Teterboro Landing Brownfields Redevelopment Worlds Largest In Situ - - PowerPoint PPT Presentation

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Teterboro Landing Brownfields Redevelopment Worlds Largest In Situ - - PowerPoint PPT Presentation

Nov 02, 2023 150 likes •376 views

Teterboro Landing Brownfields Redevelopment Worlds Largest In Situ Thermal Desorption Site John Bierschenk, Gorm Heron and Ken Parker, TerraTherm Inc., Gardner MA, USA 1 Teterboro Landing, NJ Approximate location of TTZ Approximate

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Teterboro Landing Brownfields Redevelopment World’s Largest In Situ Thermal Desorption Site

John Bierschenk, Gorm Heron and Ken Parker, TerraTherm Inc., Gardner MA, USA

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Teterboro Landing, NJ

Teterboro Airport

Approximate location of TTZ

Approximate location

  • f former building

foundation

2 jbierschenk@terratherm.com

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Background

  • Former Bendix aerospace campus/facility
  • Schedule-driven Brownfields redevelopment

project, 10 mi. from NYC

  • NJ Brownfield and Contaminated Site

Remediation Act of P.L. 1997 (N.J.S.A. 58:10B-l et seq.),

  • Up to 50% reimbursement of eligible

remediation costs

  • Conditions include obtaining NJDEP “No

Further Action” letter

  • Remediation Cost Containment Policy

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3.2 acre treatment area

Volume:

  • 93,500 m3

Treatment depth:

  • Average 7 m

COCs:

  • PCE, TCE, DCE

and CFC-113 Start concentrations:

  • 10-10,000 mg/kg

Estimated mass:

  • 13.500- 23.000 kg

(30-50,000 lbs) Goal:

  • 1 mg/kg

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°C

In Situ Thermal Desorption

100 200 300 400 Heater Heater

t1 t2 t3 t1,2,3 = temperature progression

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16 TTZ depth Varved silt and clay Sand Existing fill 4 New fill Cover Heater Multi-phase extraction well Heater 1.2 0.0

  • 3.0
  • 6.1
  • 9.1

Depth below original grade (m)

  • 4.9

Horizontal vapor extraction well

Subsurface design

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907 heaters 35 MPE wells 116 horizontal SVE wells 80 TMP strings

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Direct push

Saved over $500,000

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Locating old foundation footings

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Shallow water table

Contingency: 35 MPE wells

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Groundwater influx

100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 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Impact of water flowing in

10 20 30 40 50 60 50 100 150 200 250 300 0.5 1 1.5 2 2.5 3 3.5 4

Energy usage (million kWh) Duration (days) Groundwater inflow (m3/hr) Duration (days) Energy (million kWh) 13

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11 MW power supply

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Vapor flow 4.900 m3/hr ( 3,000 scfm) Water treatment 11 m3/hr (50 gpm)

  • 13.500 kg COCs
  • CFC-113
  • Hydrofluoric acid

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When are we done?

  • 1. Soil temperatures
  • 2. Mass removal
  • 3. Soil concentrations

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80 vertical temperature profiles

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Mass Removal

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  • Total of 13.500 kg removed (30.000 lbs)
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Soil sampling

Total number of borings:

  • 58 per plan, 1.5 m

sampling intervals

  • 65 (including repeat

borings) 296 soil samples collected Added 4 heaters in one small area

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Final soil concentrations

0.0001 0.001 0.01 0.1 1 10 100 1000 10000 100000 Chloroethane Methylene Chloride Tetrachloroethylene Trichloroethylene 1,1-Dichloroethylene 1,1-Dichloroethane cis-1,2-Dichloroethylene trans-1,2-Dichloroethylene Freon-113 1,1,1-Trichloroethane Vinyl Chloride Benzene

Soil concentration (mg/kg) Sitewide Max. Initial Sitewide Max. Final Remediation Goal 20

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  • Cost per cubic yard - $15 million / 122,300 cy = $120 per cy
  • How much energy – 249 kwh/m3 (174 kWh per cubic yard)
  • 29,800 lbs COCs removed – $503 per pound

IN CONTRAST:

  • Excavation was the only other alternative
  • Excessive cost (~ $30 million)

SUMARY:

  • Budget & Schedule achieved

Economics

21 jbierschenk@terratherm.com

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AFTER REMEDIATION 2014 BEFORE REMEDIATION 2011