Task Order No. 10162e with CH2M Hill Engineering for WWTP Turbo Blower Installation Controls SystemTASK ORDER NO. 10162e
Pursuant to the
MASTER AGREEMENT FOR PROFESSIONAL SERVICES
BETWEEN
CITY ®F MERI®IAN (®WNER) AN® CH2M HILL ENGINEERING (ENGINEER)
This Task Order is made this 7th day of August, 2012 and entered into by and between the City
of Meridian, a municipal corporation organized under the laws of the State of Idaho, hereinafter
referred to as "City", and accepted by (CH2M HILL ENGINEERING), hereinafter referred to as
"Engineer" pursuant to the mutual promises, covenant and conditions contained in the Master
Agreement (Category 7a) between the above mentioned parties dated April 10, 2010. The
Project Name for this Task Order 10162e is as follows:
CITY ®F MERI®IAN
I
J T I
The City of Meridian is upgrading two of the three existing constant speed aeration blowers at
the wastewater treatment plant for improved operating efficiency. The two constant speed
blowers are being replaced with two new K-Turbo high speed turbo blowers. CH2M HILL
previously completed preparation of the design and construction bidding documents in support
of this blower upgrade project, and is currently providing Services During Construction and
Control System Implementation Services.
Based on CH2M HILL's recent experience with the installation of K-Turbo blowers in other
wastewater treatment plants in the Pacific Northwest, it is anticipated that the new blower
operation will be more reliable if new airflow and dissolved oxygen (DO) control strategies are
integrated with the new blower and header pressure control schemes. As a result, the City has
elected to add basin airflow and DO control features to the current control system scope of
work. This project will also advance the City's ongoing SCADA Master Plan project by
implementing a new Allen Bradley/ControlLogix PLC for automated monitoring and control of
the new aeration functions.
Task Order 10162e WWTP Turbo Blower Installation Controls System Page 1 of 5
CH2M HILL ENGINEERING
Task 1: Add ®® and air flow control.
Task ®escription:
Provide PLC and HMI programming to add new DO and airflow control functions for all
four aeration basins.
Add new control logic to automate opening and closing of the existing blower building
louvers during turbo blower starting and stopping.
Provide site acceptance testing services to confirm that the new automated monitoring
and control functions operate as outlined in the written loop descriptions. CH2M HILL's
planned approach is to migrate airflow and DO control functions for one basin, then to
duplicate that effort for the other 3 basins (one at a time) once the first basin's loops are
confirmed and tuned. After all basin airflow/DO loops are migrated to the new
ControlLogix PLC, CH2M HILL will work with the new turbo blower manufacturer's
representative to test the blowers' hardwired automated monitoring and control
interfaces.
Once manufacturer's testing is completed, CH2M HILL will finalize the blower and
header pressure monitoring and control functions.
®eliverables:
Required programming and acceptance testing for DO and air flow control will be incorporated
into the previously-authorized deliverables for Control System Implementation Services, which
include:
® Final PLC program
® Final Wonderware Intouch application
® Signed Software Function Test confirming operational status of Integration Services.
Assumptions•
® This work will be based on the written loop descriptions transmitted to the City for
review on April 4, 2012 and the draft HMI graphics transmitted to the City for review on
April 5, 2012.
® 200 hour allowance on-site for startup, including blower testing with the manufacturer.
® Air flow control for each basin will be provided by adjusting the position of an existing
dedicated flow control valve.
® Each basin has two existing DO probes. DO control in each basin will be based on the
measured dissolved oxygen from one of the existing DO probes. The second DO
probe's input will be used for monitoring only.
® All air flow control valves, air flowmeters, and DO probes are calibrated and functioning
properly, as the responsibility of the City.
® This work does not include new field instrumentation or modifications to existing field
instruments.
Task Order 10162e WWTP Turbo Blower Installation Controls System Page 2 of 5
CH2M HILL ENGINEERING
Task 2: Addition of ControlLogix PLC Panel
Task ®escription:
® Provide panel design for a new Allen-Bradley ControlLogix PLC (processor rack with no
I/O modules). The new ControlLogix PLC will be used to provide automated monitoring
and control functions for the blowers, blower header pressure control, aeration basin
airflow control, and aeration basin DO control using I/O connected to the blower
building's existing Allen-Bradley SLC PLC system.
® Provide up to 12 hours of engineering labor for review of panel fabricator's control panel
submittals.
® Implementation of the new ControlLogix PLC will advance one of Meridian's SCADA
Master Plan recommendations, and will allow CH2M HILL to perform programming
using logical functions blocks and sequencing implemented and tested on other recent
K-Turbo blower automation projects. The approach will reduce the amount of future re-
programming and re-testing required when Meridian migrates the blower building
processes from SLC to ControlLogix.
