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USACE / NAVFAC / AFCEC / NASA
UFGS-02 32 00 (May 2010)
-----------------------Preparing Activity: USACE
Superseding
UFGS-02 32 00 (April 2006)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2016
**************************************************************************
SECTION TABLE OF CONTENTS
DIVISION 02 - EXISTING CONDITIONS
SECTION 02 32 00
SUBSURFACE DRILLING, SAMPLING, AND TESTING
05/10
PART 1
GENERAL
1.1
UNIT PRICES
1.1.1
Mobilization and Demobilization
1.1.1.1
Payment
1.1.1.2
Unit of Measure
1.1.2
Auger Boring and Sampling of Drill Holes
1.1.2.1
Payment
1.1.2.2
Measurement
1.1.2.3
Unit of Measure
1.1.3
Drive Sample Boring and Sampling
1.1.3.1
Payment
1.1.3.2
Measurement
1.1.3.3
Unit of Measure
1.1.4
Undisturbed Sample Boring and Sampling
1.1.4.1
Payment
1.1.4.2
Measurement
1.1.4.3
Unit of Measurement
1.1.5
Core Hole Overburden Drilling, Without Sampling
1.1.5.1
Payment
1.1.5.2
Measurement
1.1.5.3
Unit of Measure
1.1.6
Core Drilling, [Vertical] [Inclined] Holes
1.1.6.1
Payment
1.1.6.2
Measurement
1.1.6.3
Unit of Measure
1.1.7
Pressure Testing (Hydraulic)
1.1.7.1
Payment
1.1.7.2
Measurement
1.1.7.3
Unit of Measure
1.1.8
Test Pit Excavation
1.1.8.1
Payment
1.1.8.2
Measurement
1.1.8.3
Unit of Measure
1.1.9
Test Pit Undisturbed Sample
1.1.9.1
Payment
SECTION 02 32 00
Page 1
1.1.9.2
Measurement
1.1.9.3
Unit of Measure
1.1.10
Material for Shoring/Lining Pit Excavation
1.1.10.1
Payment
1.1.10.2
Measurement
1.1.10.3
Unit of Measure
1.1.11
Casing Left in Drill Holes
1.1.11.1
Payment
1.1.11.2
Measurement
1.1.11.3
Unit of Measure
1.2
REFERENCES
1.3
SYSTEM DESCRIPTION
1.3.1
Auger Borings and Sampling
1.3.2
Drive Sample Borings and Sampling
1.3.3
Undisturbed Sample Borings and Sampling
1.3.4
Core Drilling
1.3.5
Pressure Testing (Hydraulic)
1.3.6
Test Pit Excavation and Sampling
1.3.7
Sequencing and Scheduling
1.3.7.1
Schedule of Drilling, Sampling, and Testing
1.3.7.2
Order of Work
1.3.7.2.1
Numerical Sequence
1.3.7.2.2
Reporter
1.3.7.2.3
Government Oversight
1.4
SUBMITTALS
1.5
QUALITY ASSURANCE
1.6
DELIVERY, STORAGE, AND HANDLING
1.6.1
General
1.6.2
Undisturbed Samples
1.7
PROJECT/SITE CONDITIONS
1.7.1
Environmental Requirements
1.7.2
Field Measurements
PART 2
PRODUCTS
2.1
CONTAINERS
2.1.1
Sample Jars
2.1.2
Shipping Boxes
2.1.3
Tubes and Crates
2.1.4
Core Boxes
2.2
LABELS
2.2.1
Sample Jar Labels
2.2.2
Shipping Box Labels
2.2.3
Core Box Labels
2.3
EQUIPMENT AND SUPPLIES
2.3.1
Auger Boring and Sampling
2.3.2
Drive Sample Boring and Sampling
2.3.3
Undisturbed Sample Boring and Sampling
2.3.3.1
Sands and Cohesive Soils
2.3.3.2
Stiff and Dense Soils
2.3.4
Core Drilling
2.3.5
Pressure Testing (Hydraulic)
2.3.6
Test Pit Excavation and Sampling
PART 3
EXECUTION
3.1
MOBILIZATION AND DEMOBILIZATION
3.1.1
Mobilization
3.1.2
Demobilization
SECTION 02 32 00
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3.2
IDENTIFYING SAMPLES
3.3
AUGER BORING AND SAMPLING
3.4
DRIVE SAMPLE BORING AND SAMPLING
3.5
UNDISTURBED SAMPLE BORING AND SAMPLING
3.5.1
Procedure
3.5.2
Sealing
3.5.2.1
Alternate 1
3.5.2.2
Alternate 2
3.5.2.3
Alternate 3
3.6
CORE HOLE OVERBURDEN DRILLING
3.7
CORE DRILLING
3.7.1
Procedure
3.7.2
Arrangement of Core
3.7.3
Preservation of Core
3.7.4
Labeling, Marking and Packing Core
3.7.5
Disposition of Core
3.8
PRESSURE TESTING (HYDRAULIC)
3.9
TEST PIT EXCAVATION AND SAMPLING
3.9.1
Excavation
3.9.2
Sampling
3.9.3
Disposition of Samples
3.10
SUPPLEMENTAL [BORINGS] [PITS]
3.11
BACKFILLING
3.11.1
Drill Holes
3.11.2
Test Pits
3.12
RECORDS
ATTACHMENTS:
approximate locations of [drill holes] [test pits] [_____]
-- End of Section Table of Contents --
SECTION 02 32 00
Page 3
**************************************************************************
USACE / NAVFAC / AFCEC / NASA
UFGS-02 32 00 (May 2010)
-----------------------Preparing Activity: USACE
Superseding
UFGS-02 32 00 (April 2006)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2016
**************************************************************************
SECTION 02 32 00
SUBSURFACE DRILLING, SAMPLING, AND TESTING
05/10
**************************************************************************
NOTE: This guide specification covers the
requirements for determining the type, nature, and
characteristics of subsurface materials as they
exist to the depths and at the locations specified.
This section was originally developed for USACE
Civil Works projects.
Edit this guide specification for project specific
requirements by adding, deleting, or revising text.
For bracketed items, choose applicable items(s) or
insert appropriate information.
Remove information and requirements not required in
respective project, whether or not brackets are
present.
Comments, suggestions and recommended changes for
this guide specification are welcome and should be
submitted as a Criteria Change Request (CCR).
NOTE: TO DOWNLOAD UFGS GRAPHICS
Go to http://wbdg.org/ccb/NAVGRAPH/graphtoc.pdf.
**************************************************************************
PART 1
1.1
GENERAL
UNIT PRICES
**************************************************************************
NOTE: If Section 01 22 00.00 10 PRICE AND PAYMENT
PROCEDURES is included in the project
specifications, this paragraph title (UNIT PRICES)
should be deleted from this section and the
remaining appropriately edited subparagraphs below
should be inserted into Section 01 22 00.00 10.
**************************************************************************
Make all measurements for payment by or in the presence of the Contracting
Officer. Preserve all holes in good condition until final measurement and
until the records and samples have been examined and accepted. Payment
SECTION 02 32 00
Page 4
will be made only for drilling and pressure testing those holes or for
excavating those test pits that are included in the SCHEDULE OF DRILLING,
SAMPLING, AND TESTING, or are directed by the Contracting Officer to be so
drilled or excavated. Payment will not be made for any hole or testing for
which satisfactory records (and samples), as determined by the Contracting
Officer, are not furnished.
