Resolution 2025-090Resolution No. 2025-90
A RESOLUTION OF THE UNITED CITY OF YORKVILLE, KENDALL COUNTY,
ILLINOIS APPROVING A CONTRACT WITH TERRACON CONSULTANTS, INC.,
FOR BROWNFIELD REMEDIATION WORK IN DOWNTOWN YORKVILLE
WHEREAS, the United City of Yorkville (the "City") is a duly organized and validly
existing non home -rule municipality created in accordance with the Constitution of the State of
Illinois of 1970 and the laws of the State; and
WHEREAS, the City's Code of Ordinances provides that the City may approve contracts
in excess of $25,000 that have not been competitively bid by a two-thirds affirmative vote of the
City Council; and
WHEREAS, a parking lot owned by the City, a parcel owned by Build For Tomorrow
LLC, and a former service station and farm supply depot owned by the City, all located at East
Van Emmon Street and Bridge Street (the "Subject Property"), have been designated brownfield
properties by the Illinois Environmental Protection Agency ("IEPA"), requiring certain
remediation action at the Subject Property; and
WHEREAS, the City plans to utilize the Subject Property as a mixed -use recreation and
event space in the future, and therefore desires to complete remediation on the Subject Property
and obtain a no-further-remediation (NFR) letter from IEPA; and
WHEREAS, Terracon Consultants, Inc. ("Terracon") has provided a Proposal for
Environmental Services (the "Quote") to the City to complete a brownfield engineering study and
conduct work toward receiving a remediation plan from IEPA for the Subject Property, in an
amount not to exceed $86,780.00 for the study and planned work, with a possible $2,100 in
additional fees if an existing monitoring well on the Subject Property is no longer functioning; and
WHEREAS, creation of an IEPA approved brownfield remediation plan is a necessary
Resolution. No. 2025-90
Page ]
step in the remediation process required to receive a no-further-remediation letter from IEPA, and
City staff therefore recommend approval of Terracon's Quote; and
WHEREAS, the Mayor and City Council have determined that it is in the best interests of
the health and safety of the City and its residents to waive the competitive bidding requirement
and to authorize and approve the proposal by Terracon, in a total amount not to exceed $88,880,
in accordance with the provisions of the Quote.
NOW, THEREFORE, BE IT RESOLVED by the Mayor and City Council of the United
City of Yorkville, Kendall County, Illinois:
Section 1. The foregoing recitals are hereby incorporated in this Resolution as the
findings of the Corporate Authorities.
Section 2. The Corporate Authorities hereby waive the competitive bidding
requirement pursuant to the City's Code of Ordinances, and approve the Proposal for
Environmental Services by Terracon Consultants, Inc. in an amount not to exceed $88,880.
Section 3. That this resolution shall be in full force and effect from and after its
passage and approval according to law.
Passed by the City Council of the United City of Yorkville, Kendall County, Illinois this
12" day of August, A.D. 2025.
KEN KOCH AYE
ARDEN JOE PLOCHER AYE
CHRIS FUNKHOUSER AYE
RUSTY CORNEILS ABSENT
d
VTY CLERK
DAN TRANSIER ABSENT
CRAIG SOLING AYE
MATT MAREK AYE
RUSTY HYETT AYE
Resolution No. 2025-90
Page 2
APPROVED by me, as Mayor
this �� day of
of the United City of Yorkville, Kendall County, Illinois
A.D. 2025.
Resolution No. 2025-90
Page 3
Wrerracon
July 11, 2025
United City of Yorkville
651 Prairie Pointe Drive
Yorkville, Illinois 60560
Attn: Mr. Bart Olson
P: (630) 553-8537
E: bolsonpyourkville.il.us
192 Exchange Blvd.
Glendale Heights, IL 60139
P (630) 717-4263
F (630) 357-9469
Terracon.com
Re: Proposal for Environmental Services
Site Remediation Program Activities
Former Grainco FS, Kendall County Farm Bureau, and City Parking Lot
IL Route 47 and East Van Emmon Street
Yorkville, Kendall County, Illinois
Terracon Proposal No.: P11257066
Dear Mr. Olson:
Terracon Consultants, Inc. (Terracon) is pleased to submit this proposal to the United City of Yorkville
(City, Client) to provide environmental services at the above -referenced site (the site) to facilitate
obtaining a Comprehensive No Further Remediation (NFR) letter from the Illinois Environmental
Protection Agency (IEPA) Site Remediation Program (SRP). The following sections provide
background on the site and Terracon's scope of services, compensation, and schedule. If we have
misunderstood an aspect of the work, please let us know as soon as possible so we can evaluate our
scope and make necessary adjustments.
