1POWER REQUIREMENT - environmentclearance.nic.inenvironmentclearance.nic.in/writereaddata/EIA/021220166Z0QRWTFAnnexure...1POWER REQUIREMENT The power requirement during operation is

1POWER REQUIREMENT

The power requirement during operation is about 2290 KW and it will be sourced from the nearby TNEB grid which will be distributed through the transformers within our premises. For emergency purposes, DG sets of the following capacities will be used.

ÿ 1 Nos. of D.G. sets of 600 KVA and 200 KVA capacity will be provided as power back-up, which is app. 25% of total power requirement.

1.5 BASELINE ENVIRONMENTAL STATUS

Baseline studies are carried out to provide a detailed description of the existing ecosystem, landscape, infrastructure, cultural heritage and urban environment. A baseline study describes the initial state of the environment within the selected boundaries of the study area.

The baseline data has been generated during October 2016 and secondary data collected from various Government and Semi-Government organizations. The details about the existing environmental values are projected based on the volume of the assessment accomplished during the period.

The various environmental attributes were divided into primary and secondary studies. Primary attributes such as air environment, water, soil, noise & biological environment were being assessed by conducting field studies, on-site monitoring. The baseline studies started with site visits and survey in the study area for fixing the monitoring locations for the primary data generation.

1.6 ENVIRONMENTAL COMPONENTS

The baseline environmental studies helped in assessing the existing environmental conditions of the study area and identifying the critical environmental attributes, which were monitored afterwards. This facilitated the comparison of the resultant environmental conditions in the post study scenario with the monitoring day conditions and was helped in preserving the environment without any deterioration and safeguarding the interests of the study area. .

1.7 WATER REQUIREMENTThe total water requirement during operation is 426 KLD. The wastewater generation from the project is estimated to be about 356 KLD, which will be treated in proposed Sewage Treatment Plant and will be recycled for flushing, gardening and the remaining excess sewage will be used for avenue plantation. The water commitment letter also obtained from Thiruporur panchayathu is attached in Annexure-VII. Theestimation of water requirement and the water balance chart is shown in table below.

Table 7.1: Water Requirement and Water Balance – Occupancy Load Calculation

S. No. Project Components Area Details/ Apartments

Description for Occupancy Load

CalculationOccupancy load (Nos.)

1. Residential Units 577Nos(5 person/unit)

2885

2.Visitors- residential & Maintenance Staffs

--10% of the residential

population432

3. Commercial area -- 25

Total Occupancy 3342

Table 7.2: Water Requirement Calculation

Project ComponentsOccupancy

load

Total Water Requirement

(lpd)

Domestic water Requirement

(lpd)

Flushing water Requirement

(lpd)

Residential Units 28853,89,475 2,59,650 1,29,825

135 90 45

Visitors & Maintenance staff

43219440 8640 10800

45 20 25

Commercial area 251125 625 50045 25 20

Total 3342 4,10,040 2,68,915 1,41,125

Water requirement for Gardening purposes based on the Gardening area (4625.55 Sqm (@ 3.5 litres/Sqm)

16189

Total water requirement 4,26,229

Table 7.3: Water Requirement Summary

S. No. Details Quantity

1. Total water required 426

2. Total Fresh Water Requirement 269

3. Fresh water requirement for domestic purposes 269

4. Treated water requirement for Flushing purposes 141

S. No. Details Quantity

5. Treated water requirement for Gardening purposes 16

WATER BALANCE

1.8 SOLID WASTE GENERATION

Treated Water338 KLD

Fresh water269KLD

Total water Requirement426 KLD

215.2 KLD(80 %)

Gardening16 KLD

Sewage Treatment plant 380 KLD

Disposal for Avenue plantation181 KLD

215 +141 KLD = 356 KLD

95 %

185 KLD

Flushing141 KLD

Recycling157 KLD

141 KLD(100 %)

Recycling157 KLD

The solid waste from the proposed development will comprises of biodegradable wastes like domestic food waste, horticultural waste and recyclable waste like plastics, paper etc. As per the manual on municipal solid waste prescribed by Central Public Health and Environmental Engineering Organization (CPHEEO), the quantity of solid waste generated varies between 0.2-0.6 kg / capita / day. Quantity of solid waste generated from the proposed residential building is given below:

Table 8.1: Quantity of solid waste generated from the proposed residential project:

S. No.

Project Components

Occupancy load

Per Capita generation

Total solid Waste

generationKg/day

1. Residential Units

2885 0.65 1875.25

2.

Visitors & Maintenancestaff Residential

432 0.15 64.8

3. Commercial area

25 0.25 6.25

Total Waste Generation in Kg/day

3342 - 1944.3

Per capita waste generation for residential are 0.5 kg / capita / day and for Clubhouse & commercial population it is 0.25 kg/capita/day.

Source: Central Public Health and Environmental Engineering Organization (CPHEEO)

S. No.

DescriptionQuantity

(Tons/day)Mode of treatment / disposal

1Compostable (@60% of waste generated)

1166.58Will be treated in Organic Waste Converter and used as manure for gardening.

2Recyclable (@ 30% of waste generated)

777.72Sent to authorized recyclers or local bodies for recycling

1.9

SUMMARYTable 8.2: Summary of Quantity of solid waste generated

Wastes generated from the households will be segregated into Bio degradable waste and non- bio degradable waste in the source itself (by the occupants) in separate bins. The wastes from such bins are collected separately on daily basis and taken to a separate centralized collection facility by the agency dealing in collection and disposal of garbage. The Bio degradable waste will be treated in an organic waste converter and used as manure for gardening whereas non bio degradable waste will be handed over to authorized recyclers or local bodies for disposal.

2.0 ENVIRONMENTAL IMPACT ASSESSEMENT

2.1 INTRODUCTION

This chapter presents the assessment of various impacts due to the proposed construction project in the study area. Generally, the environmental impacts can be categorized as either primary or secondary. Primary impacts are those, which are attributed directly by the project and secondary impacts are those, which are indirectly induced and typically include the changed patterns of social and economic activities

3 STP Sludge 0.015Will be recycled and reused as manure

by the proposed project. The Proposed construction project would create impact on the environment in two distinct phases:

ÿ Impacts during the construction phase

ÿ Impacts during the operation phase

The construction and operational phase of the proposed construction project comprises of various activities each of which will have impact on some or other environmental parameters. Various impacts during the construction or operational phase and the environmental parameters have been studied to estimate the impacts on environment. The identification and details on impact of the project activity on each of the above environmental attributes are discussed below.

