PRE-FEASIBILITY REPORT

2014

M/S. DLF COMMERCIAL DEVELOPERS LTD CONSTRUCTION OF MULTI ACTIVITY COMPLEX

SY. NO: 129, 130, 131, 132, TSHB COLONY, GACHIBOWLI

SERILINGAMPALLY (M), RANGA REDDY DISTRICT

SUBMITTED TO

MINISTRY OF ENVIRONMENT & FORESTS GOVERNMENT OF INDIA

PARYAVARAN BHAVAN, LODHI ROAD NEW DELHI

SUBMITTED BY SV ENVIRO LABS &

CONSULTANTS Visakhapatnam

Phone: 0891-2755528

Email: svenviro_labs@yahoo.co.in Recognized by MoEF, and QCI –Accredited, S.No.147

S V E N V I R O L A B S & C O N S U L T A N T S E N V I R O H O U S E , B L O C K - B , B - 1 , I D A , A U T O N A G A R ,

PRE-FEASIBILITY REPORT | SV ENVIRO LABS & CONSULTANTS 2

1.0 INTRODUCTION

M/s. DLF Commercial Developers Ltd is headed at Gachibowli, Sy.No. 129, 130, 131 & 132 in

Hyderabad with its Registered Office at Shopping mall, Arjun Marg, DLF City Phase- I, Gurgaon,

Haryana.

M/s. DLF Commercial Developers Ltd acquired a land to an extent of 10.61Ha or 106128.0Sq.mts or

26.225 Acres proposes to construct multi activity complex at Sy. No. 129, 130, 131, 132 situated at TSHB

Colony, Gachibowli Village, Serilingampally Mandal, Ranga Reddy District.

In this direction, the company had approached for approvals and clearances from MoEF and other local

authorities for construction of multi activity complex to meet the needs of the society.

It is proposed to construct an IT complex, Commercial complex, Retail shopping and 645 service

apartments (3 podiums + GF + 9 floors), 2 basements for IT/Commercial and 3 basements for retail units

and service apartments.

Environmental clearance have been issued vide No: 21-538/2007-IA.III Dt: 18.06.2008 for a total

built up area of 6,04,651 Sq.mts to construct an IT complex, commercial complex, retail shopping and

service apartments in 2 basements + 3 podiums + G + 9 upper floors.

As of now, IT complex in 3 blocks with a total built up area of 3, 74,642.05 Sq.mts have been

constructed and excavation is in progress for retails and service apartment’s block.

The constructed IT complex is operational and got CFE vide order no. 316/PCB/CFE/RO-II-

RRD/HO/2010-2163 Dt: 20.11.2010 and 316/PCB/CFE/RO-II-RRD/HO/2012-1207 Dt: 22.06.2012

and CFO Order no. APPCB/HYD/RR-II/13415/CFO/HO/2013-5848 Dt: 13.03.2013.

And the balance built up area of 2, 30,008.95 Sq.mts will be completed as soon as possible.

S.no Licenses No. and Date Built up area Validity

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period *1 EC from

MoEF

21-538/2007-IA.III DT: 18.06.2008 6,04,651

Sq.mts

5 Years

18.06.2013

2 CFE from

APPCB

316/PCB/CFE/RO-II-RRD/HO/2010-

2163 Dt: 20.11.2010

6,04,651

Sq.mts

5 Years

20.11.2015

3 CFE From

APPCB

316/PCB/CFE/RO-II-RRD/HO/2012-

1207 Dt: 22.06.2012

14 nos of DG

Sets (11 x 1500

KVA & 3 x

2000 KVA)

5 Years

22.06.2017

4 CFO From

APPCB

APPCB/HYD/RRD/316/CFO/HO/2011

- 2117

13.10.2011 30.06.2012

5 CFO From

APPCB

APPCB/HYD/RR-

II/13415/CFO/HO/2013-5848 DT:

13.03.2013

3,74,642.05

Sq.mts

30.06.2015

1.1 ABOUT THE PROJECT:

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M/s. DLF Commercial Developers Ltd is in the process of construction of Project of multi activity

complex at Sy. No. 129, 130, 131, 132 TSHB colony, Gachibowli, Serlingampally (M), Ranga Reddy

District. The project will be spread over an area of 10.61Ha or 106128.0Sq.mts or 26.225 Acres.

