This powerpoint presentation begins by providing a brief overview of the Seattle area regional water system. The primary treated water quality
improvement objectives included the following:
Disinfection
- 3-log Cryptosporidium,
4-log Giardia,
5-log Virus; and,
Taste/Odor
- Reduce Flavor Profile Analysis number to 3 or less. Seattle's Design-Build-Operate (DBO) project philosophy is presented, along with a DBO service agreement with
CH2M HILL signed on April 30, 2001 to
design, secure all permits, and construct
the 180-mgd Cedar Water Treatment
Facilities in 30 months; and, to
operate and maintain the facilities for a
15-year period, with two optional 5-year
renewal periods. A unique ozone/UV treatment process was
developed to achieve primary water
quality improvement objectives, along with an integrated supervisory control and data acquisition (SCADA)
system that was developed by a joint
engineering/operations team. The Cedar WTPs were
successfully placed into service
on schedule in the fall of 2004. Topics covered include: key O&M agreement provisions; continuous water quality
monitoring and control relative to
contract requirements was provided by SCADA; 2007 compliance with disinfection; finished water taste/odor
dramatically improved; O&M agreement cost considerations; liquidated damages
included to drive meeting quantity
and quality requirements; incentive payments
for superior performance; productivity adjustments incentivize
efficient operation; productivity adjustments for power
cost continue to be a challenge; chemical productivity cost
adjustment has improved; environmental monitoring
and reporting to King County is
another contract requirement; long-term maintenance provisions are
a key aspect of the service agreement; DBO approach clearly resulted
in economical O&M cost; and, the Cedar DBO
project in retrospect. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 2.5 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 41 |
| Published : | 11/01/2008 |
