be abandoned as specified in paragraph WELL DECOMMISSIONING/ABANDONMENT and
a new well drilled at no additional cost to the Government.
3.5.3
Test for Quality of Water
**************************************************************************
NOTE: The Post, or Resident Engineer, or the USGS
should be consulted to determine if any additions or
deletions should be made to the Water Quality
Analysis table.
**************************************************************************
When the capacity test in the test hole has been completed, and again after
the yield in the permanent well and drawdown test or capacity test have
been completed, the Contractor shall secure samples of the water in
suitable containers, and of sufficient quantity, to have bacterial,
physical, and chemical analyses made by [a recognized testing
laboratory][____], except that the bacterial analysis may be made by the
applicable State Board of Health, if desired. Water Quality Analysis shall
address each item specified in the Water Quality Analysis Table at the end
of this section. Expenses incident to these analyses shall be borne by the
Contractor and the results of the analyses shall be furnished to the
Contracting Officer. All sampling and analyses shall be performed using
EPA and State approved methods, procedures, and holding times.
3.5.4
Sand Test
As part of each capacity test, or at the end of each intermittent pumping,
a determination of the amount of sand (filter pack and/or foundation
material) a well is producing shall be performed. Prior to starting the
sand test all material shall be removed from the bottom of the tailpipe.
The Contractor shall test each well by pumping at a rate [of [_____] L/s gpm
] [sufficient to produce approximately [_____] m feet of draw-down]. After
the pump is at the desired pumping rate the flow from the discharge shall
be diverted [into a container that will collect all the sand being carried
by the water][through a Rossum Sand Tester]. Development of the well is
satisfactory if the amount of sand collected is less than 0.5 L per 100,000
L 1 pint per 25,000 gallons of water pumped at the specified rate. Upon
completion of the test the amount of sand in the tailpipe shall be
determined to verify that no material is being deposited in the bottom of
the well.
3.6
INSTALLATION OF PERMANENT PUMP
**************************************************************************
NOTE: The yearly change in the regional water table
should be determined before specifying the minimum
pump depth.
**************************************************************************
The permanent well pump shall be installed in the well at a minimum depth
of [8] [_____] m [25] [_____] feet below the maximum drawdown groundwater
level after the drawdown test has been completed. The pump shall be
secured at the required elevation as recommended by the pump manufacturer.
After installation of the pumping units and appurtenances is complete,
SECTION 02521
Page 32
Previous Page
