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 Services and Dam Inspection in MA

Larkin Lumber DamIn November 2015, Tata & Howard provided peer review on work that had been completed at a former lumber mill, and all documentation that had been prepared to date was reviewed. The primary concern was an area where pressure treated lumber had been stored, as the lumber was treated with chromated copper arsenate and the residual arsenic concentrations in soil were very high. The previous recommendation was to put a deed restriction (specifically, an Activity and Use Limitation or AUL) on the area to limit the exposure. Because the planned future use for the property is to convert the existing mill building into residential condominiums, this approach was inadequate. In an effort to find a more suitable solution, T&H obtained and analyzed additional soil samples from this area and found that less than 200 cubic yards had been affected. The contaminated soil can be removed for under $30,000 and will bring residual concentrations below that allowed for residential use.

Because the mill is located on a brook, a filing with the local Conservation Commission was required.  T&H suggested that, due to the limited work being done and the fact that the affected area is separated from the brook by a retaining wall, an Abbreviated Notice of Intent (ANOI) would be sufficient. The Conservation Commission agreed, and the ANOI was approved at a Public Hearing. T&H is currently in the process of preparing a Release Abatement Measure (RAM) Plan, which must be submitted to the MassDEP prior to excavation.

During the first onsite project meeting, T&H noticed a dam located in front of the mill building which the client acknowledged was out of compliance and would likely result in financial penalties. T&H contacted the Department of Conservation and Recreation (DCR) and requested an extension for the completion of the dam inspection, assuring DCR that the inspection would be completed in a timely manner.  DCR agreed to waive the penalties, and the inspection report was completed in January 2016.

UST Removal in Massachusetts

UST removalTata & Howard provided environmental services to a private client relating to the removal of three fuel oil underground storage tanks (USTs) in Massachusetts. The project included observation of excavation activities associated with the removal of the USTs, collection of soil samples in accordance with the Massachusetts Department of Environmental Protection’s (MassDEP’s) UST Closure Assessment Manual, and screening for total organic vapors (TOVs) with a photoionization detector (PID).  We then prepared a summary letter, which included a summary of activities performed, and conclusions and recommendations with regard to Massachusetts General Laws c. 21E and the Massachusetts Contingency Plan.

CHALLENGE: Lead contaminated soil at site in Franklin, MA

FranklinMA_275Beaver_soil stabilizeCLIENT: Private client in Franklin, Massachusetts

PROJECT: Brownfield remediation

THE CHALLENGE: The Town of Franklin, MA planned to develop a site to be used by the Parks & Recreation Department. However, several potential environmental concerns were identified at the site.

THE SOLUTION: Based on information provided by the Town, Tata & Howard performed subsurface evaluation services to assess the potential presence of oil and hazardous material in soil and groundwater at the site, including the following:

  • Evaluated the site and found contaminated fill material under the building;
  • Evaluated the significance of our findings with respect to Massachusetts General Law c.21E and the Massachusetts Contingency Plan 310 CMR 40.0000; and
  • Prepared a Subsurface Evaluation Report for the site, which included a summary of activities performed, site figures and data tables, and conclusions and recommendations.

T&H then coordinated the removal of the lead contaminated soil, which contained hundreds of battery casings. The soil was treated onsite to stabilize the leachable lead, then transported to the Turnkey Landfill in Rochester, NH for disposal.

PROGRESS: Since it has been remediated and the Brownfield is now a Greenfield, the Town has purchased the site and begun renovating for future use as an indoor recreation facility. T&H filed a Permanent Solution report with the Massachusetts Department of Environmental Protection (MassDEP) in October 2015.

CHALLENGE: Water Storage Tank Painting, Cleaning in Residential Setting

Chester Street 0.5 million gallon water storage tank in Worcester, MA

CLIENT: City of Worcester, Massachusetts

PROJECT: Chester Street 0.5 million gallon water storage tank painting, cleaning, and rehabilitation

THE CHALLENGE: The Chester Street water storage tank required evaluation, repair, cleaning, and painting of both the interior and the exterior. The tank is located in a heavily populated residential neighborhood and the exterior surface had high levels of lead in the paint. Therefore, special attention to lead contamination, noise, and construction debris was required. In addition, determination of the effects of taking the tank offline were required before any work could be started.

THE SOLUTION:  Analysis of the Super High Service Area using the verified hydraulic model was conducted, and the model was run under extended period simulation (EPS) to evaluate the potential pressure problems within the service area. As a result, operational modifications to the existing pump stations and service zones were recommended. Working only during daylight hours while keeping noise and debris to a bare minimum, construction crews completed miscellaneous repairs including replacing the anchor bolts, installation of overflow support brackets, modification of the access ladder, modification of the roof ladder, repair of the upper level sway rod, extension of the balcony handrail, installation of a roof handrail, and replacement of the roof finial vent. During the exterior abrasive cleaning, a containment system was utilized to prevent lead from getting into the air and soil. Once all repairs and cleaning were completed, the interior and exterior of the elevated tank were painted.

