HomeMy WebLinkAboutResolution - 2014-R0047 - Amendment To Agreement - Terracon Consultants Inc. - 02/13/2014RESOLUTION
BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF LUBBOCK:
THAT the Mayor of the City of Lubbock BE and is hereby authorized and
directed to execute for and on behalf of the City of Lubbock, an Amendment to a
Professional Services Agreement, by and between the City of Lubbock and Terracon
Consultants, Inc., and all related documents. Said Amendment is attached hereto and
incorporated in this Resolution as if fully set forth herein and shall be included in the
minutes of the Council.
Passed by the City Council this
ATTEST:
Reb cca. Garza, City Secretary
APPROVED AS TO CONTENT:
February 13 , 2014.
GL ROB RTSON, MAYOR
k - ",-/
R. Keith Smith, P.E., Director of Public Works
APPROVED AS TO FORM:
Am sorne
Res-Amend.Prof Srvs Agrmnt Terracon Consultants, Inc
1.7.14
January 2014
STATE OF TEXAS
COUNTY OF LUBBOCK
FIFTH AMENDMENT
TO
PROFESSIONAL SERVICES AGREEMENT
This Fifth Amendment to Professional Service Agreement is entered into this
day of , 2014 between the City of Lubbock, a Texas
municipal corporation (hereinafter called "the City") and Terracon Consultants, Inc. (the
"Engineer"), a Delaware corporation.
WHEREAS, the Engineer and the City have previously entered into certain Professional
Service Agreement dated November 20, 2008, Resolution No. 2008.80453 (Contract #8773)
(hereinafter called "the Agreement"); and
WHEREAS, the Engineer and the City previously amended the Agreement on January
26, 2012, Resolution No. 2012-RO041; and
WHEREAS, the City and the Engineer hereby desire to further amend said agreement.
NOW THEREFORE, the City and the Engineer hereby agree to amend the Agreement
as follows:
1) That "Attachment A" of the Agreement is hereby substituted and replaced with
"Attachment A1.2014" that is that is attached hereto.
2) This amendment to the Agreement shall be effective upon execution. The remainder
of the Agreement shall remain in full force and affect except as changed herein.
Jai, 2014
Page 1 of 10
January 2014
IN WITNESS WHEREOF, the parties have executed this Agreement by their duly
authorized representatives as of the date first written above.
CITY OF LUBBOCK
GLEN RTS N, MAYOR
ATTEST:
D, 12�e e,& -e '5-K— —
L cca Garza; City ttcar y
APPROVE} -AS. TO CONTENT:
R. Keith Smith, lyt., Director of Public Works
APPROVED AS TO FORM:
A si Attorney
TERRACON
By:cb'�
Name:ywn aidw4e----a
Title: irine-
Jan 2014
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January 2014
ATTACHMENT A1.2014
Described below is the scope of work and associated fees for Terracon to provide consulting services to the
City of Lubbock for the Hancock Land Application Site (HLAS) and Lubbock Land Application Site
(LLAS). This exhibit outlines specific tasks, budgets, and not to exceed amounts for Terracon to complete
the scope of work. Terracon's fee schedule that will be used for negotiating fees for Additional Services
not included in this scope of work is also attached.
Specific tasks to allow Terracon to assist the City to define project strategies and/or interface with the Texas
Commission on Environmental Quality (TCEQ) are included in this scope of work. In addition, Terracon
has included tasks to manage project data and prepare state mandated routine annual monitoring reports for
the HLAS and LLAS for submission to the TCEQ in May 2014. The 2014 Annual Report for the LLAS
will include an updated groundwater model for the LLAS that was originally revised for the 2010 Annual
Report. In addition, specific tasks are included to evaluate additional information pertaining to water and
soil quality, and groundwater elevations in the vicinity of the LLAS and HLAS.
Additional tasks such as the installation of groundwater monitoring wells, and efforts to prepare a revised
remediation plan for the LLAS in 2014 may be negotiated as Additional Services and may be added to this
Agreement by amendment hereof.
