HomeMy WebLinkAboutContract 48794-A1 CITY SECRETA
CONTRACT NORM
AMENDMENT No.1
TO CITY SECRETARY CONTRACT No. 48794
WHEREAS, the City of Fort Worth (CITY) and CDM Smith, Inc. ,
(ENGINEER) made and entered into City Secretary Contract No. 48794, (the
CONTRACT) which was administratively authorized on the 6th day of March,
2017 in the amount of $5, 990. 00; and
WHEREAS, the CONTRACT involves engineering services for the
following project:
Westside Water Treatment Plant Regulatory Compliance; and
WHEREAS, it has become necessary to execute Amendment No. 1 to the
CONTRACT to include an increased scope of work and revised fee.
NOW THEREFORE, CITY and ENGINEER, acting herein by and through their
duly authorized representatives, enter into the following agreement,
which amends the CONTRACT:
1.
Article I of the CONTRACT is amended to include the additional
engineering services specified in a proposal dated February 7, 2018, a
copy of which is attached hereto and incorporated herein. The cost to
City for the additional design services to be performed by Engineer
totals $2, 935.00.
2.
Article II of the CONTRACT is amended to provide for an increase in
the fee to be paid to Engineer for all work and services performed under
the Contract, as amended, so that the total fee paid by the City for all
work and services shall be an amount of $8,925. 00.
3.
All other provisions of the Contract, which are not expressly
amended herein, shall remain in full force and effect.
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EXECUTED and EFFECTIVE as of the date last written by a signatory,
below.
APPROVED:
City of Fort Worth ENGINEER
CD Smith Inc.
Jesus J. Chapa J. Dan Shannon
Assistant City Manager Senior Vice President
DATE: )Q rl DATE:
Q( �
APPR VAL RECOMMENDED:
Ke neth C. Morgan
Di ector, Water De artment
APPROVED AS TO FORM AND LEGALITY: M&C: N/A
Date.
Douglas W. Black I
Assistant City Attorney
ATTEST:
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City Secretary `Z
OFFICIAL RECORD
CITY SECRETARY
FT. WORTH,TX
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By
sl ng, I acknowledge that I arri the person responsible f'or the mariitoring:and
administration of this d6 tract. including ensuring Ell.perforMa.nee and reporting:
req(4tornents.
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801 Chery Street,Suite 1820,Unit#133
Fort Worth,TX 76102
Tel: (817)332-8727
Fax: (817)820-0450
February 7,2018
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Mr.Christopher Harder
Assistant Director
Fort Worth Water Department
200 Texas Street
Fort Worth,Texas 76102
Subject: Westside Water Treatment Plant
Regulatory Compliance Project
City Secretary Contract No.48794
Amendment No. 1
Dear Mr.Harder:
Per your previous request,this letter is being submitted for amendment of the Westside Water
Treatment Plant(WSWTP) Regulatory Compliance Project(Project)contract agreement.
Specifically,the Fort Worth Water Department(FWWD)has requested that CDM Smith prepare
and coordinate submission of a treatment process exception request to the Texas Commission on
Environmental Quality(TCEQ) for the WSWTP sedimentation process. Additional services will be
provided in accordance with terms of the contract agreement and based on the attached TCEQ
documents:
"I. Requesting an Exception to the the Clarification Unit Hydraulic Detention Time (HDT) or
Surface Overflow Rate(SOR)"
"II. Clarification Unit HDT/SOR Pilot Study Protocol"
And,the submission will be prepared by CDM Smith with the following considerations and
assumptions:
1. FWWD will be responsible for,in compliance with the above referenced TCEQ documents,
all data collection and pilot testing required for preparation of the submission.
2. FWWD will provide additional plant operational and maintenance data as required.
3. FWWD will be responsible for certification and accuracy of all analytical data provided for
the pilot study.
4. CDM Smith will utilize the final analytical data for development of the necessary tables,
graphs and data reports.
ti
WATER+ENVIRONMENT+TRANSPORTATION+ENERGY+FACILITIES
CDM
Smith
Mr.Christopher Harder
February 7,2018
Page 2
5. CDM Smith will conduct necessary coordination with TCEQ for the submission.
6. CDM Smith will develop a draft pilot study memorandum(PDF)for FWWD review.
7. CDM Smith will revise the pilot study memorandum per City comments,and finalize for
submission of the necessary copies to TCEQ and the City.
8. CDM Smith will review and assist with resolution of TCEQ response comments regarding
the memorandum submission.
