M/s Navaratna Estates proposes to construct Commercial Building project at BlockNo.45, Waltair Ward in division No.18, Ramnagar, Visakhapatnam, Andhra Pradesh.
2.1 THE PROJECT LOCATIONThe project is envisaged to develop 0.47 hectares in Survey No. 1032/2B, Block No.45,Waltair Ward in division No.18, Ramnagar, Visakhapatnam into commercial building forRetail space and Commercial office. The project site is surrounded by residential andcommercial buildings in all the directions except in north direction. An existing 12 mroad and proposed to widen 18 m road in north direction. Bay of Bengal is at a distanceof 1.76 km. The nearest railway station is Visakhapatnam railway station at a distance of2.0 km.
2.2 PROJECT DESCRIPTION2.2.1 DESIGN STAGEThe land area available for the project is 0.47 hectares and will be allocated for RetailShops/showrooms, office space based on the development rules of GVMC. It isproposed to provide 2 cellar floors for parking. The land allocation and the number ofunits proposed are presented in table 2.1.
The project obtained Environmental Clearance order from State level EnvironmentalImpact Assessment Authority, Andhra Pradesh, Ministry of Environment and Forest,for development of commercial building Construction project vide Order no.SEIAA/AP/VSP/CON/07/2017/366, dated 01-09-2017.Present proposal is for new Environmental clearance in place of old area withincrease in number of parking floors and built up area.Construction not initiated as on date -Seeking new Environmental clearance inplace of the old Environmental clearance
EC OBTAINED PROPOSED SITE AREA 4788.6 m2 4788.6 m2
It is proposed to develop commercial block with an Retail Show rooms/Shops in G+2floors, office space from 3rd to 7th floor. The land allocation will be optimized toensure compliance with the regulations of GVMC. The water requirement of the projectduring operation will be drawn from GVMC. Sewage treatment plant will be provided
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 2
to treat the sewage/wastewater. Water conservation measures will be incorporated inthe plumbing designs. Water recycling/reuse will be adopted by way of using treatedsewage for green belt development. The rainwater will be let-out into the storm waterdrain and discharged into external drains. The required power will be drawn from theAPTRANSCO. Solar Energy will be used for fencing, and for common lighting. Thedesigns of the building will also incorporate Indian Architectural principles of “Vastu”,as the market demands the same. Construction material will be drawn from localsources. The parking provision follows the guidelines prescribed by GVMC and Buildingpolicy of Andhra Pradesh. The layout of the project site is presented in fig. 2.1 andtypical floor plans are presented in fig. 2.2. The parking provision follows the guidelinesprescribed by GVMC and Building policy of Andhra Pradesh.
Table 2.1 Land Allocation for various purposes - Proposed
Land Use No of Floors Total Site Areain m2
Total Built up area(m2)
Retail G+2nd
1925.46169.0
Office 3rd to 7th 12075.0Green Area 462.0Road Area 1817.4Open Area 366.0Road Widening 217.9ParkingCellar - 1 3148.0Cellar - 2 3148.0Cellar - 3 3148.0Total 3C+G+7 4788.6 27688.0
Table 2.2 Land Allocation for various purposes - EC Obtained
Land Use No of Floors Total Site Areain m2
Total Built up area(m2)
Retail G+2nd
1925.46475.3
Office 3rd to 7th 12171.6Green Area 462.0Road Area 1817.4Open Area 366.0Road Widening 217.9ParkingCellar - 1 3665.7Cellar - 2 3665.7Total 2C+G+7 4788.6 25978.2
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 3
PARKING PROVISIONIt is proposed to provide 3 Cellar floors with 2 floors mechanical parking. The parkingprovision follows the guidelines prescribed by GVMC and Building policy of AndhraPradesh. The parking floor plan of the project is presented in fig. 2.3. The number ofparking spaces provided is presented in table 2.3.
