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Swift Mix-Bury- Cover and Land

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					                   Swift Mix-Bury-Cover
                    and Land Treatment
                   Monitoring Programme
                      Biennial Report
                         2004-2006
                   Technical Report 2006–87




ISSN: 0114-8184                       Taranaki Regional Council
Document: 302072                                Private Bag 713
                                                  STRATFORD

                                                    June 2007
                          Executive summary
Swift Energy New Zealand Limited operates a number of mix-bury-cover (MBC) and land
treatment sites in the Taranaki region. This report for the period July 2004-June 2006
describes the monitoring programme implemented by the Taranaki Regional Council to
assess the Company’s environmental performance during the period under review and the
results and environmental effects of the Company’s activities.

Swift Energy New Zealand Limited currently hold a total of 32 resource consents for the
disposal of drilling wastes, which include a total of 755 conditions setting out the
requirements that the Company must satisfy. Also included in this report are 1 consent that
was surrendered and 8 consents that lapsed during the monitoring period under review.
Monitoring of the Geary, Schrider, Spence Road and Brown Road disposal areas are covered
by separate monitoring programmes.

The Council’s monitoring programme for the period under review included 4 rounds of
inspections and 10 soil samples collected for analysis.

During the monitoring period MBC was carried out at Rimu-A in August 2004, Tariki-D in
December 2004 and Tawa-B in December 2005. Monitoring of new and existing sites found
that they were complying with consent conditions.

During the monitoring period, the Company demonstrated a good level of environmental
performance and compliance with the resource consents.

This report includes recommendations for the 2006-2007 year.
                                                    i



                                     Table of contents
                                                                                       Page

1.   Introduction                                                                         1
     1.1       Compliance monitoring programme reports and the Resource
               Management Act 1991                                                        1
               1.1.1  Introduction                                                        1
               1.1.2  Structure of this report                                            1
               1.1.3  The Resource Management Act (1991) and monitoring                   1
               1.1.4  Evaluation of environmental performance                             2
     1.2       Process description                                                        3
     1.3       Resource consents                                                          5
               1.3.1   Discharges of wastes to land                                       5
                       1.3.1.1   Consents held by Swift that have lapsed or been
                                 surrendered                                              5
                       1.3.1.2   Consents held by Swift that have not been exercised      6
                       1.3.1.3   Consents exercised by Fletcher Challenge Energy
                                 Taranaki Ltd                                             9
                       1.3.1.4   Consents held by Swift that have been exercised         11
     1.4       Monitoring programme                                                      20
               1.4.1   Introduction                                                      20
               1.4.2   Programme liaison and management                                  20
               1.4.3   Site inspections                                                  20
               1.4.4   Chemical sampling                                                 21

2.   Results                                                                             22
     2.1       Inspections                                                               22
     2.2       Results of discharge and receiving environment monitoring                 22
     2.3       Register of incidents                                                     23

3.   Discussion                                                                          24
     3.1    Discussion of plant performance                                              24
     3.2       Environmental effects of exercise of consents                             24
     3.3       Evaluation of performance                                                 24
     3.4       Alterations to monitoring programmes for 2006-2007                        34
     3.5       Exercise of optional review of consent                                    34

4.   Recommendations                                                                     35

Bibliography and references                                                              38

Appendix I Resource consents held by Swift Energy New Zealand Limited

Appendix II Analytical Results
                                            ii



                               List of tables
Table 1    Consents held by Swift that have lapsed or been
           surrendered                                                     5
Table 2    Consents held by Swift that have not been exercised             6
Table 3    Consents exercised by FCET                                      9
Table 4    Consents held by Swift that have been exercised                11
Table 5    Soil sampling carried out in 2004-2006 monitoring period       22
Table 6    Summary of performance for Consent 5734-1 (Kauri-A) to
           discharge drilling mud, fluids and cuttings from well
           drilling operations with water based muds, and to discharge
           drilling cuttings from wells drilled with synthetic based
           muds onto and into land                                        24
Table 7    Summary of performance for Consent 5925-1 to cover the
           discharge of solid drilling wastes from hydrocarbon
           exploration and production operations at the Kauri-B
           wellsite into land by mix-bury-cover                           25
Table 8    Summary of performance for Consent 5323-1 to discharge
           solid drilling wastes from hydrocarbon exploration
           operations at the Rimu-A wellsite by mix-bury-cover            26
Table 9    Summary of performance for Consent 5729-1 to discharge
           solid drilling wastes from hydrocarbon exploration
           operations at the Rimu-B wellsite by mix-bury-cover            28
Table 10   Summary of performance for Consent 6205-1 to discharge
           drilling muds, drilling cuttings and wastes onto and into
           land from hydrocarbon exploration activities at the Tariki-D
           wellsite via mix-bury cover                                    29
Table 11   Summary of performance for Consent 6286-1 to discharge
           drilling muds, drilling cuttings and drilling wastes from
           hydrocarbon exploration activities at the Tawa-B [ex Matai-
           A] wellsite onto and into land via mix-bury-cover              30
Table 12   Summary of performance for Consent 5742-1 to discharge
           solid drilling wastes from hydrocarbon exploration
           operations at the Te Popo-C wellsite by mix-bury-cover         32
Table 13   Summary of performance for Consent 5652-1 To discharge
           solid drilling wastes from hydrocarbon exploration
           operations at the Tuihu-B wellsite by mix-bury-cover           33




                              List of figures

Figure 1   Map showing location of Swift consents                         4
                                                  1



1.    Introduction
1.1   Compliance monitoring programme reports and the Resource
      Management Act 1991
1.1.1 Introduction
      This report is the Biennial Report for the period July 2004-June 2006 by the Taranaki
      Regional Council describing the monitoring programme associated with resource
      consents held by Swift Energy New Zealand Limited, in relation to the disposal of
      drilling wastes by mix-bury-cover and land treatment.

      This report covers the results and findings of the monitoring programme
      implemented by the Council in respect of the consents held by Swift that relate to
      discharge of drilling wastes from hydrocarbon exploration operations at various sites
      in the region by mix-bury-cover and land treatment. This is the first Biennial Report
      to be prepared by the Taranaki Regional Council to cover the Company’s drilling
      waste discharges and their effects. Schrider and Brown Road disposal areas are
      covered by separate monitoring programmes.


1.1.2 Structure of this report
      Section 1 of this report is a background section. It sets out general information about
      compliance monitoring under the Resource Management Act and the Council’s
      obligations and general approach to monitoring sites through annual programmes.
      The resource consents held by Swift for mix-bury-cover and land treatment in the
      region, the nature of the monitoring programme in place for the period under review
      and a description of the activities and operations conducted at Swift’s various
      disposal sites.

      Section 2 presents the results of monitoring during the period under review,
      including scientific and technical data.

      Section 3 discusses the results, their interpretation, and their significance for the
      environment.

      Section 4 presents recommendations to be implemented in the 2006-2007 monitoring
      year.

      A glossary of common abbreviations and scientific terms, and a bibliography, are
      presented at the end of the report.


1.1.3 The Resource Management Act (1991) and monitoring
      The Resource Management Act primarily addresses environmental `effects' which
      are defined as positive or adverse, temporary or permanent, past, present or future,
      or cumulative. Effects may arise in relation to:

      (a) the neighbourhood or the wider community around a discharger, and may
          include cultural and socio-economic effects;
      (b) physical effects on the locality, including landscape, amenity and visual effects;
                                                2


     (c) ecosystems, including effects on plants, animals, or habitats, whether aquatic or
         terrestrial;
     (d) natural and physical resources having special significance (eg, recreational,
         cultural, or aesthetic);
     (e) risks to the neighbourhood or environment.

      In drafting and reviewing conditions on discharge permits, and in implementing
      monitoring programmes, the Taranaki Regional Council is recognising the
      comprehensive meaning of `effects’ inasmuch as is appropriate for each discharge
      source. Monitoring programmes are not only based on existing permit conditions,
      but also on the obligations of the Resource Management Act to assess the effects of
      the exercise of consents. In accordance with section 35 of the Resource Management
      Act 1991, the Council undertakes compliance monitoring for consents and rules in
      regional plans; and maintains an overview of performance of resource users against
      regional plans and consents. Compliance monitoring, including impact monitoring,
      also enables the Council to continuously assess its own performance in resource
      management as well as that of resource users particularly consent holders. It further
      enables the Council to continually re-evaluate its approach and that of consent
      holders to resource management, and, ultimately, through the refinement of
      methods, to move closer to achieving sustainable development of the region’s
      resources.


1.1.4 Evaluation of environmental performance
      Besides discussing the various details of the performance and extent of compliance
      by the Company during the period under review, this report also assigns an overall
      rating. The categories used by the Council, and their interpretation, are as follows:

      - a high level of environmental performance and compliance indicates that
        essentially there were no adverse environmental effects to be concerned about,
        and no, or trivial (such as data supplied after a deadline) non-compliance with
        conditions.
      - a good level of environmental performance and compliance indicates that adverse
        environmental effects of activities during the year were negligible or minor at
        most, items of concern were resolved positively, co-operatively, and quickly, the
        Council did not record any verified unauthorised incidents involving significant
        environmental impacts and was not obliged to issue any abatement notices, there
        were perhaps some items noted on inspection notices for attention but these items
        were not urgent nor critical, and follow-up inspections showed they have been
        dealt with.
      - improvement desirable indicates that the Council may have been obliged to
        record a verified unauthorised incident involving significant environmental
        impacts against the company, and/or abatement notices may have been issued;
        there were adverse environmental effects arising from activities and intervention
        by Council staff was required, and there were matters that required urgent
        intervention, took some time to resolve, or remained unresolved at end of the
        period under review.
      - poor performance is used when there were grounds for prosecution or
        infringement notice
                                                 3



1.2   Process description
      Mix-bury-cover and land treatment are the two methods by which companies can
      dispose of drill cuttings (mainly solids) and drilling muds (slurry) onto or into land.
      In the past, at the completion of drilling operations, drilling solids (muds and
      cuttings) were often left in lined sumps with the intention of disposing of them
      finally when the site lease was relinquished. Improvements in good practice now
      mean that drilling solids are generally disposed of by mix-bury-cover or land
      treatment as they are created.

