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Calcimator

Remediation Timeline Calculator

Estimate total project duration from investigation through regulatory closeout by remediation technology.

Inputs

Results

Operation (months)

40

Total duration (months)

116

Total duration (years)

9.7

Investigation (months)9
RI/FS (months)13
Design & permitting (months)9
Construction (months)5
Closure monitoring (months)30
Regulatory closeout (months)10
Longest phase (months)40
How to Use This Calculator
  1. Enter site size in acres from the property survey or remedial investigation boundary.
  2. Rate contaminant complexity (1=simple petroleum, 5=mixed chlorinated solvents/metals).
  3. Select the remediation technology (pump-and-treat, soil excavation, in-situ, MNA, or thermal).
  4. Rate regulatory burden (1=low, 5=high state oversight) and select your state program.
  5. Review phase durations (investigation, RI/FS, design, construction, operations) and total project timeline.

How the result changes with Contaminant complexity (1-5)

Contaminant complexity (1-5)Operation (months)Total duration (months)Total duration (years)
1.428978.1
2.4351089
3.64412110.1
4.65113211

What each input means

Site size (acres)
Approximate size of the contaminated area in acres.
Contaminant complexity (1-5)
1 = single petroleum compound, 5 = mixed waste with metals, chlorinated solvents, and PFAS.
Technology (0-4)
0 = Excavation, 1 = Pump-and-Treat, 2 = SVE, 3 = In-situ Chemical, 4 = MNA.
Regulatory burden (1-5)
1 = simple state VCP, 5 = federal Superfund NPL site.
Phase II ESA complete (0/1)
Set to 1 if Phase II environmental site assessment is already done.
Community involvement (1-5)
1 = industrial zone, 5 = residential area with community advisory group.

What each result means

Investigation (months)
Phase II ESA and supplemental investigation.
RI/FS (months)
Remedial investigation and feasibility study.
Design & permitting (months)
Remedial design, permitting, and public comment.
Construction (months)
System installation or excavation execution.
Operation (months)
Active treatment or monitoring operation phase.
Closure monitoring (months)
Post-remediation confirmation monitoring.
Regulatory closeout (months)
NFA letter, deed restrictions, or site closure.
Total duration (months)
Total estimated project duration from start to closeout.
Total duration (years)
Total project duration in years.
Longest phase (months)
The critical path phase driving overall duration.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Site size (acres) = 2, Contaminant complexity (1-5) = 3, Technology (0-4) = 1, Regulatory burden (1-5) = 3 = 6 input(s) provided
  2. Calculate Operation
    Operation
    40 = 40
  3. Calculate Total duration
    Total duration
    116 = 116
  4. Calculate Total duration
    Total duration = totalMonths / 12
    9.7 = 9.7
  5. Calculate Investigation
    Investigation
    9 = 9
  6. Calculate RI/FS
    RI/FS
    13 = 13

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