ENVIRONMENT CLEARANCEenvironmentclearance.nic.in/writereaddata/Online/TOR/15... · 2017-12-15 · Redevelopment of GPRA colony Conceptual Plan At Kasturba Nagar, New Delhi ... Defence

ENVIRONMENT CLEARANCE(CONCEPTUAL PLAN)

For

Proposed Redevelopment of General PoolResidential Accommodation (GPRA) Colony

At

Kasturba Nagar, New Delhi

By

Central Public WorksDepartment

Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi

Table of ContentsIntroduction......................................................................................................................................4

General.........................................................................................................................................4

Brief about Project Proponent.....................................................................................................4

Project Consultant........................................................................................................................5

Brief about Project.......................................................................................................................5

Site Surroundings and Connectivity................................................................................................5

Location.......................................................................................................................................5

Salient features of the site................................................................................................................8

Area Details.....................................................................................................................................9

Population Details..........................................................................................................................10

During Construction Phase........................................................................................................10

Land Environment.........................................................................................................................11

Topography................................................................................................................................11

Water Environment........................................................................................................................11

Construction Phase....................................................................................................................11

Operational Phase......................................................................................................................11

Wastewater Details....................................................................................................................13

During Construction Phase........................................................................................................14

During Operational Phase..........................................................................................................14

Sewage Treatment Technology..................................................................................................15

Technology Proposed- MBBR (Membrane Bio Reactor)..........................................................16

Process description................................................................................................................16

Sewer System.........................................................................................................................18

Preventive measures to Avoid Leaching....................................................................................19

Rainwater Harvesting and Storm Water Drain..........................................................................19

Need for Rainwater Harvesting.............................................................................................19

Efficacy of Rainwater Harvesting..........................................................................................19

Parking Details...............................................................................................................................21

Electrical details.............................................................................................................................22

Power Details.............................................................................................................................22

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D. G. Sets Details...................................................................................................................22

Solid Waste Details........................................................................................................................22

During Construction Phase of the Proposed Building...............................................................22

C & D waste of Existing Buildings...........................................................................................23

During Operational Phase..........................................................................................................24

Collection and Segregation of waste.....................................................................................24

Treatment of Waste................................................................................................................24

Disposal.................................................................................................................................25

Landscape Details..........................................................................................................................26

Details of Construction Materials................................................................................................2

Table 1: Project Consultants Involved.............................................................................................5Table 2-Geographical Co-ordinates of the site................................................................................5Table 3: Site Surroundings and Connectivity..................................................................................6Table 4: Salient Features of the site.................................................................................................8Table 5- Area Details of the Site......................................................................................................9Table 6- Population details for proposed building.........................................................................10Table 7- Water balance Diagram during dry season......................................................................13Table 8-Water balance Diagram during monsoon season..............................................................14Table 9: Design Parameters for Sewage Collection System..........................................................15Table 10: Wastewater Details.........................................................................................................18Table 11-Calculation for Strom Water Load for the Proposed Site...............................................20Table 12: ECS Required................................................................................................................22Table 13: Parking Proposed...........................................................................................................22Table 14: Calculation of Solid Waste Generation of Proposed Building.......................................24Table 15- List of trees to be planted..............................................................................................27

YFigure 1-Calculation for Daily Water Demand..............................................................................11Figure 2-Schematic diagram of STP technology...........................................................................18Figure 3-Typical design for modular RWH*.................................................................................21Figure 4: Solid Waste Management for Construction Phase.........................................................23Figure 5: Solid Waste Management Scheme -Domestic Waste.....................................................26

Annexure 1- Google and Topographical map showing site and surroundings within 500mtrs, 2km, 5 km and 10+15 km..................................................................................................................8

Conceptual Plan

Page 3


Introduction

General

The Ministry of Environment, Forest and Climate Change has notified the Environmental

Impact Assessment (EIA) Notification, 2006 under the provisions of the Environment

(Protection) Act, 1986, which regulates development and their expansion/modernization

of 39 sectors/activities listed in the Schedule to the EIA Notification, 2006. As per the EIA Notification 2006, and its amendments all the building construction

projects/area development projects and township projects comes under schedule 8 and

projects covering an area ≥ 150 ha and/or built up area ≥3,00,000 sq .mtrs they come

under schedule 8 (b). The application for environmental clearance shall comprise submission of Form 1, Form

1A, and Conceptual Plan along with EIA/EMP Report incorporated proposed ToR in

MoEF. The EIA/EMP shall be prepared on the basis of Approved ToR issued from EAC

and will be submitted to the EAC for appraisal and due recommendation and suggestions.

Following the appraisal of the project to the satisfaction of the EAC, Environmental

Clearance shall be granted. Total Built up area of the proposed site is 7,67,008.962 m2

Brief about Project Proponent

CPWD is a central government owned authority in charge of public sector works. The

Central Public Works Department, under the Ministry of Urban Development, builds and

maintains public buildings. It is the prime engineering department of Government of union of India and its

specifications and manuals are followed by local public works departments and

engineering wing of other departments.

CPWD consists of three wings in execution field:

B&R (Buildings and Roads) E&M (Electrical and Mechanical) Horticulture

Project Consultant

Details regarding Project consultants involved are given below;

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Table 1: Project Consultants Involved

Project Team Details

Architects/ MEPConsultant

CP Kukreja ArchitectsD-1, Green Park, AshirwadComplex, New Delhi - 110016,[email protected]

Environment Consultant Amaltas Enviro IndustrialConsultants LLP (AEC).A-73, Sector 65, Noida, Up

Landscape Architect Jasleen WaraichProject ManagementAgency (PMA)

Central Public WorksDepartmentsA-Wing, Nirman Bhawan,New Delhi-110108, [email protected]

Brief about Project

This is the redevelopment of general pool residential accommodation colony at Kasturba nagar,

New Delhi. The existing flats including community/social facilities will be demolished and new

set of flats and community social facilities will be developed as per the norms of MoUD for

GPRA. The proposed project shall be green building project. The project will be developed by

CPWD.

