Ba e 94703 Irrigation

PROJECT

Soil remediation of contaminated features in SEK fields

LOCATION

Kuwait

JOB

UNIT

068395

00

SPC. 00-BA-E-94703

Technical specification for Irrigation type and Installation

Rev.

Sh. 1 di 20

0

SOIL REMEDIATION OF CONTAMINATED FEATURES IN SEK FIELDS IRRIGATION TYPE AND INSTALLATION TECHNICAL SPECIFICATION

0

Rev.

Issue

Description

Schillaci

Valentini

Buongarzone

May ‘11

Prepared

Checked

Approved

Date

Data file: 170352881.doc This document is the property of Saipem who will safeguard its rights according to the civil and penal provisions of the law.

PROJECT


LOCATION

Kuwait Technical specification for Irrigation type and Installation

JOB

UNIT

068395

00

SPC. 00-BA-E-94703 Sh. 2 di 20

Rev.

0

CONTENTS

1 DEFINITION AND ABBREVIATION

3

2 GENERAL

4

3 SCOPE OF WORK

6

4 STANDARDS AND REFERENCES

7

5 SYSTEM DESCRIPTION

8

6 SUBMITTALS

14

7 QUALITY ASSURANCE (WARRANTY)

15

8 COORDINATION AND SEQUENCING

16

9 METHOD OF MEASUREMENT

17


PROJECT


LOCATION


1

JOB

UNIT

068395

00

SPC. 00-BA-E-94703 Sh. 3 di 20

Rev.

0

DEFINITION AND ABBREVIATION Company:

KOC (Kuwait Oil Company)

Contractor:

Saipem Spa

Subcontractor: Any person, firm, partnership, corporation or combination thereof to whom any part of the works is sub contracted by the Contractor in accordance with the terms of the contract. Superintendent: The Contractor’s Team Leader Health & Environment or such other person as is notified in writing to the Subcontractor by the Contractor. KEPA:

Kuwait Environmental Public Authority


PROJECT


LOCATION


2

JOB

UNIT

068395

00

SPC. 00-BA-E-94703 Sh. 4 di 20

Rev.

0

GENERAL The aim of the project is to carry out remediation and rehabilitation works of existing pits and contaminated soil in the South and East Kuwait Assets in Kuwait. The project is incorporated under Company’s strategy of “Soil Remediation of Contaminated Features in SEK Fields”. Key objectives of the Project include the following: • To repair damage done to the natural landscape as a result of oil operations over many decades; • To rehabilitate a selection of contaminated features to ecologically functioning areas that are able once again to support a typical range of native plant species; • Appropriate Health & Safety protocols and Explosive Ordnance Detection (EOD) appropriate to the associated risks noted with the features; • To recover oil contained within the features (where applicable); • To apply a risk based methodology of remediation concurrent with recognized international protocols adapted to the prevailing environmental conditions in Kuwait; • To initiate soil remediation techniques associated with the nature of the oil contamination existing within the features; • To establish a selection of native plant species to initiate ecosystem recovery and reduce desertification at the selected features; • To monitor and compare the effectiveness of various remediation approaches using the established native plant species as performance indicators. Features to be treated are: Sludge Pits: originate from a number of operational activities associated with Company operations. These pits have generally arisen from the need to dispose of excess crude oil during shutdowns and during work-over operations associated with Gathering Centres (GCs) and well heads. Crude oil from well head work-over operations stored locally in burn pits (disposal pits) is generally disposed of in the Sludge Pits. Oily sludges from the base of tanks from GCs and Tank Farms are also disposed of to these pits. As a consequence of the construction and use of these Sludge Pits soil has been contaminated with crude oil in the vicinity of and underlying each Sludge Pit. Effluent Pits: are disposal pits in which waste process water produced from the initial separation of oil, gas and water is left to evaporate. This initial separation occurs at the Gathering Centres (GCs), thus Effluent Pits are generally positioned no greater than 1,000m from a GC. Each GC has several such pits associated with it. Gatch Pits: are hard pans of calcareous sand or gravel. Gatch is used for construction works throughout Kuwait. Within Company operations it is used for the construction of secondary roads and as a lining material for various operational features. A Gatch Pit is created by open pit mining of the gatch layer near surface. These pits can vary from 2 – 10m in depth from natural ground level. Pits and contaminated soil are shared out among LOT A, LOT B and LOT C located within a Company controlled restricted area. Data file: 170352881.doc

This document is the property of Saipem who will safeguard its rights according to the civil and penal provisions of the law.

