•  Construction
  •  Design/Build
  •  OM & M
  •  Post-Closure Care
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SCS-FS offers a unique blend of proven state-of-the-art technology for the management of LFG.  These services meet the needs of landfill owners/operators, LFG developers, and engineering firms.  Drivers for LFG projects are:

·         Migration Control—To control subsurface migration of LFG beyond the landfill boundary or into structures on or adjacent to the landfill.

·         Odor Control—To abate severe odors emanating from landfills.

·         Utilization—To capture as much
LFG as is being generated to fuel utilization facilities.

·         Emission Control—To bring the landfill into compliance with Clean Air Act regulations and/or local or state regulations, and to reduce emissions of greenhouse gases.  See the subsection “Clean Air Act Compliance” for further information.

SCS-FS can provide all necessary OM&M services for LFG migration control systems, or can provide part of these services with the balance provided by the landfill operator.  At some sites, leachate system OM&M services are included in our scope.  Tasks can include the following:

·         Monitoring of test wells and monitoring probes to assess control system effectiveness.

·         Report preparation and submittal in accordance with regulatory agency requirements.

·         Monitoring and adjustment of control system components, including extraction well valving, isolation valves, pump station valves, etc.

·         Balancing of wellfield flow and vacuum distribution to improve migration, surface emissions, and/or odor control.

·         Maintenance and repair of control system components including extraction blowers, flares, flame arrestors, collection wells, headers and laterals, condensate drains, sumps, pumps, and storage tanks, monitoring wells, automatic gas detection systems, leachate system components, etc.

·         Quick response (within 4 hours) to outages or problems reported by the landfill operator or by the telemetering system.  We respond around the clock.

·         Flare exhaust stack sampling and analysis of emissions.

·         Maintenance of site grades to prevent on-site ponding and to control erosion.

·         Site investigations and reporting.

·         Technical support and negotiations for permitting and permit compliance.

The release of odiferous compounds from a landfill calls undue attention to the site.  LFG is odorless, however it can act as a vehicle to carry malodor compounds from the waste mass.  SCS is involved in the operation and maintenance of systems to control odors as well as monitoring for odors before they become a paramount issue.  These services might include any of the following: 

·         Sampling and analysis of LFG for the presence of trace volatile organic compounds.

·         Odor-panel testing.

·         Short- and long-term ambient air monitoring in neighborhoods near and down-wind from landfills.

·         Air monitoring during excavation of old landfill sites.

·         Field olfactometry measuring and quantifying odor strength in the ambient air.

Similar to migration control system services, SCS-FS provides start-up and on-going OM&M services for LFG recovery systems.  Typical tasks include:

·         Start-up, balancing and adjustment of wellfields.

·         Certification of gas flows. 

·         Maintenance and repair of recovery wells, appurtenant valving and metering, header lines, condensate drains, condensate pumps and piping, access manholes, etc.

·         Maintenance, adjustments, and repairs of blowers, flares, compressors, and appurtenances.

·         Condensate management; i.e., storage and disposal.

·         Replacement of recovery wells and condensate drains as necessary.

·         Major overhauls of header piping system as necessary.

·         Maintenance of site grades to prevent on-site ponding of rain and irrigation water.

·         Performance review of recovery wellfield; subsequent adjustment and rebalancing.

·         Develop and maintain LFG quality and operations databases, and prepare reports for owners and regulatory agencies.

·         Safety plans and methodology.

·         Technical support, reports, and negotiations for permit compliance.

·         Web based data services.

LFG emissions can cause release toxic trace constituents to the atmosphere, contribute to photochemical smog, and contribute to greenhouse gases.  Under the Clean Air Act, the United States Environmental Protection Agency (EPA) promulgated New Source Performance Standards (NSPS) for “new” municipal solid waste landfills and Emission Guidelines (EG) for “existing” landfills. 

The NSPS and EG require a three-tiered approach for assessing whether emission controls are needed and requires quarterly surface emission monitoring, which is intended to assess the adequacy of the emission control system.  The tiers are (1) desktop calculations to estimate air emissions, (2) field sampling to calculate mass emissions, and (3) gas flow testing, and, as needed, installation of control facilities.

Ten years prior to the EPA’s action, in southern Cal­ifornia, the South Coast Air Quality Management District (SCAQMD) Rule 1150.1 required surficial monitoring.  SCS has been conducting surface emission monitoring and mitigating exceedances since then. 

Tasks that SCS has been involved in regarding landfill emissions are:

·         NSPS and EG surface emission testing.

·         Tier I calculations, Tier II testing, and Tier III tests in special situations.

·         SCAQMD Rule 1150.1 surficial emissions organic vapor analyzer surveys.

·         Sampling and analysis of LFG for trace component characterization.

·         Ambient air monitoring in and around landfills.

·         Health and safety plans for worker and community protection.

·         Reports, technical support, and negotiations for regulatory compliance.

·         Develop and implement a written Start-up, Shutdown, and Malfunction (SSM) plan according to the provisions in 40 CFR 63.6(e)(3).