2.2 IDENTIFICATION OF IMPACTS

Construction of residential development project is for the benefit of general population, however, like any other projects, it also has impacts on existing Environmental settings and if not properly evaluated and controlled, it may lead to imbalances. These could be reversible, irreversible, temporary or permanent.

The identification of impacts is important as it leads to the other elements such as quantification and evaluation of impacts. Although a number of non-projects related impacts have been identified while describing the existing (baseline) environmental status, it is necessary at this stage to identify the types of the potential impacts which might be caused by the proposed development. Many techniques are available for identification of impacts. In case of this project, the "Matrix Method" was adopted, which involves an

understanding of the cause-condition-effect relationship between an activity and environmental parameters. It is very useful as gross screening tool for impact identification method. This method has been basically advantageous in recognizing the series of impacts that could follow from the proposed activities. The idea was to account for the project activity and identify the types of impacts that could initially occur. This process was repeated until all possible types of impacts were identified. With this method the potential impact of the proposed project has been identified.

2.3 IMPACT EVALUATION

Impact evaluation assesses the expected changes in the environment due to the proposed project. It is the tool for identifying the magnitude of impact and forms basis for the development of Environmental Management Plan. Weight age for each impact is given below. Evaluation of impacts considering both positive and negative effects on air, noise, land, water and socioeconomic environment during the construction and operation phase of the project is given in Table 11 respectively.

TABLE 9: EVALUATION OF CONSTRUCTION PHASE IMPACT

Environmental

Parameter

Project Activities

Impact Type

Sig

nifi

cant

Non

Sig

nifi

cant

Dir

ect

Indi

rect

Sho

rt T

erm

Lon

g T

erm

Una

void

abl

e Irre

vers

ible

Mit

igat

ion

Req

uire

d Weightage

CONSTRUCTION PHASE

AIR ENVIRON

MENT

Site Clearance & Leveling

Negative √ √ √ √ √ -4

Site excavation Negative √ √ √ √ √ -4

Foundation (Shallow Foundation)

Negative √ √ √ √ 0

Material Storage & Handling

Negative √ √ √ √ √ -4

Generation and disposal of construction waste

Negative √ √ √ -4

Vehicular Movement


Labour’s Camp

No Impact

-

Public Health & Safety

No Impact

-

Economic Activity

No Impact

-

NOISE ENVIRON

MENT


Negative √ √ √ 0

Site excavation Negative √ √ √ -4


Negative √ √ √ √ -4


Negative √ √ -1


No Impact

-

Vehicular Movement


Labour’s Camp

No Impact

-


No Impact

-

Economic Activity

No Impact

-

LAND ENVIRON

MENT


No Impact

-

Site excavation No Impact

-


Negative √ √ -1




Negative √ √ -4

Vehicular Movement


Labour’s Camp

No Impact

-


No Impact

-

Economic Activity

No Impact

-

WATER ENVIRON

MENT



Site excavation No Impact

-


No Impact

-





Vehicular Movement

Negative √ √ 0

Labour’s Camp



No Impact

-

Economic Activity

No Impact

-

SOCIO

ECONOMIC

ENVIRONMENT



Site excavation Negative √ √ √ √ -2




Negative √ √ √ 0



Vehicular Movement


Labour’s Camp



Positive √ √ √ 6

Economic Activity


TABLE 10: EVALUATION OF OPERATION PHASE IMPACT

Environmental

Parameter

Project Activities

Impact Type

Sign

ific

ant

Non

Sign

ific

ant

Dir

ect

Indi

rect

Shor

t Ter

m

Lon

g T

erm

Una

void

able

Irre

vers

ible

Mit

igat

ion

Req

uire

d Weightage

OPERATION PHASE

AIR ENVIRONMENT

Occupancy No Impact

-

Operation of DG Sets

Negative

√ √ √ √ -8

Sewage Generation & Discharge

Negative

√ √ 0

Rainwater Harvesting

No Impact

-

Solid waste Generation

Negative

√ √ √ -6

Gardening & Landscaping


NOISE ENVIRONMENT

Occupancy No Impact

-


Negative

√ √ √ √ -8


No Impact

--


No Impact

-


No Impact

-



LAND ENVIRONMENT

Occupancy Negative

√ √ 0


Negative

√ √ √ 0


Negative

√ √ √ √ -8




Negative

√ √ √ √ -8



WATER ENVIRONMENT

Occupancy Negative

√ √ √ √ -8


Negative

√ √ √ √ -6


Negative

√ √ √ √ √ -8




Negative

√ √ 0



SOCIO ECONOM

IC ENVIRONMENT

Occupancy Positive √ √ √ 10


Negative

√ √ √ √ -6


Negative

√ √ √ √ -6




Negative

√ √ √ -6



2.4 IMPACT ON AIR ENVIRONMENT

2.4.1 Construction Phase

Impacts of construction activities on air quality are cause for concern mainly in the dry months due to dust particles. The main sources of emission during the construction period are the movement of equipment at site and dust emitted during the leveling, grading, earthworks, and other construction related activities. The dust emitted during the above mentioned activities depend upon the type of soil being

excavated. However, the impact will be for short duration and confined locally to the construction site. The composition of dust in this kind of operation is, however, mostly inorganic and non-toxic in nature.

The impact of such activities would be temporary and restricted to the construction phase. The impact will be confined within the project boundary and is expected to be negligible outside the plant boundaries. Proper upkeep and maintenance of vehicles, sprinkling of water on roads and construction site are some of the measures that would greatly reduce the impacts during the construction phase. Thus, it is inferred that no significant impacts are expected on the overall ambient air quality due to the proposed construction activities.

