HomeMy WebLinkAboutAmendment 2 CC WTP Scope
RRS/ab/Amendment 2 CC WTP Scope
Tt #200BPGen City of Cape Canaveral -1- 072616
AMENDMENT NO. 2 TO TETRA TECH TASK ORDER NO. 4
SCOPE OF SERVICES
CITY OF CAPE CANAVERAL
WASTEWATER TREATMENT PLANT IMPROVEMENTS
(Flow Equalization Basin Modifications for
Temporarily Removing Oxidation Ditch from Service)
CITY OF CAPE CANAVERAL PURCHASE ORDER NO. 8814
Amendment No. 2 – Construction Phase Additional Meetings and Part-Time Inspection
Services
July 26, 2016
A. PROJECT DESCRIPTION
The City of Cape Canaveral (City) owns and operates an existing wastewater treatment plant
(WWTP) that employs a 5-stage biological nutrient removal (BNR) process to provide effluent
suitable for discharge to surface water. The facility has a permitted capacity of 1.8 million gallons
per day (MGD) on an average annual daily flow (AADF) basis; however, current influent
wastewater flows are up to 1.2 MGD AADF. The WWTP includes a single oxidation ditch that is
used to provide the aerobic conditions needed to remove carbonaceous compounds and to convert
ammonia to nitrate. The oxidation ditch has been in service for approximately 30 years and has
provided reliable, efficient service. As part of a proactive maintenance effort and management of
critical assets, the City would like to drain the basin, conduct a thorough inspection of structure,
and implement some minor improvements, such as panels to minimize misting and splash
migration. In addition to having the ability to temporarily take the oxidation ditch off-line for
periodic maintenance, the City would ultimately like to have the ability to maintain treatment in
an emergency condition when the oxidation ditch is out of service due to mechanical or structural
failure.
Tetra Tech had performed preliminary design to achieve the goals stated above and documented
findings in the Preliminary Design Report (PDR) dated December 23, 2013. The PDR shows that
removing the oxidation ditch from service in parallel with providing an alternate means of aerobic
treatment can be accomplished by retrofitting the existing flow equalization basin with a diffused
aeration system. Also, the PDR indicated that permanent yard piping would be necessary along
with some temporary internal recycle pumps.
Under Amendment No. 1, the City has requested replacement of the two (2) existing aerators due
to their age and installation of new FRP covers around the aerators to prevent misting on top of
the oxidation ditch.
Subsequently, the City has requested additional engineer involvement during the construction
phase, specifically, additional meetings/site visits and one day a week construction inspection
services. This Amendment No. 2 is prepared to include these proposed changes to the project.
RRS/ab/Amendment 2 CC WTP Scope
Tt #200BPGen City of Cape Canaveral -2- 072616
Tetra Tech will provide the requested construction administration services needed to implement
the proposed changes in accordance with the current agreement with the City for continuing
services.
B. SCOPE OF SERVICES
Task 1 Preliminary Design
Phase is Complete. No Change to Scope and Budget.
Task 2 Permitting
Phase is Complete. No Change to Scope and Budget.
Task 3 Final Design
Phase is Complete. No Change to Scope and Budget.
Task 4 Bidding Services
No Change to Scope and Budget.
Task 5 Construction Administration Services
1. Due to long fabrication and shipping lead time (28 weeks) of the surface aerator gearbox,
EQ basin improvements, and the desire to drain the ditch during summer months, the
construction schedule has been increased from six (6) to sixteen (16) months. Six (6)
meetings were budgeted in the original Task Order #4 project scope. An additional ten
(10) site visits are now included in this amendment to enable monthly project status site
visits/meetings. The Contractor will be responsible for recording and distributing meeting
minutes.
2. Provide an on-site resident project representative (RPR) one day a week. The RPR and
contractor will coordinate one day a week RPR presence based on the planned work
milestones. On that day, the RPR will perform project team coordination and prepare daily
progress report. The RPR will verify quantities and observe work to be in accordance with
the contract documents.
Task 6 O&M Manual
No Change to Scope and Budget.
C. COMPENSATION SUMMARY
RRS/ab/Amendment 2 CC WTP Scope
Tt #200BPGen City of Cape Canaveral -3- 072616
The total lump sum compensation for the Scope of Services described above is summarized below.
Attachment A presents a detailed breakdown of the estimated compensation for the Scope of
Services.
Phase Total
Preliminary Design $0
Permitting $0
Final Design $0
Bidding Assistance $0
Construction Administration $128,318
O & M Manual Revision $0
Amendment No. 2 Sub-Total $128,318
Authorized T.O. No. 4 with Amendment No. 1 Project Fee $178,657
New Project Total Fee including Amendment No. 2 $306,975
D. SCHEDULE
The proposed project schedule is presented below:
Phase
Months From Notice to Proceed to
Substantial Completion
Task Duration
Construction Administration 16 Months