Table 2.3 Parking Space Provision of the ProjectFloor 4 - Wheeler 2 - Wheeler
Required Parking as per GO 119, Go AP 6020.5 33%Parking Provided 9444.0 54%Required Parking as per MoEF & NBC 370Parking Provided 424
Circulation Plan:Ground Floor Driveway : 8.0 mNo. of Cellars : 3No. of Ramps : 2 - One wayWidth of Ramp : 4.5 mSlope of Ramp : 1 in 8Cellar Driveway : 5.0 mNo. of Lifts : 6Capacity of each Lift: 20 pax.Connecting Road : 12 m ROW
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 4
Fig 2.1 Layout
+ 1 0 0 .2 0 L v l
4 5 0 0 W ID E R A M PS L O P E 1 IN 8
U P FR O M C E L L A R -2
4 5 0 0 W ID E R A M PS L O P E 1 IN 8
D N TO C E L L A R -2 EXIT
TOGR
OUND
ENTR
Y TO
CELL
AR 1
A R E A L E F T FO R R O A D
W ID E N IN G
uti l ity/ s ervice s( 93 sq m t. )
P R O P O S E D 1 8 M W ID E M A IN
R O A D
(E X IS T IN G 1 2 .0 M W ID E R O A D )
8.00
M W
IDE
DRI
VEW
AY
8 . 0 0 M W I D E D R I V E W A Y
P R O P O S E D R E TA IL A N D O FF IC E B U IL D IN GP L IN TH A R E A - 1 9 2 5 sq m (2 0 7 2 0 S q ft)
SERV
ICE B
ALCO
NY EX
TENT
ABO
VE(2
ND -7
TH FL
OOR)
2 1 6 2 62 9 8 8 0
1403812866
172 9
7
12526
1 85 4
921
5 43
5307
2 5 8 2 1
2 0 5 9 6
7 2 3 3
3549
12152
1514
753
582
8 0 1 7
8000
8000
8 0 3 9
8 1 6 4
80018000
3 5 2 0 08 0 1 1
4500
TO T LO T - 2 : ( 2 52 s q mt . )
TO T LO T - 2 : ( 20 9 sq mt. )
V E N T . D U C TF O R C EL LA R -2
( 3 9 9 Sq . ft)
8 . 0 0 M W I D ED R I V E W A Y
+ 9 9 .1 2 Lv l
+ 9 9 .6 3 Lv l
+ 1 0 0 .3 0 Lv l
+ 1 0 0 .9 2 Lv l
+ 1 0 1 .8 1 Lv l
+ 9 9 .5 0 Lv l
SERV
ICE B
ALCO
NY EX
TENT
ABO
VE(2
ND -7
TH FL
OOR)
SERV
ICE B
ALCO
NY EX
TENT
ABO
VE(2
ND -7
TH FL
OOR)
SERV
ICE B
ALCO
NY EX
TENT
ABO
VE(2
ND -7
TH FL
OOR)
S E R V IC E B A L C O N Y E X T E N T A B O V E(2 N D -7 TH F LO O R )
F IR S T F L O O R E X TE N TS
4500
PL.
SHAF
T
U P
U P
M A IN E N TR YT O R E TA IL
C A N O P Y A T S E C O N D F LO O R
5470
0
8.00
M W
IDE
DRI
VEW
AY
2200
8.00
M W
IDE
DRI
VEW
AY
8.00
M W
IDE
DRI
VEW
AY
6010
0
S IT E P L A N
PL.
SHAF
TPL
.SH
AFT
PL.
SHAF
T
2 3 8 2 1
PL.
SHAF
T
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 5
Fig 2.2 Typical floor plan
SERVICE BALCONY (2ND -7TH FLOOR)SE
RVIC
E BA
LCO
NY
(2N
D -7
TH F
LOO
R)
SERV
ICE
BALC
ON
Y (2
ND
-7TH
FLO
OR)
RETAIL SPACE+107.25 Lvl
1100
FRD
CANOPY AT SECOND FLOOR
SERV
ICE
BALC
ON
Y (2
ND
-7TH
FLO
OR)
SERV
ICE
BALC
ON
Y (2
ND
-7TH
FLO
OR)
34800
34800
2230
020
150
27000
6010
0
35200
W.C
W.C
W.C
W.C
W.C
W.C
W.C
Janitor
W.C
W.C
W4
FRD
AREA FORTOILET (G)
7700 X 3800
AREA FORTOILET (L)
7700 X 2800
UPDN
LIFT LOBBY(ENTRY TO OFFICE FLOORS)
7700 x 4700
STA
IRC
ASE
-2
UP
DN
W4
STAIRCASE-13200 x 6400
PASSR.LIFT
2400x2400
PASSR.LIFT
2400x2400
LIFT LOBBY(ENTRY TO RETAIL FLOORS)
GOODS LIFT(for office)3200x2400
SERV
ICE
SHA
FT11
00 X
150
0
SERV
ICE
SHA
FT11
00 X
150
0
PASSR.LIFT
2400x2400
PASSR.LIFT
2400x2400
PASSR.LIFT
2400x2400
FIRESHAFT
FIRESHAFT
+110.70 Lvl
SPACE FOR LMR(AS PER VEND.
