HomeMy WebLinkAboutAmendment to Professional Services Agreement with Tetra Tech for four groundwater monitoring wells1
Commission Memorandum
REPORT TO: Honorable Mayor and City Commission
FROM: Dustin Johnson, Project Engineer
Debbie Arkell, Director of Public Services
SUBJECT: Amendment to Professional Services Agreement with Tetra Tech Inc. for
Installation of four additional groundwater monitoring wells.
MEETING DATE: February 27, 2012
AGENDA ITEM TYPE: Consent
RECOMMENDATION: Authorize City Manager to sign the Amendment to Professional Services
Agreement with Tetra Tech Inc. for installation of four additional groundwater monitoring wells for
the amount not to exceed $27,782.
BACKGROUND: The City of Bozeman has been required by the Montana Department of
Environmental Quality (DEQ) to sample and monitor the environmental effects of the Story Mill
Landfill since 1994. Tetra Tech (previously Maxim Technologies) has been contracted with the City
to assist in the work from the beginning. The nature of the contract has been to assist the City of
Bozeman in sampling, maintaining, and monitoring post closure parameters at the Story Mill
Landfill to keep the landfill in compliance with State and Federal regulations.
The landfill utilizes several ground water monitoring wells that have been strategically placed around
the landfill and surrounding property to determine if the landfill impacts the underground aquifer.
DEQ has questioned whether the existing wells provide adequate monitoring information. To
provide answer to those questions, they required a work plan proposing where additional monitoring
wells would be located.
The DEQ agreed that the attached work plan would adequately address their concerns. The work
plan calls for the installation of four additional wells. Two shallow depth wells would be installed in
areas of the landfill where monitoring isn’t currently taking place. One well would be 60 feet deep
and located north of the shop building. One well would be 70 feet deep and located near an existing
gas probe (BLG-10) along the southern boundary of the landfill.
Two deep depth wells would be installed near existing monitoring wells. One well would be 100
feet deep and located near the northeast corner of the shop building. One well would be 100 feet
deep next to the southern boundary of the landfill property. The monitoring of these four new wells
will provide information on whether contaminants from the landfill are entering the aquifer.
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UNRESOLVED ISSUES: None.
ALTERNATIVES: As suggested by the City Commission.
FISCAL EFFECTS: With the drilling of the wells, project management, reporting, and data
analysis, the total cost of this task order is $27,782. The entire project will be funded through the
Solid Waste Landfill Closure/Post-Closure Fund. This fund is required by the DEQ to be maintained
to ensure there are adequate funds for closure/post-closure activities required at landfills. There is
currently $1,613,076.53 in this fund.
Attachments: Tetra Tech Task Order/Proposal
DEQ correspondence approving the proposed work plan
Report compiled on: February 9, 2012
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