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KKKBBBMMM EEENNNGGGIIINNNEEEEEERRRIIINNNGGG RRREEESSSEEEAAARRRCCCHHH LLLAAABBBOOORRRAAATTTOOORRRYYY OVER 30 YEARS IN FIELD OF SOIL-CEMENT-CONCRETE TESTING

BUNGALOW NO.H-79, GOTA OGNAJ ROAD, TA.: DASKROI, AHMEDABAD 380060

PHONE: 02717 242373, 02717 241538, FAX: 02717 241538, e-mail: [email protected]

_______________________________________________________

JOB NO. 2118/DR

GEOTECHNICAL INVESTIGATION REPORT

PROJECT : GEOTECHNICAL INVESTIGATION FOR

‘AMARA RESIDENCY’

LOCATION : FP NO.445, BLOCK/S.NO. 371/1/2

AMARA, BESIDES PARIJAT, OPP. IOC PETROL PUMP

NEAR JUDGES BUNGALOW, BODAKDEV

TA: GHATLODIYA, DIST.:AHMEDABAD

CLIENTS : AMAZO REALTY LLP (ZAVERI REALTY)

AHMEDABAD

REPORT ISSUE STATUS Sr. No. Report No. Date Issued

1 2118-DR 23.08.2016

Page 1




________________________________________________________Index

JOB NO. 2118/DR

INDEX SECTION CONTENTS PAGE ABSTRACT 3 INTRODUCTION 4 1.0 SITE CONDITIONS AND NATURE OF INVESTIGATIONS 5 1.1 Location 5 1.2 Field Work 5 1.3 Laboratory Testing 6 1.4 Findings from Investigations 7 2.0 DISCUSSION OF FIELD AND LABORATORY TEST RESULTS 8 2.1 Discussion of Field Test Results 8 3.0 DISCUSSION OF FOUNDATIONS

CONCLUSIONS AND RECOMMENDATIONS 9 3.1 Discussion of Foundations 9 3.2 Conclusions and Recommendations 9 REFERENCES

APPENDICES APPENDIX A: SPECIMEN CALCULATIONS

[A.1] Bearing Capacity calculations based on field and laboratory tests

APPENDIX B: TABLES Table No.1: Standard Penetration Test Results APPENDIX C: DRAWINGS Drg.No.: 2018/00 : Layout plan showing location of test points Drg.No.: 2018/01 : Borelog of Test Bore BH1

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________________________________________________________ Abstract

JOB NO. 2118/DR

ABSTRACT

In the following pages, is presented the Report with Analysis, prepared from the thorough study of Geotechnical investigation results. The detailed scope of work was decided in consultation with the representatives of clients and consultants. A complete geotechnical investigation work was undertaken to obtain the required subsurface informations to study and define the nature and behaviour of soil, under application of loads of proposed structures. Such informations were obtained through following steps:

• by making test bores, and collecting disturbed and undisturbed soil samples.

• by performing required in-situ tests.

• by testing the soil in laboratory to classify it and to determine the engineering properties of soil.

An analysis was made to derive the allowable bearing capacity, taking into consideration the settlements and the present soil conditions with the future possibilities. Based on such analysis of the soil properties, the conclusions are made regarding the nature, behaviour and characteristics of soil. Recommendations are also given, after a thorough and careful study of the present soil conditions, regarding the suitability of type of foundation, and regarding the precautions and protective measures to be taken, if found necessary.

Page 3




________________________________________________________

JOB NO. 2118/DR

GEOTECHNICAL INVESTIGATION REPORT

FOR AMARA RESIDENCY AT BODAKDEV, AHMEDABAD

INTRODUCTION:

We (KBM Engineering Research Laboratory, Ahmedabad) have carried out complete Geotechnical Investigation, covering field work and tests, laboratory tests and analysis to study and establish the subsoil characteristics of the proposed project site. The principal objective of the exploration work was to determine the soil profile, bearing capacities at various depths for type/design of foundations of structures. The entire field testing was carried out as per relevant IS codes and as per the instructions of the representatives of the clients. The samples collected from various test locations, were sealed, labelled and transported to our laboratory at Ahmedabad. The required laboratory tests were conducted as per relevant IS codes. This report has been prepared after careful study of the field and laboratory test results. The type and depth of foundations, are suggested.

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________________________________________________________

JOB NO. 2118/DR

SECTION I

SITE CONDITIONS AND NATURE OF INVESTIGATIONS 1.1 LOCATION: The site is located besides Parijat, opposite IOC Petrol Pump, near Judges Bungalow, Bodakdev, Ahmedabad. 1.2 FIELD WORK:

1.2.1 BORING:

The exploratory test bore was drilled as per IS:1892 at the location suggested by clients/consultants. The exploratory test bore of 100mm to 150mm diameter was drilled by shell and auger method. The depth of test bore at the proposed location was as mentioned below: TEST BORE

DEPTH DRILLED (M)

BH1 12.5

1.2.2 SAMPLING:

1.2.2.1 Disturbed Samples:

Disturbed samples were collected during the boring at a depth 0 to 0.5M below existing G.L. Disturbed samples were also collected where, undisturbed samples were not recovered. The samples were packed in polyethylene bags, labeled and transported to our laboratory at Ahmedabad. 1.2.2.2 Split Spoon Samples:

Standard penetration tests were conducted as per IS:2131 at 1.5M interval or any change in stratum, whichever is earlier, and split spoon samples were collected. The SPT blow counts were noted for 150mm penetration of split spoon sampler. The blow counts were terminated when combined blow counts exceeded 50. The tests were conducted after cleaning the bottom of borehole and sampler centrally seated in position in borehole. The samples were packed in polyethylene bags, labeled and transported to our laboratory at Ahmedabad.