DETAIL)
2000
UPDN
FRD
OFFICE SPACE
W4
STAIRCASE-13200 x 6400
SERVICE BALCONY (2ND -7TH FLOOR)
SERV
ICE
BALC
ON
Y (2
ND
-7TH
FLO
OR)
SERV
ICE
BALC
ON
Y (2
ND
-7TH
FLO
OR)
SERV
ICE
BALC
ON
Y (2
ND
-7TH
FLO
OR)
SERV
ICE
BALC
ON
Y (2
ND
-7TH
FLO
OR)
GOODS LIFT(for office)3200x2400
Provision forToilets
TENTATIVE LINE OF SEPARATION FOR MULTIPLE OFFICE SPACE OPTION
TENTATIVE LINE OF SEPARATION FOR MULTIPLE OFFICE SPACE OPTION
TENTATIVE LINE OF SEPARATION FOR MULTIPLE OFFICE SPACE OPTION
TENTATIVE LINE OF SEPARATION FOR MULTIPLE OFFICE SPACE OPTION
1590015900 3000
1150
010
800
1150
015
500
1580015800 3000
4915
9900
5185
11102
W.C
D1
W.C
D2
W.C
D1
W.C
D2
W.C
D1
W.C
D2
W.C
D1
W.C
D2
W.C
D1
W.C
D2
W.C
D1
W.C
D2
W.C
D1
W.C
D2
D1
W.C
D1
D2
W.C
D2
6010
0
35200
FRD
W4
LIFT LOBBY(ENTRY TO OFFICE FLOORS)
7700 x 4700
STA
IRC
ASE
-2
UP
DN
SERV
ICE
SHA
FT11
00 X
150
0
SERV
ICE
SHA
FT11
00 X
150
0
PASSR.LIFT
2400x2400
PASSR.LIFT
2400x2400
PASSR.LIFT
2400x2400
FIRESHAFT
FIRESHAFT
SPACE FOR LMR(AS PER VEND.
DETAIL)
D1
D2
D1
D2
D1
D2
D1
D2
D1
D2
D1
D2
D1
D2
SECOND FLOOR PLAN
THIRD FLOOR PLAN
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 6
Fig 2.3 Parking Floors
SPACE FOR SERVICES(123.58 Sqmt)
VENT. DUCTFOR CELLAR -2
BELOW(6.00 sq.m)
3902
300
LIFT LOBBY(ENTRY TO OFFICE FLOORS)
8800 x 5000
PASSR.LIFT
2400x2400
PASSR.LIFT
2400x2400
PASSR.LIFT
2400x2400
UP
5.00M WIDE DRIVEWAY
4.70M WIDE DRIVEWAY
4.50
M W
IDE
DRIV
EWAY
4.50
M W
IDE
DRIV
EWAY
4500 WIDE RAMPSLOPE 1 IN 10
DN FROM CELLAR-2
INUP TO CELLAR -2
OUT4500 WIDE RAMP
SLOPE 1 IN 10
SPACE FORSERVICES
UP
UPSHA
FT24
00 X
600
UTILITY
43895
SPACE FORSERVICES
LIFT L
OBB
Y(E
NTR
Y TO
RET
AIL )
4500
4580
UP
FRD
GOODS LIFT(for office)3000x2400
PASSR.LIFT
2400x2400
PASSR.LIFT
2400x2400
STAI
RCAS
E-1
3800
1200
STAI
RCAS
E-2
UP FRD 1.50
M W
IDE
CO
RRID
OR
FRD
3000
LOBBY
4.70M WIDE DRIVEWAY
SHAFT1900X1200
F. SHAFT900X1200
4500
VENT. DUCTFOR CELLAR -2
BELOW(10.75 sq.m)
RCC
Ret
aini
ng W
all
RCC
Ret
aini
ng W
all
41900RCC Retaining Wall
91.60 Lvl
4500 4500
4000
4000
4000
4000
4000
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 7
2.2.1.1 Storm water drainsConservation of water resource is most important aspect of the project duringconstruction and occupation phases. Storm water drainage planning, domestic waterplanning and sewerage transfer and sewage treatment planning are critical aspects ofconstruction and occupation stages of project.
Storm water drains will be provided all over the site to meet the expected increase inthe runoff during rainy seasons due to the impervious nature of the roads and otherpaved areas. It is proposed to maintain the levels as much as possible storm water isletting into side drains of main road. The expected runoff is calculated for the entire siteis mentioned below.
Calculation for Storm Water DrainQuantity of storm water(a) With out projectArea of Catchment, ‘A’ : 0.4789 HaRun off Coefficient, ‘C’ : 0.6Maximum intensity of rainfall, ‘I’ : 100 mm/hrTherefore Q : 0.080 m3/sec
(b) With project :Area for catchment for roof and road : 0.396 HaArea of Catchment, ‘A’ : HaRun off Coefficient, ‘C’ : 0.396Maximum intensity of rainfall, ‘I’ : 0.9 mm/hrTherefore Q = : 40 m3/sec
0.040Area for catchment for open areas : 0.083 HaRun off Coefficient, ‘C’ : 0.6Maximum intensity of rainfall, ‘I’ : 100 mm/hrTherefore Q = : 0.014 m3/secTotal Discharge : 0.053 m3/secBut, Discharge, Q = A/V
Where,A= Area of the Drain,V= Max. Permissible Velocity : 6 m/sec for concrete drain
Area of drain, ‘A’ = Q/V : 0.009 m2
Taking depth of drain as 0.6 m at thestarting point : 0.6Width of drain = Area/depth = : 0.015 m 15 mmWidth of the drain is to taken 15 mm and depth varies according to the slope ofground.