      Land treatment involves spreading the drilling solids on the land surface and mixing
      them into the surface soil.

      Mix-bury-cover involves mixing the drilling solids with clean soil and burying the
      mixed material in an unlined pit.

      Guidelines have been produced in Canada (Alberta Energy and Utilities Board 1996
      G50 guidelines) for both these methods. The guidelines specify, amongst other
      conditions, minimum dilution with clean soil, burial depths, and contaminant
      loadings. G50 has been adapted for soil conditions in Taranaki and incorporated in
      the Taranaki Regional Council Guidelines for the control of drilling waste disposal
      onto and into land.

      The Taranaki Regional Council assesses any proposal for the disposal of drilling
      solids by these methods on a case-by-case basis. Particular attention is paid to the
      potential effects on ground and surface water.
                                             4




Figure 1   Map showing location of Swift consents
                                                           5



1.3   Resource consents
1.3.1 Discharges of wastes to land
      Sections 15(1)(b) and (d) of the Resource Management Act stipulate that no person
      may discharge any contaminant onto land if it may then enter water, or from any
      industrial or trade premises onto land under any circumstances, unless the activity is
      expressly allowed for by a resource consent, a rule in a regional plan, or by national
      regulations.

1.3.1.1 Consents held by Swift that have lapsed or been surrendered

      Table 1          Consents held by Swift that have lapsed or been surrendered
       Wellsite                   Consent       Issued         Purpose   Status
       Tuihu-A                    5520-1        14/11/00       MBC       Surrendered 1/2/06
       Piakau-B                   5315-1        24/04/98       Burial    Site not built – lapsed
       Piakau-C                   5318-1        24/04/98       Burial    Site not built – lapsed
       Kauri-Te-Pakakohi-A        5733-1        11/04/01       MBC       Landfarmed under 5734 – lapsed
       Kauri-C                    5932-1        7/12/01        MBC       Landfarmed under 5935 – lapsed
       Kauri-D                    5954-1        22/03/02       MBC       Site not built – lapsed
       Rimu-C                     5912-1        23/11/01       MBC       Site not built – lapsed 22/1/07
       Rimu-D                     6015-1        24/04/02       MBC       Site not built – lapsed
       Rimu-D                     6017-1        24/04/02       LT        Site not built – lapsed


      Swift held discharge permit 5520 to cover the discharge of solid drilling wastes from
      hydrocarbon exploration operations at the Tuihu-A wellsite by mixed-bury-cover.
      This permit was issued by the Taranaki Regional Council on 14 November 2000
      under Section 87(e) of the Resource Management Act to Fletcher Challenge Energy
      Taranaki Ltd. It was transferred on 26 February 2002 to Swift Energy NZ Ltd. The
      consent was surrendered 1 February 2006.

      Swift holds discharge permit 5315 for the Piakau-B wellsite, to cover the discharge of
      drilling solids from well drilling operations by burial into land in the Waitara
      Catchment. This permit was issued by the Taranaki Regional Council on 24 April
      1998 under Section 87(e) of the Resource Management Act to Fletcher Challenge
      Energy Taranaki Ltd. It was transferred on 7 February 2002 to Swift Energy NZ Ltd.
      The site was never built and the consent not exercised, therefore it has now lapsed.

      Swift holds discharge permit 5318 for the Piakau-C wellsite, to cover the discharge of
      drilling solids from well drilling operations by burial into land in the Waitara
      Catchment. This permit was issued by the Taranaki Regional Council on 24 April
      1998 under Section 87(e) of the Resource Management Act to Fletcher Challenge
      Energy Taranaki Ltd. It was transferred on 7 February 2002 to Swift Energy NZ Ltd.
      The site was never built and the consent not exercised, therefore it has now lapsed.

      Swift holds discharge permit 5733 to cover the discharge of solid drilling wastes from
      hydrocarbon exploration operations at the Kauri Te Pakakohi-A wellsite by mix-
      bury-cover. This permit was issued by the Taranaki Regional Council on 11 April
                                                        6


      2001 under Section 87(e) of the Resource Management Act. Drilling wastes were
      discharged under permit 5734, the consent was not exercised, therefore it has now
      lapsed.

      Swift holds discharge permit 5932 to cover the discharge of waste drilling cuttings,
      muds and fluids from wells drilled with water based muds and waste drilling
      cuttings from wells drilled with synthetic based muds from hydrocarbon exploration
      and production operations at the Kauri-C wellsite into land by mix-bury cover. This
      permit was issued by the Taranaki Regional Council on 7 December 2001 under
      Section 87(e) of the Resource Management Act. It was varied on 7 April 2004 to allow
      for a change in the location of the Kauri-C wellsite and mix-bury-cover discharge
      area, and to allow for the discharge of cuttings from wells drilled with synthetic
      based muds. Drilling wastes were discharged under permit 5935, the consent was not
      exercised, therefore it has now lapsed.

      Swift holds discharge permit 5954 to cover the discharge of solid drilling wastes from
      hydrocarbon exploration and production operations at the Kauri-D wellsite by mix-
      bury-cover into land. This permit was issued by the Taranaki Regional Council on 22
      March 2002 under Section 87(e) of the Resource Management Act. The site was never
      built and the consent not exercised, therefore it has now lapsed.

      Swift holds discharge permit 5912 to cover the discharge of solid drilling wastes from
      hydrocarbon exploration and production operations at the Rimu-C wellsite by mix-
      bury-cover. This permit was issued by the Taranaki Regional Council on 23
      November 2001 under Section 87(e) of the Resource Management Act. It was varied
      on 22 January 2002 to increase the amount of solid drilling waste discharged. The site
      was never built and the consent not exercised, therefore it lapsed on 22 January 2007.

      Swift holds discharge permit 6015 to cover the discharge of solid drilling wastes from
      hydrocarbon exploration and production operations by mix-bury-cover at the Rimu-
      D wellsite. This permit was issued by the Taranaki Regional Council on 24 April 2002
      under Section 87(e) of the Resource Management Act. The site was never built and
      the consent not exercised, therefore it has now lapsed.

      Swift holds discharge permit 6017 to cover the discharge of excess drilling fluids and
      solids from hydrocarbon exploration operations associated with eight wells from the
      Rimu-D wellsite onto and into land. This permit was issued by the Taranaki Regional
      Council on 24 April 2002 under Section 87(e) of the Resource Management Act. The
      site was never built and the consent not exercised, therefore it has now lapsed.

1.3.1.2 Consents held by Swift that have not been exercised

      Table 2       Consents held by Swift that have not been exercised
       Wellsite                Consent       Issued         Purpose   Status
       Goss-A                  6564-1        31/03/05       MBC       Landfarmed under 6135
       Kauri-D                 5956-1        22/03/02       LT        Site not built
       Kowhai-A                6722-1        4/08/05        MBC       Landfarmed under 6867
       Manutahi-A              6302-1        19/04/04       MBC       Landfarmed
       Manutahi-B              6308-1        21/04/04       MBC       Landfarmed
                                             7



Wellsite               Consent    Issued         Purpose      Status
Manutahi-C             6314-1     19/04/04       MBC          Landfarmed
Manutahi-D             6320-1     20/04/04       MBC          Landfarmed
Manutahi-E             6326-1     13/07/04       MBC          Site not built
Manutahi-F             6332-1     16/07/04       MBC          Site not built
Manutahi-G             6338-1     2/06/04        MBC          Landfarmed under 5734
Manutahi-H             6344-1     3/04/06        MBC          Site not built
Tariki-D               6206-1     10/09/03       Spray        Discharged under 6203
                                                 Irrigation
Tawa-A                 6251-1     28/10/04       MBC          Site not built
Trapper-A              6674-1     4/04/05        MBC          Landfarmed under 6135
Waihapa-G              6850-1     6/04/06        MBC          Site not built
Waihapa-H              6857-1     3/04/06        MBC          Landfarmed under 6135


The following permits are attached to this report in Appendix I.

Swift holds discharge permit 6564 to cover the discharge of drilling muds, drilling
cuttings and drilling wastes from hydrocarbon exploration activities at the Goss-A
wellsite onto and into land via mix-bury-cover. This permit was issued by the
Taranaki Regional Council on 31 March 2005 under Section 87(e) of the Resource
Management Act. It is due to expire on 1 June 2022.

Swift holds discharge permit 5956 for the Kauri-D wellsite, to cover the discharge of
drilling muds, fluids and cuttings from drilling operations with water based muds,
and drilling cuttings from drilling operations with synthetic based muds, onto and
into land via land farming. This permit was issued by the Taranaki Regional Council
on 22 March 2002 under Section 87(e) of the Resource Management Act. The consent
was varied in February 2003 to provide for the discharge of drilling cuttings from
wells drilled at the Kauri-D wellsite with synthetic based muds. It was varied again
in November 2005 to provide for the discharge of drilling cuttings and muds from
wells drilled at other wellsites. It was varied once again on 21 March 2007 to extend
the lapse period by a further 5 years. It is due to expire on 1 June 2016.

Swift holds discharge permit 6722 to cover the discharge of drilling muds, drilling
cuttings and drilling wastes from hydrocarbon exploration activities at the Kowhai-A
wellsite onto and into land via mix-bury-cover. This permit was issued by the
Taranaki Regional Council on 26 October 2005 under Section 87(e) of the Resource
Management Act. It is due to expire on 1 June 2021.

Swift holds discharge permit 6302 to cover the discharge of drilling muds, drilling
cuttings and drilling wastes from hydrocarbon exploration activities at the
Manutahi-A wellsite onto and into land via mix-bury-cover. This permit was issued
by the Taranaki Regional Council on 19 April 2004 under Section 87(e) of the
Resource Management Act. It is due to expire on 1 June 2022.