Task 1— Strategic Planning and Meetings
This task includes the review of updated project data as necessary, site visits, strategic planning with the
City of Lubbock, and interfacing with City of Lubbock Staff and TCEQ regulators. Terracon will meet with
City of Lubbock personnel to discuss strategic planning for the LLAS and HLAS including regulatory
compliance and closure issues. The strategic planning session(s) will address both short-term and long-term
planning. The short-term planning discussions will include wastewater operations, farming operations, and
remediation activities at the LLAS. The long-term planning discussions will include the wastewater
development and water use planning and the beneficial use of the property. The long-range planning will
also be used to develop a monitoring, remediation, and closure strategy for the LLAS. At least one strategic
planning meeting in Lubbock is proposed during the course of the year. Additional project meetings will be
scheduled as necessary.
Terracon will assist the City of Lubbock with their discussions with the TCEQ as necessary. The LLAS is
currently operated, monitored, and remediated pursuant to the permit effective January 1, 2012. Terracon
will assist the City of Lubbock as necessary, and as requested, to evaluate technical issues pertaining to the
permit. If requested, a detailed scope of work will be prepared as a supplemental task in 2014 to prepare a
revised groundwater remediation plan for the LLAS in 2014.
Task 2 — HLAS Annual Budget
Terracon shall complete two main project tasks related to compliance with the City of Lubbock's TPDES
permit No. 10353-002 related to the HLAS. The project tasks and associated work scope are summarized
below.
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January 2014
HLAS Data Mana,-enzent
This task will involve database file management including database updates, preparation of supporting
graphs, and review of data provided by the City of Lubbock during the fiscal year. The City of Lubbock
will collect onsite groundwater samples, gauge monitor wells, and procure laboratory services. The city -
contracted laboratory will be NELAC accredited. Sampling data will not be reviewed and reported
pursuant to TRRP-13 (Review and Reporting of COC Concentration Data). Thus, Terracon has not
included a usability review of the data or the preparation of a Data Usability Summary (DUS).
It is anticipated that the following data will be collected, compiled, and included in the databases during the
fiscal year:
• Annual groundwater level measurements from thirty-one offsite irrigation wells measured by the
High Plains Underground Water Conservation District;
• Quarterly nitrate data from southern onsite monitor wells (MW -IA, MW -2A, MW -34, MW -35, and
MW -36);
• Semi-annual nitrate data from 36 onsite wells;
• Annual static water level data from 36 onsite wells;
• Annual groundwater quality data from 36 onsite wells;
• Annual groundwater quality field sampling data (i.e., pH, conductivity, oxidation/reduction
potential, dissolved oxygen, and temperature) from 36 onsite wells; and
• Annual groundwater data from offsite private wells sampled as part of the bottled water program
administered by the City of Lubbock.
Terracon will integrate laboratory and field collected data into existing databases. Terracon will review the
data for trends and spatial distribution. Throughout the year, as data are compiled and reviewed, Terracon
will evaluate the data and communicate findings with the City of Lubbock staff and attorneys.
HLAS Annual Report
This task involves preparation of the HLAS annual report. The HLAS annual report will summarize the
project history and monitoring activities, and will include tabular sampling and gauging results and maps of
nitrate iso -concentrations and potentiometric contours. Terracon will prepare a draft report that will be
submitted to the City of Lubbock and attorneys for review and comments. Terracon will work with the City
of Lubbock and attorneys to address any comments and will prepare a final report. The report will be
sealed by a licensed professional geoscientist or licensed professional engineer. The report is due to the
TCEQ by the end of May.
Task 3 — LLAS Annual Budget
Terracon shall initially complete three main project tasks related to compliance with the City of Lubbock's
TPDES Permit No. 10353-002 related to the LLAS and one supplemental task. The three project tasks and
associated work scope are summarized below.
Jan 2014
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January 2014
LLAS Data Management
This task will involve database file management including database updates, preparation of supporting
graphs, and review of data provided by the City of Lubbock during the fiscal year. The City of Lubbock
will collect onsite groundwater samples, gauge monitor wells, and procure laboratory services. The city -
contracted laboratory will be NELAC accredited. Sampling data will not be reviewed and reported pursuant
to TRRP-13. Thus, Terracon has not included a usability review of the data or the preparation of a DUS.
