HomeMy WebLinkAbout13- Task Order 10-8-13 Tetra Tech, Inc. Bozeman Sanitary Landfill for Soil Gas Study/Soil Gas Investigation and Mitigation Tasks �
TASK ORDER
SOIL GAS STUDY
Soil Gas Investigation and Mitigation Tasks
BOZEMAN SANITARY LANDFILL
October 8, 2O13
CLIENT: CONSULTANT:
The City of Bozeman Tetra Tech, Inc.
P.O. Box 1230 851 Bridger Dri_veSte 6
Bozeman, Montana 59711-1230 Helena, MT 59715
Attention: Mr. Dustin Johnson — Attention. Mr. Kirk Miller
SCOPE OF SERVICES:
Tetra Tech has been conducting an investigation of soil gas migration from the Story Mill landfill site since
early in 2013. This has been a relatively fluid project that has changed scope and direction on several
occasions an new data has come in. Tetra Tech submitted m Task Order on July 14, 2013 which
pn�eotodthe scope ofvvqdk and co�sthat were anticipated bobe necessary through August 2O1^3 That
scope of work has been completed and Tetra Tech has been requested byC|h/staff in conduct an'mber
of additional tasks, which are outlined in this proposal. Some of these hymka overlap with the scope of
work in the July 13, 2013` Task Order because additional work was required (e.g., ore uam~~'
house vweremeooaoer� higher co�«due tm expedited laboratory analysis, etr.). ' n/�s Per
This Task Order outlines the work anticipated to be necessary tuaccomplish the following:
=
Understand the nature and extent of indoor air and mubslab air quality in the 8ridgar Creek
Estates Phase 2 and Phase 3homes,
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Design and install soil gas mitigation systems within the 26 homes in the Phase 3neighborhnod
� ��onitormidgoUomayatemnoperation and indoor air quality in homes after mitigation systems have
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been installed.
• Provide Community Relations support as requested,
• Provide Project Management, including oversight nf scope schedule and budget.
TASK 10O—SOIL GAS INVESTIGATION
The residential soil gas investigation will consist of residential indoor air and ou&o|mb air sampling and
groundwater sampling of several irrigation wells. Tetra Tech will conduct submfab soil gas sampling
through the concrete slab in either the home or the attached garage of homes in the BddgerCneek
Subdivision Phase 3 and in four homes in phase 2. If possible, existing radon mitigation systems maybe
utilized to collect soil gas from beneath concrete slabs. This method of sampling will be conducted in
eounrdemwe with Montana Department of Environmental Quality (DE[3) Vapor Intrusion (V|) {Buydenoa
(August, 2011)and Tetra Tech's Indoor Air Quality Sampling and Analysis Plan Addendum (SAP).
Permanent aubs|ab, soil Qmo sampling ports (also referred to mo vapor pins) will be installed using a drill
with concrete drill biby. AflmL stainless steel, tamper proof cap will protect the vapor pin. Samples will be
collected with 6 liter GUK4K8,4 canisters and dedicated flow oontroKYeno. A helium shroud will be used
during the collection of all subslab samples in accordance with DEQ's V1 guidance and Tetra Teoh'aSAP Samp|eo will be shipped to Eurofnm AirToxica in Fn|uon. California, for a five-day turnaround laboratory ana|ys|s of 38 volatile organic compound (VOC) constituents by analytical method TO-15 Selective A~
'Mnde (S|8 ). Particulars of the investigation for the subdivision phases are described below.
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TETRA TECH OCTOBER 2013 TASK ORDER
Bddger Creek Subdivision, Phase 3
Contingent on homeowner cooperation, Tetra Tech will collect mn|m|mum of one nwbs|mbsample from
each residence in the Bridger Creek Subdivision, Phase 3. There are 2G homes in this Subdivision phase
and two homes under construction. Then*fore, a minimum of 28 vapor pins will be installed and samples
collected. One set of subslab samples for all of Phase 3 will have been collected by the end of September
3013. The sampling event during August and September, 2013. was pert of the City of Bozaman'n initial
response (o the soil gas issue.
