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ESKOM HOLDINGS SOC Ltd MPGXC004279NORTH AND SOUTH LIME PLANT REFURBISHMENT

NEC3 Engineering & Construction Contract

Between ESKOM HOLDINGS SOC Ltd (Reg No. 2002/015527/30)

and [Insert at award stage](Reg No. ___________ )

for North and South Lime Plant Refurbishment and Procurement of New Silo at Kriel Power Station

Contents: No of pages

Part C1 Agreements & Contract Data 2

Part C2 Pricing Data 21

Part C3 Scope of Work 27

Part C4 Site Information 80

CONTRACT No.


C1.1 Form of Offer & AcceptanceOffer

The Employer, identified in the Acceptance signature block, has solicited offers to enter into a contract for the procurement of:

North and South Lime Plant Refurbishment and Procurement of New Silo at Kriel Power StationThe tenderer, identified in the Offer signature block, has examined the documents listed in the Tender Data and addenda thereto and by submitting this Offer has accepted the Conditions of Tender.

By the representative of the tenderer, deemed to be duly authorised, signing this part of this Form of Offer and Acceptance the tenderer offers to perform all of the obligations and liabilities of the Contractor under the contract including compliance with all its terms and conditions according to their true intent and meaning for an amount to be determined in accordance with the conditions of contract identified in the Contract Data.

Options A The offered total of the Prices exclusive of VAT is R

Value Added Tax @ 14% is R

The offered total of the amount due inclusive of VAT is1 R

(in words)

This Offer may be accepted by the Employer by signing the Acceptance part of this Form of Offer and Acceptance and returning one copy of this document including the Schedule of Deviations (if any) to the tenderer before the end of the period of validity stated in the Tender Data, or other period as agreed, whereupon the tenderer becomes the party named as the Contractor in the conditions of contract identified in the Contract Data.

Signature(s)

Name(s)

Capacity

For the tenderer:

Name & signature of witness

(Insert name and address of organisation)

Date

Tenderer’s CIDB registration number (if applicable)

1 This total is required by the Employer for budgeting purposes only. Actual amounts due will be assessed in terms of the conditions of contract.

PART C3: SCOPE OF WORK PAGE 2 C3 ECC3 COVER PAGE


Acceptance

By signing this part of this Form of Offer and Acceptance, the Employer identified below accepts the tenderer’s Offer. In consideration thereof, the Employer shall pay the Contractor the amount due in accordance with the conditions of contract identified in the Contract Data. Acceptance of the tenderer’s Offer shall form an agreement between the Employer and the tenderer upon the terms and conditions contained in this agreement and in the contract that is the subject of this agreement.

The terms of the contract, are contained in:

Part C1 Agreements and Contract Data, (which includes this Form of Offer and Acceptance)

Part C2 Pricing Data

Part C3 Scope of Work: Works Information

Part C4 Site Information

and drawings and documents (or parts thereof), which may be incorporated by reference into the above listed Parts.

Deviations from and amendments to the documents listed in the Tender Data and any addenda thereto listed in the Returnable Schedules as well as any changes to the terms of the Offer agreed by the tenderer and the Employer during this process of offer and acceptance, are contained in the Schedule of Deviations attached to and forming part of this Form of Offer and Acceptance. No amendments to or deviations from said documents are valid unless contained in this Schedule.

The tenderer shall within two weeks of receiving a completed copy of this agreement, including the Schedule of Deviations (if any), contact the Employer’s agent (whose details are given in the Contract Data) to arrange the delivery of any securities, bonds, guarantees, proof of insurance and any other documentation to be provided in terms of the conditions of contract identified in the Contract Data at, or just after, the date this agreement comes into effect. Failure to fulfil any of these obligations in accordance with those terms shall constitute a repudiation of this agreement.

Notwithstanding anything contained herein, this agreement comes into effect on the date when the tenderer receives one fully completed original copy signed between them of this document, including the Schedule of Deviations (if any).

Unless the tenderer (now Contractor) within five working days of the date of such receipt notifies the Employer in writing of any reason why he cannot accept the contents of this agreement, this agreement shall constitute a binding contract between the Parties.

Signature(s)

Name(s)

Capacity

for the Employer


(Insert name and address of organisation)

Date

Note: If a tenderer wishes to submit alternative tenders, use another copy of this Form of Offer and Acceptance.



Schedule of Deviations to be completed by the Employer prior to contract awardNote:

1. This part of the Offer & Acceptance would not be required if the contract has been developed by negotiation between the Parties and is not the result of a process of competitive tendering.

2. The extent of deviations from the tender documents issued by the Employer prior to the tender closing date is limited to those permitted in terms of the Conditions of Tender.

3. A tenderer’s covering letter must not be included in the final contract document. Should any matter in such letter, which constitutes a deviation as aforesaid be the subject of agreement reached during the process of Offer and Acceptance, the outcome of such agreement shall be recorded here and the final draft of the contract documents shall be revised to incorporate the effect of it.

No. Subject Details

1 [●] [●]

2 [●] [●]

3 [●] [●]

4 [●] [●]

5 [●] [●]

6 [●] [●]

7 [●] [●]

By the duly authorised representatives signing this Schedule of Deviations below, the Employer and the tenderer agree to and accept this Schedule of Deviations as the only deviations from and amendments to the documents listed in the Tender Data and any addenda thereto listed in the Tender Schedules, as well as any confirmation, clarification or changes to the terms of the Offer agreed by the tenderer and the Employer during this process of Offer and Acceptance.

It is expressly agreed that no other matter whether in writing, oral communication or implied during the period between the issue of the tender documents and the receipt by the tenderer of a completed signed copy of this Form shall have any meaning or effect in the contract between the parties arising from this Agreement.

For the tenderer: For the Employer

Signature

Name

Capacity

On behalf of

(Insert name and address of organisation) (Insert name and address of organisation)


Date



C1.2 ECC3 Contract DataPart one - Data provided by the Employer

Clause Statement Data

1 GeneralThe conditions of contract are the core clauses and the clauses for main Option

A: Priced contract with activity schedule

dispute resolution Option W1: Dispute resolution procedure

and secondary Options

X2 Changes in the law

X5: Sectional Completion

X7: Delay damages

X15: Limitation of Contractor’s liability for design to reasonable skill and care

X16: Retention

X18: Limitation of liability

Z: Additional conditions of contract

of the NEC3 Engineering and Construction Contract, April 2013 (ECC3)

10.1 The Employer is (Name): Eskom Holdings SOC Ltd (reg no: 2002/015527/30), a state owned company incorporated in terms of the company laws of the Republic of South Africa

Address Registered office at Megawatt Park, Maxwell Drive, Sandton, Johannesburg

10.1 The Project Manager is: (Name) Elmien Nolan

Address Private Bag X5009, Kriel, 2271

Tel 017 615 2369

Cell 072 285 3959

e-mail [email protected]

10.1 The Supervisor is: (Name) Kobus Vermeulen

Address Private Bag X5009, Kriel, 2271

Tel No. 017 615 2347

Fax No. 083 661 2987

e-mail [email protected]



11.2(13) The works are As per attached Works Information

11.2(14) The following matters will be included in the Risk Register

TimeQuality

11.2(15) The boundaries of the site are Contractor’s site office areaWalking area to working siteNorth & South Lime Plant as working site

11.2(16) The Site Information is in Part 4: Site Information

11.2(19) The Works Information is in Part 3: Scope of Work and all documents and drawings to which it makes reference.

12.2 The law of the contract is the law of the Republic of South Africa

13.1 The language of this contract is English

13.3 The period for reply is 3 working days

2 The Contractor's main responsibilities

Data required by this section of the core clauses is provided by the Contractor in Part 2 and terms in italics used in this section are identified elsewhere in this Contract Data.

3 Time11.2(3) The completion date for the whole of the

works is31 March 2017

11.2(9) The key dates and the conditions to be met are:

Condition to be met key date

Detailed Designs 6 weeks after contract award

1 100% completion of North Lime Plant

15 March 2017

2 100% completion of South Lime Plant

15 March 2017

30.1 The access dates are: Part of the Site Date

1 North Lime Plant As per access certificate

2 South Lime Plant As per access certificate

31.1 The Contractor is to submit a first programme for acceptance within

1 week of the Contract Date.

31.2 The starting date is (proposed) 01 November 2016

32.2 The Contractor submits revised programmes at intervals no longer than

Every Monday and Thursday mornings before 08:00

35.1 The Employer is not willing to take over the works before the Completion Date.

On completion of North Lime PlantOn completion of South Lime Plant

4 Testing and Defects



42.2 The defects date is 52 weeks after Completion of the whole of the works

43.2 The defect correction period is 2 days after access certificate issued

5 Payment50.1 The assessment interval is - As per sectional completion and agreed

programme dates during execution of project

- Material delivery and acceptance by Employer

51.1 The currency of this contract is the South African Rand

51.2 The period within which payments are made is

14/30 days after receipt of TAX invoice

51.4 The interest rate is the publicly quoted prime rate of interest (calculated on a 365 day year) charged from time to time by the Standard Bank of South Africa Limited (as certified, in the event of any dispute, by any manager of such bank, whose appointment it shall not be necessary to prove) for amounts due in Rands and

(ii) the LIBOR rate applicable at the time for amounts due in other currencies. LIBOR is the 6 month London Interbank Offered Rate quoted under the caption “Money Rates” in The Wall Street Journal for the applicable currency or if no rate is quoted for the currency in question then the rate for United States Dollars, and if no such rate appears in The Wall Street Journal then the rate as quoted by the Reuters Monitor Money Rates Service (or such service as may replace the Reuters Monitor Money Rates Service) on the due date for the payment in question, adjusted mutatis mutandis every 6 months thereafter and as certified, in the event of any dispute, by any manager employed in the foreign exchange department of The Standard Bank of South Africa Limited, whose appointment it shall not be necessary to prove.

6 Compensation events60.1(13) The place where weather is to be recorded

is:The document called “Site Information”

The weather measurements to be recorded for each calendar month are,

the cumulative rainfall (mm)

the number of days with rainfall more than 10 mm

the number of days with minimum air temperature less than 0 degrees Celsius

the number of days with snow lying at 09:00 hours South African Time



and these measurements:

The weather measurements are supplied by

South African Weather Bureau

The weather data are the records of past weather measurements for each calendar month which were recorded at:

Bethal Weather Station

and which are available from: the South African Weather Bureau and included in Annexure A to this Contract Data provided by the Employer

7 Title There is no reference to Contract Data in this section of the core clauses and terms in italics used in this section are identified elsewhere in this Contract Data.

8 Risks and insurance80.1 These are additional Employer's risks 1. Time

2. Quality

84.1 The Employer provides these insurances from the Insurance Table

as stated for “Format A” available on http://www.eskom.co.za/Tenders/InsurancePoliciesProcedures/Pages/EIMS_Policies_From_1_April_2014_To_31_March_2015.aspx (See Annexure B for basic guidance)

84.1 The Employer provides these additional insurances

as stated for “Format A” available on http://www.eskom.co.za/Tenders/InsurancePoliciesProcedures/Pages/EIMS_Policies_From_1_April_2014_To_31_March_2015.aspx (See Annexure B for basic guidance)

84.2 The minimum limit of indemnity for insurance in respect of loss of or damage to property (except the works, Plant, Materials and Equipment) and liability for bodily injury to or death of a person (not an employee of the Contractor) caused by activity in connection with this contract for any one event is

whatever the Contractor deems necessary in addition to that provided by the Employer.

84.2 The minimum limit of indemnity for insurance in respect of death of or bodily injury to employees of the Contractor arising out of and in the course of their employment in connection with this contract for any one event is

As prescribed by the Compensation for Occupational Injuries and Diseases Act No. 130 of 1993 and the Contractor’s common law liability for people falling outside the scope of the Act with a limit of Indemnity of not less than R500 000 (Five hundred thousand Rands).

9 Termination There is no reference to Contract Data in this section of the core clauses and terms in italics used in this section are identified elsewhere in this Contract Data.

10 Data for main Option clauseA Priced contract with activity schedule There is no reference to Contract Data in this

Option and terms in italics are identified



elsewhere in this Contract Data.

11 Data for Option W1W1.1 The Adjudicator is the person selected from the ICE-SA Division

(or its successor body) of the South African Institution of Civil Engineering Panel of Adjudicators by the Party intending to refer a dispute to him. (see www.ice-sa.org.za). If the Parties do not agree on an Adjudicator the Adjudicator will be appointed by the Arbitration Foundation of Southern Africa (AFSA).

W1.2(3) The Adjudicator nominating body is: the Chairman of ICE-SA a joint Division of the South African Institution of Civil Engineering and the London Institution of Civil Engineers. (See www.ice-sa.org.za ) or its successor body.

W1.4(2) The tribunal is: Arbitration.

W1.4(5) The arbitration procedure is the latest edition of Rules for the Conduct of Arbitrations published by The Association of Arbitrators (Southern Africa) or its successor body.

The place where arbitration is to be held is Johannesburg South Africa

The person or organisation who will choose an arbitrator - if the Parties cannot agree a choice or- if the arbitration procedure does not

state who selects an arbitrator, is

the Chairman for the time being or his nominee of the Association of Arbitrators (Southern Africa) or its successor body.

12 Data for secondary Option clauses

X2 Changes in the law There is no reference to Contract Data in this Option and terms in italics are identified elsewhere in this Contract Data.

X5 & X7 Sectional Completion and delay damages used together

X7.1X5.1

Delay damages for late Completion of the sections of the works are: section Description Amount per

day

1 Drawings R200 000.00

2 North Lime Plant R200 000.00

3 South Lime Plant R200 000.00

The total delay damages payable by the Contractor does not exceed: 15% of the value for each section

X15 Limitation of the Contractor’s liability for his design to reasonable skill & care

There is no reference to Contract Data in this Option and terms in italics are identified elsewhere in this Contract Data.

X16 Retention


http://www.ice-sa.org.za/

http://www.ice-sa.org.za/


X16.1 The retention free amount is Zero

The retention percentage is 10%

X18 Limitation of liability

X18.1 The Contractor’s liability to the Employer for indirect or consequential loss is limited to:

R0.00 (zero Rand)

X18.2 For any one event, the Contractor’s liability to the Employer for loss of or damage to the Employer’s property is limited to:

the amount of the deductibles relevant to the event described in the insurance policy format selected in the data for clause 84.1 above, which policy is available on http://www.eskom.co.za/Tenders/InsurancePoliciesProcedures/Pages/EIMS_Policies_From_1_April_2014_To_31_March_2015.aspx

X18.3 The Contractor’s liability for Defects due to his design which are not listed on the Defects Certificate is limited to

The greater of the total of the Prices at the Contract Date and the amounts excluded and unrecoverable

from the Employer’s assets policy for correcting the Defect (other than the resulting physical damage which is not excluded) plus R15M first amount payable in terms of the Employer’s assets policy.

X18.4 The Contractor’s total liability to the Employer for all matters arising under or in connection with this contract, other than excluded matters, is limited to:

the total of the Prices other than for the additional excluded matters.

The Contractor’s total liability for the additional excluded matters is not limited.

The additional excluded matters are amounts for which the Contractor is liable under this contract for

Defects due to his design which arise before the Defects Certificate is issued,

Defects due to manufacture and fabrication outside the Site,

loss of or damage to property (other than the works, Plant and Materials),

death of or injury to a person and infringement of an intellectual property

right.

X18.5 The end of liability date is (i) 7 years after the defects date for latent Defects and

(ii) the date on which the liability in question prescribes in accordance with the Prescription Act No. 68 of 1969 (as amended or in terms of any replacement legislation) for any other matter.

A latent Defect is a Defect which would not have been discovered on reasonable inspection by the Employer or the Supervisor before the defects date, without requiring any



inspection not ordinarily carried out by the Employer or the Supervisor during that period. If the Employer or the Supervisor do undertake any inspection over and above the reasonable inspection, this does not place a greater responsibility on the Employer or the Supervisor to have discovered the Defect.

Z The Additional conditions of contract are Z1 to Z12 always apply.

Z1 Cession delegation and assignment

Z1.1 The Contractor does not cede, delegate or assign any of its rights or obligations to any person without the written consent of the Employer.

Z1.2 Notwithstanding the above, the Employer may on written notice to the Contractor cede and delegate its rights and obligations under this contract to any of its subsidiaries or any of its present divisions or operations which may be converted into separate legal entities as a result of the restructuring of the Electricity Supply Industry.

Z2 Joint ventures

Z2.1 If the Contractor constitutes a joint venture, consortium or other unincorporated grouping of two or more persons or organisations then these persons or organisations are deemed to be jointly and severally liable to the Employer for the performance of this contract.

Z2.2 Unless already notified to the Employer, the persons or organisations notify the Project Manager within two weeks of the Contract Date of the key person who has the authority to bind the Contractor on their behalf.

Z2.3 The Contractor does not alter the composition of the joint venture, consortium or other unincorporated grouping of two or more persons without the consent of the Employer having been given to the Contractor in writing.

Z3 Change of Broad Based Black Economic Empowerment (B-BBEE) status

Z3.1 Where a change in the Contractor’s legal status, ownership or any other change to his business composition or business dealings results in a change to the Contractor’s B-BBEE status, the Contractor notifies the Employer within seven days of the change.

Z3.2 The Contractor is required to submit an updated verification certificate and necessary supporting documentation confirming the change in his B-BBEE status to the Project Manager within thirty days of the notification or as otherwise instructed by the Project Manager.

Z3.3 Where, as a result, the Contractor’s B-BBEE status has decreased since the Contract Date the Employer may either re-negotiate this contract or alternatively, terminate the Contractor’s obligation to Provide the Works.

Z3.4 Failure by the Contractor to notify the Employer of a change in its B-BBEE status may constitute a reason for termination. If the Employer terminates in terms of this clause, the procedures on termination are P1, P2 and P3 as stated in clause 92, and the amount due is A1 and A3 as stated in clause 93.

Z4 Ethics

Z4.1 Any offer, payment, consideration, or benefit of any kind made by the Contractor, which constitutes or could be construed either directly or indirectly as an illegal or corrupt practice, as an inducement or reward for the award or in execution of this contract constitutes grounds for terminating the Contractor’s obligation to Provide the Works or taking any other action as appropriate against the Contractor (including civil or criminal action).



Z4.2 The Employer may terminate the Contractor’s obligation to Provide the Works if the Contractor (or any member of the Contractor where the Contractor constitutes a joint venture, consortium or other unincorporated grouping of two or more persons or organisations) is found guilty by a competent court, administrative or regulatory body of participating in illegal or corrupt practices.

Such practices include making of offers, payments, considerations, or benefits of any kind or otherwise, whether in connection with any procurement process or contract with the Employer or other people or organisations and including in circumstances where the Contractor or any such member is removed from the an approved vendor data base of the Employer as a consequence of such practice.

Z4.3 Notwithstanding the provisions of core clause 90.2, the procedures on termination in terms of this clause are P1, P2 and P3 as stated in the core clause 92 and the amount due is A1 and A3 as stated in core clause 93.

Z5 Confidentiality

Z5.1 The Contractor does not disclose or make any information arising from or in connection with this contract available to Others. This undertaking does not, however, apply to information which at the time of disclosure or thereafter, without default on the part of the Contractor, enters the public domain or to information which was already in the possession of the Contractor at the time of disclosure (evidenced by written records in existence at that time). Should the Contractor disclose information to Others in terms of clause 25.1, the Contractor ensures that the provisions of this clause are complied with by the recipient.

Z5.2 If the Contractor is uncertain about whether any such information is confidential, it is to be regarded as such until notified otherwise by the Project Manager.

Z5.3 In the event that the Contractor is, at any time, required by law to disclose any such information which is required to be kept confidential, the Contractor, to the extent permitted by law prior to disclosure, notifies the Employer so that an appropriate protection order and/or any other action can be taken if possible, prior to any disclosure. In the event that such protective order is not, or cannot, be obtained, then the Contractor may disclose that portion of the information which it is required to be disclosed by law and uses reasonable efforts to obtain assurances that confidential treatment will be afforded to the information so disclosed.

Z5.4 The taking of images (whether photographs, video footage or otherwise) of the works or any portion thereof, in the course of Providing the Works and after Completion, requires the prior written consent of the Project Manager. All rights in and to all such images vests exclusively in the Employer.

Z5.5 The Contractor ensures that all his subcontractors abide by the undertakings in this clause.