Site Surroundings and Connectivity

Location

The proposed site is connected to Delhi, Noida, and other NCR regions. It is surrounded by

places such as JLN stadium, Defence Colony, Lajpat Nagar, Dilli Haat, Arya Nagar and Kidvayi

Nagar within 5km of the area of the site.

Geographical co-ordinates of the site are given in table

Table 2-Geographical Co-ordinates of the site

Lattitude LongitudeCorner-1 28034’43.03”(N) 77013’45.02”(E)Corner-2 28034’30.97” (N) 77013’44.63” (E)

Corner-3 28034’32.31” (N) 77013’34.19” (E)Centre of the Plot 28034’36.11” (N) 77013’34.43” (E)Corner-4 28034’37.37” (N) 77013’19.79” (E)

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mailto:[email protected]

mailto:[email protected]


Corner-5 28034’44.81” (N) 77013’20.32” (E)

Site is well connected to transport facilities as well as surrounded by densely populated areas.

GPRA colony is flanked by bhisham pitamah marg to its East and Ch. Chandu Lal Balmiki Marg

to the West. Sewa Nagar Railway station and barapullah road is to its north direction.

Site surroundings and site connectivity within 10 km are shown in below table

Table 3: Site Surroundings and Connectivity

S.No. Particulars Name Distance and Direction 1. Nearby Railway

Stations

Sewa Nagar Railway Station Lodhi Colony railway Station Sarojini Nagar railway station Safdarjung railway station

Adjacent to the Site in N

0.9 Km in NNW

2.87 km, W

3.88 km, W2. Nearby Airports Safdarjung Airport

Indira Gandhi International

Airport

1.92 Km in WNW

5.12 km in SSW3. Nearby Populated

Areas Subhash Bazar Arjun Nagar Shiv Nagar Lodhi Road quarter Shri Niwaspuri Defence Colony Rishi Nagar Lodhi Colony (Block-13) Kidwai Nagar Masjid Moth Village Andrew’s Ganj Lajpat Nagar

0.22 km in SSW

0.41 Km in SSE

0.34 km, SSW

0.58 km, NNE

0.97 km, E

0.85 km, SE

0.66km, WSW

0.78 km,N

1.28km, SW

1.78km, SSW

1.86km,SE

2.03km, SE4. State Boundary UP – Delhi state border

Delhi- HR Border7.45 km,ENE

10.42 km, SSE

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5. Nearby Roads Ch. Chandu Lal Balmiki Road Barapullah Road Bhisham Pitamah Marg NH-2 Lala Lajpat Rai Road NH-24 NH-08

0.74 km, SWS

0.25 km, N

Adjacent to the site

2.79 km,E

1.28km,E

3.83 km,NE

6.04 km, E6. Nearby Metro

stations

Lajpat Nagar Jungpura Metro Station INA Metro Station AIIMS Metro Station Jorbagh Metro station Moolchand Metro Station Race Course Metro Station Khan Market Metro station

1.30 km, SE

1.52 km, NE

1.59 km, WSW

2.00 km, SW

1.61 km, NW

1.71 km, SE

2.61km,NNW

2.83 km, N7. Nearby Hospitals Nehru Homoeopathic Medical

College and Hospital Medanta Mediclinic, Defence

Colony Harvik Speech and Hearing

Clinic, Lajpat nagar AIIMS, C G.H.S. Wellness Center 15,

Laxmi Bai Nagar Sama Hospital, Siri Fort Road

0.74 km, SE

0.95 km, ESE

1.04 km, SSE

1.79 km, SW

2.0 km, SW

2.56 km, S8. Nearby Schools National Institute of

Management, South Extension Fostiima Business School, SE The Indian School,

Ayurvigyan Nagar Little Hands Pre-school -

Kindergarten School-Defence

Colony

0.94 km, SSW

0.73 km, SW

2.35 km, SSE

1.03 km, SE

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9. Places of worship Arya Samaj mandir, Pant Nagar Mandir Santan Dhrm Mandir,Lajpat

Nagar

Adjacent to the site

1.99 km, NE

2.09km, SE

10. Water Bodies Sanjay Lake Yamuna River

1.62 km,W

4.32 km,NE11. Forests Southern Ridge Forest

Central Ridge Forest5.89 km in SW

6.12 km in WNW (Source: Google Earth Pro)

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Figure 1-Project Site and Surroundings within 2 km


Google map and topographical map showing site and surroundings are attached as annexure.

Annexure 1- Google and Topographical map showing site and

surroundings within 500mtrs, 2 km, 5 km and 10+15 km

Salient features of the siteThe salient features of the project are as follow.

