Powering Tamil Nadu s Progress

Transcription

1 Powering Tamil Nadu s Progress From To Er.R.Kamaraj, B.E(Hons),M.E., The Director, Chief Engineer/Projects, Impact Assessment and HSM Division, TANGEDCO (A subsidiary of TNEB Ltd.), Ministry of Environment, Forests & Climate 5th Floor Western Wing, NPKRR Maaligai, Indira Parayavaran Bhavan, 144, Anna Salai, Chennai 2 Jor Bagh Road, Fax: New Delhi Mobile No Telephone no e.mail: cepr@tnebnet.org Kind attention Shri. B.B.Barman, Member Secretary Lr.No.SE/C/P&E/EE/EMC/AEE/C/F.NCTPS Stage III TPP/D.385/15, dt Sir, Sub: TANGEDCO North Chennai Thermal Power Station (NCTPS) Stage III (1X800 MW) Environmental Clearance Additional details submitted for consideration of Environmental clearance - Reg. Ref: 1. File No. J-13012/14/2012-IA. II(T) dt Minutes of Expert Appraisal Committee meeting held on ***** Tamil Nadu Generation and Distribution Corporation Ltd (TANGEDCO - A subsidiary of TNEB Ltd)) has proposed to establish a Supercritical Thermal Power Project with a single unit of 800 MW Capacity within existing North Chennai Thermal Power Station complex located in Ponneri Taluk, Thiruvallur District. Necessary application for obtaining final Environmental Clearance was filed on and the project was listed for hearing during the EAC meeting held on During the meeting Expert Appraisal Committee meeting held on , the committee considered the project and were sought some additional details to consider the project for issue of Environmental clearance. The requisite details are submitted as follows. 1. Action plan for harnessing of Solar power 2. Revised layout showing all the units of NCTPS and its facilities

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3 Point wise Replies for Clarifications raised in EAC meeting held on I. Action plan for harnessing solar power. Proposed to tap solar power by installing PV Solar Plant (with seasonal tilt Mechanism) on roof tops of Administrative& Power house buildings at cost of Rs.850 Lakhs to generate 1000 KW power In addition to this, Solar water heating systems will be provided on the roof tops of guest house and canteen at estimated cost of Rs. 50 Lakhs Total budget proposed for tapping Solar power is Rs.900 Lakhs II. Revised layout clearly depicting the various Units and facilities. Revised layout of NCTPS prepared by Institute of Remote Sensing/Anna university clearly depicting various units Stage I (3x210 MW), Stage II (2x600 MW) and Stage III(1x800 MW) and facilities viz., Coal conveyor, Cooling water inlet/outlet and Bottom ash disposal line to Ash dyke proposed are given as Annexure 1. III. FSA/ MoU for imported coal. MOU signed between MMTC Limited, a Government of India Enterprise and Tamilnadu Generation and Distribution Corporation Limited (TANGEDCO) dated 25 th May 2015 for supply of imported coal 2.51 MTPA for proposed project is attached as Annexure 2. IV. Letter from competent Port authority regarding handling of the coal. Letter issued by Kamarajar Port Limited (erstwhile Ennore Port Limited) dated for handling of imported coal for 1 x 800 MW NCTPP State III is attached as Annexure 3. V. Comparison of the year round base-line data before and after the Stage-I and II. The ambient air quality is being monitored at three locations (Vivekananda Vidyalaya, Valur; Kamaraj Port and near Cooling Water Pump House, NCTPS. The monthly minimum and maximum values are given below table and graph, the day wise results are attached as Annexure 4. Due to the execution of Vallur TPP(3x500 MW) and NCTPS Stage II(2x600 MW) in the vicinity and development of Ponneri Highway from Chennai,the pollution level was high during the period of 2007 to 2013 and the same is in the declining trend after 2014 since the construction activities in this area are over. The reading taken by TNPCB clearly shows the declining trend of SPM level in this area.

4 Monthly AAQ Minimum and Maximum values µg/m 3 (during Mar 2013 to Jul 2015) SO 2 NOx SPM Month Min Max Min Max Min Max March, April, May, June, July, August, September, October, November, December, Jan, Feb, March, April, May, June, July, August, September, October, November, December, Jan, Feb, March, April, May, June, July,

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6 VI. Stack diameter of all the stacks. The stack diameters of under execution and proposed power plants are given below. Details NCTPS Stage III (Proposed) Imported NCTPS Stage II (Commissioned during 2014) Domestic & Imported (70:30) Vallur TPP Commissioned during 2014) Domestic & Imported (70:30) Ennore Expansion (Under execution) Imported Ennore SEZ TPP (Under Execution) Imported Plant capacity (MW) 1X800 2X600 3X500 1X660 2X800 Raw material ,280 18, ,828 consumption (TPD) Height of the stack (m) Stack Dia (m) Velocity of flue gas (m/s) Flue gas Flow rate (m 3 /s) VII. Rechecking and the AAQ predictions. The ambient air quality predictions considering under execution and proposed power plants are rechecked the results obtained are given below. Post Project Scenario of Air Emissions for NCTPS 1X 800 MW-Units: μg/m 3 Particulars Particulate Matter (PM 10 ) Sulphur dioxide (SO 2 ) Oxides of Nitrogen (NOx) Baseline Scenario (Max) Predicted GLC (Max) Overall Scenario (Worst Case) MOEF/ CPCB Standards Post Project Scenario for Cumulative Air Emissions-Units: μg/m 3 Particulars Particulate Matter (PM 10 ) Sulphur dioxide (SO 2 ) Oxides of Nitrogen (NOx) Baseline Scenario (Max) Predicted GLC (Max) Overall Scenario (Worst Case) MOEF/ CPCB Standards