Z6 Waiver and estoppel: Add to core clause 12.3:

Z6.1 Any extension, concession, waiver or relaxation of any action stated in this contract by the Parties, the Project Manager, the Supervisor, or the Adjudicator does not constitute a waiver of rights, and does not give rise to an estoppel unless the Parties agree otherwise and confirm such agreement in writing.

Z7 Health, safety and the environment: Add to core clause 27.4

Z7.1 The Contractor undertakes to take all reasonable precautions to maintain the health and safety of persons in and about the execution of the works. Without limitation the Contractor: accepts that the Employer may appoint him as the “Principal Contractor” (as defined and

provided for under the Construction Regulations 2014 (promulgated under the Occupational Health & Safety Act 85 of 1993) (“the Construction Regulations”) for the Site;

warrants that the total of the Prices as at the Contract Date includes a sufficient amount for proper compliance with the Construction Regulations, all applicable health & safety laws and regulations and the health and safety rules, guidelines and procedures provided for in this contract and generally for the proper maintenance of health & safety in and about the execution of works; and



undertakes, in and about the execution of the works, to comply with the Construction Regulations and with all applicable health & safety laws and regulations and rules, guidelines and procedures otherwise provided for under this contract and ensures that his Subcontractors, employees and others under the Contractor’s direction and control, likewise observe and comply with the foregoing.

Z7.2 The Contractor, in and about the execution of the works, complies with all applicable environmental laws and regulations and rules, guidelines and procedures otherwise provided for under this contract and ensures that his Subcontractors, employees and others under the Contractor’s direction and control, likewise observe and comply with the foregoing.

Z8 Provision of a Tax Invoice and interest. Add to core clause 51

Z8.1 Within one week of receiving a payment certificate from the Project Manager in terms of core clause 51.1, the Contractor provides the Employer with a tax invoice in accordance with the Employer's procedures stated in the Works Information, showing the amount due for payment equal to that stated in the payment certificate.

Z8.2 If the Contractor does not provide a tax invoice in the form and by the time required by this contract, the time by when the Employer is to make a payment is extended by a period equal in time to the delayed submission of the correct tax invoice. Interest due by the Employer in terms of core clause 51.2 is then calculated from the delayed date by when payment is to be made.

Z8.3 The Contractor (if registered in South Africa in terms of the companies Act) is required to comply with the requirements of the Value Added Tax Act, no 89 of 1991 (as amended) and to include the Employer’s VAT number 4740101508 on each invoice he submits for payment.

Z9 Notifying compensation events

Z9.1 Delete from the last sentence in core clause 61.3, “unless the Project Manager should have notified the event to the Contractor but did not”.

Z10 Employer’s limitation of liability

Z10.1 The Employer’s liability to the Contractor for the Contractor’s indirect or consequential loss is limited to R0.00 (zero Rand)

Z10.2 The Contractor’s entitlement under the indemnity in 83.1 is provided for in 60.1(14) and the Employer’s liability under the indemnity is limited.

Z11 Termination: Add to core clause 91.1, at the second main bullet point, fourth sub-bullet point, after the words "against it":

Z11.1 or had a business rescue order granted against it.

Z12 Addition to secondary Option X7 Delay damages (if applicable in this contract)

Z12.1 If the amount due for the Contractor’s payment of delay damages reaches the limits stated in this Contract Data for Option X7 or Options X5 and X7 used together, the Employer may terminate the Contractor’s obligation to Provide the Works using the same procedures and payment on termination as those applied for reasons R1 to R15 or R18 stated in the Termination Table.



Annexure A: One-in-ten-year-return weather data obtained from SA Weather Bureau for [weather station]

If any one of these weather measurements recorded within a calendar month, before the Completion Date for the whole of the works and at the place stated in this Contract Data is shown to be more adverse than the amount stated below then the Contractor may notify a compensation event.

Weather measurement

Month Cumulative rainfall (mm)

Number of days with rain more than 10mm

Number of days with min air temp < 0 deg.C

Number of days with snow lying at 08:00 CAT

[Other measurements if applicable]

January 200 6

February 150 6

March 120 5

April 110 4 5

May 40 3 10

June 20 2 20

July 20 2 31

August 30 2 10

September 60 3 2

October 140 6

November 160 7

December 170 6

Only the difference between the more adverse recorded weather and the equivalent measurement given above is taken into account in assessing a compensation event.



Annexure B: Insurance provided by the Employer

These notes are provided as guidance to tendering contractors and the Contractor about the insurance provided by the Employer. The Contractor must obtain its own advice. Details of the insurance itself are available from the internet web link given below.

1. For the purpose of works contracts, insurance provided by Eskom (the Employer) has been arranged on the basis of “project” or “contract” value, where the value is the total of the Prices at Completion of the whole of the works including VAT.

A “project” is a collection of contracts or work packages to be undertaken as part of a single identified capital expansion or refurbishment of a particular asset or facility.

A “contract” is a single contract not linked to or being part of a “project”.

2. For ECC3 there are three main “formats” of cover and deductible structure; Format A, Format B and Format Dx.

Format A is for a project or contract value less than or equal to R350M (three hundred and fifty million Rand) inclusive of VAT.

Format B is for a project or contract value greater than R350M .(three hundred and fifty million Rand) inclusive of VAT.

In the case of contracts / packages within a project:

For a contract / package of R50M which is part of a R400M project, Format B will apply For a contract / package of R250M which is part of a R6 billion project, Format B will apply; For a contract / package of R120M which is part of a R350M project Format A will apply;

For a contract which is not part of a project the same limits apply:

For a contract of R50M, Format A will apply For a contract of R355M, Format B will apply.

Format Dx applies only to Distribution Division projects and contracts. If a Distribution Division project or contract exceeds the Format A limit, the Eskom Insurance Management Services [EIMS] need to be contacted for advice on how to formulate the insurance cover. Cover and deductibles for Distribution Division are per the relevant policy available on the internet web link given below.

Format A generally applies to Transmission Division projects and contracts. If a Transmission Division project or contract exceeds the Format A limit, the Eskom Insurance Management Services [EIMS] need to be contacted for advice on how to formulate the insurance cover.

3. Tendering contractors should note that cover provided by the Employer is only per the policies available on the internet web link listed below and may not be the cover required by the tendering contractor or as intended by each of the listed insurances in the left hand column of the Insurance Table in clause 84.2. In terms of clause 84.1 “the Contractor provides the insurances stated in the Insurance Table except any insurance which the Employer is to provide”. Hence the Contractor provides insurance which the Employer does not provide and in cases where the Employer does provide insurance the Contractor insures for the difference between what the Insurance Table requires and what the Employer provides.

4. When the Marine Insurance is required the Contractor needs to obtain a copy of the latest edition of Eskom’s Marine Policies Procedures found at internet website given below.

5. Further information and full details of all Eskom provided policies and procedures may be obtained from:

http://www.eskom.co.za/live/content.php?Item_ID=9248


http://www.eskom.co.za/live/content.php?Item_ID=9248


C1.2 Contract DataPart two - Data provided by the Contractor

Notes to a tendering contractor:

1. Please read both the NEC3 Engineering and Construction Contract (April 2013) and the relevant parts of its Guidance Notes (ECC3-GN)2 in order to understand the implications of this Data which the tenderer is required to complete. An example of the completed Data is provided on pages 156 to 158 of the ECC3 (April 2013) Guidance Notes.

2. The number of the clause which requires the data is shown in the left hand column for each statement however other clauses may also use the same data

Completion of the data in full, according to Options chosen, is essential to create a complete contract.

Clause Statement Data10.1 The Contractor is (Name):

Address

Tel No.

Fax No.

E-mail

Fee percentage below works as follows: Compensation events : direct expenditure (subject to quotation acceptance) will be paid in full by Eskom plus this % fee)

11.2(8) The direct fee percentage is

The subcontracted fee percentage is

11.2(18) The working areas are the Site and

24.1 The Contractor's key persons are:

1 Name:

Job:

Responsibilities:

Qualifications:

Experience:

2 Name:

Job

Responsibilities:

Qualifications:

Experience:

2 Available from Engineering Contract Strategies Tel 011 803 3008, Fax 011 803 3009 or see www.ecs.co.za


http://www.ecs.co.za/


CV's (and further key persons data including CVs) are appended to Tender Schedule entitled

11.2(3) The completion date for the whole of the works is

11.2(14) The following matters will be included in the Risk Register

11.2(19) The Works Information for the Contractor’s design is in:

31.1 The programme identified in the Contract Data is

A Priced contract with activity schedule

11.2(20) The activity schedule is in

11.2(30) The tendered total of the Prices is (in figures)

excluding VAT

Data for Schedules of Cost Components

Note “SCC” means Schedule of Cost Components starting on page 60, and “SSCC” means Shorter Schedule of Cost Components starting on page 63 of ECC3 (April 2013).

A Priced contract with activity schedule Data for the Shorter Schedule of Cost Components



PART 2: PRICING DATAECC3 Option A

Document reference

Title No of pages

C2.1 Pricing assumptions: Option A 22

C2.2 The activity schedule 24



C2.1 Pricing assumptions: Option A

How work is priced and assessed for payment

Clause 11 in NEC3 Engineering and Construction Contract, (ECC3) Option A states:

Identified and defined terms

1111.2 (20) The Activity Schedule is the activity schedule unless later changed in

accordance with this contract.

(27) The Price for Work Done to Date is the total of the Prices for

each group of completed activities and each completed activity which is not in a group.

A completed activity is one which is without Defects which would either delay or be covered by immediately following work.

(30) The Prices are the lump sum prices for each of the activities on the Activity Schedule unless later changed in accordance with this contract.

This confirms that Option A is a lump sum form of contract where the work is broken down into activities, each of which is priced by the tendering contractor as a lump sum. Only completed activities are assessed for payment at each assessment date; no part payment is made if the activity is not completed by the assessment date.

Function of the Activity Schedule

Clause 54.1 in Option A states: “Information in the Activity Schedule is not Works Information or Site Information”. This confirms that specifications and descriptions of the work or any constraints on how it is to be done are not included in the Activity Schedule but in the Works Information. This is further confirmed by Clause 20.1 which states, “The Contractor Provides the Works in accordance with the Works Information”. Hence the Contractor does not Provide the Works in accordance with the Activity Schedule. The Activity Schedule is only a pricing document.

Link to the programme

Clause 31.4 states that “The Contractor provides information which shows how each activity on the Activity Schedule relates to the operations on each programme which he submits for acceptance”. Ideally the tendering contractor will develop a high level programme first then resource each activity and thus arrive at the lump sum price for that activity both of which can be entered into the activity schedule.

Preparing the activity schedule

Generally it is the tendering contractor who prepares the activity schedule by breaking down the work described within the Works Information into suitable activities which can be well defined, shown on a programme and priced as a lump sum.

The Employer, in his Instructions to Tenderers or in a Tender Schedule, may have listed some items that he requires the Contractor to include in his activity schedule and be priced accordingly.

It is assumed that in preparing his activity schedule the Contractor:



Has taken account of the guidance given in the ECC3 Guidance Notes pages 19 and 20; Understands the function of the Activity Schedule and how work is priced and paid for; Is aware of the need to link the Activity Schedule to activities shown on his programme; Has listed and priced activities in the activity schedule which are inclusive of everything necessary

and incidental to Providing the Works in accordance with the Works Information, as it was at the time of tender, as well as correct any Defects not caused by an Employer’s risk;

Has priced work he decides not to show as a separate activity within the Prices of other listed activities in order to fulfil the obligation to complete the works for the tendered total of the Prices.

Understands there is no adjustment to the lump sum Activity Schedule price if the amount, or quantity, of work within that activity later turns out to be different to that which the Contractor estimated at time of tender. The only basis for a change to the Prices is as a result of a compensation event.

An activity schedule could have the following format:

ItemNo.

Programme Reference

Activity description Price



C2.2 the activity schedule

Contractor’s activity schedule will be reflected here with contract award.



Price List

100 PRELIMINARY & GENERAL Unit Quantity Rate Amount

101 Site establishment Sum

102SHEQ Budget (PPE, Induction, Medicals,

Safety File)Sum

103 Management (Project and Quality) Sum

104 Equipment and Tools Sum

105 Accommodation Months 5

106 Transport – (maximum 120km per day) Km

107 Scaffolding Sum

108 Lifting Equipment / Cranes Sum

109Training for Eskom Personnel &

DocumentsSum

110 De-establishment Sum

Sub-Total

200 WORK FORCE (LABOUR)

201 Welders Sum

202 Labourers Sum

203 Safety Officer / Supervisor Sum

204 Quality Officer Sum

205 Process Engineer Sum

206 Mechanical Engineer Sum

207 Civil Engineer Sum

208 Electrical Engineer Sum

209 C&I Engineer Sum

Sub-Total

300SUPPLY AND INSTALLATIONS INCLUDINGS WORKS INFORMATION

301 New Lime Silos for North and South Sum

302 Mixing Chambers for North and South Sum

303 Motive Water Supply for North and South Sum

304Supply the Civil Engineering Materials to

support the SilosSum



305 Civil Works Sum

30630Mpa Concrete bases for the North and

South SilosSum

307 C & I Works Sum

308 Electrical Works Sum

Sub-Total

400 SUNDRIES

401 Interfacing with existing plant Sum

402 Corrosion Protection Sum

403 AKZ Coding/Labelling Sum

404Commissioning, testing and Optimisation

of the whole systemSum

405 Detailed Designs for Construction Sum

406 Actual Survey & Report Sum

407 Other Sum

Sub-total

100 Preliminary & General R

200 Work Force R

300 Supply & Installation R

400 Sundries R

Total Rand Value excluding VAT

……………….…………………….Print Name

…………………………………….Signature

………………………………………Date



PART 3: SCOPE OF WORK

Document reference

Title No of pages

This cover page 27

C3.1 Employer’s Works Information 28

C3.2 Construction 51

Total number of pages



C3.1: Employer’s works Information1 DESCRIPTION OF THE WORKS

1.1 Executive overview Kriel Power Station has been experiencing various problems on both their lime softening plants on the North and South sides of the power station. These problems include an incorrect source of motive water; insufficient mixing between the lime silo and the dilution tanks; and no redundancy on the lime silos.

The objective of this project is to increase the availability of the lime softening plant, on both the North and South side, and ensure effective operation of the plant for the treatment of cooling water.

This document is utilised to provide the technical specifications for the works, which includes: addition of a lime silo to the system; the addition of a mixing chamber between the lime silo and the dilution tanks to optimize

mixing; and the change of motive water source from fire water to cooling tower make-up water at

Kriel Power Station North and South Lime softening plants.

The existing site for the lime plants will be utilized at Kriel Power Station. Refer to drawing 0.45/58834 sheet 1 for the new South Silo Plant and drawing 0.45/58834 sheet 2 for the new North Silo Plant Layouts.

Work To Be Performed By Contractor

The Contractor designs, procures, supplies, manufactures, delivers to site, installs, and commissions and tests the entire works to ensure a fully functional system.

1.1.1 Scope Of The Work

The Scope of Work describes the major activities and plant and material that falls within the scope of the Contractor. It is the responsibility of the Contractor to ensure that all the activities are carried out and all equipment, plant and material is supplied to complete the Works in every respect.

Major activities to be carried out by the Contractor of which the works comprises of the following: a) Detail Design for Constructionb) Manufacture and procurement c) Delivery to and offloading at site d) Installation e) AKZ labelling f) Corrosion protection g) Interfacing with existing plant h) Commissioning, testing and optimisation i) Initial training of Employer’s personnel in the operation and maintenance of the systemj) Documentation as specified k) Quality management for all activities l) Safety and plant signage m) Storage on site.



All plant, material and equipment is required to be designed for operation in a power plant environment with a minimum requirement for maintenance and operator intervention. It is not the intention of this scope of work to describe in detail all the activities the Contractor is required to carry out, nor to describe in detail everything to be supplied by the Contractor

1.1.2 Battery Limits

Process The boundaries of the process start at the point where the lime is offloaded into the silos and terminates after the dilution tanks where the lime slurry exits. This will include the modification of the motive water system. This applies to both the North and South side of the Power Station.

Mechanical Battery limits will start from the point lime material enter silo to the point it discharges through rotary vane feeder and is fed to the lime mixing slurry chamber to the inlet of the dilution tanks. The water supply will start at the raw water make up lines to the cooling towers and end at the mixing slurry chamber.

Civil and Structural The Civil scope will deal specifically with the design of the new silo and modification of the existing silo, and relevant works information including the addition of new motive pump foundation.

Electrical The electrical boundary is on the 380V CW Clarification plant boards, north and south to the Lime plant auxiliaries.

C&I C&I boundary ranges from start to finish of the lime softening water treatment process. This includes possible interfaces existing control systems, such as common plant, fire protection, etc. as well as new control equipment.

1.2 Employer’s objectives and purpose of the worksKriel Power Station has two lime plants, North and South, which treat the alkalinity and hardness of the raw water caused by carbonates. The raw water is used for cooling purposes as cooling water in the condenser and other auxiliaries. The purpose of the refurbishment for both the North and South Lime Plant is aimed at achieving the following:

a) To change the supply of motive water for lime slurry from fire water to raw water.b) To add an additional stand-alone silo for redundancy.c) To optimize the mixing of the lime slurry before it enters the dilution tanks.

All equipment should be designed for the remaining operational life of Kriel Power Station.

1.3 CIVIL ENGINEERING AND STRUCTURAL WORKS Civil And Structural Scope Of Work

1.3.1 Introduction This Section describes the following: a. The civil and structural work activities which are within the scope of the Contractor.



b. Civil works information and designs and all necessary interface requirements that are provided by the Contractor.

The Contractor ensures that all structures, drainage, and service routes which are incorporated in this contract are functionally and efficiently located and that each structure/component is sized for optimum space usage.

The Contractor submits the design calculations and drawings of the building/civil items which are within this scope of work for review and acceptance by the Project Manager. No construction is started prior to acceptance by the Project Manager. The Project Manager requires 14 days for review.

1.3.2 Scope Of Work

1.3.2.1 General This specification describes the following: a. The detail civil design and construction to be done by the Contractor for foundations, plinths, buildings, roads, earthworks and supporting structures of the Kriel lime plant refurbishment. This includes the; • Silo support structure buildings • Water tank foundation slabs • Access roads • Road crossings • Pipeline supports and servitude • Drainage in and around all structures • Modification to affected existing plant.b. Structural analyses and verification of any existing structures required for re-use. c. The supply of detailed design, construction drawings, design reports and construction specifications for the construction of the Kriel lime plant refurbishment project. d. Corrosion protection and design of the finishes of the plants and equipment in accordance with the current architectural design and paint colour specification of Kriel Power Station. e. All necessary interface requirements and liaison which are required by the Contractor. Details and drawings of any buildings and civil works which are not expressly included in this Contract but which, in the opinion of the Contractor, will be necessary for the completion and proper execution of the project are included by the Contractor and submitted to the Project Manager for acceptance. The Contractor indicates clearly his proposed scope regarding these additional items.

1.3.2.2 Geotechnical Investigations The Contractor will perform a geotechnical investigation for input into the civil engineering designs. The geotechnical investigation will provide all necessary geotechnical parameters required for the design of infrastructure as stated below.