1.0 BACKGROUND
The site is located west of Illinois Route 47 between East Hydraulic Avenue and East Van Emmon
Street in Yorkville, Kendall County, Illinois. The site that is proposed for redevelopment is comprised
of a parking lot owned by the City, a parcel owned by Build For Tomorrow LLC, formerly the Kendall
County Farm Bureau, and a former service station and farm supply depot formerly owned by Grainco
FS and now owned by the City. Historical usage of the Grainco FS portion of the site included a
lumberyard, feed mill, equipment repair services, fertilizer supply, animal feed supply, and a distributor
of kerosene, oil, gasoline, and diesel fuel to local farmers through approximately 2004. The Kendall
County Farm Bureau building historically has been utilized as a cold storage facility, slaughterhouse,
meat processing facility, and a food pantry. The City parking lot was undeveloped land through
approximately 2000, when it was first developed as a paved parking area.
Proposal for Environmental Services rerraCon
Former Grainco FS, Kendall County Farm Bureau, and City Parking Lot a:i Yorkville, Illinois
July 11, 2025 r+ Terracon Proposal No. P11257066
The site was originally enrolled in the SRP in November 2005. Civil & Environmental Consultants, Inc.
(CEC) submitted a Phase I Environmental Site Assessment and an Initial Phase II Site Investigation
report to IEPA, which summarized site investigation activities they conducted in May and June 2005.
Additional investigation activities were completed from April through August 2007, which were
summarized in a Comprehensive Site Investigation Report (CSIR) that CEC submitted to the IEPA in
October 2007. The IEPA approved the CSIR in a letter dated February 27, 2008. in October 2012,
because no additional activities or reporting had occurred since 2007/2008, Terracon reached out to
IEPA to re -open the project. In response, IEPA requested a work plan to update site conditions.
Terracon submitted a Site investigation Update Work Plan to IEPA in December 2012, which was
approved by IEPA in a letter dated December 19, 2012. In April 2013, Terracon completed the scope
proposed in the Site investigation Update Work Plan including a test pit excavation to investigate a
suspect fill pipe for the potential presence of a UST, advancing five soil borings to update site soil
conditions, and sampling of groundwater from the existing monitoring wells. Based on a review of the
IEPA's Document Explorer, the results from the 2013 site investigation activities were never submitted
to the IEPA, and no further correspondence occurred besides notices to terminate SRP and intent to
remain in the SRP letters.
Terracon understands that the City intends to re -develop the site as a mixed -use
recreational/commercial area with a bandshell, plaza space, event lawn, seating area, and associated
parking lots. To that end, Terracon prepared and submitted to IEPA a Comprehensive Site Investigation
Work Plan (CSIWP), dated April 3, 2025. The objective of the CSIWP was to update site subsurface
condition data (as required by the SRP Project Manager) and move the site towards the goal of a
Comprehensive NFR letter for residential land use in accordance with 35 Illinois Administrative Code
(IAC) Part 740. The IEPA conditionally approved the CSIWP on April 22, 2025. Our services will include
preparing a combined report that includes a Comprehensive Site Investigation Report (CSIR), a
Remediation Objectives Report (ROR), and Remedial Action Plan (RAP). An outline of the requested
scope of services, budget, and schedule are provided below. A Remedial Action Completion Report
will be required following remediation activities and is not included in this scope of work at this time as
the remedial solution has yet to be defined.
2.0 SCOPE OF SERVICES
Utility Clearance
No later than 48 hours prior to intrusive activities, Terracon's drilling contractor will contact the local
one -call public utility locating service (i.e., JULIE) to arrange for public underground utility locates at
the site. Please note that the public utility locator only locates public utilities. Terracon is not responsible
for damages related to improperly marked utilities or to private utilities for which information is not
provided. Client is responsible for providing location information on any known private utilities on site.
Terracon will mark the proposed boring locations at the site and conduct a private utility locate to clear
the proposed locations.