Swift holds discharge permit 6308 to cover the discharge of drilling muds, drilling
cuttings and drilling wastes from hydrocarbon exploration activities at the
Manutahi-B wellsite onto and into land via mix-bury-cover. This permit was issued
                                          8


by the Taranaki Regional Council on 21 April 2004 under Section 87(e) of the
Resource Management Act. It is due to expire on 1 June 2022.
Swift holds discharge permit 6314 to cover the discharge of drilling muds, drilling
cuttings and drilling wastes from hydrocarbon exploration activities at the
Manutahi-C wellsite onto and into land via mix-bury-cover. This permit was issued
by the Taranaki Regional Council on 19 April 2004 under Section 87(e) of the
Resource Management Act. It is due to expire on 1 June 2022.

Swift holds discharge permit 6320 to cover the discharge of drilling muds, drilling
cuttings and drilling wastes from hydrocarbon exploration activities at the
Manutahi-D wellsite onto and into land via mix-bury-cover. This permit was issued
by the Taranaki Regional Council on 20 April 2004 under Section 87(e) of the
Resource Management Act. It is due to expire on 1 June 2022.

Swift holds discharge permit 6326 to cover the discharge of drilling muds, drilling
cuttings and drilling wastes from hydrocarbon exploration activities at the
Manutahi-E wellsite onto and into land via mix-bury-cover. This permit was issued
by the Taranaki Regional Council on 13 July 2004 under Section 87(e) of the Resource
Management Act. It is due to expire on 1 June 2022.

Swift holds discharge permit 6332 to cover the discharge of drilling muds, drilling
cuttings and drilling wastes from hydrocarbon exploration activities at the
Manutahi-F wellsite onto and into land via mix-bury-cover. This permit was issued
by the Taranaki Regional Council on 16 July 2004 under Section 87(e) of the Resource
Management Act. It is due to expire on 1 June 2022.

Swift holds discharge permit 6338 to cover the discharge of drilling muds, drilling
cuttings and drilling wastes from hydrocarbon exploration activities at the
Manutahi-G wellsite onto and into land via mix-bury-cover. This permit was issued
by the Taranaki Regional Council on 1 June 2004 under Section 87(e) of the Resource
Management Act. It is due to expire on 1 June 2022.

Swift holds discharge permit 6344 to cover the discharge of drilling muds, drilling
cuttings and drilling wastes from hydrocarbon exploration activities at the
Manutahi-H wellsite onto and into land via mix-bury-cover. This permit was issued
by the Taranaki Regional Council on 1 June 2004 under Section 87(e) of the Resource
Management Act. It is due to expire on 1 June 2022.

Swift holds discharge permit 6206 to cover the discharge of diluted drilling fluids
from hydrocarbon exploration activities from a drilling waste holding receptacle at
the Tariki-D wellsite onto and into land via spray irrigation. This permit was issued
by the Taranaki Regional Council on 10 September 2003 under Section 87(e) of the
Resource Management Act. It is due to expire on 1 June 2021.

Swift holds discharge permit 6251 to cover the discharge of drilling muds, drilling
cuttings and drilling wastes from hydrocarbon exploration activities at the Tawa-A
wellsite onto and into land via mix-bury-cover. This permit was issued by the
Taranaki Regional Council on 28 October 2004 under Section 87(e) of the Resource
Management Act. It is due to expire on 1 June 2023.
                                                       9


      Swift holds discharge permit 6674 to cover the discharge of drilling muds, drilling
      cuttings and drilling wastes from hydrocarbon exploration activities at the Trapper-
      A wellsite onto and into land via mix-bury-cover. This permit was issued by the
      Taranaki Regional Council on 4 August 2005 under Section 87(e) of the Resource
      Management Act. It is due to expire on 1 June 2022.
      Swift holds discharge permit 6850 to cover the discharge of drilling muds, drilling
      cuttings and drilling wastes from hydrocarbon exploration activities at the Waihapa-
      G wellsite onto and into land via mix-bury-cover. This permit was issued by the
      Taranaki Regional Council on 6 April 2006 under Section 87(e) of the Resource
      Management Act. It is due to expire on 1 June 2022.

      Swift holds discharge permit 6857 to cover the discharge of drilling muds, drilling
      cuttings and drilling wastes from hydrocarbon exploration activities at the Waihapa-
      H wellsite onto and into land via mix-bury-cover. This permit was issued by the
      Taranaki Regional Council on 3 April 2006 under Section 87(e) of the Resource
      Management Act. It is due to expire on 1 June 2022.

1.3.1.3 Consents exercised by Fletcher Challenge Energy Taranaki Ltd

      Table 3         Consents exercised by FCET
       Wellsite         Consent      Issued        Purpose   Status
       Ahuroa-B         5173-2       16/07/03      MBC       Buried sumps on site, no MBC by Swift
       Piakau-A         5045-2       16/07/03      MBC       Buried sumps on site, no MBC by Swift
       Tariki-A         5133-2       16/07/03      MBC       Buried sumps on site, no MBC by Swift
       Tariki-B         5134-2       17/07/03      MBC       Buried sumps on site, no MBC by Swift
       Tariki-C         5274-1       4/02/98       Burial    Buried sumps on site, no MBC by Swift
       (Kupara Nth)
       Toko-B           4199-1       3/03/93       To land   Unknown, no discharge by Swift
       Toko-E           5287-1       24/02/98      Burial    Buried sumps on site, no MBC by Swift
       Waihapa-F        4161-1       4161-1        To land   Unknown, no discharge by Swift


      The following permits are attached to this report in Appendix I.

      Swift holds discharge permit 5173 to cover the discharge solid drilling wastes from
      hydrocarbon exploration operations at the Ahuroa-B wellsite by mix-bury-cover.
      This permit was issued by the Taranaki Regional Council on 16 July 2003 under
      Section 87(e) of the Resource Management Act. It is due to expire on 1 June 2021.
      The consent was originally issued to Fletcher Challenge Energy Taranaki Ltd on 11
      August 1997 and transferred to Swift Energy NZ Ltd on 7 February 2002. The
      consent for burial was exercised by FCET, it expired on 1 June 2003. No MBC has
      been conducted on site by Swift.

      Swift holds discharge permit 5045 to cover the discharge solid drilling wastes from
      hydrocarbon exploration operations at the Piakau-A Wellsite by mix-bury-cover.
      This permit was issued by the Taranaki Regional Council on 16 July 2003 under
      Section 87(e) of the Resource Management Act. It is due to expire on 1 June 2021.
      The consent was originally issued to Fletcher Challenge Energy Taranaki Ltd on 11
      October 1996 and transferred to Swift Energy NZ Ltd on 7 February 2002. The
                                           10


consent for burial was exercised by FCET, it expired on 1 June 2003. No MBC has
been conducted on site by Swift.

Swift holds discharge permit 5133 to cover the discharge of solid drilling wastes from
hydrocarbon exploration operations at the Tariki-A Wellsite by mix-bury-cover.
This permit was issued by the Taranaki Regional Council on 16 July 2003 under
Section 87(e) of the Resource Management Act. It is due to expire on 1 June 2021.
The consent was originally issued to Fletcher Challenge Energy Taranaki Ltd on 5
May 1997 and transferred to Swift Energy NZ Ltd on 7 February 2002. The consent
for burial was exercised by FCET, it expired on 1 June 2003. No MBC has been
conducted on site by Swift.

Swift holds discharge permit 5134 to cover the discharge of solid drilling wastes from
hydrocarbon exploration operations at the Tariki-B Wellsite by mix-bury-cover. This
permit was issued by the Taranaki Regional Council on 17 July 2003 under Section
87(e) of the Resource Management Act. It is due to expire on 1 June 2021.
The consent was originally issued to Fletcher Challenge Energy Taranaki Ltd on 5
May 1997 and transferred to Swift Energy NZ Ltd on 7 February 2002. The consent
for burial was exercised by FCET, it expired on 1 June 2003. No MBC has been
conducted on site by Swift.

Swift holds discharge permit 5274for the Tariki-C (Kupara North) wellsite, to cover
the discharge of drilling solids from well drilling operations by burial into land in the
Waitara Catchment. This permit was issued by the Taranaki Regional Council on 4
February 1998 under Section 87(e) of the Resource Management Act to Fletcher
Challenge Energy Taranaki Ltd. It was transferred on 7 February 2002 to Swift
Energy NZ Ltd. It is due to expire on 1 June 2016. This consent was exercised by
FCET, it has not been exercised by Swift.

Swift holds discharge permit 4199 for the Toko-B wellsite, to cover the discharge of
drill cuttings and centrifuge cleanings onto land in the Patea Catchment. This permit
was issued by the Taranaki Regional Council on 3 March 1993 under Section 87(e) of
the Resource Management Act to Fletcher Challenge Energy Taranaki Ltd. It was
transferred on 7 February 2002 to Swift Energy NZ Ltd. It is due to expire on 1 June
2010. It is not known if this consent was exercised by FCET, it has not been exercised
by Swift.

Swift holds discharge permit 5287 for the Toko-E wellsite, to cover the discharge of
drilling solids from well drilling operations by burial into land in the Patea
Catchment. This permit was issued by the Taranaki Regional Council on 24 February
1998 under Section 87(e) of the Resource Management Act to Fletcher Challenge
Energy Taranaki Ltd. It was transferred on 7 February 2002 to Swift Energy NZ Ltd.
It is due to expire on 1 June 2016. The consent for burial was exercised by FCET, it
has not been exercised by Swift.

Swift holds discharge permit 4161 for the Waihapa-F wellsite, to cover the discharge
of drilling cuttings and fluids, and rig wastewater from oil well exploration
operations onto or into land in the Patea Catchment. This permit was issued by the
Taranaki Regional Council on 5 November 1992 under Section 87(e) of the Resource
Management Act to Fletcher Challenge Energy Taranaki Ltd. It was transferred on 7
                                                     11


      February 2002 to Swift Energy NZ Ltd. It is due to expire on 1 June 2010. It is not
      known if this consent was exercised by FCET, it has not been exercised by Swift.