The project of this magnitude would have various positive and negative impacts and the same are to be

addressed during design stage of the project to arrive at mitigation/ management measures. Environmental

impact Assessment is a tool that can be used for identifying, evaluating and for drawing the management

plan.

The area of village has educational institutions and number of residential & commercial apartments.

The area has developed into residential zone over the last 10 years.

The principles of low impact development are adopted during the design stage to ensure storm water

percolation, treated water reuse, energy conservation, and optimized usage of renewable resources

The parking provision follows the guidelines prescribed by HMDA and building policy of Andhra

Pradesh.

The boundaries of the project site is as follows

North - Road/CMC Ltd

South - Residential Buildings

East - Residential Buildings

West - Commercial Buildings

1.2 Details about Project Site Table: 1

Site Location Sy. No. 129 – 132, TSHB colony, Gachibowli, Serilingampally Mandal, Ranga Reddy District.

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1.2.1 TOPO MAP

Annual rainfall 812.5 mm

Min and max temp. 200C and 45.50 C

Avg. relative humidity 82 %

Avg. wind speed 6.5-20.4 KMPH

Latitude 17°26’51.29”N

Longitude 76°21’24.50”E

Predominant wind direction Summer Winter Monsoon

SE E NW

Nearest Highway NH-9 at 7.0 Kms

Nearest Airport Begampeta Airport

Nearest Railway station Hafeezpet Railway station at 3.85Kms Hi-tech city railway station at 3.85Kms

Nearest Human settlement Gachibowli

Nearest Town Gachibowli

Nearest Seaport None within 10 Kms

Nearest Water Bodies Khajaguda Cheruvu at 3.13 Kms Durgam cheruvu at 4.05 Kms Malaka cheruvu at 4.68 Kms Manikonda Cheruvu at 4.32 Kms Khajaguda Lake at 3.86 Kms Timmidkunta Lake at 2.75 Kms

Nearest Reserved forest None within 10 Kms

Nearest Indoor stadium Gachibowli Indoor stadium – 1.30Kms

Historical places None within 10 Kms

Nearest Hills None within 10 Kms

Nearest Barrage None within 10km Radius

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1.2.2 LAYOUT

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1.2.3 AREA DETAILS:

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Plot Area 1,06,128 sq m, i.e. 26.225 acre

Built-up Area

Total Proposed: 6, 04,651 Sq.m.

Construction completed: 3, 74,642.05 Sq.m.

Under construction: 2, 30,008.95 Sq.m.

(NO CHANGE IN PRODUCT MIX FROM THE APPROVED

CONCEPT)

Number of floors 2 Basements + 3 Podiums + Ground + 9 Floors;

Max height: 49.4 m

Parking facilities 8,372 ECS

(Surface: 176 + Basement: 3,543 + Podium: 4,653 )

1.3 RESOURCE REQUIREMENT: 1. CONSTRUCTION PHASE:

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The duration of construction of construction phase of the project is about 10 years from the date of

commencement of the work.

The major requirements of the construction phase include:

a. Construction machinery

b. Power

c. Fuel

d. Water

e. Man power

f. Temporary Housing

2. OPERATIONAL PHASE:

The major requirements of the complex in the operational phase include:

a. Power

b. Water Supply

c. Sewage Treatment Plant

2.1 PROJECT DESCRIPTION It is proposed to construct an IT complex, Commercial complex, Retail shopping and 645 service

apartments (3 podiums + GF + 9 floors), 2 basements for IT/Commercial and 3 basements for retail units

and service apartments.

2.2 WATER AVAILABILITY

Domestic water: It is proposed to draw domestic water from the Municipal Supply (GHMC), which have

been encouraging the bulk consumers. The water shortage if any during summer season will be drawn

from ground water sources. The fresh water requirement of the project during occupation stage is in the

order of 2474 KLD.

The water resource available with the Bore wells and Municipal authorities was studied to identify the

source and feasibility.