1.3.2.3 Design Phase Services provided by the Contractor in the design phase include: a. Complete design in accordance with the requirements of the works. b. Detailed design of the Silo concrete support structure buildings with the staircases. c. Detailed design of the water tank foundation slabs. d. Detailed design of the pipe support structures from the Silos to the dilution tanks. e. Detailed design of access roads to provide access to the new Silo buildings. f. All roads must be designed to have a minimum bearing capacity of 250kPa plus a safety factor of 1.5. The roads is required to have a gravel wearing coarse and provision of culverts must be made in all areas where roads will cross storm water trenches, pipelines or any other services. Provision is required to also be made for temporary road crossing during the construction of the permanent crossing to ensure access to all required areas.



g. Detailed design and provision for diverting any storm water drainage affected by the implementation of this project. h. Detailed design of all earthworks and terracing required for the implementation of this project. i. Sizing and optimizing of the different components. All calculations relating to the civil work and all drawings are prepared and submitted to the Project Manager. Calculations are arranged in a logical sequence and include such sketches and annotations as may be required to make them self-explanatory. Calculations clearly identify the subject of the calculations and include, but are not be limited to the following information: a. Project name b. Contractor’s name c. Contract No. d. Date of calculation e. Revision No. f. Name of the item g. Page No. h. Assumptions used for design purposes i. Codes and standards used j. Computer programmes used k. Loading imposed by structures, plant and equipment during the erection, commissioning, operation and maintenance l. Safety factors and combinations of loads used m. Calculations of all components n. Settlement of plant and equipment foundations o. Reference sources (including text books and design manuals used) p. Reference to the appropriate drawings q. Selected materials and finishes r. Manufacturer’s technical specifications

The foundations and structures will be designed for the worst combination of dead loads, construction live loads, plant loads, seismic load with peak ground acceleration in accordance with SANS 10160 Part 4, impact and dynamic effects due to operation of plant, maintenance loads, earth pressure, wind loads and temperature effects. Drawings prepared by the Contractor include complete construction details including: a. General arrangement layouts b. Layouts and sections of the different components c. Reinforcements drawings and schedules d. Construction joint schedules e. Details of embedded parts f. Details of the support structures and fixings g. Structural steel detailing and corrosion protection h. Details of all plinths, openings, box-outs, holding down arrangements, grouting, connections etc. required for plant and equipment. i. As built drawings The Contractor is responsible for the detail design of the Works and is responsible to ensure that the design satisfies the structural, dynamic, seismic, acoustic, hydraulic, safety and environmental requirements of all permits and statutory obligations, as applicable in South African laws. The Contractor submits his design calculations, specifications and drawings of the civil items which are within his scope of work for review to the Project Manager. All calculations are submitted in electronic format, with any assumptions made during the design clearly listed. The Contractor supplies details of the computer programs used and any certification of approval by independent authorities are given for the programs used. Drawings are submitted in Microstation CAD format.



1.3.2.4 Prior to Fabrication and Construction Electronic copies of all design calculations and electronic copies of all drawings are submitted for acceptance to the Project Manager, before the relevant fabrication or construction work is carried out. In addition one set of hardcopies of all drawings and calculations are provided. Approval of the Contractor’s drawings or calculations by the Project Manager is required to not relieve the Contractor of any of his obligations to meet all the requirements of the Contract or relieve the Contractor of his responsibility for the adequacy of design, calculations and drawings. A detailed Construction Work Programme, broken down to specific tasks and time allocated for completion of each task is required to be submitted.

1.3.2.5 Fabrication and Construction The works to be provided by the Contractor include: a. Provision of all embedded anchor bolts, sleeves, anchors and other miscellaneous embedded parts required for the installation of all plant and structural steel work, including if necessary setting templates required for the placement of anchor bolts/embedment.

b. Provision of all scaffolding, site craneage, lifting equipment, etc. which are required by the Contractor. c. Excavations and casting of all foundations and plinths for the project. d. Construction of all earthworks and terracing required. e. Construction of the Silo support structure. f. Construction of access roads, including road crossings and drainage infrastructure. Provision is required to also be made for temporary road crossing during the construction of the permanent crossing to ensure access to all required areas. g. Construction of Water tanks foundation slabs. h. Grouting of all structural steelwork. The Contractor is required to provide details of materials and method of grouting including epoxy type non-shrink materials for acceptance by the Project Manager. i. Testing of the welding work to be done in accordance with SANS 1200H Section 7.3 and allowance also has to be made for Magnetic Particle Inspection testing. j. Corrosion protection of the steel supporting structures and embedded parts. k. Provision of expansion joints where required. The Contractor ensures that all concrete works are of suitable strength, the minimum strength of structural concrete is 35MPa. Finishing to be smooth steel shutter or steel float. All corners to be chamfered 20x20mm. Jointing design and material are suitable for the generally high/low temperature conditions on site, to minimize shrinkage and joint failure. Resealing of the joints is not more often than once every 5 years. All reinforced concrete structures are required to be designed in accordance with SANS 10100. The construction of all reinforced structures, including the production, transport, placing, sampling and testing of concrete, the cutting, bending and fixing of reinforcement, the design, erection and quality of formwork, the curing of concrete, stripping of formwork etc. is required to be governed by the requirements of the relevant sections of SANS 1200. Concrete may be produced from an on-site batching plant or, if available, from a local ready mix plant. Concrete is required to be placed promptly after batching.

Sampling of concrete test cubes and slump tests is required to take place at the point of deposition.



1.4 MECHANICAL ENGINEERING WORKSNorth And South New Lime Silo Scope Of Work

The scope is for the detail engineering designs, selection, procurement, fabrication, workshop assembly, testing, inspection, labelling, packing, delivery to site, erection, project management, cold and hot commissioning of the entire engineering works to ensure an independent fully functional lime silo on both the North and South side of the Plant.

1.4.1. General Requirements The Contractor’s design:

• To comply with the requirements of the Works Information. • To be carried out by suitably qualified and experienced personnel. • To be carried out to world-class, best engineering practice. • The Contractor supplies wall thickness calculations for the entire silo system to the Project

Manager for review. • The Contractor provides DEM modelling for the entire silo system.

Prior to submission to the Project Manager, the design is approved by a suitably qualified competent person, professionally registered with an internationally recognised engineering body, in the relevant engineering discipline. Design calculations should clearly identify the subject of the calculations and include, but are not limited to the following information: a. Project name b. Contractor’s name c. Contract No. d. Date of calculation e. Revision No. f. Name of the item g. Page No. h. Assumptions used for design purposes i. Codes and standards used j. Computer programmes used k. Loading imposed by structures, plant and equipment during the erection, commissioning, operation and maintenance l. Safety factors and combinations of loads used m. Calculations of all components n. Settlement of plant and equipment foundations o. Reference sources (including text books and design manuals used) p. Reference to the appropriate drawings q. Selected materials and finishes r. Manufacturer’s technical specifications

1.4.1.1 Mild Steel Silo Requirements The Contractor Scope: The Contractor designs, fabricates and installs the mild steel silo with a volumetric capacity of 85m3 with an aerated conical hopper and an extraction fan on the roof of the silo. The mild steel silo is constructed from mild steel sheets with a minimum thickness determined

by the Contractor to withstand the possible loads as per design standard. The internal surfaces of all hoppers are free of all welding slag, ledges or other protrusions

which may contribute to coal build-up in the hopper.



1.4.1.2 Aeration System Requirements The Contractor designs, manufactures and installs the aeration air system on the mild steel silo

hopper. The contractor will verify the required number of aeration pads and arrangement, aeration air

pressure, air quality.

1.4.1.3 Actuated Knife Gate Valve Requirements The Contractor designs, fabricates and installs a knife gate valve supplied which will operate as

per employer specification. The gate valve is required to be pneumatically actuated.

1.4.1.4 Rotary Vane Feeder a. The Contractor designs, manufactures and installs the rotary vane feeders as specified by the employer. b. The rotary vane feeder is electrically driven by a variable speed chain drive.

1.4.2 MECHANICAL HYDRAULIC SCOPE OF WORK

1.4.2.1 System Overview The main objective of water supply is to provide adequate water for the lime plant at Kriel Power Station. This water supply shall be tapped off from the raw water makeup system. It shall be used for the lime slaking process. Estimated pressure of supply is 600kPa(g) with a flow of 34.5m3/hr. The system overview diagram is illustrated in Figure 4. The scope of work for the project entails design, supply, installation, testing and commissioning of the upgraded lime plant pumping system. This includes but is not limited to: • Installation of a tap-off line from the raw water makeup system (including pipework and

associated valves) • Installation of Buffer Tank (including pipework and associated valves) • Installation of Pumps Suction from Buffer Tank (including pipework and associated valves) • Installation of Pumps • Installation of Pipework to the mixing chamber • Installation of the mixing chamber • Installation of Pipework from mixing chamber to Dilution Tanks • Installation of tapping points for pressure transmitters on the pipes • Testing and commissioning of the pumping system and associated valves and mechanical

mixer • Supply as built drawings and documentation of the complete design to Eskom • Supply test certificates, commissioning procedures, data sheets, testing procedures and

maintenance manuals to Eskom

GENERAL MECHANICAL REQUIREMENTS: SCOPE

1.4.2.1.1 Pipework The Contractor is responsible for supplying all pipework. Pipework includes pipes, pipe-supports, flanges, adaptor mountings, fittings and associated equipment deemed necessary to ensure a safe reliable and efficient workable system. The Contractor is responsible for noting the requirements of commonality of supply/type in so far as possible. All pipework are supplied by a certified manufacturer whose equipment has been proven for similar or more demanding duties. All pipework are tested in accordance with the relevant codes and standards to match the existing pipework at the power station. The velocity criteria remains at a maximum permissible velocity of 2.5m/s and minimum velocity which is higher than the deposition(settling) velocity of the fluid. A pressure drop of not more than 50kPa per 100m of pipe. Data books, to include all necessary material and test certificates maintained as part of the QA documentation and made available for inspection if so requested by the Project Manager



The pipework shall be able to convey raw water from the raw water makeup system, via a buffer tank to the mixing chamber. Pipe work from the mixing chamber shall be designed convey lime slurry to the dilution tanks. The pipes shall have corrosion protection in accordance with the transported fluid. Pipework shall comply with the following standards

Carbon steel Piping: • SANS 62-1 Steel Pipes Part 1: Pipes suitable for threading and of nominal size not exceeding

150 mm.(Recommended for above ground piping smaller or equal to 150 NB); • SANS 719 Electric welded carbon steel pipes for aqueous fluids (large bore) (Recommended

for above ground piping larger than 150 NB); • ASME B36.10M, Welded and Seamless Wrought Steel Pipe; • Carbon steel fittings: • SANS 14 (ISO 49), Malleable cast iron fittings threaded to ISO 7-1 • SANS 62-2, Steel Pipes Part 2: Screwed pieces and pipe fittings of nominal size not exceeding

150 mm.(Recommended for above ground piping smaller or equal to 150 NB); • BS EN 10253, Butt welding pipe fittings Part 1: Wrought carbon steel for general use and

without specific inspection requirements; • BS EN 10253, Butt welding pipe fittings Part 2: Non alloy and ferritic alloy steels with specific

inspection requirements • JIS B 2304, Steel butt-welded pipe fittings for ordinary use • ASME B16.9, Factory-Made Wrought Steel Butt welding Fittings • Fabricated fittings (e.g. Mitre bends) must comply with the design code used. • Carbon Steel Flanges • SANS 1123, Pipe flanges • BS EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and

accessories, PN designated Part 1: Steel flanges • ASME B16.5, Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch

Standard

HDPE piping: • SANS 4427-2/ISO 4427-2, Plastic piping systems-Polyethylene (PE) pipes and fittings for water

supply. Part 2: Pipes; • Fittings to suite HDPE piping: • SANS 4427-3/ISO 4427-3, Plastic piping systems-Polyethylene (PE) pipes and fittings for water

supply. Part 3: Fittings • Flanges to suite HDPE piping • SANS 4427-3, Plastic piping systems-Polyethylene (PE) pipes and fittings for water supplyAll

welding jobs shall meet the requirements of Control of the following standard; 240- 56241933: Welding during Construction, Repair and Maintenance Activities Standard.

1.4.2.2.2 Tank The Contractor is responsible for supplying all Tanks. The Contractor is responsible for noting the requirements of commonality of supply/type in so far as possible. All tanks are supplied by a certified manufacturer whose equipment has been proven for similar or more demanding duties. All tanks are tested in accordance with the relevant codes and standards. Data books, to include all necessary material and test certificates maintained as part of the QA documentation and made available for inspection if so requested by the Project Manager The tank shall store process water for a period of at least 1 hour. The location of tank should be in close proximity to the lime plant area. The tank may be of plastic or metal construction. Tanks shall be designed according to applicable guides, codes and standards. All required nozzles for inflow, outflow, breathing, cleaning, overflow etc. needs to be specified as well as the requirements for manholes for inspection and cleaning. Applicable Codes and Standards to be selected for design, fabrication and construction of tank suitable for water distribution systems:



• SANS 10329, The design and construction of sectional steel tanks for storage of liquids at or above ground level

• BS EN 14015, Specification for the design and manufacture of site built, vertical, cylindrical, flat-bottomed, above ground, welded, steel tanks for the storage of liquids at ambient temperature and above

• SANS 53121, GRP tanks and vessels for use above ground

Tank bases and supports are to be designed according to the applicable Eskom Civil Standards

1.4.2.2.3 Pumps A pump shall supply the required flowrate at the pressure required by the mixing chamber. The required flowrate is 34.5m3/hr. The pumps shall have a 100% redundancy. The pumps shall meet the requirements of the Eskom Centrifugal Pumps Specification [240-56030558]. All pumps must be of standard manufacture and proven reliability in similar service conditions. Complete details of all pumps, motors and auxiliary equipment being offered to complete the works in accordance with design codes and specifications should be provided by the Contractor. Each pump assembly is supplied complete with electric motors, couplings, seals, bearings, piping and fittings, valves, instrumentation, orifices, gears, leak-off equipment as necessary, drains and all components necessary for safe and efficient operation. Each pump operates without undue strain or wear and without damage to any part of the pumping unit. It is the responsibility of the Contractor to determine the exact type of pump design which will provide such service without operating difficulty or undue replacement of parts and ensure maximum availability, reliability, efficiency and optimisation of power of the works. All parts of each pump unit are designed to withstand stresses resulting from a full voltage start of the motor. The Contractor is responsible for determining that each pump and driver operates in dynamic balance as a unit without undue vibration according to applicable vibration standards.

1.4.2.2.4 Valves The Contractor is responsible for supplying all valves, adaptor mountings, fittings and associated actuators deemed necessary to ensure a safe reliable and efficient workable system. The Contractor is responsible for noting the requirements of commonality of supply/type in so far as possible. All valves are supplied by a certified manufacturer whose equipment has been proven for similar or more demanding duties. All valves shall meet the requirements of the Eskom Standard for Low Pressure Valves [240-105020315]. Data books, to include all necessary material and test certificates maintained as part of the QA documentation and made available for inspection if so requested by the Project Manager. Normally operated valves are positioned for ease of operation and maintenance from permanent floors, galleries or access platforms. So far as practicable valve maintenance/ replacement of wearing parts are possible in-situ. Special consideration is given to the operating mechanism and correct lubrication of all valves to ensure a minimum of maintenance and ease of operation. All valves shall be furnished with nameplates, which are easily readable and of lasting construction. All isolating and control valves shall have a position indicator on the valve yoke to indicate whether they are open or shut. All valves are functionally tested at manufacturer’s facilities and test certificates are maintained as part of the QA documentation. The Contractor is responsible for providing control valves including the associated electrical equipment specified in (Controls & Instrumentation and Electrical Technical Specification) and as required to make the systems complete and functional.

1.4.2.2.5 Couplings All mechanical couplings are of the solid type.



1.4.2.2.6 Seals The Contractor ensures that arrangements are made to prevent any leakage.

1.4.2.2.7 Bearings The Contractor ensures that Journal bearings have horizontal joint and are housed to facilitate their easy removal without

the necessity for removing casings. Lubricating oil is provided to all bearings and in sufficient quantity to ensure that an adequate

lubrication is achieved; it shall be done according to the OEM’s lubrication specification. The bearing housing prevents prevent oil or oil vapours from leaking out and air from leaking

in. Sight glasses are located on all bearing drains and are easily read and accessible.

1.4.2.2.8 Mixing chamber The mixing chamber shall have the capability to mix a liquid and a solid to form a homogenous solution. The solid shall be dry lime powder with physical properties listed in Table 5. The liquid shall be raw water with properties listed in Table 2. The mixing shall occur on a continuous basis. The concentration requirements are listed in Table 3.

1.5 ELECTRICAL SCOPE OF WORK1.5.1 Motors And Drives The motors and VSD procured shall comply with the following Employer specifications: • 240-56357518 – Power station electric motors procurement • 240-56360387 – Storage of motors • 240-56359660 – Standard Specification for Medium-Voltage Motor-Switching Devices • SANS 61800 – Adjustable Speed drives

Motors must comply to the appropriate hazardous location requirements even for those located in areas where flammable gas or vapours may be present even if only under certain conditions which include leaking pipes.

1.5.2 Cabling And Racking The Contractor utilises the existing cable racks. Should modifications via extensions of cable racks present themselves the following specification is adhered to: • 240-53114214 – Cable and racking

1.5.3 LV Switchgear The Contractor shall interface with the current 380V Clarification North and South boards. The Employer identifies spare switchgear buckets at these boards to be utilised. The Contractor provides new 380V Switchgear buckets on the Clarification boards which will cater for the supply of the additional loads on the lime plants. The electrical power supplies available at Kriel Power Station for the Lime Plant are: 380V – 3 phase – 50Hz 230 V – single phase – 50 Hz The Contractor adheres to the standard 240-56227516, LV Switchgear Control Gear Assembly Associated Equipment for Voltage 1000V AC and 1500V Standard

Table: Spare circuits North (Plant AKZ’s) South (Plant AKZ’s) 05-00VB12D005KP01 05-00VB22D005KP01 05-00VB12D006KP01 05-00VB22D006KP01 05-00VB12D007KP01 05-00VB22D007KP01 05-00VB12D004KM01 05-00VB22D004KM01



05-00VB12D002 05-00VB22D002 1 × Spare spaces 2 × Spare spaces

• BS 479, Part 8: 1972, Test methods and Criteria for the Fire Resistance of Building Construction Elements.

• IEEE 634: 1978, Testing for Fire Rated Penetration Seals • ASTM E814: Fire Test of through Penetration Fire Stops

1.5.4 Lighting And Small Power The Contractor complies with 240-55714363: Coal Fired Power Stations Lighting and Small Power Installations Standard as a minimum.

1.5.4.1 Design Illumination Levels The illumination levels used are those recommended by SANS 10114-1, “Interior lighting”. These recommendations are specified and are law under the OHS Act. The Occupational Health and Safety Act (OHS Act) specify minimum illumination levels for safety.

1.5.5 Earthing And Lightning Protection All new equipment is earthed to station earth mat. The earthing installations shall comply to the following Employer and International specifications: • 240-56356396 – Earthing and Lightning Protection • IEC 60694

1.5.6 Templates • 240-56176097 - Electrical Cable Schedule Template • 240-56227927 - Electrical Load List Template • 240-56356421 - Electrical LV Switchgear Schedule Template • 240-77100923 - New LV Motor Technical Schedule AB Template • Design details of Low Voltage variable speed drives

The Contractor must complete the above templates and submit during tender phase.

1.6 Process Control and IT worksKriel Power Station has two lime softening plants; one on the North side and one on the South side. Each facility consists of a lime silo where lime is fed through a rotary vane feeder and it is then transported by making use of an eductor and motive water to the dilution tanks where further mixing will take place. The lime mixture from the dilution tanks is fed into the centre well of the clarifier.

Cooling water treatment technologies are employed at Power Stations to reduce the volume of effluent leaving the cooling system in the form of cooling tower blow downs, thus maintaining the water balance on the station. The cooling water treatment also aims to reduce the scaling potential of cooling water within the circuit, in order to protect the materials of construction of the condensers and the cooling water circuit. During the cooling process the chemical species within the cooling system concentrates. The number of times the water can concentrate within the cooling circuit in order to comply with the specified Chemistry Standard, is termed the cycles of concentration (COC). Once the optimum COC have been reached i.e. the threshold of the species is reached (determined from the Chemistry Standard for Cooling Water (240-55864767) a portion of the cooling water must be removed as a blow down in order to maintain the cooling water chemistry. Lime softening generally allows for a higher number of COC to be achieved, which results in a lower volume of blow down production. This technology is employed at Kriel power Station.



Due to problems that include an incorrect source of motive water; insufficient mixing between the lime silo and the dilution tanks; and no redundancy on the lime silos, the lime softening system is not operating optimally. This decreases the health of the cooling water drastically and results in scaling and condenser tube leaks.

There are 3 main areas that were identified for modification. These are for the motive water and pumps; educator and pre-mixing zone; and the additional silo.

1.6.1 Motive Water And Pumps The current system uses fire water as a source for motive water. This is not allowed since the fire water system should be maintained at a constant pressure. Potable water is used as fire water and the average quality taken from May 2014 to March 2015 is shown in the Table below.

Table: Average fire water quality Parameter Unit Quality Calcium mg/kg 18.03 Magnesium mg/kg 14.72 Total hardness mg/kg 32.75 Conductivity μS/cm 82.83 M-alkalinity mg/kg 20.04 Sodium mg/kg 5.39 pH 7Turbidity NTU 1.14

1.6.2 Design Criteria The following values shown in the Table below are required to be achieved in the entire cooling water system per side.