Bridger Creek Subdivision, Phase 2
Also contingent on homeowner cooperation, Tetra Tech will conduct indoor air and subnlab sampling on
the east side of 8r|dger Creek Subd[vision, Phase 2 as an investigative method in determining the
westward extent of soil gas impacted with VOCo. This task order assumes that only 4G homes in Phase 2
will need to have two indoor air and one subslab sample collected. This sampling will occur two times with
a split sample collected during the second sampling event, which will be submitted to Pace Laboratory for
confirmation of results.
Private Well Sampling
In the course of conducting residential surveys and indoor air sampling, Tatra Tech has identified
residences that have private well for lawn and garden irrigation. With the owner's permission, water
quality samples will be collected to provide additional information as the extent and magnitude `of VOC
impacts to groundwater south of the |aod§8. Our task order assumes up to 28 private wells Will be identified by this program that will warrant sampling. Samples will be submitted to Pmom Analytical Laboratories in Billings, Montana, for analysis ofVDCo in accordance with the Environmental Pro~c1kzn Agenoy(EPA) WethodO28OBWBVLowLmvei
Indoor Air and Subn|ab Sampling Results Reporting
The focus of this investigation has been on individual homes; hmmoo' the reports prepared to date have
provided results on o home-by-home boeia, not a site-wide basis. Tetra Tech will compile the collected
data into a larger overview on a periodic basis. This will probably be driven by OE{] requests for updates
or reports. Tetra Tech will compile the results for all homes and summarize our findings into individual
letter reports for each homeowner. These letters will be produced for the indoor air samples,�theaubn|mb
samples, or a combination of the two data sets, depending upon when the data is collected (some homes
will have both sample types collected concurrently). The data will he compiled into a Microsoft Access
database mo that data tmb!mm can be produced to present any combination of data that needed
to
support a letter report, The letter reports will be submitted to the City for final review and distribution tnthe
homeowners.
Tetra Tech will attend homeowner meetings with City staff as requested to present the indoor air sample
veuu|1o, Individual homeowner meetings are not anticipated for the uubuUab sample results or for the
Phase 2 sampling program.
Tetra Tech will compile a summary report that presents the data up through the indoor air andoubn|ab
sampling portions of the program. The objective of this program will be to provide a larger scale analysis
of the distribution of VOCs in the subsurface and within homes,such that horizontal and vertical variability
ofVOCm concentrations can be analyzed. This report will be focused on presentation of data on
figures,gnspho, and in 1eb|en in an effort to elucidate trends, gradients, ratios, and other relationships that may be!p in the overall understanding of the source, mignat|on, and transport of the V[ Cs. This report may include data from the progress reports produced early in 2013 for the soil gas probe efforts, Tetra Tech
will prepare homeowner letters auneeded for the Phase 2homeowners.
TASK 2OU— MITIGATION
All Phase homes will undergo a review 1m evaluate whether they warrant mitigation to reduce VDC
concentrations inside the home. We have not included mitigation for any Phase 2 homes in this proposal,
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TETRA TECH OCTOBER 2D13TASK ORDER
since it is unknown whether that will be necessary. The mitigation design and implementation process will
entail the following steps:
• Identify radon mitigation contractors in the Bozeman area and conduct procurement prnomno�
o Obtain qualifications, experience, finish carpentry abilities, and crew size information and
short list interested contractors down tothree firms,
o Obtain bids from three abud ||mUed firms for ooKeo<ed homes to establish base rates for
single extraction point and crawl space typo systems (per square foot of coverage).
o Select mitigation contractor(s) and mocu/a subcontract agreement through Tetra Teoh'o
pre-qualification prwonoa (agreement to onn\naot terms' insurance coverage, adherence
to our health &nahyty plans, etc.)
• Evaluate multiple lines of evidence regarding conditions at each home, including:
• Review of indoor air and ombe|ab sample results,
• Comparison of results tm EPA Regional Screening Lewa|n (RSLs) and OEO 1 x 10'5 risk
levels,
o Soil gas probe data im the proximity mf the home, and
o Potential indoor sources for the observed VOCs.
• Make e determination as to whether vapor intrusion is occurring for each individual home at
concentrations in excess of EPA RSLsorOE[)'o 1 x 10-5 risk levels.
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Arrange for Peter Rich to visit each home and identify floor plan, building construction,
homeowner limitations, and other site oondidonsthat rniQb& influence mitigation system design,
This will entail two tn three trips to Bozeman to arrange for mU Phase 3 homes to be visited.