Explore with us
Proposal for Environmental Services Werracon
Former Grainco FS, Kendall County Farm Bureau, and City Parking Lot " Yorkville, Illinois
July 11, 2025 Li Terracon Proposal No. P11257066
Health & Safety Plan
Terracon is committed to the safety of all its employees. As such, and in accordance with our Incident
and Injury Free' safety goals, Terracon will utilize/update the existing site safety plan for our personnel
during field services. Prior to commencement of on -site activities, Terracon will hold a brief health and
safety meeting to review health and safety needs for this specific project. At this time, we anticipate
performing fieldwork in a United States Environmental Protection Agency (USEPA) Level D work
uniform consisting of hard hats, safety glasses, protective gloves, and steel -toed boots. It may become
necessary to upgrade this level of protection, at additional cost, during sampling activities in the event
that we encounter petroleum or chemical constituents in soils or groundwater that present an increased
risk for personal exposure.
Site Access and Special Safety Considerations
Client shall secure all necessary site related approvals, permits, licenses, and consents necessary to
commence and complete the Services and will execute any necessary site access
agreement. Consultant will be responsible for supervision and site safety measures for its own
employees but shall not be responsible for the supervision or health and safety precautions for any
third parties, including Client's contractors, subcontractors, or other parties present at the site. In
addition, Consultant retains the right to stop work without penalty at any time Consultant believes it is
in the best interests of Consultant's employees or subcontractors to do so. Client agrees it will respond
quickly to all requests for information made by Consultant related to Consultant's pre -task planning
and risk assessment processes.
SRP Services
The scope of work that will be conducted was presented in the 2025 CSIWP that was conditionally
approved by the IEPA. In addition, the IEPA requested two additional soil borings, in their review letter,
to be advanced for additional characterization of subsurface conditions at the site. Adequately
characterizing subsurface conditions at the site is required to meet IEPA investigatory requirements, to
define site -specific properties, such as the appropriate groundwater classification (Class I or Class II),
groundwater flow direction, hydraulic gradient, and organic carbon fraction (fogy). The secondary task will
be to develop site -specific Tier 2 soil and groundwater remediation objectives (ROs) for the site, as
appropriate. It must be noted that this step may not be able to be completed if the initial phase of
investigation does not fully delineate the impacts, as the size and distributions of the impacts directly
affect the calculations. Per 35 IAC Section 742.300, a full delineation is required prior to developing ROs.
The development of site -specific ROs will reduce the need for physical soil and groundwater remediation,
if applicable; however, remedial work may still be required to demonstrate compliance with the ROs.
Soil Sampling
Eleven (11) borings (to be identified as B-101 through B-111) will be advanced utilizing a direct -push
Geoprobe° rig to an estimated maximum depth of up to 10 feet below ground surface (bgs), or boring
refusal, whichever is encountered first, in the approximate locations shown on the attached Exhibit 1.
The boring depths may vary based on obstructions and field -interpreted depth of groundwater. Soil
samples will be collected continuously and will be field -screened with a PID. Soil vapors in each soil
boring will be measured using a lower explosive limit (LEL) meter upon drilling.
Explore with us 3
Proposal for Environmental Services rerraeon
Former Grainco FS, Kendall County Farm Bureau, and City Parking Lot Pg Yorkville, Illinois
July 11, 2025 r Terracon Proposal No. P11257066
Up to three samples will be collected from each boring and preserved in the field for potential laboratory
analysis. At each boring, one soil sample will be obtained from surficial soils (approximately 0 to 3 feet
bgs), one sample will be selected at the discretion of the field professional based on field observations,
and one soil sample will be collected from near the termination depth of the boring. For budget
purposes we have estimated that two samples per boring will need to be analyzed to define the extent
of impact. If actual site conditions require additional analysis, or borings/sampling to define the extent
of impact, we will notify you and request a change order to cover those services.
