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Underground Storage Tanks (USTs)
This client came to us after having installed new, corrosion-resistent USTs just prior to the adoption of regulations that had the potential to render the new USTs out of date.

Underground Storage Tanks (USTs)
This client came to us following the removal of two USTs and discovery of environmental impact adjacent to a historic barn on this commercial property, which was udner agreement for sale, pending site cleanup.

Phase 1 Environmental Site Assessment
Phase 1 Environmental Site Assessments were needed by a car wash company at 11 facilities within a limited time frame. AES discovered environmental risks at four sites, necessitating additional investigation to determine if these sites had environmental impact. A pending re-finance settlement for the company was hanging in the balance.

Site Characterization
Petroleum-impacted soil was excavated from a former underground storage tank (UST) field without adequate follow-up soil sampling. A new UST system was then installed into the same excavation and placed into operation. AES was subsequently retained to collect the appropriate samples around the existing UST system without damaging the new equipment.

Site Characterization
Leakage of a large quantity of unleaded gasoline from underground storage tanks (USTs) resulted in groundwater impact of significant lateral extent that migrated, parallel to local structural features in bedrock. Subsurface fractures, along which the gasoline migrated, were suspected and drilling of remediation wells into these fractures was recommended. Our challenge was to accurately map these fractures.

Site Characterization
During removal of three underground storage tanks (USTs), petroleum-impacted groundwater was encountered. AES coordinated and supervised the removal of the USTs and performed environmental sampling. Results revealed the presence of localized impact above state standards, necessitating further site characterization in the immediate vicinity of a new aboveground storage tank (AST) system and a creek, which borders the site.

Site Remediation
Unleaded gasoline leaked from underground piping causing extensive environmental impact by MTBE and BTEX. Our client planned a facility expansion and re-construction through the area of impact and expediated remediation was necessary.

Geologic and Hydrogeologic Consulting
AES was retained to evaluate the potential effect on local carbonate bedrock by proposed land development activities. AES performed a Carbonate Hazard Assessment (CHA) to determine the relative potential for development of karst features, such as sinkholes, from proposed modifications of surface water flow patterns at the site.

Asbestos and Indoor Air Quality
AES was retained to generate and implement an encapsulation/abatement plan of asbestos containing building materials (ACBNs) located within a circa-1920 senior housing apartment building. An asbestos building inspection had previously been performed; however, an AES inspection of the building revealed several suspect ACBMs previously not identified.

Environmental Compliance
A manufacturer of truck utility bodies contacted AES to perform a comprehensive assessment of their facility's air quality, hazardous and residual waste compliance issues. In addition, AES was petitioned to review their emergency response planning and procedures.

Waste Management, Pollution Prevention and Energy Efficiency (P2E2)
A heavy equipment manufacturer retained AES for environmental management services subsequent to a surprise audit by the PADEP.

Land Development - STORMWATER INFILTRATION CARBONATE TERRAIN
AES was hired to assist the prospective Buyer’s engineering firm to determine whether the onsite carbonate geology (limestone) would present undue obstacles for site development and to provide an evaluation and assurance that the design will comply with the local and federal regulations for stormwater infiltration management structures.

Land Development - STORMWATER INFILTRATION CARBONATE TERRAIN
AES was hired to assist the Developer’s engineering firm to determine whether the onsite carbonate geology (limestone) would present undue obstacles for site development and to provide an evaluation and assurance that the local and federal regulations for the proposed stormwater infiltration management structures could be appropriately attained.

Land Development - WASTEWATER DISPOSAL COMMUNITY DRIP IRRIGATION SYSTEMS
Our client plans to subdivide an approximately 193-acre rural site in southeast Pennsylvania into 104 lots for development as a residential subdivision. Water service will be provided by two onsite community water wells, with sewage service provided by a community sewer system consisting of a package treatment plant that discharges to an onsite community wastewater drip irrigation system.

