SCS provided similar Landfill Gas engineering services to both landfills. The Dudaim Landfill is an active site comprising approximately 114 acres of which half is an older unlined area and half is a newer lined facility.  Teenim Landfill is approximately 82 acres and also has a portion that is unlined and is in the process of constructing several new lined cells.  Relative to the United States , the waste stream in Israel has a higher percentage of rapidly decomposable material (food waste).  Climatic conditions vary from arid at the Dudaim Landfill to semi-arid at the Teenim Landfill.  Prior to these projects, no landfill gas testing had been conducted at either site..

Both projects involve investigation and design phases.  

Both projects involve investigation and design phases.  The objectives of the investigation phase were to quantify the amount of LFG being generated and to evaluate the feasibility of utilizing the methane for energy recovery purposes.  This phase included the following specific tasks:

• Installation and monitoring of shallow test probes in the landfill

• Survey of nearby energy users that may utilize recovered LFG

• Modeling of LFG generation and recovery

• Preparing a conceptual design of the LFG collection system

• Analyzing the cost of various energy recovery alternatives

Energy utilization appears particularly promising at the Dudaim Landfill where a nearby polystyrene plant has steam boilers that could be retrofitted for LFG fuel.  The design phase for each project required SCS to develop construction drawings and technical specifications for LFG collection and flare systems.  These documents were developed for bidding purposes.  SCS was also tasked with construction-engineering services, including an initial site visit during installation of extraction wells and subsequent site visit during system startup.  Other services include review of submittals, field engineering to accommodate changed conditions, and preparation of operation and maintenance instructions.  Following the system startup, the LFG modeling results will be calibrated and measurements taken to finalize decisions regarding the installation of the necessary infrastructure for energy utilization.  If energy utilization is not deemed feasible, the collection and flare systems will be operated for LFG migration and emissions control purposes.