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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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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
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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
Table 1: Project Consultants Involved
Project Team Details
Architects/ MEPConsultant
CP Kukreja ArchitectsD-1, Green Park, AshirwadComplex, New Delhi - 110016,Indiacpka@cpkukreja.com
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, IndiaSdghq.cpwd@nic.in
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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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)
Page 8
Figure 1-Project Site and Surroundings within 2 km
Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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
Page 11
Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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
Page 14
Total Water Requirement (3,071 KLD)
Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
Page 15
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
Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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.
During Operational Phase
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
Page 16
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
Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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.
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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
[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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
(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*
Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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.
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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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.
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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
Finer grade can be molded into blocks and slabs with appropriate binder.
During Operational Phase
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.
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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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.
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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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
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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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
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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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
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Redevelopment of GPRA colony Conceptual PlanAt Kasturba Nagar, New Delhi
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.
Page 34
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