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 8
Table 2.4. Strom Water Runoff
Land Use Area inHectares
Vol./hrafter
development C=0.8
Vol./hrbefore
Development C=0.6
Difference inDischarges Remarks
RoofArea 0.19 154.0 115.5 38.5
Stored in a sump of 40m3 capacity and is usedfor domestic purpose
RoadArea 0.20 162.8 122.1 40.7 Harvested in 11 nos. of
RWH pits are providedof size
1.2m x 1.2m x 1.5 mOpenArea 0.08 24.8 49.6 -24.8
Total 0.48 54.4* C=0.3 after development of greenery
Fig 2.4 Rainwater Harvesting Structures
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 9
2.2.1.2 Water Availability: Water is required for the construction as well as duringoccupation stage as the same is an important resource. The water requirement duringconstruction will be on an average of 30 cum/day with a peak demand of 60 cum/day,and during occupation stage in the order of 75.0 KLD. The water resource availablewith the Municipal authorities was studied to identify the source and feasibility. Thewater resource both domestic water and sewage is dealt by the Greater VisakhapatnamMunicipal Corporation (GVMC) in the GVMC area.
Domestic Water: It is proposed to draw domestic water from the Municipal Supply(GVMC), which have been encouraging the bulk consumers. The water shortage if anyduring summer season will be drawn from ground water sources. The waterrequirement of the project during occupation stage is in the order of 75.0 KLD. Thewater requirement during construction will be from ground water sources and therequirement is in the order of 30 cum/day.
The water requirement for the project during the occupation stage is presented in table2.5. The water saving for the project is presented in table 2.6.
Table 2.5 Water Requirement of the Project
Land Use No. ofPersons
Water requirementper person in l *
Total WaterRequirement in KLD
Office 1200 45 54.0Retail 800 15 12.0Retail employees 200 45 9.0TOTAL 75.0*Water requirement as per NBC
The effective water consumption is reduced by 36.0 kl/day and the requirement will bein the order of 39.0 kl/day. The water balance of the project during occupation stageis tabulated in table 2.7
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 10
Table 2.7 Water BalanceInput KL/Day Output KL/Day
Domestic water from GVMC 39.0 HVAC Chillers 22.5Recycled water 36.0 Recycled water 36.0
Water requirement for greenbelt during non monsoon 1.5Losses approx 20% 15.0
Total 75.0 Total 75.0
The water used in the order of 75.0 KL/day would generate 60.0 KL/day of wastewater,which has to be treated for reuse and or disposal. The effluent characteristics ofwastewater are presented in table 2.8.
PROCESS DESCRIPTION:The raw sewage will be collected in a collection sump and pumped to mechanical barscreen chamber for removal of large floating matter followed by grit removal in GritChamber. The raw sewage will then be collected in an equalization tank forhomogenization of hydraulic load. The tank contents will be kept in suspension bymeans of course bubble serration through pipe grid. The equalization tank, with airflow indicator for continuous monitoring of air supply to the tank in order to avoidseptic conditions, will be covered from top (RCC or FRP) to avoid nuisance. Theequalized effluent will then be pumped to two Fluidized Aerobic Bio Reactors (FAB) inseries where BOD/COD reduction can be achieved by virtue of aerobic microbialactivities. The oxygen required will be supplied through coarse air bubble diffusers.The bio-solids formed in the biological process will be separated in the down streamTube Settler. The clear supernatant will gravitate to the chlorine contact tank wheresodium hypochlorite will be dosed for disinfection of treated water prior to disposal.
The biological sludge generated in the FAB and settled in the tube settlers will becollected in a sludge sump and then pumped to sludge drying bed for de watering. Thedried sludge will then be disposed off suitably as manure. The schematics of theprocess are shown. The two main components of the treatment system viz. The FABreactor and tube settler are described in the following sections.
Fluidized Aerobic Bio Reactor (FAB)Conventional effluent treatment plants are large sized, power intensive and require alot of monitoring. Scarcity of open space and rising land a power costs have forced theindustries to look our for space saving, compact and efficient treatment options. Thishas led to the development attached growth processes where the bio mass is retainedwithin the aeration tank obviating the need for recycle. These plants are not onlycompact but also user friendly. The endeavor to have a continuously operating, no-clogging biofilm reactor with no need for back washing, low head-loss and high specificbiofilm surface area culminated in the most advanced technology of aerobic biologicalfluidized bed treatment where the biofilm (biomass) grows on small carrier elements
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 11
that move along with the water in the reactor. The movement is normally caused byaeration in the aerobic version of the reactor.
The reactor combines all the advantages and best features of Trickling filters, Rotatingbiological contractors, activated sludge process and submerged fixed film reactors whileeliminating the drawbacks of these systems. The plants are more compact and moreenergy efficient.
The Fluidized Aerobic Bio Reactor (FAB) consists of a tank in any shape filled up withsmall carrier elements. The elements are made up of special grade PVC orpolypropylene of controlled density (shown in plate). For media of specific gravity 0.92-0.96 the overall density could be expected to increase up to 9.5% when full of biomasssuch that they can fluidize using an aeration device. A biofilm develops on theelements, which move along the effluent in the reactor. The movement within thereactor is generated by providing aeration with the help of diffusers placed at thebottom of the reactor. Then thin biofilm on the elements enables the bacteria to actupon the biodegradable matter in the effluent and reduce the BOD/COD content in thepresence of oxygen available from the air that is used for fluidization.