PROJECT


LOCATION

JOB

UNIT

068395

00

SPC. 00-BA-E-94703


Sh. 5 di 20

Rev.

0

The features in Lot A are shown in Table herein: Feature Type Effluent Pit A1 Effluent Pit A2 Effluent Pit A3 Effluent Pit A4 Effluent Pit A5 Gatch Pit A1 Gatch Pit A2 Sludge Pit A1 Sludge Pit A2

Estimated Area (m2) 54,591 79,606 47,026 73,020 72,115 145,414 74,640 32,834 124,019

The features in Lot B are shown in Table herein: Feature Type Effluent Pit B1 Effluent Pit B2 Effluent Pit B3 Gatch Pit B1 Gatch Pit B2 Sludge Pit B1 Sludge Pit B2 Contaminated Soil Pile B1

Estimated Area (m2) 51,138 62,398 47,658 112,443 112,838 13,751 149,249 2,972

The features in Lot C are shown in Table herein: Feature Type Effluent Pit C1 Effluent Pit C2 Effluent Pit C3 Effluent Pit C4 Effluent Pit C5 Effluent Pit C6 Sludge Pit C1 Contaminated Soil Pile C1

Estimated Area (m2) 56,232 69,206 50,941 73,960 58,621 68,859 16,294 13,500

As part of the works, temporary irrigation systems will be installed at selected areas of the Site. Irrigation systems will create suitable conditions to facilitate and support the initial growth of native plant species until they have established. The irrigation system shall be a low cost, low technology, reusable, vertical deep pipe irrigation system which is hyper efficient in terms of water usage. This system delivers the minimal amount of water required for plant establishment directly to the root zone in a controlled, measurable manner. In addition, it eliminates the deposition of surface salts which is detrimental to ecological rehabilitation and which is typical of conventional drip irrigation systems. In comparative studies of irrigation system types, deep pipe systems of this type have been proven to be the most effective in restoring native vegetation to semi arid and arid environments. Data file: 170352881.doc This document is the property of Saipem who will safeguard its rights according to the civil and penal provisions of the law.

PROJECT


LOCATION


3

JOB

UNIT

068395

00

SPC. 00-BA-E-94703 Sh. 6 di 20

Rev.

0

Two system types (High and Low) representing two different water application rates are required and are described herein. SCOPE OF WORK The Subcontractor shall: • erect irrigation systems to the specification described herein or to an equivalent or greater standard, subject to approval of the Superintendent; • examine the Site to familiarise themselves with the existing situation; • erect irrigation systems at specified locations as approved by the Superintendent. The irrigation systems must be maintained in good condition at all times.


PROJECT


LOCATION


4

JOB

UNIT

068395

00

SPC. 00-BA-E-94703 Sh. 7 di 20

Rev.

0

STANDARDS AND REFERENCES •

STM D1785 "Standard Specification for Polyvinyl Chloride (PVC) Plastic Pipe, Schedule 40

•

BAINBRIDGE, D.2007 “A Guide for Dessert and Dryland Restoration” Island Press. ISBN 1- 55963-968-7”



PROJECT LOCATION


SYSTEM DESCRIPTION

5.1

Deep Pipe - High Level Irrigation

UNIT

00

SPC. 00-BA-E-94703

Kuwait

5

JOB

068395

Rev.

Sh. 8 di 20

0

Pipes shall be constructed from polyvinyl chloride (PVC), be 50 cm long and 10 cm in diameter, to give an approximate internal volume of 3.92 litres (Fig. 1). The bottom of the pipe shall be sealed and watertight with a PVC cap, glued in place with PVC cement. The top of the pipe should be covered with a galvanised wire or mesh screen (screen holes no greater than 3 mm in diameter) and securely fixed in place to prevent the ingress and trapping of wildlife and reduce infilling by sand. The tube shall be drilled with five (5) circular drainage holes spaced at 7.5 cm intervals to a 3 mm diameter, along one side of the pipe. All drainage holes shall be > 20 cm from the top of the pipe. The top of the pipe should be notched to indicate the location of the holes drilled down one side. Two 1.25 cm holes on either side of the pipe shall be drilled 5 cm below the tube top to allow for rod retraction of the pipe at end of contract. 5.2

