46 This possible third option involved, effectively, including the entire north-eastern sector of the development site together with an additional area in the south-eastern corner as being UCSW whilst excluding approximately one third of the site in the south central and south-western portion of the site. This possibility was discussed at the hearing as Option C.
47 Option C is founded on paragraph 4 of the final determination characterising UCSW as a low woodland dominated by trees of two species - Eucalyptus botryoides and Angophora floribunda and Mr Payne's recent botanic survey (defined by the additional pencil markings on Exhibit 16) recording two occurrences of E botryoides and numerous specimens of A floribunda in the northern portion of the site outside the boundary of the agreed area of UCSW marked on Exhibit 16.
48 He also records a number of specimens of A floribunda (but none of E botryoides) in the area adjacent to the UCSW in the south eastern portion of the site.
49 Whether the presence of these additional specimens indicated the presence of UCSW or not was a matter of further disagreement between the experts. Dr Clements was of the opinion they were not and Mr Payne supported her in this view.
50 On the other hand, Ms James and Council's experts were of the view that, if I did not accept their primary opinion that the ecological community was present across the whole of the development site (for the reasons which they had advanced in their statements of evidence), the presence of these indicator tree species was relevant and would justify the conclusion that at least these additional areas were inhabited by UCSW.
51 The question how I should regard the presence of these plants (about which, as I have earlier noted, I have no detailed information as to size or health) in the context of paragraph 4 of the final determination itself becomes an important subset of the crucial disputed question whether UCSW is distributed generally throughout the development site.
52 Dr Clements was of the view that the word dominated in paragraph 4 of the final determination meant that there needed to be a presence of canopy trees and that the two indicator species needed to predominate amongst those trees. Neither of these criteria applies to these additional specimens.
53 She was also of the opinion that there was no certainty that, in twenty years time, all or any of these trees would have grown to maturity as canopy trees and thus provide any possibility of satisfaction of the provisions of paragraph 4 of the final determination (according to her interpretation of its meaning and intent).
54 On the other hand, although she expressed doubts as to whether this would occur, she did not say that there was any certainty that this would or could not occur.
55 As a consequence, it would seem to me that whether or not I am in a position to assume that these indicator specimens demonstrate a present occurrence of a developed ecological community, I cannot be certain that there is not a nascent UCSW community present on the development site beyond the extent of its agreed existence as depicted on Exhibit 16.
(viii) Conclusions as to the presence of UCSW on the development site
56 In light of the foregoing considerations, a number of conclusions are able to be made concerning the presence of UCSW on the development site. These are as follows:
· The area shown by the orange boundary in Exhibit 16 (except for the area in the north-western corner now not accepted by Dr Clements) definitely reflects the presence of UCSW;
· With respect to the now contested area in the north-western corner, the fact that an examination of Exhibit T (the tree survey) does not disclose any material difference between the trees present at the time of the agreement being reached (as shown in Exhibit 16) and those trees shown as being present in Exhibit T, leads me to conclude that I should prefer the Exhibit 16 agreed position. I therefore determine that UCSW is also present on the north-western corner as originally agreed. (The consequence of this conclusion is that one element of the originally agreed community would be impacted by the current proposal);
· With respect to the areas in the northern portion of the site and in the south-eastern portion of the site adjacent to the Exhibit 16 agreed areas, where new knowledge of the presence of the two species Eucalyptus botryoides and Angophora floribunda (the latter in some frequency) arises from Mr Payne's more recent botanic survey, I am comfortably satisfied, on the balance of probabilities, that UCSW is present in those areas defined by the additional pencil markings on Exhibit 16. The degree of my satisfaction is somewhat stronger with respect to the northern of these two portions because of the absence of E botryoides in the southern of these portions; and
· With respect to the remainder of the site (the central and south-western portions of it) I am unable to resolve, on any scientific basis founded on the evidence, the disagreement between the experts. Therefore, I am unable to determine whether or not UCSW is present on that portion of the site. This conclusion necessarily follows from the strongly expressed and irreconcilable disagreement between the experts and the absence of either the determinative tree species noted in paragraph 4 of the final determination. However, as will later appear, this inconclusive result will need to be reviewed to reflect the application of the precautionary principle.
57 In assessing the extent of UCSW on the site (beyond the agreed position), I have considered the criticism of Ms James' analysis made by Ms Donald, a statistician who gave evidence on behalf of the Applicant.
58 This criticism does not impact the conclusion which I have reached concerning the additional area of the site which should be regarded as UCSW which is primarily based on the additional tree information and the inferences to be drawn from it.
59 Moreover, I am not satisfied that Ms Donald's evidence significantly undermines Ms James' evidence about the remainder of the site in respect of which I am unable to reach a definite conclusion as to the occurrence or not of UCSW. Ms James' conclusion about the remainder of the site is supported by the Council's experts and their views were not shaken during the hearing (which involved the reception of concurrent oral evidence by all the ecological experts, their questioning of each other and their cross-examination).