Phase 2 homes are not included in the scope of work since it has not been dmhamnimed that
mitigation systems will bo necessary in that neighborhood,
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Develop conceptual mitigation plans for each home that io determined to warrant mitigation (e.g,
aubn|ah depressurization typo systems) and review plans with homeowner to gain their
concurrence with the location of extraction point(n), piping rnuting. finishes on any new
construction within living spaces, and location of fans and outside vents, This plan will include the
location of vacuum monitoring points, which wlH be used to evaluate the vacuum created beneath
the slab. This will allow the system operation to be adjusted to provide an effective vacuum
barrier beneath the slab or to identify if an additional extraction point is needed.
• Tetra Tech will maintain m schedule of homes selected for mitigation and their mitigation system
status (initial site visit, design comp|ete, contractor xohndu|n. etc.). This will include the schedule
date for implementation, which may be adjusted to account for extenuating circumstances (io..
VOC levels, children,sick or elderly im home, home sales status, etm.).
• Prior to Implementation of the mitigation system at any home an Access Agreement (provided by
the City of Bozeman)will be signed by the homeowner, the City, and Tetra Tech. This agreement
will outline the construction anticipated to be conducted at each home and the subsequent
quen
access needed by the City to monitor and maintain the mitigation system,
• Subsequent tnstart-up of any mitigation system, Tetra Tech will conduct periodic monitoring of
system performance. The scope of this monitoring is outlined in the Monitoring Task of this
proposal (Task 3O0).
• After imstuUaUum and start-up of the mitigation system, a letter report will be prepared that
describes the system that was installed, the location of vacuum monitoring points, anticipated
monitoring mohedu|e, instructions on how to ubeoh system operation (typical manometer levels),
contact numbers for any problems and details on how 10 be reimbursed for electricity costs.
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TETRA TECH OCTOBER 2013 TASK ORDER
TASK 30U—AIR MONITORING FOR PHASE 3 M[UG/Tl[>N DESIGN AND PERFORMANCE
Air monitoring for mitigation design and performance wd| becVnductadintheBddgerCreekBubdivioion
,Phase 3. This task order does not consider mitigation activities for Bhdgar Creek Subdivision, Phase 2'hmwever.theymaybenecmasaryena |e(erdmte.
Thaaubs|ab depressurization systems (SBBa) will be monitored to confirm their effectiveness at lowering
VOC levels below identified clean-up levels. Air monitoring will be conducted following system installation
to evaluate the extent afvacuum created beneath the concrete slab. In this task mrdor, it is assumed that
aU26honmeaim Phase 3 and the �mhonnemunder oonotnuodoowiUrequire SD8s.��irt�sdn8 for radon will
also be conducted prior to system startup and following three months of operation as an indicator
constituent demonstrating effectiveness nf the SOS systems.
These activities are described below and assume continued cooperation of the homeowners allowing
entry by Tetra Tech personnel ho conduct the air monitoring.
Pme-Syst�ernInstallation Air Monitoring
Air monitoring prior to system installation will consist of air sampling for concentrations of radon in indoor
sir. Passive radon monitors mf0 be used in the |ovvoeX level of each home. One or two radon monitors will
bo placed in the lowest level of the home for o minimum nf two days testing,
Performance Air Monitoring
Air monitoring following system installation and startup will u000|nt of air flow, pressure, temperature, nd
vacuum measurements conducted with hand-held devices, In addition, radon testing would oonurin'each
home after two weeks of SOS operation, Vacuum and air flow monitoring will occur one week after
system start-up them onth|yfor three mmmthm, followed by 6-month intervals..
Follow-up (or post~nnKtigation) Indoor Air and GmbsiobSampling
Indoor air and eubm|eb sampling will be conducted in each home with a SOS approximately two weeks
after system operation to evaluate whether the 8DB is reducing VOCoonoentreUoom below clean-up
levels. The indoor air sample will be collected over a 24'hourdunaUom. The oubm|eb sample will be
ocd|nuted over minQ|o half-hour duration. Subu|ab samples will be uo||antad in the discharge of the SOS
in each home. In homes without on SOQ, indoor air and uubs|eb sampling will be conducted during
February 2014 as a follow-up monitoring event, Sampling in February was recommended by DEQ to
optimally evaluate V| when home heating systems are operational, homes are closed up and the ground
is frozen.
