INSPECTION & TEST PLAN
FOR
SITE PREPARATION, EARTH WORKS & BACKFILL
OF DUCT BANKS,CABLE TRENCHS,MANHOLES,OPEN TRENCHES, CATCH
BASINS,CULVERTS,U/G CIVIL WORKS,TANK FOUNDATIONS,SLEEPERS,LOCAL
PLATFORMS ,SUPPORT FOUNDATIONS, SHELTER & EQUIOMENT FOUNDATIONS, PITS &
PONDS,EARTH DIKES,PAVING, PATROL ROADS &FENCING WORKS
Page 1 of 17
ONTENTS
1.0
PURPOSE..................................................................................................4
2.0
SCOPE......................................................................................................4
3.0
REFERENCE DOCUMENTS..............................................................................4
4.0
LIST OF VERIFYING DOCUMENTS.....................................................................6
5.0
DEFINITIONS/ABBREVATIONS.........................................................................6
6.0
INSPECTION AND TEST PLAN..........................................................................8
Item
1.0
Control
Activity
Civil Material
Testing
Laboratory
approval
Action to be verified
Reference Document
Acceptance Criteria
 Calibration certificates
and validity
 Testing procedures and
formats
 Applicable international
standards
 Client/company
approval
 Laboratory test
equipment list and
maintenance register
 Calibration certificates
 Applicable
specifications/
standards/
Procedures (Refer
Clause 3.0 - Reference
documents)
 Testing equipment shall be
in good working condition
with valid calibration
certificates
 Testing equipment/
procedures shall be in
accordance with relevant
test standards
 Evidence of company/client
approval of proposed testing
Responsible
Party
QC
Verifying
Document
Approved
document
from
company
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Item
Control
Activity
Action to be verified
Reference Document
Acceptance Criteria
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Document
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Non
Conforman
ce Report
H
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N/A
Calibration
Certificate/
Register
H
R/A
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N/A
Drawing
Register
H
R/A
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N/A
H
S/R/A
S/R/A
H
agency
2.0
Control of
NonConforming
Products
 Non-conformance
control
Procedure(DRP001OUF-PRO-Q-000-503)
 Non-conformance
report
.

3.0
Control of
Inspection
Test
& Measurin
g
Equipment


4.0
5.0
Drawings
and
Documents
status
Site
excavated
material
approval

Review & verify validity
of calibration
certificates,
Identification
Number/Sticker
 Verify condition of the
test equipment
Review of applicable
drawings/documents
and ensure that latest
revision is available at
site
Review of work
procedures, Method
Statements, QC
Procedures and other
related documents etc.
 Verification of
laboratory test reports
for excavated material
 Excavated material in
excess of that required
for normal
embankment
construction shall be
stockpiled within the
construction limits or


Manufacturer’s data
sheet
Material & Equipment
Management Procedure
(DRP001-OUF-PRO-L000-006)
Specification for Site
Preparation, Excavation
& Backfill (DRP001OUF-SPE-C-000-500).
 List of latest revision of
applicable drawings
 IFC drawings and
Specification for Site
Preparation, Excavation
& Backfill (DRP001-OUFSPE-C-000-500)
 Project specification for
Site Preparation,
Excavation & Backfill
(DRP001-OUF-SPE-C000-500)
 IFC Drawings
 Agreed disposition action
taken
QC
 Good mechanical and
electrical condition
 Valid calibration certificate
 Conforms to Material &
Equipment Management
Procedure (DRP001-OUFPRO-L-000-006)
QC
 Complies with IFC document
register
 Complies with IFC drawings,
applicable standards and
specifications
 Excavated material shall be
stock piled and samples
shall be tested at laboratory
 Classified in accordance
with Site Preparation,
Excavation & Backfill
(DRP001-OUF-SPE-C-000500, Clause 6.1.3, 6.1.4 &
6.2) specification by testing
agency, if found suitable,
QC
QC
Laboratory
Test
Reports
for
excavated
material
Page 3 of 17
Item
Control
Activity
Action to be verified
shall be placed in a
designated spoil area
beyond the
construction limits as
specified by the
Company.
 Standard sieve
analysis in accordance
with ASTM C136,
ASTM D422, or ASTM
D1140
 Liquid and plastic limit
determination in
accordance with ASTM
D4318
 Modified Proctor Test
in accordance with
ASTM D1557 or one
Standard Proctor Test
in accordance with
ASTM D698
Reference Document
Acceptance Criteria