It is anticipated that the following data will be collected, compiled, and included in the databases during the
fiscal year:
• Monthly groundwater production data for approximately 40 recovery wells and the booster pump
station;
• The amount of water sent to the JBLS, golf course, cemetery, and other potential irrigated areas;
• Semi-annual nitrate data from approximately 150 site wells;
• Annual static water level data from approximately 150 site wells;
• Annual groundwater quality data from approximately 150 site wells;
• Annual groundwater quality field sampling data (i.e., pH, conductivity, oxidation/reduction
potential, dissolved oxygen, and temperature ) from approximately 150 site wells; and
• Quarterly North Fork data upstream of FM 400 and monthly lake nitrate data; and
• Annual groundwater data from offsite private wells sampled as part of the bottled water program
administered by the City of Lubbock.
Terracon will integrate laboratory and field collected data into existing databases. Terracon will review the
data for trends and spatial distribution. Throughout the year, as data are compiled and reviewed, Terracon
will evaluate the data and communicate any findings with the City of Lubbock staff and attorneys.
Groundwater Model Update
As required for the May 2014 LLAS Annual Report to the TCEQ, this task will involve preparing an annual
update to the existing MODFLOW/MT3D computer model prepared for the LLAS that was revised by
Terracon for the 2010 LLAS Annual Report. As directed by the TCEQ, the May 2014 LLAS annual
report will include a discussion of the revisions and update to the groundwater MODFLOW/MT3D model
to include a re -calibration of the model for 2014 to simulate flow conditions and water quality at the LLAS
over the next five year period. Terracon will procure the services of Dr. Ken Rainwater and his associates
for the groundwater modeling task to support the preparation and submission of the 2014 LLAS Annual
Report, and they will focus on those modeling tasks necessary to re -calibrate the model based on
comparison of modeled data to actual data from 2013 and the previous years. Once the model has been
calibrated to match approximate groundwater levels and nitrate concentrations, the current nitrate
concentration data will be input into the model to generate a prediction of future conditions for a 5 -year
predictive period in accordance with the current Remediation Plan. The modeling description and results
will be presented in the 2014 LLAS Annual Report as described below.
In addition, this task will include evaluation of the model throughout the remainder of the year to include a
comparison of actual flow data vs. modeled flows and evaluation of the integration of new data from the
deep-seated nitrogen investigation data to the modeled infiltration.
LLASAnnual Report
This task will involve preparation of the LLAS annual report. The LLAS annual report will summarize the
project history and monitoring and remediation activities, and will include tabular sampling and gauging
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January 2014
results and maps of nitrate iso -concentrations and potentiometric contours. The May 2014 LLAS annual
report will also include a discussion of the 2013 LLAS MODFLOW/MT31) model based on the updated
nitrate distribution in groundwater and expected groundwater withdrawal rates, wastewater application
rates, and typical rainfall. Nitrate data from the offsite bottled water sampling program will also be
evaluated. Terracon will prepare a draft report that will be submitted to the City of Lubbock and attorneys
for review and comments. Terracon will work with the City of Lubbock and attorneys to address any
comments and will prepare a final report. The report will be sealed by a licensed professional geoscientist
or licensed professional engineer. The report is due to the TCEQ by the end of May each year.
Task 4 - Project Management / Communications
During the course of the project, there will be times when Terracon will need to provide overall project
management duties, communicate and meet with the City of Lubbock staff, attorneys, the TCEQ, and with
Agri -Waste Technologies (AWT) regarding routine matters or to address questions that arise from
operations and management of the HLAS and LLAS. This would also include ongoing technical
consultation to support sampling activities for the onsite and offsite areas. Initial meetings with City of
Lubbock staff and/or the TCEQ in Austin are addressed in Task 1. Additionally in Task 4, Terracon
anticipates an additional meeting with City of Lubbock to update project status and discuss additional needs
that may arise.