^
Each home will have one indoor air and one oubu8ab air sample collected, The indoor air sample will be
collected at the lowest level (basement) of the home. Therefore, this tank order assumes the uuUnoUun of
two air samples in each of the 28 homes/construction sites in BhdQnr Creek Phase 3 In addition, ten
percent of the sample train will consist of duplicate samples as specified in Tetra Tenh'u SAP Therefore
six additional samp;eo will he collected mmduplicates, '
The demonstration of no vapor intrusion occurrence using follow-up (post-SIDS startup) indoor air sample
naamlta may be problematic, Constituents such as benzene, eghylbenzeme, chloroform, and others may not have significantly decreased duo to the design of the homes (attached garages), individual chemical
usage, and lifestyles of the occupants generating in-home sources ofVDCm. However, it is anticipated(hut several VOC concentrations will ehmm significant decreases to demonstrate —ff-oUvemesm of iho SD8a.
TASK 480— DATA MANAGEMENT
This task will establish and maintain e database to support generation of data tables, maps, and (�|S
amm|yniaaoneadadthpoughuutOhapr�ooi ` '
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TETRA TECH OCTOBER 2O13 TASK ORDER
Data Management
All analytical data will betransferred into Microsoft Access database andfommattedh> auppmhi(e use in
the production of data tah|eo. G)|S and CAD based graphios, statistical ana|yaiu, or other forms of data
analysis and output. Data tables will be produced as needed to support homeowner letters and overall
site assessment reports. G|S and CAD production of figures will be driven by the needs of the various
reports.
Data Validation
Laboratory data for VOCo will undergo Stage 2A data validation to establish whether the collected data
meets data quality objectives established by the SAP. This pnmcouo will identify data that needs to be
flagged due 10 laboratory or field procedures not adhering to standards. This may affect how that data
point can be used in the assessment cf site conditions or the omIou(abmn of risk. These data flags will be
entered into the Aomouu database to ensure they are carried over into any data tables or other outputs
that are created,
TASK 500—COMMUNITY RELATIONS
Maintaining a positive working relationship with the homeowners affected by the project and the
community at large is cd0nm| to successful and cost effective completion of this project. Tetra Tech will
mnnint the City in this effort as requested, We anticipate this will entail the tasks described below,
Public Meetings
Tetra Tech assisted the City im the preparation and conduct nfa public meeting on August 27 3013 This
included preparation of a power point presentation, review of communication a1nategio`-' logistics,
preparation nf graphical oNdenand poster boards, and pa�icipetionin the meeUnQ. ^
We anticipate that during the period of time covered by the tasks included in this scope of work,~t wo
additional public meetings will be necessary to update the neighborhood on project developments. Ve
propose to assist the City in providing a similar scope of work as we provided for the August 27 1h meeting.
We recommend a modified format be used since many of the homeowners will have already sat through
one or two previous meetings and will be familiar with the background of the landfill and the nature of
vapor intrusion, Hence, our presentation will focus more on new deve|upmeoha, progress made, and
future actions. We also recommend a more open house format be used wherein the public can stop by at
any time during the evening and find Tetra Tech or City staff that can provide information or answer
specific questions. This allows the public to get their questions answered in a short period of time
''-`~~~
md having to sit through two hours of information that they have already heard during a previous meeting.
Communication Materials
Tetra Tech has developed draft Frequently Asked Questions (F4Qo) and Technical Update
i Booument�u`which need tobo refined and fiom8zod. Tetra Tech will work with City staff hz modify these documents o~
an ongoing basis as project conditions change or new issues are identified, In addition, Tetra Tech staff
w |l assist the City with media events, press releases, and the overall project communication plan, as
requested. This might include helping Flying Horse Communications prepare City staff and officials for
meetings with the Bozeman Chronicle Editorial Board, television interviews, homeowner meetings, and
response\o homeowner questions.
TASK 0Qn—PROJECT MANAGEMENT
Tetra Teoh'm management team is presented on the attached organization chart. Kirk Miller is the Project
Manager and Mark Pearson is the Assistant Project Manager. Technical leaders include Peter Rich for
Mitigation, Brian Howard for Risk Communicaiion, Brandy Moses for Public Communication, 1aMh
Pearson for Site Characterization, Lynn Peterson for Data �Wmnagementand Graphics, and Keith J`hnson
for Landfill Corrective Measures Assessment. Thetechnioe� leaders have Task Leaders that will '-ona8m
speui�ofield eRn�m, dal analysis, subcontractors, document production, and other ootivi0en. ''
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TETRA TECH OCTOBER 2013 TASK ORDER
Project Communication
Tetra Tech will use m variety of tools to provide appropriate levels of communication to City staff on the
progress of the pnojeoi, new dave|opmento, developing imsueo, budget status, and schedule. The primary
tools are outlined below.