Water Requirement of the project

S.No Purpose Quantity (KLD) 1 Cooling & air conditioning 1890 KLD (Recycled waste water)

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2 Filter back wash 120 KLD (Fresh water)

3 Horticulture 85 KLD (Recycled waste water)

4 Domestic 3409 KLD (Fresh water – 2354 KLD + Recycled waste water –

1055 KLD)

Total 5504 KLD

(Fresh water – 2474 KLD + Recycled waste water – 3030 KLD)

2.2.1 WATER BALANCE

2354 KLD

120 KLD 120 KLD

1890 KLD

85 KLD

2.2.2 STP Proposed:

The Sewage Treatment plant of 1350 KLD and 1850 KLD capacity will be constructed separately in two

phases to the total capacity of 3200 KLD.

Mode of Final Disposal:

Treated waste water shall be reused for toilet flushing, cooling, development of horticulture etc.

2.2.3 SCHEME OF STP

Location of STP:

The proposed STP will be located in the basement of the building

Design Parameters

Capacity of STP: 3200 KLD

Domestic (3409 KLD)

Filter Back wash (120 KLD)

Air conditioning & cooling (1890 KLD)

Horticulture (85 KLD)

STP (3200 KLD capacity)

Municipal Supply (2474 KLD)

Treated sewage 3030 KLD

Toilet flushing 1055

3069 KLD 3189 KLD

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Characteristics of raw & treated sewage

Estimated Characteristics of Raw & Treated Sewage

Parameter Raw Sewage (Influent) Treated Sewage (After Tertiary

Treatment)

pH 7.5-8.5 6-8

BOD 3 day, 27°C (mg/l) 250-350 <20

COD (mg/l) 400-500 <60

Suspended Solids (mg/l) 250-450 <10

Oil & Grease (mg/l) 30 <5

Treatment Units:

The STP employs Activated sludge process working on the principle of extended aeration based on Fine

Bubble Diffused Aeration system in secondary treatment followed by tertiary treatment. The treatment

process includes the following unit operations:

Primary Treatment : Oil & Grease separator, Bar screen, Equalization Tank

Secondary Treatment : Aeration tank, Secondary clarifier, chlorine Contact tank

Tertiary Treatment : Multigrade Filter, activated carbon filter and Softener

Sludge Conditioning : Aerobic Digester, Sludge Thickner/filter press

Process Description:

Primary Treatment:

Raw sewage flows through oil & grease separator followed by a bar screen chamber and Equalization

tank. The bar screen is so designed that it can be cleaned manually from outside. Submersible solid

handling pumps are provided in the Equalization tank to pump the collected Raw sewage to the

aeration tank. An automatic level controller is provided in the Equalization tank to turn the pump off at

the predetermined low water level in the tank and to start the pump automatically when water level

reaches the high water level.

Air is introduced in the Equalization tank through submerged air diffusers, to prevent the sewage from

becoming septic during long retention or low load conditions and also keeping the organic matter in

suspension.

Secondary Treatment:

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The raw sewage that comes into the Aeration tank is aerated by using Fine Bubble diffusers mounted

in a grid at the bottom of the tank. Facility is made to pull up the diffusers for cleaning, if necessary.

Air is suspended to the diffusers by twin-lobe rotary air blowers located in the plant room. The

aeration system is designed in a way so as to achieve complete mixing of the sludge organisms with

raw sewage in order to maintain a Mixed Liquor suspended Solids (MLSS) concentration between

3,000 and 4,000 mg/l in the aeration tank.

From the aeration tank, this mixed liquor is taken into the clarifier. The liquid in the clarifier tank is

maintained in quiescent condition allowing the stabilized solids to settle at the bottom of the clarifier

for collection.

Part of the settled solids/sludge (activated sludge) is constantly pumped back into the aeration tank by

sludge recycle pumps. This return sludge undergoes further digestion in the aeration tank and also

provides the active organisms needed to digest the incoming raw sewage besides maintaining the

desired MLSS concentration.

The clarifier is provided with an overflow weir to collect the treated effluent and a scum-baffle to

prevent any floating matter from passing out in the final treated water. Treated water from clarifier

over-flows to the Chlorine contact tank where hypochlorite solution is added to disinfect the treated

waste water.