The redevelopment of GPRA colony is proposing residential flats of type II- VI with other

amenities like primary and secondary school, convenient shopping, banquet hall etc.;

Table 4: Salient Features of the site

S. No. Description Proposed1. Plot Area 1,91,537.341 m2

2. Proposed Built Up Area 7,67,008.962 m2

3. Maximum Height with Mumty 44 mtrs

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4. Cost of ProjectRs. 2000 Crores (Building

Construction and Development)5. Expected Population 28,1746. Total Water Requirement 3,084 KLD7. STP Capacity and Technology 3,000 KLD, MBBR8. No. of RWH Proposed 269. Parking Proposed 9,673 ECS10. Solid Waste Generation 8,476 kg/day11. Total Power Requirement 20,000 kW

Area DetailsThis is re development of existing general pool residential accommodation colony at Kasturba

nagar, New Delhi. Total area of the site is 1, 91,537.341 m2 (19.15 Hectare).Existing structures at

the site will be demolished first. Built up area of the total demolished area is approx. 1, 22,000

m2.However proposed built up area is 7, 67,008.962 m2.

Area details are given in table below.

Table 5- Area Details of the Site

S.No. Particulars Area (m2)1. Plot Area 1,91,537.341

2. Area Under amenities (Schools, Commercial, Banquet,Dispensary)

22,100

3. Net Plot area 1,69,437.341

4. Permissible Ground Coverage (33% of Plot area) 63,207.32

5. Proposed Ground Coverage (21 % of Plot area)

Residential

Commercial+ Community

School

Others(Dispensary+ Religious Building)

40,166.89732,7862,1003,2802,000

6. Permissible FAR for residential (@3%) 5,08,312.02

7. FAR Achieved

Residential FAR

Commercial FAR

Community FAR

Primary and Secondary School FAR

Others(Dispensary, Religious Building)

3,86,857.323,62,497.325,40096016,8001,200

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8. Non-FAR Area 98,108.642

9. Built Up Area 7,67,008.962

10. Basement Area

Basement I

Basement II

2,33,7341,15,3401,18,394

11. Podium Area 19,500

12. Stilt Area 27,009

13. Dhalaos area 200

14. ESS Area 1,600

15. Open Area

Road area Surface Parking Area

1,29,270.44450,20018,500

16. Proposed Landscape Area (42.46 % of Open Area) 54,895

17. Height of the Tallest building (meters) 44 meters

Population Details

During Construction Phase

The total manpower requirement during construction phase of the site will be an approximate

300-350 person which includes workmen, labourers, supervisors, engineers, architect and

Manager.

During Operational Phase

The total population of the project will be 28,174 persons that include residents, staff and visitor

population .The detailed population breakup is given in table below

Table 6- Population details for proposed building

S. No. Description Floor Area(m2)/D.U.

Occupant Load, 100m2Floor Area /Person

TotalPopulation

1. Residential Facility

For Type II and Type IIIunits

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Residents 2,406 D.U. 4.5 10,827Staff 217Visitors 541For Type IV,V,VI unitsResidents + Servant units 1,272 D.U. 6.5 8,268Visitors 413

7. Commercial Facility

Shopping complex 5,400 33.3Staff 4.3 232Visitors 1,800Banquet Hall 960 166.6Staff 22Visitors 1,599

8. Educational Facility16,800 25

Staff/Students 3,990Visitors 210

10. Dispensary20 beds

Patient @1person/bed

20

Staff 15Visitors 20Total Population (1-4) 28,174

Land Environment The site is being proposed under the redevelopment of GPRA colony. Existing structure of

the site shall be demolished and new construction is proposed. The site will be developed by

CPWD.

Topography Physically the natural capital territory of Delhi can be divided into 3 segments - the Yamuna

flood plain, the Ridge and the Plain. The entire area of the national capital territory of Delhi

is categorized as Bangar or the plain. The land of the plain is mostly fertile The entire area of the site is monotonously flat. The project area possesses plain terrain.

Highest elevation levels is 216 meters & the lowest levels is 214 meters.

Water Environment

(REQUIREMENT AND CONSUMPTION)

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Construction PhaseDuring the construction phase the water requirement will be met from Private water or treated

wastewater from Nearby STP. No ground water will be extracted for construction activities.

Operational Phase

Total water requirement for proposed redevelopment of GPRA colony is approx. 3,071 KLD.

Total fresh water requirement is approx 1,954.73 KLD. The main sources fresh water will be

DJB

However the secondary sources of the water are

Tanker supply (For Emergency Use only) Treated Effluent from an external centralized sewage treatment Plant

Total quantity of wastewater generation will likely to be 2,474 KLD. The generated sewage will

be collected and treated in the in-house Sewage Treatment Plant of 3,000 KLD capacity. The

treated wastewater will be re used for flushing and gardening. Water Balance diagram during

Non Rainy season and Rainy season are shown below.

Figure 2-Calculation for Daily Water Demand

S.No. DescriptionPopulation/area (m2)

water consumption (litres/capita/day)

Water Requirement ForTotal water required (KLD)Fresh use

(KLD)Flushing/Recycled (KLD)

1.

Residential Facility

For Type II and Type III units

Residents 10,827 135 974.48 487.17 1461.645

Staff 217 45 6.51 3.25 9.765

Visitors 541 15 5.41 2.70 8.115 For Type IV,V,VI units

Residents + Servant units

8,268 135 744.16 372.02 1116.18

Visitors 413 15 4.13 2.06 6.195

Commercial Facility

Shopping complex Staff 232 45 6.96 3.48 10.44

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Visitors 1,800 15 18.00 9.00 27

Banquet Hall 0.00 0.00 0

Staff 22 45 0.66 0.33 0.99

Visitors 1,599 15 15.99 7.99 23.985

Educational Facility

Staff/Students 3,990 45 119.71 59.84 179.55

Visitors 210 15 2.10 1.05 3.15

Dispensary 0.00 0.00 0

Patient 20 340 4.53 2.27 6.8

Staff 15 45 0.45 0.22 0.675

Visitors 20 15 0.20 0.10 0.3

Sub Total (Domestic Water) 1,903.29 951.50 2,854.792. OTHER AREAS

Landscape (42.46 % of Open Area)