With City provision of the required pilot operational and maintenance data,CDM Smith proposes
to complete the draft and final reports within 2 weeks and 4 weeks,respectively,of the
Amendment execution. For execution of these services,CDM Smith proposes an increase of the
Project upper limit by$2,935,to a maximum of$8,925.
We appreciate the opportunity to continue to work with the FWVJD. Please review this
amendment proposal,advise as to any questions/comm_ents,and confirm City requirements for
execution following acceptance of the proposal.
Sincerely,
Chad D.Bartruff, P
Project Manager
CDM Smith Inc.(1'X-3043)
cc: Martin Philips,FWWD
Charly Angadicheril,FWWD
Russ Pior,FWWD
Danny Shannon,CDM Smith
File: 62142 02.07.01 (218075)
CO
I. REQUESTING AN EXCEPTION TO THE CLARIFICATION UNIT HYDRAULIC
DETENTION TIME (HDT) or SURFACE OVERFLOW RATE (SOR)
Using a Hydraulic Detention Time(HDT)that is lower than, or Surface Overflow Rate(SOR)
higher than those specified in Title 30 of the Texas Administrative Code (30 TAC)§290.42(d)(10)
requires an exception.The TCEQ Technical Review and Oversight Team staff requests the
following data and operating parameters to be monitored and recorded at the specified
frequencies and reported to the TCEQ for verification that the requested clarification HDT and
SOR will not contribute to the degradation of potable water quality or quantity.To request an
exception to this rule,provide the following information to:
Technical Review and Oversight Team(MC 159)
Texas Commission on Environmental Quality
P.O.Box 13087
Austin,TX 78711-3087
o The submitted full-scale pilot study report for the requested HDT/SOR must contain
at least 30 days of data, at a minimum period of eight hours per day.The 30 days do
not need to be consecutive.
o At least one clarification unit, of each size and type, must be in operation at the
requested or lower clarification HDT,or the requested or higher clarification SOR.
o The as-built dimensions of each clarification unit must be reported.
o At least one associated mixing and flocculation unit must be in operation at a flow
rate that corresponds to the SWTP's resulting full-scale production at the requested
clarification HDT/SOR.
o The raw water turbidity,pH, temperature, and alkalinity levels must be monitored at
least once each day and at any time it is suspected that the raw water quality may
have changed.
o The pretreatment chemicals being fed and each of their dosage levels must be
reported for each eight-hour period.
o The settled water pH level and flow rate must be monitored at least once each eight-
hour shift the piloted clarification basin is in operation.
o The as-built water volumes of the associated flocculation and clarification units and
the surface area of the settling zone must be provided for each piloted clarification
unit. The corresponding HDT/SOR for each recorded flow rate must be calculated and
recorded for submittal.
s
Revised 07/25/2016
Page 1 of 2
IL CLARIFICATION UNIT HDT/SOR PILOT STUDY PROTOCOL
o The maximum raw water turbidity level during the full-scale pilot study must be
representative of the historical high observed at the existing SWTP during the last five
years.
o The settled water turbidity level during the full-scale pilot study must be monitored at
a frequency equal to the HDT of the piloted clarification units operated at the
requested clarification HDT/SOR.
o The operators must perform daily calculations to demonstrate that the required
inactivation of viruses and Giardia lamblia is being continuously accomplished. The
disinfectant residual must be monitored at the end of each disinfection zone at least
once each day during peak hourly flow rates and any time the pH or temperature of the
water changes.Additional CT calculations must be conducted every time the
disinfectant residual at the end of a disinfection zone changes, the flow rate
through a zone changes, or the pH or temperature of the water changes.
o Submit data indicating how the plant ensures that proportioned flow is delivered to each
clarification unit. If flow measuring devices are used, they must have been calibrated in
the last 12 months. If weirs are used,the level must be verified prior to beginning the
clarification HDT/SOR pilot study.
o Quality assurance and quality control data must be provided regarding monitoring
equipment calibration methods,frequencies of calibration, and analytical procedures
used.
o All collected data must be reported in comparison tables and graphs. The pilot study
report shall note and describe all changed operating parameters and discrepancies in the
collected data.
If at any time during the full-scale clarification HDT/SOR pilot study the individual
filter effluent or combined filter effluent violate any treatment technique
requirements for turbidity as specified in Section §290.111, the finished water must
not be sent to distribution.
If at any time during the full-scale clarification HDT/SOR pilot study the disinfectant
residuals are less than those required to achieve the required inactivation of Giardia
lamblia and viruses for the current water quality conditions and flow rates, the
finished water must not be sent to distribution.
Revised 07/25/2016
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