The soil samples collected for laboratory analysis will be placed into laboratory -supplied glassware on
ice in a cooler for analysis. Eleven soil samples will be analyzed for the target compound list (TCL) of
parameters required by the IEPA to obtain a Comprehensive NFR letter in accordance with 35 IAC
Part 740 Appendix A. The remaining soil samples will be analyzed for VOCs, PNAs, RCRA metals,
and pH using appropriate USEPA Methods. To allow for potential pathway exclusion, Terracon will
collect one waste characterization soil sample, which includes laboratory analysis for cyanide/sulfide
reactivity, polychlorinated biphenyls (PCBs), Toxicity Characteristic Leaching Procedure (TCLP) RCRA
metals, paint filter, flash point, and total phenols, as well as up to three samples for total petroleum
hydrocarbons (TPH). To further evaluate the soil component to groundwater pathway, we have
budgeted to analyze up to 5 select samples, with metals over background (as appropriate), to be further
analyzed with TCLP and/or Synthetic Precipitation Leaching Procedure (SPLP). Soil samples to be
analyzed for VOCs. will be field -preserved using Method 5035 laboratory -provided sampling kits. The
samples will be transferred to Terracon's subcontract laboratory under chain -of -custody procedures.
Analytical laboratory procedures will be performed by a National Environmental Laboratory
Accreditation Program (NELAP)-accredited laboratory.
Up to two soil samples will be analyzed for fo,, to be used in developing site -specific ROs. The site -
specific fog will be calculated by multiplying the percent organic matter results by 0.58 as required by
the IEPA. The fogy samples will be collected from non -impacted areas, if identified, and will be analyzed
for VOCs, semi -volatile organic compounds (SVOCs), and TPH to confirm the lack of organic
contamination.
Following completion of the sampling, the soil borings will be backfilled with cuttings (reverse order of
the collection) and bentonite (as needed). The ground surface at each boring location will be finished
with similar materials (i.e. soil, concrete, asphalt) to match the surrounding ground surface. Sampling
equipment will be decontaminated before beginning the investigation and between each sampling point
using a non -phosphate soap wash followed by a potable water rinse.
Groundwater Investigation
Upon completion of the soil sampling activities, three 2-inch diameter and one 1-inch diameter
monitoring wells (designated MW-8 through MW-10, and MW-11, respectively) will be installed in the
approximate locations depicted on Exhibit 1. An attempt will be made to repair existing monitoring well
MW-1; if it can't be repaired, then it will be abandoned and replaced with a 2-inch diameter monitoring
well, installed to approximately 15 feet bgs or refusal (a contingency cost is included in the
Compensation section of this proposal, in the event that the monitoring well needs to be replaced).
Explore with us 4
Proposal for Environmental Services Terracon
Former Grainco FS, Kendall County Farm Bureau, and City Parking Lot ip Yorkville, Illinois
July 11, 2025 no Terracon Proposal No. P11257066
At least three business days after installation of the wells, Terracon will return to the site and develop
the wells by purging a minimum of three well volumes from each well (or purging until dry), prior to
collecting a sample for analysis. The samples for analysis will be collected using low -flow groundwater
sampling techniques. The groundwater samples will not be field filtered. Samples will be placed into
laboratory -supplied glassware, placed on ice in a cooler, and submitted for analysis, by USEPA
methods. The five groundwater samples will be analyzed for TCL parameters. The soil cuttings from
the installation of the 2-inch diameter monitoring wells and purge water from the monitoring wells will
be containerized in 55-gallon drums. The disposal cost for ten 55-gallon drums (nine soil and one
groundwater, assuming non -hazardous waste characterization) are included in this proposal.
The relative elevation of each monitoring well will be measured in the field, using standard surveying
equipment to the nearest 1/100th of a foot. This information will be used to generate a potentiometric
surface map depicting the groundwater flow direction and contours. Slug tests will be performed in two
of the 2-inch diameter monitoring wells using a pressure transducer and a data logger, to properly
classify groundwater at the site. Terracon will evaluate the hydraulic conductivity of the saturated soils
at the remediation site using slug test data obtained from the monitoring wells. The slug test data will
be evaluated using the Bouwer-Rice method to estimate the site in -situ hydraulic conductivity.
Based on subsurface information from the previous investigation activities, it appears that groundwater
recovery may necessitate multiple mobilizations to the site to collect groundwater samples as recovery
rates may be slow. An additional return trip to the site has been budgeted for groundwater sampling,
monitoring well surveys, and slug tests. In the event that groundwater recovery is not possible from a
practical standpoint, options will be discussed with the Client.
Soil Gas Sampling
Three soil gas points (SG-1 through SG-3) will be installed under Terracon supervision using a
Geoprobe® direct -push drill rig. Note that the locations of SG-1 and SG-2 are on a property that is
within the remediation site boundary but not owned by the Client; as previously discussed with the
Client, it is assumed that the Client will get access to the site from the property owner so Terracon can
install these two soil gas points.