Responsible
Party
Verifying
Document
Intervention Points
SC
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existing excavated material
can be used.
Testing shall be carried out
for One standard sieve
analysis, one liquid and
plastic limit determination,
and one Modified Proctor
test in accordance with the
standards listed in this ITP,
every 1000m3 of fill or as
directed by the Company.
Depending on variation in
analysis, additional tests
shall be made as determined
by the Engineer / Company.
Fill and backfill material shall
not contain material larger
than 75mm and shall be free
of organic matter or any kind
of contamination or any
other unsatisfactory material.
Gypsum content for all fill
materials shall be less than
10%.
General fill material shall
comply with the requirement
of DRP001-OUF-SPE-C000-500, Clause 6.2.2.
Structural fill materials shall
comply with the requirement
of DRP001-OUF-SPE-C000-500, Clause 6.2.3
Controlled low strength
material(CLSM) shall comply
with the requirement of
DRP001-OUF-SPE-C-000500, Clause 6.2.4
The 28 days compressive
strength for controlled low
strength material shall be
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Control
Activity
Action to be verified
Reference Document
Acceptance Criteria
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Party
Intervention Points
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Document
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between 0.7 and 1.4 Mpa.
6.0
Fill material
approval
(from
supplier or
borrow pit)
 Source approval and
Verification of
laboratory test reports
for fill material
 Standard sieve
analysis in accordance
with ASTM C136,
ASTM D422, or ASTM
D1140
 Liquid and plastic limit
determination in
accordance with ASTM
D4318
 Modified Proctor Test
in accordance with
ASTM D1557 or one
Standard Proctor Test
in accordance with
ASTM D698
 Bedding & Padding
Material for UG
services
 Project specification for
Site Preparation,
Excavation & Backfill
(DRP001-OUF-SPE-C000-500)
 IFC Drawings
 Fill material shall be
obtained either from
approved supplier or borrow
pit areas
 Fill material shall be tested
and classified by testing
agency
 Fill material shall comply
with Project specification for
Site Preparation, Excavation
& Backfill (DRP001-OUFSPE-C-000-500, Clause
6.1.3 & 6.1.4 & 6.2)
 If the type, or source, of fill
material changes, the control
tests shall be performed
again with the new material.
 Testing shall be carried out
for One standard sieve
analysis, one liquid and
plastic limit determination,
and one Modified Proctor
test in accordance with the
standards listed in this ITP,
every 1000m3 of fill or as
directed by the Company.
 Depending on variation in
analysis, additional tests
shall be made as determined
by the Engineer / Company
 Fill and backfill material shall
not contain material larger
than 75mm and shall be free
of organic matter or any kind
of contamination or any
other unsatisfactory material.
QC
Laboratory
Test
Reports
for fill
material
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Item
Control
Activity
Action to be verified
Reference Document
Acceptance Criteria
Responsible
Party
Verifying
Document
Intervention Points
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 Gypsum content for all fill
materials shall be less than
10%.
 General fill material shall
comply with the requirement
of DRP001-OUF-SPE-C000-500, Clause 6.2.2.
 Structural fill materials shall
comply with the requirement
of DRP001-OUF-SPE-C000-500, Clause 6.2.3
 Controlled low strength
material(CLSM) shall comply
with the requirement of
DRP001-OUF-SPE-C-000500, Clause 6.2.4
 The 28 days’ compressive
strength for controlled low
strength material shall be
between 0.7 and 1.4 Mpa.
 Bedding and Padding
materials for US services
shall be as per IFC drawings
7.0
Inspection
of materials
used for
filling like
excavated
soil, general
fill material,
20/40mm,
2/6mm,
10/20mm
gravel,
clean sand
& structural
fill and geotextile,