Transportation and Storage of Construction Materials

Transportation of heavy machinery and building materials implies heavy traffic on the roads leading to the site with possible negative impacts to the surrounding area (dust, spillage, emissions and noise). Transportation of construction materials as well as improper storage of building materials, especially gravel, sand and cement in the construction site will lead to inadvertent dispersal of materials during heavy rain or high wind during dry periods. Measures will be adopted for proper handling of construction materials to reduce the negative impact.

2.4.2 Operation Phase

The existing atmospheric air quality in the proposed project site and its surroundings are well studied and values of the pollutants SPM, RPM, NOx and SO2 are within the limits prescribed by the central pollution control board.

There is no major pollutant envisaged from the proposed development. It is likely that the air quality may be affected slightly due to the emissions from the vehicular movement. The emission from DG sets will be very negligible since it will be used only during power cut in the necessary area. However in the case of DG sets the stack will be properly designed to meet the stipulations of CPCB. These emissions will be insignificant and the environmental pollutant levels will be maintained within the prescribed limits. Hence there shall not be any adverse impact on the air environment around the proposed residential development project.

2.5 IMPACT ON AMBIENT NOISE


During the construction noise levels will increase due to use of machinery and heavy vehicles in the project area. In terms of noise emission; demolition, excavation and construction work can be divided into two phases, namely (1) Demolition and Earthworks and (2) building works. Loading and unloading of construction materials, fabrication, handling of equipment and material, operation of power shovels etc. will be the major source of noise during the construction phase. Various construction activities will cause short-term noise impact in the immediate vicinity of the project site.

The areas affected are those close to the site and hence the impacts are localized. At the peak of the construction, marginal increase in noise levels is expected to occur. The peak noise levels from continuous construction activity may be as high as 80 - 90 dB (A). The noise control measures during construction phase shall restrict the noise levels to lower levels. Hence the overall impact on the ambient noise levels will not be significant.


There will not be any major impact from noise. This is because no equipment or other infrastructure facility in the project generates noise more than 50-60 dB (A). However, the only noise generation source is the DG set. The promoters have decided to adopt adequate steps to maintain the noise levels within the prescribed limits. For the same all the DG facility will be sound insulated and acoustic proofing will be done in the places where these DG sets are installed. Apart from this honking will be prohibited at the site and speed limits will be restricted within the site. This will significantly help in controlling noise levels at the site. Further the green belt provided within the site will act as noise barrier between inside and outside environment. This will act as buffer and protects the site from high noise levels outside the site.

Traffic Noise

Traffic would be induced during both construction and operation phase of the project. Vehicles associated with construction would generate intermittent noise throughout the vicinity of the proposed action. In the operation phase, vehicular parking is being provided in stilt floor of the blocks where noise levels are expected to increase substantially during the peak hours due to starting, idling and roaring of vehicles.

2.6 IMPACT ON LAND ENVIRONMENT

No blasting is envisaged during construction phase of the project. The rehabilitation and resettlement issues are not involved in the project. Furthermore the existing environmental conditions of the project site reveal that the land is not contaminated or polluted.

Top soil will be excavated upto 15 cm from the project site. It will be stored in covered area during construction phase and will be used for landscaping in operation phase within project site. Also the impact due to exploitation of ground water is insignificant in the site due to the sourcing of water from other sources during the operation phases. Hence there will not be any adverse impact on the surrounding land use during the construction period as well as during the operation phase.

2.7 IMPACT ON WATER RESOURCES


The required water quantity for construction will be utilized from outside tankers brought in the project area. Impact on water quality during construction phase may be due to non-point discharges of sewage generated from the construction work force, stationed at the site. Construction activities for the

proposed development can have minor impact on hydrology and ground water quality of the area if the construction waste leaches into ground.

Potential sources of impacts on the hydrology and ground water quality during the construction phase would be soil runoff, improper disposal of construction debris, spillage of oil and grease from the vehicles and wastewater stream generated from on site activities such as vehicles washing, workshop etc. Precautions and preventive measure will be taken at the site during construction to avoid any ground and surface water contamination hence the overall impact on water environment during construction phase due to proposed project is likely to be insignificant.


The proposed project requires 426 KLD of fresh water to meet from local body water. The total quantity of wastewater generation is likely to be 356 KLD. No impact from wastewater, this is because the sewage generated will be treated and recycled within the project site for flushing, gardening and the remaining excess sewage will be used for avenue plantation. Therefore, surface and subsurface contamination due to treated wastewater will not be envisaged.

2.8 IMPACTS DUE TO WASTE DISPOSAL

2.8.1 Stacking and Disposal of Construction Materials

Stacking of construction materials will be confined to the project site only and also temporary sheds will be provided to store the materials, hence no impacts on surrounding area will be envisaged. Solid wastes generated due to proposed project during construction phase include sand, gravel, stone, bricks, plastic, paper, wood, metal and glass. During the construction, wastes would be generated at the rate of 5-10 kg/Sqm. Recyclables will be sent to authorize recyclers. Hence there is no significant impact due to waste disposal during the construction phase.


The solid waste generated from the project will be collected daily and moved to a common temporary storage facility by the person dedicated for waste collection. The collected Solid waste will be disposed treated in an organic waste converter and later used as manure for gardening.

2.9 IMPACTS ON ECOLOGICAL RESOURCES


The impact of construction activities will be primarily confined to the project site. The project site is a vacant land and devoid of any vegetation. Thus the site development work will not lead to any significant loss of any important plant species. Deposition of fugitive dust on leaves of nearby vegetation may lead to temporary reduction of photosynthesis. Such impacts will, however, be confined mostly to the initial

period of construction phase. Hence the proposed development will not lead to habitat destruction, fragmentation or vegetation damage.


No wastewater will be discharged into the surface water stream. Hence, there will not be any impact on the aquatic ecology. Also the proposed project is to be located in an earmarked residential zone, which does not have any natural park or sanctuary or forest area in the immediate vicinity. The flora and fauna pattern in the area will not be disturbed due to the project. Hence the overall impact on ecological resources due to proposed project is likely to be insignificant. Moreover the entire project area would be landscaped with variety of plants.