1.3.1.4 Consents held by Swift that have been exercised

      Table 4      Consents held by Swift that have been exercised
       Wellsite    Consent      Issued         Purpose               Date Exercised
       Kauri-A     5734-1            1/12/00   LT                    A1, A2, A3, A4 2001-02
       Kauri-B     5925-1            5/12/01   MBC                   Jan 2002
       Rimu-A      5323-1           28/05/98   MBC                   A1 2001, A3 Aug 2004
       Rimu-B      5729-1           11/04/01   MBC                   Mar 2002
       Tariki-D    6205-1           10/09/03   MBC                   Dec 2004
       Tawa-B      6286-1           25/03/04   MBC                   Dec 2005
       TePopo-C    5742-1           22/01/01   MBC                   2001
       Tuihu-B     5652-1           13/11/00   MBC                   2003


      Swift holds discharge permit 5734 for the Kauri-A wellsite to cover the discharge of
      drilling mud, fluids and cuttings from well drilling operations with water based
      muds, and to discharge drilling cuttings from wells drilled with synthetic based
      muds onto and into land. This permit was issued by the Taranaki Regional Council
      on 1 December 2000 under Section 87(e) of the Resource Management Act. It was
      varied in February 2003 to remove the discharge rate and to provide for the
      discharge of drilling cuttings from wells drilled with synthetic based muds. It is due
      to expire on 1 June 2022.

      Condition 1 requires the consent to be exercised in accordance with the application.

      Condition 2 requires the adoption of the best practicable option.

      Condition 3 requires notification of the Council prior to discharge.

      Condition 4 requires separation of areas used for disposal of WBM and SBM.
      Disposal areas for individual areas are also to be kept separate.

      Condition 5 deals with keeping records and providing these to Council.

      Condition 6 allows only waste from within the Taranaki region to be disposed.

      Condition 7 sets a buffer zone between disposal area and surface water and property
      boundaries.

      Condition 8 prohibits the destabilisation of neighbouring land.

      Condition 9 limits the application depth of waste solids.

      Condition 10 deals with hydrocarbon content in the waste or soil waste mix.
                                           12


Conditions 11 and 12 place limits on the electroconductivity and sodium absorption
ratio of the soil/waste layer after application.

Conditions 13 and 14 limit the maximum rate of chloride and nitrogen application.

Condition 15 places limits on the levels of hydrocarbons in the soil prior to expiry,
cancellation, or surrender of the consent.

Condition 16 places limits on the levels of metals in the soil.

Condition 17 limits the level of total dissolved salts within surface or groundwater.

Condition 18 places limits on certain contaminants in the soil prior to expiry,
cancellation or surrender of the consent.

Condition 19 requires tilling and resowing of discharge area as soon as practicable.

Condition 20 prohibits contaminants entering a surface water body.

Condition 21 prohibits any adverse effects on surface or groundwater.

Condition 22 is a review provision.

The permit is attached to this report in Appendix I.

Swift holds discharge permit 5925 to cover the discharge of solid drilling wastes from
hydrocarbon exploration and production operations at the Kauri-B wellsite into land
by mix-bury-cover. This permit was issued by the Taranaki Regional Council on 5
December 2001 under Section 87(e) of the Resource Management Act. It is due to
expire on 1 June 2016.

Condition 1 limits the volume of the discharge.

Condition 2 requires notification of Council prior to discharge.

Condition 3 requires the consent to be exercised in accordance with application
documentation.

Condition 4 allows discharge of water based drilling solids only.

Condition 5 requires certain records to be kept and forwarded to the Council.

Condition 6 requires establishment of buffer zone between discharge area and
surface water, springs or groundwater supply bore.

Condition 7 requires ponded water to be removed from the sump prior to MBC.

Condition 8 requires the mixing of wastes with uncontaminated soils at a ratio of at
least 1:1.

Condition 9 requires disposal to be at least one metre above watertable.
                                           13




Condition 10 specifies certain loading limits.

Condition 11 places a limit on the post disposal chloride levels in the cover soil layer.

Conditions 12 and 13 specify loading limits for chloride and nitrogen.

Condition 14 places a limit on the hydrocarbon content of the soil waste mix.

Condition 15 specifies limits for heavy metals in the soil.

Condition 16 requires the soil waste mix to be covered by at least 0.5 m of
uncontaminated soil and revegetated.

Condition 17 requires the cover material to be compacted and contoured with
surface stormwater directed away from the area.

Condition 18 requires the adoption of the best practicable option.

Condition 19 prohibits the direct discharge of contaminants to a surface water body.

Condition 20 prohibits adverse effects on surface water or groundwater.

Condition 21 is a lapse provision.

Condition 22 allows the consent holder to apply for a change or cancellation.

Conditions 23 and 24 are review provisions.

The permit is attached to this report in Appendix I.

Swift holds discharge permit 5323 to cover the discharge of solid drilling wastes from
hydrocarbon exploration operations at the Rimu-A wellsite by mix-bury-cover. This
permit was issued by the Taranaki Regional Council on 28 May 1998 under Section
87(e) of the Resource Management Act. It was varied on 11 April 2001 to enable
discharge by mix-bury-cover instead of burial. It is due to expire on 1 June 2016.

Condition 1 requires the consent only to be exercised when it is not practicable to
discharge under consent 5734 or 5325.

Condition 2 requires provision of report on MBC and prohibits additional MBC
discharges within 12 months of previous MBC.

Condition 3 limits the volume of material discharged.

Condition 4 requires notification of Council prior to and upon completion of
discharge.

Condition 5 requires exercise of consent to be in accordance with application
information.
                                           14


Condition 6 details records to be kept and provided to Council prior to discharge.

Condition 7 requires establishment of buffer zone between discharge area and any
surface water or bore.

Conditions 8 and 9 require the removal of ponded water from the sump and the
perforation of the impermeable liner prior to mixing.

Condition 10 specifies the mixing ratio of the drilling wastes with uncontaminated
soils.

Condition 11 requires disposal to be above the watertable.

Condition 12 limits the total loading in the drilling wastes.

Condition 13 limits the post disposal chloride levels in the cover soil layer.

Conditions 14 and 15 limit the total site loading of chloride and nitrogen.

Condition 16 limits the hydrocarbon content of the soil waste mix.

Condition 17 limits the heavy metal concentrations.

Conditions 18 and 19 deal with the covering of the wastes and rehabilitation of the
area.

Condition 20 requires adoption of best practicable option.

Condition 21 prohibits the direct discharge of contaminants to a surface water body.

Condition 22 prohibits adverse effects on groundwater or surface water.

Condition 23 is a lapse provision.

Condition 24 allows the consent holder to apply for change or cancellation.

Conditions 25 and 26 are review provisions.

The permit is attached to this report in Appendix I.

Swift holds discharge permit 5729 to cover the discharge of solid drilling wastes from
hydrocarbon exploration operations at the Rimu-B wellsite by mix-bury-cover. This
permit was issued by the Taranaki Regional Council on 11 April 2001 under Section
87(e) of the Resource Management Act. It is due to expire on 1 June 2022.

Condition 1 allows the exercise of the consent only when it is not practicable to
discharge under consent 5734 or 5325.

Condition 2 requires provision of report on MBC and prohibits additional MBC
discharges within 12 months of previous MBC.
                                           15


Condition 3 limits the volume of material discharged.

Condition 4 requires notification of Council prior to and upon completion of
discharge.

Condition 5 requires exercise of consent to be in accordance with application
information.

Condition 6 details records to be kept and provided to Council prior to discharge.

Condition 7 requires establishment of buffer zone between discharge area and any
surface water or bore.

Conditions 8 and 9 require the removal of ponded water from the sump and the
perforation of the impermeable liner prior to mixing.

Condition 10 specifies the mixing ratio of the drilling wastes with uncontaminated
soils.

Condition 11 requires disposal to be above the watertable.

Condition 12 limits the total loading in the drilling wastes.

Condition 13 limits the post disposal chloride levels in the cover soil layer.

Conditions 14 and 15 limit the total site loading of chloride and nitrogen.

Condition 16 limits the hydrocarbon content of the soil waste mix.

Condition 17 limits the heavy metal concentrations.

Conditions 18 and 19 deal with the covering of the wastes and rehabilitation of the
area.

Condition 20 requires adoption of best practicable option.

Condition 21 prohibits the direct discharge of contaminants to a surface water body.

Condition 22 prohibits adverse effects on groundwater or surface water.

Condition 23 is a lapse provision.

Condition 24 allows the consent holder to apply for change or cancellation.

Conditions 25 and 26 are review provisions.

The permit is attached to this report in Appendix I.

Swift holds discharge permit 6205 to cover the discharge of drilling muds, drilling
cuttings and wastes onto and into land from hydrocarbon exploration activities at the
Tariki-D wellsite via mix-bury cover. This permit was issued by the Taranaki
                                           16


Regional Council on 10 September 2003 under Section 87(e) of the Resource
Management Act. It is due to expire on 1 June 2021.
Condition 1 places a limit on the volume of wastes discharged.

Condition 2 specifies information to be provided to Council prior to disposal.

Condition 3 requires notification of Council prior to disposal.

Condition 4 requires the consent to be exercised in accordance with application
information.

Condition 5 requires records to be kept and provided to Council.

Condition 6 requires the establishment of buffer zone between discharge area and
surface water or water supply bore.

Condition 7 requires ponded water to be removed from the sump prior to mixing.

Condition 8 requires the removal or perforation of the sump liner.

Condition 9 requires the wastes to be incorporated with uncontaminated soils.

Condition 10 requires wastes to be placed above the watertable.

Condition 11 places limits on the loading of certain parameters.

Conditions 12 and 13 place limits on loading of chloride and nitrogen.

Condition 14 places a limit on the hydrocarbon content of the soil waste mix.

Condition 15 places a limit on the level of total dissolved salts in surface or
groundwater.

Condition 16 places limits on heavy metals in soil.

Condition 17 requires the wastes to be covered by uncontaminated soil and
revegetated.

Condition 18 requires the cover layer to be compacted, contoured and maintained.

