Monitoring & Proxy Optimiser
The commercial argument of the platform: cheap in-situ measurements can stand in for laboratory analysis where the relationship is strong enough, and only where it is.
Projected annual saving
45,200
PHP-equivalent, analytical spend only
Analyst hours released
250
Redirected to field and community work
Regulatory coverage
Unchanged
SN5 and SN6 retain full laboratory analysis
Station-by-station recommendation
| Station | Current regime | Recommended regime | Confidence | Saving |
|---|---|---|---|---|
| SN1 | Monthly full laboratory suite | Monthly in-situ pH + EC proxy, annual laboratory auditStable, consistently within guideline | High | 8,400 |
| SN2 | Monthly full laboratory suite | Quarterly in-situ proxy, annual laboratory auditControl station, low variance | High | 9,100 |
| SN3 | Monthly full laboratory suite | Retain monthly laboratory suite (manganese anomaly open)Anomaly under verification — no reduction recommended | Moderate | — |
| SN4 | Fortnightly full laboratory suite | Fortnightly in-situ proxy, quarterly laboratory auditProxy relationship strong across seasons | High | 11,200 |
| SN5 | Fortnightly full laboratory suite | Retain full laboratory analysisModel uncertainty highest; regulatory reporting station | High | — |
| SN6 | Fortnightly full laboratory suite | Retain full laboratory analysisTreatment performance station; proxy residuals widest here | Moderate | — |
| SN7 | Monthly full laboratory suite | Monthly in-situ proxy, biannual laboratory auditCommunity-relevant intake — audit frequency kept above minimum | High | 7,600 |
| SN8 | Monthly full laboratory suite | Quarterly in-situ proxy, annual laboratory auditDownstream compliance point, consistently clean | High | 8,900 |
Applying writes an entry to the assurance log with the evidence and confidence at the time.
Proxy prediction vs laboratory result
Agreement is tight below 1.2 mg/L and loosens above it — which is exactly why SN5 and SN6 keep full analysis.
In-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.