Deep Pipe - Low Level Irrigation Pipes shall be constructed from PVC, be 50 cm long and 7.5 cm in diameter, to give an internal approximate volume of 2.2 litres (Fig. 1). The bottom of the pipe shall be sealed and watertight with a PVC cap, glued in place with PVC cement. The top of the pipe should be covered with a galvanised wire or mesh screen (screen holes no greater than 3 mm in diameter) and securely fixed in place to prevent the ingress and trapping of wildlife and reduce infilling by sand. The tube shall be drilled with five (5) circular drainage holes spaced at 7.5 cm intervals to a 3 mm diameter, along one side of the pipe. All drainage holes shall be > 20 cm from the top of the pipe. The top of the pipe should be notched to indicate the location of the holes drilled down one side. Two 1.25 cm circular holes on either side of the pipe shall be drilled 5 cm below the tube top to allow for rod retraction of the pipe at end of Contract. Total amount (N°) of deep pipes to be installed inside each feature type per Lot is listed in the tables below: Tab. 5.2.1: Lot A: deep pipes number inside each feature type Feature Type

Area (m2)

High Level Irrigation (10 cm diameter) (N°)

Low Level Irrigation (7,5 cm diameter) (N°)

Effluent Pit A3

47,026

1,750

1,750

Effluent Pit A4

73,020

1,822

1,822

Gatch Pit A2

74,640

4,708

-

Sludge Pit A1

32,834

430

430


PROJECT


LOCATION

JOB

UNIT

068395

00

SPC. 00-BA-E-94703


Rev.

Sh. 9 di 20

0

Fig. 1 - General Schematic of Deep Pipe Irrigation System; note: High Level: PVC Pipe Diameter of 10 cm, Low Level: PVC Pipe Diameter of 7.5 cm

Tab. 5.2.2: Lot B: deep pipes number inside each feature type Feature Type

Area (m2)

High Level Irrigation (10 cm Diameter) (N°)


Effluent Pit B1

51,138

72

72

Effluent Pit B2

62,398

1,750

1,750

Effluent Pit B3

47,658

1,750

1,750

Gatch Pit B1

112,443

2,150

-

Gatch Pit B2

112,838

2,900

-

Sludge Pit B1

13,751

430

430


PROJECT


LOCATION

JOB

UNIT

068395

00

SPC. 00-BA-E-94703


Rev.

Sh. 10 di 20

0

Tab. 5.2.3: Lot C: deep pipes number inside each feature type

5.3

Feature Type

Area (m2)

High Level Irrigation (10 cm Diameter) (N°)


Effluent Pit C1

56,232

75

75

Effluent Pit C3

50,941

1,750

1,750

Effluent Pit C4

73,960

1,750

1,750

Sludge Pit B1

16,294

430

430

Installation To prevent damage to plants all irrigation pipes shall be installed prior to planting native plant species. Pipes shall be installed vertically; the pipes shall be inserted into dug or pre drilled (augured) bored holes to a depth of 45 cm. A maximum of 10 cm of the irrigation pipe may extend above the surface; all 5 drilled circular drainage holes shall be below the surface. Backfill soil loosely around the tube to provide a firm grounding for the pipe. Each installed shrub, grass or legume species shall have one corresponding irrigation tube sited adjacent to it with the pre drilled drainage holes facing towards the corresponding plant. Each individual irrigation tube shall be installed 7.5 cm away from its corresponding plant (shrub, grass, legume). Each tree species whips shall have three tubes sited around the tree in a triangle formation with the pre drilled drainage holes facing towards the tree whip. Each of the three tree irrigation tubes shall be sited 20 cm away from its corresponding tree. During the installation period, the Subcontractor shall inspect the locations of the irrigation system at the end of each day to ensure proper placement. Care shall be taken not to overly compact soil in the planting blocks during installation. Vehicular movement across the designated planted blocks to facilitate irrigation installation is not permitted.

5.4

Location Only High Level irrigation tubes shall be placed adjacent to each installed plant / tree as the standard procedure within gatch pits. High Level irrigation tubes shall be installed adjacent to each plant within all planting blocks marked as High level Irrigation Areas on the Drawings. Only Low Level irrigation tubes shall be installed at all locations marked as Low level Irrigation Areas on the drawings: Low Level irrigation tubes are not to be installed within the permitted planting areas within gatch pits.