1.1.1
1.1.1.1
Mobilization and Demobilization
Payment
Payment will be made for costs associated with mobilization and
demobilization. Sixty percent of the Mobilization and Demobilization lump
sum price will be paid following completion of moving onto the site,
including complete assembly in working order, of all equipment necessary to
perform the required drilling, sampling, pressure-testing and test pit
excavation operations. The remaining 40 percent of the contract lump sum
price will be paid after all site restoration is completed and all
equipment has been removed from the site. No separate payment will be made
for moves between holes or test pits.
1.1.1.2
Unit of Measure
Unit of measure:
1.1.2
1.1.2.1
lump sum.
Auger Boring and Sampling of Drill Holes
Payment
Payment will be made for costs associated with Auger Boring and Sampling,
[_____] mm inch Diameter Drill Holes.
1.1.2.2
Measurement
Auger Boring and Sampling, [_____] mm inch Diameter Drill Holes will be
measured for payment to the nearest 300 mm linear foot, based upon the
linear meters feet of holes that were actually drilled through overburden
with augers in accordance with the specifications. Measurements will be
made from the original ground surface.
1.1.2.3
Unit of Measure
Unit of measure:
1.1.3
1.1.3.1
linear meter foot.
Drive Sample Boring and Sampling
Payment
Payment will be made for costs associated with Drive Sample Boring and
Sampling, - [_____] mm inch Diameter Samples.
1.1.3.2
Measurement
Drilling for drive sample boring and sampling will be measured for payment
to the nearest 300 mm linear foot, based upon the linear meters feet of
holes that were actually drilled by drive-sample-boring methods in
accordance with the specifications. Measurements will be made from the
original ground surface.
SECTION 02 32 00
Page 5
1.1.6.3
Unit of Measure
Unit of measure:
1.1.7
1.1.7.1
linear m foot.
Pressure Testing (Hydraulic)
Payment
Payment will be made for costs associated with Pressure Testing (Hydraulic).
1.1.7.2
Measurement
Pressure Testing (Hydraulic) will be measured for payment based upon the
number of hours that pressure testing (hydraulic) was actually performed at
the direction of the Contracting Officer and in accordance with the
specifications or as otherwise required. Pressure testing (hydraulic) will
be measured from the time the pressure testing is begun at the direction of
the Contracting Officer to the time of completion of the test as determined
by the Contracting Officer. Time spent in placing packer elements in the
holes, raising or lowering the packer elements from one lift to another, or
removing the packer elements from the holes and time spent in preparation
for testing will not be included.
1.1.7.3
Unit of Measure
Unit of measure:
1.1.8
1.1.8.1
hour.
Test Pit Excavation
Payment
**************************************************************************
NOTE: Delete the first bracketed option below if
the payment paragraphs are inserted in Section
01 22 00.00 10 PRICE AND PAYMENT PROCEDURES;
otherwise delete the second bracketed option.
**************************************************************************
Payment will be made for costs associated with excavating test pits in
accordance with [this section] [Section 01 22 00.00 10 PRICE AND PAYMENT
PROCEDURES].
1.1.8.2
Measurement
Test Pit Excavation will be measured for payment based upon the contract
unit price for each test pit excavated[, which includes the cost of all
shoring materials].
1.1.8.3
Unit of Measure
Unit of measure:
1.1.9
1.1.9.1
each.
Test Pit Undisturbed Sample
Payment
**************************************************************************
NOTE: Delete the first bracketed option below if
the payment paragraphs are inserted in Section
SECTION 02 32 00
Page 7
1.1.6.3
Unit of Measure
Unit of measure:
1.1.7
1.1.7.1
linear m foot.
Pressure Testing (Hydraulic)
Payment
Payment will be made for costs associated with Pressure Testing (Hydraulic).
1.1.7.2
Measurement
Pressure Testing (Hydraulic) will be measured for payment based upon the
number of hours that pressure testing (hydraulic) was actually performed at
the direction of the Contracting Officer and in accordance with the
specifications or as otherwise required. Pressure testing (hydraulic) will
be measured from the time the pressure testing is begun at the direction of
the Contracting Officer to the time of completion of the test as determined
by the Contracting Officer. Time spent in placing packer elements in the
holes, raising or lowering the packer elements from one lift to another, or
removing the packer elements from the holes and time spent in preparation
for testing will not be included.
1.1.7.3
Unit of Measure
Unit of measure:
1.1.8
1.1.8.1
hour.
Test Pit Excavation
Payment
**************************************************************************
NOTE: Delete the first bracketed option below if
the payment paragraphs are inserted in Section
01 22 00.00 10 PRICE AND PAYMENT PROCEDURES;
otherwise delete the second bracketed option.
**************************************************************************
Payment will be made for costs associated with excavating test pits in
accordance with [this section] [Section 01 22 00.00 10 PRICE AND PAYMENT
PROCEDURES].
1.1.8.2
Measurement
Test Pit Excavation will be measured for payment based upon the contract
unit price for each test pit excavated[, which includes the cost of all
shoring materials].
1.1.8.3
Unit of Measure
Unit of measure:
1.1.9
1.1.9.1
each.
Test Pit Undisturbed Sample
Payment
**************************************************************************
NOTE: Delete the first bracketed option below if
the payment paragraphs are inserted in Section
SECTION 02 32 00
Page 7
01 22 00.00 10 PRICE AND PAYMENT PROCEDURES;
otherwise delete the second bracketed option.
**************************************************************************
Payment will be made for costs associated with undisturbed sampling in a
test pit in accordance with [this section] [Section 01 22 00.00 10 PRICE
AND PAYMENT PROCEDURES].
1.1.9.2
Measurement
Test Pit Undisturbed Sample will be measured for payment based upon the
contract unit price for each sample obtained.
1.1.9.3
Unit of Measure
Unit of measure:
1.1.10
each.
Material for Shoring/Lining Pit Excavation
1.1.10.1
Payment
Payments will be made for costs associated with Shoring/Lining Test Pit
Excavations at the contract unit price for each test pit excavation.
1.1.10.2
Measurement
Material used for shoring/lining test pit excavations will be measured for
payment based upon the amount of material actually used as directed by the
Contracting Officer for shoring/lining the excavations. Material salvaged
and re-used at the direction of the Contracting Officer will be paid for at
the rate of 30 percent of the contract unit price.
1.1.10.3
Unit of Measure
Unit of measure:
1.1.11
each.
Casing Left in Drill Holes
1.1.11.1
Payment
Payment will be made for costs associated with Casing Left in Drill Holes,
[_____] mm inch Diameter.
1.1.11.2
Measurement
Casing Left in Drill Holes will be measured for payment to the nearest 300
mm foot, based upon the linear meters feet of casing actually left in the
drill holes at the direction of the Contracting Officer.
1.1.11.3
Unit of Measure
Unit of measure:
1.2
linear m foot.
REFERENCES
**************************************************************************
NOTE: This paragraph is used to list the
publications cited in the text of the guide
specification. The publications are referred to in
SECTION 02 32 00
Page 8
the text by basic designation only and listed in
this paragraph by organization, designation, date,
and title.
Use the Reference Wizard's Check Reference feature
when you add a RID outside of the Section's
Reference Article to automatically place the
reference in the Reference Article. Also use the
Reference Wizard's Check Reference feature to update
the issue dates.
References not used in the text will automatically
be deleted from this section of the project
specification when you choose to reconcile
references in the publish print process.