54,895 3 ltrs/day 164.69 164.69

HVAC** 320 TR 10 ltrs/TR/hr 32 32

D.G. Cooling* (6*500 kVA,6* 400 kVA)

5,400kVA

0.9l/kVA/hr 19.44 19.44

Total (1+2) 1,954.73 1,116.19 3,070.92

** HVAC will be operational for 10 hours.* D.G. sets will be operational for 4 hours

Wastewater DetailsS.No. Details Water (KLD)

1.Fresh Water Requirement (60-65% of Domestic water) 1,903.29

2. Water Requirement for Flushing Purposes (30-35 % of Domestic water)

951.50

3. Total Wastewater Generated (80% of fresh wastewater + 100% Flushing wastewater)

2,474.13 or say 2.4 MLD

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Total Water Requirement (3,071 KLD)


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Fresh Water(1,903 KLD)

[@60-65 % of DomesticWater]

HVAC/D.G. cooling(32+19 KLD)

Treated Water Reuse(1,116 KLD)

Horticulture(165 KLD)

Flushing Water(951 KLD)

[@ 35 % of Domestic Water]

Wastewater Generation(2,474 KLD)

(@ 80% of Fresh + 100 %Flushing)

Treated wastewater(1,979 KLD)

STP Capacity- 3,000 KLDTreated wastewater reuse inhorticulture area/colonies

under CPWD(863 KLD)

Table 7- Water balance Diagram during dry season

Fresh Water SupplyWastewater SupplyTreated water Supply


During Construction Phase

The quantity of sewage generation during the construction phase will be approx. 13.54 KLD.

Thus the sewage will be treated by providing small septic tanks, soak trenches and sulabh

shauchalaya type mobile toilets.


Quantity of sewage generated during operational phase shall be 2,474 KLD. Thus the sewage

will be treated through sewage treatment plant of capacity 3,000 KLD. The treated sewage will

be re used for flushing (951 KLD) greenbelt development (165 KLD). Surplus treated

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Total Water Requirement (2,905 KLD)

Fresh Water(1,903 KLD)

[@60-65 % of DomesticWater]

Treated Water Reuse(951 KLD)

HVAC/D.G. cooling(32+19 KLD)

Flushing Water(951 KLD)

[@ 35 % of Domestic Water]

Wastewater Generation(2,474 KLD)

(@ 80% of Fresh + 100 %Flushing)

Treated wastewater(1,979 KLD)

STP Capacity- 3,000 KLD

Treated wastewater reuse inhorticulture area/colonies

under CPWD(1,028 KLD)

Table 8-Water balance Diagram during monsoon season

Fresh Water SupplyWastewater SupplyTreated water Supply


wastewater during dry season i.e. 863 KLD and during monsoon season i.e. 1,028KLD will be re

utilized in other colonies/areas under CPWD.

Sewage Treatment Technology

The design of sewage network shall be done in accordance with the CPHEEO guideline, NBC

guidelines and reverent Indian Standards. Sewage generation is assumed to be 100% of flushing

water and 80% of domestic water.

The following parameters/ site conditions shall be kept in mind when designing the sewage,

Sludge and storm water drainage system.

Natural slope of the area. Layout of different facility in the complex; Possibility of using complete or part of the existing sewage network; Sub-soil water table; Provision of Sewage lifting station; ( if required) Provision of venting arrangement for manholes; Construction of manholes & laying of pipes considering ground condition; Termination of vent cowl at terrace level; Provision of adequate slope for horizontal header in the under slung pipes especially for

public toilets Sewage flow starts with fractional capacity and builds up to full capacity in due course.

An operational plan to meet this demand from a low flow to full flow will be part of the

design.

A summary of board design parameters to be adopted for designing Sewage supply system is

given below.

Table 9: Design Parameters for Sewage Collection System

Different Use Norm UsedType of Collection System Separate System Design Period -30 years for sewers and appurtenances -15

years for pumps and electric equipment’s Peak Factor 3 Minimum velocity 0.6 m/sec Maximum velocity 3.0 m/sec Minimum size of pipe 250 mm (ID) Minimum depth of Sewer 1.0 m from FGL (0.6 m minimum cushion) Hydraulic Formula for calculation for design Manning’s formula V= 1/n*(R^2/3)

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of sewer lines (As per CPHEEO manual

3.4.2.1 page no-36)

*(S^1/2 ) V= Velocity R = Hydraulic mean

depth = A/P S = Slope Flow conditions in pipe up to 400 mm dia 0.50 full Flow conditions in pipe up to 300 mm dia 0.67 full Manning’s Co-efficient ‘n’ 0.011 Shape of sewers Circular Material of sewers HDPE Manhole Sizes As per manual on sewerage and sewerage

treatment/ IS4111:1985 For depth above 0.9m & up to 1.65m 900 mm diameter For depth 1.65m & up to 2.3m 1200 mm diameter For depth 2.3m & up to 9.0m 1500 diameter

Technology Proposed- MBBR (Membrane Bio Reactor)

The MBBR system consists of an aeration tank (similar to a activated sludge tank) with special

plastic carriers that provide a surface where a biofilm can grow.

An external sewage network shall collect the sewage from all units, and flow by gravity to the

proposed sewage treatment plant.

