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San Antonio Quarry

METHODOLOGY FOR THE NET IMPACT ASSESSMENT OF

BIODIVERSITY.

June 2018

Quarry information

Location: Colombia, CountryBoyaca, StateSogamoso, Municipality

Average height above sea level: 2.600 – 3.000 meters

Average annual temperature: 12.5 °C

Average annual rainfall: 1059 mm

Area: 381.09 hectares

Coordinates: 5° 49’ 54’’ N 72° 59’ 57’’ O

San Andrés and Providencia Islands

GorgonaIsland

Geographical and time boundaries

< 1998

Quarry operated

with ED

1998

Quarry operated

with EMP

Baseline

Option C

(during quarrying status)

Quarry rehabilitation

20152001

Moment of Analysis

EMP modification

(during quarrying status)

Use of Proxy Information

1. Baseline: Information obtained from EMP 1998 and testimony of relevant experts

2. Moment of Analysis: Information obtained from the 2015 EMP modification

Evaluation habitats importance and condition (Baseline / 1998)

Natural Forest 126.53

Pastures and Crops Mosaic 9.50

Pastures 192.53

Plantation forest 0.00

Degraded lands 5.23

Rehabilitated area 0.00

Active extraction area 47.29

Total habitat area 381.09

Baseline

(1998)

during quarrying status

Area (ha)

A

2

1

1

2

1

2

1

Habitat

Importance

I

Maturity and

structure of

habitad

Likely diversity of

species typical for the

region and the habitat

Presence of

invasive

species

Degree of

threats to

the habitat

2 2 1 2 1.75

1 1 1 1 1

1 1 1 1 1

1 1 1 1 1

1 1 1 1 1

2 2 1 1 1.5

1 1 1 1 1

Condition

C

Habitat condition

442.8

9.5

192.5

0.0

5.2

0.0

47.3

697.4

Biodiversity

Value

(A*I*C)

1.8Biodiversity index

Evaluation habitats importance and condition (Moment of analysis / 2015)

Natural Forest 112.87

Pastures and Crops Mosaic 9.50

Pastures 5.65

Plantation forest 1 170.43

Degraded lands 5.23

Rehabilitated area 2 26.15

Active extraction area 51.25

Total habitat area 381.09

Moment of analysis

(2015)

during quarrying status

Area (ha)

A

2

1

1

2

1

2

1

Habitat

Importance

I

Maturity and

structure of

habitad

Likely diversity of

species typical for the

region and the habitat

Presence of

invasive

species

Degree of

threats to

the habitat

2 2 2 3 2.25

1 1 1 1 1

1 1 1 1 1

1 1 1 2 1.25

1 1 1 1 1

2 2 2 2 2

1 1 1 1 1

Habitat condition

Condition

C

507.9

9.5

5.6

426.1

5.2

104.6

51.3

1110.2

Biodiversity

Value

(A*I*C)

2.9Biodiversity index1 Habitat Importance 2, because it has become a refuge for different species2 Rehabilitated to natural forest

Net impact calculationBiodiversity index (moment of analysis) –

Biodiversity index (baseline)

2.9 – 1.8 = 1.1

Suggestions

o Expand glossary, for example, define maturity, habitat structure, diversity andtypical abundance as other ecological and biological concepts.

o Define or establish a scale or criterion that allows a better understanding ofthe value obtained in the calculation of Net Impact, especially when it ispositive.