Condition 19 requires the adoption of the best practicable option.

Condition 20 prohibits the direct discharge of contaminants to surface water.

Condition 21 prohibits any adverse impacts on groundwater or surface water.

Condition 22 places limits on levels of hydrocarbons in the soil surface layer.

Condition 23 places limits on certain parameters in the upper soil.

Conditions 24 and 25 are review provisions.
                                           17


The permit is attached to this report in Appendix I.

Swift holds discharge permit 6286 to cover the discharge of drilling muds, drilling
cuttings and drilling wastes from hydrocarbon exploration activities at the Tawa-B
[ex Matai-A] wellsite onto and into land via mix-bury-cover. This permit was issued
by the Taranaki Regional Council on 25 March 2004 under Section 87(e) of the
Resource Management Act. The consent was varied on 15 November 2004 to change
the wellsite name from Matai-A to Tawa-B. It is due to expire on 1 June 2022.

Condition 1 places a limit on the volume of waste discharged and requires wastes
from individual wells to be kept separate.

Condition 2 details information to be provided to Council prior to discharge.

Condition 3 requires notification of Council prior to discharge.

Condition 4 requires the consent to be exercised in accordance with the application
information.

Condition 5 specifies records to be kept and forwarded to Council.

Condition 6 requires the establishment of buffer zones between the discharge area
and surface water or water supply bore.

Condition 7 requires removal of ponded water from the sump prior to mixing.

Condition 8 requires removal or perforation of the sump liner.

Condition 9 requires wastes to be incorporated with uncontaminated soil.

Condition 10 requires the wastes to be placed above the watertable.

Condition 11 places limits on certain loadings in the waste.

Conditions 12 and 13 place limits on the loading of chloride and nitrogen.

Condition 14 places a limit on the hydrocarbon content of the soil waste mix.

Condition 15 places a limit on the level of total dissolved salts in surface or
groundwater.

Condition 16 places limits on levels of heavy metals in the soil.

Condition 17 requires the wastes to be covered by uncontaminated soil and
revegetated.

Condition 18 requires the cover layer to be compacted, contoured and maintained.

Condition 19 requires the adoption of the best practicable option.

Condition 20 prohibits the direct discharge of contaminants to surface water.
                                           18


Condition 21 prohibits any adverse effects on groundwater or surface water.

Condition 22 places limits on levels of hydrocarbons in the surface soil.

Condition 23 places limits on certain parameters in the upper soil.
Conditions 24 and 26 are review provisions.

Condition 25 is a lapse provision.

The permit is attached to this report in Appendix I.

Swift holds discharge permit 5742 to cover the discharge of solid drilling wastes from
hydrocarbon exploration operations at the Te Popo-C wellsite by mix-bury-cover.
This permit was issued by the Taranaki Regional Council on 22 January 2001 under
Section 87(e) of the Resource Management Act to Fletcher Challenge Energy
Taranaki Limited. The consent was transferred on 14 November 2002 to Swift Energy
New Zealand Limited. It is due to expire on 1 June 2015.

Condition 1 places a limit on the volume of discharge.

Condition 2 requires notification of Council prior to discharge.

Condition 3 requires the consent to be exercised in accordance with the application
information.

Condition 4 specifies records to be kept and forwarded to Council prior to discharge.

Condition 5 requires the establishment of buffer zones between disposal areas and
surface water or bores.

Condition 6 requires the removal of ponded water from the sump prior to mixing.

Condition 7 requires the removal or perforation of the sump liner.

Condition 8 requires the wastes to be incorporated with uncontaminated soils.

Condition 9 requires the wastes to be disposed above the watertable.

Condition 10 places limits on loadings of certain parameters.

Condition 11 places a limit on chloride levels in the cover soil layer after disposal.

Conditions 12 and 13 place limits on loading of chloride and nitrogen.

Condition 14 places a limit on the hydrocarbon content of the soil waste mix.

Condition 15 places limits on the levels of heavy metals in the soil.

Condition 16 requires the wastes to be covered by uncontaminated soil and
revegetated.
                                           19


Condition 17 requires the cover layer to be compacted, contoured and maintained.

Condition 18 requires the adoption of the best practicable option.

Condition 19 prohibits any direct discharge of contaminants to surface water.

Condition 20 prohibits any adverse impacts on groundwater or surface water.

Condition 21 is a lapse provision.

Condition 22 allows the consent holder to apply for a change or cancellation.

Conditions 23 and 24 are review provisions.

The permit is attached to this report in Appendix I.

Swift holds discharge permit 5652 to cover the discharge of solid drilling wastes from
hydrocarbon exploration operations at the Tuihu-B wellsite by mix-bury-cover. This
permit was issued by the Taranaki Regional Council on 13 November 2000 under
Section 87(e) of the Resource Management Act to Fletcher Challenge Energy
Taranaki Ltd. The consent was transferred on 14 November 2002 to Swift Energy NZ
Ltd. The consent was varied on 31 July 2003 to increase the volume of solid drilling
wastes discharged. It is due to expire on 1 June 2015.

Condition 1 places a limit on the volume of discharge.

Condition 2 requires notification of Council prior to discharge.

Condition 3 requires the consent to be exercised in accordance with the application
information.

Condition 4 specifies records to be kept and forwarded to Council prior to discharge.

Condition 5 requires the establishment of buffer zones between disposal areas and
surface water or bores.

Condition 6 requires the removal of ponded water from the sump prior to mixing.

Condition 7 requires the removal or perforation of the sump liner.

Condition 8 requires the wastes to be incorporated with uncontaminated soils.

Condition 9 requires the wastes to be disposed above the watertable.

Condition 10 places limits on loadings of certain parameters.

Condition 11 places a limit on chloride levels in the cover soil layer after disposal.

Conditions 12 and 13 place limits on loading of chloride and nitrogen.

Condition 14 places a limit on the hydrocarbon content of the soil waste mix.
                                                 20




      Condition 15 places limits on the levels of heavy metals in the soil.

      Condition 16 requires the wastes to be covered by uncontaminated soil and
      revegetated.

      Condition 17 requires the cover layer to be compacted, contoured and maintained.

      Condition 18 requires the adoption of the best practicable option.

      Condition 19 prohibits any direct discharge of contaminants to surface water.

      Condition 20 prohibits any adverse impacts on groundwater or surfacewater.

      Condition 21 is a lapse provision.

      Condition 22 allows the consent holder to apply for a change or cancellation.

      Conditions 23 and 24 are review provisions.

      The permit is attached to this report in Appendix I.


1.4   Monitoring programme
1.4.1 Introduction
      Section 35 of the Resource Management Act sets out an obligation for the Taranaki
      Regional Council to gather information, monitor, and conduct research on the
      exercise of resource consents, and the effects arising, within the Taranaki region.

      The Taranaki Regional Council may therefore make and record measurements of
      physical and chemical parameters, take samples for analysis, carry out surveys and
      inspections, conduct investigations, and seek information from consent holders.

      The monitoring programme for the Swift mix bury cover and land treatment sites
      consisted of three primary components.


1.4.2 Programme liaison and management
      There is generally a significant investment of time and resources by the Taranaki
      Regional Council in ongoing liaison with resource consent holders over consent
      conditions and their interpretation and application, in discussion over monitoring
      requirements, preparation for any reviews, renewals, or new consents, advice on the
      Council's environmental management strategies and the content of regional plans,
      and consultation on associated matters.


1.4.3 Site inspections
      Each site was visited twice per year during the monitoring period. Sources of data
      being collected by the consent holder were identified and accessed, so that
      performance in respect of operation, internal monitoring, and supervision could be
                                             21


     reviewed by the Council. The neighbourhood was surveyed for environmental
     effects.


1.4.4 Chemical sampling
     The Taranaki Regional Council undertook sampling of both historical and new
     disposal sites. Soil samples were taken from Ahuroa-B, Kauri-A, Piakau-A, Rimu-A,
     Rimu-B, Tariki-A, and Tariki-D.
                                                           22



2.    Results
2.1   Inspections
      Inspections were carried out on 17 August 2004, 27 April 2005, 29 August 2005 and
      27 June 2006. In all cases the sites were found to be in good order.


2.2   Results of discharge and receiving environment monitoring
      During the monitoring period MBC was carried out at Rimu-A in August 2004,
      Tariki-D in December 2004 and Tawa-B in December 2005. The samples collected at
      Ahuroa-B and Piakau-A were to monitor drilling wastes capped in the sumps
      awaiting disposal to a land treatment site. The sample collected at Tariki-A was to
      monitor historical buried sumps that were uncovered during the excavation of new
      sumps on the site. This sample was a mixture of drilling mud and clay.

      Table 5        Soil sampling carried out in 2004-2006 monitoring period
                                                                                                   Total
                                Chloride    Conductivity        Hydrocarbons   Moisture
        Wellsite     Date                                                                 pH     dissolved
                               (mg/kg DW)     (mS/m)             (mg/kg DW)     Factor
                                                                                                salts (g/kg)
       Kauri-A     27 Apr 05      79.0          113                 <3          1.054     7.6       874
       Kauri-A     27 Apr 05      12.1          46.2                 31         1.052     7.8       735
       Rimu-A      27 Apr 05      76.3          116                  22         1.251     7.9       897
       Rimu-B      27 Apr 05      50.1          58.9                <3          1.336     7.2       456
       Ahuroa-B    27 Jun 06      37.5          40.6               10,000       1.206     6.6       314
       Piakau-A    27 Jun 06      31.0          139                17,000       1.308     7.8      1,075
       Rimu-A      27 Jun 06      21.5          89.4                 51         1.184     8.0       692
       Rimu-B      27 Jun 06      22.0          31.9                 22         1.265     7.0       247
       Tariki-A    27 Jun 06      13.0          99.8                130         1.339     7.6       772
       Tariki-D    27 Jun 06      78.0          85.0                560         1.417     7.3       657


      The samples from Ahuroa-B and Piakau-A have high concentrations of hydrocarbons
      because the mud had been capped in the sumps to allow natural degradation. They
      did not reach suitable levels for MBC and were taken to Schrider Landfarm for
      disposal.

