HORIZONS’ COMPLIANCE REPORTS FOR THE RDC’S LEACHATE DISPOSAL

Compliance Reports (Nov 2013-June 2014)

14. COMPLIANCE AUDIT REPORT

 

 

COMPLIANCE AUDIT REPORT

RANGITIKIE DISTRICT COUNCIL

MARTON

WASTEWATER TREATMENT PLANT

 

Consents

7312 and 7313

 

Reporting Period

26 March 2013 to 29 November 2013.

 

 

 

December 2013

 

Prepared By

Robert Rose

Environmental Protection Officer

 

 

 

CONTACT 24hr Freephone   0508 800 800 help@horizons.govt.nz

http://www.horizons.govt.nz

SERVICE

CENTRESKairanga

Cnr Rongotea &
Kairanga-Bunnythorpe Rds

Palmerston North

Marton

Cnr Hammond & Hair Sts

Taumarunui

34 Maata Street

Woodville

Cnr Vogel (SH2) & Tay StsREGIONAL

HOUSESPalmerston North

11-15 Victoria Avenue

Wanganui

181 Guyton StreetDEPOTSLevin

11 Bruce Road

 

Taihape

Torere Road

Ohotu            POSTAL ADRESSHorizons Regional Council, Private Bag 11025, Manawatu Mail Centre, Palmerston North 4442 | F  06 9522 929

Contents

  1. PERFORMANCE ASSESSMENT. 4
  2. EXECUTIVE SUMMARY. 4
  3. CONSENT DEADLINES. 5
  4. SCOPE OF REPORT. 5
  5. UP GRADES. 5
  6. GENERAL CONDITIONS APPLICABLE TO PERMIT 7312. 6
  7. GENERAL CONDITIONS APPLICABLE TO PERMIT 7313. 11
  8. Recommended: 14

 

TABLES

Table 1: Ammoniacal nitrogen (HRC data)  1. 8

Table 2: Ammoniacal nitrogen (RDC data)  1. 8

Table 3: scBOD concentrations (RDC data)  1. 9

 

1.   PERFORMANCE ASSESSMENT

 

Did I comply with the conditions of my consent?                                         No

2.   EXECUTIVE SUMMARY

 

The operation of the Rangitikei District Council (RDC) Marton Wastewater Treatment Plant (WWTP) is governed by resource consents 7312 and 7313. This report assesses how RDC has complied with this consent during the assessment period of 26 March 2013 to 29 November 2013. The assessment uses data collected by Horizons Regional Council (HRC) and RDC during this assessment period.

As a result of this assessment RDC has been given an overall significant non complying rating for consent 7312 and a complying rating for 7313

The significant non compliance occurred due to RDC failing to meet quality standards specified under condition 1(g). This condition is related to ammoniacal nitrogen. Given this non compliance is an ongoing issues and related to environmental effects a significant non compliance rating has been issued.

The exceedences in ammoniacal nitrogen are considered to be significant as elevated concentrations are directly toxic to the aquatic environment.

3.   CONSENT DEADLINES

RDC are required to forward data into HRC in January, April, July and October each year. Please ensure that RDC continues to provide this information. Please note if a FTP was set up RDC would not have to worry about providing the raw data on these months as HRC would already have the information in an appropriate electronic format.

Although these consents do not require an annual report to be submitted it is recommended that RDC undertake an internal assessment of all of their consents annually. This assessment should provide comments on each of the consent conditions.

4.   SCOPE OF REPORT

This compliance report assesses compliance against resource consents 7312 and 7313. This assessment is based on information obtained through Horizon Regional Councils (HRC) and RDC sampling during the assessment period of 26 March 2013 to 29 November 2013.

5.   UP GRADES

Due to financial restraints RDC consulted with HRC consents team in relation to what upgrades needed to be prioritised. At the time that consultation took place the consenting team advised RDC to prioritise two other sites over the Marton WWTP upgrades. The upgrades at the Marton WWTP have been budgeted for and are due to commence in June 2014. Due to this consultation HRC will not be undertaking any further enforcement action despite the on going issues.

Prior to the upgrades commencing it is recommended that RDC contact HRC to discuss how the upgrades will progress.

Consent 7312 and 7313 expire on 31 March 2019. Therefore, the scheduled upgrades not only need to take the current conditions into consideration but the likely future conditions.

