below, or both options, subparagraphs "a" and "b"
and "c" and "d". Selection of the sealed bin
method, subparagraphs "c" and "d", must be fully
justified in the appropriate DM.
In subparagraph "c" below, to fill in the blank for
cost of testing excess cement, contact the
Structures Laboratory, Concrete Technology Division,
WES.
**************************************************************************
If cement or pozzolan is to be obtained from more than one source, the
initial notification shall state the estimated amount to be obtained from
each source and the proposed schedule of shipments.
[a. Prequalified Cement Sources - Cement shall be delivered and used
directly from a mill of a producer designated as a qualified source.
Samples of cement for check testing will be taken at the project site
or concrete-producing plant by a representative of the Contracting
Officer for testing at the expense of the Government. A list of
prequalified cement sources is available from Director, U.S. Army Corps
of Engineers, Waterways Experiment Station, 3909 Halls Ferry Road,
Vicksburg, MS 39180-6199, ATTN: CEWES-SC.]
[b. Prequalified Pozzolan Sources - Pozzolan shall be delivered and
used directly from a producer designated as a qualified source.
Samples of pozzolan for check testing will be taken at the project site
by a representative of the Contracting Officer for testing at the
expense of the Government. A list of prequalified pozzolan sources is
available from the Director, U.S. Army Corps of Engineers, Waterways
Experiment Station, 3909 Halls Ferry Road, Vicksburg, MS 39180-6199,
ATTN: CEWES-SC.]
[c Nonprequalified Cement Sources - Cement, if not from a prequalified
source, will be sampled at the source and stored in sealed bins pending
completion of testing. Sampling, testing, and the shipping inspection
from the point of sampling, when the point is other than at the site of
the work, will be made by or under the supervision of the Government
and at its expense. No cement shall be used until notice has been
given by the Contracting Officer that test results are satisfactory.
In the event of failure, the cement may be resampled and tested at the
request of the Contractor, at his expense. When the point of sampling
is other than at the site of the work, the fill gates of the sampled
bin and conveyances used in shipment will be sealed under Government
supervision and kept sealed until shipment from the bin has been
completed. If tested cement is rehandled at transfer points, the extra
cost of inspection shall be at the Contractor's expense. The cost of
testing cement excess to project requirements shall also be at the
expense of the Contractor. The charges for testing cement at the
expense of the Contractor will be deducted from the payments due the
Contractor at a rate of [_____] dollars per ton of cement represented
by the tests.]
[d. Nonprequalified Pozzolan Sources - Pozzolan, if not from a
prequalified source, will be sampled at the source and stored in sealed
bins pending completion of certain tests. Pozzolan will also be
sampled at the site when determined necessary. All sampling and
testing will be by and at the expense of the Government. Release for
shipment and approval for use will be based on compliance with 7-day
SECTION 03373
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