HomeMy WebLinkAbout2019-201CCNA2018 WORK ORDER 5
GROUNDWATER MODELING AND IMPACT EVALUATIONS IN SUPPORT
OF MODIFICATION OF WATER USE PERMIT NUMBER 10524
This Work Order Number 5 is entered into as of this 3rd day ofDecembe2019, pursuant to that certain
Continuing Consulting Engineering Services Agreement for Professional Services entered into as of this 17th day
of April, 2018 (collectively referred to as the "Agreement"), by and between INDIAN RIVER COUNTY, a
political subdivision of the State of Florida ("COUNTY") and CDM Smith ("Consultant").
The COUNTY has selected the Consultant to perform the professional services set forth on
Exhibit A (Scope of Work), attached to this Work Order and made part hereof by this reference. The
professional services will be performed by the Consultant for the fee schedule set forth in Exhibit B
(Fee Schedule), attached to this Work Order and made a part hereof by this reference. The Consultant
will perform the professional services within the timeframe more particularly set forth in Exhibit C
(Time Schedule), attached to this Work Order and made a part hereof by this reference all in
accordance with the terms and provisions set forth in the Agreement. Pursuant to paragraph 1.4 of
the Agreement, nothing contained in any Work Order shall conflict with the terms of the Agreement
and the terms of the Agreement shall be deemed to be incorporated in each individual Work Order as
if fully set forth herein.
IN WITNESS WHEREOF, the parties hereto have executed this Work Order as of the date first
written above.
CONSULTANT:
Print Name: Eric J. Grotke, P.E., BCEE
Title: Vice President
BOARD OF COUNTY COMMISSIONERS
OF INDIAN RIVER COUlyT�1�1
By:
SuAn Adams , Chairman
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Chi`.. � � •. *''.
BCC Approved Date: December 3, 2019
Attest: Jeffr y R. Smith, Clerk of Court and Comptroller
By: Vu
Deputy Clerk
Approved:
Jason El Brdwn, County Administrator
v
Approved as to form and legal sufficiency:
Wan T. Reingold, County Attorney
By:
Print Name: Eric J. Grotke, P.E., BCEE
Title: Vice President
BOARD OF COUNTY COMMISSIONERS
OF INDIAN RIVER COUlyT�1�1
By:
SuAn Adams , Chairman
.••''tip rri i .....
Chi`.. � � •. *''.
BCC Approved Date: December 3, 2019
Attest: Jeffr y R. Smith, Clerk of Court and Comptroller
By: Vu
Deputy Clerk
Approved:
Jason El Brdwn, County Administrator
v
Approved as to form and legal sufficiency:
Wan T. Reingold, County Attorney
EXHIBIT A
CCNA-2018 WO NO. 5
FOR
INDIAN RIVER COUNTY UTILITIES
GROUNDWATER MODELING AND IMPACT EVALUATIONS IN SUPPORT
OF MODIFICATION OF WATER USE PERMIT NUMBER 10524
This Work Order, when executed, shall be incorporated in and become part of the Agreement for
Professional Services (Contract #2018008) between Indian River County (OWNER), and CDM Smith Inc.
(CONSULTANT), dated April 17, 2018, hereafter referred to as the Agreement.
PROJECT BACKGROUND
The OWNER owns and operates two Water Treatment Plants [WTPs], the South County WTP and North
County WTP. The South County WTP withdraws groundwater from seven existing Upper Floridan
Aquifer (UFA) production wells, while the North County WTP relies on groundwater from nine existing
UFA production wells. OWNERS's existing Consumptive Use Permit (CUP) (10524) currently allows for a
total combined groundwater withdrawal allocation of 12.838 million gallons per day [mgd], with 6.438
mgd from the North County wellfield and 6.40 mgd from the South County wellfield.
The current CUP expires on October 11, 2031. OWNER has experienced an increase in demand due to
population growth and domestic self -supply users switching over to OWNER's water supply. OWNER
began a draft application requesting modification of the existing CUP to the St. Johns River Water
Management District (SJRWMD) in 2016. Groundwater modeling was performed to determine if there
would be impacts on the water resources, environment, or other permitted users due to the anticipated
increases in OWNER withdrawals from the UFA. CONSULTANT used a modified version of the South
Florida Water Management District (SFWMD) East Coast Floridan Aquifer Model (ECFM) to perform the
impact analysis for the UFA. Since the ECFM did not include the Surficial Aquifer System (SAS), the
SJRWMD Coupled Aquifer [COUAQ] model was used to determine the drawdown in the Surficial Aquifer
System (SAS) due to increased pumping and groundwater level drawdown in the UFA. The groundwater
modeling results and analysis were summarized in a report that along with the model input and output
files were submitted to the SJRWMD in support of the draft CUP application. SJRWMD staff previously
approved the model as the best tool available for UFA uses in the area and the results of the modeling
and impact evaluations. In 2016, the primary obstacle for the OWNER in obtaining their CUP
modification was impacts to existing legal users near the north wellfield. OWNER developed a
mitigation plan which was accepted and approved by the Board of County Commissioners and SJRWMD.
Due to the resurgence of development, the OWNER must now modify the permit to account for the new
and future demand projections. Based on actual groundwater withdrawals and an approximate 2
percent increase in demands overtime (including an expanded service area), the 2050 demand was
calculated to be 23.81 mgd. This is an increase from the existing EOP withdrawal of 12.838 mgd , which
was used in the draft 2016 CUP application and the associated groundwater modeling and impact
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analysis. Additional modeling simulations are therefore necessary to determine whether the new
demand of 23.81 mgd will cause any adverse impacts to water resources, environmental resources, and
other legal users.
This Work Order has been developed to provide the groundwater modeling services with the new
projected 2050 demands in support of the CUP modification.
