UST Removal in Melrose, MA

UST-removalTata & Howard assisted the City of Melrose, MA with the removal of two underground storage tanks (USTs). Tata & Howard engaged the services of a qualified environmental contractor to excavate, remove, and dispose of an out-of-use UST on City property. During the excavation, a team member from our environmental services group observed a second fill pipe indicating the potential presence of a second UST. Upon further investigation, a second undocumented UST was found and the decision to remove both at the same time was made. Tata & Howard team members observed the UST removal activities, submitted confirmatory soil samples for laboratory analyses, prepared the MassDEP UST removal forms and submitted the forms to MassDEP and the Melrose Fire Department within 30 days of the UST removals. Tata & Howard also prepared a summary letter report for the site, which includes a summary of activities performed and conclusions and recommendations with regard to Massachusetts General Law c. 21E and the Massachusetts Contingency Plan.

 

 

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Dam Inspection, Hopkinton, MA — Milford Water Company

Echo Lake Dam, Hopkinton, MA
Echo Lake Dam, Hopkinton, MA

Milford Water Company retained Tata & Howard to perform a visual inspection and prepare a report of conditions for Echo Lake Dam and appurtenant structures.  Echo Lake Dam is  located at the head of the Charles River in Hopkinton, Massachusetts, and serves to impound water to create Echo Lake, a public water supply reservoir for the Town of Milford, operated by the Milford Water Company.

The dam measures approximately 198 feet in length with a structural height of 41 feet and a hydraulic height of 30 feet from the 24-inch outlet pipe to spillway crest.  The dam was built in 1898, raised 10 feet with stone masonry in 1901, and raised 2.5 feet with stop planks in 1987.  The dam is classified as large and high hazard potential.

The Phase I Inspection / Evaluation Report was  performed in accordance with MGL Chapter 253, Sections 44-50 of the Massachusetts General Laws. The purpose of the investigation was to inspect and evaluate the present condition of the dam and appurtenant structures to provide information that will assist in both prioritizing dam repair needs and planning/conducting maintenance and operation.

The investigation was divided into four parts: 1) obtain and review available reports, investigations, and data previously submitted to the owner pertaining to the dam and appurtenant structures; 2) perform a visual inspection of the site; 3) evaluate the status of an emergency action plan for the site and; 4) prepare and submit a final report presenting the evaluation of the structure, including recommendations and remedial actions, and opinion of probable costs.

The inspection was completed in April of 2015.

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.

DEEP Dam Inspections in Connecticut

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Butterworth Dam

Tata & Howard’s Waterbury, CT office completed forty (40) dam inspections and reports for the Department of Energy and Environmental Protection (DEEP) for dams located in the Western District of Connecticut, including fifteen flood control dams. The dams were rated from a hazard classification of ‘C’ to ‘BB’, and were located in urban environments, suburban locations, and rural settings. The construction of the dams varied from earthen embankments to mortared stone masonry to concrete to roller compacted concrete. The spillways varied as well, including ogee spillways, broad crested weirs, intake risers, and a drop inlet structure.

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Bunnells Pond Dam

Each report included a description of the dam, inspection checklists, photographs, a sketch of the dam identifying the major features and showing the photo locations, an aerial photograph and location plan, and recommendations for improvements.

T&H staff also provided the DEEP with a cost estimate for the recommended repairs and maintenance at the 23 non-flood control dams, including contingencies for engineering services, permitting, and construction administration support services.

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