WA9302A-CS 970527............................................. 0
CONSULTI;G ENGINEERS
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n I 21 204 one 214 361-7
ROSS L. JACOBS, P.E.
RONALD V. CONWAY, P.E.
JOHN W. BIRKHOFF, P.E.
JOE R. CAaTEa, P.~. May 27, 1997,
GARY C. HENDRICKS, P.E. ~" .2 4~' I~.-: O 0 ~-
,. c. F,NKLEA...E. Cr S ~. 7_ I ] L
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Mr. Kenneth M. Griffin, P.E. I~,' OO f.; ~ {~
City of Coppell ' (~)
Post Office Box 478 Lt~'~_el I. 7-.3
coppell, Texas 75019 05 ho{ I ~'
Re: Village Parkway Pump Station A~ tdition ' '
SCADA System Change Order No. 2 & 5
Final Inspection
Dear Mr. Griffin:
A final inspection of the Village Parkway Pump Station Addition, SCADA System Improvements as covered
by Change Orders No. 2 and 5 to your contract with North Texas Municipal Construction Company, Inc. was
conducted on Friday, May 23, 1997. In attendance were:
Mr. Ma. Cast, City of Coppen
Mr. Larry Davis, City of Coppell
Mr. Mike Daigre, North Texas Municipal Construction Co.
Mr. Steve Baker, G.E. Team Controls
Mr. Joe Gibson, G.E. Team Controls
Mr. Gary Hendricks, P.E., Shimek, Jacobs & Finklea
In general, the SCADA System was found to be substantially complete, stable, and in good working order.
With the exception of the items listed below, Mr. Cast indicated the SCADA System appeared reliable and,
generally ready for service.
Please refer the attached Exhibit "B" of Change Order No. 2. This I/O Recap formed the basis of the checklist
for the walk through. Following is the "punch list" of items found in need of completion or correction:
1. Confirm and or explain the "Entry Switch" discrete input at all 5 RTU sites.
2. Although the Chlorine Scrubber is activated when called by the gas leak monitor, the scrubbers status on
the SCADA screen does not respond.
3. The chlorine feed rate does not appear to be correct
4. The ammonia feed rate is not shown
5. The control button for the C12 and NH3 solution lines (FCV-73A, FCV-73B, FCV-74A, FCV-74B),
appears to be mislabeled. Switch the "Suction" and "Influent" labels on the control button.
Mr. Kenneth M. Griffin, P.E.
City of Coppell
May 27, 1997
Page No. 2
6. When control valve FCV-8 is closed, all CI2 and NH3 solution lines should turn gray on the screen
indicating the "off" position for the disinfection system.
7. On the Village Parkway Pump Station screen, the influent piping should turn blue when Dallas Flow is on.
8. On the Village Parkway Pump Station screen, the pump discharge piping should turn blue when the pump
is on.
9. The City has requested that the "PC Anywhere" program be safeguarded so that it cannot be accidentally
turned off by the SCADA System operator.
10. Additional training hours remain. Training schedules should be coordinated with Mr. Matt Cast. Focus of
additional training should be on the level controls at the lift stations and the operation and use of "Tool
Box".
11. We have reviewed and marked-up the screen print-outs. Corrections required are noted on the attached
mark-ups.
12. A print-out of the SCADA System reports was not available at the walk though. Team expected that work
to be completed by May 281h or 291h. We will review the report format once it is available.
13. There is still a question concerning pump rotation. This needs to be clarified with Ted Dutt at the City.
14. The City reported pumps 2 & 3 continue to show high temperature reading. This may be due to the "pony
boards" installed by Team Controls.
15. Registration and final delivery of software and hardware to the City has not yet occurred.
16. The City has requested a schedule of value for the software and hardware components of the system.
By copy of this letter, we are requesting that G.E. Team Controls provide the City with a schedule for
completion of the items noted above.
In addition to the above listed items, work included in this contract for the future elevated storage tank
number 2 is obviously not complete. The SCADA software has been programmed for the future tank, but the
system hardware included in the change order is not installed at this time. At this stage we see three viable
options for this element of the project:
1. Leave the SCADA portion of the contract open and have G.E. Team Controls complete the installation and
connections once the future elevated tank is in service.