The soil gas points will be constructed with a 6-inch-long stainless -steel screen. For each soil gas point,
the screen will be attached to rigid Teflon® tubing and placed at approximately 4 feet bgs. The annular
space around the screen will be backfilled with coarse silica sand (extending to at least 1 foot above
the screen), and then a granular bentonite seal will be installed to near the ground surface. The
bentonite seal will be hydrated from the surface in lifts during installation. The screen and sand pack
will be installed so that the soil gas sample is collected from a depth of at least 3 feet bgs and above
the saturated zone (if possible). Also, in accordance with the IEPA soil gas sampling protocol, no soil
gas samples will be collected within 48 hours after a rainfall event of/z inch or greater, or in standing
or ponded water areas.
The soil gas points will be leak tested before collecting the soil gas sample. A stainless -steel shroud
will be placed over the surface of each sampling location and pressurized with laboratory -grade helium
Explore with us 5
Proposal for Environmental Services rerracon
Former Grainco FS, Kendall County Farm Bureau, and City Parking Lot hr Yorkville, Illinois
July 11. 2025 m Terracon Proposal No. P11257066
to evaluate the integrity of the seal of the sampling point. During shroud pressurization, a helium
detector will be connected to the sample tubing to evaluate the concentration of helium at the soil gas
point.
Subsequent to successful leak detection testing, each soil gas point will be purged with a PID. The
tubing will be purged of at least three volumes prior to the collection of the soil gas sample. The soil
gas points will also be evaluated using an LEL meter to assess whether elevated LEL readings are
detected in the soil gas point. After purging, the soil gas sample will be collected using laboratory -
provided, batch -certified vacuum -equipped 1-liter Summa canisters with pre -calibrated 200 milliliters
per minute regulators. The soil gas samples will be analyzed for VOCs using USEPA Method TO-15
at a NELAP-certified laboratory.
Laboratory Analytical Program
The samples collected during the comprehensive site investigation will be submitted to the analytical
laboratory under standard chain -of -custody procedures for standard turnaround time (TAT) of
approximately 5 to 7 business days.
Analysis
Sample 'type
Method
TCL"
Soil
Various
Water
VOCs, BTEXIMTBE
Soil
USEPA SW-846 Method 8260
Water
PNAs
Soil
USEPA SW-846 Method 8270
Water
RCRA 8 Metals
Soil
USEPA SW-846 Method 6020/7471
Water
pH
Soil
USEPA SW-846 Method 9045D
TPH
Soil
USEPA SW-846 Method 8015
TCLP RCRA metal
Soil
USEPA SW-846 Method 1311
SPLP RCRA metal
Soii
USEPA SW-846 Method 1312
Reactivity (Cyanide and Sulfide)
Soil
SW 7.3.3.2 and SW 7.3.4.2
PCBs
Soil
USEPA SW-846 Method 8082
Waste Characterization—
Soil
USEPA SW-846 Various Methods
Explore with us 6
Proposal for Environmental Services �erraeon
Former G4nco FS, Kendall County Farm Bureau, and City Parking Lot 8 Yorkville, tllinois
July 11, 2025 m Terracon Proposal No. P11257066
Analysis
Sample Type
{Method
foc (along with VOCs/SVOCs)
Soil
USEPA SW-846 Method 9060
VOCs
Soil Gas
TO-15
* IEPA Target Compound List (TCL) includes VOCs, SVOCs, pesticides and aroclors organic anaiytes, and
inorganic analytes.
"' Waste characterization parameters typically required by landfills in Illinois include, but are not limited to, pH,
paint filter, PCBs, reactive sulfide, reactive cyanide, total phenolics, flash point, TCLP organics, TCLP RCRA 8
metals, TCLP herbicides/pesticides, and F-code solvents.
Sampling equipment will be cleaned before beginning the investigation and between each sampling
point using a non -phosphate soap wash followed by a potable water rinse. Soil and groundwater
samples will be placed into laboratory -provided glassware on ice in a cooler and submitted to a NELAP-
accredited laboratory for chemical analyses,
Site -Specific Evaluation
Terracon will classify the site groundwater as Class I or Class 11 Groundwater using the IEPA's flow
chart (35 1AC Part 620) combined with a Source Water Assessment Protocol (SWAP) well survey.