Following are the benefits of providing the Sewage Treatment Plant in the present circumstances:

Higher effective sludge retention time (SRT) which is favorable for nitrification Responds to load fluctuations without operator intervention Lower sludge production Less area required Resilient to toxic shock Process performance independent of secondary clarifier (due to the fact that there

is no sludge return line).

Process description

The Raw Sewage from last manhole will be collected in raw effluent collection

sump via a Sluice Control Valve; bar screen & Oil & grease trap to remove the grit

material. The screens and grit chamber shall be accessible so that they may be manually

cleaned from time to time. The waste water from the OGT should then pass into the

Collection Chamber/Collection Sump, from where the sewerage shall be pumped into the

Equalization Tank. The design of Equalization tank should cater for the condition that the waste

water generation may not be uniform and higher quantity may come out during peak hours.

There may be very low flow condition for few hours. To optimize the size of the plant, the

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plant design should cater for continuous operation and hence a buffer should be provided to

store the waste water during its peak hour generation and supply the same during lean or

no flow hours. The equalization tank is provided to homogenize the waste water quality

and also even out flow fluctuations and feed waste water of uniform quality at constant rate

to subsequent treatment units. Air mixing should be provided to mix the contents of the

equalization tank. An aeration grid should be provided to mix the contents of the

equalization tank and also to avoid septic conditions in the tank. From the equalization tank

the wastewater will be pumped into anoxic Tank on a controlled rate. By-pass line shall be

provided from the pumping system which shall only be provisional for disposal of sewage

to mobile sewage tanker for emergency purposes. From the anoxic tank the wastewater will

be overflowed into MBBR Tank. The MBBR process uses small plastic carrier elements to provide growth sites for

bacteria attachment in a suspended growth medium. The carrier elements shall allow a

higher biomass concentration to be maintained in the reactor. This shall increase the

biological treatment capacity for the given reactor volume.The carrier elements shall be

continuously kept in suspension by the aeration system. The agitation pattern in the reactor

shall be designed to provide an upward movement of the carriers across the surface of the

retention screen which creates a scrubbing effect to prevent clogging. Combination of fine &

coarse bubbles may be provided to provide oxygen as per detailing. From the MBBR tank mixed liquor shall flow by gravity into the secondary

settling tank. The solids will settle in the tank. The sludge that settles down shall be

transferred to sludge holding tank via sludge loading pumps, with provision of sludge return

to the bioreactor if necessary. From the settling tank, treated wastewater will flow into

chlorine contact tank/clarified water tank. In this tank, chlorine will be added in the form of

calcium or sodium hypochlorite solution by a suitable chlorinator/Dosing system. Treated

water after chlorine contact tank shall be clear, odourless, low BOD, low suspended solids,

which shall be of quality which is acceptable as per standards prescribed by

CPCB/Environmental norms for disposal direct ly into public/natural drain. The treated water from chlorine contact tank is fed by means of filter feed pump

sets to pass through dual media filters, activated carbon filters and stored in the filtered

water tanks. The activated carbon filters shall ensure removal of all coloration and odours

present in the treated effluent. Backwash of Filters and shall be done intermittently as per

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requirements. The filtered water being stored in the filtered water tank shall again be dosed

with chlorine by a suitable Chlorinator/Dosing system and a residual Chlorine level of 0.5

ppm shall be maintained. The filtered, clean and odourless water from filtered water tank is then fed

through a variable frequency drive hydro-pneumatic system to the external treated effluent

rings as per the master plan, from where connections are taken to the garden hydrant system

and to each unit for flushing water as per detailing. According to the guide lines of Ministry of Environment and Forest the UV

system will be provided on the discharge point of treated effluent supply lines to ensure

100% pathogen free treated water for recycling and re-use. The UV system shall be provided

as online installation on the treated water supply line being supplied to the external

distribution ring. Excess sludge from the clarifier/settling tank will be taken periodically into

sludge holding tank. In this tank sludge will be aerated for self -stabilization. Air will be shut

off periodically and superannuate water will be transferred to the aeration tank creating

stabilized sludge. The final sludge shall be de-watered through a centrifuge mechanism.

Sludge loading arrangements shall also be provided for direct disposal of sludge to sludge

tankers / trolleys.

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Figure 3-Schematic diagram of STP technology

Sewer SystemThe alignment and slope of the sewer line will follow the road network, drains or natural ground

surface and will be connected to the trunk sewers. The discharge point will be a treatment plant,

a pumping station, a water course or an intercepting sewer. Pumping stations would be provided

at places where the natural slope of the terrain is insufficient to permit gravity flow or the cost of

excavation is uneconomical to do the same

Table 10: Wastewater DetailsParticulars QuantityDaily load 2,474 KLDDuration of flow to STP 24 HoursTemperature 320 C

Inlet Outlet (Treated Wastewater )pH 6.0 – 9.0 7.0-8.0T.S.S. (mg/l) 300-400 <20BOD5 270 C (mg/l) 250-300 <10COD (mg/l) 400-600 <50Oil & grease ABS (mg/l) <50 <10

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Preventive measures to Avoid Leaching

Treated sewage from Sewage Treatment Plant will be conveyed to Treated Sewage Tank through

pipelines. All the joints from piping system will be checked periodically and carrying treated

wastewater pipes will be laid in conduits wherever road crossings are expected. Thus no leaching

of treated sewage into nearby water courses shall take place. Supervisors will be employed for

overall operation & maintenance of water supply, waste water treatment and other utility

services.

Rainwater Harvesting and Storm Water Drain

A rainwater harvesting system comprises components of various stages -transporting rainwater

through pipes or drains, filtration, and recharging the ground water through tanks. Percolation

structures will be constructed for ground water recharge.