Weekly updates
Kirk Miller will provide an email every Friday afternoon with a brief summary of the week's progress such
as samples collected, drilling oomp|eted, mitigation designs completed, lab results received, mitigation
systems in�aUed. etc. VVoenU�pateueimgap/eodnheetfommst000mmonioatedeto||ofmrso-ooftheom
items.VVe have included costs for this nubtaok for m six month period,
'�
Monthly pdates
Tetra leoh'smonthky invoice will include a written status report that identifies the following:
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Work completed during period
°
Work anticipated for the upcoming period
°
Problems identified and resolved
• Budget summary
• Schedule status
• Out ofScope tasks
vVe have included costs for this eubtauk for amN month period,
Schedule
Our anticipated timeline to complete these tasks is presented on the attached schedule. We have tried to
account for possible delays in work created by homeowner access |oQ{aUco. subcontractor availability,
DEQ comments or approvals, and other factors; however,they are still subject to change.
COMPENSATION: Estimated costs to complete the foregoing scope of services are not to
exceed $547.828. Attachment details these costs, The services will be conducted on a time
and materials basis.
SPECIAL CONDITIONS: Execution of this Task {}njer constitutes acceptance of all terms and
conditions contained in TetraTech'6 Professional Services Agreement with the CbvofBoz8[man
dated January 3, 1994 and Amendment Nos. 1' 2, J. and 4 of the Professional ��en/ioe`
Aor*8nleDtdated July 31, 1995; January 1. 1998; �Woroh 17. 1997; and ��8nen��r 1O 2DO~
respectively.
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CLIENT: CONSULTANT:
City of Bozeman Tetra Tech
By: By:
/uu |ta� Prolect Manager
Date: Date-
Page 6 ofG
Exhibit.B
ESTIMATED BUDGET
OCTOBER 2013 TASK ORDER
SOIL GAS INVESTIGATION AND MITIGATION
ROZEMAN SANITARY LANDFILL
TASK 100 SOIL GAS INVESTIGATION
Bridger Creek Subdivision Phase 3
Assume the installation of 26 soil vapor pins. Assume the collection of 29 substab samples(including three duplicates)
Labor UNITS RATE COST TASK TOTAL
Project Manager,per hour 24 $170.00 $4,080,00
Asst. Project Manager, per hour 48 $90.00 $4,320.00
Supervising Field Technician,per hour 140 $85r00 $11,900.00
Field Technician,per hour 140 $75.00 $10,500.00
Tetra Tech Equipment and Vehicle Rental
Drill and Related Equipment,per pin 28 $50.00 $1,400.00
Vehicle mileage 4,420 $0.60 $2,652.00
Direct Costs
Soil Gas Sampling Pins,each 28 $70.00 $1,960.00
Helium,per sampling event 1 $960,00 $960.00
Infrared USA Thermal Imaging Contractor,per day 5 $250.00 $1,250.00
Lodging and Per Diem,per day 14 $140.00 $1,960.00
Miscellaneous Sampling Materials,estimate 28 $30,00 $840.00
Tetra Tech Administrative Markup, 10% $697.00
Laboratory Costs
Rental of 6L SUMMA Canister,each 28 $55,00 $1,540.00
Rental of Flow Controller,each 28 $1500 $420.00
Modified TO-15 Analysis(VOCs),each 28 $140.00 $3,920.00
Modified TO-15 Analysis(APHs),each 28 $161.00 $4,508.00
Modified ASTM D-1946(Aliphatic Hydrocarbons),each 28 $86,00 $2,408.00
5-Day Turnaround Time,each 28 $58.00 $1,624,00