Terracon will compare the analytical data to the applicable Tier 1 ROs,
If necessary, Terracon will then develop Tier 2 site -specific ROs for the site. If the ROs calculated for
the site are greater than the analytical results, Terracon will prepare a combined CSIR, Remediation
Objectives Report (ROR), and Remedial Action Plan (RAP) for the site. The CSIR/ROR/RAP report
will be in suitable format for submission to the SRP. The combined report will be submitted to the IEPA
along with a DRM-2 form (Request to Review Technical Reports Form). In addition, a revised DRM-1
form, as requested by the IEPA in their recent review letter, will be included with the CSIR/ROR/RAP
to update the Remediation Applicant's (City's) address. If site conditions identified during the proposed
investigation activities exceed the calculated ROs, we will contact you to discuss additional remedial
options, if necessary. During the evaluation, proper institutional controls and engineered barriers will
be considered. Depending on the results from the CSIR and ROR, RAP and future site development
plan, potential site cleanup activities and the Remedial Action Completion Report (RACR) effort will be
established and included in a future proposal. Please note that a RACR must be completed and
submitted to the IEPA demonstrating completion of the RAP before the NFR letter will be issued.
Completion of the RACR is not included in this proposa.
If the site data collected indicates that additional site characterization is required before the evaluation
can be completed, Terracon will inform the client and submit a supplemental proposal to complete the
needed work.
3.0 COMPENSATION
Terracon proposes to complete the required scope of work as described herein on a lump sum basis
and includes Terracon professional labor costs, travel and direct client expenses required to complete
Explore with us 7
Proposal for Environmental Services �erraeon
Former Grainco FS, Kendall County Farm Bureau, and City Parking Lot ea Yorkville, Illinois
July 11, 2025 w Terracon Proposal No. P11257066
this scope of work using the project assumptions described herein. A summary breakdown of proposed
project costs is provided below:
TOTAL PROJECT COST
Soil Investigation, Monitoring Well and Soil Gas Point Installation (includes labor,
driller, private utility locate, analytical laboratory, field equipment, travel, and
$53,600
expenses)
Groundwater Investigation/Surveying/Slug Testing (includes labor, analytical
$17,680
laboratory, surveyor, field equipment, travel, and expenses)
Reporting (includes SRP Enrollment and Application, FSIR/ROR/f2AP)
$15,500
TOTAL FOR THIS PROPOSAL
$86,780
(IEPA SRP REVIEW RELATED FEES ARE EXCLUDED)
PROJECT CONTINGENCY
CONTINGENCY FEE TO REPLACE MONITORING WELL MW-1 IF IT CANNOT
BE REPAIRED (WILL ONLY BE BILLED WITH PRIOR AUTHORIZATION FROM
$2,100
THE CLIENT)
The IEPA's SRP program is a pay for review program. Quarterly invoices will be submitted by the IEPA
to the Remediation Applicant (Client) for the review services provided by the IEPA. Based on our
previous experience, we suggest that you budget $7,500 — $10,000 for IEPA review and oversight
costs, which will be direct billed from the IEPA to you. The IEPA also assesses a $2,500 fee when the
NFR letter is issued.
We anticipate that more than one Terracon invoice may be submitted as various tasks are completed;
however, not more frequently than on a once -a -month basis, if additional work is required outside the
scope of this proposal, you will be contacted and upon request, proposed costs for additional work will
be provided. Client authorization will be obtained prior to commencement of additional work outside
the scope of this proposal.
If this proposal meets with your approval, work may be initiated by returning a fully executed copy of
the attached Change Order No. 1. This fee is valid for 90 days from the date of this proposal. This cost
includes Terracon professional labor costs, travel, direct expenses, subcontractors and analytical
testing required to complete this scope of work using the project assumptions described herein.
The proposal and cost estimate were prepared based on the following assumptions:
Client will provide to Terracon, prior to mobilization, legal right of entry to the site to
conduct the scope of services. Access will be provided to the area(s) of proposed
drilling/sampling.
Client will notify Terracon, prior to mobilization, of any restrictions, special site access
requirements, or known potentially hazardous conditions at the site (e.g., hazardous
materials or processes, specialized protective equipment requirements, unsound structural
conditions, etc.)
