HomeMy WebLinkAbout18- Task Order - Tetra Tech, Inc. - 2018-2019 Remediation Systems Oversight at the Bozeman Landfill TETRA TECH
TASK ORDER
2018-2019 REMEDIATION SYSTEMS OVERSIGHT
BOZEMAN LANDFILL
June 15, 2018
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. Rick Hixson Attention: Mr. Mark F. Pearson
INTRODUCTION
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 when approved, will replace Task Order 2017-2018 Remediation Systems Oversight.
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 for treatment at the City of Bozeman Water Reclamation Facility.
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
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 Al Systems
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.
Tetra Tech
851 Br idger• Drive, Suite 6; Bozeman, 1`l F 59715
Tel 406.582.8780 Fax 406.582.8790 tetratech.com
Task Order—2018-2019 Remediation Systems Oversight
Bozeman Landfill, Bozeman, Montana
June 15, 2018
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
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. In
addition, to prevent corrosion and leaks developing in the UST, cathodic protection will be
installed by a subcontractor. An inspection of the cathodic protection system will also be
conducted on an annual basis.
Task 400. Database EntrV 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. 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;
administration/invoicing; and task order preparation for 2019-2020 system oversight activities.
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 the time it is approved by City of Bozeman until May
2019. Estimated costs to complete the foregoing scope of services are shown below:
ESTIMATED COSTS
TASK ORDER -2018-2019 REMEDIATION SYSTEMS OVERSIGHT
BOZEMAN LANDFILL
Task Description Estimated Cost
Task 100. LFG Extraction System, Leachate Pumps, and Flare System $55,080
Task 200. SVE and Al Systems $20,320
Task 300. Leachate/Condensate UST $38,838
Task400. Data Management $15,120
Task 500. Project Management and Reporting $22,320
TOTAL $151,678
The services conducted and invoicing will be on a time and materials basis. A detailed cost
estimate can be provided upon request.
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TETRA TECH
Task Order—2018-2019 Remediation Systems Oversight
Bozeman Landfill, Bozeman, Montana
June 15, 2018
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:
Printe Name: Printed Name: Mark F. Pearson
Its: 41�� G/T% A1�I� Its: Project Hydrogeologist
Date: 7-/6-2 Date: June 15, 2018
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