Check fill material.
Storage and
preservation (e.g. long
term outdoor storage
at site)
 Material approval
request(MAR)
 Test certificates
 Material Management
Procedure (DRP001-OUFPRO-W-000-001)
 Specification for Site
Preparation, Excavation &
Backfill (DRP001-OUFSPE-C-000-500)
 IFC Drawings
 Confirm to Specification for
Site Preparation, Excavation
& Backfill (DRP001-OUFSPE-C-000-500, Clause
6.1.3 & 6.1.4 & 6.2)
 Confirms to storage and
preservation requirements
 Confirms to Material
Management Procedure
(DRP001-OUF-PRO-W-000001)
 Confirms to IFC Drawings
QC
Test
Reports
&
Material
Approved
Document
&
Notification
for material
inspection(
NFMI)
&
Material
Page 6 of 17
Item
Control
Activity
Action to be verified
Reference Document
Acceptance Criteria
Responsible
Party
Setting out
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inspection
report(MIR)
&
Pictures of
the material
HDPE liner
PVC
sleeves &
Asphalt fibre
boards
8.0
Intervention Points
Verifying
Document
 Temporary monuments
shall be provided as
part of the site
preparation works in
accordance with the
details provided on
DRP001-FED-000000C-CVL-900-1 & IFC
drawings.
 Alternative proposed
locations, if requested,
are to be indicated on
copy of drawing
DRP001-FED-000000C-CVL-900-1 by
Contractor for
Company review and
approval.
 After installation the
location and level of the
temporary monuments
shall be checked and
confirmed by a third
party surveying
contractor.
 All reference points
(e.g., property markers,
benchmarks, etc.) shall
 DRP001-OUF-SPE-C000-500
 IFC Drawings
 Tolerance for survey works
shall be as per Table-1 of
DRP001-OUF-SPE-C-000500
 DRP001-FED-000000-CCVL-900-1
 IFC Drawings
QC
ITR-C0102X
Page 7 of 17
Item
Control
Activity
Action to be verified

9.0
Site
preparation
and top soil
removal (If
applicable)



be carefully maintained
during excavation,
backfilling, compaction,
and earthwork.
If a reference point is
damaged during
performance of the
work, the reference
point shall be repaired
or replaced at the
Contractor’s expense.
Top soil stripping
activity
Grubbing
Grading
Reference Document
Acceptance Criteria
 Specification for Site
Preparation, Excavation
& Backfill (DRP001OUF-SPE-C-000-500,
Clause 6.3)
 IFC Drawings
 Stripped material shall be
disposed of to a designated
area
 Stripped material shall not
be used as Structural fill
material, under any
circumstances.
 Grubbing consists of
removal of roots prior to
excavation.
 Before any soil is removed,
the area shall be cleared of
all debris.
 Unless otherwise directed by
the Company, topsoil shall
be removed to full-depth or
as specified in the Project
specification/IFC drawings
and stockpiled for re-use.
 Reusable materials shall be
stockpiled as necessary for
the Contractor’s operations
in areas approved by the
Company.
 Stripping, grubbing and
grading shall comply with
clause 6.3 of DRP001-OUF-
Responsible
Party
Intervention Points
Verifying
Document
QC
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ITR-C0101X
&
Pictures of
the activity
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Item
Control
Activity
Action to be verified
Reference Document
Acceptance Criteria
Responsible
Party
Intervention Points
Verifying
Document
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N/A
SPE-C-000-500
 General area grading shall
be completed to within a
tolerance of ±25 mm of the
elevations shown in the
contract documents, but
shall not be uniformly high or
low.
10
UG Services
(Cables/Pipi
ng)