SCOPE OF WORK
The following is a description of the work to be provided under this Work Order.
TASK 1 - GROUNDWATER MODELING AND IMPACT EVALUATIONS
The CONSULTANT will perform the required groundwater modeling for inclusion in the initial permit
application submittal to SJRWMD. Modeling will be performed using the modified ECFM for the
increased UFA allocation and COUAQ model to determine impacts on the SAS consistent with the 2016
modeling and be required by SJRWMD for the 2020 CUP application. These models were used during
previous permit modification attempt in 2016 that were initially accepted by SJRWMD.
Up to three (3) groundwater modeling simulations will be performed using the End -of -Permit (EOP)
withdrawals for all permitted users, IRCU wells pumping at 0 mgd, and at the requested allocation
increase of 23.81 mgd. These three simulations are listed below:
1. Simulation 1 (SIM 1) — IRCU wells and other legal user wells within the model domain pumping at
their current EOP withdrawal rate. The CONSULTANT has received a geodatabase from
SJRWMD containing EOP withdrawals for all permitted users within the model domain.
Simulation 2 (SIM2) — IRCU wells pumping turned off (0 MGD) and other permitted user wells
within the model domain pumping at their current EOP withdrawal rate. SJRWMD no longer
uses 1995 conditions as baseline conditions and uses "pumps off' (0 mgd) for the applicant's
withdrawal for this simulation.
3. Simulation 3 (SIM3) — IRCU wells pumping at their requested withdrawal rate for 2050 (23.81
mgd) and other permitted user wells within the model domain pumping at their current EOP
withdrawal rate.
These simulations are consistent with the requirements outlined by the SJRWMD in an email dated
October 30, 2019. The latest EOP water use withdrawal database will be obtained from the SJRWMD for
other permitted users. The wells from this database will be compared to the permitted user wells used
during the previous modeling in 2016. Any wells that have been abandoned or capped since 2016, will
be removed from the model while any wells that have been permitted since 2016 will be added to the
model.
The distribution of the 2050 (SIM3) pumping rate between IRCU North and South wellfields will be made
after consultation with the OWNER.
Model simulations will be used to determine the effects, if any, from the pumpage of the OWNER's
wellfield(s) based on the following resources evaluation criteria:
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• No interference with other existing permitted uses (permitted user experiences 10 percent or
greater reduction in withdrawal capability);
• Cannot induce saline water intrusion (movement in saline water interface or change in
groundwater geochemistry);
• Cannot create or contribute to pollution of the water resources;
• Cannot adversely affect existing offsite land uses;
• Cannot produce impacts to wetlands; and
• No lowering minimum flow and levels for designated water bodies.
CONSULTANT will produce maps showing the anticipated cone of depression for each wellfield pumping
scenario and contours of incremental and cumulative groundwater level drawdown due to pumping.
These maps will be used in the evaluation of potential impacts to the resource evaluation criteria above.
A modeling report describing the model that was used, a description of the simulations performed, the
results of the modeling and impact evaluations including figures and tables will be submitted to the
OWNER for review and comment. The CONSULTANT will review and incorporate OWNER comments and
finalize the groundwater modeling memorandum. This final report will be used to support the
application to renew and modify the OWNER's CUP. The groundwater modeling and impact evaluation
Technical Memorandum and model input/output files will be included with the permit application
package on the SJRWMD ePermitting portal.
TASK 2 - PROJECT AND QUALITY MANAGEMENT
Activities performed under this task consist of those general functions required to maintain the project
on schedule, within budget, and that the quality of the work products defined within this Work Order is
consistent with CONSULTANT's standards and the OWNER's requirements. Specific activities included
are identified below:
Subtask 2.1 - Project Quality Management
CONSULTANT maintains a Quality Management System (QMS) on all projects. In accordance with the
QMS, a project planning and scope review meeting will be conducted at the start of the project. In
addition, the CONSULTANT's Technical Specialists will perform quality reviews of the deliverables
identified in Task 1.
Subtask 2.2 - Project Status Reports
CONSULTANT's project manager will prepare and submit monthly written status reports with each
invoice for an anticipated project duration of 4 months.
OTHER SERVICES NOT INCLUDED IN THIS WORK ORDER
This Work Order does not include the following items:
• Development of a water conservation plan
• Development of a Reuse Feasibility Study;
• Unaccounted for water use survey;
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Preparation of a Consumptive Use Permit application
Permit application fee; or
Modeling changes for Requests for Additional Information.
OWNER's RESPONSIBILITIES
The OWNER will provide all available data requested by the CONSULTANT for the purpose of completing
the aforementioned tasks. The data necessary for this project are, but not limited to the following:
• Projected water use demands for IRCUD in electronic format.
The OWNER will also provide a timely review of all work products.
SCHEDULE
It is anticipated that the Project will take a total of 3 months to complete, starting within two weeks of
receipt of a formal notice to proceed (NTP). The groundwater modeling report with impact evaluations
is estimated to be completed within 90 days of Notice -to -Proceed. CONSULTANT will prepare an
updated detailed schedule within the first 10 calendar days after Notice to Proceed.
COMPENSATION AND PAYMENT
Compensation for the work described in this Work Order shall be made on the basis of a lump sum fee.
The lump sum fee for Tasks 1 and 2, inclusive, is $64,800 as shown in Exhibits B-1 and B-2. CONSULTANT
will invoice OWNER on a monthly basis based on percent complete. For invoice purposes only, the value
of each task is as shown in the Table 1.
Table 1
TASK VALUE FOR INVOICE PURPOSE
TASK DESCRIPTION
VALUE
1 Groundwater Modeling and Impact Evaluations
$57,390
2 Project and Quality Management
$7,410
TOTAL WORK ORDER NO. 6 - LUMP SUM
$64,800
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