 

6.   GENERAL CONDITIONS APPLICABLE TO PERMIT 7312

Receiving Water Quality

1.      The discharge shall not:

a.     cause the production of any conspicuous oil or grease films, scums or foams, or floatable or suspended materials in the receiving waters; or

During the site visit I did not observe any conspicuous oil or grease films, scums or foams, or floatable or suspended materials in the receiving waters; that could be attributed to the Marton STP discharge.

Compliant

b       cause any emission of objectionable odour; or
During the site visit I did not detect an odour that had derived from the Marton STP that I considered to be objectionable. HRC has not received any odour complaints associated with the Marton STP during this assessment period.

Compliant

C.      render receiving water unsuitable for consumption by farm animals; or

 

 

There is insufficient information available to assess this condition

Compliant

d.      have any significant adverse effects on aquatic life; or

Based on evidence presented in relation to the One Plan hearings, a change of 20% in the QMCI value is considered to be significant.

 

There is insufficient evidence to assess this condition.

 

Not assessed

e.      cause a change in horizontal visibility, defined as the horizontal sighting range of a 200 millimetre diameter black disc, by more that 30%; or, where stream flow is so low as to make horizontal visibility measurement impracticable, or where there is no stream flow upstream of the outfall, cause turbidity to exceed 20 NTU; or

 

There is significant natural variation between the upstream and downstream sites. As a result Black Disk results are not a reliable means of determining Horizontal visibility.

Not assessed

f.       cause a conspicuous change in colour, or

Not assessed – marginal

g.      cause the daily average concentration of ammonia (NH4 N) to exceed 2.0

         grams per cubic metre at water temperatures equal to or less than 15Co, or 2.8.grams per cubic metre at water temperatures greater than 15Co; or

 

The ammoniacal nitrogen concentrations exceed the specified limits on a regular basis (See Table 1 and 2 below). Given that the above limits are based on when aquatic conditions become toxic this is a significant concern.

 

Due to these high concentrations RDC, HRC will be entering into discussions with RDC in the new year. These discussions will include but will limited to what RDC are proposing to address these elevated concentrations.

 

Date Downstream Up Stream Discharge Temperature Limit
 6-Jun-2013 2.192 0.002 37.595 9 2
 4-Jul-2013 1.522 0.008 35.919 10.6 2
 8-Aug-2013 5.878 0.004 45.63 12.2 2
 5-Sep-2013 11.609 0.004 63.321 11.8 2
 3-Oct-2013 3.017 0.001 54.501 15.1 2.8
 7-Nov-2013 1.403 0.01 42.09 16 2.8

 

 

Site Date Down Stream Up Stream Discharge
Marton WWTP 29/01/2013 6.37 <0.01 6.41
Marton Downstream 19/02/2013 0.54 <0.01 0.02
Marton Downstream 27/03/2013 8.63 <0.01 10.7
Marton Downstream 18/04/2013 0.38 <0.01 4.56
Marton Downstream 30/05/2013 3.21 0.02 31.8
Marton Downstream 26/06/2013 1.55 0.01 38.1
Marton Downstream 25/07/2013 3.51 <0.01 37.7
Marton Downstream 28/08/2013 21.7 <0.01 57.3
Marton Downstream 25/09/2013 1.53 <0.01 61.3
Marton Downstream 22/10/2013 1.93 0.02 31.2
Marton Downstream 21/11/2013 30.9 <0.01 44

Significant Non Comply 

h.      cause the daily average carbonaceous BOD5 concentration due to dissolved organic compounds (that is, material passing through a GF/C filter) to exceed 2.0 grams per cubic metre;

Site Date Up Stream Downstream Discharge
Marton WWTP 26/06/2013 <1 <1 <6
Marton WWTP 25/07/2013 <1 <1
Marton WWTP 28/08/2013 <1
Marton WWTP 25/09/2013 <1 <1
Marton WWTP 22/10/2013 <1 <1 2

 

During this assessment period the scBOD5 concentrations have been relatively low. Please instruct your laboratory that the limit is 2 and therefore the accuracy has to be at least 2. Less than values greater than the limit are insufficient to confirm that the concentrations are below the limit.

In the future if a scBOD5 concentration is less than a value greater than 2 a exceedences will be assumed to have occurred and a non compliance issued.