Advantages: The City is assured the equipment, installation and operation is consistent with the
remainder of the system.
Disadvantages: The contract remains open for a minimum of 18 months. Issues related to bonding,
insurance and retainage complicate this option. As a reminder, G.E. Team Controls are
subcontractors on this project. Bonding and insurance are provided by the general
contractor.
2. Have G.E. Team Controls verify the working condition of the RTU, radio and antenna. Take delivery of
the equipment. Execute a change order to remove the labor cost associated with the installation of the
equipment. Include the installation of the City owned and furnished equipment in the elevated storage
tank project.
Advantages: The City is assured the equipment is consistent with the remainder of the system. The
SCADA contract can be closed.
Disadvantages: The installation of the City owned and furnished equipment may be by another
SCADA contractor. City owned and furnished equipment can complicate solutions if
or when the system does not work as intended.
J:\coppell\94156\c~sc_final.doc
Mr. Kenneth M. Griffin, P.E. ~' i~
City of Coppell
May 27, 1997
Page No. 3
3. Eliminate the hardware and installation associated with this portion of the contract. Include the furnishing
and installation of compatible equipment in the elevated storage tank contract.
Advantages: The SCADA contract can be closed with the execution of a change order.
Disadvantages: The City cannot be certain the exact same equipment will be furnished with the tank
project nor that the tank contractor' s SCADA subcontractor can provide the proper
interface to the existing system. This problem can be resolved by specifying the
acceptable SCADA contractor in the elevated storage tank bid documents and
providing for a bid allowance for the SCADA work.
We recommend the City pursue the first option listed as it appears to provide for the most consistent
installation of the system. If that option is not available, then we recommend option 3 be further evaluated.
We are available to discuss this project further at your convenience.
S~ncerel yo
Enclosures
cc: Mr. Matt Cast
Mr. Larry. Davis
North Texas Municipal Construction Co., Inc.
G.E. Team Controls, Inc.
JAcoppelt\94156\c~sc_final.doc
* CITY OF COPPELL
SCADA SYSTEM
IIO RECAP
EXHIBIT "B"
DRIVER TO COM-
(SCADA SERVER LOCATION) ~ CONTROL (1) DISCH PRESSUFt~ MUNICATE WITH
~(~6B2 (8) SPARE (1) DISCH FLOW,/ WESTH. IQ-1000
(6) PUMP HOA GSR LEVEL DEVICES.
STATUS ~ ~
(1) AMMONIA CBK ~ (1) CL2 SCALE .
(1) CL2 LBK (1) CL2 A~LYZER
' SPARE
(32) TOTAL (16) TOTAL (16) TOTAL (4) TOTAL
2 EXISTING EST (1) POWER FA~L ~ (1) VALE ~C~ (1) EST L~EL ~ FUTURE
~LVE (1) CL2 ANALYZER
(2) SPARE
(8) SPARE (4) TOTAL (2) TOTAL ;UTURE
(1) POWER FAIL (1) VALVE OPEN (1) EST L~EL FUTURE
(1) VALVE CLOSE (1) CL2 ANALYZER
(2) SPARE
~~ CI ~T (4}SPARE
(8) SPARE (4) TOTAL (2) TOTAL FUTURE
4 SANDY ~KE (1) POWER FAIL~ (3) PUMP CONTROLS(I) W~ LEL ~ FUTURE 1> N~ ULTRA-
LIFT STATION ~/(1) SPARE (1) SPARE SONIC LIT WILL
? BE PROVIDED
(3) PU~ STATUS
(1) D~ HI L~EL ~
(1) W~ HI L~ELY
(1) SPARE
(8) TOTAL (4) TOTAL (2) TOTAL FUTURE
5 DE FOREST (1) POWER FAIL ~ (3) PUMP CONTROL ~1) WA~ L~EL / FUTURE 1 > N~ ULTRA-
LI~ STATION (1 N ~ (1) SPARE (1) SPARE SONIC LIT WILL
~ BE PROVIDED
(3) PUMP STATUS /
(1) D~ HI L~EL ~
(1) W~ HI L~EL ~
(1) SPARE
(8) TOTAL (4) TOTAL (2) TOTAL FUTURE
COPPE~.XLS Page 1 ' 711