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Client: Las
Vegas Regional Water Pollution Control
Facility
Project: Condition Assessment of Various
Structures
And Cathodic Protection Systems
Corrosion evaluation of all major process
structures including primary and secondary
clarifiers, DAF tanks, influent pipelines,
oxygen lines, nitrification facility,
filter beds, trash racks, digesters and
many types of process pipelines located
underground. Our services have also included
recommendations for coatings for use in
many different types of structures as
well as field inspection services for
specified coating systems.
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Las
Vegas Regional Water Pollution Control
Facility. |
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Client: Union
Sanitary District
Project: Condition Assessment of Various
Structures
Conducted an overall
condition assessment of various structures
comprising the Alvarado Wastewater Treatment
Plant. This inspection included the sludge
thickeners, primary and secondary clarifiers,
aeration basins, digesters, RAS pump area,
MLSS Pipeline and the Newark Pump Station.
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Secondary
Clarifiers at Union Sanitary District. |
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Client: Delta
Diablo Sanitation District
Project: Inspect Internal Coating System
for Export Pipeline
Cathodic protection
design, monitoring and maintenance services
for all DDSD cathodic protection systems
since 1995. Types of structures include
influent pipelines, conveyance pipelines,
pumping plants and many types of process
pipelines located at the main treatment
facility in Pittsburg. Services included
surveying and adjusting cathodic protection
systems for both sacrificial and impressed
current type systems for both conveyance
pipelines and treatment plant structures.
Also, included repair and replacement
of cathodic protection systems found not
to be in working order.
All test stations and other cathodic protection
system components are currently being
provided with GPS coordinates by JDH Corrosion
Consultants, Inc. field personnel.
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Overview of the
DDSD Treatment Plant.
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Client: CCCSD
Project: Inspect Interior of Influent
Diversion Structure
Our firm conducted a visual inspection
of the interior of the old influent diversion
structure on Friday, May 23, 2003. At
the time of our inspection, the flow through
the 87” main influent pipeline had
been bypassed and therefore there was
no flow in this pipeline. There was also
no flow coming in from the 24” diameter
pipeline located on the southwest wall
of the chamber. The flows to the two 39”
pipelines, reportedly could not be shut
off, therefore, the inspection was conducted
between the hours of 4 am to 5:30 am in
the morning, which are the reported low
flow times for these pipelines. During
the time of our inspection there was no
flow coming in from the 39” diameter
pipeline in the southwest side of the
chamber and about 3 to 4 inches coming
in from the 39” diameter pipeline
entering on the southeast side of the
chamber.
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Tripod
setup for the inspection of the influent
diversion structure.
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Client: CCCSD
Project: Inspect Internal Coating System
for Export Pipeline
Our firm conducted a failure evaluation
of a 24” mortar-coated steel pipeline
for CCCSD. During our investigation we
noticed that a 4” appurtenance on
the mortar-coated steel pipeline was never
covered with mortar. Upon further inspection
it was found that the carbon steel nuts
on the flange bolts for this appurtenance
had failed as a result of galvanic corrosion
caused by the failure to coat this appurtenance
in mortar.
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Corroded nut on 24” mortar-coated
steel pipeline.
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