Sludge Conditioning:

Excess sludge from the bottom of the clarifier is taken to adjoining aerobic digester-cum-baffle to

prevent any floating matter from passing out in the final treated water. Treated water from clarifier

over-flows to the chlorine contact tank where hypochlorite solution is added to disinfect the treated

wastewater.

Tertiary Treatment:

The treated and disinfected water from the chlorine contact tank is passed through a Multi-grade filter,

an activated carbon filter and a softener for final storage in a treated sewage water tank. Water from

this tank is used for the cooling towers of the Air-conditioning system and DG /Gen sets and for

horticulture within the premises. Any excess treated sewage, particularly during lean period, like

winter is reused for toilet flushing. However, there may be occasional discharge into municipal sewer

in case of exigency for which “consent” from the concerned state pollution control board is taken.

Raw Sewage

Air Chlorine Oil & Grease Separator

Screen Chamber

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Air

Sludge Recycle

Manure

Horticulture

Recycle Toilet Flushing

Cooling towers

Schematic Flow Diagram of the Sewage Treatment Plant

2.3 Storm Water Drainage and Rainwater Harvesting

Storm Water Drainage System

The rainwater will be collected through piped drains and conveyed into rainwater harvesting system.

All storm water drains have been designed for adequate size and slope such that there shall not be any

flooding in the site. It shall be ensured that no waste water shall enter into storm water drainage

system.

Rain water Harvesting Plan

Equalization Tank (With Air Diffusers)

Aeration Tank (With Air Diffusers

Clarifier Chlorine Contact cum Treated effluent Tank

Sludge Holding Tank

Sludge Dewatering

Multi Grade Filter

Activated Carbon Filter

Softener Soft Water Tank

Flush Water Tank

Garden Water Tank

U V Filter

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Adequate rainwater harvesting will be provided by means of recharge into ground water. The details

are given below:

The rainwater collected from the rooftop and other paved areas within the project area will be

conveyed into the rainwater harvesting system consisting of Desilting-cum-filter chamber, oil &

grease separators and boreholes for recharge into the ground water. The collected rainwater after

passing through Desilting-cum-filter chambers would be injected into the ground water aquifer

through percolation boreholes. Oil & grease separators will be provided prior to the Desilting-cum-

filter chambers to arrest and separate any trace oil present in the rainwater. Requisite number of

rainwater injection boreholes will be provided.

2.4 SOLID WASTE GENERATION

S.no Solid waste

generated from

Quantity Method of Disposal

1 Organic waste 2768 Kg/Day Shall be converted into manure by

organic waste converter

2 Non Biodegradable

waste

9232 Kg/Day Shall be disposed to the municipal

dump site

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3 Waste oils 7000 LPA Shall be disposed to authorized

reprocessing units

2.5 DG Sets

S.no Details of stack Stack -1

1 Attached to DG Set

2 Capacity 11 x 1500 KVA, 8 x 2000 KVA & 1 x 1010 KVA

3 Fuel used Diesel

4 Stack Height As per CPCB norms

e Control Equipment Acoustic enclosure

2.6 ELECTRICITY CONSUMPTION

The electricity requirement is 38 MW

Energy Conservation Measures:

Energy Efficiency Measures

a. Usage of CFL lights and high efficiency lamps

b. Usage of high efficiency transformer

c. Usage of high efficiency motors for utilities

d. Usage of VFD drives for lifts, Pumps etc.

e. Minimum required light power density

f. The lighting levels will be selected to suit the functional requirements

g. Conventional switching arrangements using conventional switch plates will be provided

wherever required. Lighting control for common circulation areas will be based on timers.

Staircase lighting will be controlled by the switches within the staircase to ensure that the

lighting is ‘on’ when desired.

h. External lighting will be provided to illuminate Ground Floor main entrances, pathways,

parking areas and roadways. Feature lighting will be provided to enhance the architectural

features of the building. External lighting will be controlled by timers. The landscape lighting

will be based on recommendations of landscape architect.

Eco-friendly Measures:

1. Exploring possibilities of using Solar Lights

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Others:

The security will be handed over to a private agency. Water conservation measures will be updated

frequently and all the residents will be educated periodically.