500MW Wawa Pumped-Storage Hydropower Project

An Environmental Impact Statement (EIS) was prepared in order to secure an Environmental Compliance Certificate (ECC) for the 500MW pumped-storage hydropower plant project of Olympia Violago Water and Power, Inc. (OVPI). The power plant is located within the Wawa River Basin and Montalban Riven Sub-Basin and covers the municipalities of San Mateo and Rodriguez in Antipolo, Rizal. The EIS prepared by Aperçu Consultants Inc. for this project received the Exemplar Environmental Impact Assessment (EIA) Report in Environmentally Critical Reports award from DENR-BMB. 

As part of the preparation of the EIS, Aperçu Consultants Inc. was engaged in the following activities:

Land Module

Land Use

The major land use conversion of the project site was the conversion from a terrestrial environment to an aquatic environment. The discrepancy between the proposed project with the current land use classification of the site required a reclassification of the existing land use through a Sanggunian Bayan Resolution. A Special Use Agreement in Protected Areas (SAPA) was also secured since the project is located in a protected area.


A thorough assessment of both regional and site geology was done by studying the following: regional tectonic setting, regional stratigraphy, geomorphology, topography, slope, and all relevant geologic hazards (i.e. seismic hazards, ground shaking and acceleration, ground rupture, liquefaction, etc). An assessment of each individual basin affected was also done. The results provided insights on the possible hazards and its impacts on the project. It also served as a basis for the mitigating measures and monitoring plans made. 


Soil type and quality, soil erosion susceptibility, and sediment sources and riverbank stability were assessed in order to make the proper preventive and mitigating measures. 

Terrestrial Ecology

The flora of the project site was assessed for historical occurrences of pest infestation, forest or grassfires, and other similar incidences. It was sampled during the wet and dry seasons through various ecological measures (i.e. species dominance, diversity and evenness, threatened status etc). This helped to identify all possible issues and problems that may arise from the project as well as select the best solution for this specific site. 

A faunal assessment of avian, mammalian, amphibians, and reptiles in the site were assessed during the wet and dry seasons. This was important as the conversion from a terrestrial to aquatic environment would have a large impact on these species. Mitigating measures and monitoring plans were made based on the results of the faunal assessment.

Water Module


Drainage morphology, hydrogeological setting and aquifer identification, rainfall and stream flow measurements, and water resources were assessed to identify all impacts of the project to the hydrology during the construction and operation phases of the project. A hydrology monitoring plan was made for both phases to prevent and mitigate impacts. 

Water Quality 

Water quality baseline conditions were determined through sampling surface waters and ground/spring waters within the project site. All water samples were assessed for pH, temperature, dissolved oxygen (DO), biochemical oxygen demand (BOD), oil and grease, and total suspended solids (TSS). Results served as a basis for monitoring plans. It also helped identify potential impacts of the project construction and operation to the water quality. 

Freshwater Ecology

Aquatic biota characterization of plankton communities, zooplankton, macroinvertebrates, and fish communities was done. Results were used to identify, reduce, and mitigate impacts on the provisioning, regulatory, and cultural services of the various water resources of the project site.

Air Module


Primary and secondary data were used to assess the project’s air pollution impacts and contribution to climate change in terms of greenhouse gas (GHG) emissions. Results were used to identify climate change projections on the rainfall and temperatures.

Ambient Air Quality

Air quality was assessed and compared to the Clean Air Act ambient air quality standards. Air dispersion modeling was done to predict the indicative ambient air quality impacts of the project during the construction phase. 

Ambient Noise

The existing sonic profile at the project site and noise impacts during the construction phase were determined. Results of sound measurements and predicted sound levels were compared to the Environmental Quality Standards for Noise in General Areas. Construction noise control strategies were used to control sound at the source. 

People Module

Existing Conditions in the Host Province, City, and Municipalities

The socio-economic description of the host community and host barangays were assessed. The province of Rizal was assessed through identifying the population, households and housing units, migration, agriculture, aquaculture, other industries, education, telecommunication, power generation, and water supply. The city of Antipolo and municipalities of San Mateo and Rodriguez were assessed through identifying the physical and demographic characteristics, social profile, proximity to basic services and service institutions, barangay programs and services, and project perceptions. 