7 VIII. The water quality data was not properly presented. Hence, the same needs to be re-done for the fresh water and sea water. Three surface water samples were collected and analysed the results obtained are compared with surface water standards. Surface Water Locations No Name of the Easting lake SW1 SW2 Buckingham Canal Down Stream Buckingham Canal up Stream SW3 Bay of Bengal Northing Dist ance Km 13 11' 14.5" 80 18' 2.3" 3.3 NE 13 10' 32.1" 80 17' 28.7" 6.4 NE 13 11' 2" 80 19' 1.1" 3.4 E Landmark Ennore Thermal Power Station Near Jyothi Nagar bypass road Ennore Thermal Power Station Remarks Industrial Waste water joining into Canal without Proper treatment Industrial Wastewater Ennore Port Surface Water Physico - Chemical Results Parameter Units SW1 SW2 SW3 ph IS 2296:1992 Inland surface water standards A B C D E EC µs Un- Color Pt-Co Objectionab le TDS mg/l Turbidity NTU Total Hardness mg/l Calcium as Ca mg/l Magnesium as Mg mg/l Alkalinity as CaCO3 mg/l Chloride as Cl- mg/l

8 Fluoride as F- mg/l Nitrates as NO3 mg/l Iron as Fe mg/l Sulphate SO42- mg/l Sodium as Na mg/l Potassium as K mg/l DO mg/l COD mg/l BOD mg/l Zinc as Zn mg/l Lead as Pb mg/l Copper as Cu mg/l IX. Details of existing and proposed e-auction for fly ash, the LoIs from prospective takers along with quantities etc. At present TANGEDCO is disposing the fly ash by allotment to the Cement companies and the companies have established silos to collect the fly ash from the Power plant. Also the bottom ash is being supplied to the Brick manufacturers/ssi units for making fly ash bricks. Open tender system is being adopted to allot the fly ash to the companies. Now an MOU executed with M/s Dalmia cements (Bharat) Ltd, Dalmiapuram, Tamilnadu for off take of fly ash from the proposed NCTPS Stage III (1x800 MW) is furnished herewith Annexure 5. X. Explore various avenues for utilization of bottom ash. The bottom ash of the proposed Plant will be collected through dry bottom handling system and used for brick manufacturing and road laying purposes, excess if any disposed through existing ash dyke of NCTPS. XI. OHS data of the employees of existing Units. If survey not done, the same shall be done and submitted. The consolidated health checkup status of NCTPS I & II plant employees for year carried out through a clinical Laboratory/Chennai is enclosed.the statement of respective medical officers of existing NCTPS Stage I and NCTPS Stage II is given as Annexure 6.

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18 Sampling Point -2 Kamarajar Port Sampling Point -3 CW Pump house Sampling Point-1 Vivekananda Vidyalaya North Chennai Thermal Power Station AAQ Sampling points: 1. Vivekananda Vidyalaya West direction (6 km) 2. CW Pump House South direction (500m) 3. Kamarajar Port-North East Direction (2km)

19 AAQ data from 2013 to 2014 DATE Vivekananda vidyalaya, Vallur NOx SPM (µg /m³) (µg /m³) SOx (µg /m³) AAQ SAMPLING (24 Hrs) SOx (µg /m³) Kamaraj Port NOx (µg /m³) SPM (µg /m³) Cooling water Pump House, NCTPS NOx SPM (µg /m³) (µg /m³) SOx (µg /m³)

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22 AAQ Data for Vivekananda vidyalaya, Vallur AAQ SAMPLING (24 Hrs) Kamaraj Port Cooling water Pump House, NCTPS DATE SOx (µg /m³) NOx (µg /m³) SPM (µg /m³) SOx (µg /m³) 4 NOx (µg /m³) SPM (µg /m³) SOx (µg /m³) NOx (µg /m³) SPM (µg /m³)

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26 TNPCB Reading SPM Dir Dist km Sep-00 Apr-02 Nov-03 Dec-05 Nov-07 Mar-09 May-10 Mar-11 Mar July KATTUPPALLI CYCLONE SHED N CLIVE BUILDING S NAPPALAYAM SW Q TYPE QTR SSW PROJECT OFFICE VALLUR SW ATHIPATTU NW KR PALAYAM NNW

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35 NCTPS Stage I Greenbelt 1. North South Main Road, near Stores 2. Eastern side of Ash handling pump house

36 3 Back of Van Drivers' Rest room 4 Back of Package Boiler House

37 5 Eastern end front of Service Building 6 Adjacent to ESP 2

38 7 Southern side road of 230 kv Switch Yard 8 Opposite to Switch Yard gate

39 9 South West end of TG building 10 North South Main Road outside Civil offices

40 NCTPS Stage II Greenbelt 1 Grown up trees on the banks of CW channel 2 Grown up trees near Silos

41 3 New plantations 4 During plantation activity

42 5 Silo area - after plantation

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