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Methodologies
Methodologies

Methodologies

EIA methodologies need specific parameters and variables to be measure to estimate value of impact indicators. Thus it incorporates field sampling, measurement and laboratory analysis of biophysical baseline data to estimate value of impact indicators. This includes data gathering and analysis of soil, air, noise, surface/ground water and ecology.  The study also includes proceeding to consultation with adjoining communities and stakeholders held in public forum (public forum participant).

The specific methodologies for the various parameters and variable to be measured to estimate value of impact indicators are presented below:

Environmental Components

Methods of Sample Collection

Air Quality and Noise

In-situ using digital BWTechnologies gases monitor and Cassela CEL –231digital noise meter model.

Vegetation /Forestry

Rapid assessment and direct observations with emphasis on extent of vegetation loss due to site clearing, impacts of blasting/crushing and construction activities on vegetation outside the acquired areas, and compliance level to the mitigation measures regarding vegetation clearance restriction to required areas.

Soils

Soil samples were collected with an auger and taken to the laboratory for analysis using AAS, ASTM, APHA, Kjeldahl and GA chromatography methods, depending on the parameter to be analyzed.

Surface Water

Water samples were taken to the laboratory for determination of pH, DO, TDS, Turbidity and conductivity; BODs, sulphate and Bicarbonate by APHA standard methods and concentrations of heavy metals (Fe, Cu, Zn, Pb, Ni, V, Cd and Cr) were determined using AAS method.

Socio-economic Environment

Key informant interviews, Focus Group Discussion (FGD) direct observation, and collection of secondary data.

Waste Management

Physical examination, intervention and walk-through survey. Waste management practices on site and the disposal path were investigated and documented. 


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