Gradient

Senior Scientists

 Andrew B. Bittner, M.Eng., P.E.
Email VCard Bio

Education

M.Eng., Environmental Engineering and Water Resources, Massachusetts Institute of Technology

B.S.E., Environmental Engineering, University of Michigan

B.S., Physics, University of Michigan

Licensed Professional Engineer in New Hampshire and Idaho

Expertise

  • NAPL Transport
  • Groundwater & Surface Water Modeling
  • Groundwater Hydrology
  • Soil Vapor Intrusion Modeling
  • Hydraulic/WWTP Modeling

Andrew B. Bittner, M.Eng., P.E.

Principal Scientist

Email VCard Bio

Mr. Bittner is a licensed environmental engineer with over 19 years of experience specializing in the fate and transport of contaminants in porous and fractured media, coal combustion products, groundwater and surface water modeling, and groundwater corrective actions.  Mr. Bittner has applied these skills for a wide range of projects including the  development of cost-effective remedial solutions, regulatory comment, litigation support, and environmental forensic analyses at pharmaceutical facilities, Superfund sites, coal ash landfills and surface impoundments, manufacturing plants, and dry cleaning facilities.  In particular, Mr. Bittner has extensive experience developing risk-based remedial strategies, designing remedial investigations, delineating and characterizing the distribution of environmental pollutants, and overseeing remedial operations in South America.   

Education

M.Eng., Environmental Engineering and Water Resources, Massachusetts Institute of Technology

B.S.E., Environmental Engineering, University of Michigan

B.S., Physics, University of Michigan

Licensed Professional Engineer in New Hampshire and Idaho

Expertise

  • NAPL Transport
  • Groundwater & Surface Water Modeling
  • Groundwater Hydrology
  • Soil Vapor Intrusion Modeling
  • Hydraulic/WWTP Modeling

Services

Representative Projects

Cost Allocation:  Consulting expert for a large scale cost allocation litigation at a Midwestern Superfund site.  The project involved a forensic evaluation of the sources of tar to river sediments considering site industrial operational history, contaminant fate and transport, and observed contaminant patterns.  The project also included the detailed calculation of tar mass present in the environment using both visual observations and analytical data.

Groundwater and Solute Transport Modeling:  For a PRP group, developed a 3-D numerical groundwater and solute transport model for PCE at a Superfund site in New Hampshire.  Calibrated the model using approximately 10 years of data with review and oversight by EPA and USGS.  Designed an optimization algorithm to develop optimal groundwater pump-and-treat system.

Groundwater and Solute Transport Modeling:  Developed a 3-D numerical groundwater and solute transport model for a site in Brazil using MODFLOW and MT3D for volatile organic compounds and pesticides.  Used the model to evaluate hydraulic barrier remediation alternatives.

Hydraulic Modeling of WWTPs:  Built hydraulic models of industrial wastewater treatment plants for major pharmaceutical manufacturing facilities and municipal treatment plants around the world.  The models were used to evaluate hydraulic capacity, to design new treatment facilities, and to resize existing system components within the treatment plants.

Metals Fate and Transport Modeling: Evaluated technical approach used by US EPA to simulate the migration of arsenic, selenium, and other metals in groundwater from overlying coal combustion storage units.  Model analyses were included in regulatory comments submitted in response to US EPA's 2010 Coal Combustion Product Risk Assessment.

NAPL Transport:  Evaluated vertical and lateral NAPL mobility and travel times through vadose and saturated zones.  The analysis indicated negligible risk due to off-site NAPL migration.

Coal Ash Decision Framework: Developed decision framework that aids utilities in selecting coal ash surface impoundment closure plans. Framework considers impacts to groundwater, surface water, and air, as well as risks to workers and consumption of national resources.

Surface Impoundment Failure Analysis: Evaluated duration of risk of coal ash surface impoundment structural failure using statistical approaches.  Estimated the time required for coal ash fluids in an impoundment to either completely infiltrate or evaporate, thereby eliminating the risk of impoundment sidewall failure.

Selected Publications

Herman, K; Flewelling, SA; Bittner, AB; Tymchak, MP; Swamy, M.  2015. "Alternate Endpoints for Remediating NAPL-Impacted Sites." Presented at EPRI/AWMA Env-Vision Conference, Crystal City, VA, 19p.

Lewis, A; Bittner, AB; Herman, K; Dube, EM; Long, CM; Hensel, BR; Ladwig, KJ.  2015. "Framework for evaluating the relative impacts of surface impoundment closure options." Presented at World of Coal Ash (WOCA) 2015, Nashville, Tennessee, May 5-7, 3p.

Esakkiperumal, C; Bittner, AB.  2013. "Successful Implementation of a Risk-Based Remedial Solution in Brazil." Presented at 2013 National Ground Water Association Ground Water Summit, 26p.

Herman, KD; Bittner, AB.  2008. "Reducing Uncertainty in DNAPL Characterization." 24th Annual International Conference on Soils, Sediment, and Water, 31p.

Bittner, A; Halsey, P; Khayyat, AMA; Luu, K; Maag, B; Sagara, J; Wolfe, A.  2002. "Drinking water quality & point-of-use treatment studies in Nepal." Civil Eng. Pract. 17 : 5-24.