Workflow

Summary decision report

Which sites need a decision, why, and what is the likely consequence of each available action?

Sites requiring decision

2 due this week

High priority sites

Sites with open delineation

Lateral or vertical closure unproven

Estimated remediation exposure

$4.8M

Baseline Tier 1 basis

Potential reduction opportunity

$2.3M

Portfolio decision register

Select a site to open its decision report.

Illustrative prioritization

Site	Priority	Hydrocarbons	Metals	PAHs	Salinity	Delineation	Est. volume	Est. cost	Recommended next action	Status
Fox Creek 14-22 SD-0142 · Fox Creek	92	Exceed	Pass	Review	Exceed	Open to the north-east - 2 endpoints unresolved	4,860 m³	$1.2M	F3 soil vs. eco-contact pathway at BH-04	Remediate
Chinchaga 8-30 SD-0139 · Chinchaga	78	Review	Pass	Pass	Exceed	Open on 3 of 4 boundaries	9,420 m³	$2.7M	Salinity plume open laterally, vertical closure unproven	Delineate
Simonette 2-7 SD-0136 · Simonette	64	Exceed	Pass	Review	Pass	Delineated on all boundaries	2,180 m³	$690K	Exceedance driven by an excludable irrigation pathway	Risk-based
Gold Creek 11-4 SD-0131 · Gold Creek	41	Review	Pass	Pass	Pass	Delineated	640 m³	$208K	Dissolved F2 stable across four monitoring rounds	Monitor
Wapiti 6-19 SD-0128 · Wapiti	12	Pass	Pass	Pass	Pass	Delineated	-	-	All analyte groups below Tier 1 criteria	Closure ready

Fox Creek 14-22 decision report

SD-0142 · Fox Creek · updated Aug 18, 2026

Remediate

F3 soil vs. eco-contact pathway at BH-04

Analyte group status

HydrocarbonsExceedance
3.40× Tier 1 criteria
MetalsPass
0.42× Tier 1 criteria
PAHsReview
0.96× Tier 1 criteria
SalinityExceedance
1.80× Tier 1 criteria

Delineation and extent

Lateral extent: Open to the north-east - 2 endpoints unresolved
Vertical closure: Closed at 7.5 m (F3 < guideline)
Controlling pathway: Eco direct contact / soil-to-groundwater
Controlling analytes: Hydrocarbons, PAHs, Salinity

Site priority

What contributes to this site's priority.

Illustrative prioritization

92/100

Site priority

Exceedance severity+33
Controlling analytes+17
Open lateral or vertical delineation+14
Sensitive pathway or endpoint+18
Estimated remediation volume+8
Decision uncertainty+3

Decision confidence

High

Data completenessHigh
Delineation completenessMedium
Laboratory evidenceHigh
Unresolved endpointsMedium

Illustrative confidence

Vertical concentration and closure

F3 concentration against Tier 1 criteria with depth, mg/kg.

Remediation volume scenarios

Estimated volume and cost for each defensible scenario.

Illustrative scenarios

Tier 1 - all pathways · Current controlling case$1.2M
Tier 2 - eco contact refined · Requires site-specific soil texture$842K
Tier 2 - irrigation excluded · Defensible; no irrigation licence on quarter$664K
Risk-based management · Requires regulator engagement$386K

Remediate

$1.2M

Estimated cost

Timeline: Q1 2027, 9 weeks on site
Confidence: High

Key assumption: Tier 1 exceedance shell, all pathways retained

Further delineation

$186K

Estimated cost

Timeline: Q4 2026, 3 weeks on site
Confidence: Medium

Key assumption: Two open north-east endpoints closed with 6 step-out boreholes

Risk-based evaluation

$386K

Estimated cost

Timeline: Q1 2027, regulator dependent
Confidence: Low

Key assumption: Eco contact pathway refined with site-specific soil texture

Potential cost reduction

Baseline remediation against the lowest defensible scenario for this site.

Illustrative scenarios

Baseline remediation estimate

$1.2M

Tier 1 - all pathways

Lowest defensible scenario

$386K

Risk-based management

Potential difference

$854K

69% below baseline