Table 2.8 Characteristics of Waste waterParameter Quantity in mg/l
Effective area of screen RequiredAt average flow : 0.005 m2
At Peak flow : 0.0075 m2
Provide Effective area of screen : 0.0075 m2
Considering the bar of dia. 10 mm(w) and clear spacing of 20 mm (b)Overall area required : 0.011 m2
Considering screen depth as : 0.022 mNumber of clear spacing : 0.3Number of bars : 1 Consider 2 Nos.Hence Provide 4 barsProvide a screen of 0.5 m X 0.5 m at an inclination of sin 600. In a screen channel ofone meter (1 m) length.
2. Grit Chamber :The flow from the bar screen chamber is let into the Grit Chamber of minimum 2hours capacity. This tank is provided to even out the flow variation, and to provide acontinuous feed into the secondary biological treatment units.Peak flow Q : 0.014 m3/secProviding a flow through velocity of 0.30 m/secCross sectional area of Channel : 0.016 m2
Surface area of channel : 0.38 m2
Assuming depth d : 0.2 mWidth of channel : 0.08 m (say 0.3m)Length of channel : 4.5 m (say 4.5 m)Provide two channels each of 0.3 m wide and 4.5 m long with depth of waste water 0.2m.
3. Equalization tank:The flow from the bar screen chamber is let into the equalization tank of minimum2hours capacity. This tank is provided to even out the flow variation, and to provide acontinuous feed into the secondary biological treatment units.Average flow : 2.9 m3/hrPeak factor : 3.5Peak flow : 10.2 m3/hrHydraulic retention tank = 2 hrs at Peak flowHence required volume of the tank : 20.4 m3
Provide tank of : 20.4 m3 CapacityAssuming depth : 3 mArea : 6.8 m2
Assuming length to width ratio (1:1) ; l=b
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 13
length of the tank : 2.6 mwidth of the tank : 2.6 mAir required for agitation : 0.01 m3/ m2 minTotal air required : 14 m3/hrAir blower required : 20 m3/hr @ 3.8 mwcEffluent transfer pump : 2.9 m3/hr @ 8 mwc
4. Fluidized Aerobic Bio Reactor (FAB):The polypropylene media have been provided with a specific surface area of 350 – 520m2 /m3. This allows micro-organisms to get attached and biomass concentration canbe increased to four folds as compared to Activated Sludge Process. This enables toconsider higher Organic loading rates.
The micro-organisms attached to media are kept in a fluid state thereby maintainingthe CSTR (continuous Stirrer tank reactor) regime as well as two tanks are provided inseries making the plug – flow system. This will enhance the efficiencies and have themerits of both CSTR and plug-flow regimes.Organic loading rate : 3.2 kg BOD/ m3 dOrganic load : 52 kg/dayVolume of the tank : 16.25 m3
Assume the depth : 3 mNo. of tanks in series : 1Size of the tank : 1.5m dia. x 5.0 SWDSpecific gravity of media : 0.92 to 0.96Specific surface area of media : 350 – 520 m2 /m3
Media filling : 30 – 50 % of tank volumeOxygen required : 2 kg / kg BODOxygen in air : 23%Specific gravity of air @ 30 deg. : 1.65Aeration : Coarse bubbleOxygen transfer efficiency : 12%Air required : 129 m3/hrAir blower required : 150 m3/hr @ 6.5 m wc
Tank size :3.0 m x 6.0 m x 2.7 m SWD With55 deg. hopper bottom
Tube Modules : 3.0m x 6.0 m x 0.6 m ht.Tube inclination : 60 deg.
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 14
Settling area for 60 deg slope : 11 m2 /m3
Cross sectional area of tubes : 120 mm x 44 mm HexagonalHydraulic radius : 1/61 cm (1.5 cm)Shape factor : 0.6 – 0.7 for media settleable solids
6. Pre Filtration tankThe flow from the each individual settling tank i.e., the supernatant liquid is let intothe respective Pre-Filtration Tank, which has a minimum 1.5 hours holding capacity.This tank is provided to hold the treated effluent and give an even flow to thepressure sand filter.Average flow : 2.9 m3/hrPeak factor : 2 m3/hrPeak flow : 5.8 m3/hrProvide min 1.5 hours holding capacity.Hence required volume of the tank : 8.7 m3
7. Pressure Sand Filter:Vertical down flow type with graded/sand bed under drain plate with polysterenestrains.Flow : 75 m3/dayRate of filtration assumed as : 10 m3/m2/hrRequirement of treated water for usage in 20 hrs : 4 m3/hrDia. of filter of 1 nos. : 500 mmProvide pressure sand filter of 500 mm dia. and 1000 mm HOS with sand as medialayer, under drain pipe, laterals face piping etc for each stream.