2.10 IMPACT ON TRAFFIC LEVELS


The movement of construction equipments will be mostly within the site during the project. Vehicles bringing in raw materials like sand, cement and aggregate materials will be moving into the site from outside, which will be strictly controlled and monitored as per the traffic rules, to avoid any sort of disturbance to the traffic and safety of the surrounding areas. Hence the impact due to the vehicularmovement during the construction phase would be minor or insignificant.


Based on the vehicular density observed during the traffic survey conducted on the main roads around the proposed site, the existing infrastructure is capable of taking up additional traffic loads. Also the project is to be executed phase wise; the increase in traffic will be easily handled by the existing as well as the future improvements in the transportation infrastructure. Hence there will not be any impact on the traffic pattern and density.

2.11 IMPACTS ON SOCIO ECONOMIC ENVIRONMENT

The required land for the development is owned by Casa Grande Homes Pvt Ltd. The proposed residential development project will be open to members of all communities and castes. The above measure will encourage mixing of different caste people for their respective festivals and occasions. This will improve the social welfare and brotherhood among the various communities and castes.

Also the state of the art facilities proposed in the development is planned to cater the needs of the occupants which would be able to provide healthy working atmosphere. Hence it is obvious to assume that the activities of the proposed development will produce some positive impacts in the socio-economic status of the area.

2.11.1 Public Health and Safety

As the project is only a construction of residential complex and all the construction activities are confined to the project site, no health related impact would be envisaged within the project area. The people engaged in the construction activities will be directly exposed to dust generation, which is likely to cause health related impact. Appropriate mitigation measures like spraying of water will be adopted to minimize dust emission in the construction site. Laborers will be provided with suitable Personal Protective Equipment (PPE) as required under the health and safety norms. Regular health checkups will be organized.

2.11.2 Positive Impact

The project will facilitate maximum participation of the local work force for construction process; this will benefit the local economy, improvement in economic activity and enhancement in earning opportunities for the local population. The operation of the project and other allied facilities will improve the employment opportunities. The project will provide direct and indirect employment. About 100 – 150 persons will be employed during the operation stage for the purpose of day-to-day maintenance works. The employment will have positive impact on the local economy thereby increasing the quality of life. The proposed rainwater recharge facility will augment the ground water level in the project area. The proposed project will also improve the aesthetics of the area due to the development of modern buildings.

3.0 ENVIRONMENTAL MANAGEMENT PLAN

3.1 GENERAL

Environmental Management Plan (EMP) is aimed at mitigating the possible adverse impacts of the project and for ensuring to maintain the environmental quality. The environmental management plan consists of the set of mitigation, management, monitoring and institutional measures to be taken to eliminate the adverse environmental impacts or reduce them to acceptable levels.

3.2 AIR POLLUTION CONTROL AND MANAGEMENT


The impacts will be due to the air emissions like particulate matter (PM10 & PM2.5), CO, NOx and SO2

due to material handling, vehicular movements and other site activities. The particulate matters will be reduced by frequent sprinkling water on the road surfaces and on other areas where dust is arising due to material handling. All the equipments and vehicles used in the construction and transportation of materials will be maintained properly and only low sulphur diesel will be used as fuel for DG sets and construction equipment and vehicles.

The emissions from the DG sets will be let out only through the stacks with adequate heights as per CPCB norms. This will avoid the deposition of the particulate matters and other pollutants by facilitating the through dispersion of pollutants into the atmosphere. The stacking of all the construction materials will be confined only within the proposed site. Vehicles carrying the raw material and debris will be covered to minimize dust emissions while travelling. Adequate parking space will be provided for construction vehicle and machinery to prevent idling and thus will help in minimizing the emissions. Wheel wash facility will be provided at the exit point of the site.


Air emissions are observed during the operation phase of the project. The air emissions will be reduced by ensuring smoother flow of traffic within the premises by better traffic management plans. It is proposed to have trees all through the boundaries of the site and along the either side of the internal roads. This will reduce the particulate matters from being transported to the nearby areas. The air emissions from the Diesel Generators will be controlled by using low sulphur content high speed diesels, periodic maintenance of DG sets as per the defined schedule of manufacturer and by providing adequate stack heights as prescribed by CPCB. The stack height for the DG sets are calculated based on the CPCB guidelines as shown below;

ÿ The proposed project to have 1 Nos. of D.G. sets of 600 KVA capacity each and 1 No. of D.G. Set of 200 KVA capacity as power back-up, which is app. 25% of total power requirement.

Air Pollution Control (APC) Measures

The main source of air emissions from the proposed residential development is the Generator Sets the above proposed generator sets will be used only during TNEB power failure. To control the air emissions from these D.G sets, adequate stack height is provided to release the exhaust flue gases into the atmosphere at a height at which efficient dispersion takes place. Since the DG sets are operated only during power failure, the emission is not continuous and hence the impact due to these emissions is insignificant.

The stack height for the DG sets are calculated based on the CPCB guidelines as shown below;

Stack Height Design Calculation for 250 KVA Generator Set

H = h + (0.2) (kVA) 0.5

= 27+(0.2)x600 0.5

= 32 m =

Where, H = Total height of stack in meters from ground levelh = height of the building in meters

The stack height required as per CPCB norms is 32 m. The same will be provided for all 2 nos. of DG sets.

Stack Height Design Calculation for 320 KVA Generator Set

H =h + (0.2) (kVA) 0.5

= 27+(0.2) 200 0.5

= 29.82 m

Where, H =Total height of stack in meters from ground levelh =height of the building in meters

The stack height required as per CPCB norms is 32 m. The same will be provided.

3.3 NOISE CONTROL AND MANAGEMENT

3.3.1 Construction PhaseThe noise generated from the construction equipments will be reduced through proper maintenance of all the equipments which are involved in construction activities, confining the construction activities only during the day time and providing barricades all around the project area. The adverse impacts of noise especially on workers will be reduced by providing ear muffs to the workers in high noise zones. Noise control systems such as equipment foundation pads, dampeners, silencers and acoustic enclosures will be used for individual units as per the requirement to minimize the noise & vibration.