Table: Plant Specifications Description Value

pH 10.5 (Expected) Total maximum flow per clarifier 950 m3/h Clarifier up-flow velocity at maximum flow 3.8 m/h Residual alkalinity of softened water < 40 mg/ℓ (as CaCO3)

1.7 CONTROLS & INSTRUMENTATION SCOPE OF WORK1.7.1 General The existing Siemens S7-300 PLC and cubicle will be expanded as required to deliver the Works. New IO cards will be installed to interface with new equipment. The existing 24V DC power supply has sufficient spare capacity. The 24V DC power distribution should be expanded as required.

1.7.2 HMI Requirements The existing Siemens S7-300 PLC is interfaced to an integrated HMI touch screen. The touch screen interface will be supplied with the following minimum requirements: a. Colour touch screen size of 10 inches b. Resolution of 640 x 480 pixels c. Ingress Protection (IP) rating of 67 d. Direct interface to the PLC e. Graphical display of plant overview and each functional area. f. Alarm and event screens g. All measured values must be displayed



h. On-load adjustment of all set points by the Operator

1.7.3 Field Equipment Requirements 1.7.3.1 Instruments To match the current plant all field instruments must be supplied by Endress & Hauser Consult AG. Refer to Section 9.7 for a detailed list of required instruments. Ranges and installation positions must be determined by the Contractor as part of the Works. Instrument specifications: 1. HART compatible 2. Output of 4-20mA 3. IP67 or better 4. Local display for pressure, flow and level measurements.

1.7.3.2 Actuators To match the current plant all electrical actuators must be supplied by Auma GmbH. Refer to Section 9.8 for a detailed list of required instruments. Sizing and torque specification must be determined by the Contractor as part of the Works. Electrical actuator requirements: 1. IP67 or better 2. 380V 3 phase power 3. Internal switchgear 4. Local control panel with Local remote switch, Open/Close buttons, position and alarm lights 5. Hand wheel

1.7.3.3 Standards The Contactor is required to comply with the following standards as per Appendix A: • 240-56355754 Field Instrument Installation Standard • 240-56355815 Field Instrument Installation Standard for Junction Boxes and Cable

Termination • 240-56355843 Pressure Measurement Systems Installation Standard

1.7.3.4 Limits Of Supply And Services As per appendix B, Proposed changes to be submitted with tender.

1.7.3.5 IO Blocks As per appendix B, Proposed changes to be submitted with tender.

1.7.3.6 Intrument List As per appendix B, Proposed changes to be submitted with tender.

1.7.3.7 Drive And Actuator List As per appendix B Proposed changes to be submitted with tender.

1.7.3.8 Control And Instrumentation Documentation Design freeze documentation Loop diagrams per field instrument Logic Diagrams with detailed process descriptions Datasheets of all supplied equipment



1.8 Interpretation and terminologyDetail Design Process to develop and issue Approved for Construction documents and

drawings in accordance with the Design Base, including Quality Control, Quality Assurance, and Change Management.

System An integrated set of constituent pieces that are combined in an operational or support environment to accomplish a defined objective. These pieces include people, hardware, software, firmware, information, procedures, facilities, services and other support facets.

The Works The works is inclusive of the Kriel Lime Softening Plant and all the activities necessary to increase the availability of the lime softening plant on both the North and South side, and ensure effective operation of the plant for the treatment of cooling water as specified in the Technical Specifications. The Works is to provide specifications to the contractor for the design, supply, construction and commissioning of a refurbishment on the North and South Lime plants at Kriel Power Station.

Employer This refers to the relevant Eskom employee as confirmed by the Project Manager.

The following abbreviations are used in this Works Information:

Abbreviation Meaning given to the abbreviation

AFC Approved for construction

OBL Outside battery limits

AKZ Anlagen Kenn Zeichnungs

BMH Bulk Materials Handling

C&I Control and Instrumentation

CAD Computer Aided Drawing

CD Compact Disc

DEM Digital Elevation Model

EDWL Engineering Design Work Lead

e.g. Example

ISO International Standards Organisation

kPa Kilopascal

LDE Lead Discipline Engineer

OHSA Occupational Health and Safety Act

Rev Revision

ROM Read-Only Memory

SANS South African National Standards

SHEQ Safety Health Environmental and Quality



2 ENGINEERING AND THE CONTRACTOR’S DESIGN

2.1 Employer’s designOperating, Control And Maintenance PhilosophyModes of Operation The normal mode of operation for the lime plant is lime dosing will operate at a constant volume flowrate with variable lime concentration. The lime dosing rate is determined by the pH in the clarifiers. The pH control is manual and the operator needs to adjust the lime dosing rate set point to increase or decrease the pH in the clarifiers. The dosing rate is varied by controlling the speed of the rotary vane with the VSD motor control. The set point will be adjustable from the HMI.

Contractors Scope The Contractor is responsible for the provision of a detailed Operating, Control and maintenance philosophy as per the Contractors detailed design and submits this to the Project Manager for review prior to commencing with the construction activities. The Operating and Control philosophy conform to the Employer’s format for such a document. This philosophy below defines the framework upon which the operation and control of the works is required to be based. The philosophy highlights, the basic operating and control functions required for the works.

Operating and Control Philosophy Lime dosing will operate at a constant volume flowrate with variable lime concentration. Due to raw water conditions changing it might be necessary to adjust the lime concentration from time to time. The lime dosing rate is determined by the pH in the clarifiers. The pH control is manual and the operator needs to adjust the lime dosing rate set point to increase or decrease the pH in the clarifiers. The dosing rate is varied by controlling the speed of the rotary vane with the VSD motor control. The existing dry rotary feeder is an AC controlled unit and is variable from 20% to 100% of the maximum 400kg/hr capacity. The set point will be adjustable from the HMI. The dry feeder is also equipped with a heating element. Only the dry feeder capacity is adjusted and the motive water pump will always pump at the same rate to avoid blockages. After calibration of the rotary feeder, the new calibration curve should be put into the PLC control and a radio control loop should be set-up to control the lime dosing rate to a ratio of the feed flow rate entering the clarifiers. The feeder displaces the lime into a mixing chamber from where it is added to the motive water. The mixture is fed to the top of the first set of dilution storage tanks (two tanks) which then overflow through a connection line at the bottom of the tanks to the second set dilution storage tanks. In the second set of dilution storage tanks, the slurry is diluted with softened water from the soft water sump. The soft water sump is fed with water from the clarifiers. From the second set of dilution storage tanks the lime solution flows to the two clarifiers where it is mixed with 10% of the cooling water from the cooling towers. The dilution storage tanks are equipped with ultrasonic level switch and agitators. The agitator will always be active unless switched off from the HMI or tripped or low level active. The softened water feed into the lime slurry tank will be controlled with ball float valve.The cone of the lime silo is equipped with fluidizing-air nozzles. These devices are operated by compressed air. The air supply to these nozzles is pulsated by solenoid valves. This keeps the lime in the silo moving and prevents build-up and blockages. The operation of the fluidizing-air nozzles is continuous. The optimum pressure is determined experimentally when the system is online.



Shutdown procedure Lime silo operation shall be alternated between the two silos (current silo and new silo) every 5 days. The silo changeover can also be initiated manually from the HMI. When a silo has been taken out of operation, motive water should continue to feed into the system before being switched off. This is necessary for flushing. The flushing sequence will flush the mixing chamber and lime slurry delivery lines up to dilution tanks. During a flushing sequence the motive water inlet valve will remain open while the lime rotary vane feeder motor is shutoff. The air supply to the offline silo shall be shut off immediately. The flushing sequence duration will be 15 minutes which will be set on the HMI.

Offloading procedure Lime is pneumatically offloaded into a lime silo from the lime truck with its own compressor. The lime filling line isolation valve will be equipped with a proximity switch as seen in Drawing 0.45/58974. When the lime offloading commence, the proximity switch must activate the start-up of the vent filter extraction fan situated on top of the lime silo. The air will be vented through the vent filter, which will be cleaned by a reverse air pulse when required. The operation of the vent filter will be timer controlled. The vent filter extraction fan and pulse controller will be active. After the lime silo filling sequence has been completed, the proximity switch on the isolation valve will indicate that the valve is closed. This will stop the extraction fan motor on the vent filter while the air pulse controller will continue to operate for a pre-set time. This time can be adjusted on the HMI.

Maintenance Philosophy The contractor is required to provide preventative maintenance plan for the system.

2.2 Parts of the works which the Contractor is to design

3.2.1 Design Requirements

Design of the works includes, but is not limited to, the following basic requirements:

In designing the works, the Contractor takes due cognisance of existing plant and equipment as well as environmental, safety and housekeeping constraints at Kriel Power Station. It is the responsibility of the Contractor to overcome any issues that may arise due to space constraints with prior consent from the project management. Adequate access needs to be provided for all new plant and existing plant for inspection, testing, operating and maintenance purposes.

The Contractor is fully responsible for integrating his design with the existing installed plant and equipment.

The Contractor procures and provides all mechanical, civil, electrical and process control Plant, Equipment and Material required for the works as defined in this Works Information. This includes interfacing with and utilisation of existing plant and equipment.

The Contractor provides all relevant welding procedures for acceptance by the Project Manager.

In designing the works, the Contractor is responsible to familiarise himself with and take cognisance of the layout, design and operation of Kriel Lime Plant.

The Contractor submits all detail design calculations and information for approval by the Project Manager.



All Plant, Equipment and Material supplied are designed with due regard for the need for effective operation under variances in water qualities encountered.

The Contractor is responsible for acquainting himself with these variances. The materials of construction of all components of the works are to be suitable for use under the varied process conditions as well as in the different ambient conditions of the Kriel area.

In providing the Works, the Contractor is fully responsible for the delivery to, offloading and storage on Site of all Plant, Equipment and Materials required for the works. The Project Manager reserves the right to carry out any checks of his own on any Plant, Equipment and Materials that has been delivered to Site for the works.

The Contractor is fully responsible for the installation of all mechanical, civil, electrical, process control Plant, Equipment and Material as well as the interfacing and tie-in with existing plant and equipment as required for the works in accordance with policies and procedures applicable at Kriel Power Station.

The Contractor provides safe access to all installed Plant and Equipment to the lime plant for maintenance purposes.

In providing the Works, the Contractor takes note of and complies with the following general requirements with regard to documentation:

* All documents and correspondence and all wording on drawings must be in English. The Contractor is responsible for any errors or misunderstanding arising from any translations made by the Contractor or their agents and officers.

* All drawings and reports compiled for the works are to become the property of the Employer on completion of the works.

* The Contractor must provide a comprehensive reference list of installed Plant, not more than 5 years old, and includes contact names, telephone numbers and e-mail addresses. The Employer reserves the right to visit or communicate with the users of one or more of the referenced Plants in order to assess and verify the accuracy of the information supplied by the Contractor.

* The Contractor must provide comprehensive technical schedules for all installed Plant, Equipment and Materials required for the works outlining specific details of all main components.

* Material safety data sheets are required to be submitted, where applicable. * Contractors are to keep the system design and operation as simple as possible. Factors

such as quick and easy maintenance, inspection doors, readily removable parts, lifting lugs as well as standardised, locally manufactured components, are to be at the fore front of all design considerations. Contractors is required to bring to Eskom’s attention all special maintenance features, for acceptance.

The Contractor is required to supply any items, components or services to render the lime plant complete and serviceable on the starting date of commissioning. The Contractor is required to submit a list indicating all items that are maintenance intensive, require cleaning, inspection etc. The frequency of this maintenance and/or inspection and/or cleaning and a description of the work involved are required to be included with the tender. The Contractor is required to submit lists indicating expected life of all components and ensure spares availability for the next 15 years, or specify the period that spares will be available. Life cycle costing will be taken into consideration during tender evaluation.



3.2.2 Hazop Study The Contractor carries out formal Hazard and Operability (HAZOP) Studies on all systems in their supply. These studies are done in accordance with the requirements as laid down in the Eskom HAZOP Guideline: 240-49230111.

The Employer’s personnel as well as the Contractor are present during the HAZOP study.

3.2.3 Spares The Contractor is required to provide a complete list of recommended spares. This list should include the prices of the item and its availability over the life of the plant.

The prices quoted is required to include for packing, delivery to and off-loading at site, inspection and testing and adequate protection against corrosion, damage and weathering during transit and storage.

3.2.4 Performance Guarantees

The Contractor guarantees and demonstrates, through specified acceptance tests the operational performance of the works.

The Contractor is required to indicate the full extent of the guarantees they are prepared to offer with respect to volumetric flow, efficiency and availability. The following will apply as a minimum: a) Motive water supply for lime dilution will be 100% available and reliable. b) The Contractor is required to maintain the pH for the lime system at a pH 10.1. This is

the pH of the water exiting the cooling water clarifiers. c) The contractor is to ensure that lime slurry of 5-7% concentration is dosed into the

clarifiers automatically. d) The Contractor is required to ensure that the lime plant system must have an

availability of 95%. The Contractor is required to note the Employer’s concern regarding the deterioration of performance outside the plant guarantee period.

3.2.5 Proving Period After completion of the Contractor’s preliminary trials and commissioning, and completion of the acceptance test to the Employer’s satisfaction, the plants will be taken over by the Employer and continue in normal service for a period defined in the Contractor data.

During this proving period the Contractor is required to optimise all aspects of the operation of the plants and is required to be responsible for any defect resulting from faulty design, material and workmanship and is required to remedy such defects at his own expense and as soon as possible when called upon to do so by the Employer.

Any outage of sections of the Lime Plants required by the Contractor during this period is required to, as far as practicable, be arranged to suit the convenience of the Employer. The duration of the outage must be supplied to the Employer in advance (at least 1 week) so that necessary arrangements can be made.

Where actual consumables (if applicable) are used to obtain satisfactory operation of the plants exceed the guaranteed quantities stated in the schedules, the Contractor at his own expense is required to carry out all necessary adjustments and modifications to the plants to reduce the excess consumables used to within the stated tolerance.

Fully detailed proposals is required to be submitted in writing to the Employer for acceptance before any adjustments and modifications are made and work in this respect is



required to be carried out when convenient to the Employer and is required to not interfere with the operational requirements of the plants.

All adjustments and modifications are required to be subject to inspection and acceptance by the Employer.

When adjustments and modifications are complete the Contractor is required to advise the Employer in writing to this effect and is required to apply for a further acceptance test. From the results obtained, and provided that the Employer is satisfied that they will be lasting, the plants will be finally accepted by the Employer.

3.2.6 Standards, Specifications And Procedures

The Contractors design is required to be in accordance with the appropriate design standards and codes of practice defined by the Employer.

The Contractor ensures that the Works complies fully with all South African Government Ordinances, all relevant local rules and regulations and with current national standards.

The International Standards Organisation (ISO) system of units must be used throughout this contract. This includes, but is not limited to documentation, correspondence, drawings, measurement and equipment sizing.

Pressure parts and pipework design must comply with the appropriate British, American or German codes.

The following non-exhaustive list of specific codes and standards has been identified that should be followed. This list is further expanded in Appendix A. The standards, specifications and all procedures listed below form part of this contract. The Employer reserves the right to add to this list should the proposal differ significantly from the proposed design as highlighted in this specification. All other standards and specifications used by the Contractor must be listed and accepted for use by the Employer’s representative.

Legislative Compliance

All the laws and regulations of South Africa apply. In particular attention should be paid to the following: • Occupational Health and Safety Act No.85 of 1993 Regulations • Construction and Building Regulations • Environmental Regulations • Compliance to ISO9001 • Compliance with all current legislation and Eskom policies and directives is mandatory. • Eskom’s current safety standards and Kriel Power Station safety, health and

environmental procedures and policies shall be adhered to at all times. • Ensure that the technical requirements are met according to Eskom Generation

policies and standards. • Supplier Contract Quality Requirements Specification, S. Tjabadi, QM-58.

Civil & Structural Standards

The following standards will be used during the design of the civil structures: • SANS 10100 -1:2000 - The structural use of concrete Part 1: Design • SANS 10160-3:2011 - Basis of structural design and actions for buildings and industrial

structures Part 3: Wind actions



• SANS 10160-4:2011 - Basis of structural design and actions for buildings and industrial structures Part 4: Seismic actions and general requirements for buildings

• BS EN 1– 4: 2006 - Eurocode 1 – Actions on Structures Part 4: Silo and Tanks • SANS 10162 – 1: 2011 - The structural use of steel Part 1: Limit-states design of hot-

rolled steelwork • COLTO Standard Specifications for Road and Bridge Works for State Authorities 1998 • SANS 50196 Methods of testing cement • SANS 121 Hot dip galvanized coatings on fabricated iron and steel articles -

Specifications and test methods • SANS 920 Steel bars for concrete reinforcement • SANS 1083 Aggregates from natural sources - Aggregates for concrete • SANS 10400 The application of National Building Regulations • SANS 2001 CC: 2007 Concrete works (Structural) • AWS D1.1 American Welding Society - Structural Welding Code – Steel

Mechanical Hydraulics standards

The Mechanical Installation is to comply with the following standards and guidelines:

Applicable National and International Standards

• SANS 347: Categorization and conformity assessment criteria for all pressure equipment

• ISO/DIS 3458: Assembled joints between fittings and polyethylene (PE) pressure pipes -Test of leak proofness under internal pressure.

• SANS 32: Internal And/or External Protective Coatings For Steel Tubes - Specification For Hot Dip Galvanized Coatings Applied In Automatic Plants

• SANS 62-2: Steel Pipes - Part 1: Pipes Suitable For Threading And Of Nominal Size Not Exceeding 150 mm

• SANS 62-1: Steel Pipes - Part 2: Screwed Pieces And Pipe Fittings Of Nominal Size Not Exceeding 150 mm

• SANS 664: Wedge Gate And Resilient Seal Valves For Waterworks - Part 1: General • SANS 719: Electric Welded Low Carbon Steel Pipes For Aqueous Fluids (Large Bore) • SANS 776 Class 125: Copper Alloy Gate Valves - Heavy Duty • SANS 815-1: Shoulder-Ended And Groove-Ended Piping Systems - Part 1: Shoulder-

Ended Steel Pipes, Fittings And Coupling • SANS 815-2: Shoulder-Ended And Groove-Ended Pipe Systems - Part 2: Groove-

Ended Steel Pipes, Fittings And Coupling • SANS 1056-3: Ball Valves - Part 3: Light Duty Valves (Not Fire-Safe) • SANS 1109-1: Pipe Threads Where Pressure-Tight Joints Are Made On The Threads -

Part 1: Dimensions, Tolerances And Designation • SANS 1117: Plastics Wrappings For The Protection Of Steel Pipelines • SANS 1123: Pipe flanges • SANS 1356: Fixed Electric Instantaneous Water Heaters • SANS 1412: Standard Specification For Polyolefin Pipe And Fittings For Corrosive

Waste Drainage Systems • SANS 2001 DP-2: DP-2: Construction works – Part DP2: Medium pressure pipelines • SANS 4427: Polyethylene (pe) Pipes For Water Supply – Specifications • SANS 10269: Welding of thermoplastics – Testing and approval of welder • SANS 10140-3: Identification Colour Markings - Part 3: Contents Of Pipelines • AS 3774-1996: Loads on bulk solids containers • ISO 5208-2015: Industrial valves • ISO 8573.1. 2001: Air Quality Classifications • 240- 56241933: Welding during Construction, Repair and Maintenance Activities

Standard



Mechanical Standards for Lime Silo:

• AS 3774-1996, Loads on bulk solids containers • ISO 5208-2015, Industrial valves • ISO 8573.1. 2001, Air Quality Classifications • Control and Instrumentation Standards: • 240-56355754 Field Instrument Installation Standard • 240-56355815 Field Instrument Installation Standard for Junction Boxes and Cable

Termination • 240-56355843 Pressure Measurement Systems Installation Standard

Electrical Standards: • 240-56357518 – Power station electric motors procurement • 240-56360387 – Storage of motors • 240-56359660 – Standard Specification for Medium-Voltage Motor-Switching Devices • 240-53114214 – Cable and racking • 240-56227516, LV Switchgear Control Gear Assembly Associated Equipment for

Voltage 1000V AC and 1500V • SANS 10177-2, Fire testing of materials, components and elements used in buildings

Part 2: Fire resistance test for building elements. • BS 479, Part 8: 1972, Test methods and Criteria for the Fire Resistance of Building

Construction Elements. • IEEE 634: 1978, Testing for Fire Rated Penetration Seals • ASTM E814: Fire Test of through Penetration Fire Stops • 240-55714363: Coal Fired Power Stations Lighting and Small Power Installations

Standard as a minimum. • SANS 10114-1, “Interior lighting” • Occupational Health and Safety Act (OHS Act) • 240-56356396 – Earthing and Lightning Protection • IEC 60694

Eskom Chemistry Standards: • 240-55864767 Chemistry and Microbiology Standard for Condenser Cooling Water

2.3 PROCEDURE FOR SUBMISSION AND ACCEPTANCE OF CONTRACTOR’S DESIGNNotes Regarding Processes Requested

Main Offer The Contractor is required to tender an offer, as his main offer, including any additional processes which may, in the Contractor’s opinion, be required for the correct intended functioning and operation of the Contractor’s design.

