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New Plymouth District Council
Inglewood WWTP
Monitoring Programme
Annual Report
2017-2018
Technical Report 2018-31
Taranaki Regional Council
ISSN: 1178-1467 (Online) Private Bag 713
Document: 2089371 (Word) STRATFORD
Document: 2091105 (Pdf) November 2018
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Executive summary
The New Plymouth District Council (NPDC) operates a municipal wastewater treatment plant (WWTP)
the monitoring period, the Company demonstrated an overall high level of environmental
performance.
The Council’s monitoring programme for the year under review included three routine inspections of the
wastewater system, one inspection of the rock wall, and routine bacteriological water sampling of the Wai-iti
Stream and Wai-iti Beach on one occasion.
The monitoring showed that the Retreat was well maintained during the period under review, with several
improvements made to the
wastewater from pipelines between the plants and the Waitara marine
outfall. Both incidents resulted due to the aging pipeline infrastructure which Methanex have
been upgrading and servicing in recent years. The appropriate response and mitigation
measures were applied by Methanex.
During the year, Methanex demonstrated an overall good level of environmental performance
and a high level of administrative performance with the resource consents at both the Motunui
and Waitara Valley facilities.
by these industries that relate to discharges of stormwater, wastewater and
leachate to the Lower Waiwhakaiho River and Mangaone Stream, and to land in the Mangaone Stream
catchment.
One of the intents of the Resource Management Act 1991 (RMA) is that environmental management should
be integrated across all media, so that a consent holder’s use of water, air, and land should be considered
from a single comprehensive environmental perspective. Accordingly, the Council generally implements …
fluids and
wastewater into the McKee Formation by deep well
injection at the McKee-C wellsite
16 Sep
2021
June
annually
01 Jun
2039
9970-1.2
To discharge waste fluids, associated with
hydrocarbon exploration and production by deep
well injection, into the Matemateaonga Formation via
the KW2 and KW16 wells, or into the Mangahewa
Formation via the KA1 and/or KA7 wells or Moki and
Matemateaonga Formations via the KA20A well as a
contingency
07 Oct
2014
June
ANZCO must satisfy. ANZCO holds two consents that allow the discharge
of wastewater and stormwater into the Waitara River, and one consent to discharge
emissions into the air from the site.
The Council’s monitoring programme for the year under review included two compliance
monitoring inspections and two water samples collected for physicochemical analysis.
The monitoring showed that the site was well operated during the period under review.
During the year under review ANZCO
locations 29 April
2008 June 2015 1 June
2021
Water discharge permits
Methanex Motunui 0822-2 To discharge uncontaminated stormwater to
Waihi and Manu Streams
29 Nov
2012 June 2015 1 June
2027
Methanex Motunui 0825-3 To discharge uncontaminated stormwater to an
unnamed tributary of the Waitara River
31 March
2008 June 2015 1 June
2021
Methanex Motunui 0827-3 To discharge wastewater to an unnamed
tributary of the Waitara River
31 March
2008 June 2015 1
Mokoia Tangahoe
22-03027-3.0 R2/3027-3.0 Makowhai Dairies Limited 01-Apr-22 Replacement for expiring consent To discharge farm dairy effluent onto land Discharge Permit 45 Makowhai Road, Hawera Tangahoe
22-11015-1.0 R2/11015-1.0 Wharekauri Trust 04-Apr-22 New consent To discharge treated domestic effluent from a wastewater
treatment system onto and into land
Discharge Permit 41 Wharekauri Road, Urenui Mimi
22-03042-3.0 R2/3042-3.0 RP & CJ Ballantine Family Trust 05-Apr-22 Replacement for
Dairy Effluent disposal
R2/4020-4.1 Dow AgroSciences (NZ) Limited Air - Industry Manufacturing and Processing Pesticide Manufacture
R2/4365-3.0 Buchan Gardens Trust Water - Animal Waste Agriculture Farming - Dairy Effluent disposal
R2/4701-2.2 Ratarock Station Trust Land/Water - Animal Waste Agriculture Farming - Dairy Effluent disposal
R2/6529-2.0 David George Cooper Land - Misc Property Development Waste Management Wastewater - Sewage
R2/6630-2.0 Paul Roydon Gyde Land - Misc …
additional information on alternative
disposal options for the Stratford Wastewater Treatment
Plant.
This is a high level study and not meant to be a detailed
investigation report.
OPTIONS CONSIDERED
To minimise the nutrient load on the Patea River, a range
of land disposal schemes were considered, along with
disposal via a constructed wetland, as requested by TRC.
A previous report, Issues and Options (2015) has addressed
effluent quality upgrades.
COMPARISON OF OPTIONS
As