Port-Wide Sewer System Management Plan(SSMP) - Port of Oakland

Table 9.5 High Priority Improvements Summary
Table 9.5 Port-Wide Sewer System Management Plan
Table 9.5 Port of Oakland
Capital Improv.
Improv. Proposed Length Cost (1),(2)
ID Size (ft) ($) Comments
Pipeline Capacity Improvements
P-1 15-in. 450 $145,000 Results from the capacity evaluation indicated that the existing 12-inch sewer is
unable to convey the design flow without exceeding the established flow depth
criterion. Installing new a new 15-inch diameter sewer will mitigate the capacity
deficiency.
P-2 12-in. 700 $180,000 Results from the capacity evaluation indicated that the existing 8-inch sewer is
unable to convey the design flow without exceeding the established flow depth
criterion. Installing new a new 12-inch diameter sewer will mitigate the capacity
deficiency.
Lift Station Rehabilitation and Replacement
LS-AP911P Note 3 - $350,000 Both pumps/motors experience bearing problems approximately every 2 years.
There is a significant amount of corrosion under the gas jumper, which was
installed to allow the hydrogen sulfide gas to escape the structure. The placement
of the jumper is causing the structure's lid to corrode. One of the effluent pipes
above ground and the pipes in the dry well have a large amount of noticeable
corrosion. It appears that the dry well during wet weather can fill with water, which
is causing rust buildup.
LS-AP926P Note 3 - $350,000 The structure’s lid and pipes show signs of corrosion. The lid has no vent and had
to be replaced two years ago. A vent needs to be added as the lid already shows
a significant amount of corrosion.
LS-AB148P 0.32 mgd - $644,000 Lift Station AB148P has only one operating pump, as the second pump has burnt
out. Should the remaining pump fail during a significant storm event, a SSO could
occur. In addition, the outgoing pipes and valves located in a dry pit on the side of
the pump building are severely corroded.
LS-AB663P 0.50 mgd - $725,000 This lift station consists of two submersible pumps. One pump currently runs at 65
amps, which is too high so it has been taken off line. In the past, vandals cut and
stole wire from the lift station. Repairs were subsequently made; however, the
auto control system still does not work. Because of this, O&M staff comes out
once a week to the lift station and manually turns on the one working pump until
the water level in the wet well drops to its low level.