Inclusion or exclusion of any process is required to be accompanied by a full technical and financial justification for acceptance by the relevant Eskom engineer.

The tender is required to include a full cost breakdown for each of the processes, with major items of equipment being accounted separately. Minor items of equipment may be bundled together under a single cost allocation; however, an inventory of items thus bundled is required to be provided.

The Contractor is required to provide detailed capital and life-cycle costing (including labour, maintenance and operational costs) for the main and any alternative offers, with a breakdown for the processes included.



2.4 OTHER REQUIREMENTS OF THE CONTRACTOR’S DESIGNI.4.1. Configuration Management

3.4.1.1 Plant Codification

The AKZ Keypart is required to be used by the Contractor for classifying and designating both Plant and their associated documents. The rules for applying the AKZ codes are contained in the AKZ Standards that is required to be provided by the Employer. The Contractor is required to use Kriel Power Station Labelling Specification ECM0004 and Kriel Power Station Plant Codification Manual ECM0005, which will be advised after Signing of the Contract Agreement.

The Contractor is required to code all Plant within scope of supply according to the AKZ Classification system to component level. The Employer is required to provide the Plant Breakdown Structure with plant, systems and equipment coded up to the level of design. The relevant AKZ codes thus allocated is required to appear on all Plant related documentation, sswtt, lists and correspondence.

The Contractor will be responsible for plant codification of all new systems, equipment and components that form part of the design. In order to codify the plant and its documentation, the Contractor must make use of the relevant codification standard provided by Employer. Unless otherwise stated, the codification is required to be limited to the lowest component level of coding and is required to apply to all systems included in the contract.

The Contractor is required to be responsible for ensuring the accuracy, completeness and consistency of the designations in all documents. This applies both to designations within documents (Plant designations) and of documents (document designations). The Contractor is required to submit these for the Employer’s approval.

The Contractor is required to provide the Employer with outline drawings or diagrams showing the Contractor's reference coding for systems and equipment as per schedule of submittals.

3.4.1.2 Plant Labelling

The Contractor is required to manufacture and install labels according to the Kriel Power Station Labelling Specification ECM0004 and Kriel Power Station Plant Codification Manual ECM005 that will be proved as well. Any abbreviations to plant descriptions is required to be prepared in accordance to the Employer’s abbreviation standard. Detailed nameplate or label lists with the service legends and including the AKZ Code is required to be prepared by the Contractor and submitted to the Employer for review and comment before commencing the manufacture of the labels.

3.4.1.3 Engineering Change Management

All Design change management is required to be performed in accordance to the latest revision of the Eskom Project Change Management Procedure (240-53114026) and the Employer is required to ensure that Contractor is provided with latest revisions of this procedure. Any uncertainty regarding this procedure should be clarified with the Employer and clarification updates should be reflected in updated versions of this procedure.



2.5 USE OF CONTRACTOR’S DESIGNDetail design calculations, simulations and drawings to be submitted to the Employer for approval before any construction work will commence. The calculations and simulations will be submitted in a Microsoft Excel Spreadsheet. The drawings will be submitted in a CED format (version to be confirmed doing negotiations and approved by Employer.After approval the calculations & simulations will be the property of the Employer.

2.6 DESIGN OF EQUIPMENTAs per the Scope of Work

3 LIST OF DRAWINGS

3.1 Drawings issued by the EmployerAs per the scope of work. The Employer will provide these drawings during the procurement process.

The Contractor submits 4 (four) prints of all drawings to the Project Manager for acceptance. The Contractor awaits acceptance by the Project Manager prior to commencement of

manufacture and/or erection work on Site. ALL approved drawings will be supplied electronically in Bentley Microstation V8 (.dgn) format

or CAD. The electronic file conforms to the requirements of Standard GGS 0315. Drawings will be to scale 1:1 on drawing sheet size A1. The colour yellow must not be used. As build drawings is required to be submitted within 4 weeks of Completion to the Project

Manager for his acceptance.

Drawings prepared by the Contractor include complete construction details including: a. General arrangement layouts b. Layouts and sections of the different components c. Reinforcements drawings and schedules d. Construction joint schedules e. Details of embedded parts f. Details of the support structures and fixings g. Structural steel detailing and corrosion protection h. Details of all plinths, openings, box-outs, holding down arrangements, grouting,

connections etc. required for plant and equipment. i. As built drawings

3.2 EQUIPMENT REQUIRED TO BE INCLUDED IN THE WORKSThe Contractor will use their own equipment designed for the specific works.

3.3 AS-BUILT DRAWINGS, OPERATING MANUALS AND MAINTENANCE SCHEDULES

Operating And Maintenance (O&M) Manuals

The Contractor provides good quality operating and maintenance manuals prepared by suitably experienced personnel. Four copies of the first draft manuals as well as all “as built” drawings are submitted to the Project Manager for review and acceptance. Manuals are in English and each manual is complete with the Power Station’s name, contract number and



index. The Contractor must also provide a CD ROM copy of these documents on Microsoft Word for Windows. All accepted drawings are available before safety clearance.

Manuals contain, as a minimum, all aspects required for training (as outlined in Section 13). The manuals should indicate the level of responsibility of the operating personnel for each action in the procedures. Included in these manuals are the following: a) Design data including descriptions of control philosophy with alarms, set-points,

interlocks and logics clearly explainedb) Process and instrumentation diagrams c) Range, calibration factors, calibrations certificates, data sheets, etc., for all control and

instrumentation equipment d) Electrical diagrams e) General arrangement and installation drawings and instructions f) Operating procedures and instructions for normal and emergency conditions, including

flow diagrams g) Maintenance procedures and instructions for specific plant and equipment h) All drawings required for component location, dismantling and re-assembly for

maintenance i) Equipment details such as make, model, type, specifications, etc. j) Detailed parts lists and ordering instructions pertaining to storage of spare parts or to

their shelf lifek) Exploded view type drawings clearly detailing the part and uniquely identifying it,

technical descriptions of the equipment and component parts l) Catalogues, schedules and other product support documents m) Troubleshooting and fault finding guide n) Safety procedures and instructions o) All special tools and equipment required for maintaining and operating the works

The maintenance manuals are required to be separated into mechanical and electrical volumes.

The manuals are required to be designed such that they can be clearly understood by technical, maintenance and operating personnel.

The technical manuals is required to include fully detailed descriptions, as-built drawings, diagrams, illustrations, schedules and data for use by Eskom technical staff to evaluate performance, trace faults, adjust, maintain and fully understand the plant and plant equipment and to all satisfactory training of junior staff in conjunction with the operating manuals.

The operating manuals are required to be set out in simple terms in ordinal, tabular or pictorial form to provide factual and concise descriptions of:

I. How to carry out start-up, shut-down, and service operation of the plants by automatic, semi-automatic and by manual control.

II. What happens when the plants are operated, e.g. where does the water, chemical, air, etc flow when a sequence is initiated or a valve is operated.

III. What an alarm condition implies and how it is corrected. IV. What problems can occur and how they are overcome. V. A routine visual plants inspection procedure.

The operating manuals are intended for daily use and therefore required to be separated from the technical and maintenance manuals. Bold print, diagrams, illustrations, etc is required to be used. Materials are required to be suitable for heavy duty, preferably covered with protective transparent material, and be in loose leaf form to allow substitution and addition of pages.



The maintenance instruction manuals is required to include schedules to cover plant inspection procedures, fully detailed maintenance programmes for plant and plant equipment services at daily, monthly, three monthly, six monthly , yearly and any other necessary intervals, and contain manufacturer’s and supplier’s detailed maintenance and lubrication instructions, diagrams, sectional drawings giving part numbers, descriptions, etc. Where spare parts have been provided theses should be coloured in, scheduled, and their filling procedure described. The manual is required to also include minimum surveillance requirements for the plant.

Detailed maintenance procedures, covering removal, dismantling, replacement of parts, re-erection, checking, and reassembly and re-commissioning is required to be included for all equipment. The re-commissioning is required to be included for all equipment. The maintenance manual is required to be fully comprehensive and cover all plants and plant equipment installed. As the manuals will be frequently used for training and maintenance, they is required to be prepared similarly to those described for the operating instruction manuals for use by operating personnel.

4 MANAGEMENT AND START UP.

4.1 Management meetings

During execution, daily meetings will be held at the Employer’s Site. The times for the meeting will be as per agreement by both parties. Ad-hoc meetings may be called by the Project Manager as the need arises i.e. compensation event meeting, assessment meeting.

4.2 Documentation controlGeneralAll documentation shall be controlled as per the requirements of the Supplier Contract Quality Requirements Specification QM58. All existing documentation that is affected by the condenser re-tube project shall be updated as part of the documentation of the project.The documentation requirements cover the various stages of the works, from the engineering stages, through installation and the commissioning, operating, maintenance and training stages of the project. Comprehensive document control of all documents is provided for the duration of the works.

The documentation register contains the following information and is submitted monthly to the Project Manager:- Documentation number (Employer and maker’s number).- Revision.- Approval status.- Location of documentation at that stage.- Documentation description.

All documentation submittals are accompanied by a documentation transmittal advice. Microsoft Office 2007 or later version soft copies, together with hard copies of each document, are provided. All documentation to operate and maintain the Lime Plant shall be updated as part of the documentation of the project.All new documentation shall be registered on the Kriel Power Station Documentation system.Kriel Power Station shall issue all new document numbers.



The documentation system shall be updated to reflect the cancelled status of obsolete/redundant documentation.The document control system contains, as a minimum, the revision status of all documents in relation to the 'As Built' plant status.

Engineering DocumentationAll engineering documentation is stored, classified and accessed via a structured document hierarchy and document numbering system in the EDMS. The engineering documentation always reflects the latest change or modification. Older revisions of engineering documentation are retained and stored with the relevant revision information for a user defined period. All engineering documentation is produced using a documentation management system to ensure an accurate reflection of the system configuration and status at all times. All engineering documents managed by the document management system are dynamic.

2.1.1 Engineering Document Management System Any configuration change made to hardware and software is subsequently reflected in

all engineering documentation. The documents produced and maintained are an integral part of the project. No

ambiguity or inconsistency exists between the programs/software loaded on the control system and the engineering documentation.

Automatic prevention of duplication of numbering or ambiguity is built into the system.

The system contains master templates for each type of document produced or maintained.

4.3 HEALTH AND SAFETY RISK MANAGEMENT2.3.1 Employer’s Health And Safety Requirements

The Contractor acts in accordance with the health and safety requirements stated in the Works Information.

In carrying out its obligations to the Employer in terms of this contract; in providing the Works; in using Plant, Materials and Equipment; and while at the Site for any reason, the Contractor complies and procures and ensures the compliance by its employees, agents, Sub-Contractors and mandatories with:

a) the provisions of the Occupational Health and Safety Act 85 of 1993 (as amended) and all regulations in force from time to time in terms of that Act (“the OHSA”); and

b) the Eskom “Safety, Health and Environmental Requirements for Contractors” document attached to the Works Information (as amended from time to time) and such other Eskom Safety Regulations as are applicable to the Works and are provided in writing to the Contractor (collectively “the Eskom Regulations”). The Eskom Regulations may be amended from time to time by the Project Manager and all amendments will be provided in writing to the Contractor. The Contractor complies with the provisions of the latest written version of the Eskom Regulations with which it has been provided; and

c) the health and safety plan prepared by the Contractor in accordance with the SHEQ Requirements. (The OHSA and the Eskom Regulations are collectively referred to as the “SHEQ Requirements”.)

The Contractor, at all times, considers itself to be the “Employer” for the purposes of the OHSA and is required to not consider itself under the supervision or management of the Employer with regard to compliance with the SHEQ Requirements, the Contractor is



required to furthermore not consider itself to be a subordinate or under the supervision of the Employer in respect of these matters. The Contractor is at all times responsible for the supervision of its employees, agents, Sub-Contractors and mandatories and takes full responsibility and accountability for ensuring they are competent, aware of the SHEQ Requirements and execute the Works in accordance with the SHEQ Requirements.

The Contractor ensures that all statutory appointments and appointments required by any Eskom Regulations are made and that all appointees fully understand their responsibilities and is trained and competent to execute their duties. The Contractor supervises the execution of their duties by all such appointees.

The Employer, or any person appointed by the Employer, may, at any stage during the currency of this contract: II. Conduct health and safety audits regarding all aspects of compliance with the SHEQ

Requirements, at any off-site place of work, or the site establishment of the Contractor;

III. Refuse any employee, Sub-Contractor or agent of the Contractor access to the premises if such person has been found to commit an unsafe act or any unsafe working practice or is found not to be qualified or authorised in terms of the SHEQ Requirements;

IV. Issue the Contractor with a stop order should the Project Manager become aware of any unsafe working procedure or condition or any non-compliance with any provision of the SHEQ Requirements.

The Contractor immediately reports any disabling injury as well as any threat to health or safety of which it becomes aware at the Works or on the Site to the Project Manager and to the Safety Risk Management office.

The Contractor appoints a person, qualified in accordance with the SHEQ Requirements, as the liaison with the Eskom Safety Officer for all matters related to health and safety, this person is required to be contactable 24 hours a day.

The Contractor confirms that it has been provided with sufficient written information regarding the health and safety arrangements and procedures applicable to the Works to ensure compliance by it and all employees, agents, Sub-Contractors or mandatories with the SHEQ Requirements while providing the Works in terms of this contract. As such, the Contractor confirms that this contract and the relevant Eskom Regulations referred to in this contract constitute written arrangements and procedures between the Contractor and the Employer regarding health and safety for the purposes of section 37(2) of the OHSA.

The Contractor agrees that the Employer is relieved of any and all of its responsibilities and liabilities in terms of Section 37(1) of OHSA in respect of any acts or omissions of the Contractor, and the Contractor’s employees, agents or Sub-Contractors, to the extent permitted by the OHSA.

The Contractor hereby indemnifies the Employer and holds the Employer harmless in respect of any and all loss, costs, claims, demands, liabilities, damage, penalties or expense that may be made against the Employer and/or suffered or incurred by the Employer (as the case may be) as a result of, any failure of the Contractor, its employees, agents, Sub-Contractors and/or mandatories to comply with their obligations in terms of this clause 18, and/or the failure of the Employer to procure the compliance by the Contractor , its employees, agents, Sub-Contractors and/or mandatories with their responsibilities and/or obligations in terms of or arising from the OHSA.

2.3.2 Contractor’s Responsibilities



In addition to the safety requirements identified under responsibility in terms of safety requirements, the Contractor ensures that the following responsibilities are complied with:

a) To meet on a regular basis, as agreed, with the Project Manager / Supervisor who are responsible for: I. Safety assurance II. Quality assuranceIII. Construction IV. CommissioningV. Any other relevant subjects.

b) To commission machinery, if contractually required, in accordance with the commissioning committee’s approved commissioning programmes and procedures. The programmes are to identify and account for the interface requirements of other Contractors and the dates contained in the Contract Data.

2.3.3 Specific Risks

The following risks are identified by the Project Manager and Contractor specifically addresses these risks to ensure that the works is carried out safely:

a) Working at heights b) Dusty conditions c) High noise area d) Work is being carried out overhead by Others e) Work is being carried out below f) Work in confined spaces g) Possibility of noxious gasses h) Possibility of fires or explosions i) Rigging

2.3.4 Plant Safety Regulations

The Employer, on request from the Contractor, isolates required plant from all sources of danger as described in the Plant Safety Regulations.

The Contractor supplies his own personal protective equipment necessary to carry out the works.

The Contractor is also responsible for inspecting and maintaining such equipment as required in terms of the OHS Act and local procedures.

The Employer, on request, makes available a copy of the latest revision of the Plant Safety Regulations available to the Contractor.

The Contractor will comply with the Employer’s ‘Permit to Work’ system.

The Contractor conforms to all rules and regulations applicable to plant safety and completes the Workman's Register prior to working on the plant.

The Contractor declares any grinding and welding to be carried out on the workers register.



At every permit change the Contractor withdraws himself/herself/his staff for that period of permit suspension/revocation and thereafter only proceeds with the works after signing onto the new permit.

The Contractor ensures that he/she/all sub-Contractors/personnel/staff/his visitors are medically, physically and psychologically fit to enter the Kriel Power Station, and specifically any confined space.

The Contractor is prohibited from entering Radiation Areas.

The onus is on the Contractor to ensure that the correct confined space requirements and tests have been done or met by the Project Manager prior to entry into any confined space or hazardous plant areas.

The Contractor ensures that all personnel are competent to carry out the works. Proof of competency for technical and safety aspects must be available as and when required on site.

The Contractor shall comply with the health and safety requirements as per Eskom’s Rules and Regulations

4.4 ENVIRONMENTAL CONSTRAINTS AND MANAGEMENTIt should always be noted that Kriel Power Station is ISO14001 certified and therefore promotes Integrated Environmental Management (IEM) philosophy which aims to achieve a desirable balance between conservation and development. All activities taking place within Kriel Power Station must consider section 28 of the National Environmental Management Act (107 of 1998) which makes provision for the duty of care approach. The contractor’s team must commit to review and to continually improve environmental management, with the objective of improving overall environmental performance. The Contractor must consult with Kriel Environmental section on a regular basis for on-going assistance and advices.

Environmental requirements The Contractor ensures that all goods, services or works supplied in terms of the Contract conform to all applicable environmental legislation. Kriel Environmental Policy must be adhered to as a minimum.

Refuse disposal The Contractor is responsible to keep the work area clean of any rubble. All waste introduced and/or produced on the Employer’s premises by the Contractor for this contract, is handled in accordance with the minimum requirements for the Handling and Disposal of Hazardous Waste in terms of Government Legislation as proclaimed by the NATIONAL ENVIRONMENTAL MANAGEMENT: WASTE ACT, 2008

The removal of any hazardous waste is the responsibility of the Contractor.The Contractor shall comply with the environmental criteria and constraints as per the Eskom Rules and Regulations. The service provider shall comply to, but not limited to, all relevant legal and other requirements including the Kriel Power Station EMS, National Environmental Management Act (Act 107 of 1998) as amended and ISO 14001.



4.5 QUALITY ASSURANCE REQUIREMENTS

QUALITY MANAGEMENT

Quality Management System

The Contractor shall be required to demonstrate by means of a Contract Quality Plan (CQP) that this organisation is so structured that all the requirements of the specification will be properly monitored and controlled. The Contract Quality Plan (CQP), which must include the Quality Control Plan (QCP), is to be drafted in accordance with QM-58 and the Supplier Contract Quality Requirement Specification (QM58). The Quality documents are to be submitted for approval to the Quality Engineer within thirty (30) days after a contract has been awarded to the Contractor.

No work may commence unless the Contract Quality Plan and Quality Control Plan documents have been approved in writing and a copy submitted to the Quality Engineer/ Project Manager. The Contractor, in conjunction with the Quality Engineer must sign off all Quality Control documents after completing all work as per the agreed scope. The Contractor to submit a copy of the final signed off documents/data packages to the Project Manager within one (1) week after completion of work.

The Contractor shall be required to read and fully understand the contents of the Supplier Contract Quality Requirement Specification (QM58) and a copy is to be kept in possession or on premises.

The Supplier Contract Quality Requirement Specification (QM58) shall remain applicable in the event of the contract being extended or modified for reasons permitted.

By signature and acceptance of this contract the Contractor acknowledges and agrees to comply with and adhere to Eskom’s policies and procedures (current and/or latest revisions) including the Supplier Contract Quality Requirement Specification (QM58).