Trench Excavation
Pre-padding/Bedding
Post-Padding
Backfilling
 Specification for Site
Preparation, Excavation
& Backfill (DRP001FED-SPE-C-000-500)
 IFC Drawings
 ASTM D 5334
 Trench excavation
dimensions shall be as per
IFC drawings
 Lift thickness of
bedding/Padding material
shall be as per IFC
drawings.
 Compaction for Backfill of
trenches (for utility lines or
foundations) – one test for
every 50 linear feet (15 m) of
each lift where directed by
Company.
 Electrical trenches shall be
backfilled with clean sand
having thermal resistivity
value less than 2Km/Watt, till
the top of cable tiles.
 Above the cable tiles, trench
is to be backfilled with
normal excavated soil or
mixed with imported fill
material in appropriate
proportion to get thermal
resistivity value of 2Km/watt.
 Thermal resistivity test shall
be conducted as per ASTM
D 5334, on soil samples
compacted to 90% MDD
(Standard proctor density) to
QC
ITR-C0101X
&
ITR-C0102X
&
Pictures of
Excavation
&
Backfilling
Page 9 of 17
Item
Control
Activity
Action to be verified
Reference Document
Acceptance Criteria
Responsible
Party
Intervention Points
Verifying
Document
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reflect the actual compaction
of trench backfill.
11.0
Excavation
work
 Marking and setting
out
 Excavation
lines/elevation
 Vertical sides
preparation/support/
shoring
 UG services
identification
 Dewatering system
 Specification for Site
Preparation, Excavation
& Backfill (DRP001OUF-SPE-C-000-500)
 IFC Drawings
 Excavation dimensions shall
be in accordance with
Contract documents and IFC
drawings
 Excavated material shall be
stock piled
 Shoring to be provided (If
required)
 Prior to excavation,
underground services shall
be identified and a hazard
assessment of work site
prepared by competent
person
 If required dewatering
system to be provided
 Over excavation shall be
backfilled with suitable fill
material and compacted to
required degree of
compaction as stated under
Item 14& 15 of this ITP or
may be backfilled with lean
concrete of a mix design
proportioned to achieve a
minimum 28-day
compressive strength 7.0
MPa.
 Unless otherwise shown in
the contract documents,
excavation under
foundations shall not be
permitted.
 Known contaminated soils
within the construction limits
shall be managed in
accordance with a
QC
ITR-C0101X
&
ITR-C0102X
&
Pictures of
Excavation
Page 10 of 17
Item
Control
Activity
Action to be verified
Reference Document
Acceptance Criteria
Responsible
Party
Verifying
Document
Intervention Points
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contaminated soil
management plan provided
by the Contractor before the
start of excavation.
 Vertical tolerance for
structural excavations and
earthen structure shall be
±25mm
 If blasting is not permitted,
rock shall be excavated with
mechanical rippers,
mechanical breakers, or
mechanical drills with nonexplosive demolition agents.
 If blasting is permitted and
required, blasting operations
shall be managed in
accordance with the rockblasting plan (DRP001-FEDSPE-C-000-500, Clause
6.1.8.2).
 Excavation safety shall be
as per DRP001-FED-SPEC-000-500, Clause 6.3.2.4
and contract documents.
12.0
Preparation
for filling
areas
 Cleaning
 Sub grade preparation
 Finished grade level
 Specification for Site
Preparation, Excavation
& Backfill (DRP001OUF-SPE-C-000-500,
Clause 6.3.6)
 IFC Drawings
 ASTM D1557
 ASTM D698
 Prior to filling, area to
receive fill shall be cleared of
all vegetation and
construction debris
 Area shall be free of
standing water
 Area shall be proof rolled
with 10 tonne roller.
 Before placing classified fill,
the sub-grade top 150mm
shall be scarified and recompacted in accordance
with Item 14& 15 of this ITP
QC
ITR-C0101X
&
ITR-C0102X
Page 11 of 17
Item
Control
Activity
Action to be verified
Reference Document
Acceptance Criteria
Responsible
Party
Verifying
Document
Intervention Points
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 Area to receive fill shall be
free of loose and soft soil
 If soft, compressible soil is
encountered at footing
grades, as shown in the
contract documents, the
Company shall be informed
by Contractor with proposals
removal and replacement of
material with structural fill.
 Where ground improvement
required, Contractor shall
propose to Company for
approval, prior to start of the
activity.
 Geotextile materials shall be
placed as per IFC drawings.
 Finished grade level and coordinates shall be as per IFC
drawings.
 The density of the top 150
mm in areas for fill and
loading shall not be less
than 90% of the maximum
Modified Proctor density in
accordance with ASTM
D1557, or 95% of the
maximum Standard Proctor
density in accordance with
ASTM D698.
13.0
Placement of
fill material
 Structural Fill material
spreading beneath and
around foundations,
beneath slabs,
roadways, railroads,
area pavement, and
parking areas
 General Fill material
 Layer thickness
 Specification for Site
Preparation, Excavation
& Backfill (DRP001OUF-SPE-C-000-500,
Clause 6.3.7)
 IFC drawings
QC
 Structural fill shall be placed
ITR-C0101X
in lifts of 200 mm maximum
in loose depth.
 General fill shall be placed in
lifts of 300 mm maximum in
loose depth.
 For hand-operated
compaction equipment,
Page 12 of 17
Item
Control
Activity
Action to be verified
Reference Document
Acceptance Criteria