Runoff from the first spell of rain carries a relatively large amount of pollutants from the air and

catchments surface so the system will be provided with a filtration pit consisting of layers of

sand, gravel and pebbles of relevant sizes to remove impurities from the collected rainwater.

Need for Rainwater Harvesting

Surface water is inadequate to meet the daily demand and we have to depend on ground water.

Due to rapid urbanization, infiltration of rain water into the sub-soil has decreased

drastically and recharging of ground water has diminished.

Rainwater harvesting prevents the flooding of low-lying areas in the site.

Efficacy of Rainwater Harvesting

The storm water disposal system for the premises shall be self-sufficient to avoid any

collection/stagnation and flooding of water. The amount of storm water run-off depends upon

many factors such as intensity and duration of precipitation, characteristics of the tributary area

and the time required for such flow to reach the drains. The drains shall be located near the

carriage way along either side of the roads. Taking the advantage of road camber, the rainfall run

off from roads shall flow towards the drains. Storm water from various areas/shall be connected

to adjacent drain by a pipe through catch basins. Therefore, it has been calculated to provide 26

rainwater harvesting pits at selected locations, which will catch the maximum run-off from the

area.

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1) Since the existing topography is congenial to surface disposal, a network of storm water

pipe drains is planned adjacent to roads. All building roof water will be brought down

through rain water pipes.

2) Expansion of storm water system consists of pipe drain, catch basins and seepage pits at

regular intervals for rain water harvesting and ground water recharging.

Rain water harvesting has been catered to and designed as per the guideline of CGWA. Peak

hourly rainfall has been considered as 25 mm/hr.. Inside the recharge pit, a recharge bore is

constructed having adequate diameter with PVC slotted pipe up to a layer where sandy aquifers/

deeper aquifer permeable layers exist. The ground water level in the area is found at range of 20-

30 mbgl. The bottom of the recharge structure will be kept 5 m above this level. At the bottom of

the recharge well, a filter media is provided to avoid choking of the recharge bore. Design

specifications of the rain water harvesting plan are as follows:

Catchments/roofs would be accessible for regular cleaning.

The roof will have smooth, hard and dense surface which is less likely to be

damaged allowing release of material into the water. Roof painting has been avoided

since most paints contain toxic substances and may peel off.

All gutter ends will be fitted with a wire mesh screen and a first flush device

would be installed. Most of the debris carried by the water from the rooftop like leaves,

plastic bags and paper pieces will get arrested by the mesh at the terrace outlet and to

prevent contamination by ensuring that the runoff from the first 10-20 minutes of rainfall

is flushed off.

No sewage or wastewater would be admitted into the system.

No wastewater from areas likely to have oil, grease, or other pollutants has been

connected to the system.

The quantity of storm water load for the proposed construction project is given below.

Table 11-Calculation for Strom Water Load for the Proposed Site

S.

No.

Type of

Surface

Catchment's Area Run

off

Coff.

Intensity

of Rainfall

(mm/hr)

Discharge

(Run Off)

[Q=10CIA]

Total

(m3/hr)

[Q]

sq. m Ha.

Page 23


[C] m3/hr

a. Building

Green Area 54,895 5.48 0.20 25 10×0.20×25×5.4

8

274

Paved Area 96,475.4

4

9.64 0.75 25 10

×0.75×25×9.64

1,807.5

Roof top

area

40,166.8

9

4.01 0.9 25 10

×0.85×25×4.01

902.25

Total 2,983.75b. Considering 15 mins (0.25) retention period 745.94

c. Taking the effective length, breadth and depth of desilting chamber and

Recharge pit as (4 ×2×2.5mtrs) and (3×2×1.5mtrs) respectively, Total

Combined capacity of Desilting chamber and Recharge Pit

29 m3

Total No. of rainwater harvesting Proposed 26

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(Source: Central Ground Water Board, Manual on norms and standards for environmentClearance of large construction projects, MoEF&CC)* Dimensions may vary

Parking DetailsAdequate provision will be made for car/vehicle parking at the project site. There shall be

adequate parking provisions for visitors so as not to disturb the traffic and allow smooth

movement at the site.

Proposed project will be consists of basement and open parking. The parking space criteria and

area requirement provided are summarized in the table below. Parking details are designed as per

Delhi Building Bye Laws

Table 12: ECS Required

As Per DDA

Page 25

Figure 4-Typical design for modular RWH*


Parking Required Area (m2) Total (ECS)

For the Residential building 2 ECS/100 m2

of FAR area3,62,497/50 7,250

For other Amenities 2 ECS/100 m2

of FAR area24,360/50 487

Total Parking Required (ECS) 7,737

Table 13: Parking Proposed

Description Area Required for 1ECS

Area (m2) Parking Proposed( ECS)

In Basement Basement-1Basement-2

1 ECS/32 m2 of area1,15,3401,15,340

7,208

In Stilt 1 ECS/28 m2 of area 27,009 965In Podium 1 ECS/28 m2 of area 19,500 696In Open 1 ECS/23 m2 of area 18,500 804Total Parking Proposed(ECS)

9,673

Electrical detailsPower Details

The power shall be supplied by BSES Delhi. The total demand load for the project will be 20,000

kW (23,529 kVA). It is proposed to install 6 Electrical Subs- Stations in basement-2.

D. G. Sets Details

In case of power failure, there will be 12 Nos. of D.G. sets (6×500kVA, 6×400 kVA each). The

location of DG rooms shall be either at the ground or in Basement.