Contract Quality Management Plan Requirement

The Contractor prepares a contract quality management plan that, where appropriate, indicates the following:

Indicates the interface with the Contractors quality system and applicable documents such as procedures and work instructions

Establishes communication channels between the Contractor and the Quality Engineer / Project Manager in respect of quality and the integration of such with the prescribed contract communication channels

Indicates how specific subcontractors will be monitored Identifies items or activities for which quality control plans will be prepared Identifies the specifications, drawings and acceptance criteria for material for which

quality control plans are not required Identifies the areas or processes requiring special controls Identifies the Contractor’s Management Representative and personnel responsible for

the control of quality activities and their relationship to the Contractor’s management structure

Identifies the documents which are to be submitted to the Project Manager



Indicates the Contractor’s quality monitoring programme

The Contractor periodically updates the contract quality management plan to reflect changes in any of the above details. The frequency of such updates is determined by the Quality Engineer but will not be greater than one year.

Quality Control Plan

The Contractor’s or Subcontractor’s quality control plans cover inspection and test proposals for items or activities to be supplied as part of the works.

The quality control plan indicates the following as appropriate:

The identification of the item. A list of the sequence of operations including inspections and tests. The identification of the specification, drawings or procedures for each operation. The acceptance criteria with reference to the appropriate technical specification, in-

house, national or international standard and relevant clause number. The inspections and tests the Contractor has nominated for hold and witness points. Provision for inspections and tests nominated by the Quality Engineer. Provision for inspection status indication. Inspection and test records which are generated by the Contractor. Competence of the people-Level II welding inspector, Coded welders, minimum N3

Fitters/Boiler makers Personnel qualifications from approved training and accredited institute ITPs and welding procedures Material certificates Organogram indicating the quality person and his/her duties Adhere to the QM58 Follow the Eskom welding rule book

The quality control plans are reviewed by the Quality Engineer and Project Manager to allow for insertion of his specific requirements, including hold and witness points, prior to commencement of work. The Contractor does not commence work until the Project Manager accepts.

4.6 PROGRAMMING CONSTRAINTS GeneralThe Contractor submits a single programme that incorporates the programmes of all of his sub-contractors. The interface points between his different sub-contractors as well as the interface points between the individual sub-contractors and the Contractor are to be clearly identified. Project Key Milestones Dates (Stated in the contract data) as supplied by the Project Manager are to be incorporated into the programme.

Computerised Planning & ReportingThe latest version of MS Projects Package has been adopted by the Employer for all planning, progress updating and reporting on the Lime Plant Project. The Contractor must obtain this software and apply it for the planning and control of the works in accordance with the accepted plant Work Breakdown Structure.



Programme and Project LevelsThe Contractor will provide to the Employer a finalized proposed Level III Baseline for execution of the Project, within 2 weeks after the Contract Award Date as detailed in this Works Information, using PDF format and latest version MS Projects and PDF Format. This responsibility will include all Project Activities or efforts necessary to complete the Project, including the Contractor’s engineering, procurement, construction and his sub-contractor’s and supplier’s work.

The Contractor shall ensure that all responsible parties not within the Contractor’s control give the Contractor all the necessary cooperation in providing the necessary information needed concerning the details of the work to be scheduled, as well as providing reasonable support to assist the Contractor with the integration of all necessary work Activities or Employer Milestones into the Contractor’s Level III Schedule network.

Upon the Employer approving the method statements for the Project, the Level III Schedule will be used to monitor the planned progress of the Project by comparing it with the actual progress of the Project (as reflected in the scheduling updates to be provided by the Contractor and included in the Weekly and Bi Weekly Progress Reports to the Level III Schedule).

Additional Programme RequirementsA Level III programme is to be submitted with the Tender documentation, including Milestone dates.

The Contractor uses the Critical Path Method (CPM) technique for programming and planning. The preparation of the programme contains a programme basis document. This basis document describes the programme and planning methodology, format, project execution philosophy, resource assumptions, qualifications and any other items that may have a substantive impact on the schedule.

The programme is to be free of obvious errors related to sequence or timings of the works.The execution philosophy, programme and planning methodology, are to be described in the programme / schedule basis document for submission together with the tender documentation.

The programme layout takes into account the functional group breakdown (WBS) reflecting the manner in which the works are to be performed and how control data are summarised, reported and monitored.

The Project Calendar for installation/Execution will be discussed and the calendar must be clearly defined and accepted by the Project Manager in the Contract Document.

Activity ID Numbers must clearly define the level of the WBS and take into account the functional group.

The Level III Schedule will be composed of respective detailed Activities tied together logically. The detailed activity shall comprise of the following: Sufficient information such as activity duration and description so as to be able to

measure accurate progress within the required update period. A clearly defined starting point. A clearly defined completion point. A clear description of the activity to be performed. A single source of responsibility or ownership.



Submission of Revised Programmes and Progress Reporting

Once the programme has been accepted by the Project Manager, the Programme must be base-lined and a soft XER copy supplied with a hard copy to the Project Manager. This base-line will be used to monitor actual progress against the base line dates.

For any changes/revisions to the original programme, the Project Manager along with Site supervisor and Discipline Manager must sign. These must be accompanied with both hard copy and soft XER copy. Any deviations must be reported within the reporting period so as to ensure there are no delays to the project.Progress updates will be done by the Contractor and given to the Employer so that these can be used to update the Employer’s programme. This is done by supplying actual progress and remaining duration with the actual start and finish dates.

Monthly/Weekly Progress Status During the execution phase, the Contractor must report progress on a daily basis.The report can be in the form of a spreadsheet indicating the areas that are ahead, behind and on target. The Project Manager will, with the Contractor, determine any other report requirements.

4.7 CONTRACTOR’S MANAGEMENT, SUPERVISION AND KEY PEOPLE

The Contractor will provide skilled, qualified people for the successful execution of this project. The contractor will ensure that there will be 24/7 or as negotiated supervision of his/her employees.

4.8 INVOICING AND PAYMENTThe Contractor submits payment requests to the Employer. The Project Manager sends the payments certificate to the Contractor within 5 working days of receiving a payment request. The Contractor provides the Employer with a Valid Tax Invoice showing the amount due for payment equal to that stated in the Project Manager’s payment certificate within 3 working days. The Contractor sends back the signed payment certificate and copy of the invoice.

The Contractor shall address the tax invoice to:Eskom Holdings SOC LtdReg. No. 2002/015527/30Accounts PayableKriel Power StationPrivate Bag X5009Kriel 2271

The Contractor keeps records of all invoices submitted and paid up to the end of the project, as well as details of Actual Costs.

All invoices are hand delivered to the Kriel Finance Department (Account payables) and include on each invoice the following information:

-Name and address of the Contractor and the Service Manager; -The contract number and title;-Contractor’s VAT registration number;-The Employer’s VAT registration number 4740101508;-Description of service provided for each item invoiced based on the Price List;-Total amount invoiced excluding VAT, the VAT and the invoiced amount including VAT



Contractor is required to follow the correct process to ensure the payment is effected in accordance with contractual payment terms.

Contractor is required to follow the correct process to ensure payment is effected in accordance with contractual payment terms:

Service related invoicesa) Once the service have been delivered/completed both parties have to agree that the

service has been delivered/completed successfully prior to invoicingb) An assessment payment certificate must be completed between the Contractor and

Service Manager according to the service performed. Both parties have to sign the assessment/certificate

c) A copy of assessment/payment certificate must be obtained by the Contractor to enable the creation of an invoice and to prevent any discrepancies. A copy of the assessment/payment certificate must be attached to the original invoice

d) Service Manager performs a service entry and Goods Receipt on the SAP system. (Assessment/Payment Certificate issued as a source document for Service Entry Goods Receipt)

e) Service Manager will the forward the Service entry and Goods Receipt Note number to the Contractor within 3 working days after the service has been rendered and the Assessment/Payment certificate signed

f) Contractor must forward the original invoices together with a copy of the Assessment/Payment certificate to the Eskom Documentation Centre.

Goods Delivered Invoices a) Once the Goods are delivered, the Service Manager preforms a Goods Receipt on

the SAP system. (The delivery note is used as source document for Goods Receipt. The invoice should not be used as a delivery note)

b) Service Manager will then forward the Goods Receipt note to the Contractor immediately or within 3 working days after the Goods are delivered.

c) Contractors must then forward the Invoices together with a copy of the Assessment/Payment certificate to the Eskom Documentation Centre

Invoices linked to commodity pricesa) The requirements are the same as for Goods Delivered Invoices.b) Invoices which are linked to commodity prices will result in CPA (Contract Price

Adjustment).c) Attach a copy of the material invoice that has been previously paid to the CPA

invoice, as well as the calculation sheet and all indices attached other than SEIFSA.d) The relevant Eskom Department will then complete the CPA calculation sheet and

forwards it to the Eskom Documentation Centre.

Retention Invoices a) The requirements are the same as for Goods Delivered and Service related Invoices.b) Where Retention is applicable on the contract, the Eskom SAP system will

automatically create the Retention, and the amount deducted from the invoiced amount.

c) Invoices related to Retention releases require a defect or completion certificate from the Eskom End User and must be attached to the original invoice. The original invoice for the retention to be released must be accompanied by the approved and signed completion/defect certificate and forwarded by the Eskom End User to the Documentation Centre to effect payment.



Foreign exchange InvoicesNot Applicable

General Information related to Eskom Invoicesa) Contractor must ensure that the Service Entry and Goods Receipt Note number

appears on the invoice. (It can be printed or hand written on the invoice).b) Eskom Purchase Order number must appear on invoice.c) Invoices must be VAT compliant in line with the VAT Act requirements.d) Invoices submitted must reflect the bank account details. A once off copy of the

banking details may be forwarded to the Documentation Centre and it will be attached to each scanned invoice.

e) Invoices must be original or certified as an original in line with the VAT Act. No electronic invoices will be accepted.

f) Eskom’s correct name “Eskom Holdings SOC Ltd” must appear on the invoice.g) The Eskom VAT registration number: 4740 101 508 must appear on the invoice.h) No pro-forma invoices will be accepted.i) Contractor cannot be utilized by Eskom for more than 3 times without a contract being

established.

Note:1. Invoices must be delivered to the Eskom Documentation Centre, as this will speed up

the payment process and ensure that invoices are not lost and payments delayed. There is no need for Service Manager to sign invoices as they perform Goods Receipt in the system. The assessment certificate and Goods Receipt serves as the approval of payment.

2. Eskom Documentation Centre will review invoices according to a checklist and on completion scan the documentation into Accounts Payable processing system (Documentation can only be scanned where the Purchase order no. and Goods Receipt Note no. is reflected on the invoice, and the invoice complies with the VAT Act).

3. Invoices are processed and released for payment by Accounts Payable Section only where the source documentation is 100% correct.

4.9 INSURANCE PROVIDED BY THE EMPLOYERAs per Core Clause 87.1

4.10 CONTRACT CHANGE MANAGEMENT This section is intended to deal with any additional requirements to the compensation event clauses in section 6 of the core clauses; such as the use of standard forms. Not the same thing as documentation control.

4.11 PROVISION OF BONDS AND GUARANTEESThe Employer may withhold payment of amounts due to the Contractor until the bond or guarantee required in terms of this contract has been received and accepted by the person notified to the Contractor by the Project Manager to receive and accept such bond or guarantee. Such withholding of payment due to the Contractor does not affect the Employer’s right to termination stated in this contract.

4.12 Records of Defined Cost, payments & assessments of compensation events to be kept by the Contractor



The Contractor will keep record of all costs, payments & assessments of compensation events.

4.13 TRAINING WORKSHOPS AND TECHNOLOGY TRANSFERAfter completion of the contract, the Contractor is required to provide training and transfer system knowledge to the building owner/manager by submitting documented Design Intent, As-built drawings, Operational and Maintenance Manual, Commissioning Records, Commissioning Report and by providing training on all the systems to the building management staff to ensure that they have all the information and understanding needed to operate and maintain the features and systems in the building.

The Contractor is required to provide on-site training and training material to the Engineers, Operators and Maintenance personnel prior to taking-over of the works. The training will preferable be offered during the Trial Period for a minimum of ten (10) personnel. The contractor will, prior to handing over of the works, satisfy the Employer or authorized representative that maintenance and operational personnel are competent and adequately trained to maintain and operate the equipment supplied. The training is required to cover the following, however not limited to:

a) Information provided in the design intent report (including energy/environmental features)

b) Review of controls set up, programming, alarms and troubleshooting c) Review of O&M manuals d) Building operation (start up, normal operation, unoccupied operation, seasonal

changeover, shutdown) e) Measures that can be taken to optimise energy efficiency f) Occupational health and safety (OH&S) issues g) Maintenance requirements and sourcing replacements h) Obtaining and addressing occupant satisfaction feedbacki) Steps for Conducting On-site Training are required to include:

- Preparation - Introduction- Explanation - Demonstration - Practice Under Supervision - Conclusion

The operating and maintenance manual must be available during the training of site staff. Site staff must also be made familiar with the contents of that manual.

5 PROCUREMENT

The Eskom Standard Conditions of Tender 240-62055728 Rev 6 will be applicable to the Invitation to Tender on this project.

PEOPLEThe people who are executing the work onsite need to be reflected in the safety file. New people to be approved by the safety officer and safety file to be revised.

BBBEE And Preferencing SchemeCompliance to the Preferential Procurement Policy Framework Act (PPPFA)



SUB-CONTRACTINGPreferred subcontractorsRefer to procurement department.

Sub-contract documentation, and assessment of sub-contract tendersSub-contracting tender documentation will be as per the main contractor requirements, safety, quality and program needs to be verified by the Employer

Limitations on sub-contractingAppointment and managing the sub-contractor is the full responsibility of the Principal contractor

Attendance on sub-contractorsPrinciple contractor to ensure that sub-contractor(s) is included in all access processes and the management and supervisor during the execution of the works.

5.1 Plant and Materials 5.1.1 Quality

As specified in the technical specifications referred to in section 6 of this Works Information.

5.1.2 Plant & Materials provided “free issue” by the EmployerNo “free issue” plant or material will be provided

5.1.3 Contractor’s procurement of Plant and MaterialsAll plant and materials for this project will be included in the price

5.1.4 Spares and consumablesThe Contractor is required to provide a complete list of recommended spares. This list should include the prices of the item and its availability over the life of the plant. The prices quoted is required to include for packing, delivery to and off-loading at site, inspection and testing and adequate protection against corrosion, damage and weathering during transit and storage.

5.2 Tests and inspections before deliveryAs per the Works Information

5.3 Marking Plant and Materials outside the Working AreasAs per the Works Information

5.4 Contractor’s Equipment (including temporary works).The Contractor will ensure that all required equipment is provided for this project

6 CONSTRUCTION

6.1 Temporary works, Site services & construction constraints6.1.1 Employer’s Site entry and security control, permits, and Site regulations



All persons entering and leaving the Site will be subject to security checks including breathalyser testing for alcohol levels. Persons failing the latter test will be denied entry to Site.No person may enter the Site without the necessary permits.All persons entering the Site for the first time shall attend a safety induction course.Copies of Site regulations shall be obtained by the Contractor and these regulations shall be made available to, and imposed on, all persons employed by the Contractor and on visitors accompanying the Contractor on Site.

All persons shall obey road signs and no entry passed safety barricades shall be condoned. See also Section 2.4.6.

5.1.1.1 Hazardous LocationsA hazardous location in terms of SANS 10108, clause 3.15, or by performing a risk assessment of the plant, is an area where there might be a significant risk of igniting gas, dust or vapour. There are special requirements for apparatus used in such areas. The explosion protection rating of the apparatus determines whether it is suitable for application in the area depending on the Hazardous Location classification (SANS 10108). There are also specific authority approval requirements for the different explosion rated apparatus (SANS 10108). The power station approved hazardous location procedure shall be applicable for the lighting and small power installation (and other Plant). The lighting and small power installation shall conform to the authorised power station hazardous location classification document. When an area is classified (like the battery rooms) the luminaires used in that area should be approved by the required authority to be suitable for that area e.g. if an area is classified as Zone 2, only luminaires with an Explosion Rating of “Ex ia” shall be used (refer to Annex F in SANS 10108). IP 67 luminaires shall be used in areas where there is likely to be dust generation i.e. coal incline conveyors, coal bunkers and coal reclaim areas. The luminaire must comply with SANS 10108 and the applicable standard for the type of apparatus e.g. increased safety apparatus should comply with the relevant parts of SANS 60079.

5.1.1.2 Site Procedures And Regulations

Permit to work system a) The Contractor to have his site supervisor trained, tested and declared competent as responsible person, by the employer prior to commencement of the works b) NO work is required to be carried out without a “PERMIT TO WORK”. c) The Contractor’s Responsible Person must satisfy himself that all sources of possible danger are isolated. Details of the Permit to Work system can be found in the Plant Safety Regulations for Kriel Power Station, Eskom OPR 3305. d) Plant with a prohibitive sign attached may only be operated by the Employer’s personnel. Any employee of the Contractor found tampering with such plant will be permanently removed from the Site. e) The Contractor must provide a facility to lock valves, switchgear and other equipment in accordance with the Permit to Work system.



Safety induction course a) All the Contractor’s employees are required to attend a safety induction course before they will be allowed to work on the Site. It is the responsibility of the Contractor to ensure that all employees have attended the safety induction. The Contractor has to compile his/her safety file for approval at the safety officer. The safety officer must first approve this file, before the Contractor can attend the safety induction course. b) A list of employees requiring safety induction must be submitted at least 2 days in advance of arrival on site with the date and time of arrival so that safety induction can be arranged. Local safety procedures The Contractor adheres to all local procedures. A list of local procedures is available on request from the Project Manager.

Incidents/accidents a) Incidents and accidents must be reported and investigated as detailed in Safety, Health and Environmental Requirements for Contractors RSR0001. All incidents must also be reported to the Project Manager within 24 hours. b) First aid must be available either by the Contractor or use can be made of the Kriel medical centre at a fee. The availability of the Contractor’s own first aid does not relieve the Contractor of his obligation to report and investigate the incident in accordance with Kriel procedures.

Safety and Fire HazardsThe installation in its entirety is to comply with regard to electrical safety and supply interference suppression requirements, with SABS and/or and local authorities’ by-laws. All safety devices are to be tested by the Contractor under the simulated or actual fault conditions for which the safety devices are installed to prevent damage to system equipment and/or building. The Contractor confirms proper functioning of these safety devices in the form of signed inspection reports. Satisfactory test results from the National Building Research Institute or test reports from an approved testing laboratory are required, to certify the fire hazard ratings for proposed materials for insulation, covering and vapour sealing. Fire prevention and protection requirements to which Contractors must comply are detailed in Safety, Health and Environmental Requirements for Contractors RSR0001.

Inspection of equipment a) The Contractor’s equipment is inspected by an authorised employee of the Employer on arrival at the Site. b) The following documentation is required to accompany the equipment where applicable: copies of all test certificates and maintenance records. c) Lifting equipment and electrical equipment must be marked with a unique number, code or colour code for identification. If the equipment is found to be in an unsatisfactory condition or if insufficient maintenance has been carried out on the equipment, then it will not be accepted for use on site. d) A list of all lifting equipment and electrical equipment is submitted to the Project Manager at least 2 days prior to the occupation date. This list must indicate the unique number and description of the equipment. e) Training of operators must comply with the Works Information and statutory requirements. f) Each and every piece of workshop equipment and tools, the Contractor brings on site must be declared and logged at Protective services, the employer will not issue gate release permits to take Contractors workshop equipment/tools off site. Each and every piece of workshop equipment and tools, the Contractor brings on site must be declared



and logged at Protective services, the employer will not issue gate release permits to take Contractors workshop equipment/tools off site.

Documentation The Contractor is responsible for having the following documentation available on site in accordance with Safety, Health and Environmental Requirements for Contractors RSR0001. A copy of the OHS Act. a) Copies of all site accident report forms as required by the OHS Act. b) Copies of minutes of health and safety meetings held on site. c) Copies of inspection reports produced by the Accident Prevention Officer.

Restrictions to access on Site, roads, walkways and barricadesThe Contractor makes his own assessment of, and allows in his rates, for those access problems due to confined and restricted areas, existing structures and equipment, etc., which may be encountered and no extra payment or claim of any kind will be allowed on account of difficulties of access to the works or for the requirements of working adjacent to or in the same area as Others.