3.3.2 Operation PhaseThe increase in the ambient noise levels due to the vehicle transportation will be controlled by the development of the green cover all along the internal roads and by implementing better traffic management plans inside the site premises. The better traffic management plans will significantly reduce the noise generated due to the congestion caused by the movement of vehicles.

The generator noise is controlled by providing acoustic enclosures. Proper air ventilation system is designed to allow the maximum aspiration and cooling airflow required so that the engines do not overheat. Axial flow fan of required size & numbers provided for proper air ventilation. Acoustic louvers, splitter & insulated ducts are provided to suppress the noise where required.

3.4 SOLID WASTE MANAGEMENT

3.4.1 Construction PhaseSeparate raw material handling yard will be demarcated. This will prevent the contamination of the soil due to the spillage of the construction materials. Cement will be separately stored under cover in bales. The raw material handling yard will be located within the project site and separated by enclosures/barricades. This will keep the working area clean and reduce the soil contamination.


During the operation phase the used oil from the DG sets will be collected in separate drums and handed over to the authorized recyclers by TNPCB. Hazardous Waste: During the operation phase the used oil, DG filters, oil mixed cotton waste and oil containers from the DG sets will be collected in separate place.Table 11: Generation and disposal of Hazardous waste Quantity per annum

S. NoWaste

categoryDescription of

waste

Quantity in Tonnes/per

annum

Activity/Activities for which authorization is required

Collection & Storage

Transport & Disposal

1 35.1DG Filters & filter material

0.5MS drums within

the premisesDisposal through TSDF

facility

2 5.1 Used oil0.4 MS drums within

the premisesDisposed to authorized re -processors

Non- Hazardous Waste:

It is estimated that the municipal solid wastes will be generated in the following passion:

Biodegradable wastes : 1.17 Kg/dayNon-biodegradable wastes : 0.77 Kg/day

In the Residential Housing development, Wastes generated from the households will be segregated into Bio degradable waste and non- bio degradable waste in the source itself (by the occupants) in separate bins. The wastes from such bins are collected separately on daily basis and taken to a separate centralized collection facility by the agency dealing in collection and disposal of garbage. Appropriate site will be identified for keeping the biodegradable and Non biodegradable waste. All the collection bins shall be properly maintained and cleared on regular basis. The Bio degradable wastes & inert fractions will be treated in organic waste converter and will be used as manure and non bio degradable recyclable waste will be handed over to authorized recyclers.

Horticulture wastes leaves, grass and vegetative residues shall be collected at the secured location such that it will not hinder daily activity schedule or washed away by the surface run-off causing choking of drains, etc. and will be separately treated and disposed off along with biodegradable waste.STP sludge will be stabilized, and dewatered for separation of solids, which will be used as manure in horticulture.

Figure 3: Solid waste disposal

Solid waste

Source Separation

Biodegradable Waste

Collection point

Local Municipality

Collection point

Non Biodegradable Waste

Sent to authorized recyclers

3.5 WATER AND WASTEWATER MANAGEMENT


The wastewater generated by the construction workers will be treated and disposed through septic tank with soak pit arrangement. All the water storage tanks/containers will be maintained without any leaks. Necessary precaution and preventive measures will be taken at the site during construction to avoid any groundwater and surface water contamination.


It is proposed to use the recycled water for the part of the daily water demand in the premises. The total water requirement during operation is 426 KLD and total fresh water required during operation is 269 KLD. The wastewater generation from the project is estimated to be about 356 KLD, which will be treated in proposed Sewage Treatment Plant of 380KLD capacity. Treated sewage will be reused for flushing and gardening and the remaining excess treated water will be used for avenue plantation. Thesewage treatment Design is described in the Annexure - V.

3.6 STORM WATER MANAGEMENT


The surface runoff during the construction period will be directed into the drains separately provided for this purpose.

3.6.2 Operation PhaseRain water from internal roads etc will be discharged through storm water drain sloping towards rain water collection sumps. An overflow pumping main pipe will be laid as lead pipe from rainwater harvesting trench up to the road for draining the excess water during rainy seasons.

DESIGN PARAMETERS:

Total Plot Area Considered 30837.04 SqmTotal roads and pavement area 13024.00 Sqm

Total Landscape Area 4625.56 SqmTotal Roof Area 5247 Sqm

Intensity of rainfall considered in Chennai 1100.00 mmCo – efficient of runoff considered for roof area : 0. 90Co – efficient of runoff considered for road/paved area : 0. 75Co – efficient of runoff considered for landscape area : 0. 1

Hence, the total quantity of rainfall will be: q= a x p x rq = quantity of rainwater run - off in cu.m / hr.a = area of catchments drained in Sq.mp = permeability factor r = rainfall intensity in m / yr.

Table 12: Run –off Calculations

DescriptionArea in

Sqmcoefficient

runoffRainfall intensity

in mTotal RainwaterRunoff Cum/hr

Road area 13024.00 0.75 0.06 586.05

Landscape area 4625.56 0.1 0.06 27.75

Roof area 5247 0.9 0.06 283.33

Total Run-off/hr 897.13

Taking Retention of 15 min, run-off load is 224

Size of RWH Pit (diameter- 1.2m , depth 4 m) 6

No. of Pits Required 37

No. of pits Provided 37

Note: Runoff generated from (STP, Solid Waste Disposal and Other Utilities) Area will not be directed into drains due to contamination of water.

Hence, total volume of rainwater run - off will be: (a) + (b) + (c) = 388 Cu. m /hr.

∑ Runoff during peak rainfall (is estimated to be 1290 cum per hour. Storm water drainage system is designed accordingly.

∑ The runoff from rooftop will be diverted to the rain water collection trench. ∑ During abnormal rains, the excess runoff after storage and recharge will be disposed off through the

external storm water drains.

Details of recharge pit arrived based on soil conditions is briefed below

3.6.3 Recharge through Pits : 37 nos.

Recharge pits are normally excavated as any shape, which are sufficiently deep to penetrate the low-permeability layers overlying the permeable layer.