60 In reaching the foregoing conclusions, I have taken into consideration the differences between the expert witnesses relating to the soil types identified on the development site. That issue arises because the final determination states, in one sentence in paragraph 5, that the occurrence of UCSW is related to the type of soils that are present on sites where it is found. It does so in the context of the state of its knowledge of the soil types expressed in the data available to it. In this respect, the terms of the final determination in referring to a referenced 1952 study, states:
They described the soils as iron podzols and distinguished them from humus podsols with Angophora costata which occurred further away from the beach.
61 It is accepted by the experts that iron podzols are not found on the site - however, humus podsols are.
62 However, Mr Payne provides assistance on this issue, at page 23 of the SIS where he summarises the present position about the distribution of various soil types at a number of the locations where UCSW is acknowledged to exist.
63 This summary confirms that the soil type position is not as absolute as may be suggested in the final determination. As a consequence, I am satisfied that, although the soil types of the site do not reflect the soil types identified by the Scientific Committee, this fact of itself does not preclude my conclusions as the presence of UCSW on the site (in the same way that it obviously did not preclude the experts agreeing upon the extent of UCSW on the site).
F. SCOPE FOR THE APPLICATION OF THE PRECAUTIONARY PRINCIPLE
64 The conclusions that I have expressed in respect of the extent of the existence (and distribution) of the UCSW on the development site (including my open finding as to whether UCSW is distributed throughout the site) give rise to the question of the application in the present case of the precautionary principle.
65 The precautionary principle is one of the stated principles of the "ecologically sustainable development". That concept (which originated in international environmental protocols) was added to the objects stated in s 5 of the EP&A Act in 1998 (when Act No 152 of 1997 commenced). However, at that time, the EP&A Act provided no definition of the concept, although it was already defined in other existing legislation. This specific legislative lack has now been made good by the Environmental Planning and Assessment (Infrastructure and other Planning Reform) Act 2005 (Act No 43) introducing into the definition section of the EP&A Act the following definition:
Ecologically sustainable development has the same meaning it has in section 6(2) of the Protection of the Environment Administration Act 1991
66 Section 6(2) of that Act is in the following terms:
For the purposes of subsection (1) (a), ecologically sustainable development requires the effective integration of economic and environmental considerations in decision-making processes. Ecologically sustainable development can be achieved through the implementation of the following principles and programs:
(a) the precautionary principle - namely, that if there are threats of serious or irreversible environmental damage, lack of full scientific certainty should not be used as a reason for postponing measures to prevent environmental degradation.
In the application of the precautionary principle, public and private decisions should be guided by:
(i) careful evaluation to avoid, wherever practicable, serious or irreversible damage to the environment, and
(ii) an assessment of the risk-weighted consequences of various options,
(b) inter-generational equity - namely, that the present generation should ensure that the health, diversity and productivity of the environment are maintained or enhanced for the benefit of future generations,
(c) conservation of biological diversity and ecological integrity - namely, that conservation of biological diversity and ecological integrity should be a fundamental consideration,
(d) improved valuation, pricing and incentive mechanisms - namely, that environmental factors should be included in the valuation of assets and services, such as:
(i) polluter pays - that is, those who generate pollution and waste should bear the cost of containment, avoidance or abatement,
(ii) the users of goods and services should pay prices based on the full life cycle of costs of providing goods and services, including the use of natural resources and assets and the ultimate disposal of any waste,
(iii) environmental goals, having been established, should be pursued in the most cost effective way, by establishing incentive structures, including market mechanisms, that enable those best placed to maximise benefits or minimise costs to develop their own solutions and responses to environmental problems.
67 It was while the EP&A Act did not provide a statutory definition of the term "ecologically sustainable development" that McClellan CJ in BGP Properties Pty Ltd v Lake Macquarie City Council (2004) 138 LGERA 237 was required to determine whether the precautionary principle should be applied to the decision required in that case of determining an appeal against the Council's refusal of a development application. His Honour, after comprehensively reviewing the relevant case law and relevant legislation, (including the origins of the concept of ecologically sustainable development in international symposia) held that the precautionary principle should be applied to the decision required to be made in that case, when he expressed the following conclusions at pars 113 and 114:
In my opinion, by requiring a consent authority (including the Court) to have regard to the public interest, s 79(C)(e) of the EP&A Act obliges the decision-maker to have regard to the principles of ecologically sustainable development in cases where issues relevant to those principles arise. This will have the consequence that, amongst other matters, consideration must be given to matters of inter-generational equity, conservation of biological diversity and ecological integrity. Furthermore, where there is a lack of scientific certainty, the precautionary principle must be utilised. As Stein J said in Leatch , this will mean that the decision-maker must approach the matter with caution but will also require the decision-maker to avoid, where practicable, serious or irreversible damage to the environment.