**************************************************************************
The publications listed below form a part of this specification to the
extent referenced. The publications are referred to within the text by the
basic designation only.
ASTM INTERNATIONAL (ASTM)
ASTM D1452
(2009) Soil Investigation and Sampling by
Auger Borings
ASTM D1586
(2011) Penetration Test and Split-Barrel
Sampling of Soils
ASTM D1587
(2008; E 2012; R 2012) Thin-Walled Tube
Sampling of Soils for Geotechnical Purposes
ASTM D2113
(2014) Rock Core Drilling and Sampling of
Rock for Site Investigation
ASTM D2487
(2011) Soils for Engineering Purposes
(Unified Soil Classification System)
ASTM D2488
(2009a) Description and Identification of
Soils (Visual-Manual Procedure)
U.S. ARMY CORPS OF ENGINEERS (USACE)
EM 1110-1-1906
1.3
(1996) Engineering and Design -- Soil
Sampling
SYSTEM DESCRIPTION
Provide the data to determine the type, nature, and characteristics of
subsurface materials and the extent and conditions of the various materials
as they exist to the depths and at the locations specified. This is to be
accomplished by means of [auger borings], [drive sample borings]
[undisturbed sample borings] [core drilling] [pressure testing] [test pits]
[_____].
1.3.1
Auger Borings and Sampling
An auger boring is any boring made in unconsolidated soils with a
conventional manually or power-driven earth auger for the purpose of
SECTION 02 32 00
Page 9
obtaining samples of subsurface materials. Auger boring and sampling shall
be performed in accordance with [Chapter [_____], EM 1110-1-1906] [
ASTM D1452], [as directed by the Contracting Officer].
1.3.2
Drive Sample Borings and Sampling
A drive sample boring is a boring made through unconsolidated or partly
consolidated sediments or decomposed rock by means of a mechanically driven
sampler. The purpose of these borings is to obtain knowledge of the
composition, the thickness, the depth, the sequence, the structure, and the
pertinent physical properties of foundation or borrow materials. Drive
sample boring and sampling shall be performed in accordance with [Chapter
[_____] of EM 1110-1-1906] [ASTM D1587] [as directed by the Contracting
Officer]. Standard Penetration Tests (SPT) shall be performed in
accordance with [Appendix [_____] of EM 1110-1-1906] [ASTM D1586].
1.3.3
Undisturbed Sample Borings and Sampling
An undisturbed sample boring is a boring made to obtain soil samples which,
when tested, will show properties as close to the in situ (in place)
properties as any sample which can be obtained. All undisturbed sampling
shall be accomplished in accordance with [Chapter [_____] of EM 1110-1-1906
] [ASTM D1587] [as directed by the Contracting Officer].
1.3.4
Core Drilling
**************************************************************************
NOTE: See TABLE 1 COMMON CORE DIAMETERS.
**************************************************************************
Core drilling shall be [_____] mm inch Diameter. Core Drilling of cores
shall be [by any approved standard and accepted method of rotary rock core
drilling that will provide continuous and complete rock cores of the
required diameter from any subsurface interval of bedrock specified for
investigation] [performed in accordance with ASTM D2113]. The method used
shall provide equally good recovery of cores from both hard and soft rocks.
1.3.5
Pressure Testing (Hydraulic)
Hydraulic pressure testing is the process of forcing water under pressure
into subsurface rock formations through pre-drilled holes for the purpose
of determining the subsurface leakage conditions and possible grouting
requirements.
1.3.6
Test Pit Excavation and Sampling
A test pit is any excavation in soil, hardpan, decomposed rock, or other
unconsolidated or partially consolidated overburden materials which has an
open cross-sectional area large enough to permit efficient excavation and
shoring/lining, engineering and geological inspection and photographing of
the subsurface soils and manual undisturbed sampling from within the test
pit. All test pits shall be excavated, dewatered (if necessary),
shored/lined and protected from surface water drainage in accordance with
all applicable Federal, State, local, Corps of Engineers, and OSHA safety
regulations.
SECTION 02 32 00
Page 10
1.3.7
Sequencing and Scheduling
1.3.7.1
Schedule of Drilling, Sampling, and Testing
Prior to starting work, submit a plan for drilling, sampling, testing, and
safety. The plan shall include, but shall not be limited to, the proposed
method of drilling and sampling including a description of the equipment
and sampling tools that will be used, a listing of any subContractors to
include a description of how the subContractors will be used and a
description of all methods and procedures that will be utilized to insure a
safe operation and to protect the environment. No work shall be performed
until this plan has been approved and no deviation from the approved plan
will be permitted without prior approval by the Contracting Officer. The
schedule of Drilling, Sampling, and Testing is [indicated.] [listed in the
following schedule:]
SCHEDULE OF DRILLING, SAMPLING AND TESTING
[HOLE
METHOD
NO.][PIT NO.]
1.3.7.2
DEPTH
(METERS)
(FEET)
VERTICAL OR
INCLINED
SPECIAL
INSTRUCTIONS
Order of Work
**************************************************************************
NOTE: Select appropriate alternative.
**************************************************************************
[The order in which the work is to be accomplished will be determined in
the field by the Contracting Officer.] [Commence operations on [Hole No.
[_____]] [Test Pit No. [_____]] [_____] and proceed so as to complete
[Holes] [Test Pit] [Nos. [_____], [_____], and [_____]] before starting
[Hole] [Test Pit] Nos. [_____] and [_____].]
[1.3.7.2.1
Numerical Sequence
It is intended that the [drilling] [test pit excavating] [_____] be
accomplished in the numerical sequence indicated in the [SCHEDULE OF
DRILLING, SAMPLING, AND TESTING shown on the drawings] [listed in paragraph
SCHEDULE OF DRILLING, SAMPLING, AND TESTING]; however, the Contracting
Officer may vary the order whenever and in whatever manner is deemed best
for accomplishing the work.
1.3.7.2.2
Reporter
Provide a qualified, licensed Geologist experienced in subsurface
exploration for each drill unit to oversee all drilling, sampling, and
field testing operations. This individual shall be responsible for the
preparation of a separate log and/or report for each boring, pressure test,
or test pit. This individual shall also be responsible for the preparation
of all soil and rock samples for delivery to the designated point.
SECTION 02 32 00
Page 11
PROJECT
[_____]
LOCATION
JAR SAMPLES FROM HOLE OR HOLES
2.2.3
Core Box Labels
Core boxes shall be identified with stenciled labels.
this label shall contain the following:
PROJECT
The information on
[_____]
HOLE NO.
BOX NO.
TOTAL NUMBER OF BOXES FOR THE HOLE
2.3
2.3.1
EQUIPMENT AND SUPPLIES
Auger Boring and Sampling
Furnish the equipment for making auger borings including, but not limited
to, standard continuous flight augers and/or standard cup-type earth
augers, similar or equal to the Iwan Auger and not less than 100 mm 4 inches
in diameter unless otherwise approved. The augers shall be completely
equipped with all the accessories necessary for boring and sampling of
overburden materials to the depths and diameters specified or shown on the
drawings.