Compliant

Monitoring and Reporting

2.      The Consent Holder shall undertake monthly monitoring of the following parameters in the effluent:

·        flow

·        pH 

·        temperature

·        ammonia nitrogen

·        dissolved oxygen

·        dissolved carbonaceous BOD5

·        suspended solids

·        faecal coliforms

·        dissolved reactive phosphorus

·        nitrate nitrogen

a.     for the purpose of monitoring compliance with Conditions 1(g) and 1(h) of this Consent, instantaneous grab sampling will suffice for monitoring of ammonia nitrogen and dissolved carbonaceous BOD5 except where monitoring results show that the concentrations in the grab sample exceed, or nearly exceed, the concentration values in conditions 1(g) or 1(h), in which case the Consent Holder shall, in consultation with the Regional Council, undertake monitoring over a 24 hour period;

b.       Analysis of the above parameters (except flow) shall be undertaken by a certified laboratory;

c.        The monitoring in this condition shall coincide with the monitoring undertaken pursuant to Condition 3;

d.       Where the laboratory used is not the Regional Council laboratory, results shall be forwarded to the Regional Council in January, April, July and October of each year; the results forwarded shall include monitoring for the three month period immediately preceding the reporting month.

 RDC analyse their samples for the above specified parameters with the exception of temperature. Temperature is measured in the field at the time of sampling. As some of the standards are linked to temperature it is important that temperature at the time of sampling is entered into the spread sheets that are forwarded to HRC.

 

RDC send their samples to Hills Laboratories which is accredited to analyse water samples for the above identified parameters. RDC forward all of the required sampling results to HRC on a quarterly basis.

 

Compliant

3.      The Consent Holder shall undertake monthly monitoring of water quality in Tutaenui Stream immediately upstream, and 500 metres downstream, of the discharge outfall. The parameters to be monitored shall include:

·        black disc visibility

·        colour

·        ammonia nitrogen

·        dissolved carbonaceous BOD5

·        suspended solids

·        particulate organic matter

·        faecal coliforms

·        dissolved reactive phosphorus

·        nitrate nitrogen

·        temperature

·        dissolved oxygen

·        pH 

a.      the monitoring in Condition 3 shall coincide with the monitoring undertaken pursuant to Condition 2;

b.      where the laboratory used is not the Regional Council laboratory, results shall be forwarded to the Regional Council in January, April, July and October of each year; the results forwarded shall include monitoring for the three month period immediately preceding the reporting month.

See condition 2

Compliant

4.      The Consent Holder shall conduct an in stream biota survey, including benthic invertebrates and periphyton, during low flows in Tutaenui Stream, once every 3 years from the date of issue of this consent, for the duration of the consent. The survey shall be carried out at four locations: immediately upstream of the discharge outfall, about 50 metres downstream of the outfall, about 500 metres downstream of the outfall, and at Curls Bridge. The Consent Holder shall forward a report on the survey results to the Regional Council within 3 months of the completion of each survey.

RDC has contacted HRC in relation to getting a quote for doing the sampling associated with this condition. HRC will provide a quote in the new year.

 

A macroinvertebrate survey is due in the 2013-2014 year.

Compliant

5.      The Consent Holder shall notify the Regional Council whenever it is apparent that a breach in consent conditions has occurred or may be about to occur, and whenever any complaints are received regarding the discharge.

RDC keep HRC well informed of what is occurring on site in relation to any issues that may result in non compliances. The monthly samples that RDC take are also forwarded to HRC on a quarterly basis.

Compliant

7.   GENERAL CONDITIONS APPLICABLE TO PERMIT 7313

1.      There shall be no offensive or objectionable odour beyond the property boundary that arises from the release of odorous emissions from the receival, handling or treatment of sewage on the property.

During the site visit I did not detect an odour beyond the property boundary that I considered to be objectionable. HRC have not received any odour complaints in relation to the Marton STP.

Compliant

2.      Dissolved oxygen in the second of the three treatment ponds shall be greater than 1.0 grams per cubic metre at all times. The dissolved oxygen in the second pond shall be continuously monitored and recorded. Records shall be available for inspection at all times, and shall be forwarded to the Regional Council on request.