Solid Waste Details

During Construction Phase of the Proposed Building

The solid waste expected to be generated during the construction phase will comprise of

excavated materials, used bags, bricks, concrete, MS rods, tiles, wood etc. The following steps

are proposed to be followed for the management solid waste:

Construction yards are proposed for storage of construction materials.

Page 26


The excavated material such as topsoil and stones will be stacked for reuse during later

stages of construction. Excavated top soil will be stored in temporary constructed soil bank and will be reused

for landscaping during operational phase of the project. Remaining soil shall be utilized for refilling / road work / rising of site level at locations/

selling to outside agency for construction of roads etc. Construction waste management is shown in below figure.

Figure 5: Solid Waste Management for Construction Phase

C & D waste of Existing Buildings

The quantity of construction and demolition waste generation from the site will be

approx. 1, 25,000 m3. The waste generated from the site shall be keep within the

premises. The waste shall be mainly comprising of concrete, RCC, brick work, flooring, finishes,

pavement, doors, windows and ventilators, roofing, electrical, water supply, sanitary

installations, rain water pipe with all fittings and fixtures etc. Waste shall be deposited at collection centre made at the site and will be transported and

disposed to IL&FS C&D Waste Recycling Plant Burari. As inert it shall be used to fill material for low -lying areas, landscaping, Road Making

etc.

Page 27


Finer grade can be molded into blocks and slabs with appropriate binder.


The project will adopt a systematic approach for solid waste collection and disposal. Solid waste

generated from the project will be collected properly and will be managed as per MSW Rules,

2000 amended in 2016.

Waste shall be mainly categories in two classes. 1. Bio degradable Waste 2 Non-

biodegradable Waste. The biodegradable portion dominates the bulk of MSW. This is

mainly due to food and yard waste. These solid wastes will be collected separately by putting three types of separate bins at

the source of generation. For the biodegradable waste yellow bins will be provided, for

the recyclable waste black bins and for the non-recyclable waste red bins will be

provided. It is estimated that maximum solid waste generation would be about 11,340 kg/day;

Following are the solid waste generation rate has been considered as is given table.

Table 14: Calculation of Solid Waste Generation of Proposed Building

Category Counts (heads) Waste Generated (kg/day)Residents 19,095 @ 0.35 kg/day 6,683.25Staff 4,392 @ 0.25 kg/day 1,098Visitors 4,413 @ 0.15 kg/day 661.95Beds 20 @ 1.5 kg/day/bed 30

Landscape waste (13.56 Ac.)

@ 0.2 kg/acre/day 2.71

Total Waste Generated = 8476 kg/dayBio-Medical Waste = 25 % of total waste generated from Health Center = 7.5 kg/day

(Source:http://cpheeo.nic.in/WriteReadData/Cpheeo_SolidWasteManagement/chap3.pdf )

Following arrangements will be made at the site in accordance to Municipal Solid Wastes

(Management and Handling) Rules, 2000 and amended Rules; 2016.

Collection and Segregation of waste

For Domestic Waste

A door to door collection system will be provided for collection of domestic waste in

colored bins from every unit.

Page 28

http://cpheeo.nic.in/WriteReadData/Cpheeo_SolidWasteManagement/chap3.pdf


The local vendors will be hired to provide separate colored bins for dry recyclables and

Bio-Degradable waste. For waste collection, adequate number of colored bins (Green and Blue & dark grey

bins– separate for Bio-degradable and Non Bio-degradable) are proposed to be provided

at the strategic locations of the area. Litter bin will also be provided in open areas like parks etc.

Treatment of Waste

Domestic Waste

Bio degradable Waste

Bio-degradable waste will be subjected to the compost/resultant will be used as manure. STP sludge is proposed to be used for horticultural purposes as manure. Horticultural Waste is proposed to be composted and will be used for gardening purposes.

Recyclable Waste

The cropped grass will be spread on the green area. It will act as manure after

decomposition. Recyclable wastes like paper, plastic, metals etc. will be sold off to recyclables.

Disposal

Recyclable and non-recyclable wastes will be disposed through Govt. approved agency. Hence,

the Municipal Solid Waste Management t will be conducted as per the guidelines of Municipal

Solid Wastes (Management and Handling) Rules, 2000 and amended Rules, 2016. Solid waste

management Scheme is depicted in the following figure.

Page 29


Figure 6: Solid Waste Management Scheme -Domestic Waste

Table 15-composition of Solid waste and its management

S.N

o.

Description Quantity

(kg/day)

Methods of

treatment/Disposal1. Bio degradable Waste 5085.6 Organic Waste Convertor

2. Non-Biodegradable Waste 2542.8 Authorised Recycler

3. Recyclable Waste 847.6 Authorised Recycler

The garbage will be collected and stored in garbage collection room and segregated asBiodegradable waste, Non-Biodegradable waste and Recyclable waste using different colorcoded bins

Bio degradable waste will be treated by OWC and used as a manure for gardening area Recyclable wastes are inert waste which will be disposed through authorized recyclers. The total excavated earth material will be used for refilling in the low lying area.

Technique for disposal of biodegradable waste

Organic Waste ConverterThe Mechanical Composter involves a biomechanical process which decomposes bacteria andproduces odorless pre-organic compost in 15 minutes. The machine occupies small area andprovides a cleaner and better environment.