      The results of sampling above, for the monitoring of MBC, show that compliance
      with consent conditions was achieved for all sites sampled in the monitoring year
      under review. Sampling results were also provided by BTW Company for Tariki-D,
      Tawa-B and Tuihu-B, these are attached to this report in Appendix II.
                                                 23



2.3   Register of incidents
      The Taranaki Regional Council operates and maintains a register of all complaints or
      reported and discovered excursions from acceptable limits and practices, including
      non-compliance with consents, which may damage the environment. The register
      (‘unauthorised incident register’) includes events where the company concerned has
      itself notified the Council. The register contains details of any investigation and
      corrective action taken.

      Incidents may be alleged to be associated with a particular site. If there is an issue of
      legal liability, the Council must be able to prove by investigation that the identified
      company is indeed the source of the incident. (or that the allegation cannot be
      proven).

      In the 2004-2006 monitoring period, there were no incidents recorded by the Council
      that were associated with the mix-bury-cover and land treatment sites managed by
      Swift Energy NZ Limited.
                                                              24



3.    Discussion
3.1   Discussion of plant performance
      There were only three new disposals during the monitoring period under review,
      new and existing sites appear to be well managed with no issues being raised.


3.2   Environmental effects of exercise of consents
      Results from the disposal sites sampled show that there is no evidence of any adverse
      environmental effects. No groundwater or surface water monitoring was conducted at
      any of the sites. Prior to expiry or surrender of these consents, some would require
      more extensive analysis to demonstrate compliance with all consent conditions.


3.3   Evaluation of performance
      A tabular summary of the Company’s compliance record for the year under review is
      set out in Tables 7 to 15.

      Table 6            Summary of performance for Consent 5734-1 (Kauri-A) to discharge drilling mud, fluids
                         and cuttings from well drilling operations with water based muds, and to discharge
                         drilling cuttings from wells drilled with synthetic based muds onto and into land

                                                                                                        Compliance
       Condition requirement                    Means of monitoring during period under review
                                                                                                         achieved?

       1. Consent exercised in accordance
                                                Inspections and sampling                                   Yes
          with application information

       2. Adoption of best practicable option   Inspections and sampling                                   Yes

       3. Notification to Council prior to
                                                Not applicable in monitoring period – no new disposal      N/A
          discharge

       4. Separate areas for WBM, SBM and
                                                Not applicable in monitoring period – no new disposal      N/A
          individual wells

       5. Records to be kept and provided to
                                                Not applicable in monitoring period – no new disposal      N/A
          Council

       6. Waste from Taranaki region only       Not applicable in monitoring period – no new disposal      N/A

       7. Establishment of buffer zones         Not applicable in monitoring period – no new disposal      N/A

       8. No destabilisation of neighbouring
                                                Inspection                                                 Yes
          land

       9. Maximum application depth of 50mm     Not applicable in monitoring period – no new disposal      N/A

       10. Hydrocarbon content                  Not applicable in monitoring period – no new disposal      N/A

       11. Electroconductivity limits           Sampling                                                   Yes

       12. Sodium absorption ratio limits       No analysis                                                N/A

       13. Limit of 800 kg Cl/ha/yr             Not applicable in monitoring period – no new disposal      N/A

       14. Limit of 200 kg N/ha/yr              Not applicable in monitoring period – no new disposal      N/A
                                                               25



                                                                                                      Compliance
 Condition requirement                        Means of monitoring during period under review
                                                                                                       achieved?

 15. Hydrocarbon levels prior to consent
                                              Not applicable                                             N/A
     expiry, cancellation or surrender

 16. Limits on metal concentration            No analysis                                                N/A

 17. Limit on total dissolved salts in
                                              No analysis                                                N/A
     surface water or groundwater

 18. Soil parameter levels prior to consent
                                              Not applicable                                             N/A
     expiry, cancellation or surrender

 19. Requirement to revegetate                Inspection                                                 Yes

 20. No contamination of surface water        Inspection                                                 Yes

 21. No adverse impacts on groundwater
                                              Inspection                                                 Yes
     or surface water

                                              Review not scheduled for monitoring period under
 22. Consent review                                                                                      N/A
                                              review. Next optional review 2010.




Table 7            Summary of performance for Consent 5925-1 to cover the discharge of solid drilling
                   wastes from hydrocarbon exploration and production operations at the Kauri-B wellsite
                   into land by mix-bury-cover

                                                                                                      Compliance
 Condition requirement                        Means of monitoring during period under review
                                                                                                       achieved?

 1. Maximum discharge 2000 m3                 Not applicable in monitoring period – no new disposal      N/A

 2. Notification of Council prior to
                                              Not applicable in monitoring period – no new disposal      N/A
    discharge

 3. Consent exercised in accordance
                                              Not applicable in monitoring period – no new disposal      N/A
    with application information

 4. Water based drilling solids only          Not applicable in monitoring period – no new disposal      N/A

 5. Records to be kept and forwarded to
                                              Not applicable in monitoring period – no new disposal      N/A
    Council

 6. Establishment of buffer zones             Not applicable in monitoring period – no new disposal      N/A

 7. Removal of ponded water from sump         Not applicable in monitoring period – no new disposal      N/A

 8. Mixing of wastes with
                                              Not applicable in monitoring period – no new disposal      N/A
    uncontaminated soil 1:1

 9. Disposal at least 1m above
                                              Not applicable in monitoring period – no new disposal      N/A
    watertable

 10. Limits on trace element loadings         Not sampled                                                N/A
                                                            26



                                                                                                     Compliance
 Condition requirement                       Means of monitoring during period under review
                                                                                                      achieved?

 11. Limit of 2,000 mg/kg chloride in
                                             Not sampled                                                N/A
     surface soil layer

 12. Limit of 1,600 kg on chloride loading   Not applicable in monitoring period – no new disposal      N/A

 13. Limit of 400 kg on nitrogen loading     Not applicable in monitoring period – no new disposal      N/A

 14. Limit on hydrocarbon content of soil
                                             Not applicable in monitoring period – no new disposal      N/A
     waste mix (15 mg/kg)

 15. Limit on heavy metals in surface soil   Not sampled                                                N/A

 16. Soil/waste layer to be covered by 0.5
                                             Inspection                                                 Yes
     m soil and revegetated

 17. Cover layer to be compacted,
                                             Inspection                                                 Yes
     contoured and maintained

 18. Adoption of best practicable option     Inspection                                                 Yes

 19. No direct discharge of contaminants
                                             Inspection                                                 Yes
     to surface water

 20. No adverse impacts on groundwater
                                             Inspection                                                 Yes
     or surface water

 21. Lapse provision                         Not applicable - consent exercised                         N/A

 22. Consent holder may apply for change
                                             No application received                                    N/A
     or cancellation

 23. Optional review of consent to ensure
     adequacy of monitoring and              No review sought by Council                                N/A
     mitigation measures

 24. Optional review of consent re           Review not scheduled for monitoring period under
                                                                                                        N/A
     environmental effects                   review. Next optional review 2010




Table 8            Summary of performance for Consent 5323-1 to discharge solid drilling wastes from
                   hydrocarbon exploration operations at the Rimu-A wellsite by mix-bury-cover

                                                                                                     Compliance
 Condition requirement                       Means of monitoring during period under review
                                                                                                      achieved?

 1. Consent only to be exercised when
    its not practical to discharge under     Information received                                       Yes
    consent 5734 or 5325

 2. Information to be forwarded to
                                             Information received                                       Yes
    Council prior to discharge

 3. Limit of 4,500 m3 wastes discharged      Inspection and provision of records                        Yes

 4. Notification to Council prior to
                                             Notification                                               Yes
    discharge
                                                          27



                                                                                               Compliance
Condition requirement                       Means of monitoring during period under review
                                                                                                achieved?

5. Consent exercised in accordance
                                            Inspections and sampling                              Yes
   with application information

6. Certain records to be kept and
                                            Provision of records                                  Yes
   forwarded to Council

7. Establishment of buffer zones            Inspection                                            Yes

8. Removal of ponded water from sump        Inspection                                            Yes

9. Removal or perforation of liner          Inspection                                            Yes

10. Mixing of wastes with
                                            Inspection                                            Yes
    uncontaminated soil 1:1

11. Disposal above watertable               Inspection                                            Yes

12. Limits on trace element loadings        No analysis                                           N/A

13. Limit on chloride level in cover soil
                                            Sampling                                              Yes
    layer post disposal

14. Limit of 2,000 kg on chloride loading   No analysis                                           N/A

15. Limit of 400kg on nitrogen loading      No analysis                                           N/A

16. Limit on hydrocarbon content of soil
                                            No analysis                                           N/A
    waste mix (0.1%)

17. Limits on heavy metals in soil          No analysis                                           N/A

18. Cover at least 0.5 m and revegetated    Inspection                                            Yes

19. Compact and contour cover               Inspection                                            Yes

20. Adoption of best practicable option     Inspection and sampling                               Yes

21. No direct discharge to surface water    Inspection                                            Yes

22. No adverse impacts on groundwater
                                            Inspection                                            Yes
    or surface water

23. Lapse provision                         Not applicable – consent exercised                    N/A

24. Consent holder may apply for change
                                            No application received                               N/A
    or cancellation

25. Optional review of consent to ensure
    adequacy of monitoring and              No review sought by Council                           N/A
    mitigation measures

26. Optional review of consent re           Review not scheduled for monitoring period under
                                                                                                  N/A
    environmental effects                   review. Next optional review June 2010.
                                                             28


Table 9            Summary of performance for Consent 5729-1 to discharge solid drilling wastes from
                   hydrocarbon exploration operations at the Rimu-B wellsite by mix-bury-cover

                                                                                                       Compliance
 Condition requirement                         Means of monitoring during period under review
                                                                                                        achieved?

