Table 1  Risk Rating Criteria

Proximity to Protected Area	Risk Criteria
Internationally recognized areas and/or important biodiversity areas is greater than 5 km from the site.	Low
Internationally recognized areas and/or important biodiversity areas is greater than 2 km or less than 5 km of the site.	Moderate
Internationally recognized areas and/or important biodiversity areas is immediately adjacent to or within 2 km of the site.	High
Site is located within the internationally recognized areas and/or important biodiversity areas.	Very High

An initial desktop screening was undertaken for a 10 km buffer around each site to screen for species that could potentially trigger the site being in proximity to critical biodiversity. This screening was undertaken using the criteria provided in IFC PS6 paragraph 16 or GN16 (of the 2019 update of the 2012 guidance) to identify species highest risk of impact from each site using IFC PS6 Critical Habitat criteria 1, 2, and 3. The criteria used for this screening include:

• Habitat of significant importance to Critically Endangered and/or Endangered species;
• Habitat of significant importance to endemic and/or restricted-range species;
• Habitat supporting globally significant concentrations of migratory species and/or congregatory species;

Critical Habitat may not be limited to pristine or highly biodiverse areas, but can include both modified and natural habitats where these meet the Critical Habitat criterion.

The screening process against the paragraph 16 criteria is informed by the additional guidance provided in GN69 to 97 of the 2019 update of the 2012 guidance. Table 2 details the quantitative qualifying requirements for Criteria 1 to 3 (i.e. thresholds). The criteria listed above have been used to complete this screening. In the absence of reliable population data, proxies such as the proportion of a species’ distribution in the area has been used to inform Critical Habitat -determination.

The criteria are ‘triggers’ in that if an area of habitat meets any one of the criteria, it will be considered Critical Habitat irrespective of failing to meet any other criterion. This approach ensures that all species of high risk of impact from a site is considered. Critical Habitat criteria therefore have two distinctive characteristics. First, components of biodiversity are essentially assigned to only two levels of conservation significance, those that trigger Critical Habitat and those that do not. Secondly, each criterion is applied separately and not in combination, meaning that the scores are not cumulative. A species may be screened in on more than one criterion (e.g., a CR species that is also endemic or range restricted).

Table 2        Critical Habitat Criteria

Criteria	Thresholds
Criterion 1: Critically Endangered (CR) / Endangered (EN) species:	(a) Areas that support globally-important concentrations of an IUCN Red-listed EN or CR species (0.5 % of the global population  and 5 reproductive units of a CR or EN species); (b) Areas that support globally-important concentrations of an IUCN Red-listed VU species, the loss of which would result in the change of the IUCN Red List status to EN or CR and meet the thresholds in (a). (c) As appropriate, areas containing nationally/regionally-important concentrations of an IUCN Red-listed EN or CR species.
Criterion 2: Habitat of significant importance to endemic and/or restricted-range species;	(a) Areas that regularly hold ≥ 10 % of the global population size and ≥ 10 reproductive units of a species.
Criterion 3: Habitat supporting globally significant concentrations of migratory species and/or congregatory species;	(a) Areas known to sustain, on a cyclical or otherwise regular basis, ≥ 1 % of the global population of a migratory or congregatory species at any point of the species’ lifecycle. (b) Areas that predictably support ≥ 10 % of the global population of a species during periods of environmental stress.

  A summary of the Critical Biodiversity Risk Screening findings is summarised in Table 3.

Table 3        Summary of Critical Biodiversity Risk Screening results

S/N	Site Name	PA	KBA	AZE	Ramsar	WH	Total no. of potentially qualifying species
1	Hanoi	Low	Low	Low	Low	Low	-
2	Me Linh	Low	Low	Low	Low	Low	7
3	Song Lam	Low	Low	Low	Low	Low	7
4	Ha Tĩnh	Low	Low	Low	Low	Low	12
5	Quang Ngai	Low	Low	Low	Low	Low	11
6	Nguyen Chi Thanh	Low	Low	Low	Low	Low	-
7	Can Tho	Low	Low	Low	Low	Low	12
8	Cu Chi	Low	Low	Low	Low	Low	4
9	Lam Dong	Moderate	Low	Low	Low	Low	7
10	Soc Trang	Low	Low	Low	Low	Low	3
11	Nghe Tinh	Low	Low	Low	Low	Low	12

Note:
• PA = Protected Area
• KBA = Key Biodiversity Area
• AZE = Alliance for Zero Extinction sites
• Ramsar = Wetland site designated to be of international importance under the Ramsar Convention
• WH = World Heritage Site