Shipping Laboratory to Tetra Tech Bozeman,per canister Included in canister cost
Shipping Tetra Tech Bozeman to Laboratory,per canister 28 $20.00 $560,00
Tetra Tech Administrative Markup, 10% $1,498,00
Phase 3 Subslab Sampling-Subtotal $58,997.00
Bridger Creek Subdivision Phase 2
Assume the installation of 4 soil vapor pins. Assume the collection of 24 indoor air samples and 12 subslab samples plus 16
split samples to a second laboratory=50 air samples,
Labor UNITS RATE COST TASK TOTAL
Project Manager, per hour 12 $170.00 $2,040.00
Asst.Project Manager, per hour 20 $90.00 $1,800.00
Supervising Field Technician,per hour 90 $85.00 $7,650 00
Field Technician, per hour 80 $65.00 $5,200.00
Tetra Tech Equipment and Vehicle Rental
Drill and Related Equipment,per pin 6 $115,00 $690m
Vehicle mileage 500 $0,60 $300.00
Direct Costs
Tetra Tech Page 1 of 6
Exhibit B
ESTIMATED BUDGET
OCTOBER 2013 TASK ORDER
SOIL GAS INVESTIGATION AND MITIGATION
BOZEMAN SANITARY LANDFILL
Sell Gas Sampling Pins,each 6 $70,00 $420.00
Helium,per sampling event 1 $960.00 $960.00
Lodging and Per Diem,per day 6 $140.00 $840.00
Miscellaneous Sampling Materials:,estimate 16 $3000 $480.00
Tetra Tech Administrative Markup, 10% $270.00
Laboratory Costs
Rental of 6L SUMMA Canister,each 50 $55,00 $2,750,00
Rental of Flow Controller,each 50 $15.00 $750.00
Modified TO-15 Analysis(VOCs),each 50 $140.00 $7,000.00
Modified TO-15 Analysis(APHs),each so $161.00 $8,050.00
Modified ASTM D-1946(Aliphatic Hydrocarbons),each 50 $86.00 $4,300.00
5-Day Turnaround Time,each 50 $58.00 $2,900.00
Shipping Laboratory to Tetra Tech Bozeman,per canister Included in canister cost
Shipping Tetra Tech Bozeman to Laboratory,per canister 50 $20.00 $1,000.00
Tetra Tech Administrative Markup, 10% $2,675.00
Phase 2 Substab&Indoor Air Sampling-Subtotal $50,075.00
Private Well Sampling
Assume 20 wells in Bridger Cr Phase 11 and ld Subdivisions,
Labor UNITS RATE COST TASK TOTAL
Project Manager,per hour 2 $170.00 $340,00
Asst, Project Manager,per hour 8 $90,00 $720.00
Supervising Field Technician,per hour 40 $85,00 $3,400,00
Tetra Tech Equipment and Vehicle Rental
Field Parameters Meter,per week 4 $15000 $600.00
Vehicle mileage 60 $0,60 $36.00
Laboratory Costs
Pace Analytical 524.2 or 8260(VOC)Analysis,each 22 $120.00 $2,640.00
Shipping Laboratory to Tetra Tech Bozeman,containers 1 $30.00 $30,00
Shipping Tetra Tech Bozeman to Laboratory,containers 4 $3000 $120.00
Tetra Tech Administrative Markup, 10% $279.00
Private Well Sampling-Subtotal $8,165.00
Indoor Air and Subsiab Sampling Results Reporting
UNITS RATE COST TASK TOTAL
Individual Letter Reports
Labor
Project Manager,per hour 30 $170.00 $5,100.00
Asst. Project Manager,per hour 8 $90,00 $720.00
CAD Technician,per hour 30 $75.00 $2,250.00
Administrative Assistant,per hour 6 $55.00 $330.00
Meetings with individual homeowners
Labor
Project Manager,per hour 16 $150.00 $2,40000
Asst. Project Manager,per hour 32 $90.00 $2,880.00
Tetra Tech
Page 2 of 6
Exhibit B
ESTIMATED BUDGET
OCTOBER 2013 TASK ORDER
SOIL GAS INVESTIGATION AND MITIGATION
BOZEMAN SANITARY LANDFILL
CAD Technician,per hour 0 $75.00 $0.00
Administrative Assistant,per hour 0 $55.00 $0.00