Task 5 — Supplemental Deep Seated Nitrogen Investigation at LLAS
Soil Borings and Nitrogen Analysis
The scope of work presented herein includes the advancement of five supplemental soil borings at selected
locations at the LLAS. Depending on property access, the focus of the deep seated nitrogen investigation in
2014 will be on the Contract/210 plots not owned by the City and on which AWT nitrogen and water balance
data indicate a potential for excess nitrogen or water application. Terracon will procure the services of a
subcontracted licensed water well driller. The proposed scope of work is intended to supplement similar work
completed in previous years which identified potential sources of deep seated nitrogen in unsaturated soils
beneath certain areas of the LLAS. The actual locations will be selected following completion of the
unsaturated modeling work completed in 2013 and discussion with the City of Lubbock staff. The proposed
costs assume Terracon labor and oversight but also assume that City of Lubbock sampling technicians familiar
with the site and protocols will provide sampling support and assistance particularly pertaining to the clearing
of subsurface utilities prior to drilling... Depending on drilling conditions, soils will be collected continuously
using a split barrel sampling device and logged by a Terracon geoscientist. Sample aliquots will be collected at
approximately two foot intervals and archived by the laboratory. Initially, samples from approximately every
four foot interval will be analyzed in the laboratory for soil nitrate (EPA Method 300.0) and soil moisture
content to allow the results to be reported on a dry -weight basis. If elevated nitrate concentrations are observed,
additional archived samples from adjacent intervals may also be analyzed for nitrate and soil moisture content.
In addition, up to a total of five soil samples will be analyzed by sieve analysis (ASTM D Method D422) for
grain size distribution. At the proposed locations for the deep seated nitrogen investigation, the depth to the
water table is expected to range between 70 to 100 feet below grade. For the purpose of this cost estimate, it is
assumed that the borings will extend to an average depth of 90 feet below grade and that the spoils (soil
cuttings) can be spread onsite on nearby roadways of pivot irrigator tracks. Terracon will meet with the City of
Lubbock to approve the precise locations of the proposed borings and will help coordinate utility clearance with
Texas One Call (Dig -Tess). The City of Lubbock will be responsible for identifying the location of private
subsurface utilities not identified during the Dig Tess utility clearance.
Jan 2014
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January 2014
Task 6 — Refine LLAS Unsaturated Zone Model for Future Nitrate Loading
The objective of Task 6 will be to build upon the unsaturated zone modeling work in previous years to
predict nitrate travel times and loading rates to the underlying groundwater. Existing nitrogen and water
balance estimates calculated by AWT over the last decade of effluent application will be reviewed along
with other data obtained from previous investigations of deep seated nitrogen performed by the City of
Lubbock and Terracon to improve the understanding of the likely distribution of unsaturated nitrate beneath
the LLAS and Contract 210 plots. This information, along with the future assumed effluent application or
irrigation rates, will be input to the HYDRUS unsaturated zone transport model, a public domain code, to
predict the likely nitrate transport and loading over time to the water table and to evaluate nitrate source
management options. Terracon will procure the services of Dr. Ken Rainwater and his associates to
develop the HYDRUS model simulations. This nitrate loading information predicted by the HYDRUS
unsaturated model will serve as potential input to future simulations of the saturated LLAS groundwater
model using MODFLOW-MT3D.
In previous saturated zone groundwater modeling efforts, the values of the nitrate input with recharge in the
LLAS MODFLOW-MT31) model were based on calibration to fit the historical groundwater nitrate
distributions and informed by the distribution of applied effluent across the different LLAS irrigation plots.
When these nitrate inputs were used in the 5 -year groundwater model predictions, it was assumed that the
near future would be like the recent past. However, when longer simulations of 30 years are made, the
uncertainty of those calibrated nitrate inputs persisting over the entire 30 year period becomes much more
questionable. As proposed herein, an improved understanding of longer term loading and groundwater
impact could be achieved with the use of the HYDRUS unsaturated zone model.
One project meeting is included in the scope of this task in order to meet with City of Lubbock personnel to
discuss the results of the study effort. Terracon will prepare a draft report that will be submitted to the City
of Lubbock and attorneys for review and comments.
Task 7 - Design Basis Optimization Study
The purpose of the remedial system design optimization for the LLAS is to automate—in a smart manner—
the search for the best strategy to remediate the plume while simultaneously honoring all the subsurface
flow and transport processes and project economics. The design optimization study has been divided into
two phases to allow for the necessary interaction with City staff to ensure that the results of the study
provide a remediation design for the LLAS that achieves the long-term goals of the City of Lubbock.
