Closure Intelligence Home
62%
Weighted across four domains
4
2 requiring verification
6
Ranked by materiality below
78%
Remote sensing is the oldest domain
Priority insights
Ranked by materialityIn-situ pH and electrical conductivity predict laboratory dissolved-copper results with R² 0.83 across 98 samples, so routine monitoring at 5 of 8 stations can shift to low-cost proxies while full laboratory analysis is retained at SN5 and SN6.
Projected reduction: 45,200 PHP-equivalent per year in analytical spend and 250 analyst hours released, at unchanged regulatory coverage.
Recommended action
Apply the recommended proxy regime at SN1, SN2, SN4, SN7 and SN8, and keep full laboratory analysis at SN5 and SN6.
Owner: Monitoring Lead · By: Before the October sampling round · Advisory only, a named human role decides.
Microbial community structure and water chemistry jointly separate SN5 as acid-drainage impacted, distinct from all other sources on site.
Recommended action
Maintain the passive limestone treatment and extend sampling two stations downstream of SN6 to confirm attenuation.
Owner: Closure Environment Manager · By: Next sampling round, October 2026 · Advisory only, a named human role decides.
The proposed northern diversion improves water quality in the northern catchment but reduces irrigation reliability in a zone where water access is the highest-ranked community priority, so consultation is required before design lock-in.
Recommended action
Convene a community consultation on diversion alignment before committing to detailed design; present all three options with their irrigation consequences.
Owner: Closure Manager with Community Liaison · By: Within 30 days · Advisory only, a named human role decides.
On the current trajectory, SN5 copper concentration meets the domestic water standard within 9–14 months.
Recommended action
Schedule limestone media replenishment ahead of the forecast plateau and re-run the forecast after two further rounds.
Owner: Water Treatment Supervisor · By: 31 January 2027 · Advisory only, a named human role decides.
Waste Dump B is the highest-priority revegetation target: elevated copper, existing hyperaccumulator species present, low slope instability, and adjacent active farmland.
Recommended action
Stand up a 0.5 ha assisted-revegetation trial plot on Waste Dump B using locally present tolerant species.
Owner: Rehabilitation Lead · By: Start of the 2027 wet season · Advisory only, a named human role decides.
Zone C soils and water indicate suitability for non-accumulating crop varieties; Zone A remains under review pending confirmation sampling.
Recommended action
Publish zone guidance for non-accumulating varieties in Zone C and schedule Zone A confirmation sampling before advising there.
Owner: Agronomy Adviser with Community Liaison · By: Before the next planting window · Advisory only, a named human role decides.
Manganese at SN3 has risen for three consecutive sampling rounds against the site-wide trend and is flagged for targeted verification.
Recommended action
Collect duplicate verification samples at SN3 with field blanks before treating the rise as a real trend.
Owner: Monitoring Lead · By: Within 21 days · Advisory only, a named human role decides.
A gully headcut on the Waste Dump A north batter advanced 4.2 m between survey epochs, exposing fresh sulfidic material.
Recommended action
Install temporary erosion control at the headcut and add it to the wet-season inspection route.
Owner: Rehabilitation Lead · By: Before November 2026 · Advisory only, a named human role decides.