 OMC control



14.0
Compaction
Test
 Layer thickness
 Degree of compaction
 Test reports
verification
 Specification for Site
Preparation, Excavation
& Backfill (DRP001OUF-SPE-C-000-500,
Responsible
Party
Verifying
Document
Intervention Points
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general and structural fill
materials shall be placed in
lifts of 100 mm maximum in
loose depth
Side slopes of embankments
and berms shall be cut true
and straight, as shown on
the IFC drawings, and shall
be graded to the proper
cross section.
Soil that is spilled or washed
onto paved areas, roads or
highways or washed into
drains, pipes, gutters, or
ditches or onto adjacent
property shall be removed
daily from the surface.
Unless otherwise permitted
in writing by the Company,
backfill around or over castin-place concrete shall not
be permitted until the
concrete has attained 75%
of its specified strength.
Compacted surface of fill
and backfill shall be within a
vertical tolerance of ±25mm
for rough grading and
±15mm for structural backfill.
Installation of base course
for roads, parking area to be
surfaced shall be as per
DRP001-OUF-SPE-C-000500, clause 6.3.8.
 Fill shall be compacted to
required degree of
compaction in accordance
with (DRP001-OUF-SPE-C-
ITR-C0101X
QC
&
Page 13 of 17
Item
Control
Activity
Action to be verified
Reference Document
Acceptance Criteria
 Application of proctor
value
clause 6.3.7)
 IFC drawings
 Sand-cone method in
accordance with ASTM
D1556
 Nuclear method in
accordance with ASTM
D2922
 Drive-cylinder method in
accordance with ASTM
D2937
000-500) and IFC
drawings.
 Structural fill shall be
compacted to at least 90%
of the maximum Modified
Proctor density in
accordance with ASTM
D1557, or 95% of the
maximum Standard Proctor
density in accordance with
ASTM D698.
 Granular soil used as
structural fill that does not
exhibit well-defined
moisture-density
relationship shall be
compacted to at least 80%
relative density in
accordance with ASTM
D4253 and ASTM D4254.
 General fill shall be
compacted to at least 85%
of the maximum Modified
Proctor density in
accordance with ASTM
D1557, or 90% of the
maximum Standard Proctor
density in accordance with
ASTM D698.
 Granular soil used as
general fill that does not
exhibit well-defined
moisture-density
relationship shall be
compacted to 70% to 75%
relative density in
accordance with ASTM
D4253 and ASTM D4254.
Responsible
Party
Verifying
Document
Intervention Points
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Pictures of
Compacted
area
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Item
Control
Activity
Action to be verified
Reference Document
Acceptance Criteria
Responsible
Party
Verifying
Document
Intervention Points
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 The moisture content of the
material being compacted
shall be within +3% of the
optimum moisture content
 Where hand operated
compacting equipment is
used, fill shall be
compacted to required
degree of compaction in
accordance with DRP001OUF-SPE-C-000-500/IFC
drawings.
 If approved by the
Company in writing,
chemical stabilization may
be used if modification of
liquid limit and plasticity
index are necessary to
obtain satisfactory
compaction.
 Compaction by water jetting
or flooding shall not be
permitted.
