HIES has vast experience in Fuel Systems environmental management acting as liaison between service station owners and regulatory agencies such as the Department of Health and the EPA. With over 1000 UST closure experiences at various complex sites in Hawaii and the Pacific Rim, the company has expert knowledge of local geological and regulatory conditions throughout the region saving clients valuable time and money. Whether a clean/complex characterization or remedial action site, our in-depth site characterization expertise with innovative current solutions have regularly allowed clients to obtain site closures, no further action responses, or no further remediation determinations expeditiously.

Our company is also experienced with maintenance and monitoring as we at HIES have cleaned some of the largest US Department of Defense Facilities [US DoD]. Including a fuel tank in the Pacific specifically located in Sasebo, Japan as one of its numerous maintenance projects and has monitored large subsurface fuel plumes for the US DoD. Whether a small service station or a large fuel operations facility, HIES has the full service solution. Facilities that benefit from our services may include:

Commercial & industrial establishments

  Service stations

  Fuels terminals

  Bulk storage facilities

  Local, state and federal government agencies including DoD

  Fleet operators

Characterization: HIES engineers, scientists, and technicians are specialized in site characterization and saves clients considerably by proven expedited reporting, and analysis processes. Our geologists and hydrogeologists regularly provide site characterization data in the form of a Corrective Action Plan or Remedial Action Plan to our remedial design engineers.


  On site interpretation & data generation

  Real time sampling and analysis

  Real time new data response


Best Management Practices: BMP coupled with SPCC, RPCC, OHS, and other related plans, when developed and implemented properly, will help prevent the accidental release of hazardous materials into the environment.

   Document preparation & implementation

   Proven facilities technology

   Training programs & testing

   Client interaction & communications

Testing & Inspections

  Tank and line inspection and testing: annual tightness testing, leak detection systems maintenance, and UST dispenser calibration.

  API bulk fuel tank and piping inspections: 
non-destructive testing using API certified personnel.


Clean & repair

  Certification of gas   

  Free Repair or closure procedures

  Removal of all residual fuels 

  Tank replacement or tank closure

  Removal of water and sludge 

  New tank installation

   Interior tank cleaning

Long Term Monitoring:

  Monitors plume movements

  Installs and gauge monitoring wells and monitoring systems

  Plume analysis through remote sensing, surveying,

  GIS Emergency response spill containment system

  Forecasting and statistical plume analysis

  Gauging and sampling


Maintain and install OWS, AST, and customized extraction systems: 

  Design, build, and maintain remedial systems

  Design and install telemetry systems

  Design and install free product recovery systems

  Extraction and disposal services

With vast experience in the Fuel Infrastructure Industry since 1993, our scientists and engineers offer expert services for the following areas:

  Initial site assessment and investigations

   Fuel infrastructure design, O&M, and construction services

   Regulatory compliance expertise in RCRA, CERCLA, EPA, OSHA, and local/foreign regulations

 API inspections and tank/line O&M services

  On-site and in-house training programs for compliance, OSHA, DOT, DOH, and EPA

   Environmental management systems/best management practices, support, and development

   Compliance manual review and development

   Hazardous waste and hazardous materials management

  NPDES, SPCC, RPCC, permits, and planning

   Hazcom training and support

   Emergency response/training in spill response and containment

  Long-term monitoring and remedial services

   Site closures, characterization, and operator changes

   Remedial action, remediation system installation/support, and site restoration

HIES engineers, scientists, and technicians have the ability to understand complex environmental problems and routinely work with customers and regulators to help solve complex environmental issues.


Facility Permitting and Compliance

 Engineering design-structural electrical / mechanical

 Permitting management-plans & permits

 QA/QC testing

 Best management practices

 Compliance logs

 Operator/ownership changes

Fuels System Maintenance

 Tank cleaning

 Inventory management and leak detection

 Self compliance inspections

 API 653 & 570 inspections

 Repair & replace – piping, pumps, motors, welding, etc.

 Corrective action dispatching

 Deficiency tracking and management

Fuel System Management

 Remote leak detection/telemetry

 Secure web access

 24 x 365 alarm responses