PROGRESS: Two years later, the tank is still in pristine condition, as shown in the photo above.

CHALLENGE: Prioritizing Water System Improvements with Limited Resources, Mountainaire, AZ

Mountainaire mapCLIENT: Ponderosa Utility Corporation, Arizona

PROJECT: Mountainaire asset management based water distribution system study to assist with prioritizing water system improvements

THE CHALLENGE: Mountainaire is a small water distribution system with limited manpower and revenue resources, and the operation and maintenance of the system is often reactive rather than proactive.

THE SOLUTION:
We successfully helped secure WIFA funding for the completion of the study which provides guidance to the PUC on how the system operates, what improvements are needed for efficient operation and continued maintenance of the system, and a prioritized approach to assist in funding and implementation of projects. This asset management based water distribution system study addresses undersized deteriorating water mains, above grade assets, and the energy efficiency of the pumping system. The study evaluates the system as a whole, based on above grade and below grade assets. Above grade assets are evaluated based on remaining useful life expectancy. Water mains are based on hydraulic capacity, criticality, and risk of failure. A hydraulic model was created for the study.

PROGRESS: Using the findings of the study, we are currently providing engineering services to evaluate flow and pressure requirements for the existing Kiowa Site booster pump station in order to construct a constant pressure pumping system to replace the existing booster pump and hydropnematic tank system that is old and failing.

CHALLENGE: VOC Mitigation, Framingham, MA

ssds mitigation fan and manometer
Close up of completed SSDS mitigation fan and manometer.

CLIENT: Former Commercial Dry Cleaner, Framingham, MA

PROJECT: Remediation of chlorinated solvents from former dry cleaning operations

THE CHALLENGE: At this former wholesale dry cleaner, the client spent over $250,000 installing an asphaltic barrier and new floor over the barrier in an effort to prevent volatile organic compound (VOC) vapors from affecting indoor air quality.  This system was recommended by a prior consultant who subsequently found that the barrier did not sufficiently reduce the vapors in the indoor air to make the building safe for reuse.

THE SOLUTION:  T&H recommended sub slab depressurization systems (SSDSs), which are similar to radon systems, to redirect the vapors from beneath the building to the atmosphere.  The cost of four SSDSs was $10,000 and the VOCs in the indoor air were reduced to negligible concentrations. T&H then assisted the client as an expert witness to recover costs from the prior consultant and their installation contractor.

PROGRESS: Site closed out and the property has been sold.

Hazardous Waste Services, Newton Centre, MA

Newton Centre soil gas plot dueling dry cleanersTata & Howard has completed a variety of hazardous waste services for a private client in Newton Centre, MA. Work included completion of the Immediate Response Action (IRA) Completion Report and Response Action Outcome (RAO) as well as obtaining indoor air samples and submitting the results to the Department of Environmental Protection (DEP) every two years. Tata & Howard also prepared and submitted Post Class-C RAO Status Reports. This involves documenting the operational status of the sub-slab depressurization systems (SSDSs) and obtaining and analyzing groundwater from three key wells to evaluate whether conditions have changed. The Status Reports are required every six months.

In addition, Tata & Howard completed the installation of a telemetry system, preparation of an Activity and Use Limitation (AUL), preparation of a Permanent Solution with Conditions (PSC) report, annual inspection of the sub slab depressurization systems (SSDSs), and the replacement of a monitoring well cover. The work included updating the existing SSDSs in accordance with anticipated revisions to the MCP by adding an alarm system designed by Tata & Howard equipped with remote telemetry able to notify the the consultant, clients, tenants, and MassDEP in the event of a system failure. The work also included a metes and bounds land survey.

Tata & Howard also performed work to comply with the revised Massachusetts Contingency Plan (MCP) and developing the data necessary to support a Permanent Solution for the release of chlorinated solvents at the Site. The work included the installation of five additional soil gas monitoring points at the Site and the collection of the data. These points were required to collect additional soil gas data to evaluate whether vapor migration has been controlled. The samples were submitted for laboratory analyses. Also, Tata & Howard collected groundwater samples from seven key monitoring wells using low flow sampling. The groundwater from the wells were measured for pH, temperature, dissolved oxygen (DO), oxidation-reduction potential (ORP), specific conductance, and turbidity. This project is ongoing.

Massachusetts Contingency Plan (MCP) Assessment, Franklin, MA

IMG_2590Tata & Howard performed a Massachusetts Contingency Plan (MCP) Assessment in Franklin, Massachusetts. The assessment included passive soil gas sampling at the Site and abutting properties to identify possible sources of chlorinated volatile organic compounds and further evaluate the approximate horizontal extent of these compounds. We then evaluated the laboratory data to identify potential additional source areas and estimated the extent of contaminants detected by the passive soil gas samples. In addition, we created plume maps for each of the contaminants that were detected, and provided a summary and opinion letter with recommendations.

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.