 1. Consent only to be exercised when
    its not practical to discharge under       Not applicable in monitoring period – no new disposal      N/A
    consent 5734 or 5325

 2. Information to be forwarded to
                                               Not applicable in monitoring period – no new disposal      N/A
    Council prior to discharge

 3. Limit of 3,600 m3 on waste
                                               Not applicable in monitoring period – no new disposal      N/A
    discharged

 4. Notification of Council prior to
                                               Not applicable in monitoring period – no new disposal      N/A
    discharge

 5. Consent exercised in accordance
                                               Inspection and sampling                                    Yes
    with application information

 6. Information to be forwarded to
                                               Not applicable in monitoring period – no new disposal      N/A
    Council prior to discharge

 7. Establishment of buffer zones              Not applicable in monitoring period – no new disposal      N/A

 8. Removal of ponded water from sump          Not applicable in monitoring period – no new disposal      N/A

 9. Removal or perforation of liner            Not applicable in monitoring period – no new disposal      N/A

 10. Mixing of wastes with
                                               Not applicable in monitoring period – no new disposal      N/A
     uncontaminated soil 1:1

 11. Disposal above watertable                 Not applicable in monitoring period – no new disposal      N/A

 12. Limits on trace element loadings          No analysis                                                N/A

 13. Limit on chloride in surface layer post
                                               Sampling                                                   Yes
     disposal

 14. Limit of 2,000 kg on chloride loading     Not applicable in monitoring period – no new disposal      N/A

 15. Limit of 400kg on nitrogen loading        Not applicable in monitoring period – no new disposal      N/A

 16. Limit on hydrocarbon content of soil
                                               Not applicable in monitoring period – no new disposal      N/A
     waste mix (0.1%)

 17. Limits on heavy metals in soil            No analysis                                                N/A

 18. Cover at least 0.5 m and revegetated      Inspection                                                 Yes

 19. Compact and contour cover                 Inspection                                                 Yes

 20. Adoption of best practicable option       Inspection                                                 Yes

 21. No direct discharge to surface water      Inspection                                                 Yes

 22. No adverse impacts on groundwater
                                               Inspection                                                 Yes
     or surface water

 23. Lapse provision                           Not applicable – consent exercised                         N/A
                                                            29



                                                                                                Compliance
 Condition requirement                       Means of monitoring during period under review
                                                                                                 achieved?

 24. Consent holder may apply for change
                                             No application received                               N/A
     or cancellation

 25. Optional review of consent to ensure
     adequacy of monitoring and              No review sought by Council                           N/A
     mitigation measures

 26. Optional review of consent re           Review not scheduled for monitoring period under
                                                                                                   N/A
     environmental effects                   review. Next optional review June 2010.




Table 10           Summary of performance for Consent 6205-1 to discharge drilling muds, drilling cuttings
                   and wastes onto and into land from hydrocarbon exploration activities at the Tariki-D
                   wellsite via mix-bury cover

                                                                                                Compliance
 Condition requirement                       Means of monitoring during period under review
                                                                                                 achieved?

 1. Maximum discharge 1500 m3 per
    well. Wastes from individual wells to    Inspection and notification                           Yes
    be kept separate

 2. Information to be forwarded to
                                             Provision of information                              Yes
    Council prior to discharge

 3. Notification of Council prior to
                                             Notification                                          Yes
    discharge

 4. Consent exercised in accordance
                                             Inspection and sampling                               Yes
    with application information

 5. Records to be kept and forwarded to
                                             Provision of records                                  Yes
    Council

 6. Establishment of buffer zones            Inspection                                            Yes

 7. Removal of ponded water from sump        Inspection                                            Yes

 8. Removal or perforation of liner          Inspection                                            Yes

 9. Mixing of wastes with
                                             Inspection                                            Yes
    uncontaminated soil 1:3

 10. Disposal above watertable               Inspection                                            Yes

 11. Limits on trace element loadings        No analysis                                           N/A

 12. Limit of 1,600 kg on chloride loading   No analysis                                           N/A

 13. Limit of 400 kg on nitrogen loading     No analysis                                           N/A

 14. Limit on hydrocarbon content of soil
                                             No analysis                                           N/A
     waste mix (15 mg/kg)
                                                            30



                                                                                                Compliance
 Condition requirement                       Means of monitoring during period under review
                                                                                                 achieved?

 15. Limit on total dissolved salts in
                                             No analysis                                           N/A
     surface water or groundwater

 16. Limit on heavy metals in surface soil   No analysis                                           N/A

 17. Soil/waste layer to be covered by 0.5
                                             Inspection                                            Yes
     m soil and revegetated

 18. Cover layer to be compacted,
                                             Inspection                                            Yes
     contoured and maintained

 19. Adoption of best practicable option     Inspection                                            Yes

 20. No direct discharge of contaminants
                                             Inspection                                            Yes
     to surface water

 21. No adverse impacts on groundwater
                                             Inspection                                            Yes
     or surface water

 22. Limits on hydrocarbons in soil          Sampling                                              Yes

 23. Limits on certain parameters in the
                                             Sampling                                              Yes
     upper soil

 24. Optional review of consent to ensure
     adequacy of monitoring and              No review sought by Council                           N/A
     mitigation measures

 25. Optional review of consent re           Review not scheduled for monitoring period under
                                                                                                   N/A
     environmental effects                   review. Next optional review 2009.




Table 11           Summary of performance for Consent 6286-1 to discharge drilling muds, drilling cuttings
                   and drilling wastes from hydrocarbon exploration activities at the Tawa-B [ex Matai-A]
                   wellsite onto and into land via mix-bury-cover

                                                                                                Compliance
 Condition requirement                       Means of monitoring during period under review
                                                                                                 achieved?

 1. Individual wells kept separate
                                             Inspection and notification                           Yes
    1,500m3 per well

 2. Information to be forwarded to
                                             Provision of information                              Yes
    Council prior to discharge

 3. Notification of Council prior to
                                             Notification                                          Yes
    discharge

 4. Consent exercised in accordance
                                             Inspection and sampling                               Yes
    with application information

 5. Records to be kept and forwarded to
                                             Provision of records                                  Yes
    Council

 6. Establishment of buffer zones            Inspection                                            Yes
                                                          31



                                                                                               Compliance
Condition requirement                       Means of monitoring during period under review
                                                                                                achieved?

7. Removal of ponded water from sump        Inspection                                            Yes

8. Removal or perforation of liner          Inspection                                            Yes

9. Mixing of wastes with
                                            Inspection                                            Yes
   uncontaminated soil 1:3

10. Disposal above watertable               Inspection                                            Yes

11. Limits on trace element loadings        Sampling                                              Yes


12. Limit of 1,600 kg on chloride loading   Sampling                                              Yes

13. Limit of 400 kg on nitrogen loading     Sampling                                              No

14. Limit on hydrocarbon content of soil
                                            Sampling                                              Yes
    waste mix (15 mg/kg)

15. Limit on total dissolved salts in
                                            Sampling                                              Yes
    surface water or groundwater

16. Limit on heavy metals in surface soil   Sampling                                              Yes

17. Soil/waste layer to be covered by 0.5
                                            Inspection                                            Yes
    m soil and revegetated

18. Cover layer to be compacted,
                                            Inspection                                            Yes
    contoured and maintained

19. Adoption of best practicable option     Inspection and sampling                               Yes

20. No direct discharge of contaminants
                                            Inspection and sampling                               Yes
    to surface water

21. No adverse impacts on groundwater
                                            Inspection                                            Yes
    or surface water

22. Limits on hydrocarbons in soil          Sampling                                              Yes

23. Limits on certain parameters in the
                                            Sampling                                              Yes
    upper soil

24. Optional review of consent to ensure
    adequacy of monitoring and              No review sought by Council                           N/A
    mitigation measures

25. Lapse provision                         Not applicable – consent exercised                    N/A

26. Optional review of consent re           Review not scheduled for monitoring period under
                                                                                                  N/A
    environmental effects                   review. Next optional review June 2010.
                                                           32


Table 12           Summary of performance for Consent 5742-1 to discharge solid drilling wastes from
                   hydrocarbon exploration operations at the Te Popo-C wellsite by mix-bury-cover

                                                                                                     Compliance
 Condition requirement                       Means of monitoring during period under review
                                                                                                      achieved?

 1. Maximum discharge 1000 m3                Not applicable in monitoring period – no new disposal      N/A

 2. Notification of Council prior to
                                             Not applicable in monitoring period – no new disposal      N/A
    discharge

 3. Consent exercised in accordance
                                             Not applicable in monitoring period – no new disposal      N/A
    with application information

 4. Records to be kept and forwarded to
                                             Not applicable in monitoring period – no new disposal      N/A
    Council

 5. Establishment of buffer zones            Not applicable in monitoring period – no new disposal      N/A

 6. Removal of ponded water from sump        Not applicable in monitoring period – no new disposal      N/A

 7. Removal or perforation of liner          Not applicable in monitoring period – no new disposal      N/A

 8. Mixing of wastes with
                                             Not applicable in monitoring period – no new disposal      N/A
    uncontaminated soil 1:1

 9. Disposal above watertable                Not applicable in monitoring period – no new disposal      N/A

 10. Limits on trace element loadings        No analysis                                                N/A

 11. Limit of 2,000 mg/kg chloride in
                                             No analysis                                                N/A
     surface soil layer

 12. Limit of 2,000 kg on chloride loading   No analysis                                                N/A

 13. Limit of 400 kg on nitrogen loading     No analysis                                                N/A

 14. Limit on hydrocarbon content of soil
                                             No analysis                                                N/A
     waste mix (1,000 mg/kg)

 15. Limit on heavy metals in surface soil   No analysis                                                N/A

 16. Soil/waste layer to be covered by 0.5
                                             Inspection                                                 Yes
     m soil and revegetated

 17. Cover layer to be compacted,
                                             Inspection                                                 Yes
     contoured and maintained

 18. Adoption of best practicable option     Inspection                                                 Yes

 19. No direct discharge of contaminants
                                             Inspection                                                 Yes
     to surface water

 20. No adverse impacts on groundwater
                                             Inspection                                                 Yes
     or surface water

 21. Lapse provision                         Not applicable - consent exercised                         N/A

 22. Consent holder may apply for change
                                             No application received                                    N/A
     or cancellation
                                                           33



                                                                                                     Compliance
 Condition requirement                       Means of monitoring during period under review
                                                                                                      achieved?