A portion of rain water falling over the roofs, road and paved area and the open area will be used for

recharging the ground water. The dimension of pits is 1200 mm diameter and 11 mm depth. Recharge pits

are normally excavated as any shape, which are sufficiently deep to penetrate the low-permeability layers

overlying the permeable layer. They are similar to recharge basins in principle, with the only difference

being that they are deeper and have restricted bottom area. In many such structures, the infiltration occurs

vertically through the permeable layer is much higher than the low permeable layer occurring in the top.

Figure 5: Cross section of recharge pit

The pits will be filled with gravels (1-10mm) at bottom, coarse sand (1.1-2mm) at middle and fine sand at

the top in graded form. Gravels at the bottom, coarse sand in between and fine sand at the top so that the

silt content that will come with runoff will be deposited on the top of the fine sand layer and can be easily

be removed. The top sand layer of the recharge pits will be periodically cleaned to ensure the proper

recharge.

3.6.4 RECHARGE TRENCHES

Recharge trenches are normally excavated as linear pits, which are sufficiently deep to penetrate the low-

permeability layers overlying the permeable layer. They are similar to recharge basins in principle, with

the only difference being that they are deeper and have restricted bottom area. In many such structures,

the infiltration occurs vertically through the permeable layer is much higher than the low permeable layer

occurring in the top. Recharge Trench will be constructed in the premises across the slopes.

Details of Recharge Trenches: Trench maintained all along the boundary, the depth of the trenches will

be around 1.50 m. It is planned to remove the entire impervious layer to facilitate rain water recharge. The

width of the proposed trenches is 1.0 m. Pebbles of different size will be provided in an ascending order

in the tank and a layer of sand will be provided on top of the filter media. The rain water flowing through

the open land, paved area and green belt area will be used for recharging to ground water through the

above said trenches.

3.6.5 Rain Water Storage Sump:

Rain water storage sumps of 120 cum, 75 cum, 80 cum and 2 nos. of 100 cum capacities are proposed for

rainwater storage and reuse.

Flood Occurrence:

The highest recorded monthly rainfall in that area and surroundings of Chennai is 521 mm in 2008,

considering the previous 5 years day peak rainfall (Refer Table below from IMD). The storm water

management has been done, the total peak flow at the site by taking 100 mm of highest average

rainfall/day in site, the runoff will be 1290 cubic meter/hr after development, the recharge pit, storm water

collection sump and storm water collection drain have been designed in the site to the manage the rain

water during heavy rainfall time.

INDIA METEOROLOGICAL DEPARTMENTDISTRICT RAINFALL (MM.) FOR LAST FIVE YEARS

Note : (1) The District Rainfall(mm.)(R/F) shown below are the arithmatic averages of Rainfall of Stations under the District.

Table 13: Chennai District Rainfall data

YearRainfall (mm)

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

2008 63.1 11.2 114.2 11.7 0.1 65.1 23 100.5 97.1 378 521.1 6.8

2009 13.1 0.0 0.7 0.0 14.0 11.3 41.8 93.9 73.6 46.5 493.8 259.5

2010 4.7 0.1 0.0 0.0 191.1 120.2 146.0 195.1 107.5 165.6 224.2 263.7

2011 11.8 41.8 0.0 19.4 10.0 118.0 85.6 330.5 235.5 241.1 447.3 147.5

2012 17 0.0 0.5 0.0 0.0 21.2 67.3 94.5 164 394.3 39.2 134.4

Source: Consolidated Report for Indian Meteorological Department

3.7 LANDSCAPE AND ECOLOGICAL MANAGEMENT


It is proposed to plant plantation on landscape area and all through the boundaries of the site and along

either side of the internal roads. This will have positive impact over the fauna of the locality.


It is proposed to have a landscape area of around 4625.56 Sqm. It is also proposed to plant only the native

species of plantations. In addition to augmenting present vegetation, it will also check soil erosion, make

the ecosystem more diversified and functionally more stable, make the climate more conducive and

restore balance. The following species are proposed for the plantations in the site. Adequate numbers of

these species will be planted in the Landscape and along the boundaries of the site and along either sides

of the internal roads.

Table 14: List of Trees to be planted

Scientific Name Common Name Important Features Trees Proposed for border side plantation

Albizia lebbeck Vakai Shady tree, yellowish green fragrant flowers

Azadiracta indica Neem Large tree, good for roadside plantation

Ailanthus excelsa Agal Large tree, good for roadside plantation

Ficus retusa Indian Laurel Shady tree, good for roadside plantation

Alstonia scholaris Elilaipalai Shady Tree, white fragrant flowers

Pongamia pinnata Pungam Shady tree.

Saraca asoka Sita Ashok Shady tree, yellowish green fragrant flowers

Anthocephallus cadamba Vellai Kadambu Shady, large tree, ball shaped flowers.

Trees Proposed for beautification in garden / building premises

Cassia fistula Golden shower tree

Medium sized deciduous tree.Beautiful yellow flowers, Butterfly host plant

Mimusops elengi Spanish cherry Shady tree, small white fragrant flowers

Nyctanthes arbor-tristis Parijatak, Small deciduous fast growing tree, beautiful flowers.

Murraya paniculata Vengarai

Small tree, Fragrant white flowers,Butterfly host plant

Bombax ceiba Silk Cotton Tree

Large deciduous tree. Flowers attract many birds.

3.8 SOCIO ECONOMIC DEVELOPMENT PLAN


ÿ Only locally available workforce will be used for the construction purpose. This will result in the improved economic condition of the people of that area, at least during the construction period.

ÿ Medical checkups will be done at regular intervals to all the employees working. Trained first aid personnel will be made available round the clock throughout the construction phase.

ÿ The safety procedures will be made available with the respective shift in charges and the same will be pasted in the workplaces.

ÿ All the employees involved in the construction activities will be provided with the necessary Personal Protective Equipments (PPE) and instated to use it.

ÿ Occupational health and safety orientation training will be given to all employees consisting of basic hazard awareness, site-specific hazards, safe working practices, and emergency procedures

ÿ Monthly safety assessment meetings will be conducted to identify potential safety issues (e.g., site access, construction, work practices, security, transportation of heavy equipment, traffic management, emergency procedures and fire control and management) and measures to mitigate them.