 Compaction of base course
shall be to at least 95% of
the maximum Modified
Proctor density in
accordance with ASTM
D1557, or 100% of the
maximum Standard Proctor
density in accordance with
ASTM D698. If base course
materials are clean
granular material and
Relative Density is the
standard, compact to 85%
of relative density.
 All failed areas shall be recompacted and retested.
Retest shall bear same test
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Item
Control
Activity
Action to be verified
Reference Document
Acceptance Criteria
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Party
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Document
Intervention Points
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identification number as the
original test number with
suffix “R”
15.0
Frequency of
compaction
tests and
other fill
material
tests
 Verification of
compaction tests
frequency
 Verification of fill
material full analysis
frequency
 Specification for Site
Preparation, Excavation
& Backfill (DRP001OUF-SPE-C-000-500,
Clause 6.1.4)
 IFC drawings
 Structural fill under
foundations and building
slabs – one test every 1000
square feet (90 square m)
of each lift
 Tank Foundations – for tank
foundations a minimum of 3
field density tests for every
5000 square feet (460
square m) of each
compacted layer.
 Structural fill under
roadways, railroads, area
pavement and parking areas
– one test every 2000
square feet (180 square m)
of each lift
 Road base and sub-base –
one test every 2000 square
feet (180 square m) of each
lift
 Backfill of trenches (for utility
lines or foundations) – one
test for every 50 linear feet
(15 m) of each lift where
directed by Company.
 General fill – one test
minimum every 5000 square
feet (460 square m) of each
lift.
 As a minimum, one, in-place
moisture content and one
density test shall be
performed on every
individual layer of fill, per
QC
ITR-C0101X
Page 16 of 17
Item
16
17.0
Control
Activity
Geo-textile
Membrane,
HDPE liner &
Pipe sleeves
for CP
Site
preparation
and Earth
work
completion
Action to be verified
Reference Document
 Installation of Geotextile Membrane,
HDPE liner & Pipe
sleeves for CP
 Specification for Site
Preparation, Excavation
& Backfill (DRP001OUF-SPE-C-000-500,
Clause 6.1.4)
 IFC drawings
 DRP-001-OUF-510030C-CON-004-001, R2
 DRP-001-OUF-510030C-CON-004-002, R2
 Compile all Inspection
and test records and
laboratory test records
 Survey reports for
Finished grade level
 DRP001-OUF-SPE-C000-500
 IFC drawings
Acceptance Criteria
work area.
 For embankments, in place
density and moisture content
tests, in accordance with
structural fill requirements in
DRP001-OUF-SPE-C-000500, clause 6.3.7 (Filling and
Backfilling) shall be
performed on every lift of
compacted fill every 150m2,
unless directed otherwise by
the Company.
 Geo-textile Membrane,
HDPE liner & Pipe sleeves
for CP shall be installed as
per IFC drawings.
 Geo-textile Membrane,
HDPE liner & Pipe sleeves
for CP shall be as per
Referenced project
specifications
 Materials shall be approved
prior to use.
 All quality records shall be
approved and signed by all
parties
Responsible
Party
QC
QC
Intervention Points
Verifying
Document
SC
PSJV
C
TP
ITR-C0101X
H
W
W
N/A
H
H
H
N/A
ITR-C0104A
&
Pictures of
Earth work
completion
Page 17 of 17