8. Activated Carbon Filter:Vertical down flow type with graded/sand bed under drain plate with polysterenestrains.Flow : 75 m3/dayRate of filtration assumed as : 10 m3/m2/hrRequirement of treated water for usage in 20 hrs : 4 m3/hrDia of filter of 1 nos. : 500 mmProvide Activated Carbon filter of 500 mm dia with granular Activated carbon asmedia and 1000 mm HOS with sand as media layer, under drain pipe, laterals facepiping etc for each stream.
9.Ultraviolet Disinfection:UV applied to low turbidity water is a highly effective means of disinfection. UV is notharmful to aquatic organisms in the receiving water. UV light kills viruses, Vegetative-
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 15
and spore-forming bacteria, algae and yeasts. No chemicals are added to thewastewater to change the pH, conductivity, odor or taste to create possible toxiccompounds. UV treatment has a few moving parts to adjust or wear out.
10.Final Treated Water Holding TankIt is always preferred to provide one final holding tank of minimum one day holdingcapacity, so that the treated effluents can be stored and used back for gardening orother tertiary purposes.Capacity: 75 m3
11. Sludge Filter Press:The biomass in the aeration tank stabilizes BOD in wastewater by consuming theorganic matter in the wastewater. The metabolic activity results in growth of thebiomass population in the Fluidized Aerobic Bio Reactor (FAB). Sludge holding tankhas been provided with filter press for dewatering sludge. The filtrate drains offthrough the media, which is again let into equalization tank. The dewatered sludge iscollected in trays, which can be used as manure in the garden.No. of plates : 24Size of plates : 600 mm X 600 mmPlate moc (material of construction) : PP (poly propline)Type of operation : HydraulicPower pack capacity : 2 HP
Sludge holding tank has been provided with filter press for dewatering sludge. Thefiltrate drains off through the media, which is again let into equalization tank. Thedewatered sludge is collected in trays, which can be used as manure in the garden.
Characteristics of Treated Waste waterParameter Quantity in mg/l
pH 7.3Total Suspended Solids 20BOD 10COD 50
Disposal of Treated Wastewater: The treated water shall be treated and reused forflushing the toilets, followed by on land irrigation and HVAC make up waterrequirement, and on land irrigation. Hence all the recycled water is utilized completelyand is considered as a zero discharge.
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 16
Fig 2.5 Sewage Treatment Flow Diagram
SEW
AG
E TR
EATM
ENT
PLA
NT
FLU
IDIZ
ED A
ERO
BIC
BIO
REA
CTO
R TE
CHN
OLO
GY
(FAB
)
Slud
geD
ewat
erin
gSy
stem
EQT
TAN
K
PSF
ACF
BarS
cree
n/ G
ritCh
ambe
r
Raw
Sew
age
Ove
rflo
w
Filte
r Fee
dPu
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Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 17
2.2.1.3 Solid WasteMunicipal Solid Waste CompositionIn India the biodegradable portion dominates the bulk of Municipal Solid Waste.Generally the biodegradable portion is mainly due to food and yard waste. The table 2.9presents Composition of Municipal Solid Waste.
Table 2.9 Composition of Municipal Solid WasteType Composition (%) Solid waste in kg
Total 100 500(Source: NSWAI- National Solid Waste Association of India estimate)
Design StageThe total number of people anticipated to stay in the project is in the range of 1000 –1500. The anticipated solid waste/garbage is in the range of 500 g/head, and the totalgarbage will be in the order of 80 kg/day. The present practice is to collect the garbageusing the services of NGO’s and send it to the segregation point by cycle-rickshaws.This would be disposed of through the disposal system of Greater Visakha MunicipalCorporation either at the existing Kapuluppada land fill site or at the new facility beingdeveloped under Jnnurm. The table 2.10 presents the anticipated garbage quantityafter occupation. The responsibility of garbage collection and disposal lies with GreaterVisakha Municipal Corporation, however the project authorities propose to educate theresidents to segregate the waste at source before disposal.
Table: 2.10. Solid Waste GenerationLand Use Total No. of Persons Total Solid waste in Kgs
2.2.2 CONSTRUCTION STAGEThe sequence of construction operations and the approximate time requirement ispresented in the following table 2.11. The construction sequence is for more number offloors. The time schedule of the entire project is approximately 24 months.
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 18
Table: 2.11 Construction SequenceS.No Description of work
1 Clearing and Grubbing2 Leveling by way of cut and fill3 Foundation Excavation.4 Foundation PCC & Concrete & Plinth Beam.5 Column lifting up to GF Roof.6 1st floor slab reinforcement & shuttering & Concreting.7 Stair case slab8 1st floor column lifting up to 1st floor roof.9 1st floor roof shuttering, reinforcement & concreting.
10 Deshuttering of GF Roof & cleaning.11 Deshuttering of 1st Roof & cleaning.12 Brick work in GF floor.13 Brick work in 1st floor.14 Staircase up to terrace.15 Staircase headroom slab.16 Plumbing works (concealed works).