Please confirm that the Dissolved Oxygen concentration in treatment pond three is greater than 1.0g/m3

Not assessed

3.      Algicides shall not be used for the mitigation of algal blooms without prior consultation with the Regional Council, and approval as to methods of application. 

Based on conversations with Adrian van Niekerken, Algicides are not used at the Marton STP.

Compliant

4.      There shall be no change to the process that substantially changes the quantity or nature of emissions to air from the site without prior consultation with the Manawatu Wanganui Regional Council.

RDC have not made any changes to the Marton STP that would increase or change the nature of the emissions.

Compliant

Reporting

5.      The Consent Holder shall maintain a complaints register, which shall record:

a.      public complaints regarding odour, and the time they were received;

b.      weather conditions at the time of the complaint including (but not necessarily limited to) an estimate of wind speed and direction;

C.      plant operations or malfunctions at the time of complaint; and

d.      remedial measures or other action taken as a result of the odour complaint.

The register shall be made available to the Regional Council on request.

Based on conversations with RDC there have been no odour complaints during this assessment period.

Compliant

6.      The Consent Holder shall notify the Regional Council whenever it is apparent that a breach in consent conditions has occurred, or may be about to occur.

HRC are not aware of any breaches associated with this consent.

Compliant

 

8.   Recommended:

 

As discussed under 1(f) the clarity of the discharge needs to be improved to ensure that the discharge complies with the above standards.

 

Please provide details of when the Marton WWTP is to be upgraded in the 2013-2014 financial year. If RDC know how they are going to address the high ammonia concentrations please specify.

 

 

If you have any queries about this report, please contact me on 0508 800 800 ext. 862, 021 247 7341 or email Robert.Rose@horizons.govt.nz.Regards

 

 

 

 

 

 

Robert Rose

ENVIRONMENTAL COMPLIANCE OFFICER

Inspection details:Officer: Robert Rose

Inspection type: Routine

Consent no: 7312Inspection time: 29/11/2013 10:30

Cost of inspection (excl. GST): $0.00

Consent type: Discharge Permit

 

13. June 2014

COMPLIANCE AUDIT REPORT

RANGITIKIE DISTRICT COUNCIL

MARTON

WASTEWATER TREATMENT PLANT

 

Consents

7312 and 7313

 

 

Reporting Period

24 June 2014

 

 

June 2014


 

Prepared By

Robert Rose

Environmental Protection Officer

 

 

 

 

CONTACT 24hr Freephone   0508 800 800 help@horizons.govt.nz http://www.horizons.govt.nz
SERVICE

CENTRESKairanga

Cnr Rongotea &
Kairanga-Bunnythorpe Rds

Palmerston North

Marton

Cnr Hammond & Hair Sts

Taumarunui

34 Maata Street

Woodville

Cnr Vogel (SH2) & Tay StsREGIONAL

HOUSESPalmerston North

11-15 Victoria Avenue

Wanganui

181 Guyton StreetDEPOTSLevin

11 Bruce Road

Taihape

Torere Road

Ohotu            POSTAL ADRESSHorizons Regional Council, Private Bag 11025, Manawatu Mail Centre, Palmerston North 4442 | F  06 9522 929

 

1.   PERFORMANCE ASSESSMENT

 

Did I comply with the conditions of my consent?                                         Yes

2.   EXECUTIVE SUMMARY

 

The operation of the Rangitikei District Council (RDC) Marton Wastewater Treatment Plant (WWTP) is governed by resource consents 7312 and 7313. This report assesses how RDC was complying with relevant conditions on 24 June 2014.

As a result of this assessment RDC has been given an overall complying rating for consent 7312 and a complying rating for 7313

3.   SCOPE OF REPORT

This compliance report assesses compliance against resource consents 7312 and 7313. This assessment is based on information obtained during the site visit on 24 June 2014.

4.   GENERAL CONDITIONS APPLICABLE TO PERMIT 7312

At the time of the site visit RDC was complying with all of the relevant conditions.

A full assessment will be undertaken in September 2014

If you have any queries about this report, please contact me on 0508 800 800 ext. 862, 021 247 7341 or email Robert.Rose@horizons.govt.nz.Regards

Inspection details:
Officer: Robert Rose

Inspection type: Routine

Consent no: 7312Inspection time: 29/11/2013 10:30

Cost of inspection (excl. GST): $0.00

Consent type: Discharge Permit

 

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