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WASTEWATER MANAGEMENT
Tailings Dam No. 5A is a zoned, earth-filled catch-all dam with a twin concrete lined decanting system and a 600-meter span 4.0 x 5.0 meter concrete lined diversion tunnel.
A 12-meter freeboard is maintained to handle a 600-year flood event.
The Dam is the 3rd stage of the detoxification process where natural cyanide degradation occurs prior to the 4th stage detox and decantation of the final effluent.
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Migratory birds (wild ducks) frequently visit the dam |
Consistent with the Company's Integrated Management System, the Mill Group, Research & Development Department, Tailings Dam Department, Project Engineering Department and the Mines Environmental Protection and Enhancement Unit work together to sustain compliance with the effluent standards & water quality criteria set by DENR under RA 9275 & its IRR.
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Mill Tailings Undergo a Detoxification Process |
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1st Stage Detoxification Reactor at the CIP |
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Two-Stage Washing and Water Recovery at the Mill Area |
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2nd Stage Detoxification Reactor Located at the Mill Area |
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The Lime Slaking Plant Located Upstream of the Dam for pH Adjustment |
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4th Stage Detox Plant (INCO/SO2 Process) at the Dam's Decant |
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Sampling and monitoring of the dam's effluent and water quality criteria of the receiving water body is conducted daily.
This activity is also being conducted by the Multi-Sectoral Monitoring Team (MMT) of the Mine Rehabilitation Fund Committee chaired by the Mines & Geosciences Bureau of the Department of Environment & Natural Resources.
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| AIR QUALITY MANAGEMENT |
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Quarterly monitoring and sampling of the ambient air quality within the residential and industrial areas of the Company are being undertaken using high volume and 3-gas samplers.
The present concentrations of air pollutants are well within the air quality standards set under RA 8749 also known as the “Philippine Clean Air Act & its IRR indicating that the ambient air is "good quality".
Noise sampling are also conducted in these areas in compliance with WHO, occupation safety and health standards, and Philippine ambient noise standards.
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SOLID WASTE MANAGEMENT |
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Compliant with RA 9003, we are maintaining our controlled dump facility for the disposal of residual domestic wastes.
Domestic wastes are sorted by residents for re-use & recycling.
To enhance these practices, we are embarking on the Materials Recovery Facility in partnership with the host communities and non-government organizations within the company.
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HAZARDOUS WASTE MANAGEMENT |
Management of hazardous wastes as provided for under RA 6969 also known as the "Hazardous Substances, Toxic Chemicals and Nuclear Waste Act" and its IRR includes the installation of oil-water separator systems in relevant areas such as motorpools and repair shops.
Used discarded lead-laced crucibles and other non-useable hazardous materials from the Assay laboratory are encapsulated / fixated and entombed on-site; washed empty CN drums & other HW of the like are sold/disposed of to DENR accredited Treatment, Storage and Disposal (TSD) facilities.
A system procedure in the management and disposal of hazardous waste is in place within our Integrated Management System.
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