HomeMy WebLinkAbout19- Task Order - Tetra Tech, Inc. - Bozeman Landfill 2019-20 Remediation Systems Operation and Maintenance i
TETRA TECH
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 5971 1-1 230 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 (Al) 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 All Systems O&M
Tetra Tech will conduct monthly monitoring and adjustment of individual SVE and Al wells. The
SVE and Al 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 Al wells
will need to be cleaned out every six months to maintain sediment-free well screens.
Task 300 Leach ate/Co nden sate 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
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 Oversight
Bozeman Landfill, Bozeman, Montana
February 28, 2019
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 $46,475
Flare System O&M
Task 200 SVE and Al Systems O&M $20,400
Task 300 Leac hate/Co nde n sate UST $29,194
Task 400 Database Entry and Management $14,280
Task 500 Pipeline Connection from Condensate UST to $5,080
Sanitary Sewer
Task 600 Project Management and Reporting $16,320
TOTAL $131,749
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TETRA TECH
Task Order—2019-2020 Remediation Systems Oversight
Bozeman Landfill, Bozeman, Montana
February 28, 2019
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 Bo man Tetra Tech /41
By: By.
77)0
Printed Name: Printed Name: Kirk A Miller
Its: (A,-h4N1�VL .� 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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TETRA TECH