Summary reports
Labor
Project Manager,per hour 16 $150.00 $2,400.00
Asst. Project Manager,per hour 40 $90.00 $3,600.00
CAD Technician, per hour 24 $75.00 $1,800,00
Administrative Assistant, per hour 4 $55.00 $220,00
Indoor Air and Subsiab Sampling Results Reporting.SLibtotal $21J00.00
TASK 200 MITIGATION TASK 100 SOIL GAS INVESTIGATION TOTAL $138,937
Phase 3 Mitigation Pre-Design and Contractor Selection
Labor UNITS RATE COST TASK TOTAL
Proiect Manager,per hour 12 $170.00 $2,040.00
Asst.Project Manager,per hour 12 $90,00 $1,080.00
Mitigation Specialist,per hour 140 $262,00 $36,680.00
Construction Oversight,per hour so $95.00 $7,600.00
Tetra Tech Eguipment and Vehicle Rental
Vehicle,mileage 1,000 $0,60 $600,00
Rental Vehicle,per day 9 $70.00 $630,00
Direct Costs
Lodging and Per Diem 18 $140.00 $2,520,00
Airfare 3 $1,100.00 $3,300.00
Infrared USA,Thermal Imaging Contractor,per day 4 $250,00 $1,000.00
Miscellaneous Sampling Materials,estimate 26 $30,00 $780.00
Tetra Tech Administrative Markup,10% $760,00
Phase 3 Mitigation Pre-Design and Contractor Selection-Subtotal $56,990,00
Phase 3 Mitigation Installation and Oversight
Labor UNITS RATE COST TASK TOTAL
Project Manager,per hour 26 $170.00 $4,420.00
Asst.Project Manager,per hour 8 $90m $720.00
Mitigation Specialist,per hour 52 $262,00 $13,624.00
Construction Oversight,per hour WO $95,00 $34,200.00
Tetra Tech Equipment and Vehicle Rental
Vehicle, mileage 4,000 $0.60 $2,400.00
Field meters,per week 10 $100.00 $1'000,00
Direct Costs
Mitigation Contractor,per home 26 $4,500.00 $117,000.00
Lodging and Per Diem 32 $140.00 $4,480.00
Miscellaneous Materials,estimate 26 $50.00 $1,300.00
Tetra Tech Administrative Markup, 10% $12,278,00
Tetra Tech Page 3 of 6
Exhibit B
ESTIMATED BUDGET
OCTOBER 2013 TASK ORDER
SOIL GAS INVESTIGATION AND MITIGATION
BOZEMAN SANITARY LANDFILL
Phase 3 Mitigation Installation and Oversight-Subtotal $191,422,00
TASK 200 MITIGATION TOTAL $248,412.00
TASK 300 AIR MONITORING FOR PHASE 3 MITIGATION DESIGN AND PERFORMANCE
Phase 3 Pre-System Installation Air Monitoring
Monitoring for radon UNITS RATIE. COST TASK TOTAL.
Project Manager, per hour 3 $170.00 $510.00
Asst. Project Manager,per hour 8 $90.00 $720.00
Supervising Field Technician,per hour 40 $75.00 $3,000,00
Laboratory Costs
Radon Monitor,each 28 $15.00 $420.00
Tetra Tech Administrative Markup, 10% $42.00
Other Direct Costs
Lodging and Per Diem 4 $140,00 $560,00
Tetra Tech Administrative Markup, 10% $56,00
Phase 3 Pre-System Installation Air Monitoring-Subtotal $5,308.00
Phase 3 Performance Air Monitoring
Measurements of temperature,air fiow,pressurelvacuum conducted with hand-held devices
Project Manager,per hour 6 $150.00 $900,00
Asst. Project Manager,per hour 16 $90-00 $1,440,00
Supervising Field Technician,per hour 56 $55.00 $3,080,00
Tetra Tech Equipment and Vehicle Rental
Field Parameters Meters,per week 4 $200,00 $800.00
Vehicle,mileage 200 $0.60 $120.00
Phase 3 Performance Air Monitoring-Subtotal $6,340.00
Phase 3 Follow-up(or post-mitigation)Indoor Air and Subslab Sampling
Collection of one indoor air and one subslab sample per home+duplicates
UNITS RATE COST TASK TOTAL.