Indigenous Peoples

Out of the 115 households surveyed, 22 were considered an IP household belonging to the Dumagat and Agta tribes. As such, various Information, Education and Communication (IEC) and consultation activities were held to ensure proper communication with IP communities regarding their Ancestral Domain. Focus group discussions with the IP communities also informed the plans made to protect and conserve cultural heritage and archaeological sites. Benefits from the project were also identified.

Traffic Study

Existing transportation and the traffic situation in the vicinity of the project site was evaluated. Sampling was done for both weekdays and weekends. No traffic congestion as a result of the project was predicted but management and mitigation plans were still made for the construction and operational phases. 

The Environmental Compliance Certificate (ECC) for the project was issued by the Department of Environment and Natural Resources (DENR) on June 2016 with ECC Reference No. ECC-CO-1601-0006. The ECC is available at the following link.

A copy of the Environmental Impact Statement is available at the Environmental Management Bureau (EMB) website at the following link.

EIA for 100 km CALABARZON Natural Gas Transmission Pipeline Project for First Gas Holdings Inc. (2004)

An Environmental Impact Statement was prepared by Apercu for a proposed Calabarzon Natural Gas Transmission Pipeline Project. The pipeline was to originate from the Onshore Gas Treatment Plant (OGP) of Shell Philippines Exploration BV (SPEX) in Tabangao, Batangas City, would traverse Batangas, Cavite and Laguna and end at the Sucat Thermal Power Plant in Muntinlupa City. The highlights of the study were as follows:

  • 100 km long underground pipeline
  • Social engineering of 14 cities and municipalities
  • Water ecological assessment of 12 creeks/rivers and 3 major basins
  • Engineering, geological and geohazard assessment report (EGGAR)
  • Traffic Study
  • Landslide Studies

The project was issued an ECC in April 2004 by the DENR Central Office. For an overview of the EIA system, please visit our Services page.

EIA for the Zambales Nickel and Chromite Mining Project of Rusina (2008)

Apercu was engaged to prepare an Environmental Impact Statement (EIS) for the Zambales Nickel and Chromite Mining Project. The project covers an area of 540 hectares in Sta. Cruz, Zambales. The project involved studies on soil quality, ambient air and water quality, freshwater biology and terrestrial biology. The scope of work also included a traffic survey, social impact assessment, environmental risk assessment and preparation of an environmental management plan.

EIA for Grand Planters International Inc.’s Coal Handling Facility (2010)

An Environmental Impact Assessment (EIA) was conducted for the Grand Planters International Inc. (GPII) Coal Stockyard Project located within the GPII compound in Brgy. Lamao, Limay, Bataan.  The coal terminal, once operational, will serve as a distribution point for coal users, especially for the cement and power industry in Northern and Central Luzon. The main components of the project are:

  • Ship and Barge Unloading and Supporting Structures
  • Belt Conveying System and Dust Containment System
  • Coal Storage

As part of the EIA conduct, Apercu gathered secondary data for the land use, pedology, geology and environmental site assessment of the project area. Additionally, groundwater quality sampling, marine water quality sampling, marine biota survey, birds and terrestrial animal survey, and air quality and noise monitoring were conducted. The ECC was acquired in August 2010.

For a backgrounder on the EIA process, visit our Services page.

EIA For Therma South Inc.’s 300MW Circulating Fluidized Bed Coal-fired Power Plant in Mindanao

Therma South, Inc., a subsidiary of Aboitiz Power Corporation, will construct and operate a 300-MW Circulating Fluidized Bed (CFB) coal-fired power project located in Barangay Binugao, Davao City and in Barangay Inawayan, Sta. Cruz, Davao del Sur. Aperçu conducted site assessments in several locations and assisted TSI in choosing the final project site. Aperçu conducted the Environmental Impact Statement for this thermal power plant project. Baseline studies conducted include geologic surveys, extensive flora and fauna surveys, freshwater and marine ecology surveys. Air dispersion modeling, thermal plume modeling and risk assessment were conducted for the power plant. Data on soil, water, air and noise were also gathered, as well as socio-economic and health data from Davao City and Davao del Sur. Apercu also carried out focus group discussions and perception surveys on the host communities and assisted the client in public scoping and consultations. The ECC for the project was acquired in September 2011.