® The work will require minor modification to the existing Allen-Bradley SLC control logic
to dissociate the SLC I/O from the existing control logic and associated it with the new
ControlLogix PLC's programmed functions.
®eliverables:
Control panel design drawings and panel fabrication technical specification for one wall-
mounted NEMA 12 panel containing a new Allen-Bradley ControlLogix PLC consisting
of 4-slot I/O rack, ControlLogix PLC processor, non-redundant power supply, and
Ethernet module. The panel will also contain an Ethernet switch for connection of the
ControlLogix PLC to the existing plant control system network.
Assumptions:
® The City does not need an electrical design for panel installation. We have not included
design of the new power/communication or panel installation details.
® CH2MHILL's scope includes development of one technical specification for fabrication
of the control panel. Front end specifications will be provided by the City.
® CH2MHILL has not included scope for assistance with bid preparation or evaluation.
® The new Allen-Bradley PLC components include the following:
o One (1) 4-slot ControlLogix PLC I/O chassis, 1756-A4
o One (1) ControlLogix processor, 1756-L73
o One (1)rack-mounted ControlLogix Ethernet module, 1756-EN2T
o One (1) ControlLogix non-redundant power supply, 1756-PA72
® The new ControlLogix PLC will monitor and control the existing SLC I/O via an Ethernet
connection. No ControlLogix I/O is to be provided.
® This scope of work does not include addition of new Allen-Bradley SLC components.
® The panel, including any necessary conduit and wiring required for power and
communication, will be installed by a subcontractor hired directly by the City.
Task Order 10162e WWTP Turbo Blower Installation Controls System Page 3 of 5
CH2M HILL ENGINEERING
The estimated fee is based on the following maximum I/O counts:
0 14 new hardwired I/O points from the two new turbo blowers
o Up to 5 existing hardwired I/O points associated with the remaining existing
constant speed blower
0 1 existing hardwired analog input for blower header pressure
0 8 existing hardwired analog inputs for aeration basin dissolved oxygen (two
inputs per basin)
0 4 existing hardwired analog inputs for aeration airflow (one input per basin)
o Up to 20 existing hardwired I/O points for basin air flow control valve monitoring
and control (one valve per basin, five I/O points per valve)
Witnessed factory testing is not required for this panel.
As-built control panel drawings will be provided by the City's panel fabricator. We have
not included labor for as-built updates to the control panel drawings.
Anticipated Schedule:
The following durations are from notice-to-proceed:
® 45 days for design and fabrication of the new aeration PLC panel.
® Two weeks for installation of the new control panel by the City's subcontractor.
• 3 months after panel installation to complete testing of the automated functions.
The following schedule is based on a Notice to Proceed (NTP) from the City by August 8, 2012
and resulting in the scope of work being completed by November 15, 2012. A NTP issued on
a different date will change the schedule accordingly.
COMPENSATION AND COMPLETION SCHEDULE
Task Description Due Date Compensation
1 Dissolved Oxygen and Air Flow Control Programming 11/15/12 $52,100
2 ControlLogix PLC Panel Design and Programming 11/15/12 ^ $18,000
Expenses Travel -Air and per diem (max of nine (9) trips to Meridian
and thirty-nine (39) days onsite 11 /15/12 $10,950
TASK ORDER TOTAL $81,050.00
The Not-To-Exceed amount to complete all services listed above for this Task Order No.
10162e is eighty one thousand fifty dollars ($81,050.00). No compensation will be paid over
the Not-to-Exceed amount without prior written approval by the City in the form of a Change
Task Order 10162e WWTP Turbo Blower Installation Controls System Page 4 of 5
CH2M HILL ENGINEERING
Order. The hourly rates for services and direct expenses are per the Master Agreement (by
this reference made a part hereof) and will be the basis far any additions and/nr deletions in
services rendered. Travel and meals are excluded from this Task Order unless explicitly listed
in the Scope of Services AND Payment Schedule.
nN~,i...~~,.....~ .....,.._. _
„~tPT~'U'4 UGU.._
Attest: - ~ ~~
~~'
~-- ~ _ ~
JAYCE °: OL A ,CITY CLERK
Purchasing Approval
,f r 1
KEIT ~ ATTS, Purchasing Manager
City Project Manager
W REN STEWART, Engi Bering Manager
Dated: ~~ I
Task Order 10162e WW1~P Turbo Bfowet Installation Controls System Page 5 of 5
r,H2M HILL ENGINEEFING