Remediation - GASOLINE CONTAMINATED PROPERTY
Nine underground storage tanks (USTs) were removed from a gasoline and tire service station. Soil and groundwater contamination was identified requiring site characterization and remediation in accordance with the Pennsylvania environmental laws. Approximately 630 tons of impacted soil was excavated and subsequently thermally treated, followed by the installation of 14 on- and off-site groundwater monitoring wells. Separate-phase hydrocarbons (SPH) were present on the shallow groundwater table aquifer with “elevated” levels of dissolved-phase hydrocarbons being reported in the groundwater on and off-site.

Remediation - GASOLINE CONTAMINATED PROPERTY
AES removed underground storage tanks at a small retail gasoline and service station. Extensive soil contamination was identified during this removal requiring additional site characterization and remediation in accordance with Pennsylvania environmental laws. AES coordinated the excavation and disposal of approximately 950 tons of petroleum impacted soils from the site, followed by the installation of 22 on- and offsite groundwater monitoring wells. Separate-phase hydrocarbons were present on the shallow groundwater table aquifer with “elevated” levels of dissolved-phase hydrocarbons being reported in the groundwater downgradient of the site.

Remediation - GASOLINE CONTAMINATED PROPERTY
A hydrocarbon release from a gasoline station was discovered after petroleum vapors were reported in the basement of their commercial building. Following a preliminary site evaluation and the removal of three registered underground storage tanks/dispensers, AES conducted site characterization activities in accordance with Pennsylvania environmental laws. AES coordinated the collection of soil samples from strategic locations on-and off-site using GeoProbe Direct-push technology and oversaw the installation of groundwater monitoring wells by a Pennsylvania-licensed driller. Unleaded gasoline compounds were identified in soils around the former gasoline delivery line, and dissolved-phase unleaded gasoline compounds were reported at elevated concentrations in the groundwater beneath and downgradient of the site. In addition, separate-phase hydrocarbons were present on the groundwater table in the vicinity of the former tank field.

Remediation - GASOLINE CONTAMINATED PROPERTY
Following the removal of a registered underground storage tank and associated dispenser from the college campus, AES initiated site characterization activities, including soil and groundwater quality investigations in accordance with Pennsylvania environmental laws. AES coordinated the collection of soil samples from strategic locations on-site using GeoProbe Direct-push technology and oversaw the installation of 10 groundwater monitoring wells by a Pennsylvania-licensed driller. Unleaded gasoline compounds were identified in shallow soils in the vicinity of the former gasoline dispenser, and dissolved-phase unleaded gasoline compounds were reported at elevated concentrations in the groundwater beneath the site. Following site characterization activities, AES conducted remedial pilot testing, including an 18-hour pumping and vacuum test, at the site to determine the appropriate remedial technologies that could be used to address the petroleum-impacted soils and groundwater beneath the site.

Remediation - GASOLINE CONTAMINATED PROPERTY
When AES’ client experienced potential delays in the construction of its new facility due to on-site environmental issues, AES went to work to address a release of approximately 5,000 gallons of gasoline at a retail refueling station that occurred as a result of a faulty dispenser fitting. Construction contractors were on stand-by awaiting AES’ efforts to mitigate site conditions sufficient for construction to proceed. AES was given two months to effect soil cleanup, with groundwater remediation to follow, but not impede construction of the new facility. Complicating the situation was the prevention of adverse impact to a nearby public water supply well for the community; entry of gasoline and gasoline vapors into the adjacent sanitary sewer system; the underlying complex limestone bedrock.

Remediation - HEATING OIL CONTAMINATED PROPERTY
In the early 1990’s, a gasoline underground storage tank (UST) and a No. 2 heating oil UST were removed from this commercial laundry facility by another environmental consultant and over the next 10 years, a variety of consultants collected samples and recovered separate phase product (SPH) from the water table surface. However, none of the work efforts focused on closing out the project. That is until 2000 when AES was hired with just that goal in mind.