Removal and Replacement of Underground Storage Tanks
CAPACCIO provided engineering and site assessment services to this client for the removal and replacement of several underground storage tanks (USTs) at its central heating plant (CHP). This project included delineating soil and groundwater contamination, generating site/civil design plans for the removal and replacement, and developing a soil disposal protocol for live loading of contaminated soils.
CAPACCIO prepared site/civil engineering design plans for the removal of three (two 20,000-gallon single-walled and one 15,000-gallon) fuel oil USTs with the replacement with two 12,000-gallon double-walled USTs.
CAPACCIO prepared a Health and Safety Plan (HASP) in accordance with U.S. Occupational Safety & Health Administration (OSHA) regulations and Massachusetts Department of Environmental Protection (MassDEP) requirements. The HASP was utilized by CAPACCIO personnel and subcontractors and available for reference while conducting the subsurface investigation work at the property.
CAPACCIO provided oversight of the removal of the USTs to ensure compliance with the design plans and provided soil field screening and sampling in accordance with the applicable MassDEP regulations and guidance. Visual observations and soil screening with a Photo ionization detector (PID) was utilized in accordance with MassDEP guidance to determine if there was evidence of oil and/or hazardous material release that is reportable to the MassDEP.
CAPACCIO prepared a UST Closure Report for submittal to the MassDEP and the Department of Public Safety including field observations and screening data, laboratory analytical data, and disposal documentation.
The university, in coordination with the Division of Capital Asset Management and Maintenance (DCAMM), demolished the campus gymnasium building for the construction of a new wellness center. In order to adequately plan for environmental conditions that may be encountered during construction activities, the university requested that CAPACCIO collect groundwater and soil samples and prepare a plan describing the appropriate practices to be used for management of soil and groundwater during construction.
One area of planned construction indicated hydrocarbon impact from former fuel oil USTs. This required notification to the MassDEP with response actions being conducted under the MCP as IRAs. CAPACCIO conducted soil and groundwater sampling to delineate the horizontal and vertical extent of the liquid- and soluble-phase hydrocarbon impact and confirmed that migration of the hydrocarbons had not impacted adjacent surface water. Additionally, a new electrical bank and utility vault were recently installed through the hydrocarbon-impacted area. These utilities are being monitored to ensure that there is no risk of off-site migration through this preferential pathway.
CAPACCIO worked in tandem with DCAMM’s environmental contractor to evaluate subsurface conditions in the footprint of the new wellness center during construction to maintain compliance with MCP requirements. Data obtained by CAPACCIO and DCAMM’s environmental contractor was used to complete the required Phase reporting under the MCP. The project is currently in Phase III of the MCP.
Phase I, Soil Sampling
CAPACCIO was contracted to conduct subsurface evaluations of environmental conditions in several planned areas of construction for new university buildings. CAPACCIO completed extensive soil sampling throughout these areas and identified the presence of elevated concentrations of arsenic. Based on a review of historical local and regional data, it was determined that the concentrations were consistent with naturally-occurring regional conditions. Therefore, the impacted soil was exempt from reporting to the MassDEP under the MCP and the data was used to coordinate soil disposal with a “like” facility to reduce costs associated with disposal of this soil as hazardous waste.
RAM, Soil Gas Sampling (on going)
A portion of the university’s new wellness center footprint is being constructed in an area of hydrocarbon impact. In accordance with MassDEP policy, CAPACCIO conducted soil-gas sampling to determine the potential for impact to indoor air at the new facility. CAPACCIO compared the data to MassDEP-established threshold values and presented the client with an evaluation of the potential risk for the migration of hydrocarbon compounds to indoor air. Based on this information, DCAMM determined that removal of the hydrocarbon-impacted soil during construction activities under Release Abatement Measure activities would provide the most effective risk management to occupants of the wellness center. Additionally, as a precautionary measure, a vapor barrier will be installed beneath the new facility.