Environmental Services, Wilmington, MA

environmental-servicesTata & Howard has been providing environmental services for a Site in Wilmington, Massachusetts for several years. The contaminants of concern at the Site are chlorinated volatile organic compounds (CVOCs). The CVOCs were detected in June 1994 as part of a due diligence assessment for bank financing, and the sources of the CVOCs are from prior operations at the Site that utilized chlorinated solvents to clean electronic parts. These compounds were released to the environment through improper disposal and leakage from the equipment that was used onsite.

Remedial activities were performed at the Site to reduce the concentrations of CVOCs in soil and groundwater, and in August 2000, a Class C Temporary Solution Response Action Outcome (RAO) was filed with the Massachusetts Department of Environmental Protection (MassDEP), which concludes that there was no substantial hazard to human health, safety, public welfare, or the environment caused by the contamination at the premises. That conclusion is based on appropriate assessment, testing and analyses, and includes a Method 3 Risk Characterization, which supports those findings. In August 2005, and again in August 2010 and September 2015, the Class C RAO was renewed based on the conclusion that there was, as of the date of each renewal, no substantial hazard caused by the contamination at the premises.

In May 2015, T&H filed a Release Abatement Measure (RAM) Plan for the installation of a sub-slab depressurization system (SSDS) at the Site as part of a Permanent Solution in accordance with MassDEP’s regulations. Based on more recent data, six points and radon type fans were installed in an effort to develop a negative pressure field beneath the western portion of the building. T&H also installed a remote telemetry system equipped with an alarm that will notify MassDEP, Tata & Howard, and the owner of the building if the SSDSs fail as the result of loss of power, mechanical issues, or other disruption of the system.

The building is primarily comprised of office and commercial warehouse space, and an Activity and Use Limitation will be implemented as part of the Permanent Solution to prohibit more sensitive uses in the future, such as daycare or residential.

Environmental Remediation, Quincy, MA

WORK Inc., Environmental Remediation Services, Quincy, MA

WORKInc_demo_beforeWORK Inc. provides onsite training and employment for disabled individuals, most of whom have significant developmental or cognitive disabilities.  WORK Inc. is fully accredited by the Commission on Accreditation of Rehabilitation Facilities with its highest rating, and licensed by the MA Department of Developmental Services.  As a human services agency, WORK Inc. places a high premium on human health and safety.  It has a health and safety committee, with external members including an insurance risk manager, to ensure that the agency is engaging in safe practices with minimal, if any, risks to human health and the environment.

In 2008, WORK Inc. decided to relocate from 3 Arlington Street in Quincy, Massachusetts to Dorchester, Massachusetts because the buildings at the Quincy site were in extremely poor condition.  When a due diligence assessment was performed at the Quincy site, several contaminants, including chlorinated volatile organic compounds (CVOCs), arsenic, cadmium, lead, and nickel were detected in soil and groundwater.  The sources of these compounds were found to be a former foundry, machine shop, and plating facility that were located at the site well before WORK Inc. took ownership.  Because they did not cause the contamination, WORK Inc. was eligible for a Brownfields Grant from the USEPA to pay for the cleanup.  T&H assisted with the preparation of the grant application and a remedial grant of $200,000 was received by WORK Inc. – the first eligible party in the entire City of Quincy to receive such funds.

In November 2009, WORK Inc. moved to the Dorchester facility and the Quincy facility was razed in spring 2011 to allow for redevelopment and to give better access to the contaminated soil and groundwater.  The demolition project was coordinated by T&H, who provided field observation and coordination services.

Approximately 800 cubic yards of metals contaminated soil were excavated and disposed offsite.  During the excavation, T&H collected soil samples from the sidewalls and bottoms of the excavations for screening with a portable x-ray fluorescence (XRF) analyzer.  Soil samples from the periphery of the excavation were then sent for confirmatory analyses at a laboratory to verify that significant concentrations of metals do not remain in soil at the site.

To address the CVOCs, T&H coordinated the drilling of four membrane interface probes (MIPs) to gather continuous CVOC data that were used to further define the vertical and horizontal extent of contamination and soil stratification.  These data indicate that the highest response to CVOCs was an approximate ten foot zone of soil located just above the bedrock.  Based on the MIPs data, T&H observed the installation of deep groundwater monitoring wells that were constructed with short screen sections set on top of the bedrock.  T&H is currently implementing a pilot test to evaluate the effectiveness of enhanced bioremediation for the remediation of the CVOCs in groundwater.