2.3.2
Drive Sample Boring and Sampling
Furnish equipment for making drive sample borings including, but not
limited to, standard [50 mm 2-inch OD] [[_____] mm inch OD] [split barrel]
[solid barrel] drive samplers and power-driven drilling machinery of a type
or types approved by the Contracting Officer, complete with a [_____] kN
drive-hammer drive-hammer of [_____]-pound weight and all other accessories
for taking samples of all types of soils or decomposed rock at the
locations and to the depths indicated [in the SCHEDULE OF DRILLING,
SAMPLING, AND TESTING shown on the drawings] [in the schedule in paragraph
SCHEDULE OF DRILLING, SAMPLING, AND TESTING]. The drive shoe for the split
barrel samplers shall be of hardened steel and shall be replaced or
repaired when it becomes dented or distorted. Supplies shall include, but
not be limited to, all casing, drill stem, drill bits, drill fluid and
additives, pumps, and power necessary to accomplish the required boring and
sampling.
2.3.3
Undisturbed Sample Boring and Sampling
Furnish equipment for making undisturbed sample borings including, but not
limited to, power-driven drilling machinery of an approved type or types
complete with the special devices and accessories enumerated and described
hereinafter. Drilling machinery shall be of the hydraulic feed type.
Supplies shall include, but not be limited to, all samplers, casing, drill
stem, drill bits, drill fluid and additives, pumps, and power necessary to
accomplish the required boring and sampling. Drill casing, if used, shall
SECTION 02 32 00
Page 16
be of such minimum inside diameter as to allow use of the selected sampler.
2.3.3.1
Sands and Cohesive Soils
The sampling device used to sample fine to medium grain sands and cohesive
soils shall be a fixed or stationary piston type that uses a [75-mm 3-inch
] [125-mm 5-inch] diameter thin wall Shelby tube. [Subject to the approval
of the Contracting Officer, floating or free piston and non-piston type
samplers may be used provided adequate means, such as check valve or vacuum
system, are provided to prevent loss of samples.]
2.3.3.2
Stiff and Dense Soils
The sampling device for obtaining samples of stiff and dense soils shall be
similar or equal to a Denison double tube, swivel head core barrel, or a
Pitcher sampler and must be approved by the Contracting Officer prior to
use.
2.3.4
Core Drilling
**************************************************************************
NOTE: See TABLE 1 COMMON CORE DIAMETERS.
**************************************************************************
Core drilling shall be [_____] mm inch Diameter Core. Furnish equipment
for core drilling including core-drilling machinery of a type or types
approved by the Contracting Officer, complete with all the accessories
needed to take continuous rock cores of a diameter consistent with bit size
to the depths specified. Use, as a minimum, a standard ball-bearing,
swivel-head, double-tube core barrel, or equivalent. The capacity of the
core barrel shall not exceed 3.2 m 10.5 feet of core. Supplies for core
drilling shall include, but not be limited to, all casing, drill rods, core
barrels, coring bits, piping, pumps, water, tools, and power required for
drilling and all boxes and containers required for core samples. Selection
of the type of bit shall be at the Contractor's discretion provided that
the selected bit produces high quality rock core (see paragraph
SUPPLEMENTAL [BORINGS] [PITS]).[ Drilling equipment shall be capable of
drilling inclined as well as vertical core holes as specified.]
2.3.5
Pressure Testing (Hydraulic)
Furnish pressure testing equipment including, but not limited to, the
following: water pump with a minimum capacity of 3.15 L/second 50 gpm that
is capable of delivering a constant discharge pressure of [_____] kPa psi,
double expander packers with rubber expansion elements set [1.5] [3]
[_____] m [5] [10] [_____] feet apart with piping so arranged that water
may be admitted either below the bottom packer element or between the two
packer elements, a pressure relief valve, a pressure gage capable of
measuring water pressures to the nearest [_____] kPa psi and water meter
capable of measuring flows to the nearest [_____] 0.1 L/second gpm.
Supplies shall include, but not be limited to, all accessory valves, gages,
surge tanks, stopcocks, plugs, expanders, potable water for testing,
standby pumps, fuels, pipes, pressure hose, and tools necessary for
maintaining uninterrupted tests for each boring to be tested. The pressure
test equipment shall be configured so that the pressure gage is located at
the top of the hole, a by-pass water line and valve are located between the
pump and the gage, a flow meter is located between the by-pass and the
pressure gage, and a valve is located in the line between the flow meter
and the pressure gage. All equipment and supplies used for pressure
SECTION 02 32 00
Page 17
as outlined in paragraph DRIVE SAMPLE BORING AND SAMPLING, except that the
sampling device shall be advanced downward by one continuous, smooth drive
using the drill rig's hydraulic feed system. The hydraulic down pressure
shall be read and recorded at 150 mm 6 inch intervals during each sample
drive. The sampling device for stiff and dense soils shall be advanced by
continuous rotation of the outer cutting barrel in conjunction with use of
drill fluid circulation. Driving of any undisturbed sampling device by
means such as a drop hammer will not be permitted.
3.5.2
Sealing
3.5.2.1
Alternate 1
The soil sample obtained in a thin wall Shelby tube shall be retained in
the tube and sealed on both ends with a mechanically expandable O-ring
sealing disk of the appropriate size.
3.5.2.2
Alternate 2
The soil sample obtained in a thin wall Shelby tube shall be extruded from
the tube in the field as soon as the tube is removed from the boring by a
method approved by the Contracting Officer. The extruded soil sample shall
immediately be wrapped in [aluminum foil] [thin plastic wrap] and placed in
the center of a [metal bottomed, waxed cardboard] [plastic] tube that has a
diameter of at least 25 mm 1 inch larger than the diameter of the soil
sample, is at least 25 mm 1-inch longer than the length of the soil sample,
and has at least 13 mm 1/2-inch of congealed [50/50 mixture of paraffin and
microcrystalline wax] [microcrystalline wax] in the bottom. The annular
space between the soil sample and the tube shall be filled with [a 50/50
mixture of paraffin and microcrystalline wax] [microcrystalline wax] to a
distance of at least 13 mm 1/2-inch above the top of the soil sample.
3.5.2.3
Alternate 3
Both ends of the soil sample tube/liner obtained with a Denison barrel, or
its equivalent, shall be cleaned out to remove all drill fluid contaminated
and/or disturbed soil or to a minimum distance of 50 mm 2 inches from the
ends of the tube/liner. Any material removed that is not contaminated with
drill fluid shall be placed in a sample jar and labeled in accordance with
paragraph IDENTIFYING SAMPLES. The cleaned out ends of the sample liner
tube shall then be sealed with [a 50/50 mixture of paraffin and
microcrystalline wax] [microcrystalline wax]. A metal or wooden disk,
having a diameter just slightly smaller than the inside diameter of the
liner tube shall be inserted into the wax to a distance of 6 mm 1/4-inch
from the end of the soil sample. The wax plugs shall be flush with the
ends of the tube and a final seal consisting of a metal cap or tape shall
be placed over the ends of the tube.
3.6
CORE HOLE OVERBURDEN DRILLING
[Where samples of overburden materials are required in connection with core
drilling, the soil overburden shall be drilled and sampled in accordance
with the applicable provisions for the type of samples required.] [ Where
sampling of the overburden materials is not required, the Contractor may
utilize any method and equipment for drilling and, if required, casing
through the overburden that will not affect the quality of the core
drilling from the rock surface downward in accordance with these
specifications. The method chosen must be approved by the Contracting
Officer prior to starting any overburden drilling.]
SECTION 02 32 00
Page 20
3.7
CORE DRILLING
**************************************************************************
NOTE: See TABLE 1 COMMON CORE DIAMETERS.