Phase 1 Tasks (2014)
1) Prepare Optimization Framework for Groundwater Flow and Transport Model and
Remediation System
This task will include incorporating the desired system objectives and constraints into
appropriate model counterparts and defining and obtaining each of the cost elements needed for
input to the optimization engineering calculations. For the purposes of this task, it is assumed
that the City of Lubbock will provide plans and specifications for the existing infrastructure to
include the pumps in each well and the locations and line sizes of the recovery system
pipelines. The optimization incorporates and processes all the same cost information in a
project planning spreadsheet including the cost of new, or rehabilitation of existing, extraction
wells (drilling and equipment), pipeline construction, and additional storage and pumping
Jan 2014
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January 2014
capacity as well as operation costs for maintenance, pumping, etc. . Instead of manually
searching through the combinations of candidate system designs and operational strategies, it
automatically selects the best combination of infrastructure and operations to develop the
optimal strategy to achieve project objectives. This results in savings in both labor analysis
costs and in the total costs of achieving the desired remediation objectives.
b. The existing MODFLOW/MT3D model will be modified (changes should be limited but will
include updating the number of stress periods and boundary conditions). This step will also
include preparing required input data for the model, such as defining potential well locations
and preparing model input for those such as well coordinates, base of aquifer elevation, and
flow rates.
c. This task will include configuring the optimizer to work with the site-specific
MODFLOW/MT3D model. The optimizer currently supports the effect of the reduction of flow
rate over time as saturated thickness declines, which is a key attribute of the MODFLOW
MNW 1 well package (a fixed flow rate throughout the simulation period is not a requirement of
this optimizer).
2) Workshop to Determine Specific Scenarios to be Optimized
A workshop with City staff will be scheduled to present design objectives before optimization
begins. The primary objectives of this workshop will be to gain acceptance of the design basis
assumptions and to determine the specific scenarios to be optimized. This workshop will include a
"live" demonstration of the optimizer using a simplified test problem as well as provide detail on
the updated groundwater flow and transport model, optimization inputs and types of results output.
This information exchange will help the City team understand the types of information used by the
optimizer so as to better be able to collaborate on the problem design and solution.
3) Prepare Design Basis Report
A Draft Report will be prepared to fully document the design objectives, all input data and
assumptions used in the analysis, and the modeling and optimization tools.
Task 8 — Review Available Public Information from TCEQ Public Water Supply Wells and USGS
Data for Selenium in Groundwater Outside the Existing LLAS Pumping Network
The objective of this task will be to review and compile available TCEQ groundwater data on selenium from
public water supply wells and from available USGS data sets. This information will be combined with
available selenium data from LLAS monitor and recovery wells to evaluate potential impacts with expanding
the existing LLAS recovery well network relative to the 20 parts per billion discharge limit for recovered
groundwater discharged to the Jim Bertrand Lake System (JBLS). An updated isoconcentration map of
selenium in groundwater will be prepared and will be available for future modeling efforts.
Estimated costs to complete Tasks 1 through 8 are presented in Table 1. Please note that these costs are
conceptual in nature and were prepared for planning purposes only. In some cases, written cost estimates were
received from selected vendors and contractors and these estimates are subject to change depending on the
actual timeframe for the work and the exact nature and scope of the actual work performed. In other
circumstances, no written estimates were received and some costs were estimated based on Terracon's
experience with this and similar projects. It is also assumed that sampling technicians from the City of
Lubbock will be available to assist with the sampling activities to facilitate the overall effort.