Client and/or site representatives shall provide information on the presence and location
of private utilities, operational piping and subgrade features. This scope includes
Explore with us 8
Proposal for Environmental Services
erraeon
Former Grainco FS, Kendall County Farm Bureau, and City Parking Lot n Yorkville, Illinois
July 11, 2025 o Terracon Proposal No. P11257066
performing a private utility locate to clear boring locations of subsurface utilities prior to
beginning sampling. Terracon is not responsible for damages related to improperly
marked utilities.
Level D personal protective equipment will be adequate for site work.
PJ We estimate the comprehensive site investigation field activities including soil, soil gas,
and groundwater sampling/surveying will be completed over a period of up to
approximately 4 weeks, depending on subcontractor availability, weather conditions,
and accumulation of groundwater in the monitoring wells.
If the site data collected indicates that additional site characterization is required before the
evaluation can be completed, a supplemental proposal will be issued to complete the
needed work. The goals of the comprehensive site investigation scope of work will be to
define the extent of impact vertically and horizontally.
Work can be performed during normal business hours (Monday through Friday, 8:00 am
to 5:00 pm).
Traffic control services are not required.
The drilling/sampling locations are readily accessible by Geoprobe° truck- or track -
mounted equipment.
To avoid delays in the proiect schedule Client will ensure that proposed boring,
monitoring well and soil gas point locations are accessible and not blocked by vehicles,
or covered by snow or other obstructions.
Disposal of up to nine drums of investigation -derived waste soils and one drum of purge
water (assuming non -hazardous) is included in these costs.
The analytical testing will be conducted on a standard TAT basis (5- to 7-business days)
from receipt of the samples by the laboratory. Analytical testing can be expedited upon
request, for additional fees.
The RAP assumes standard use of dig and haul methods, installation of engineered
barriers, and use of institutional controls. A separate proposal would be required for
submission of Tier 3 ROs, non-standard barrier, active remediation, or building control
technology engineering designs, if required.
This proposal does not include UST removal, remediation, remediation observation, or
RACR preparation; these activities will be addressed in a supplemental proposal tailored
to needs following site investigation activities and IEPA review.
This proposal does not include closure of the monitoring wells and soil gas monitoring
points; a supplemental proposal to properly abandon the monitoring wells and soil gas
monitoring point will be provided once no additional groundwater or soil gas sampling
appears necessary based on analytical results and IEPA's review.
IEPA fees for SRP enrollment, document review, and the NFR assessment/letter are not
included in this proposal. The IEPA's review fees and NFR letter assessment fee are
charged directly to the Remediation Applicant (i.e., the Client).
If any of these assumptions or conditions are not accurate or changes during the project, the stated fee is
subject to change. Please contact us immediately if you are aware of any inaccuracies in these
assumptions and conditions, so we may revise the proposal or fee.
Explore with us 9
Proposal for Environmental Services%rracon
Former Grainco FS, Kendall County Farm Bureau, and City Parking Lot 0i Yorkville, Illinois
July 11, 2025 a Terracon Proposal No, P11257066
4.0 SCHEDULE
We are prepared to commence work on the project immediately upon receipt of written authorization.
The field activities will be coordinated with the Client and/or their site representatives. It is anticipated
that the installation of the soil borings, monitoring wells, and soil gas points will be completed in three
working days pending on the weather condition. Groundwater and soil gas sampling, hydraulic
conductivity testing, and monitoring well elevation surveying is estimated to take three working days
over a time period of approximately two to three weeks, depending on the presence of groundwater.
The standard analytical TAT of 5- to 7- business days has been budgeted for this project.
An approximate schedule for the SRP activities included in this proposal is as follows:
Action Anticipated Time Frame
Comprehensive Site Investigation (CSI) Depending on driller availability, the CSI activities will be started
within approximately two weeks of receiving Client
authorization.
Preparation of IEPA SRP Combined Report A draft report will be available within six to eight weeks following
— Draft CSIRIROR/RAP Terracon's receipt of the final laboratory analytical report,
assuming results do not warrant additional investigation to meet
requirements.
Incorporation of Client comments and IEPA 3-5 business days pending Client review time.
submittal of final Combined SRP Report
IEPA review of the CSIR/RORIRAP report 190 days per IEPA regulations for IEPA to review
Site cleanup activities will likely take place during site redevelopment. The RACRINFR Letter request
will be prepared upon completion of the site cleanup activities. These efforts are not included in this
proposal.