The people of the locality, especially women, may be employed in the households as service providers/maintenance staffs. This will improve the circulation of money in the study area. The project also stimulates the auxiliary developments around the project area. This will result in the development of necessary infrastructure and amenities at least around the project site.

3.9 ENERGY CONSERVATION

Energy conservation will be one of the focuses during the project planning and operation stages. 3.9.1 Energy Saving Practices

ÿ Use of Energy Efficient low loss – electrical ballast.ÿ Use of capacitor banks power factor improvement of EB powerÿ Use of low loss transformers (Copper Wound type)ÿ Use of solar lighting at major junction of the roads and common corridor lighting including stilt

floor parking lights.ÿ Solar water heater for hot water requirement

Energy Conservation Measures

Building Construction Data

In accordance with Energy Conservation Building (ECBC) Code 2007 norms, Chennai comes under warm & humid climate zone. Hence, based on the ECBC norms, U Values considered are as follows:

Roofs & Opaque WallsRoofs and opaque walls shall comply with either the maximum assembly U-factor or the minimum insulation R-value. R-value is for the insulation alone and does not include building materials or air films. The roof insulation shall not be located on a suspended ceiling with removable ceiling panels.

Table 15: Energy Conservation Building Code (ECBC) : U-values of the roof and opaque wall of the building

The U-values of the roof and opaque wall of the building will meet the requirements as specified in the Energy Conservation Building Code (ECBC)

ECBC Clause:(Reference)

ComponentPermissible U-Value

as perECBC (W/m2°C)

Resultant Value due to the proposed configuration

(W/m2°C)

4.3.1 Roof U-0.261 R-3.54.3.3 Wall U-0.44 R-2.1

Vertical Fenestration

Vertical fenestration shall comply with the maximum area weighted U-factor and maximum area

weighted SHGC requirement. Vertical fenestration area is limited to a maximum of 60% of the gross wall area for the prescriptive requirement.

Table 16: Vertical Fenestration

DescriptionWWR=40% 40% <WWR<=60%

Maximum U-factor

Maximum SHGC

Maximum SHGC

Glass 3.3 0.25 0.20

Plumbing & Fire Fighting

a. Pumps & equipment selected on “best” energy efficiency point.

Source :The energy consumption analysis and data sheets given below are as per the Energy Conservation

Building Codes 2007 / Bureau of Energy Efficiency.

3.10 Soil EnvironmentThe soil topography is based on classification of soil samples recovered from the boring, and our observations during drilling operations. A generalized summary of the major soil strata is as follows;

Stratum I is 0.0 to 0.70 m with yellows grey clayey sand, Stratum II is 0.70 to 2.20 m with light yellowclayey sand stilly fine sand with medium fine sand particle, Stratum III is 2.20 to 3.0m with light brownish dirty fine sands with shells and stratum IV is 3.0 to 4.40 m with grayish dirty fine sand with medium fine particles and shell. Details are enclosed in the Geotechnical Soil report attached asAnnexure – VI

3.11 FIRE PROTECTION MEASURES

Fire Extinguishers

The Portable fire extinguishers of various types are provided near lift lobby in each floor, pump room, transformer room, DG room and lift machine room etc for fighting light hazard fire. All the extinguishers used in the project area would be with BIS mark and are located at an easily accessible position without obstructing the normal passage.

3.12 RISK ASSESSMENT, DISASTER MANAGEMENT AND SAFETY MEASURES

A well - defined Risk Management Plan is made as follows:

STEP 1: Define the Projects/Tasks

v Site Clearing v Excavation v Raft v RCC slab v Block work / plastering v External plastering v Joinery - frame fixing v Flooring v Interior works v Windows fixing v Flooring v False ceiling v Painting

v Services I.Electrical

II.Plumbing III.Fire fighting

v Equipments

i. Elevator ii. STP /WTP

iii. Hard and landscape

STEP 2: Identify the Hazards

a) Are you using (Tick boxes)

[ ÷ ] plant/equipment

[ ÷ ] portable electrical equipment [ x ] pressure vessels/boilers [ x ] hazardous substances

[ ÷ ] scaffolding

[ ÷ ] ladders

[ ÷ ] lifts/hoists/cranes/dogging/rigging/load

shifting machinery

b) Does the project/task involve (Tick boxes)

[ ÷ ] using tools/equipment with

moving part(s)

[ ÷ ] using tools/equipment that

vibrate[ x ] working with x-rays ,or lasers

[ ÷ ] electrical wiring

[ x ] asbestos removal

[ ÷ ] welding

[ x ] hazardous waste

[ ÷ ] excavation / trenches (>1.5m)

[ ÷ ] working around electrical installations

[ ÷ ] working near traffic

[ ÷ ] working at a height (>3m)

[ ÷ ] working in isolation

[÷] working in a confined space

[ ÷ ] manual handling

[ ÷ ] repetitive or awkward movements[ x ] lifting or moving awkward or heavy objects

c) Is there (Tick boxes)

[ ÷ ] noise

[÷ ] dust/fumes/vapours/gases

[ x ] extreme temperatures[ x ] risk of fire/explosion

[ ÷ ] slippery surfaces/trip hazards

[ x ] poor ventilation/air quality[ x ] a poorly designed work area for the project/task

STEP 3: Assess the Risk

During Construction Phase:

Table 22: Risk assessment During Construction Phase

ActivitiesAir

PollutionWater

PollutionNoise

PollutionSoil

PollutionOccupational

HazardA. Material Handling:Cement +M - - +M +MSteel - - + - +MSand - - - - -Stone - - - - +L

Wood - - - - -Glass - - - - +HHardware - - - - -Colour - +H - +H -B. Construction MachineryRotary Driller +L - +H - +HMixers +M - +M +L +MExcavator +L - +L - +HMaterial Lift - - +L - +H

Risk Factor: + : Positive - : NegativeL : LowM : MediumH : High

For any projects/tasks that present a high or extreme risk, a Safe Work Method Statement must be completed.

STEP 4: Control the Risk

Note how you will control the risk following the priorities listed to the right. This may include controls like redesigning the workplace, using guards or barriers, ventilation, using lifting equipment or personal safety equipment.

