GC Environmental Staff have written and presented numerous Technical Papers at conferences throughout the United States.  You are free to view and print them, but please note that they are copyrighted and are not to be used without the permission of the author.  We have provided them in Acrobat Reader format (.pdf extension) for your convenience.Acrobat Reader 

Fingerprinting Landfill Gas, Richard W. Prosser
This paper discusses tests that can be used to help determine the source of methane gas occurring in soil.

LFG System Design Utilizing the Finite Element Method, Daniel D. Waineo
This paper presents finite element modeling techniques that can be used by a LFG system designer to help optimize LFG collection systems. Two dimensional steady-state and transient finite element models are presented as examples.

Freezing Climate Design of Wet Gas Pipe Systems--Application to Landfill Gas Collection System, Kirk Hein
This paper discusses alternative methods of design and construction to protect LFG systems in cold climates.

Reviewing and Interpreting Landfill Gas Monitoring Data,
Richard W. Prosser
This paper discusses how to interpret data from a landfill gas collection and monitoring system and from the landfill's surface.

Landfill Gas Collection and Groundwater Protection,
Alan Janechek, Richard W. Prosser
The purpose of this paper is to describe methods for protection of groundwater by modifying existing operational procedures or existing collection systems.

An Economic Evaluation of Carbon Molecular Sieve Membranes in Landfill Gas Applications, Dick Prosser, Michael J. Ackerman, Paul K. T. Liu, Mehran G. Sedigh, Theodore T.
Tsotsis, and Muhammad Sahimi
This paper discusses the performance and economics of carbon molecular sieve membranes in landfill gas energy recovery applications.

Optimizing Landfill Gas Collection From Arid Landfills,
Richard W. Prosser
This paper discusses a different approach of collecting landfill gas from arid landfills which can improve methane quality and gas collection efficiency and can reduce LFG emissions.

Landfill Gas and Groundwater Contamination, Richard Prosser, Alan Janechek
As landfill gas (LFG) migrates from a landfill, organic contaminants travel with it.  These contaminants, commonly referred to as volatile organic compounds (VOCs), have been known to migrate to underlying groundwater. This paper looks at the mechanisms for contamination by LFG constituents and means of controlling it.

Proposed Solutions to Landfill Gas Contamination of Groundwater, Richard Prosser, Daniel Waineo
This paper looks at groundwater contamination mechanisms caused by landfills. It also evaluates different methods of slowing or eliminating this contamination.

The Effects of Atmospheric Pressure on the Availability of Gas from a Landfill, Richard Prosser
This paper examines the influence of atmospheric pressure upon a landfill gas system to quantify the effects of atmospheric pressure changes upon methane recoverability.

NSPS Tier III Alternative Procedure, Richard Prosser
Included in this paper are proposed alternative procedures for performing the tests necessary to quantify LFG flow rate, a site specific k value for use in the LFG generation model, and LFG NMOC concentrations.

Innovative Technologies to Remove Chlorinated Hydrocarbons and CO2 from LFG, Richard Prosser, Benjamin C. E. Schwartz, Muhammad Sabimi, Joseph S. Devinny, Reyes Mallada, and Theo Tsotsis
GC Environmental, Inc. and the Reaction Engineering & Transportation Group at University of Southern California are currently developing biofilters to remove chlorinated hydrocarbons and sulfur compounds and high temperature ceramic polymer membranes for CO2 removal.