Underground Storage Tank (UST) Removal & Closure Services

NorthStar will coordinate and manage the removal and replacement of above and underground storage tanks. We have handled the excavation and removal of tanks ranging from 275-gallons to 10,000-gallons in size.

In the event of a release NorthStar will handle all notifications required by law and will coordinate the removal and disposal of contaminated soils and groundwater. Following the tank removal and/or soil remediation NorthStar will collect confirmatory soil samples from the sidewalls and base of the excavation for analysis of constituents of concern specified by the Connecticut DEP. All samples collected by NorthStar will be analyzed by a state certified laboratory and NorthStar will provide you with a tank closure report certifying that the tank has been removed in accordance with all local and state regulation. Closure reports may be required by the local Fire Marshall and the State of Connecticut Department of Environmental protection, and provide a perspective property buyer proof that tank closure was conducted properly.

NorthStar offers free estimates and initial consultaions.

Potential Indicators that there MAY BE a Leak Associated with Your Heating Oil Tank:

The average life expectancy of Underground Storage Tanks is approximately 15 to 20 years. Tanks that have been in the ground longer than 20 years have a higher incident rate of failure due to corrosion and natural degradation of the tank. Some common indicators that there may be a leak associated with your tank include:
• Unexpected or unexplained increases in consumption of fuel oil that don't correlate to increased use of the heating system.
• Chronic problems with your oil burner
• Discolored or dead vegetation in the area of your storage tank or associated piping.
• Strange odors, tastes, or discoloration in drinking water drawn from an on-site well.
• Petroleum staining on floors and walls adjacent to a tank stored in the basement.
• Oil or a petroleum sheen on water in a basement sump or on nearby streams, ponds, or drainage ditches.


Phase I Environmental Site Assessments

A Phase I Environmental Site Assessment is an important tool in any real estate transaction.  The purpose of the Phase I is to identify areas of environmental concern (aka Recognized Environmental Conditions) and to determine what level of risk and potential liability is associated with a property.

NorthStar has conducted assessments on a variety of properties ranging from vacant lots to major industrial facilities and our pricing is scaled to reflect the complexity of each individual job.  All of our assessments are conducted in accordance with the American Society of Testing and Materials (ASTM) Standard Practice 1527-05 and the regulations laid out in the US Environmental Protection Agency’s (EPA) All Appropriate Inquiry (AAI).


Transaction Screening Asssessments

A Transaction Screen is a less rigorous assessment that may be appropriate for low risk properties that require a lesser degree of investigation.  This level of assessment is often appropriate for residential properties, professional offices, or retail spaces where the owner possesses a solid grasp of the sites history.  All Transaction Screens are conducted in accordance with the ASTM standard practice 1528-06. 

If information is uncovered during the course of a Transaction Screen that suggests a need to up-grade the level of assessment we will contact you immediately and if a decision is made to upgrade the assessment to a Phase I ESA the full cost of the Screen will be credited towards the Phase I.


Phase II Environmental Assessments

If areas of environmental concern/ recognized environmental conditions are identified during a Phase I assessment then the next step in the investigatory process is a Phase II ESA.  The Purpose of the Phase II is to determine if any contamination associated with the potential areas of concern in fact exists at the property.  Phase II assessments vary significantly based upon the specific areas of concern present at a property and each Phase II assessment is designed to meet the individual needs of each site.  Common elements used in this phase of investigation include the advancement of test borings for soil sampling, the installation of groundwater monitoring wells, the advancement of test pits, soil gas surveys, and geophysical surveys. 

NorthStar subcontracts several drilling companies, analytical laboratories and geophysical companies to provide our clients with the best possible consulting services.  All drilling companies and laboratories performing subcontractor services for NorthStar are licensed by the appropriate state agencies and are fully insured.

Phase III Environmental Assessments

If significant contamination is detected at a property a Phase III site assessment is usually the next step in the investigatory process. The purpose of the Phase III is to delineate the extent and degree of contamination present at the subject property and generally consists of additional soil and groundwater sampling in areas where contamination was detected. Information generated as part of the Phase II and Phase III will generally allow for the development of a remedial action plan and remedial cost estimates.

Site Remediation Services

The goal of any remedial effort is the clean-up any contamination or pollution so that it no longer poses either a threat to human health or presents a risk of future regulatory action.

NorthStar has the expertise to design, implement remedial action plans for properties of all sizes and we will manage and verify that all soil and groundwater remediation programs are conducted in accordance with the Remediation Standard Regulation.  When appropriate, our staff will work closely with the appropriate state, local, or federal agencies to include them in the decision making process and insure that any regulated remedial efforts proceed smoothly.

LEP Services

Dr. Ferreira is a Licensed Environmental Professional with the state of Connecticut and is qualified and empowered to conduct environmental site assessments, investigate and remediate properties and to verify that remediation of a site has been achieved in accordance with the Remediation Standard Regulations.



Asbestos Inspections

In addition to the other site assessment services listed above NorthStar conducts asbestos inspections for buildings of all sizes. Dr. Ferreira is certified as an Inspector and Management Planner under TSCA Title II AHERA and is licensed by the state of Connecticut.

Toxic Exposure Assessments


If you suspect that you or a loved one have experienced a toxic exposure, Dr. Ferreira can help assess your exposure and develop a plan to speed the removal of toxins from the body naturally. For more information on toxic exposures and Environmental Medicine visit