∑ Eliminate the Hazard∑ Keep the Hazard and People Apart∑ Change the Work Methods∑ Use Personal Protection

Note any specific risk assessments required for high-risk hazards. Check whether any hazards noted in step 2 require further assessment or action.

[ x ] hazardous substance risk assessment

[÷] test and tag electrical equipment

[ ÷ ] confined spaces risk assessment

[ ÷ ] sound level test

a) Note Permits/Licenses/Registration required[x ] Demolition work

[÷ ] Electrical wiring

[ x ] Pressure vessels

[ x ] Friable asbestos removal[ x ] Ionizing radiation sources

[ ÷ ] registers for chemicals, Personal

protective Equipment, training,

ladders, lifting gear

b) Note certificates of competency/licenses for operators

[ ÷ ] Scaffolding

[ ÷ ] Rigging

[ ÷ ] Load shifting machinery operation

[ ÷ ] Pesticide application

[ ÷ ] Crane operation

[ ÷ ] Hoist operation

c) Note emergency systems required

[ ÷ ] first aid kit

[ ÷ ] extended first aid kit

[ ÷ ] emergency stop button

[ ÷ ] additional emergency procedures

[ ÷ ] Fire control

[ ÷ ] remote communication mechanism

[ x ] others

STEP 5: Actions Required to Control the RiskA. During construction to reduce pollution:

∑ Manual water sprinkling during dust excavation∑ Using RMC to reduce air pollution∑ Dust cover for Trucks∑ New Construction Machinery∑ Equipment will work intermittently ∑ Rotary drillers instead of acoustic drillers∑ Vehicular trips will not be at peak traffic hour∑ Ear Plugs to workers∑ No noise polluting work in night shifts

B .Safety & Hygienic Measures:∑ Adequate drinking water, toilet and bathing facilities∑ There will be free medical camps and first aid rooms for workers∑ Safety equipments like helmets, safety shoes etc. to personnel and visitors∑ Personnel protective equipments like leather gloves, goggles and ear muffs when required∑ Personnel working on heights will wear safety equipments and will not work alone∑ To prevent any accidents, the entire area under construction will be cordoned off with tin sheets

and safety tape is run outside this fence∑ Regular pest control will be done∑ Adequate fire fighting equipments will be provided

Operational Phase: Risks in the complex will be due to natural calamities like earthquake, flooding and others such as fire and accidental hazards. All precautions will be taken to control these risks. Fire fighting system shall be provided as per regulations of Chief Fire Officer. For earthquake resistance, the structural design shall be certified as per IS code 875 and IS- 1893-2002 for Seismic Zone 3 of Chennai.

3.12.1 First Aid Facilities:

Construction projects will comes under the highly hazard or specific hazard category. Requirement of the first aid provision at work depends on several factors including size of the undertaking, number of employees, hazard arising , access to medical services, workers in isolated locations, etc. In Construction phase we have planned to appoint one trained first aider for this proposed development project, and a registered nurse.

First Aid Room:

Location, Work Space, Work Environment, Signs & Management – The First Aid room would be easily accessible during working hours and also close to road access. The first aid room would be with easily recognizable signs.

First Aid Minimum Requirements for this proposed construction project:

Furniture & Fittings: Wash basin with hot and cold water supplies, Desk, work bench or dressing trolley, Telephone, Electric power points, Couch with blankets and pillows.

Medical Requirements: Examination Table, Examination Lamp, Stretcher Lifting Frame or similar device for transporting patients, First aid kit, Dressing clothes and gloves, soap, disposable towels, trays and bowls.

3.13 ENVIRONMENT MONITORING PLAN FOR CONSTRUCTION AND OPERATION PHASE

Environmental monitoring plan is a vital process of any management plan of the development project. This helps in signaling the potential problems that resulting from the proposed project and will allow for prompt implementation of effective corrective measures. The environmental monitoring will be required for the construction and operational phases. The main objectives of environmental monitoring area:

ÿ To assess the changes in environmental conditions,ÿ To monitor the effective implementation of mitigation measuresÿ Warn significant deteriorations in environmental quality for further prevention action.

The emissions from each of the diesel generator shall be monitored for exit concentration of Sulphur dioxide, Oxides of Nitrogen and Particulate Matter on regular intervals. The frequency of monitoring shall be decided in consultation with the TNPCB. Sampling ports in the stacks/vents shall be provided in accordance with CPCB guidelines.

Environmental Monitoring Plan

Table 23: Environmental Monitoring Plan

S. No. Description Frequency of Sampling and Analysis

Construction Phase

1. Ambient Air Quality Once in six month- 24 hourly

2. Stack Emissions from DG set Once in month

3. Ambient Noise Level Once in six month

4. Soil Quality Once in six month

5. Ground Water Once in a six month

Operation Phase

1. Ambient Air Quality Once in six months-24 hourly

2. Stack Emissions from DG Set Once in three months

3. Ambient Noise Level Once in six months

4. Treated Sewage Once in a week

5. Ground Water Once in six months

Table 24: Budgetary Allocation for Environmental Management

Construction Phase

DescriptionBudgetary Allocation (Rs. In Lakhs)

Capital Expenses Operational Expenses

Drinking Water & Sanitation (Temporary Toilet) Facilities

5 2

Storm Water Management 3 1

Solid Waste/Debris Management 3 2

Environmental Monitoring 1 1

Dust Suppression Measures 2 1

Occupational Health & Safety 2 2

Total 16 9

Operation Phase:

Description

Budgetary Allocation (Rs. In Lakhs)

Capital ExpensesOperational/

Maintenance Expenses(Per Annum)

Sewage Treatment Plant & Recycling System

25 5

Rain Water Harvesting System 5 2

Solid Waste Management 5 2

Environmental Monitoring 2 2

Energy Conservation 10 2

Greenbelt Development 8 5

Total 55 18

Documents

1POWER REQUIREMENT - environmentclearance.nic.inenvironmentclearance.nic.in/writereaddata/EIA/021220166Z0QRWTFAnnexure...1POWER REQUIREMENT The power requirement during operation is