solution. This option has not got a high probability of success.

RECOMMENDATION

That negotiation be held with Environment Waikato to see if the current water take can be maintained based on the proposed District wide upgrading strategy.

6.7 Confirmation of Future Meeting Times and Dates

RECOMMENDATION

THAT future meetings of the Water and Sewerage Consultative Committee are held on the 1^st Tuesday of each month starting at 10:00 am.

7.0 LATE ITEMS