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January 2014
Project Summary Budget
Terracon will perform this project on a time and materials basis using the attached Fee Schedule. This
proposal includes both one-time and routine activities. This proposal includes the annual costs to perform
routine tasks once. The project summary budget for Terracon to perform work defined related to the above
HLAS and LLAS tasks is as follows:
ESTIMATED FEES FOR PROFESSIONAL SERVICES
Task 1— Strategic Planning and Meetings $8,600
Task 2 — HLAS (annual budget) $20,600
Task 3 — LLAS (annual budget)
Task 3.1 — LLAS Data Management $8,600
Task 3.2 — Groundwater Model Update $35,500
Task 3.3 — LLAS Annual Report $25,000
Task 4 — Project Management (annual budget) $15,000
Task 5 — Supplemental Deep Seated Nitrogen Investigation at LLAS $40,000
Task 6 — Refine LLAS Unsaturated Zone Model $20,000
Task 7 — Design Basis Optimization Study for LLAS
Task 7.1 — Prepare Framework for GW Model Optimization $58,500
Task 7.2 — Scenario Selection Workshop $17,500
...Task 7.3 — Design Basis Report $17,000
Task 8 — Review Public Information for Selenium in Groundwater $2,500
TOTAL TASKS 1 THROUGH 8 $268,800
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1rerracon
ENVIRONMENTAL CONSULTING SERVICES
FEESCHEDULE
HOURLY FEES FOR PERSONNEL
Disposable Bailer each
Environmental Professional includes Environmental Engineer, Environmental Scientist, Geologist and Hydrogeologist
ExpertWitness.........................................................................................................................................
$175.00
Senior Principal / Program Manager.......................................................................................................
$160.00
Principal/Senior Consultant.....................................................................................................................
$155.00
GroupManager........................................................................................................................................
$125.00
Senior Environmental Engineer...............................................................................................................
$125.00
SeniorProject Manager...........................................................................................................................
$110.00
ProjectManager.......................................................................................................................................
$100.00
EnvironmentalProfessional V.................................................................................................................
$100.00
Environmental Professional IV..................................................................................................................
$95.00
Environmental Professional III..................................................................................................................
$85.00
Environmental Professional II...................................................................................................................
$75.00
Environmental Professional I....................................................................................................................
$65.00
Environmental Technician II.....................................................................................................................
$65.00
EnvironmentalTechnician I......................................................................................................................
$60.00
AdministrativeAssistant............................................................................................................................
$55.00
Draftsperson/CAD Operator......................................................................................................................
$55.00
WordProcessor.........................................................................................................................................
$50.00
Clerical......................................................................................................................................................
$45.00
TRAVEL EXPENSES
Reimbursable Expenses are charged at cost plus 10%.
VehicleCharge (local), per day................................................................................................................. $60.00
Mileage(per mile)....................................................................................................................................... $0.58
PerDiem.................................................................................................................................................. $125.00
Document Delivery/Overnight (per standard package)............................................................................. $20.00
FIELD EXPENSES
DevelopmentPump (Per day).................................................................................................................... $40.00
Disposable Bailer each
$20.00
GEM 2000 Gas Analyzer & Extraction Monitor (per day).....................................................................
$200.00
HandAuger (per day)................................................................................................................................
$25.00
Handheld GPS Instrumentation (per day)..................................................................................................
$45.00
High Flow Air Pump (Per day)..................................................................................................................
$50.00
IAQ Instrumentation (QTRAK, Moisture Meter) (per day)......................................................................
$50.00
InterfaceProbe (per day)...........................................................................................................................
$85.00
LowFlow Air Pump (per day)...................................................................................................................
$35.00
Low Flow Sampling Cell (includes YSI/Horiba & flow cell).................................................................
$150.00
Low Flow Bladder Pump (per day).........................................................................................................
$100.00
PeristalticPump (per day).........................................................................................................................
$50.00
pH/Conductivity/Temperature Meter (per day).........................................................................................$50.00
PIDMeter (per day).................................................................................................................................
$110.00
SampleKit (per boring).............................................................................................................................$35.00
SampleKit (per well)................................................................................................................................
$50.00
Submersible Purge Pump (Per day).........................................................................................................
$175.00
Trimble Pro XRS Pathfinder Backpack GPS (per day)...........................................................................
$165.00
WaterLevel Indicator (per day)................................................................................................................
$35.00
XRFMeter (per day)...............................................................................................................................
$350.00
SUBCONTRACTS AND THM PARTY CONTRACTS
With the exception of those subcontracts specifically listed above to be executed through Terracon at cost
plus 10%, other normal subcontract functions shall be executed through the City of Lubbock.
Upon City's
approval, other subcontracts may be executed through Terracon at cost plus 10%
Jan 2014
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