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Identification of manganese as a toxicant in a groundwater treatment system: Addressing naturally occurring toxicants

Conference ·
OSTI ID:458272
;  [1];  [2];  [3]
  1. EA Engineering, Science and Technology, Sparks, MD (United States)
  2. Star Enterprise, Fairfax, VA (United States)
  3. Environmental Science and Engineering, Fairfax, VA (United States)
Effluent from a groundwater remediation system at a bulk oil storage and distribution terminal has been chronically toxic to Ceriodaphnia dubia. The remediation system was designed in response to a hydrocarbon plume in the area of the terminal. The remediation system consists of a series of groundwater recovery wells and groundwater intercept trench systems with groundwater treatment and phased-separated hydrocarbon recovery systems. The groundwater treatment and petroleum recovery systems consist of oil/water separators, product recovery tanks, air strippers, filters, and carbon adsorption units. The characteristics of this effluent are low total suspended solids, total dissolved solids, and hardness concentrations as well as meeting stringent NPDES permit requirements for lead, copper, zinc, mercury, total petroleum hydrocarbons, and BTEX. Additional priority pollutant evaluations revealed no compounds of concern. Performance of a Toxicity identification Evaluation (TIE) indicated that manganese was the principle toxicant in the effluent. Manganese is a naturally occurring constituent in this groundwater source and is not added to the treatment system. This paper will present the results of the TIE with a discussion of treatability/control options for manganese control at this facility. Recommendations for addressing naturally occurring toxicants that are not a result of the facility`s operations will also be presented.
OSTI ID:
458272
Report Number(s):
CONF-961149--
Country of Publication:
United States
Language:
English