Project 161 - Agenda Staff Reports - 2002-04-24 7 o
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an Independent SpeciaUDistrict
Memorandum
To: Board of Directors
From: Rob Hamers, Manager/District Engineer
Date: April 24 2002
Subject: Budget Adjustment— Project#161 Water Services for Pump Stations
The purpose of the project is to provide a source of running water at the 11 largest
pumping stations Running water provides an immediate remedy for chemical spills
and allows a low-pressure hose down of the pumping station interior
The original budget for the project has an estimated construction cost of $50 000
When the project was in the design phase, additional items were added to the project
scope that caused an increase in costs above the original estimate
Both the Mesa Consolidated Water District and the Irvine Ranch Water District
charged inspection fees to inspect the water service installation. Services such as
these are routinely waived. The City of Costa Mesa required all the backflow devices
to be covered with an imitation rock for pedestrian safety and aesthetic purposes.
The District field crews revised their connection requirements to facilitate an easier
connection to the water line. For these and other reasons, the construction budget
requires an increase to cover the construction of the water services.
The result of these additional requirements is the need to transfer $50 000 into the
construction budget. The proposed source of the available funds is Project #135
which is closed and has a balance in excess of $135 000
Therefore, it is recommended that $50 000 be transferred from Project #135 to
Project #161 and the remaining balance in Project #135 be transferred to the Capital
Replacement Reserve
Serving our community s solid waste and sewer collection needs
PROJECT 1112100-161
CONSTRUCT WATER SERVICE TO PUMPING STATIONS
The District's number one priority at all times is worker safety This was the reason the District
adopted a policy for converting the District's pumping stations from a wet well dry well design to
a submersible design whereby daily checking could be done from the street surface rather than
descending a 20 foot vertical ladder
The old pumping station design was also considered a confined space by OSHA which necessitates
a three man crew and comprehensive safety equipment and techniques for entering the stations.
Now a single worker can check the majority of the stations easily since the electrical controls and
monitoring equipment is located above ground and operation of the pumps can also be observed
from street level. For the remaining wet well dry well stations (which will be abandoned in the
future as part of a combination project with the County Sanitation Districts of Orange County)
District workers have been properly trained and certified through OSHA.
As an additional safety precaution,the availability of a running fresh water supply is desired at the
11 largest pumping stations. At a number of these stations hydrogen peroxide and other chemicals
are used to prevent odors and grease build-up. The availability of running fresh water will allow
immediate wash down in the event workers come into contact with any chemicals. Currently the
District trucks are equipped with water jugs, however, running water is much more effective.
Four of the stations are served by Irvine Ranch Water District and seven are served by Mesa
Consolidated Water District. The Sanitary District will prepare plans showing the installation of
11 water services and meters meeting the approval of the water agency
Proposed Budget
Design $ 7 500
Construction 50 000.
Inspection 7,500
Contingencies 5 000
TOTAL $70,000