**************************************************************************
Core drilling shall be [_____] mm inch Diameter Core
3.7.1
Procedure
All holes shall be drilled [vertically] [at the inclined angles [indicated
in the SCHEDULE OF DRILLING, SAMPLING, AND TESTING shown on the drawings]
[listed in paragraph SCHEDULE OF DRILLING, SAMPLING, AND TESTING]] to the
bottom elevations or depths specified unless indicated in the schedule of
borings or directed to be drilled otherwise. Off-setting of borings from
the locations specified in the Plan of Borings or as shown on the drawings,
will not be permitted without prior approval. Casing through the
overburden may be required. This casing shall be sealed in the rock at the
elevation where rock is encountered prior to commencement of rock coring.
Operate the drills at required speeds and down pressures to control drill
fluid pressures and quantities to insure maximum core quality and recovery
in whatever kind of rock is encountered. Where soft or broken rock is
encountered, reduce the length of runs to 1.5 m 5 feet or less in order to
reduce and/or keep core loss and core disturbance to the minimum. Failure
to comply with the foregoing procedures will constitute justification for
the Contracting Officer to require redrilling, at the Contractor's expense,
of any boring from which the core recovery is unsatisfactory. Exercise
particular care in recording zones of water loss, cavities, rod jerks,
rough drilling and other unusual and non-ordinary coring experiences that,
supplementing the core record, will throw light on the nature and the
extent of any fracturing or abnormalities.
3.7.2
Arrangement of Core
Core boxes shall comply with PART 2, paragraph CORE BOXES. All cores shall
be arranged neatly in the partitioned boxes in the same sequence in which
they occurred before removal from the hole. Facing the open box with the
hinged cover above and the open box below, cores shall be arranged in
descending sequence beginning at the left end of the trough nearest the
hinges and continuing in the other troughs from left to right. The highest
part of the core shall be placed in box 1, and the lower portions of the
core shall be placed in the other boxes in consecutive order.
3.7.3
Preservation of Core
Representative samples of core (not less than [_____] percent of the total
core drilled) shall be wrapped in [aluminum foil] [thin plastic wrap]
[cheese cloth] and then sealed by applying [paraffin wax] [microcrystalline
wax] [50/50 mixture of paraffin and microcrystalline wax] to the outside of
the wrapping material prior to placing the core in the core box. This
sealing process shall be accomplished as soon as possible after the core is
removed from the core barrel. The minimum length of core that is preserved
from each boring shall be no less than 2.5 times the core diameter. Spacer
blocks shall be marked and placed in the core box to show where samples
have been removed.
SECTION 02 32 00
Page 21
PROJECT
[_____]
LOCATION
JAR SAMPLES FROM HOLE OR HOLES
2.2.3
Core Box Labels
Core boxes shall be identified with stenciled labels.
this label shall contain the following:
PROJECT
The information on
[_____]
HOLE NO.
BOX NO.
TOTAL NUMBER OF BOXES FOR THE HOLE
2.3
2.3.1
EQUIPMENT AND SUPPLIES
Auger Boring and Sampling
Furnish the equipment for making auger borings including, but not limited
to, standard continuous flight augers and/or standard cup-type earth
augers, similar or equal to the Iwan Auger and not less than 100 mm 4 inches
in diameter unless otherwise approved. The augers shall be completely
equipped with all the accessories necessary for boring and sampling of
overburden materials to the depths and diameters specified or shown on the
drawings.
2.3.2
Drive Sample Boring and Sampling
Furnish equipment for making drive sample borings including, but not
limited to, standard [50 mm 2-inch OD] [[_____] mm inch OD] [split barrel]
[solid barrel] drive samplers and power-driven drilling machinery of a type
or types approved by the Contracting Officer, complete with a [_____] kN
drive-hammer drive-hammer of [_____]-pound weight and all other accessories
for taking samples of all types of soils or decomposed rock at the
locations and to the depths indicated [in the SCHEDULE OF DRILLING,
SAMPLING, AND TESTING shown on the drawings] [in the schedule in paragraph
SCHEDULE OF DRILLING, SAMPLING, AND TESTING]. The drive shoe for the split
barrel samplers shall be of hardened steel and shall be replaced or
repaired when it becomes dented or distorted. Supplies shall include, but
not be limited to, all casing, drill stem, drill bits, drill fluid and
additives, pumps, and power necessary to accomplish the required boring and
sampling.
2.3.3
Undisturbed Sample Boring and Sampling
Furnish equipment for making undisturbed sample borings including, but not
limited to, power-driven drilling machinery of an approved type or types
complete with the special devices and accessories enumerated and described
hereinafter. Drilling machinery shall be of the hydraulic feed type.
Supplies shall include, but not be limited to, all samplers, casing, drill
stem, drill bits, drill fluid and additives, pumps, and power necessary to
accomplish the required boring and sampling. Drill casing, if used, shall
SECTION 02 32 00
Page 16
be of such minimum inside diameter as to allow use of the selected sampler.
2.3.3.1
Sands and Cohesive Soils
The sampling device used to sample fine to medium grain sands and cohesive
soils shall be a fixed or stationary piston type that uses a [75-mm 3-inch
] [125-mm 5-inch] diameter thin wall Shelby tube. [Subject to the approval
of the Contracting Officer, floating or free piston and non-piston type
samplers may be used provided adequate means, such as check valve or vacuum
system, are provided to prevent loss of samples.]
2.3.3.2
Stiff and Dense Soils
The sampling device for obtaining samples of stiff and dense soils shall be
similar or equal to a Denison double tube, swivel head core barrel, or a
Pitcher sampler and must be approved by the Contracting Officer prior to
use.
2.3.4
Core Drilling
**************************************************************************
NOTE: See TABLE 1 COMMON CORE DIAMETERS.
**************************************************************************
Core drilling shall be [_____] mm inch Diameter Core. Furnish equipment
for core drilling including core-drilling machinery of a type or types
approved by the Contracting Officer, complete with all the accessories
needed to take continuous rock cores of a diameter consistent with bit size
to the depths specified. Use, as a minimum, a standard ball-bearing,
swivel-head, double-tube core barrel, or equivalent. The capacity of the
core barrel shall not exceed 3.2 m 10.5 feet of core. Supplies for core
drilling shall include, but not be limited to, all casing, drill rods, core
barrels, coring bits, piping, pumps, water, tools, and power required for
drilling and all boxes and containers required for core samples. Selection
of the type of bit shall be at the Contractor's discretion provided that
the selected bit produces high quality rock core (see paragraph
SUPPLEMENTAL [BORINGS] [PITS]).[ Drilling equipment shall be capable of
drilling inclined as well as vertical core holes as specified.]
2.3.5
Pressure Testing (Hydraulic)
Furnish pressure testing equipment including, but not limited to, the
following: water pump with a minimum capacity of 3.15 L/second 50 gpm that
is capable of delivering a constant discharge pressure of [_____] kPa psi,
double expander packers with rubber expansion elements set [1.5] [3]
[_____] m [5] [10] [_____] feet apart with piping so arranged that water
may be admitted either below the bottom packer element or between the two
packer elements, a pressure relief valve, a pressure gage capable of
measuring water pressures to the nearest [_____] kPa psi and water meter
capable of measuring flows to the nearest [_____] 0.1 L/second gpm.