6.1.2 People restrictions on Site; hours of work, conduct and recordsPersons employed by the Contractor, and Contractor’s visitors, may not enter areas not related to the works without permission of the Employer. Workers register to be signed daily by all Contractor employees working at the Lime PlantsThe Contractor shall keep daily records of his employee’s working times. Records to be signed by the Employer. Records of employee’s conduct and any disciplinary hearings will be in accordance with the Employer’s and statutory procedures.

6.1.3 Environmental controls, fauna & flora, dealing with objects of historical interest None

6.1.4 Title to materials from demolition and excavationBefore the Contractor removes any items of Plant, Equipment or Materials from site, he must obtain permission from the Project Manager to effect such removal.

6.1.5 Cooperating with and obtaining acceptance of OthersAccess for and interface with other contractors

The Contractor is required to make his own assessment of the problems and difficulties which may be encountered and no extra payment or claim of any kind will be allowed on account of providing reasonable access to and interfacing with Others. Restrictions and hours of work may apply on some Sites. It is very important that the Contractor keeps records of his people on Site, including those of his Subcontractors which the Project Manager or Supervisor have access to at any time. These records may be needed when assessing compensation events.

6.1.6 Publicity and progress photographs No photographs may be taken on Site without the written permission of the Employer.



6.1.7 Contractor’s Equipment• The Contractor’s equipment is inspected by an authorised employee of the Employer on arrival at the Site.• The following documentation is required to accompany the equipment where applicable: copies of all test certificates and maintenance records.• Lifting equipment and electrical equipment must be marked with a unique number, code or colour code for identification. If the equipment is found to be in an unsatisfactory condition or if insufficient maintenance has been carried out on the equipment, then it will not be accepted for use on site.• A list of all lifting equipment and electrical equipment is submitted to the Project Manager at least 2 days prior to the occupation date. This list must indicate the unique number and description of the equipment.

• Training of operators must comply with the Works Information and statutory requirements.• Each and every piece of workshop equipment and tools, the Contractor brings on site must be declared and logged at Protective services, the employer will not issue gate release permits to take Contractors workshop equipment/tools off site. Each and every piece of workshop equipment and tools, the Contractor brings on site must be declared and logged at Protective services, the employer will not issue gate release permits to take Contractors workshop equipment/tools off site.

6.1.8 Equipment provided by the EmployerNo equipment for the works is provided by the Employer.

6.1.9 Site services and facilities5.1.10.1 CONSTRUCTION AND ERECTION ON SITE Under no circumstances is the Contractor or his employees allowed to connect up to any piped services or electrical supply without the permission of the Project Manager.

5.1.10.2 Supply of Electricity No guarantees of power supply are given and power supply breaks of some duration may occur without warning and it is required to not be grounds for additional time or compensation. The Contractor arranges at his own expense to maintain continuity and quality of power supply.

5.1.10.3 Water The Employer makes available free of charge, potable water required for the purpose of this Contract. The Employer does not guarantee continuity of supply and in such cases the Contractor is required to make his own provision for standby supplies to maintain continuity. The variation of pressure in the water supply or breakdown in the supply, is not considered to be valid for an extension of time or compensation. The Contractor provides, at his own cost, all connection fittings, pipe work, temporary plumbing, and pumps necessary to lead the water from the Employer’s points of supply to the various points where it is required.

5.1.10.4 Compressed Air The Employer attempts to make available compressed air (oil free and dry) to a pressure reaching lows of 620 kPa and highs of 640 kPa. No guarantees of air supply quality are given and air supply breaks of some duration may occur without warning. In the event of the Employer not being able to supply compressed air, the Contractor must supply his own air by means of a compressor.



5.1.10.5 Roads All traffic is limited to using existing roads. The Employer recovers any costs from the Contractor that is incurred from damage caused to underground services, structures, etc., as a result of the Contractor not using the prescribed routes.

5.1.10.6 First Aid CentreAmbulance and first aid facilities are available on site, during normal working hours. From Mondays to Thursdays, the working hours are from 07H00 to 16H15 and on Fridays the working hours are from 07H00 to 12H00. All cost incurred will be recovered from the Contractor to Eskom.

Telecommunications The Contractor arranges with the Employer for the use of telecommunication services.

Contractor shall provide everything else necessary for Providing the Works.

6.1.10 Facilities provided by the Contractor6.1.10.1 Electrical equipment/appliances, lighting and power Any electrical equipment or appliances used by the Contractor must comply with all relevant safety regulations and requirements as detailed in Procedure 15 MEPR-E/SAF-025 and be maintained in safe and proper working condition. The Supervisor has the right to stop the Contractor’s use of any electrical equipment or appliance which, in the Supervisor’s opinion, does not conform to the foregoing. The Contractor provides at his own expense any temporary local lighting, and ensures that it is in accordance with the requirements of the Factories Inspector. The Contractor provides, at his own expense, all temporary wiring and cabling to lead power from the point of supply to the various points where it is required, maintain same and remove on completion.

6.1.10.2 Security The Contractor is responsible for all security on site, viz., fencing of, night watch and access control in order to secure all plant, materials and the works itself. All these measures must be in accordance with any relevant regulations and standards and are subject to the Supervisor’s acceptance. It is also the Contractor’s responsibility to ensure the security of all completed portions of the works prior to Completion.

6.1.10.3 Accommodation of employees The Contractor is responsible for the provision of accommodation or meals of his own personnel, and the cost thereof to be included in his Price.

6.1.10.4 Sanitary facilities The Contractor provides services, maintains and removes on Completion any facilities required and allow for same in his Price.

6.1.10.5 Housekeeping The Contractors equipment does not impair the operation of the surrounding plant or access to the surrounding plant.



6.1.10.6 Plant and materials The Contractor is to recommend the keeping of any additional stocks of spare parts based on experience gained by him during the execution of the works. The Employer reserves the right to inspect and carry out any checks of its own that he considers necessary.

6.1.11 Existing premises, inspection of adjoining properties and checking work of OthersAs per scope work

6.1.12 Survey control and setting out of the worksAs per scope of work

6.1.13 Excavations and associated water controlAs per scope of work

6.1.14 Underground services, other existing services, cable and pipe trenches and coversAs per scope of work

6.1.15 Control of noise, dust, water and waste Waste is removed promptly to the designated deposit areas. No stockpiling will be permitted.• Domestic waste to white waste bins.• Production waste to the marked bins, e.g. “Coal and Ash Only”.• Paper and cans to their respective recycling bins.• Contact Civil Engineering for the disposal of building rubble. Building rubble is to be removed and disposed of only in the designated area by the Contractor, as indicated by the Project Manager.• Scrap metal (Scrap Metal bins), Wood & Rubber, Redundant Valves, Pipes, Equipment, etc., to be placed in the marked bins near the potable water head tank.• Solvents and cloths used to the Cleaning Bay.

6.1.16 Sequences of construction or installationThe Contractor will provide the sequence of construction or installation

6.1.17 Giving notice of work to be covered upThe Contractor will provide written notice Refer 13.3 in the contract: The period for reply to the Project Manager of work to be covered up. Refer to point 5.1.9: No equipment for the works is provided by the Employer.

6.1.18 Hook ups to existing worksThe Contractor will provide written notice Refer 13.3 in the contract: The period for reply to the Project Manager to hook up to existing works.



6.2 Completion, testing, commissioning and correction of Defects6.2.1 Work to be done by the Completion Date

On or before the Completion Date the Contractor shall have done everything required to Provide the Works

6.2.2 Use of the works before Completion has been certifiedThe Employer shall only take-over the works after completion

6.2.3 Materials facilities and samples for tests and inspections As per the scope of wor

5.2.3.1 INSPECTION AND TESTING OF THE WORKS ON SITE

5.2.3.1.1 GENERAL After the completion of the installations and when all pressure testing has been completed, the Contractor set the plant to work and regulate valves to demonstrate that the installations are functioning correctly and efficiently to the complete satisfaction of the Employer. Items of a specialist nature e.g. automatic control are commissioned by the manufacturer or their representative, who instruct the Employer on the function and proper operation of the equipment. All test instruments required during commissioning are provided by the Contractor together with any other equipment they may require.

5.2.3.1.2 INSPECTION PRIOR TO TESTING AND COMMISSIONING Prior to tests taking place on the completed or a section of the installation the Contractor check the following points: a) That the components comprising the installation or sections of an installation are installed as described in the specification and drawings. b) That the components have been installed correctly. c) That the manufacturer‘s test data for plant and components, if necessary for testing and commissioning, has been provided and is available for reference.

5.2.3.1.3 CLEANING AND FLUSHING OF PIPE WORK SYSTEMS All pipe work systems included in this contract are thoroughly cleaned internally to remove any foreign matter. The following operations are required to be carried out: a) The cleaning of completed pipe work to remove dirt etc. accumulated in pipe work during installation by flushing out the installation. b) The external cleaning of all pipe work and ductwork carried out to remove surplus jointing material, paper labels, dirt and grease.

5.2.3.1.4 TESTING The site testing of the various installations take place prior to commissioning. The system is to be pressure tested to a test pressure of 1.5 X Maximum Design Pressure. All leakage tests are witnessed by the Employer and are independent of any performance tests on the whole system, which is as detailed elsewhere in this specification. Installations or sections thereof, which is embedded in the structure or concealed in permanently sealed ducts or voids, etc., is, in addition to the above specified tests, individually tested as they are laid and before being concealed. Tests on site



Tests are carried out to ensure the correct function of the equipment, safety of works and personnel, and to determine compliance with specifications before being taken over. The Contractor supplies a schedule and program of all the tests that are to be carried out and indicates the details of tests he proposes to perform and the manner in which the results of tests will be documented. The Contractor must provide current calibration certificates for all test equipment used when required to do so by the Project Manager. For Non Destructive Testing (NDT), the following as a minimum is required to apply: a) 100% Visual Inspection of welds b) 50% Dye penetrants Test certificates

6.2.4 CommissioningThe Price is required to include all allowances for testing and commissioning whereby all sections of the Works are made ready for full duty operation. Commissioning is required to include as a minimum: a) The services of skilled Engineers to supervise the testing and commissioning and making ready for the full duty operation of the complete Works. b) All management, supervision, labour, tools, instruments, chemicals, test apparatus, calibration equipment and any other equipment and facilities as may be necessary. The Contractor’s preliminary trials and commissioning of the plants is required to be carried out by the Contractor’s representatives, who is required to remain in attendance until such time as the plants are working to the Employer’s satisfaction. A requirement of commissioning is to prove that all activities as laid down in the operating manuals are correct and are carried out in the correct sequence and to determine that all the plants have been provided as required in the scope of work. The operating manuals should be submitted at least 2 weeks prior to the start of commissioning for acceptance by the relevant Eskom engineer. The Contractor is required to (including all procurement of materials and services required); a. The tanks, pumps and water meters is required to be identified in such a way as to be easily visible, permanent and non-removable before the completion and commissioning of the works. b. All pipes is required to be colour coded in accordance with SANS 10140-3 by the Contractor c. Completion of the total works is required to be when pre-commissioning, all instruction manuals, training of maintenance staff and all of the above described works are completed by the Contractor. d. All commissioning of plumbing works is required to be in compliance with SANS 10252 parts 1 and 2 by the Contractor and conducted in the presents of the Employer’s supervisor. e. “As built” drawings is required to be provided by the Contractor in both hard copy (three sets) and electronically within 30 days of completion of the works. The commissioning procedure to be adopted is prepared by the Commissioning Authority. During commissioning the Contractor set the installation to work and competent personnel demonstrates and explain the operation and maintenance procedures for the installation and for each item of plant to the Employer. During commissioning if any item is found to be unsatisfactory the fault is rectified and/or new components fitted and commissioned by the Contractor at their own expense. The Contractor then rebalances and commission the system or part thereof affected at their own expense. f. All Pump sets start-ups and shut downs providing details of flow rates and pressure drops along with operation time. This is to be recorded over an operational day working span. g. Flush the new tanks and clean as per SANS 10252 part 1. The water purity must be tested by an independent laboratory and the results documented. h. This is required to be tested once a month from date of completion up until one year after. i. Completion of works by the Contractor in each Section is required to be when pre-commissioning (SANS 10252 parts 1 and 2) is complete and all pipe work is at working pressure, cisterns full, batteries installed, limestone stone installed, pumps electrically connected and all Equipment and materials are in a clean state to the satisfaction of the supervisor where applicable.



j. Work to be completed in each section by the Contractor; k. The Contractor is required to commission and provide documentation for: l. All Defects found is required to be completed within five working days subject to availability of materials by the Contractor. If a lead in time is required this is required to be requested by the Contractor in writing with written proof from the supplier.

After successful completion of the commissioning and proof period of the installation and any maintenance materials as listed in the Specification and those normally supplied by equipment manufacturer are handed over, the defects liability period commences. Items of equipment which are of a specialist nature e g automatic controls etc. are commissioned by the manufacturer’s representative who instruct the Employer on the function and proper operation of the equipment. The contract is deemed to be complete when the following have been completed in accordance with the relevant specifications: a) The Plant is erected, and commissioned b) Signed erection and safety clearance certificates. c) The final drawings have been submitted d) All documentation has been submitted including testing reports and the associated certificates received. All Quality Control Plan (QCP) documentation received. Final Draft of the Technical, Operating, Maintenance manuals delivered e) The Plant and all documentation / drawings are coded and labelled. f) All special tools have been supplied

The Contractor submits a commissioning schedule and program for acceptance by the Project Manager by the Contract Date. Before Plant and Equipment is placed in service the Contractor certifies that it is in a suitable and safe condition Prior to the time when commissioning is to commence, the Project Manager will appoint a representative who will co-ordinate the commissioning of all Plant and Equipment forming an integral part of the system being commissioned. The Contractor is responsible for the commissioning of all the Plant and Equipment he is to supply to the requirements of this specification in conjunction with the Project Manager and the Employer’s representatives. Where various components are already in place, or are supplied by the Employer to form an integrated system, the Contractor at the time of commissioning, carries the responsibility for the correct functioning of the whole system. In the event of incorrect functioning, the Contractor determines the cause and he corrects the Defect if the Defect is within Plant and Equipment of his own supply, or notifies the Project Manager who will instruct his representatives to rectify Defects within their equipment. The Contractor, at the time of commissioning, has the agreement, or alternatively, the attendance of the Project Manager involved in a particular phase, before proceeding with commissioning. Consequently, the Contractor must assure himself as to the safety of his own Plant and Equipment in respect of any particular commissioning test and in the event of damage accept responsibility for such Plant and Equipment. The Contractor co-operates to the fullest extent with the Project Manager and the Employer’s representatives in the commissioning of the whole of the works for which he supplies the portion of Plant and Equipment specified in this Works Information. The Contractor assists the Employer’s representatives in the optimisation of all controls and notifies the Project Manager when the controls have been completed to the Contractor’s satisfaction before offering the works for take over.

6.2.5 Start-up procedures required to put the works into operationThe Contractor has to comply with the Employer’s safety to which Contractors are to conform at Kriel Power Station. The safety clearance certificate is the certificate issued by the Supervisor to the Contractor, stating that from the time and date stated on the certificate the specified system is



under the Project Manager’s control. Further access to the system is only permissible through the Employer’s permit system.

In order to put the works into operation the Employer may require the Contractor to either do this for him or be in attendance whilst he does it, depending on who is the responsible person. State requirements of the Contractor here together with any special arrangements associated with operating plant and machinery.

6.2.6 Take over proceduresTake-over is after or at the same time as Completion. The Employer may require the Contractor to provide assistance, security personnel on a temporary basis etc.

6.2.7 Access given by the Employer for correction of DefectsAccess To Plant, Material And SystemsThe Contractor is to familiarise himself with the proposed location of plant & material and is responsible for ensuring that sufficient access is available on site to allow the largest component parts to be brought into position. The required unobstructed space is to be left around the equipment for access, maintenance and service of the equipment in accordance with the manufacturer's instructions. Install plant and materials so as to be readily accessible for testing, operation, maintenance and repair. Minor deviations from drawings may be made to accomplish this, but changes of magnitude or which involve extra costs require approval of the Employer. Platforms and ladders are to be provided for access to instruments and equipment requiring maintenance.

5.2.7.1 Hosting And Rigging The Contractor is responsible for hoisting and rigging of all equipment into position. The plant & material supplier is required to be present to verify correct procedure.

5.2.7.2 Protection Against Damage The Contractor is required to take special care in transport, delivery, storage on site and installation to ensure that the entire system is in 'as new' condition at start-up. The contractor is required to ensure packaging material are of sufficient strength and/or temporarily reinforced during transport to and handling on site, until installed in its final position, to ensure that the equipment “packed” retains its structural and dimensional integrity during these phases of the contract. The Contractor remains responsible for equipment in 'as new condition' and is not allowed to install equipment in areas or spaces where it can be subjected to damage through weather or trades for which it has not been designed. The Contractor is only allowed to install equipment intended for internal use if the following pre-installation requirements are met: a) Areas are sealed and protected from outside weather (facade and roof closed and finished). b) The areas are clean, isolated and secure (no other trades' material and labourers cross-traffic) and protected against possible damage and pilferage.

6.2.8 Completion Of WorksCompletion occurs when the following is provided by the Contractor, in accordance with the Works Information: a) Detailed Design Documentation b) Procurement c) Manufacture d) Erection including supports, C&I, electrical, etc.



e) Manufacturer’s works and site testing f) Test certificates g) Painting h) Corrosion protection and quality testing i) Commissioning and optimisation of the plant j) Successful Acceptance Tests k) Operating and maintenance manuals l) Employer staff training and training manuals i) "AS BUILT" drawings

6.2.9 Performance tests after CompletionThe complete system is to be subjected to Performance Tests under full working conditions. Performance tests shall be carried out to prove all the plant guarantee figures provided by the Contractor in the technical schedules. The Contractor is required to supply the necessary field testing instruments (thermometers, pH meters, and flow meters) and detailed description of field testing arrangement to prove a capacity/performance measurement accuracy of ± 5% for performance acceptance testing. Acceptance tests to determine the efficiency, performance and other guarantees specified will be carried out at any time during the commissioning period by mutual agreement between the Employer and the Contractor. The Acceptance test will consist of 3 tests per North and South Side of the plant for a period of 72 hours per test. Acceptance tests are required to be carried out to prove all the plant guarantee figures provided by the Contractor in the technical schedules.

The Contractor is required to include: 1. The services of a skilled testing Engineer fully experienced in the type of plants installed to assist the Employer in the carrying-out of the acceptance tests throughout their duration. 2. The provision of suitable testing equipment designed to impose on the plants simulated varying operating conditions. The design and use of such testing equipment is required to be to the approval of the Employer. On conclusion of the acceptance tests to the detailed programme provided by the Contractor, the Employer will analyse the test results obtained and within one month from the completion of the acceptance tests, will advise the Contractor in writing of whether the plant conforms to the guarantees given by the Contractor in the schedules of this specification and in consequence can be accepted.

The Contractor provides a test certificate for each test as mentioned above. The Project Manager accepts the format of this certificate. The Contractor indicates the details of tests he proposes to perform and the manner in which the results of tests will be documented. Specimen tests used by the Contractor are also submitted.

6.2.10 Training and technology transferAfter completion of the contract, the Contractor is required to provide training and transfer system knowledge to the building owner/manager by submitting documented Design Intent, As-built drawings, Operational and Maintenance Manual, Commissioning Records, Commissioning Report and by providing training on all the systems to the building management staff to ensure that they have all the information and understanding needed to operate and maintain the features and systems in the building. The Contractor is required to provide on-site training and training material to the Engineers, Operators and Maintenance personnel prior to taking-over of the works. The training will preferable be offered during the Trial Period for a minimum of ten (10) personnel. The contractor will, prior to handing over of the works, satisfy the Employer or authorized representative that maintenance and



operational personnel are competent and adequately trained to maintain and operate the equipment supplied.

The training is required to cover the following, however not limited to:

a) Information provided in the design intent report (including energy/environmental features) b) Review of controls set up, programming, alarms and troubleshooting c) Review of O&M manuals d) Building operation (start up, normal operation, unoccupied operation, seasonal changeover, shutdown) e) Measures that can be taken to optimise energy efficiency f) Occupational health and safety (OH&S) issues g) Maintenance requirements and sourcing replacements h) Obtaining and addressing occupant satisfaction feedback

Steps for Conducting On-site Training are required to include: a) Preparation b) Introduction c) Explanation d) Demonstration e) Practice Under Supervision f) Conclusion

The operating and maintenance manual must be available during the training of site staff. Site staff must also be made familiar with the contents of that manual.

