HomeMy WebLinkAbout15- Task Order Tetra Tech for Miscellaneous Landfill TasksTask Order
Miscellaneous Landfill Tasks
Bozeman Landfill
Bozeman, Montana
January 26, 2015
CLIENT: CONSULTANT:
The City of Bozeman Tetra Tech, Inc.
P.O. Box 1230 851 Bridger Drive, Ste 6
Bozeman Montana 59711-1230 Bozeman, MT 59715
Attention: Mr. Rick Hixson, PE Attention: Mr. Larry Cawlfield PE
INTRODUCTION
As a result of data obtained during investigations performed for the Corrective Measures
Assessment (CMA), follow-on work tasks have been identified. This scope of work describes
those follow-on work tasks.
SCOPE OF WORK
This scope of work covers miscellaneous work tasks including the following:
1. Respond to comments in DEQ's letter dated December 8,2014.
2. Given a waste history for the landfill, run the LandGEM model and document results,
assumptions, limitations and data in a memo.
3. Coordinate and oversee pumping and leak testing of the leachate tank.
4. Coordinate and perform pumping and disposal of liquid from Landfill Gas wells.
5. Project management including progress meetings with the City.
Each of these tasks is described in the following paragraphs.
1. Responding to DEQ comments. Tetra Tech will prepare draft comments to address
comments in DEQ's letter dated December 8, 2014. These comments generally deal with
the efficacy of the selected remedy at other locations and a suggested backup plan in the
event that the selected remedy is not effective. We will rely on our experience at other
sites to respond to these questions but will also rely on projects by others, and general
references related to soil vapor extraction. We will provide one draft copy of a response
to the City and will incorporate comments from the City regarding the draft copy in a final
copy to be submitted to DEQ. When water quality information from the recently completed
monitoring well in the golf course is available to address Comment Number one in the
DEQ letter, Tetra Tech will incorporate that information into the memo or issue a separate
memo.
2. LandGEM modeling. Tetra Tech will obtain a history of landfill waste placement from
Greatwest and perform modeling with EPA's LandGEM model to estimate the history and
predicted future of gas and VOC emissions. Tetra Tech will present the results in a draft
memo to the City and will incorporate the City's comments on the draft memo into a final
version.
3. Leachate Tank Testing. Tetra Tech will perform testing of the existing leachate tank. To
do this, we will coordinate with City personnel that will pump the existing tank and transport
the leachate to the City's wastewater treatment plant. Then we will hire and coordinate a
specialized subcontractor to pressure test the tank. Results from the test will be presented
Task Order for Miscellaneous Tasks
Bozeman Landfill Remediation
January 29, 2015
Page 2 of 2
to the City in a draft memo. Tetra Tech will incorporate the City's comments on the draft
memo to produce a final memo.
4. Pumping of wells. Tetra Tech will insert a submersible pump into LFG wells holding liquid
and evacuate the liquid into a tank. Tetra Tech will perform this evacuation twice — once
as soon as possible and a second time about one month after the initial pump out. In
between, we will monitor accumulation in the wells. Results of the initial pump -out and
the secondary pump -out will be presented to the City in a draft memo. Recommendations
for long-term handling of accumulated water (if warranted) will be made. Tetra Tech will
incorporate the City's comments on the draft memo into a final version of the memo.
5. Project Management. Tetra Tech will attend meetings with the City during the coming
months to advise the City of progress on the tasks described herein and other landfill
related tasks. Tetra Tech will also produce monthly summaries of progress on this task
order and will communicate at many intermediate times using phone and email as
warranted.
Schedule
We will complete these tasks will be completed once authorization to proceed is received. Our
anticipated schedule to complete all the tasks is approximately 8 weeks after authorization.
COMPENSATION
Estimated costs to complete the foregoing scope of services are $39,798.00. A breakdown of these
proposed expenditures is contained in the attached cost estimate. The services will be conducted
on a time and materials basis as described in the Contract between the City and Tetra Tech.
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:
City of Bozeman
By: C�+�M/ - /T
Its: C[7�/ Mtin PC
Date:
CONSULTANT:
Tetra Tech
By:
Its: Project Manager
Date: January 29, 2015
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.
Estimated Costs for Miscellaneous Tasks related to Bozeman Landfill Investigation
January, 2015
No. of
Item Units Units Unit Cost Item Cost
Responding to DEQ comments
Landfill Engineer (Principal)
HR
24
$ 200.00
$
4,800.00
Landfill Engineer I
HR
12
$ 80.00
$
960.00
Senior Engineer
HR
18
$ 160.00
$
2,880.00
Subtotal
$
8,640.00
LancIGEM modeling
Landfill Engineer (Principal)
HR
12
$ 200.00
$
2,400.00
Senior Engineer
HR
4
$ 160.00
$
640.00
Subtotal
$
3,040.00
Leachate Tank Testing
Hydrogeologist
HR
12
$ 105.00
$
1,260.00
Senior Engineer
HR
1
$ 160.00
$
160.00
Subcontracted Tank Testing
LS
1
$ 1,500.00
$
1,500.00
Water Quality Testing and Analyses
EA
1
$ 800.00
$
800.00
Subtotal
$
3,720.00
LFG Pumping
Hydrogeologist
HR
72
$ 105.00
$
7,560.00
Equipment Rental
EA
2
$ 450.00
$
900.00
Shipping
EA
2
$ 200.00
$
400.00
Subtotal
$
8,860.00
Project Management
Project Director
HR
16
$ 175.00
$
2,800.00
Senior Engineer
HR
32
$ 160.00
$
5,120.00
Senior Engineer (Rich)
HR
16
$ 250.00
$
4,000.00
Subtotal
$11,920.00
Subtotal All Tasks $36,180.00
Contingency (10%) $ 3,618.00
Total $39,798.00