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

Teterboro Landing Brownfields Redevelopment World’s 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 location of former building foundation Teterboro Airport jbierschenk@terratherm.com 2

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 3

3.2 acre treatment area Volume: • 93,500 m 3 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 4

In Situ Thermal Desorption 400 t 3 300 °C 200 t 2 100 t 1 Heater Heater t 1,2,3 = temperature progression 5

6

Subsurface design Multi-phase extraction well Horizontal vapor Heater Heater extraction well Cover 1.2 4 New fill 0.0 Existing fill Depth below original grade (m) -3.0 Sand -6.1 -4.9 16 TTZ depth -9.1 Varved silt and clay 7

907 heaters 35 MPE wells 116 horizontal SVE wells 80 TMP strings 8

Direct push Saved over $500,000 9

Locating old foundation footings

Shallow water table Contingency: 35 MPE wells 11

Groundwater influx 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 92 94 100 100 100 100 100 100 100 100 100 100 94 92 90 92 94 96 100 100 100 100 100 100 100 100 100 100 100 100 98 96 94 92 94 96 98 100 100 100 100 100 100 100 100 100 100 100 100 100 100 98 96 94 96 98 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 98 96 98 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 98 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 98 90 100 100 100 100 100 90 90 90 92 94 96 98 100 100 100 100 100 100 100 100 88 90 92 94 96 98 100 100 100 100 100 100 100 100 100 100 94 92 86 88 90 92 94 96 98 100 100 100 100 100 100 100 100 100 100 100 98 96 94 92 90 92 94 96 98 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 98 96 94 92 94 96 98 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 98 96 94 95 97 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 98 96 96 98 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 98 97 99 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 98 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 98 98 98 100 100 100 100 100 90 96 98 96 90 90 90 90 88 86 90 96 90 88 88 85 90 88

Impact of water flowing in 300 60 Duration (days) 250 Energy (million 50 kWh) Energy usage (million kWh) 200 40 Duration (days) 150 30 100 20 50 10 0 0 0 0.5 1 1.5 2 2.5 3 3.5 4 Groundwater inflow (m 3 /hr) 13

11 MW power supply 14

Vapor flow 4.900 m 3 /hr ( 3,000 scfm) Water treatment 11 m 3 /hr (50 gpm) • 13.500 kg COCs • CFC-113 • Hydrofluoric acid 15

When are we done? 1. Soil temperatures 2. Mass removal 3. Soil concentrations 16

80 vertical temperature profiles 17

Mass Removal • Total of 13.500 kg removed (30.000 lbs) 18

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 19

Soil concentration (mg/kg) 100000 0.0001 10000 0.001 1000 0.01 100 0.1 10 1 Chloroethane Final soil concentrations Sitewide Max. Initial Methylene Chloride Tetrachloroethylene Trichloroethylene 1,1-Dichloroethylene Sitewide Max. Final 1,1-Dichloroethane cis-1,2-Dichloroethylene trans-1,2-Dichloroethylene Freon-113 Remediation Goal 1,1,1-Trichloroethane Vinyl Chloride Benzene 20

Economics • Cost per cubic yard - $15 million / 122,300 cy = $120 per cy How much energy – 249 kwh/m 3 (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 jbierschenk@terratherm.com 21

BEFORE REMEDIATION 2011 AFTER REMEDIATION 2014 22