HomeMy WebLinkAbout10-07-19 City Commission Packet Materials - C10. TO with Tetra Tech for Remediation Systems Operation at Bozeman Landfill
Commission Memorandum
REPORT TO: Honorable Mayor and City Commission
FROM: Shawn Kohtz, City Engineer
SUBJECT: Task Order Fiscal Year 2020 Remediation Systems Operations and Maintenance, Bozeman Landfill
AGENDA ITEM TYPE: Consent
MEETING DATE: October 7, 2019
RECOMMENDATION: Authorize the City Manager to execute the attached Task Order for
fiscal year 2020 Remediation Systems Oversight, Bozeman Landfill.
BACKGROUND: The purpose of this task order is to allow Tetra Tech to continue oversight of operation, monitoring, and maintenance of the remediation systems at the Bozeman Landfill.
This task order modifies the period of services to match the City’s fiscal year rather than
previous calendar year task orders and will have an effective date of July 1, 2019 through June
30, 2020. This task order, when approved, will replace Task Order 2018-2019 Remediation Systems Oversight. This task order will be implemented under the professional services agreement referenced here: http://weblink.bozeman.net/WebLink8/0/doc/63070/Electronic.aspx.
UNRESOLVED ISSUES: None.
FISCAL EFFECTS: The cost of this work will be $131,749.00. This work will be paid for with solid waste funds.
ALTERNATIVES: As suggested by the City Commission.
Attachments: Task Order 2019 - 2020 Remediation Systems Operations and Maintenance, Bozeman Landfill (2 originals)
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Tetra Tech
851 Bridger Drive, Suite 6; Bozeman, MT 59715
Tel 406.582.8780 Fax 406.582.8790 tetratech.com
TASK ORDER
2019-2020 REMEDIATION SYSTEMS OPERATION AND MAINTENANCE
BOZEMAN LANDFILL
February 28, 2019
CLIENT: CONSULTANT:
The City of Bozeman Tetra Tech, Inc. P.O. Box 1230 851 Bridger Drive, Ste 6 Bozeman, Montana 59711-1230 Bozeman, MT 59718
Attention: Mr. Shawn Kohtz, PE Attention: Mr. Kirk Miller
INTRODUCTION
The purpose of this task order is to conduct the oversight of operation and maintenance (O&M)
of the remediation systems at the Bozeman Landfill.
In August 2016 the new remediation system began operation. The system consists of a landfill
gas (LFG) extraction system, pumps installed in selected LFG wells to remove leachate, a soil vapor extraction (SVE) system, and an air injection (AI) system. LFG and SV are burned in an
enclosed flare system that includes two regenerative blowers, air compressor, and instrumentation. In addition, leachate and LFG condensate is collected in a 4,000-gallon underground storage tank that is regularly emptied and the liquid discharged into the City of
Bozeman municipal sewer.
SCOPE OF WORK
Tetra Tech’s proposed scope of work is summarized in the following tasks:
Task 100 LFG Extraction System, Leachate Pumps, and Flare System O&M Tetra Tech will conduct monthly monitoring and adjustment of individual LFG extraction wells,
leachate pumps, and flare/compressor system. In addition, there will be regular service events
for the flare/compressor system. These service events will consist of inspection of the compressor and compressor filter replacement, flare components inspection and testing, blower
re-greasing, and related activities.
Task 200 SVE and AI Systems O&M
Tetra Tech will conduct monthly monitoring and adjustment of individual SVE and AI wells. The
SVE and AI wellheads (within the bolt-down steel manhole covers) will be visually inspected every six months to ensure air-tight fittings and valves. It is anticipated that some of the AI wells
will need to be cleaned out every six months to maintain sediment-free well screens. Task 300 Leachate/Condensate UST
Tetra Tech will conduct monitoring of liquid levels in the UST, calculate volume and accumulation rates, and conduct sampling of the liquid in the UST in accordance with City of
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Task Order – 2019-2020 Remediation Systems Oversight Bozeman Landfill, Bozeman, Montana
February 28, 2019
Page 2 of 3
TETRA TECH
Bozeman Water Reclamation Facility (WRF) requirements. Tetra Tech will also supervise the pumping and discharge of the leachate and condensate into City of Bozeman sanitary sewer. An inspection of the newly installed cathodic protection system will be conducted on an annual
basis.
Task 400 Database Entry and Management
Information collected during monitoring and adjustment activities will be placed into a project database. This database will be maintained and updated following every monitoring event
described in Tasks 100 and 200. The database will be used to evaluate operations and
effectiveness of the systems.
Task 500 Pipeline Connection from Condensate UST to Sanitary Sewer Tetra Tech will conduct a brief analysis of the feasibility of removing the Condensate UST and installing a direct piping connection to the City of Bozeman Sanitary Sewer. The annual costs
incurred by our Task 300 (as well as the liquid hauling contractor that bills the City directly) could be dramatically reduced or eliminated by a direct connection to the sewer. This connection would likely be similar to what is currently used for the new lined cell. The lined cell
has a discharge to the sanitary sewer in the southwest corner of the landfill property, which would be a logical place for the unlined cell condensate discharge point. This task will entail an evaluation of the permitting process this new connection would require, a conceptual design and
preliminary cost estimate. Our findings will be submitted to the City for review. Task 600 Project Management and Reporting
Project management will include, scheduling of personnel, monitoring equipment/meters, and activities; communication with City of Bozeman and DEQ; data management; and invoicing.
Reporting will consist of a brief summary of system operation and monitoring provided to City of
Bozeman on a monthly basis.
PERIOD OF PERFORMANCE AND COSTS
This task order will be applicable from July 1, 2019 through June 30, 2020. Estimated costs to
complete the scope of work are shown below:
TASK Estimated Costs
Task 100 LFG Extraction System, Leachate Pumps, and Flare System O&M
$46,475
Task 200 SVE and AI Systems O&M
$20,400
Task 300 Leachate/Condensate UST $29,194
Task 400 Database Entry and Management $14,280
Task 500 Pipeline Connection from Condensate UST to
Sanitary Sewer
$5,080
Task 600 Project Management and Reporting $16,320
TOTAL $131,749
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Task Order – 2019-2020 Remediation Systems Oversight Bozeman Landfill, Bozeman, Montana
February 28, 2019
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TETRA TECH
Our costs will be invoiced on a time and materials basis. A detailed cost estimate can be provided upon request.
SPECIAL CONDITIONS: Execution of this Task Order constitutes acceptance of all terms and
conditions contained in Tetra Tech’s Professional Services Agreement with the City of Bozeman,
dated April 15, 2014.
CLIENT: CONSULTANT: City of Bozeman Tetra Tech
By: By:
Printed Name: Printed Name: Kirk A Miller
Its: Its: Senior Project Manager
Date: Date: September 25, 2019
NOTICE OF CONFIDENTIALITY This Task Order (including attachments) contains information confidential to Tetra
Tech, Inc., its subsidiaries, and subcontractors. It is intended only for City of Bozeman to consider Tetra Tech
providing professional services at the Bozeman Landfill. Any other use is prohibited, without the prior written consent
of Tetra Tech.
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