HomeMy WebLinkAboutWinzler & Kelly 2008-10-04; Amendment 1 2010-10-04'W"W WINZLER(S;TKELLY Attachment #
Ref: 02502-08-002
October 1, 2010
Tim Eriksen
Director of Public Works/City Engineer
Ukiah Utilities
411 West Clay Street
Ukiah, CA 95482-5400
Re: Proposal to prepare Nitrate Engineering Study - Amendment No. 1
Dear Tim:
This letter is in response to your request for a scope and fee proposal for the referenced study. It is our
understanding that the compliance schedule within the City's National Pollutant Discharge Elimination
System (NPDES) permit requires a Nitrate Engineering Study for the Wastewater Treatment Facility
(WWTF) to be submitted before October 1, 2010. The study is to include:
1. Russian River nitrate analysis
2. New WWTF evaluation
3. New WWTF operation modifications evaluation
4. New WWTF alternative analysis
5. Mixing Zone Study
From discussions with WWTF staff, we understand also that item 1 - the Russian River nitrate analysis has
been initiated by the WWTF staff with the monitoring of nitrate levels upstream and downstream of the
discharge point. We understand that staff has collected effluent samples in accordance with the nitrate
monitoring plan beginning July 1, 2009, and that this data collection satisfies the intent of item 2 - the New
WWTF evaluation. The facility improvements have been completed as of the summer of 2009. Since the
anticipated discharge limit of nitrate (10 mg/1) has been attained during periods of discharge, it is believed
that Items 3 and 4 are not necessary to complete. We understand also that item 5 - the mixing zone study
will not be necessary since the discharge has met the anticipated nitrate limit (10 mg/1).
Because our original proposal (submitted on August 17, 2010) has not yet been accepted by the City, the
October 1, 2010 deadline cannot be achieved. Therefore, an extension of the study submission deadline
needs to be requested of the board. An extension of six weeks would be required. The work associated with
requesting this extension will be included with the first task.
Based on our discussions with WWTP staff, we recommend the following scope of services to complete the
Work Plan:
♦ 495 Tesconi Circle, Santa Rosa, CA 95401-4696
tel 707.523.1010 fax 707.527.8679
www.w-and-k.com
WINZLER4S7-KELLY
Mr. Tim Eriksen
October 1, 2010
Page 2
SCOPE OF SERVICES
We propose to complete the following tasks:
1. Contact the Northcoast Regional Water Quality Control Board (NCRWQCB) - Winzler & Kelly will
contact the NCRWQCB to request a revised study submission date and to confirm the understanding
of the scope of work necessary to satisfy the order in relation to the nitrate engineering study.
2. Collation of Acquired Information - Winzler & Kelly will review all of the data obtained by the
WWTF staff including nitrate sampling analysis, flow data, and river monitoring data.
3. Data Analysis - Winzler & Kelly will perform data analysis for the nitrate engineering study
including evaluation of nitrate discharge compliance and a nitrate concentration balance of the river
sampling data.
4. Draft Report - Winzler & Kelly will develop a draft report and submit to the WWTF staff for
review.
5. Final Report - Winzler & Kelly will review and finalize the report based on comments from the City
staff and submit to the NCRWQCB for review.
If additional work is necessary to satisfy the compliance order as determined by the discussions the
NCRWQCCB, and additional task order could be negotiated with the City.
ENGINEERING FEE
Winzler & Kelly can provide the above described scope of services for a fixed fee of $9,950 based on our
current fee schedule. Services not included in this proposal will be provided on a time-and-materials basis or
by a negotiated fee.
SCHEDULE
We propose to begin work immediately upon receipt of the signed Amendment No. 1. The first task will be
to get the board to authorize a later submittal date. Assuming a 6 week extension can be obtained, data will
be collected by the WWTF personnel and we propose to complete the draft report by November 1, 2010 so
that comments can be obtained from staff for finalization and submission of report to the NCRWQCB by
November 15, 2010.
If you have any questions please don't hesitate to call me.
Sincerely,
WINZLER & KELLY
Dave Coleman, P.E.
Project Manager
Attachment - Amendment No. 1
W&K Project No
igr WINZLERcSzKELLY
AMENDMENT TO
AGREEMENT BETWEEN CLIENT AND CONSULTANT
02502-08-002
Amendment No. 1 to Agreement dated October 4, 2008 between Winzler & Kelly (Consultant) and City of Ukiah
(Client).
Project: Nitrate Study Work Plan.
Client hereby requests and authorizes Consultant to perform additional and/or revised services as set forth in this
Amendment.
Scope of services as set forth below or in specified attachment(s).
See attached Scope of Services.
Terms of compensation as set forth below or in specified attachment(s).
Time and Materials basis not to exceed $9,950.00.
All provisions specified in the original Agreement dated October 4, 2008 are in effect. No other agreements,
guarantees, or warranties are in effect.
IN WITNESS WHEREOF, the parties hereby execute this amendment upon the terms and conditions stated above.
Client Citv of Uki
By ~1li~oZC t
Print Name i rn r t K s C~c'
Titles \ ) i r-Pr 1,%r" C., LI,r. VV
20
Consultant wffriz ere
X
By
Print Name Alex J. Culick
Original Agreement $3000.00
Amendment No. 1 $9,950.00
TOTAL $121950.00
Rev. 5/06