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.

EPRMP for Petron Bataan Refinery’s Petro-Fluidized Catalytic Cracking Unit Project (2006)

In 2006, Petron Corporation implemented the PetroFCC Project to enable production of at least 140,000 MT per year of polymer grade propylene product by converting an existing Thermofor Catalytic Cracking Unit (TCCU) into a high propylene yield producing Fluidized Catalytic Cracking Unit (FCCU). The project is located inside the existing refinery compound in Barangay Alangan, Limay, Bataan. Since the PetroFCC is an expansion within an already existing operation, Apercu prepared an Environmental Performance Report and Management Plan (EPRMP). The EPRMP included the documentation of the actual environmental performance of PBR based on current and past environmental management measures being implemented. The detailed comparative description of the proposed process modifications, corresponding material balances and the pollution control devices were also discussed in the report. Since the activities in oil refinery operations include handling substances classified as combustible and/or flammable, an Environmental Risk Assessment was also undertaken to assess the likelihood or probability of a hazardous accident. The PetroFCC Project ECC was secured in November 2006.

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

EPRMP for Petron Bataan Refinery’s Benzene, Toluene and Xylene Project (2007)

A year after the PetroFCC Project, the Refinery Division of Petron Corporation invested in a benzene, toluene and xylene (BTX) Project. The BTX Project involves both the revamp of existing process units as well as the addition of a new unit. The EPRMP scope essentially covered updating the data provided for the PetroFCC EPRMP. Since the ECC issued for the PetroFCC required the conduct of a full Quantitative Risk Assessment (QRA) of the existing refinery, as well as future projects, Petron commissioned a foreign entity to undertake the QRA. Preliminary results from the QRA were included in the EPRMP report prepared by Apercu. The ECC was acquired in July 2007.

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

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.

IEE for the Bolitoc Port Rehabilitation Project (2007)

The project is a load port rehabilitation project of the old pier in Brgy. Bolitoc, Sta Cruz, Zambales. It covers the rehabilitation of Bolitoc Port to stockpile, barge, ship load mineral ore and other bulk material ore for export. Other EIA studies for nearby industries served as the main source for secondary data. Air quality and noise sampling were conducted, in addition to flora and fauna survey. A marine biota survey was also conducted and marine water samples were also taken at the proposed pier area. Environmental management plans including a monitoring plan and matrix of mitigation and environmental management strategies were prepared for the rehabilitation project. The ECC was acquired in August 2007.

For a backgrounder on the IEE procedure you may go to our Services page.

IEE for 12 MW Rice hull/Coal power plant for Bataan 2020 (2007)

Apercu prepared an Initial Environmental Examination (IEE) Report for Bataan 2020 Inc. in 2006. The Bataan 2020 project is a 12.5 MW Rice Hull Power Cogeneration Project in its paper mill plant compound in Samal, Bataan. A detailed assessment of the probable impacts of the project was undertaken. Foremost of this was the conduct of air quality modeling to assess the impacts to ambient air. Air quality and deep well water quality assessment were also conducted, as well as flora and fauna surveys. A public consultation was also conducted and was attended by DENR representatives, the Proponent, the preparers and stakeholders. Other key issues related to the power plant development were considered with significant impacts being identified for each phase of the project. Appropriate mitigation measures for the identified impacts were then formulated. ECC was acquired in 2007

For a backgrounder on the IEE process you can go to our Services page.

EPRMP for Balai sa Laiya and Tivona Beach Resorts (2009)

EPRMP studies were conducted for both Balai sa Laiya Beach Resort and Tivona Beach Resort. These tourism projects are located on the seaside community of Brgy. Laiya and Hugom in San Juan, Batangas. These 2 tourism projects have been operating without an ECC, hence, an EPRMP study was conducted for these resorts. The surroundings and existing environmental management measures being implemented by the resorts were characterized. Because the projects are situated in a coastal tourism area, many mitigation measures were added to diminish the effects of the development on the surrounding area. The ECCs for both the project sites were acquired in 2009.

For a backgrounder on EPRMPs and the EIA system, please visit our Services page.

EPRMP for Petron Bataan Refinery’s Upgrade Projects (2010)

An Environmental Performance Report and Management Plan was prepared for the Petron Bataan Refinery Upgrade Project. The Upgrade Project will convert PBR into a full-conversion refinery, the only one in the Philippines.

The upgrade involved 3 components:

  • a. Refinery Master Plan II involving the installation of new equipment for several process units ( e.g., mercaptan oxidatin unit, vacuum distillation,coker, hydrotreater, sulfur recovery unit and the waste water treatment plant)
  • b. Additional Tank Farm; and
  • c. 140 MW Refinery Solid Fuel Fired Power Plant.

The project is located in the existing Petron Bataan Refinery in Brgy. Alangan, Limay, Bataan. The major hurdles for this project involved the clear and concise comparisons of the base case against the various upgrades, and the impact of these on waste streams and environmental management measures of the refinery. The refinery’s historical performance going back 5 years were evaluated as to their compliance to the relevant environmental standards. Environmental Risk Assessments were conducted for the additional tanks of benzene, gasoline and propylene as well as for the proposed power plant. The proposed power plant intends to use coal as its initial fuel and eventually shift to petcoke that is a byproduct of the coker unit that is being upgraded. Due to the number of ECCs that the refinery has had for its various expansion projects, these were integrated into a single ECC that was released in April 2010.

For a backgrounder on EPRMPs and the EIA system, please visit our Services page.

IEE for the Petron Bataan Refinery Propylene Pipeline Project (2010)

Apercu prepared the Initial Environmental Examination (IEE) of the Petron Bataan Refinery Propylene Pipeline Project. The project involves the installation of a 5.5 kilometer pipeline from Petron Bataan Refinery to Philippine Polypropylene Inc.’s (PPI) property located in the PNOC-Alternative Fuels Corporation (PNOC-AFC) Complex. This is located in Limay and Mariveles, Bataan. The 2 major activities of the study were plotting the structures and households along the pipeline route that traversed Roman Highway and the conduct of public consultation. Additionally, water quality was characterized for the two freshwater bodies that was to be traversed by the pipeline. The pipeline ECC was acquired in September 2010.

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.