Section 6 – Employer’s Requirements : Part A-Scope of Work 6A-7

Bidding Document for CEAIP – Part 3- Job B Procurement of Plant Single-Stage: Two-Envelope

(d) E’K line should be connected to the proposed Ambathale – Ethulkotte express line

through new SF6 load break switch (remote operated) at K.

(e) Install a new surge arrester set at new Gothatuwa town (E’) and connect KE’ 33kV

line to UG cable line coming from primary substation which is constructed by LECO.

1.2 CLIMATE

The climatic data given are for the standard period for 1961-1990. This data has

to be up dated with the latest available data.

The climate is that of a tropical region and the following meteorological

information is set out for guidance only.

(A) AIR TEMPERATURES

Records are available for the monthly mean daily maximum and minimum

temperatures with offset from average. The averages are taken for the standard

period 30 years and all shown in Table 1.2.1.

Table 1.2.1 – Mean Daily Maximum and Minimum Temperature

Ratmalana Colombo Katunayaka

January Max 29.0 31.1 32.1

Min 22.8 21.7 21.6

February Max 29.9 31.2 32.5 Min 23.0 22.2 21.9

March Max 30.6 31.8 32.7

Min 23.9 23.2 23.1

April Max 30.6 32 32.4

Min 24.8 24.1 24.1

May Max 29.8 31.3 31.4

Min 21.5 25.1 25.1 June Max 28.2 30.5 30.7

Min 21.4 25.2 25.1

(B) RELATIVE HUMIDITY

Records are available giving the following.

(i) Monthly mean maximum and minimum wet bulb temperatures with offsets

from average.

Section 6 – Employer’s Requirements : Part A-Scope of Work 6A-8

Bidding Document for CEAIP – Part 3- Job B Procurement of Plant Single-Stage: Two-Envelope

(ii) Extreme wet bulb temperature in each month.

(iii) Monthly means of the relative humidity obtained from dry and wet bulb

readings with offsets from average.

(iv) Monthly means of the relative humidity obtained from the minimum dry and

maximum wet bulb readings with offsets from average.

The averages are taken for the standard period of 1961-1990 and are

shown in Table 1.2.2 .

Table 1.2.2 - % Relative Humidity

Galle Colombo Katunayaka

January day 76 70 63

night NA 91 84

February day 73 66 65

night NA 90 86

March day 73 67 68

night NA 90 89

April day 76 71 71

night NA 90 89

May day 80 74 76

night NA 88 87

June day 82 73 76

night NA 86 85

July day 82 75 76

night NA 85 85

August day 83 75 74

night NA 84 85

September day 81 75 75

night NA 85 87

October day 81 76 76

night NA 89 90

November day 79 74 73

night NA 90 91 December day 79 71 70

night NA 88 88

(C) BAROMETRIC PRESSURES

Section 6 – Employer’s Requirements : Part A-Scope of Work 6A-9

Bidding Document for CEAIP – Part 3- Job B Procurement of Plant Single-Stage: Two-Envelope

Records are available for monthly means of the air pressure taken at 08.30 and

17.30 hours as mean sea level pressure. The averages are taken for the

standard period of –1961-1990 and varies from 1007.1 mB to 1013.1mB.

(D) RAINFALL

The rainfall figures given in Table 1.2.3 are based on average rainfall.

Table 1.2.3 - Rainfall

Galle Colombo Katunayaka

Jan 85.1 69.3 45.8

Feb 70.5 77.3 79.8

Mar 111.3 141.5 132.9

Apr 206.8 246.5 241.9

May 290.4 360.6 317.6

Jun 188.2 198.4 177.2

Jul 163.2 132.7 99.2

Aug 185.9 139.3 117.6

Sep 255.8 254.9 224.1

Oct 322.7 371.4 389.7

Nov 321.0 314.7 313.7

Dec 176.9 177.8 129.7

(E) WIND

Records available are given as follows.

Table 1.2.4 - 30 Year Averages (1961 - 1990) Wind Speed (m/S)

Galle Colombo

Jan 7.4 11.1

Feb 7.8 9.4

Mar 8.1 8.4

Apr 8.8 8.3

May 13.6 9.8

Jun 16.4 11.3

Jul 15.8 11.5

Aug 16.2 11.2

Sep 15.2 10.4

Section 6 – Employer’s Requirements : Part A-Scope of Work 6A-10

Bidding Document for CEAIP – Part 3- Job B Procurement of Plant Single-Stage: Two-Envelope

Oct 11.9 8.8

Nov 9.3 9.1

Dec 7.7 10.4

(F) STORMS

The frequency of thunder-storms is high, the isokeraunic level being

approximately 60 days per annum on average for the island.

1.3 PLANT & MATERIAL INCLUDING DESIGN SERVICES

Refer Plant & Materials from outside the Employer’s country and Plant &

Materials from within the Employers country in Schedules Nos 1.1, 2.1, 3.1, 4.1

and Schedule Nos 1.2, 2.2, 3.2, 4.2 in Volume 1 of 4, Section 4-Part A of Bidding

Document.

Refer Design services in Schedule Nos. 1.3, 2.3, 3.3, 4.3 in Volume 1 of 4,

Section 4- Part A of Bidding Document.

1.4 CIVIL WORKS, INSTALLATION, TRAINING & OTHER SERVICES

1.4.1 CIVIL WORKS, INSTALLATION & OTHER SERVICES

Refer Civil works in schedule Nos. 1.4, 2.4, 3.4, 4.4 of price schedules in Volume

1 of 4, section 4 Part A.

1.4.1.1 Adherence to the Environmental Mitigation Measures

Bidders are requested to comply with the requirements stated in the Chapter 1 ,

clause 1.42 of Section 6, Part B-Technical Specification and also to the

environmental safeguard measures described in the following documents

attached in the Section 6, Employer’s requirements, Part D-Supplementary

Information.

The said documents prepared in accordance with the governing acts and /or

guidelines, which are particularly relevant to this project may be inspected and a

copy each obtained free of charge from the office of the Project Manager- Clean

Energy and Access Improvement Project, Part 3 –Distribution Substation

Augmentation – Lot B at the following address

Section 6 – Employer’s Requirements : Part A-Scope of Work 6A-11

Bidding Document for CEAIP – Part 3- Job B Procurement of Plant Single-Stage: Two-Envelope

Office of the Project Manager (CEAIP-Part3-lot B)

Ceylon Electricity Board

First Floor,

50,Sir Chittampalam A.Gardiner Mawatha,

Colombo 02,

Sri Lanka.

Telephone: +94 -(0)11-2433117

Facsimile number: + 94 -(0)11 - 2348470

Electronic mail address: dgmpldr2@ceb.lk

Environmental Safeguard - Documents prepared under Environmental Assessment Guide lines of Asian Development Bank (ADB)

Initial Environmental Examination Reports For Clean Energy & Access Improvement project o 33kV Power Lines to Kiribathgoda and Katunayake Primary Sub Stations o 33kV incoming lines to Nawala and Kotikawatta Primary Substations