5.0 LIMITATIONS
Terracon's services will be performed in a manner consistent with generally accepted practices of the
professional undertaken in similar studies in the same geographic area during the same period.
Terracon makes no warranties, expressed or implied, regarding its services, findings, conclusions or
recommendations. Please note that Terracon does not warrant the work of laboratories, regulatory
agencies or other third parties supplying information used in the preparation of the report. These
services will be performed in accordance with the scope of work agreed with you, our client, as set
forth in this proposal.
Findings, conclusions, and recommendations resulting from these services will be based upon
information derived from on -site activities and other services performed under this scope of work; such
information is subject to change over time. Certain indicators of the presence of hazardous substances,
petroleum products, or other constituents may have been latent, inaccessible, unobservable,
nondetectable or not present during these services, and we cannot represent that the site contains no
Explore with us 10
Proposal for Environmental Services Terracon
Former Grainco FS, Kendall County Farm Bureau, and City Parking Lot 0 Yorkville, Illinois
July 11, 2025 ® Terracon Proposal No. P11257066
hazardous substances, toxic substances, petroleum products, or other latent conditions beyond those
identified during the proposed activities. Subsurface conditions may vary from those encountered at
specific borings or wells or during other surveys, tests, assessments, investigations or exploratory
services; the data, interpretations, findings and our recommendations are based solely upon data
obtained at the time and within the scope of these services.
6.0 AUTHORIZATION
This proposal is valid for 90 days. We appreciate the opportunity to be of continued service on this
project. If this proposal meets with your approval, please sign the attached Change Order No. 1 and
return a copy to our office via email to Mike Lawrence at mike.lawrencec&-terracon.com or Dave Moon
at dave.moon@terracon.com. The terms, conditions, and limitations stated in the Agreement for
Services and sections of this proposal incorporated therein shall constitute the exclusive terms and
conditions and services to be performed for this project.
Terracon appreciates the opportunity to be of continued service, and we look forward to working with
you on this project. If you should have any questions or comments regarding this proposal, please
contact either of the undersigned.
Sincerely,
Terracon Consuttants, Inc.
Michael Lawrence, P.E. J. David Moon
Senior Environmental Engineer Senior Principal
Attachments: Exhibit 1 - Proposed Boring/Well/Soil Gas Point Locations Diagram
Change Order No. 1
Explore with us 11
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Reference Number: P11257066
CHANGE ORDER No, 1
This Change Order No. 1 to the Former Grainco Site Environmental Services dated 11/0412024 ("Agreement") is between The United City of Yorkville IL
("Client") and Terracon Consultants, Inc. ("Consultant") for additional or changed Services to be provided by Consultant for Client on the Former Grainco FS,
Kendall County Farm Bureau, and City Parking Lot Project, as described in Former Grainco Site Environmental Services, This Change Order is incorporated
into and made part of the Agreement.
1. Scope of Services. The scope of the additional or changed Services is described in the Scope of Services section of Consultant's Change Order
Proposal, unless Services are otherwise described below or in Exhibit B to this Change Order (which section or exhibit are incorporated into the
Change Order).
Refer to attached proposal P11257066.
2. Compensation. Client shall pay compensation for the additional or changed Services performed at the fees stated in the Change Order Proposal
unless fees are otherwise stated below or in Exhibit C to this Change Order (which section or exhibit are incorporated into the Change Order).
Refer to attached proposal P11257066.
All terms and conditions of the Agreement shall continue in full force and effect. This Change Order is accepted and Consultant is authorized to proceed.
Consultant: Terracon Consultants, Inc.
By: /)��yy��/ L-- Date, 7/11/2025
Name/Title: J. David Moon / Department Manager
Address: 192 Exchange Blvd
Glendale heights, IL 60139-2089
Phone: (630)717-4263 Fax: (630)357-9489
Email: Dave.Moon@terracon.com
Client: The Un' of Yorkville IL
By: Date:
NametTitle:
Bart'Olson ! City Administrator '
Address:
651 Prairie Pointe Drive
Yorkville, IL 60560
Phone:
Email:
(630) 553-8537 Fax: CiientFax
bolson@yorkville.it.us
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