Metals Treatment
& Chemical Fixation

Remedial Construction

MAECTITE™ chemical treatment is a treatment process to chemically fixate heavy metals

MAECTITE™ chemical treatment is a process which chemically fixates heavy metals to lower solubility/leachability mineral forms resistant to environmental degradation. Specifically, MAECTITE™ chemically bonds leachable metal species into hardened mineral forms (primarily apatite), producing no volume increase after treatment. MAECTITE™ can be effectively applied in situ, ex situ, and inline.
Sevenson first used MAECTITE™ in 1993, and has since treated over three million tons of contaminated material on 320 projects, in 43 states, within 10 USEPA Regions.

MAECTITE™ has been rigorously reviewed by regulatory agencies and has passed multiple performance standards, including:

  • ANS 16.1 (modified)
  • WET (Cal-wet)
  • ASTM column leaching test

We have successfully developed and implemented site specific health and safety plans since 1979. With a full time staff of 30 full-time Health and Safety Officers that include CHST’s and OHST’s, our Site Safety and Health Officers average 14 years of service.

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