Supplies shall include, but not be limited to, all accessory valves, gages,
surge tanks, stopcocks, plugs, expanders, potable water for testing,
standby pumps, fuels, pipes, pressure hose, and tools necessary for
maintaining uninterrupted tests for each boring to be tested. The pressure
test equipment shall be configured so that the pressure gage is located at
the top of the hole, a by-pass water line and valve are located between the
pump and the gage, a flow meter is located between the by-pass and the
pressure gage, and a valve is located in the line between the flow meter
and the pressure gage. All equipment and supplies used for pressure
SECTION 02 32 00
Page 17
testing shall be approved by the Contracting Officer prior to use.
2.3.6
Test Pit Excavation and Sampling
Selection of the test pit excavation, shoring/lining and dewatering (if
necessary) methods and equipment shall be at the Contractor's discretion
but must be approved by the Contracting Officer. When the number of test
pits to be excavated is large, and when adaptable mechanical trenching
equipment is available, the Contracting Officer may require that such
mechanical excavating equipment be used to expedite completion of the
pits. Supplies for obtaining undisturbed samples shall include, but not be
limited to, split metal cylinders and/or metal or wooden boxes of
acceptable sizes and types. The minimum inside dimensions of the cylinders
shall be [_____] mm inches in diameter by [_____] mm inches in length. The
wooden boxes shall be cubic in shape with a minimum inside dimension of
[_____] mm inches. Accessories shall include, but not be limited to, a
small sample trimming shovel or spade, hatchet, trimming knife, [_____] wax
and facilities for melting and brushing same, trowels, labels, and boxes
for shipping samples. Also furnish all materials required for
shoring/lining to comply with all applicable safety regulations. The
Contracting Officer may require the Contractor to salvage and re-use this
shoring/lining material in successive test pits.
PART 3
3.1
EXECUTION
MOBILIZATION AND DEMOBILIZATION
**************************************************************************
NOTE: Delete this paragraph if Mobilization and
Demobilization is not a separate payment item.
**************************************************************************
3.1.1
Mobilization
Mobilization consists of the delivery to the site of all plant, equipment,
materials and supplies to be furnished by the Contractor, the complete
assembly in satisfactory working order of all such plant and equipment at
the jobsite and the satisfactory storage at the site of all such materials
and supplies.
3.1.2
Demobilization
Demobilization consists of the removal from the site of all plant,
equipment, materials and supplies after completion of the work and also
includes, at the direction of the Contracting Officer, the cleanup and
removal of all scrap, waste backfill material, waste drilling fluid, soil
contaminated with engine/hydraulic oil, backfilling all sumps or
excavations resulting from the operations and, in general, returning the
site as close to its original condition as possible.
3.2
IDENTIFYING SAMPLES
Sample jars, shipping boxes, and labels shall comply with PART 2,
paragraphs SAMPLE JARS, SHIPPING BOXES, and LABELS, respectively. [In
addition, a moisture proof label containing the project name, hole number
and sample number shall be placed inside the jar or this information can be
written using a waterproof pen or scribed on the jar lid.] Take all
precautions required to insure that the shipping boxes are not subjected to
rough handling or damaging environmental conditions [, and complies with
SECTION 02 32 00
Page 18
k.
Classification and description by depths of rock materials [sampled]
[or] [cored] including rock type, composition, texture, presence and
orientation of bedding, floiation, or fractures, presence of vugs or
other interstices, and the RQD for each cored interval.
l.
Indication of penetration resistance such as [drive-hammer blows given
in blows per foot for driving sample spoons and casing] [and] [the
pressure in kPa psi applied to push thin-wall or piston-type samplers].
m.
Force Weight of drive hammer.
n.
Percentage of sample or core recovered per run.
o.
Depth at which groundwater is encountered initially and when stabilized.
p.
Depths at which drill water is lost and regained and amounts.
q.
Depths at which the color of the drill water return changes.
r.
Type and weight of drill fluid.
s.
Depth of bottom of hole.
t.
Pressures employed in pressure testing.
TABLE 1 - COMMON CORE DIAMETERS
CORE DIAMETER MMINCHES
HOLE DIAMETER
MMINCHES
AWG
301.185
481.890
BWG
421.655
602.360
NWG
552.155
762.980
HWG
763.000
993.907
A
271.064
481.890
B
36.51.432
602.360
N
47.61.875
762.980
H
622.450
943.716
853.345
1234.827
Conventional Core Barrels
Wireline Core Barrels*
Large Diameter Series
SECTION 02 32 00
Page 26
TABLE 1 - COMMON CORE DIAMETERS
2-3/4" X 3-7/8"
682.690
983.875
4" X 5-1/2"
1003.970
1405.495
6" X 7-3/4"
151.65.970
1977.750
* No Industry Standard for Wireline Sizes. Diameters shown for wireline core
barrels are nominal and vary between manufacturers.
SECTION 02 32 00
Page 27
3.7
CORE DRILLING
**************************************************************************
NOTE: See TABLE 1 COMMON CORE DIAMETERS.
**************************************************************************
Core drilling shall be [_____] mm inch Diameter Core
3.7.1
Procedure
All holes shall be drilled [vertically] [at the inclined angles [indicated
in the SCHEDULE OF DRILLING, SAMPLING, AND TESTING shown on the drawings]
[listed in paragraph SCHEDULE OF DRILLING, SAMPLING, AND TESTING]] to the
bottom elevations or depths specified unless indicated in the schedule of
borings or directed to be drilled otherwise. Off-setting of borings from
the locations specified in the Plan of Borings or as shown on the drawings,
will not be permitted without prior approval. Casing through the
overburden may be required. This casing shall be sealed in the rock at the
elevation where rock is encountered prior to commencement of rock coring.
Operate the drills at required speeds and down pressures to control drill
fluid pressures and quantities to insure maximum core quality and recovery
in whatever kind of rock is encountered. Where soft or broken rock is
encountered, reduce the length of runs to 1.5 m 5 feet or less in order to
reduce and/or keep core loss and core disturbance to the minimum. Failure
to comply with the foregoing procedures will constitute justification for
the Contracting Officer to require redrilling, at the Contractor's expense,
of any boring from which the core recovery is unsatisfactory. Exercise
particular care in recording zones of water loss, cavities, rod jerks,
rough drilling and other unusual and non-ordinary coring experiences that,
supplementing the core record, will throw light on the nature and the
extent of any fracturing or abnormalities.
3.7.2
Arrangement of Core
Core boxes shall comply with PART 2, paragraph CORE BOXES. All cores shall
be arranged neatly in the partitioned boxes in the same sequence in which
they occurred before removal from the hole. Facing the open box with the
hinged cover above and the open box below, cores shall be arranged in
descending sequence beginning at the left end of the trough nearest the
hinges and continuing in the other troughs from left to right. The highest
part of the core shall be placed in box 1, and the lower portions of the
core shall be placed in the other boxes in consecutive order.
3.7.3
Preservation of Core
Representative samples of core (not less than [_____] percent of the total
core drilled) shall be wrapped in [aluminum foil] [thin plastic wrap]
[cheese cloth] and then sealed by applying [paraffin wax] [microcrystalline
wax] [50/50 mixture of paraffin and microcrystalline wax] to the outside of
the wrapping material prior to placing the core in the core box. This
sealing process shall be accomplished as soon as possible after the core is
removed from the core barrel. The minimum length of core that is preserved
from each boring shall be no less than 2.5 times the core diameter. Spacer
blocks shall be marked and placed in the core box to show where samples
have been removed.
