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Environmental and Geotechnical Construction Services

Chemical

Former Carbon Black Facility Closure - Southwest

  • Closure activities at a former carbon black production facility in preparation for redevelopment
  • Dewatering four permitted storm water, process water ponds and the former tank farm area
  • In-situ solidification, excavation, and off-site disposal of 27,100 tons of pond solids
  • Excavation and off-site disposal of 8,616 tons and on-site placement of 11,806 tons of former tank pad and production area soils
  • Re-grading and/or placement and compaction of approximately 8,000 tons of structural fill

ENTACT was engaged to perform closure activities at a former carbon black production facility in preparation for future redevelopment. Scope of work included clearing and grubbing; relocation of conveyance storm water piping to the on-site ditch or pond; closure of the on-site waste water system; dewatering four permitted storm water and process water ponds and the former tank farm area; in-situ solidification, excavation, transportation and off-site disposal or placement in the on-site landfill of 27,100 tons of pond solids; excavation, transportation and off-site disposal of 8,616 tons and on-site placement and consolidation of 11,806 tons of former tank pad and production area soils; re-grading and/or placement and compaction of approximately 8,000 tons of structural fill in affected areas to promote positive drainage; and revegetation with native grasses. ENTACT developed the mix designs in our bench-scale treatability laboratory and accomplished in-situ solidification utilizing bucket mixing techniques and pneumatic delivery of Portland cement and Calcium Oxide in varying percentages to the respective ponds.