17 Fixing of door & window frames.18 Plinth filling & floor PCC.19 Floor Tiling Works, Bath Room, kitchen & platform works.20 Staircase stone works.21 Terrace waterproofing works.22 Parapet wall in terrace & miscellaneous works.23 Fixing of door & window shutters.24 Fixing of sanitary fittings.25 Electrical wiring & fixtures.26 Painting works.27 External development & compound wall.
The clearing and grubbing activity involves clearing of shrubs mainly as the site has nomajor trees. The cut and fill operation for the entire area is presented in table 2.12.
Table 2.12 Earth Work QuantitiesS.No Area Qty. of fill.
(m3)Qty of cut
(m3)Surplus fill
(m3)Surplus cut
(m3)1 Site 4597 5746 --- 1149
The construction of this magnitude would require huge quantities of constructionmaterials. The material requirement for the project is presented in table 2.13. Thusaggregate requirement will be met from within the plant site. The lead distance forvarious construction materials is presented in table 2.14.
Table: 2.14 Lead distances for Construction MaterialsS.No. Material Source Lead Distance (Km)
1 Sand ROBOSAND and Gov.registered suppliers. 150 – 240
2 Aggregate With in the site 0 – 23 Cement Manufacturing units 140 – 2004 Reinforcement Steel SAIL/TATA godowns 105 Bricks Local Manufacturers 0-156 Plumbing Material Local suppliers 2 – 77 Electrical Material Local Suppliers 2 – 78 Sanitary Material Local suppliers 2 – 7
9 Flooring andPavement Tiles
Manufacturers 100-150
10 Paints Local Manufacturers 10 – 25
2.2.2.1 Water RequirementThe water required for this project is in the order of 6700 cum for the entire projectimplementation period. The peak demand for water may be 60 cum/day, howevertypical daily consumption will be in the order of 30 cum/day. The required water willbe drawn from ground water sources. The water supply and plumbing will be optimizedand low water consuming faucets and flush tanks will be used to conserve water.
2.2.2.2 Construction DebrisThe construction debris consists of various types of materials. The construction debriswill be in both hazardous and non-hazardous categories. The hazardous debris consistsempty containers of adhesives, thinners, paints, and petroleum products. These emptycontainers will be sold to authorize recycling agencies. The non hazardous wastescontain recyclable debris like iron and other metal, glass, plastics, cartons of paper,wood etc. These wastes will be sent for reuse/recycle. The waste percentage will bein the order of 2%. Construction debris containing bricks, demolished RCC will be usedfor land filling in the place of subgrade.
2.2.2.3 PaintsAll the paints used in the premises will be ensured to have an albedo of at least 0.4 toincrease the reflectivity and reduce the heat dissipation and heat island effects.
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 20
2.2.2.4 Work Force:The labor/work force requirement is approximately 5000 man-days of various skilledand unskilled employees. Sufficient labor force and skilled employees are available asVisakhapatnam is a favorite destination of skilled employees and migrating people fromthe rural areas. The peak labor force requirement will be in the order of 1000 people.The water requirement for the labor force will be approximately 5000 lt/day.
2.2.2.5 Material preparation and transportMost of the construction material will be drawn from outside. The material will betransported by trucks and the approximate number of truck trips is 900. The materialtransport within the site will be facilitated by 8 trippers.
2.2.3 OCCUPATION PHASEA number of facilities will be provided by M/s Navaratna Estates for the occupants andthe facilities are shown in table 2.15.
Table 2.15. Amenities ProposedAmenity Nos. or description
Tot Lots and Green Area 462 m2
Sewage Treatment Plant 1DG Sets 1500 kVA X 3 nos.Community Center 1
The owners/purchasers will form cooperatives to run the amenities like sewagetreatment plant, DG sets. The major requirement of resource is for electricity andwater. The electricity will be drawn from APTRANSCO. Transformers will be providedto reduce voltage fluctuation and to provide quality energy. The power requirementduring operation phase is presented in table 2.16.