SECTION 02 32 00
Page 21
3.7.4
Labeling, Marking and Packing Core
Stenciled labels for core boxes complying with paragraph CORE BOX LABELS
shall be placed on the inside and outside of the top cover in addition to
each end. In addition, the depths (or elevations) of each core run/pull
shall be marked with a black waterproof pen on the spacer blocks that are
placed between core pulls. When a box is full, the space between the core
and the trough sides shall be filled with finely ground vermiculite or
other packing material approved by the Contracting Officer.
3.7.5
Disposition of Core
While onsite, protect the filled core boxes from direct sunlight,
precipitation, and freezing by some form of Contracting Officer approved
shelter that allows ventilation to the boxes. Upon completion of core
drilling and sampling operations, core boxes containing cores shall be
[stored in an area provided by the Contracting Officer near the site of
drilling] [shipped or delivered to [provide address]].
3.8
PRESSURE TESTING (HYDRAULIC)
[Pressure-test each hole in [1.5] [3] [_____] m [5] [10] [_____] foot
sections commencing at the top of bedrock and progressing downward to the
bottom of the hole or to such depths as determined by the Contracting
Officer below which testing of the hole is not necessary.] [Pressure test
the bottom [1.5] [3] [_____] m [5] [10] [_____] foot section of hole
immediately after it is cored. After a [_____] m foot section is cored,
the coring equipment will be removed from the section and a single rubber
expansion packer placed at the top of the section (bottom of the previously
tested section) and the section pressure tested. After the pressure test
is completed, the packer assembly shall be removed and the next [_____] m
foot section cored and then pressure tested. This procedure shall be
continued to the bottom of the hole or to depths determined by the
Contracting Officer.] Where core data from the test holes indicate only
isolated zones that are open or fractured, pressure testing may be limited
by the Contracting Officer to these zones only. Water pressure employed
for each lift shall be determined in the field by the Contracting Officer
and shall not exceed 22.6 kPa per meter of depth one pound per square inch
per foot of depth to the upper expander and, in no case, shall the pressure
be greater than [_____] kPa psi. The pressure test will be divided into
two phases; the first phase will be a flow test which shall then be
followed by the second phase which is a duration test. In performing the
first phase, water is pumped slowly at first, and the flow then gradually
increased to the point where the predetermined maximum pressure is
maintained, by adjusting the valve on the by-pass line. The allowable
pressure shall be held for 1 minute before any readings are taken. The
volume of flow into the test section shall be measured for a period of 5
minutes during which time the pressure shall not vary by more than 34.5 kPa
5 psi. After this 5-minute test, the second phase shall be started by
closing the valve located between the flow meter and the pressure gage.
The drop in pressure is then read for a period of 5 minutes at [15] [30]
[_____]-second intervals. In some situations, such as in a very tight
formation, the Contracting Officer may eliminate phase one of the test.
The Contractor may be required to make check tests at its own expense if
the testing equipment or its assembly and arrangement are found to be
faulty during or after the testing of any holes. Record all gage and meter
readings made during a pressure test on a suitable form approved by the
Contracting Officer. A sample form is shown in FIGURE 2 - PRESSURE TEST
DATA FORM.
SECTION 02 32 00
Page 22
3.9
3.9.1
TEST PIT EXCAVATION AND SAMPLING
Excavation
The test pits shall be excavated in the order scheduled in [the SCHEDULE OF
DRILLING, SAMPLING, AND TESTING shown on the drawings] [paragraph SCHEDULE
OF DRILLING, SAMPLING, AND TESTING], and shall be excavated to depths and
dimensions indicated [in paragraph SCHEDULE OF DRILLING, SAMPLING, AND
TESTING] [on the drawings]. Become thoroughly familiar with work site and
with all available subsurface data, particularly groundwater conditions,
before excavating pits. Regardless of the method of excavation employed,
the pits shall be excavated [, dewatered] and shored/lined in conformance
with all applicable safety regulations.
3.9.2
Sampling
Obtain soil samples from each pit [at the depths/elevations indicated in
paragraph SCHEDULE OF DRILLING, SAMPLING, AND TESTING] [at depths of [_____]
m feet, [_____] m feet, and [_____] m feet,] [at depths determined by the
Contracting Officer]. A total of [_____] samples shall be obtained from
each test pit. In obtaining samples from test pits, the undisturbed in
situ (in place) natural physical and structural characteristics of the
sampled materials shall be preserved insofar as possible both while samples
are being taken and during shipment to the point of testing. In cohesive
and partially cohesive soils this may be accomplished by isolating the soil
column or cube to be sampled by gently trenching around it and
knife-trimming it to the required dimensions of the split cylinder or box.
A thin coating of melted [50/50 mixture of paraffin and
microcrystalline][microcrystalline] wax shall then be applied quickly but
gently to the sample with a paint brush to seal it against loss of
moisture. The metal or wooden sample container, with the top and bottom
removed shall then be placed over the wax coated sample such that the
sample is centered within the container and the top of the container sides
are at least 25 mm 1 inch above the top of the sample. The spaces between
the sample and the side walls of the container shall then be filled with
melted [_____] wax. After this wax has congealed, the space between the
top of the sample container sides and the top of the sample shall be filled
with [_____] wax. After this wax has congealed, it shall be trimmed so
that when the top of the sample container is installed there is no void
between the container top and the wax. After the container top is
installed, the soil column or cube shall then be cut off a few hundred mm
inches below the container, the sample and container inverted and removed
from the pit and the sample trimmed at the base so that the bottom of the
sample is at least 25 mm 1 inch below the bottom of the container. This
space shall be filled with [_____] wax and, after the wax has congealed, it
shall be trimmed so that when the bottom of the container is installed,
there shall be no void between the wax and the bottom of the container.
Where overburden materials to be sampled are only partially cohesive, it is
best not to expose the entire soil column before waxing. By exposing and
waxing small sections at a time, the sample will be subjected to less
disturbance. Where natural moisture content is an important factor, delay
shall be avoided in taking the sample in order that the natural moisture
content of the material may be retained to the fullest extent.
3.9.3
Disposition of Samples
Samples shall be packed in vermiculite or a packing material approved by
the Contracting Officer and shipped in sturdy wooden boxes of strength and
SECTION 02 32 00
Page 23
construction sufficient to guarantee against damage during shipment. Boxes
should be no larger than is required for shipping two such samples. All
sample boxes shall be marked FRAGILE-HANDLE WITH CARE and shall be
identified by labels, similar to those as specified in paragraph
IDENTIFYING SAMPLES, attached to the outside of each box. Extreme care
shall be taken to indicate the top and bottom of each sample. Avoid
exposing sealed and crated samples to precipitation and extremes of
temperature. Undisturbed samples permitted to freeze, even partially,
shall be replaced by the Contractor at its expense. Do not hold these
samples at the site for a period in excess of one week. Prior to shipment,
each sealed and boxed sample shall be checked for correct labeling.