Labor
Project Manager,per hour 12 $170.00 $2,040.00
Asst,Project Manager,per hour 16 $90.00 $1,440.00
Supervising Field Technician,per hour 70 $85.00 $5,950.00
Field Technician,per hour 0 $75.00 $0,00
Tetra Tech Equipment and Vehicle Rental
Vehicle,mileage 580 $0.60 $348.00
Direct Costs
Helium,per sampling event 1 $960.00 $960.00
Lodging and Per Diem 8 $140.00 $1,120.00
Miscellaneous Sampling Materials,estimate 26 $30.00 $780.00
Tetra Tech Administrative Markup, 10% $286.00
Tetrp T,h Page 4 of 6
Exhibit B
ESTIMATED BUDGET
OCTOBER 2013 TASK ORDER
SOIL GAS INVESTIGATION AND MITIGATION
BOZEMAN SANITARY LANDFILL
Laboratory Costs
Rental of 6L SUMMA Canister,each 62 $55.00 $3,410,00
Rental of Flow Controller,each 62 $15.00 $930.00
Modified TO-15 Analysis(VOCs),each 62 $140.00 $8,680.00
Modified TO-15 Analysis(APRs),each 62 $161,00 $9,982.00
Modified ASTM D-1946(Aliphatic Hydrocarbons),each 62 $86.00 $5,332.00
5-Day Turnaround Time,each 62 $58.00 $3,596.00
Shipping Laboratory to Tetra Tech Bozeman,per canister Included in canister cost
Shipping Tetra Tech Bozeman to Laboratory,per canister 62 $20.00 $1,240.00
Tetra Tech Administrative Markup, 10% $3,317,00
Phase 3 Follow-up(or post-mitigation)Indoor Air and Subsiab Sampling-Subtotal $49,411.00
TASK 300 AIR MONITORING FOR PHASE 3 MITIGATION DESIGN AND PERFORMANCE §61,059,00
TASK 400 DATA MANAGEMENT
Data Entry and Database Management
Labor UNITS RATE �qQ_ST TASK TOTAL
Project Manager,per hour 16 $170.00 $2,720.00
Senior Hydrogeologist,per hour 8 $150.00 $1,200.00
Asst,Project Manager,per hour 16 $90.00 $1,440.00
Database Technician,per hour 120 $75.00 $9,000,00
Administrative Assistant,per hour 24 $55.00 $1,320.00
Data Validation
Labor
Project Manager,per hour 8 $150.00 $1,200.00
Environmental Chemist,per hour 120 $105.00 $12,600.00
Asst, Project Manager,per hour 16 $90.00 $1,440.00
Administrative Assistant,per hour 4 $55,00 $220.00
Data Entry and Database Management-Subtotal $31140.00
TASK 500 COMMUNITY RELATIONS TASK 400 DATA MANAGEMENT 111,140.00
Public Meetings and Communication Materials
Labor UNITS RATE COST TASK TOTAL
Project Manager, per hour 80 $170.00 $13,600.00
Asst. Project Manager,per hour 60 $90.00 $5,400.00
Editor,per hour 40 $95.00 $3,800,00
Administrative Assistant, per hour 32 $55 00 $1,760.00
Data Entry and Database Management Subtotal $24,560,00
TASK 500 COMMUNITY RELATIONS $24,§60.00
TASK 600 PROJECT MANAGEMENT
Weekly updates
Labor UNITS RATE COST TASK TOTAL
Project Manager,per hour 26 $170.00 $4,420,00
Asst.Project Manager, per hour 13 $90.00 $1,170.00
Administrative Assistant, per hour 6 $55,00 $330.00
Monthly updates
Tatra Tpr.h Page 5 of 6
Exhibit IS
ESTIMATED BUDGET
OCTOBER 2013 TASK ORDER
SOIL GAS INVESTIGATION AND MITIGATION
BOZEMAN SANITARY LANDFILL
Labor
Project Manager,per hour 24 $170.00 $4,080.00
Asst. Project Manager,per hour 30 $90.00 $2,700.00
Administrative Assistant, per hour 12 $55.00 $660.00
General Project Management
Labor
Project Manager,per hour 120 $170,00 $20,400.00
Asst.Project Manager,per hour 60 $90,00 $5,400.00
Administrative Assistant,per hour 32 $55,00 $1,760.00
Direct Costs
Lodging and Per Diem 20 $140.00 $2,800.00
Project Management-Subtotal $43,720.00
TASK 600 PROJECT MANAGEMENT JI3 720.00
TOTAL OF ALL ACTIVITIES $547,828.00 $547,828.00
Tetr- Page 6 of 6