5.5

Irrigation Schedule Each individual plant (and trees) shall be watered by filling each plants corresponding vertical irrigation tube (s) until water exits from the top of the tube and, or, extraction holes. Water requirements are approximately 3.92 liters for a high level application Data file: 170352881.doc


PROJECT


LOCATION

JOB

UNIT

068395

00

SPC. 00-BA-E-94703


Rev.

Sh. 11 di 20

0

tube and approximately 2.2 liters for low level tubes. However, the Subcontractor is responsible for accurately quantifying the water requirements to fill each tube. Plants shall be watered during the growing season only. The growing season is considered within the framework of this contract as 1st November – 31st May inclusive. Plants shall be irrigated across two growing seasons. After plant installation, watering immediately into the plants surrounding soil (i.e not through the irrigation tube); apply 1 litre to all grasses and legumes and 2 litres to shrubs and trees. Further irrigate by filling the adjacent irrigation tube until water overtops / exits through the rod extraction holes. Further irrigation shall then occur fortnightly (bi weekly) during the months of November, December, January, February, March, April and then monthly, within the month May. No watering shall occur during any other month. Plants shall be watered to this schedule regardless of natural rainfall patterns. The Subcontractor shall ensure minimal damage to any emerging vegetation in and around the vegetation blocks and minimize compaction to the surrounding soils, whilst undertaking irrigation works. Total amount (litres) of irrigation water to be considered for two growing seasons inside each feature type per Lot is listed below: Tab. 5.5.4: Lot A: total amount of irrigation water (litres) inside each feature type for two growing seasons (including installation watering).

Feature Type

High Level Irrigation – Irrigation water (litres)

Low Level Irrigation Irrigation water (litres)

N° of watering

Effluent Pit A3 Effluent Pit A4 Gatch Pit A2 Sludge Pit A1

6,860 7,142 18,456 1,686

3,850 4,008 946

27 27 27 27

High Level Irrigation – Total litres (including installation watering) 187,595 195,330 504,692 46,122

Low Level Irrigation Total litres (including installation watering) 106,325 110,712 26,142

Tab. 5.5.5: Lot B: total amount of irrigation water (litres) inside each feature type for two growing seasons (including installation watering).

Feature Type



N° of watering

Effluent Pit B1 Effluent Pit B2 Effluent Pit B3 Gatch Pit B1 Gatch Pit B2 Sludge Pit B1

282 6,860 6,860 8,428 11,368 1,686

158 3,850 3,850 946

27 27 27 27 27 27

High Level Irrigation – Total litres (including installation watering) 7,714 187,620 187,620 230,458 310,715 46,122

Low Level Irrigation Total litres (including installation watering) 4,366 106,350 106,350 26,142



PROJECT LOCATION

JOB

UNIT

068395

00

SPC. 00-BA-E-94703


Rev.

Sh. 12 di 20

0

Tab. 5.5.6: Lot C: total amount of irrigation water (litres) inside each feature type for two growing seasons (including installation watering)

Feature Type



N° of watering

Effluent Pit C1 Effluent Pit C3 Effluent Pit C4 Sludge Pit B1

294 6,860 6,860 1,686

165 3,850 3,850 946

27 27 27 27

High Level Irrigation – Total litres (including installation watering) 8,038 187,620 187,620 46,122

Low Level Irrigation Total litres (including installation watering) 4,555 106,350 106,350 26,142

Quantity of irrigation water (litres) per watering event inside each feature type per Lot is listed below. This amount has to be considered in order to provide a proper water tank at each feature location. Tab. 5.5-7: Lot A: irrigation water (litres) inside each feature type per watering event Feature Type

Litres per High Level Irrigation

Litres per Low Level Irrigation

Litres per watering event

Water tank (m3)

Effluent Pit A3 Effluent Pit A4 Gatch Pit A2 Sludge Pit A1

6,860 7,142 16,024 1,686

3,850 4,008 1,364 946

10,710 11,150 17,388 2,632

12 12 18 6

Tab. 5.5.8: Lot B: irrigation water (litres) inside each feature type per watering event Feature Type


Effluent Pit B1 Effluent Pit B2 Effluent Pit B3 Gatch Pit B1 Gatch Pit B2 Sludge Pit B1

282 6,860 6,860 8,428 11,368 1,686



Water tank (m3)

158 3,850 3,850

440 10,710 10,710 8,428 11,368 2,632

6 12 12 12 12 6

946

Tab. 5.5.9: Lot C: irrigation water (litres) inside each feature type per watering event Feature Type




Water tank (m3)

Effluent Pit C1 Effluent Pit C3 Effluent Pit C4 Sludge Pit B1

294 6,860 6,860 1,686

165 3,850 3,850 946

459 10,710 10,710 2,632

6 12 12 6


PROJECT


LOCATION


5.6

JOB

UNIT

068395

00

SPC. 00-BA-E-94703 Sh. 13 di 20

Rev.