3.10
SUPPLEMENTAL [BORINGS] [PITS]
[Borings] [Pits] that are abandoned or from which [unsatisfactory samples
or cores are obtained] [less than [_____] percent total core recovery has
been obtained, exclusive of open or filled cavities] will be supplemented
by other [borings] [pits] adjacent to the original in order that
satisfactory samples or the required information will be obtained. Actual
locations of any supplemental [borings] [pits] will be established by the
Contracting Officer. Penetration to the depth where the original was
abandoned or to the depths where unsatisfactory samples were obtained may
be made by any method selected by the Contractor that in the opinion of the
Contracting Officer will permit satisfactory completion and sampling below
the elevation where the last satisfactory sample was obtained in the
abandoned or satisfactory sampling in the reaches where satisfactory
samples were not obtained in the original [borings] [pits]. No payment
will be made for supplemental [borings] [pits] that are required to be
[drilled] [excavated] to replace [borings] [pits] that were abandoned or
from which satisfactory samples were not obtained because of mechanical
failure of drilling and sampling equipment, negligence on the part of the
Contractor, or other preventable cause for which the Contractor is
responsible except that payment will be made for acceptable portions of
these supplementary [borings] [pits] below the depths or outside the
reaches for which payment was made for the original [borings] [pits].
3.11
3.11.1
BACKFILLING
Drill Holes
Unless otherwise noted in these specifications or directed by the
Contracting Officer, all drill holes shall be backfilled and abandoned in
accordance with all Federal, State, and local laws, regulations and
ordinances. Preserve all holes in good condition until final measurement
and until the records and samples have been accepted. As a minimum, all
holes shall be grouted from the bottom of the hole to within 600 mm 2 feet
of the ground surface using a grout mixture of 23 to 30 liters six to eight
gallons of water per sack (42.6 kg) (94 pounds) of portland cement. All
grout shall be pumped through a [tremie] [_____] pipe that is inserted to
the bottom of the boring to insure that the grout fills the full extent of
the hole. The remaining ungrouted top 600 mm 2 feet of the hole shall be
backfilled with local soil and tamped. All backfilling operations shall be
performed in the presence of the Contracting Officer and, if required by
regulation, Federal, State, and local officials. No separate payment will
be made for backfilling drill holes. The cost of this work shall be
included in the drilling costs.
SECTION 02 32 00
Page 24
3.11.2
Test Pits
Backfill all test pits with local soil compacted to original densities as
directed by the Contracting Officer. No separate payment will be made for
backfilling test pits. The cost of this work shall be included in the test
pit excavation costs.
3.12
RECORDS
Submit complete, legible copies of DRILLING LOG, ENG FORM 1836 and 1836A,
and records to the Contracting Officer [upon completion of the work or at
such other time or times as directed] [within [_____] days after a [hole]
[test pit] is completed]. Keep accurate driller's logs (DRILLING LOG, ENG
FORM 1836, and 1836-A will be provided by the Contacting Officer) and
records of all work accomplished under this contract and deliver complete,
legible copies of these logs and records to the Contracting Officer [upon
completion of the work or at such other time or times as directed] [within
[_____] days after a [hole] [test pit] is completed]. All such records
shall be recorded during the actual performance of the work and shall be
preserved in good condition and order until they are delivered and
accepted. The Contracting Officer has the right to examine and review all
such records at any time prior to their delivery and has the right to
request changes to the record keeping procedure. The following information
shall be included on the logs or in the records for each [hole] [test pit]:
a.
[Hole] [Test Pit] number or designation and elevation of top of [hole]
[test pit].
b.
Driller's name and Geologist's name.
c.
Make, size, and manufacturer's model designation of [drilling,]
[sampling,] [pressure testing,] [and] [test-pit excavating] equipment.
d.
Type of [drilling,] [sampling,] [and] [pressure testing] operation by
depth.
e.
Hole diameter.
f.
Dates and time by depths when [test-pit excavation,] [ drilling,]
[sampling,] [and] [pressure testing] operations were performed.
g.
Time required for [drilling each run] [and] [pressure testing each
interval tested].
h.
Drill action, rotation speed, hydraulic pressure, water pressure, tool
drops, and any other unusual and non-ordinary experience which could
indicate the subsurface conditions encountered.
i.
Depths [at which samples or cores were recovered or attempts made to
sample or core including top and bottom depth of each run] [and] [of
each interval pressure tested].
j.
Classification or description by depths of the materials [sampled,]
[cored,] [or] [penetrated] using the Unified Soil Classification System
(ASTM D2487) and including a description of moisture conditions,
consistency and other appropriate descriptive information described in
paragraph SUPPLEMENTAL [BORINGS] [PITS] of ASTM D2488. This
classification or description shall be made immediately after the
samples or cores are retrieved.
SECTION 02 32 00
Page 25
k.
Classification and description by depths of rock materials [sampled]
[or] [cored] including rock type, composition, texture, presence and
orientation of bedding, floiation, or fractures, presence of vugs or
other interstices, and the RQD for each cored interval.
l.
Indication of penetration resistance such as [drive-hammer blows given
in blows per foot for driving sample spoons and casing] [and] [the
pressure in kPa psi applied to push thin-wall or piston-type samplers].
m.
Force Weight of drive hammer.
n.
Percentage of sample or core recovered per run.
o.
Depth at which groundwater is encountered initially and when stabilized.
p.
Depths at which drill water is lost and regained and amounts.
q.
Depths at which the color of the drill water return changes.
r.
Type and weight of drill fluid.
s.
Depth of bottom of hole.
t.
Pressures employed in pressure testing.
TABLE 1 - COMMON CORE DIAMETERS
CORE DIAMETER MMINCHES
HOLE DIAMETER
MMINCHES
AWG
301.185
481.890
BWG
421.655
602.360
NWG
552.155
762.980
HWG
763.000
993.907
A
271.064
481.890
B
36.51.432
602.360
N
47.61.875
762.980
H
622.450
943.716
853.345
1234.827
Conventional Core Barrels
Wireline Core Barrels*
Large Diameter Series
SECTION 02 32 00
Page 26
TABLE 1 - COMMON CORE DIAMETERS
2-3/4" X 3-7/8"
682.690
983.875
4" X 5-1/2"
1003.970
1405.495
6" X 7-3/4"
151.65.970
1977.750
* No Industry Standard for Wireline Sizes. Diameters shown for wireline core
barrels are nominal and vary between manufacturers.
SECTION 02 32 00
Page 27
FIGURE 2 - PRESSURE TEST DATA FORM
SHEET ____ 0F ____
DATE _____________
REPORT OF WATER PRESSURE TESTING IN CORE DRILL HOLES
DAM SITE _______________ RIVER ________________ HOLE NO. ____ RIG NO. ____
LOCATION OF HOLE _________________________________________________________
CONTRACTOR ____________________ DRILLER ___________ ELEV. TOP OF HOLE ____
DATA ON FLOW TEST
SECTION OF HOLE TESTED
TOP
BOTTOM
WATER METER READINGS
PRESSURE
DURING
TEST
START STOP
TIME TIME
TIME
MINUTES
AT
START
OF
AT
END
OF
TOTAL
WATER
USED (L)
(GAL)
(L)(GAL)
PER SEC
DEPTH ELEV DEPTH ELEV
DATA ON PRESSURE DURATION TEST
SECTION OF HOLE TESTED
TOP
DEPTH
BOTTOM
ELEV
DEPTH
GAGE PRESSURE AT TEST INTERVAL
REMARKS
ELEV
OBSERVED BY _______________________________
**************************************************************************
SECTION 02 32 00
Page 28
NOTES: Insert TYPICAL CORE BOX, FIGURE 1, after the
previous table. FIGURE 1 - TYPICAL CORE BOX, exist
as CADD files stored on
http://wbdg.org/ccb/NAVGRAPH/graphtoc.pdf.
**************************************************************************
-- End of Section --
SECTION 02 32 00
Page 29
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