 23. Optional review of consent to ensure
     adequacy of monitoring and              No review sought by Council                                N/A
     mitigation measures

 24. Optional review of consent re           Review not scheduled for monitoring period under
                                                                                                        N/A
     environmental effects                   review. Next optional review 2009.




Table 13           Summary of performance for Consent 5652-1 To discharge solid drilling wastes from
                   hydrocarbon exploration operations at the Tuihu-B wellsite by mix-bury-cover

                                                                                                     Compliance
 Condition requirement                       Means of monitoring during period under review
                                                                                                      achieved?

 1. Maximum discharge 1500 m3 per
    well. Wastes from individual wells to    Not applicable in monitoring period – no new disposal      N/A
    be kept separate

 2. Notification of Council prior to
                                             Not applicable in monitoring period – no new disposal      N/A
    discharge

 3. Consent exercised in accordance
                                             Not applicable in monitoring period – no new disposal      N/A
    with application information

 4. Records to be kept and forwarded to
                                             Not applicable in monitoring period – no new disposal      N/A
    Council

 5. Establishment of buffer zones            Not applicable in monitoring period – no new disposal      N/A

 6. Removal of ponded water from sump        Not applicable in monitoring period – no new disposal      N/A

 7. Removal or perforation of liner          Not applicable in monitoring period – no new disposal      N/A

 8. Mixing of wastes with
                                             Not applicable in monitoring period – no new disposal      N/A
    uncontaminated soil 1:1

 9. Disposal above watertable                Not applicable in monitoring period – no new disposal      N/A

 10. Limits on trace element loadings        Sampling                                                   Yes

 11. Limit of 2,000 mg/kg chloride in
                                             Sampling                                                   Yes
     surface soil layer

 12. Limit of 2,000 kg on chloride loading   Sampling                                                   Yes

 13. Limit of 400 kg on nitrogen loading     Sampling                                                   Yes

 14. Limit on hydrocarbon content of soil
                                             Sampling                                                   Yes
     waste mix (1,000 mg/kg)

 15. Limit on heavy metals in surface soil   Sampling                                                   Yes

 16. Soil/waste layer to be covered by 0.5
                                             Inspection                                                 Yes
     m soil and revegetated

 17. Cover layer to be compacted,
                                             Inspection                                                 Yes
     contoured and maintained
                                                               34



                                                                                                    Compliance
      Condition requirement                      Means of monitoring during period under review
                                                                                                     achieved?

      18. Adoption of best practicable option    Inspection                                            Yes

      19. No direct discharge of contaminants
                                                 Inspection                                            Yes
          to surface water

      20. No adverse impacts on groundwater
                                                 Inspection                                            Yes
          or surface water

      21. Lapse provision                        Not applicable – consent exercised                    N/A

      22. Consent holder may apply for change
                                                 No application received                               N/A
          or cancellation

      23. Optional review of consent to ensure
          adequacy of monitoring and             No review sought by Council                           N/A
          mitigation measures

      24. Optional review of consent re          Review not scheduled for monitoring period under
                                                                                                       N/A
          environmental effects                  review. Next optional review June 2009.




      During the monitoring period, the Company demonstrated a good level of
      environmental performance and compliance with the resource consents.


3.4   Alterations to monitoring programmes for 2006-2007
      In designing and implementing the monitoring programmes for air/water
      discharges in the region, the Taranaki Regional Council has taken into account the
      extent of information made available by previous authorities, its relevance under the
      Resource Management Act, the obligations of the Act in terms of monitoring
      emissions/discharges and effects, and subsequently reporting to the regional
      community, the scope of assessments required at the time of renewal of permits, and
      the need to maintain a sound understanding of industrial processes within Taranaki
      emitting to the atmosphere/discharging to the environment.

      In the case of Swift Energy NZ Limited the programme for 2005-2006 was unchanged
      from that for 2004-2005. It is now proposed that for 2006-2007, the programme is
      altered to replace surface or receiving water sampling with soil sampling. This
      would more adequately reflect the consent conditions and current practice. A
      recommendation to this effect is attached to this report.


3.5   Exercise of optional review of consent
      There are no consents monitored under this programme which allow for a review in
      June 2007.
                                                35



4.   Recommendations
     1.   THAT monitoring of discharges from Swift Energy New Zealand Limited mix
          bury cover and land treatment sites in the 2006-2007 year be amended from that
          undertaken in 2005-2006, by replacing the sampling of surface or receiving
          waters with soil sampling.

          For new disposal sites a background composite soil sample be taken prior to
          disposal if possible, or outside of the disposal area. A composite soil sample be
          taken after each disposal and six months after each disposal.

          For old disposal sites one annual composite soil sample is taken from each
          disposal area. Sampling shall continue until results show that levels of
          contaminants are within consent conditions.
                                                  36



          Glossary of common terms and abbreviations
The following abbreviations and terms are used within this report:

Al*                 aluminium
As*                 arsenic
Biomonitoring       assessing the health of the environment using aquatic organisms
BOD                 biochemical oxygen demand. A measure of the presence of degradable
                    organic matter, taking into account the biological conversion of ammonia
                    to nitrate
BODF                biochemical oxygen demand of a filtered sample
bund                a wall around a tank to contain its contents in the case of a leak
CBOD                carbonaceous biochemical oxygen demand. A measure of the presence of
                    degradable organic matter, excluding the biological conversion of
                    ammonia to nitrate
cfu                 colony forming units. A measure of the concentration of bacteria usually
                    expressed as per 100 millilitre sample
COD                 chemical oxygen demand. A measure of the oxygen required to oxidise
                    all matter in a sample by chemical reaction.
Condy               Conductivity, an indication of the level of dissolved salts in a sample,
                    usually measured at 20°C and expressed in mS/m
Cu*                 copper
DO                  dissolved oxygen
DRP                 dissolved reactive phosphorus
E.coli              Escherichia coli, an indicator of the possible presence of faecal material and
                    pathological micro-organisms. Usually expressed as colony forming units
                    per 100 millilitre sample
Ent                 Enterococci, an indicator of the possible presence of faecal material and
                    pathological micro-organisms. Usually expressed as colony forming units
                    per 100 millilitre of sample
F                   Fluoride
FC                  Faecal coliforms, an indicator of the possible presence of faecal material
                    and pathological micro-organisms. Usually expressed as colony forming
                    units per 100 millilitre sample
fresh               elevated flow in a stream, such as after heavy rainfall
g/m3                grammes per cubic metre, and equivalent to milligrammes per litre
                    (mg/L). In water, this is also equivalent to parts per million (ppm), but
                    the same does not apply to gaseous mixtures
l/s                 litres per second
MCI                 macroinvertebrate community index; a numerical indication of the state
                    of biological life in a stream that takes into account the sensitivity of the
                    taxa present to organic pollution in stony habitats
mS/m                millisiemens per metre
mixing zone         the zone below a discharge point where the discharge is not fully mixed
                    with the receiving environment. For a stream, conventionally taken as a
                    length equivalent to 7 times the width of the stream at the discharge
                    point.
NH4                 ammonium, normally expressed in terms of the mass of nitrogen (N)
NH3                 unionised ammonia, normally expressed in terms of the mass of nitrogen
                    (N)
                                                   37


NO3                  nitrate, normally expressed in terms of the mass of nitrogen (N)
NTU                  Nephelometric Turbidity Unit, a measure of the turbidity of water
O&G                  oil and grease, defined as anything that will dissolve into a particular
                     organic solvent (e.g. hexane). May include both animal material (fats)
                     and mineral matter (hydrocarbons)
Pb*                  lead
pH                   a numerical system for measuring acidity in solutions, with 7 as neutral.
                     Numbers lower than 7 are increasingly acidic and higher than 7 are
                     increasingly alkaline. The scale is logarithmic i.e. a change of 1 represents
                     a ten-fold change in strength. For example, a pH of 4 is ten times more
                     acidic than a pH of 5.
Physicochemical      measurement of both physical properties(e.g. temperature, clarity,
                     density) and chemical determinants ( e.g. metals and nutrients) to
                     characterise the state of an environment
PM10                 relatively fine airborne particles (less than 10 micrometre diameter
resource consent     refer Section 87 of the RMA. Resource consents include land use consents
                     (refer Sections 9 and 13 of the RMA), coastal permits (Sections 12, 14 and
                     15), water permits (Section 14) and discharge permits (Section 15)
RMA                  Resource Management Act 1991 and subsequent amendments
SS                   suspended solids,
Temp                 temperature, measured in °C (degrees Celsius)
Turb                 turbidity, expressed in NTU
UIR                  Unauthorised Incident Register entry- an event recorded by the Council
                     on the basis that it had potential or actual environmental consequences
                     that may represent a breach of a consent or provision in a Regional Plan
Zn*                  zinc

*an abbreviation for a metal or other analyte may be followed by the letters 'As', to denote the
amount of metal recoverable in acidic conditions. This is taken as indicating the total amount
of metal that might be solubilised under extreme environmental conditions. The abbreviation
may alternatively be followed by the letter 'D', denoting the amount of the metal present in
dissolved form rather than in particulate or solid form.

For further information on analytical methods, contact the Council’s laboratory
                                          38



                 Bibliography and references

Taranaki Regional Council 2005: ‘Guidelines for the control of drilling waste disposal
onto and into land’ Taranaki Regional Council, Stratford

Taranaki Regional Council, 2006, Shell Todd Oil Services and Todd Taranaki Ltd Mix-
Bury-Cover and Land Treatment Monitoring Programme Biennial Report 2004-2006,
Technical Report 2006-86
         Appendix I

   Resource consents held by
Swift Energy New Zealand Limited
  Appendix II
Analytical Results

				
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