0

Removal Immediately prior to the issue of the Certificate for Completion for the Aftercare and Maintenance Portion of each feature and as approved by the Superintendent, the deep pipes shall be removed and disposed off-Site in accordance with Contractor procedures. Care shall be taken not to cause harm to the surrounding plants during removal of pipes. Care shall be taken not to overly compact soil in the planting blocks. Vehicular movement across such areas to collect pipes is not permitted. Pipes shall be removed by hand pulling utilising the above surface predrilled rod holes. Remaining holes shall be loosely backfilled with surrounding soil.

5.7

General Maintenance The Subcontractor shall replace or repair any damaged irrigation tubing as required throughout the Contract period as directed by the Superintendent.


PROJECT


LOCATION


6

JOB

UNIT

068395

00

SPC. 00-BA-E-94703 Sh. 14 di 20

Rev.

0

SUBMITTALS Prior to fabrication and delivery, submit to the Superintendent for approval, material data sheets, samples encompassing predrilled tubes, cap and wire mesh screen, for each of the two specified irrigation types (deep pipe irrigation High and Low). Approved samples of fittings may be used in the works when no longer needed by the Superintendent for inspection and comparison purposes. The Subcontractor shall develop the typical Gatch Pit Site Plans and Rehabilitation Site Layout Schematics details and submit for the approval of the Superintendent detailed shop drawings for each rehabilitated feature, indicating plant location, type and irrigation layout prior to commencing this element of the Works. The Contractor shall accurately quantify all pipe materials and numbers necessary to fulfil the irrigation requirements of the project. The Superintendent's approval shall not relieve the Subcontractor of his obligations and liabilities under the Contract.


PROJECT


LOCATION


7

JOB

UNIT

068395

00

SPC. 00-BA-E-94703 Sh. 15 di 20

Rev.

0

QUALITY ASSURANCE (WARRANTY) The Superintendent will inspect all irrigation pipes upon arrival to Site. Upon acceptance of the pipes as to compliance with the technical specification, samples provided, quantities and condition, written agreement and notice will be given to proceed with installation. Irrigation pipes found not to comply with these specifications will be rejected and will be replaced, at no additional cost to the Contractor.


PROJECT


LOCATION


8

JOB

UNIT

068395

00

SPC. 00-BA-E-94703 Sh. 16 di 20

Rev.

0

COORDINATION AND SEQUENCING Coordinate and sequence the works such that there is no delay to the Contract. Install irrigation tubes prior to the installation of native species as specified in Planting Procedures and Site Layout Specification.


PROJECT


LOCATION


METHOD OF MEASUREMENT

9.1

Irrigation Systems 9.1.1

UNIT

00

SPC. 00-BA-E-94703

Kuwait

9

JOB

068395

Sh. 17 di 20

Rev.

0

Measurement Irrigation tubes have to be quoted as stated herein: Tab. 9.1.10: Lot A: deep pipes number inside each feature type High Level Irrigation (10 cm diameter)

LOT A

Low Level Irrigation (7,5 cm diameter)

Feature Type

Area (m2)

N°

Ep3

47,026

1,750

1,750

Ep4

73,020

1,822

1,822

Gp2

74,640

4,088

620

Sp1

32,834

430

430

Cost (KD)

N°

Cost (KD)

Tab. 9.1.11: Lot B: deep pipes number inside each feature type High Level Irrigation (10 cm Diameter)

LOT B


Feature Type

Area (m2)

N°

Ep1

51,138

72

72

Ep2

62,398

1,750

1,750

Ep3

47,658

1,750

1,750

Gp1

112,443

2,150

-

Gp2

112,838

2,900

-

Sp1

13,751

430

430

Cost (KD)

N°

Cost (KD)

Tab. 9.1.12: Lot C: deep pipes number inside each feature type High Level Irrigation (10 cm Diameter)

LOT C


Feature Type

Area (m2)

N°

Ep1

56,232

75

75

Ep3

50,941

1,750

1,750

Ep4

73,960

1,750

1,750

Sp1

16,294

430

430

9.1.2

Cost (KD)

N°

Cost (KD)

Pricing The rates for irrigation systems, unless stated otherwise or measured separately, shall be considered inclusive but not limited to the following: • Provision of all labour, materials and equipment required to manufacture the irrigation tubes, including all glues, meshes and caps and any other materials required as specified; Data file: 170352881.doc


PROJECT


LOCATION


• •

9.2

UNIT

00

SPC. 00-BA-E-94703

Kuwait

•

JOB

068395

Rev.