Working PrincipleMechanical Composter converts the organic waste into odorless, pre-compost manure in 15-20minutes. The organic waste, free from foreign particles is fed into MC. The shredder reduces theorganic waste into the optimum particle size for composting. Then it is mixed with moistureabsorbing materials and Useful microorganisms. This mixture is then blended for a homogeneousmixture and is converted into pre compost manure in 20 minutes. The pre compost manure isthen fed into aerated compost blocks or 12 - 15 days. The compost blocks or piles are speciallydesigned for the pre-compost manure to have proper aeration and suitable environment tomature. The final manure will be rich in nutrients and used for the development of green belt.Salient Features of Organic Waste Converter (OWC)

Quick, easy to operate, less space requirement and odor free manure compared to other

waste conversion process

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Immediate and hygienic disposal of food waste Waste minimization strategy followed by 3R Technique (Reduce, Reuse, Recycle) Savings on Purchase of Manure for landscape Savings on Waste Disposal Expenses Elimination on the usage of chemical fertilizers Carbon credit revenue in the future

Optimum Conditions for CompostingDuring Composting process, optimum conditions shall be maintained to achieve better compost

value. The parameters mentioned below shall be maintained accordingly during operation.

Table 16-Optimum condition for composting

S.No. Parameters Values1. C/N ratio 30 : 12. Particle Size 1/8 to 2 inches3. Oxygen 15 % - 20 %4. Temperature 55 - 65.5 ⁰ C5. Moisture 40 % - 60 %6. pH 6.5 - 7.5

Table 17-Characterstic of Final Compost

S.No. ParametersConcentration (% except pH)

1. Total Nitrogen 1.32. Total Phosphorus 0.2-0.53. Total Potassium 0.54. Organic phosphorus 0.0545. pH 8.66. Moisture 45-507. Organic Matter 30-70

Page 31


Figure 7-Organic Waste Convertor

Benefits of organic waste converter:

Large quantity of solid waste is converted to fertilizer in a very short period This fertilizer can be sold as compost to farmers, or used for gardening Machine requires less space and the efficiency is high Manpower and maintenance is very less This is one of the latest techniques of managing solid waste.

Use of Organic waste converter:A typical Organic Waste Converter - 300 (Dim. 3m × 4m) is used for composting waste125kg/batch or 3000 kg/shift & it require electricity of about 13.5 HP.No. of batches /day = 3000/125 = 24No. of batches to convert 5,085kg =2070.71/125 =40.68~41 batches.Operation Cost-monthly per capita:The operating cost of OWC-300 = 1,80,000 INR/month

Page 32


Cost/day = 1,80,000/30= 6000/- (i.e. 30 batch/day = 3000/-)1 batch/day cost = 3,000/30= 100 INRCost for 41 batch/day = 41 × 100= 4,100/-

Monthly operating cost = 30 × 4,100= 1,23, 000/-Permanent population of the project = 19,312Operating cost of OWC-300 = 51,000INR/monthPer capita cost/month = Monthly operating cost/Total population of the project (i.e. 19,312)= 51,000/19,312= 2.58~3 INR/MonthArea requirement = 40 m2

Landscape Details

Total green area measures 54,895 m2 (28.66 % of Plot Area) A diverse variety of indigenous evergreen and ornamental trees would be planted. As the

project site for construction consists of trees, herbs and shrubs it will require cutting of

trees for construction purpose. approx. 520 trees will be cut and for their compensation

tree plantation will be done at site as well as other lands under CPWD, if required. Total number of trees planted will be approx. 5200-5500. However nos of trees approx.

520 trees will be cut. The plant species will be selected on the basis of Urban Standard Plantation norms and

CPCB guidelines. Landscape Details are given in below table

Table 18- Landscape area details

Particulars DetailsLandscape Area 54,895 m2 (28.66 % of Plot Area)As Per MoEF Guidelines

under section 10 of the DelhiPreservation of Tree Act (DPTA),1994 towards obligation to planttrees

1 tree/ 80 m2 of total area Or

1: 10 (If 1 tree fell, then compensatory plantation of10 trees will be done.

Number Of Trees Proposed To BePlanted

Approx. 5,200-5,500

Area under shrubs 16468.5 m2

Page 33


Area under Greenbelt 38426.5 m2

Table 19- List of trees to be plantedS.No. Botanical Name Local Name

1 Cassia fistula Amaltas2 Delonix regia Gulmohar3 Bauhinia purpurea Koenar4 Bauhinia variegata Kachnar5 Peltophorum ferrugineum Copperpod6 Jacaranda ferrugineum Jacaranda7 Lagerstroe flosreginae Banaba8 Grevillea robusta Silver Oak9 Callistemon lanceolatus Bottle brush10 Anthocephatus cadamba Kadamb

11 Polyalthia longifolia False Ashok

12 Putranjiva roxburghii Putranjiva

13 Sterculia alata Cola nut

14 Melia azadirachta Bainkan

15 Tamarindus indica Imli

Details of Construction MaterialsList of building materials being used at site:

1. Coarse sand2. Fine sand3. Stone aggregate4. Stone for masonry work5. Cement6. Reinforcement steel7. Pipe scaffolding (cup lock system)8. CLC fly ash blocks 9. Crazy (white marble) in grey cement10. P.V.C. conduit

11. MDS, MCBs12. PVC overhead water tanks13. 2 1/2'’ thick red colour paver tiles14. PPR (ISI marked)15. PVC waste water lines16. S.W. sewer line up to main sewer17. PVC rain water down take18. Stainless steel sink in kitchen19. Joinery hardware- ISI marked

20.

21.

22.

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ENVIRONMENT CLEARANCEenvironmentclearance.nic.in/writereaddata/Online/TOR/15... · 2017-12-15 · Redevelopment of GPRA colony Conceptual Plan At Kasturba Nagar, New Delhi ... Defence