Town of Weston Limited Removal Action
Contents
This project involved a Limited Removal Action (LRA) for remedial actions undertaken by CommTank at the former library in the Town of Weston, Massachusetts. These remedial actions were initiated and completed under the provisions of a LRA which is outlined in the Massachusetts Contingency Plan (MCP) at 310 CMR 40.0318. The LRA was conducted following the removal of a 500-gallon single wall steel Aboveground Storage Tank (AST) containing No. 2 fuel oil.
Aboveground Storage Tank Removal
Sidewall of the rectangular oil tank shows metal corrosion
CommTank removed a 500-gallon aboveground storage tank containing No. 2 fuel oil located within a vault in the basement of this property. Based on oil stains found on the floor and vault walls a subsurface investigation consisting of five soil borings was conducted.
One soil sample was taken from a soil boring and submitted to ChemServe Environmental Analysts in Milford, New Hampshire, a state-certified analytical laboratory for extractable petroleum hydrocarbon (EPH) analysis. Headspace readings of Total Volatile Organic Vapor (TVOV) concentrations of 8.0 ppmv at depths of 0’-2’ and 4.0 ppmv from depths of 2’-4’ were recorded. CommTank received analytical results from the laboratory indicating that the soil from the depth of 0’-2’ had extractable petroleum hydrocarbon (EPH) compounds detected in concentrations that exceeded MADEP Reportable Concentrations for S-1 category soil (RCS-1). RCS-1 standards are applicable at residential properties in Massachusetts.
Contaminated Soil Excavation and Disposal
The removal of petroleum contaminated soil (PCS) performed at the former Weston library was completed under the provisions of a LRA. A total of 11 tons of PCS was excavated and transported under Bill of Lading (BOL) from the site to Environmental Soil Management, Inc. (ESMI) in Loudon, New Hampshire for disposal. Following the completion of the PCS excavation, post-remedial soil samples were collected from the remaining soil in the excavated area and analyzed for EPH. The analytical laboratory results indicated all contaminant concentrations were below applicable MCP RCS-1 standards.
Dan Hoag has worked in the environmental and tank storage industry for 16 years. Dan’s range of expertise includes designing systems for oil spill clean-ups, treating soil contamination through "in situ" oxidation and testing, and inspecting underground storage tank systems. As head of Marketing and Information Technologies at CommTank, Dan draws from field experience to write about fuel, water and chemical storage technologies, and the regulations that affect them. He has developed training courses in home inspection, underground storage tank operator, ultrasonic thickness and tank tightness testing. Over the past decade, Dan has published over 60 articles about industry trends and has documented commercial, residential, and environmental projects through illustration, videos, and photography. When Dan unplugs from technology, he spends his time backyard farming, hiking, and kayaking, while masquerading as a hockey player during the wee hours of the morning.