11 Ms Hayes considered the vegetation on lot 39 to be in moderate condition with rehabilitation potential. In Ms Hayes' opinion the existence of the creek through lot 39 meant that a riparian corridor would need to be preserved for a width of at least 20m on either side of the creek (40m in total given the narrow width of the creek). In consequence, some CPW would be retained on lot 39 in any development. This retained CPW, given its moderate condition and rehabilitation potential, could form linkages with the Second Ponds Creek vegetation area (north of lot 39) through a restored riparian corridor as and when land in the area was developed. For these reasons Ms Hayes thought it likely that the clearing of the CPW from lot 39 outside the riparian corridor would be likely to significantly affect CPW triggering a requirement for a species impact statement to accompany any development application. As part of the process of obtaining concurrence from the Director-General of National Parks and Wildlife for a development application accompanied by a species impact statement Ms Hayes concluded (see s 79B of the Environmental Planning and Assessment Act 1979): - (i) the CPW could be cleared in part from lot 39, (ii) the width of the riparian corridor would be 40m in total (20m each side of the creek), (iii) the width of any buffer of CPW to the riparian corridor would need to be negotiated as part of the species impact process but, probably, another 20m on each side (80m in total) would need to be provided, and (iv) an offset by way of compensatory payment would be required to establish, maintain and improve CPW in the vicinity of lot 39 in the order of $520,000.