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Site Cleanup

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Site Cleanup & Options. KCDT Metro Facilities North Site 1602 N Northlake Place, Seattle ... Site Cleanup. Task 1 Tank Farm Demolition & Shallow Soils Metals ... – PowerPoint PPT presentation

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Title: Site Cleanup


1
Site Cleanup Options
  • KCDT Metro Facilities North Site 1602 N Northlake
    Place, Seattle
  • Former Chevron Bulk Fueling Terminal 100-1327

2
Model Toxics Control ActCleanup
RegulationsChapter 173-340 WAC
  • Washington State
  • Process for Cleanup of
  • Contaminated Sites

3
Site Cleanup Players
  • Ecology Maura S. OBrien, PG/HG
  • Ben Amoah-Forson, PE
  • Rebekah Padgett, PIO
  • KCDT Metro Transit Div Judy Riley
  • Sheldon Teel, PE
  • J Paul Miller, PE
  • Chevron Texaco Gerald ORegan
  • SAIC Timothy Warner
  • Russell Shropshire, PE
  • CDM Mark Adams, PG
  • Others

4
Focus
  • Site Cleanup Status
  • Options
  • Schedule for Options

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9
Site Cleanup
  • Task 1 Tank Farm Demolition
  • Shallow Soils Metals Removal
  • completed 99
  • Task 2 Cleanup Deeper Soils
  • Groundwater - 99-present
  • Task 3 Compliance Monitoring -On-going

10
Task 2 Cleanup Deeper Soils Goundwater
  • Three methods used in Task 2
  • HP Injection -99-01
  • Enhanced Fluid Recovery -01
  • Biosurging -02-03
  • Results monitoring -present
  • -Other methods???

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Options
  • Restrictive Covenant placed on
  • property deed
  • Capping and Restrictive Covenant
  • Excavation
  • Other ???

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16
Options with Compliance Monitoring
  • Restrictive Covenant requires
  • long-term monitoring
  • Capping requires RC long-term monitoring
  • Excavation CM ---Finished

17
Compliance Monitoring
  • Task 2 Cleanup
  • Excavation soil removed, then
  • one sampling event
  • Groundwater -
  • Four Quarters below cleanup levels, possibly
    periodic monitoring each 5 yrs
  • Source removal then periodic monitoring may not
    be required

18
Schedule for Options
  • RC anytime, then 5 yr monitoring
  • Capping RC then 5 yr monitoring
  • Excavation few months, then compliance
    monitoring
  • Soils once
  • Groundwater four quarters below cleanup level
    1 to 2 years
  • Notice of Completion

19
Questions.
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