Table 2.16 Electricity Consumption Statement
S.No Description Total areain m2
Powerallocated in
watts per m2
Total Powerrequired in (KW)
1 Commercial &Common area
18244 50.00 912.20
Total 912.20
Maximum demand in kw at 0.6 diversity factor 547.3Consumption of power for 12 hours per day 6567.8Maximum demand in kw at 0.1 diversity factor 91.2Consumption of power for 12 hours per day 1094.6Total consumption of power per day 7662.5 KWTotal consumption of power per year 28.0 Lakh Units
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 21
Table 2.17 Energy Saving by using copper wound transformers for Comm.Power loss using CU. wound transformer 1.20%Savings in power loss using CU wound transformer 0.3 Lakh Units
Table 2.18 Energy Saving by using HF BallastPower loss using conventional ballast 25%Power loss using HF ballast 14%Savings in power loss using HF ballast 11%
S.No DescriptionTotal
area inm2
Powerallocatedin wattsper m2
Total Powerrequired in
(KW)
1 Parking 9444 3.00 28.332 Common Area 5473 5.00 27.37
Total 55.70Maximum demand in kw at 0.8 diversity factor 44.6Consumption of power for 12 hours per day 534.7Maximum demand in kw at 0.2 diversity factor 11.1Consumption of power for 12 hours per day 133.7Total consumption of power per day 668.4 KWTotal consumption of power per year 2.4 Lakh UnitsSavings in power loss using HF ballast 0.3 Lakh Units
Table 2.19 Electrical Power savings using CFL/T5 for lightingSavings in power Using CFL/T5 as against Fluorescent Lamps 30%
S. No. Description Total areain m2
Powerallocated in
watts per m2
Total Powerrequired in
(KW)1 Parking 9444 3.00 28.332 Common Area 5473 5.00 27.37
Total 55.70
Maximum demand in kw at 0.8 diversity factor 44.6Consumption of power for 12 hours per day 534.7Maximum demand in kw at 0.2 diversity factor 11.1Consumption of power for 12 hours per day 133.7Total consumption of power per day 668.4 KWTotal consumption of power per year 2.4 Lakh UnitsSavings in power using CFL 0.7 Lakh Units
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 22
Table 2.20 Electrical Power savings using Solar Power for External lighting
S.No Description Total areain m2
Powerallocated in
watts per m2
Total Powerrequired in
(KW)1 External Lighting 5.00
Total 5.00
Maximum demand in kw at 1.0 diversity factor 5.0Consumption of power for 6 hours per day 30.0Maximum demand in kw at 0.5 diversity factor 2.5Consumption of power for 6 hours per day 15.0Total consumption of power per day 45.0 KWTotal consumption of power per year 0.16 Lakh UnitsSavings in power using Solar Power 0.16 Lakh Units
Table 2.21 Electrical Power savings using water Cooled Chillers
Savings in power by using Water Cooled Chillers as against Air cooled Chiller 40%
S.No DescriptionTotal
area inm2
Powerallocated in
watts per m2
Total Powerrequired in
(KW)1 Commercial 18244 25.00 456.10
Total 456.10Maximum demand in kw at 0.6 diversity factor 273.7Consumption of power for 12 hours per day 3283.9Maximum demand in kw at 0.1 diversity factor 45.6Consumption of power for 12 hours per day 547.3Total consumption of power per day 3831.2 KWTotal consumption of power per year 14.0 Lakh UnitsSavings in power using water Cooled Chillers and heatrecovery wheel 5.59
Lakh Units
Table 2.22 Total Saving
S.No Description Savings in lakhkwh units
Savings inpercentage
1 With Cu wound Transformer 0.3 1.22 with HF Ballast 0.3 0.013 With CFL/LED 0.7 2.64 With Water Cooled Chillers 5.6 20.05 With Solar Power for External lighting 0.2 0.6
Total Consumption 28.0Total Saving 7.1 25.4
Navaratna Estates Environmental Impact Statement
Team Labs and Consultants2 - 23
2.2.3.1 Domestic WaterThe domestic water will be drawn from Ground water to augment the supplies. Thewastewater will be treated and reused for gardening. The line providing treated waterwill be colored blue and ensured that the tank is at least 1 foot below the level of othertanks and a distance of minimum 2 feet from the other water pipelines.
2.2.3.2 Solid WasteThe solid wastes anticipated during occupation stage include garbage, sludge from STP,hazardous waste of used oils, and batteries from generators. The quantity of wastes ispresented in table 2.23.
Table: 2.23. Solid Waste Generated during Occupation PhaseS.No Type of Waste Quantity Collection/storage Disposal
1 Garbage 500kg/day
Segregation at source intobio-degradable, non bio-degradable and DomesticHazardous wastes.Disposal of recyclablewaste to AuthorizedWaste Pickers /Authorized Recyclers.Balance segregated wastegiven to AuthorizedAgency of Local Body.
Municipal solidwaste disposal
2Sewage
Treatment PlantSludge
4 kg/day Stored in HDPE bags.
Used asmanure and or
given tofarmers.
3 Used Batteries 8 nos.year
Sent toAuthorizedrecyclers orreturned to
seller
4 Used Lubricant 110 l/year Stored in HDPE CarbouySold to
authorizedrecyclers
5 Transformer Oil 130 l/year Stored in HDPE Drum
Sold toAPTRANSCOauthorizedcontractors
6 e-waste Stored in designatedLocation
Sent toAuthorized e -
wastemanagement
facility
M/s NAVARATNA ESTATESSURVEY NOS. 1032/2B, BLOCK NO.45,WALTAIR WARD IN DIVISION NO.18,
RAMNAGAR, VISAKHAPATNAM
Studies and Documentation by:Team Labs and Consultants(An ISO Certified Organization)B-115 – 117 & 509, Annapurna Block,Aditya Enclave, Ameerpet,Hyderabad- 500 038Phone: 91-040-23748555/23748616Fax : 91-040-23748666e-mail: [email protected]