6.2.11 Maintenance Requirements During Defects Liability Period The contractor is required to be responsible for any failures as a result of the installation during this period. A maximum response time of 8 hours will be allowed for all failures from the time the notification had been delivered to the contractor. The planned maintenance is required to be execution in 3-monthly maintenance service, except if the suppliers recommend a different service interval, the latter is required to take preference. The contractor will provide a PM schedule that will include the following: a) Inspections time periods of applicable wet services equipment/items including manufacturer’s inspection requirements. b) All wet services equipment/items that require cleaning, removal of contaminants and waste, correct adjustment and setting, tightening, testing, fixing, refill, lubrication, rust prevention, touch up, servicing, inspection, replacement, re-installation, troubleshooting and calibration during a specific period e.g. weekly, monthly, 3 or 6 monthly, yearly or when required. This is required to include the manufacturer’s maintenance requirements. c) The schedule will be associated with PM guides/instruction list indicating the function to be executed and the material to be used for each piece of wet services equipment that will be used by the contractor during the one year maintenance period. Each guide/instruction list will include the General instructions, Special instructions, Tools and materials to be used, List of codes/standards that are applicable to the equipment being maintained and Maintenance check points & maintenance execution including manufacturers maintenance requirements. d) The contractor will indicate all materials to be used for each instruction e.g. “Replace “ball valve” – Material required = Three (3) 25NB ball valves

A process used to determine maintenance requirements of any physical asset in its operating context is to make use of the “Reliable Centre Maintenance” (RCM) process (RCM by John Moubray – distributed by Butterworth-Heinemann) or similar. The RCM process entails asking seven questions about the asset or system under review, as follows:



a) What are the functions and associated performance standards of the asset in its present operating context? b) In what ways does it fail to fulfil its functions? c) What causes each functional failure? d) What happens when each failure occurs? e) In what way does each failure matter? f) What can be done to predict or prevent each failure? g) What should be done if suitable proactive task cannot be found? To apply the above questions a table should be drawn up of each component/item function, function failure, failure cause, failure consequences and proactive tasks. The contractor will provide detail tables of all items which will be discussed and agreed with the Employer before any maintenance tasks e.g. inspection period (e.g. daily inspections) or preventative maintenance tasks is taken up in the maintenance schedule (drawn up by the contractor) that will be executed by the contractor during the one year maintenance period.

Maintenance information requirements The contractor will provide maintenance information on each PM and CM executed during the one year maintenance period. The report template to be used for providing the required reporting will be agreed upon between the Employer and Contractor before execution of the maintenance & servicing commences. All PM’s is required to be executed by means of Employer request number which is required to form part of the procedure. Although maintenance is executed on a unit/system more detail is required of that unit/system and specific detail is required of the components/items of that unit/system as follows: Time reported or request/order generated Time in - Time contractor arrived on site Time out - Time contractor finished breakdown/complain Total time spend on breakdown maintenance Components/item description maintained Was component/maintenance item: Repaired Replaced Inspected Remarks on repair, replace or inspection and quantity/number of materials used Power measured Pressure measured Flow Measured Cost of maintenance or servicing

6.2.11.1 Maintenance Management From information received on the PM`s and CM`s reports, logbook (produced by the contractor) and Employer service requests, maintenance management will be executed by the contractor in conjunction with the Employer. A maintenance meeting will be held once a month during the maintenance period where the contractor, Employer will discuss all areas of the maintenance execution process, problems, maintenance information, and non-compliances and introduce maintenance management processes to be implemented by the contractor during the maintenance period. The following are some of the areas of maintenance on which maintenance management will be executed:



Improve maintenance cost-effectiveness The capability to improve maintenance cost-effectiveness will be developed by all parties at the monthly maintenance meeting, based on the data received from the maintenance contractor and employers requests. The following minimum capability will be developed: Failure Report Analysis (FRA). FRA will be done for each specific piece of equipment and the following analysis will be carried out: Time between failures (TBF), draw a process control chart of the TBF showing the MTBF, each TBF as recorded in sequential order and TBF control limits. Monthly preventative and corrective maintenance times/cost. Draw a process control chart of the monthly time/cost showing average monthly time/cost spend on PM`s and CM`s. Draw a process control chart of the downtime showing the average downtime; each downtime as recorded in sequential order and downtime control limits. Draw a process control chart of the average availability, availability as calculated in sequential order and availability control limits. Identify those entire specific pieces of equipment of which the most recent TBF, monthly cost, downtime or availability is outside the control limits of the specific of generic equipment type or downtime is not within specified/contracted levels.

List the following for each of the above identified pieces of equipment for the most recent failure, as well as all previous failures: All of the failure descriptions All of the failure causes

Corrective action (CA). From the FRA, the activity report obtained from the maintenance contractor, as well as standardisation considerations, one of the following actions will be taken for each of those equipment identified in the previous section a).: Don’t do any corrective action, and monitor the performance of the specific piece of equipment. Replace the specific piece of equipment or phase the equipment out. Update the “maintain to” info data pack (improve preventative maintenance such as more frequent lubrication etc., or specifies a more realistic downtime values). Do maintenance concept trade-off studies and update the maintenance concept (i.e. improve the lines of repair, maintenance processes, inventory levels/contents (e.g. filters), etc.). Carry out an equipment design/application analysis and/or a LCC analysis to determine whether it is cost-effective to change the equipment configuration (i.e. a different model/producer in need of more/less reliability, performance, capacity, etc.). Replace identified equipment as soon as possible This task comprises that specific part of maintenance improvement whereby it is determined as soon as possible that the existing equipment should be replaced by other or new identical piece of equipment, mainly due to a result of an analysis showing that the existing equipment requires excessive maintenance and excessive costs. The disciplined replacement needs to be managed together with its configuration control regarding series number and warranty control. The equipment database needs to be updated and controlled. Maintenance guide for three monthly service or as required "Maintenance" or “CHECK” in the guide is required to mean the efficient and effective examination, inspection, service, repair and replacement of components and parts of an air conditioning unit or system so that the air conditioning unit or system complies to the manufacturers, design and commissioning operational specifications and statutory/company requirements . This includes the cleaning, removal of contaminants and waste, correct adjustment and setting, tightening, testing, fixing, refill, lubrication, balancing, rust prevention, touch up and refrigeration charge of the air conditioning unit or system.



The guide indicates maintenance check points, components and items that are all applicable to the wet services package. When maintenance is executed in accordance to the guide the maintenance check points, components and items not applicable is required to be excluded from the service to be executed. The exclusion of any maintenance check points, components and items is required to be the responsibility of the contractor. Any error exclusions is required to be the responsibility of the contractor and no considerations is required to be given to claims made by the contractor for the rectification thereof. The following schedule in the table below is required to be used for execution of maintenance and commissioning tests. Table: Guide for execution of maintenance and commissioning tests Check Points

Action

All motors Bearings, current drawn, speed, coupling, guards, shaft, protection, housing, mountings, belts, pulleys, gaskets, seals, nuts and bolts

All pumps Volume flow, bearings, seals, shaft, pulley, belts, protection, mounting, housing, blades, dampers, current drawn, bolt and nuts

Electrical Compliance with regulations, electrical supply, conduit, joints, thermal blocks, wiring, cables, insulation, trunking, switchgear and protection

Controls Wiring, sensors, set points, indicators, alarms and signalling

Drainage Piping, leaks, connections, fittings, joints, water flow, trap and clamps

Pipework Leaks, hangers, supports and clampsTanks Leaks, gaskets, flangesAlarms Casing, controls, wiring, indicators,

communication and faceplatesOther actions however not limited to Fill in and complete maintenance report

6.2.12 Planned Maintenance after CompletionAfter successful completion of the commissioning and proof period of the installation and any maintenance materials as listed in the Specification and those normally supplied by equipment manufacturer are handed over, the defects liability period commences. The contractor is required to execute maintenance and maintenance management under the supervision of Employer for a period of 24 (twenty four) months from the date of Taking over of the Works.

The Contractor must return to Site following the issuing of the Taking over Certificate whenever is required or as defined by the detailed maintenance schedule submitted on Operating & Maintenance manuals. The minimum intervals for the contractor to be onsite for inspection after taking-over of works is required to be 3, 6, 9, 12, 15, 18, 21, and 24 months respectively.

A report after each visit is required to be submitted to the Employer in writing. The Contractor is required to rectify such items in accordance with the requirements of the conditions of Contract. The contractor is responsible for any defects and faults that may arise during the guarantee and maintenance period and will be called out to repair such defects or faults as required; therefore it is important that a responsible/contact person and alternatives is required to be provided as part of the Operating & Maintenance manual submissions.

The contractor is required to make all adjustments necessary for the correct operation of the plant and equipment for a period of 12 (twelve) months after the date of issue of taking-over certificate. The Contractor is required to make good any defects due to inferior material or workmanship that



may arise during this period. If during this period, the plant is not in working order for any reason for which the contractor can be held responsible or if the plant develops defects, the contractor will be notified and immediate steps is required to be taken by him to remedy the defects or to make any adjustments required. Should such defects occur so frequent as to become objectionable or should the equipment otherwise prove unsatisfactory during the above-mentioned period, the contractor, if called upon by the engineer, is required to replace at his own expense the whole or such parts thereof as the engineer may deem necessary, with apparatus to be specified by the engineer. Final acceptance will only be taken once all the equipment has been replaced and the plant is in working order again. The contractor is to confirm by means of instrumentation that the plant is delivering the same duty that it was at first acceptance. These readings and measurements are to be witnessed by the Employer.

6.2.13 Principles Of Effective Maintenance And Maintenance Management The following principles will prevail to ensure effective maintenance management and maintenance of the wet services facilities/equipment, namely: a) The principle of disciplined configuration management/control is required to be complied with during this period. The maintenance execution should apply strict control/discipline not to change/alter the configuration status of the equipment without either approval by or notification of the change. The importance of managing the “as-built”, “operate-to” and the “maintain-to” information data packs (operation and maintenance manuals including maintenance schedules for each piece of equipment) of the equipment. Any discrepancies between the actual configuration and the information data pack information could lead to cost-inefficient maintenance (wrong information on equipment leads to wrong maintenance execution and therefore the operation and maintenance manual will be 100% correct. b) The principle of applying optimum maintenance management and the desire to continuous improvement, learning from lessons of the past and wanting to apply intelligent maintenance management principles, should be accommodated as the driving force for maintenance management. The contractor will therefore start with the built of each wet services systems history for future continuous improvement. c) The sound principle of the maintenance contractor having an independent quality assurance (QA), quality control (QC) and even an inspectorate service of the maintenance execution, where the Employer should only execute quality assurance (check a % of the QA and QC of the contractor). It is therefore the responsibility of the contractor to provide the employers representative with maintenance QC lists and QA methods that will be used during the one year maintenance period. d) Management information is of the utmost importance, especially in areas where huge sums of money are spent or where decisions are highly dependent on accurate information. Good performance measurement and management is highly dependent on accurate information (Maintenance report back information). The Employer will determine with the contractor before works completion, the maintenance information requirements and format that will be provided by the contractor during the maintenance period. e) Given the complexity/diversity of the equipment, it becomes obviously important to name and number the different system equipment to determine the exact maintenance history of each piece of equipment during the maintenance year and thereafter. The contractor will therefore number each unit of each system in accordance the numbers that will be provided by the Employer before the works commences. f) Statutory regulations and eskom standards should be adhered to in the maintenance execution period in conjunction with the normal preventative and corrective maintenance actions. Where facilities/equipment is found that do not comply is required to be rectified to create a working environment that is safe and without risk to safety and health. The SANS 10147 is an OHS Act Regulation and should always be complied with during the maintenance period.



g) Although the initial focus of maintenance management should be on optimising/reducing the maintenance-cost, the focus should shift to incorporate optimising/reducing of the entire operating cost and ultimately optimising/reducing the life cycle cost (LCC). Other energy saving methods will be provided by the Employer to the contractor to be included in contractors PM schedule. Power consumption readings of each system provided with meters will be part of the contractor’s monthly Planned Maintenance (PM) schedule. h) Trade-off studies should continuously be analysed or conducted to ensure optimal use of preventative maintenance and corrective maintenance for each respective/individual situation (e.g. - more preventative, less corrective to increase item MTTF/MTTR). i) Trade-offs regarding repair or replace decisions should continuously be made, as well as decisions on whether equipment/systems should be phased out due to too high operating cost. Trade-offs involving decisions to purchase more reliable equipment with lower maintenance cost versus less reliable (also less costly) equipment with higher maintenance-cost will be executed. j) A strategy will be developed by the Contractor regarding different standard levels of repair during the maintenance period in order to ensure focus/cost-effectively of the contractor’s service (supplier cost versus contractor cost).

k) Re-commissioning of equipment after system breakdowns will be implemented as part of the contractor’s Corrective Maintenance (CM) procedure. l) The contractor will provide a maintenance service to the level defined in a quality plan (service level agreement standard). All the activities performed will comply with the required standard. The contractor will supply procedures, documentation, and testing methods to support the committed level of service. The contractor will have a documented process that verifies that all employer requirements (maintenance specification requirements and standards) are met. The PM and CM response times as required by Employer will be applied by the contractor during the year maintenance period. Refer to Employer maintenance response times in accordance with the Service Level Agreement (SLA) between Contractor and Employer.

6.2.14 Service Level Agreement The Employer expects the wet services maintenance contractor to at least meet the following service requirements however not limited to: a) Ensure a continuous supply of potable water all the facilities requiring potable water. b) Restore any interruption to potable water supply within the agreed restoration times. c) Maintain an accurate database of all assets maintained.

7 PLANT AND MATERIALS STANDARDS AND WORKMANSHIP

7.1 Investigation, survey and Site clearance6.3.2.2 Geotechnical Investigations The Contractor will perform a geotechnical investigation for input into the civil engineering designs for the north and south side of the Kriel Power Station. The geotechnical investigation will provide all necessary geotechnical parameters required for the design of infrastructure as stated below.

7.2 Building worksReference could be made to the latest Model Trade Preambles published by the Association of South African Quantity Surveyors. However these have been developed for use with the JBCC series of contracts and an approach where description of the work is made part of the bill of quantities, which is not the case in other forms of contract. Only parts of the Model Trade Preambles could be referenced by an ECC contract, with a covering note dealing with the changes in terminology. Further changes are required depending on which parts are to be selected.



This subsection would typically comprise a) Particular specifications provided by the Employer b) List of standardised specifications applicable to the works andc) Variations to the standardised specifications

7.3 CONTRACTOR’S RETURNABLE SCHEDULESThe Contractor must complete the Contractor’s returnable schedules (proposed specifications and schedules for items of Plant and Materials and workmanship). The Contractor ensures that all information in the Contractor’s returnable schedules complies with the Employer’s specifications and the Contract.

7.3.1 General This section of the document provides the specific technical requirement (returnable) from the Contractor relating to the installation. The Contractor completes this document with the clear understating and information presented in technical specification document. The Contractor is free to deliver information in a free form outside the given tables, wherever this seems to be suitable. However, he sticks to the topics and the numbering of the schedules and completely provides the requested information together with the respective schedule. The column “Tendered” is to be filled in by the Contractor for all items. The given information and specification is required to be part of the agreement and binding for all delivery and services. The technical data sheets is required to be supplemented by additional descriptions, explanations, drawings and all other information necessary for a clear understanding of its application to enable the Employer to undertake the necessary assessment, evaluation and verification of the technical and performance features of the Bid. The Contractor ensures that wherever the information is required in respect to multiple units, the Tenderer provides the required information on a unit by unit basis. The Contractor provides all figures to no more than two decimal places, unless required in specific sections.

7.3.2 Equipment Warranty The Contractor provides equipment warranty according to minimum requirement set in table below. In addition (and without prejudice) to the defects liability the Contractor releases warranty on equipment (including not limited to strategic part warranty. No equipment warranty is required to limit another warranty or otherwise. The Contractor transfers the ownership of all manufacturer equipment warranties to the Employer during the Substantial Completion of the Project.

Table: Equipment Warranty EquipmentMinimum Warranty Period in Years

Tendered Warranty Period in Years

1. Water Supply Equipment and its components 1

2. Lime Silo X 2 1

7.3.3 Technical Data Sheets The Contractor provides the plant components with minimum technical specification required by the Employer, presented in this section. If the Contractor considers any additional information (than presented in this section) provides more clear understanding on requirement, the Contractor is allowed to provide such information. The Contractor lists the additional information clearly and provides to the Employer along with the bidding documents.



PART 4: SITE INFORMATION

Document reference Title No of pages

This cover page 80

C4 Site Information 81

Total number of pages



1. General

The Kriel Power Station is situated approximately half way between Bethal and Ogies on the R545, being just over 30 km from each town and 10 km north-west of Kriel town.

2. Climate

Kriel Power Station is situated in a summer rainfall area with an average annual precipitation of about 750-mm falling almost entirely during the months of October to April. The average rainfall per month generally exceeds 40 mm during this period, although drought periods do occur which can last for 20 days or longer. Drought periods occur most frequently during the months of October/November and March/April. January is statistically the highest rainfall month with an average monthly rainfall of about 130-mm. June has the lowest rainfall with an average monthly rainfall of about 7 mm.

Approximately 85% of the annual rainfall occurs in the summer months and heavy falls of 125 to 150 mm occasionally occur in a single day. The annual average number of thunderstorms is about 75. These storms are often violent with severe lightning and strong (but short-lived) gusty winds and are sometimes accompanied by hail. This region has among the highest hail frequencies in South Africa; about 4 to 7 occurrences (depending mainly on altitude) may be expected annually.

January is normally the hottest month with an average daily maximum temperature of 27°C with a mean daily temperature in winter being about 16°C. Winter average daily temperatures vary from 18,5°C maximum to -1°C minimum. The extreme temperatures recorded range from 34,7°C to minus 12,4°C for the period 1920 - 1984. (Source: Weather Bureau, Pretoria)

Winds are generally light to moderate except during thunderstorms. Generally the prevailing wind directions are from the North West during the day and from the east at night. During daytime, the prevailing winds are from the north-western direction. During night-time, the prevailing winds are from the north-eastern direction. The highest recorded average wind speed is 17, 6 km/hour. The average wind velocity over the year is 14, 5 km/hour.

(Source: MSN weather & Weather 24, average records 2008 - 2009.)

3. Weather Data – Refer to Annexure A

4. Relative Humidity

Records for Bethal (2008 - 2009)The average relative humidity on an annual base is as follows:For 08:00 = 80%

14:00 = 52%20:00 = 73%

5. Prevailing Winds

Records for Bethal (2008 - 2009)Winds are mostly north-westerly except for February and March when they are easterly to south-easterly. The highest wind speeds are recorded from the south-east: on average 14km/h.

6. Other Climatic Factors

Records for Bethal (2008 - 2009)

Thunder occurs mostly from November to January with average of 35.7 days annually.a) Hail occurs mostly in December with average of 2.8 days annually.b) Fog occurs mostly in the winter months with an average of 19 days annually.c) Snow rarely occursd) Cloud coverage is highest in the summer months with annual average as follows:



08:00 = 2.8/8 14:00 = 3.8/8 20:00 = 3.1/8

e) Evaporation for the area is in rage of 75mm to 190mm per month. The highest evaporation occurs in December, and the lowest in June.

7. Topography

The surface topography of the Kriel area is typical of the Mpumalanga Highveld consisting in the main of a gently undulating plateau. The flood plains of the local streams are at an average elevation of ± 1540 meters above mean sea level and drainage generally is a northerly direction.

8. Air Quality

The existing and potential sources of air pollution in Kriel area are the following:

Kriel Power Station stack emissions Kriel Power Station dry dust (fly ash) handling plant Dust blow from the Eskom coal stock yard Dust blow from the roads in the area Seasonal dust blow caused by ploughing of farmlands, and dust blow off denuded fields Dust blow from dried out exposed surfaces of the wet ash dam.

However, Eskom utilises the majority of the top surface of the ash dam as an evaporation pan for polluted water, which means that the exposed surface is constantly wet. The sides of the ash dam have largely been rehabilitated, with the result that dust blow from the ash dam.