Sh. 18 di 20

0

Delivery of the irrigation tubes to Site, including all transportation and labour costs associated with such; All labour costs required to facilitate the installation of the irrigation tubes; All measuring labour, plant and equipment including but not limited to augers, shovels, digging devices and any other such equipments or ancillary costs required to install the irrigation system.

Irrigation The rates for irrigation, unless stated otherwise or measured separately, shall be considered inclusive but not limited to the following: • Supply of all irrigation water to Site including transporting to Site and provision and maintenance of any storage or groundwater extraction facilities inclusive of commissioning and decommissioning of same; • Provision of all labour, plant, equipment and material required to treat or mix source waters to reach the specified standards; • Provision of all necessary labour, plant, equipment and other measures necessary to deliver the water to each plant. Irrigation water has to be quoted as stated herein: Tab. 9.2-13: Lot A: total amount of irrigation water (litres) inside each feature type for two growing seasons LOT A Feature Type Ep3 Ep4 Gp2 Sp1

Number of watering (N°) 27 27 27 27

High Level Irrigation Total litres

Cost (KD)

185,220 192,834 432,648 45,522

Low Level Irrigation Total litres

Cost (KD)

103,950 108,216 36,828 25,542

Tab. 9.2-14: Lot B: total amount of irrigation water (litres) inside each feature type for two growing seasons LOT B Feature Type Ep1 Ep2 Ep3 Gp1 Gp2 Sp1

Number of watering (N°) 27 27 27 27 27 27

High Level Irrigation Total litres 7,614 185,220 185,220 227,556 306,936 45,522

Cost (KD)


Cost (KD)

4,266 103,950 103,950 25,542



PROJECT LOCATION

JOB

UNIT

068395

00

SPC. 00-BA-E-94703


Rev.

Sh. 19 di 20

0

Tab. 9.2-15: Lot C: total amount of irrigation water (litres) inside each feature type for two growing seasons LOT C Feature Type Ep1 Ep3 Ep4 Sp1

High Level Irrigation

Number of watering (N°) 27 27 27 27

Total litres

Cost (KD)

7,938 185,220 185,220 45,522


Cost (KD)

4,455 103,950 103,950 25,542

Water tanks have to be quoted as a lump sum as stated below: Tab. 9.2.16: Lot A:litres per watering event inside each feature type LOT A Feature Type Ep3 Ep4 Gp2 Sp1

Water tank (m3)

Litres per watering event 10,710 11,150 17,388 2,632

Cost (KD)

12 12 18 6

Tab. 9.2.17: Lot B: litres per watering event inside each feature type LOT B Feature Type Ep1 Ep2 Ep3 Gp1 Gp2 Sp1

Litres per watering event 440 1,0710 10,710 8,428 11,368 2,632

Water tank (m3) 6 12 12 12 12 6

Cost (KD)

Tab. 9.2.18: Lot C: litres per watering event inside each feature type LOT C Feature Type Ep1 Ep3 Ep4 Sp1

9.3

Litres per watering event 459 10,710 10,710 2,632

Water tank (m3)

Cost (KD)

6 12 12 6

Irrigation tube removal The rates for irrigation tube removal, unless stated otherwise or measured separately, shall be considered inclusive but not limited to the following: as specified including: • Provision of all labour, plant, materials and equipment required to extract and gather up the tubes; • Sorting of the gathered tubes into good condition and defective piles and protecting and storing until removal from Site as instructed by the Superintendent; Data file: 170352881.doc


PROJECT


LOCATION


• •

JOB

UNIT

068395

00

SPC. 00-BA-E-94703 Sh. 20 di 20

Rev.

0

Removal of tubes from Site including all associated transportation, fuel, labour, plant and disposal costs; Loose backfilling of the holes with surrounding soil.


Ba e 94703 Irrigation

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