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________________________________________________________

JOB NO. 2118/DR

1.2.2.3 Undisturbed Samples:

Undisturbed soil samples were collected in 100mm diameter, 450mm long thin walled tubes having area ratio of about 15% as per IS:2132 at 1.5M interval or any change in stratum, whichever was earlier. Undisturbed samples were collected in strata consisting of cohesive soil/partly cohesive soil. Undisturbed samples were replaced by standard penetration test in cohesionless strata or where undisturbed samples cannot be collected in hard clay or partly cohesive soil. However to correlate the shear parameters/consolidation parameters with N-values few undisturbed were attempted up to 3M depth below existing G.L. in hard strata. Immediately on retrieval of sampling tube after collection of sample, both ends were sealed with freshly molten wax. The samples were sealed, labelled and transported to our laboratory at Ahmedabad for testing. 1.3 LABORATORY TESTING: Soil samples were collected, sealed and labeled at the site, and sent to our laboratory at Ahmedabad. The test results are given in Appendix B. 1.3.1 Field Density and Natural Water Content (IS:2132, IS:2720 P-2): The volume and weight of sample in UDS tube were determined for calculation of field density. Before emptying tube, wherever, shear tests were to be carried out, smaller sampling tube of 38mm diameter and about 76mm height were pushed into the sample in the direction of sampling on site. For consolidation tests, consolidation ring was pushed and extruded from UDS tube before emptying the same. Water content of the specimen was determined from representative sample taken from UDS tube by oven drying method. 1.3.2 Grain Size Analysis (IS:2720 P-4): The grain size analysis was carried out by wet sieving using sieves of sizes 19mm, 4.75mm, 2mm, 0.425mm and 0.075mm. 1.3.3 Atterberg’s Limit (IS:2720 P-5): Liquid limit test was carried out on fraction passing through 0.425mm sieve by mechanical method (Casangrande’s Apparatus). Plastic limit was also carried out on fraction passing 0.425mm sieve by rolling threads of 3mm diameter at a rate of 80-90 strokes/min till the thread crumbled.

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________________________________________________________

JOB NO. 2118/DR

1.3.4 Unconfined CompressiveTest (IS:2720 P-10): The samples extruded from UDS tube were tested in triaxial test apparatus for determination of unconfined compressive strength without application of cell pressure. 1.3.5 Triaxial Unconsolidated Undrained Test (IS:2720 P-11): The sample extruded from UDS tube were tested in triaxial test apparatus in unconsolidated undrained condition at field density and natural water content with cell pressures of 1kg/cm

2, 2kg/cm

2 and 3kg/cm

2 respectively. The shear strength parameters

(c-φ ) were obtained by plotting Mohr’s circle for peak values. 1.3.6 Direct Shear Test (IS:2720 P-13): The direct shear tests were conducted on remolded sample compacted in shear box at field density/natural water content obtained from undisturbed samples (obtained in cohesive soils and cohesionless soil comprising of fine sand/silts). For cohesionless soil comprising of coarse to medium sand, the soil was compacted at relative density based on N-value and natural water content directly into shear box. The tests were carried out for normal stress of 1kg/cm

2, 2kg/cm

2 and 3kg/cm

2 respectively. The tests on cohesive soils were

carried out in unconsolidated undrained condition while tests on cohesionless soils were

carried out in consolidated drained condition. The shear strength parameters (c-φ) were obtained by plotting graph for applied normal stress and maximum shear stress. The laboratory test results are given in Appendix B. 1.4 FINDINGS FROM INVESTIGATIONS: 1.4.1 SURFACE: The surface is uneven ground in general. 1.4.2 SUBSURFACE: The subsurface consists of the soil formations as shown in the respective borelogs. 1.4.3 GROUND WATER: The ground water table was not encountered within depth drilled.

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________________________________________________________

JOB NO. 2118/DR

SECTION II DISCUSSION ON FIELD AND LABORATORY TEST RESULTS

2.1 DISCUSSION ON FIELD TEST RESULTS: This part deals with the discussion on results of the different field tests conducted during the course of investigation of work. 2.1.1 STANDARD PENETRATION TEST:

A comparative study of N-value (i.e. blow counts per 30 cms of a split spoon sampler with 63.5kg hammer falling freely from 75 cm height) was done for various strata encountered on the work site. The study of N-value indicates as under: Layer No.

Description Approximate Depth (M)

Average N-values From To

1 Filled up soil/stiff dark brown clayey silt 0 2.7 12 2 Very stiff brown clayey silt 2.7 6.8 28 3 Hard brown to reddish brown clayey silt

with sand and kankar 6.8 9.6 31

4 Dense to very dense silty sand with kankar

9.6 12.5 >50

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________________________________________________________

JOB NO. 2118/DR

SECTION III

DISCUSSION OF FOUNDATIONS CONCLUSIONS AND RECOMMENDATIONS

3.1 DISCUSSION OF FOUNDATIONS :

The primary object of these investigations was to study the subsoil characteristics at the site for determining the safe bearing capacity of foundations for the proposed structures. 3.2 CONCLUSIONS AND RECOMMENDATIONS : Looking to the types of the proposed structures and the soil strata encountered, following conclusions are drawn and recommendations are given accordingly:

1. The net safe bearing capacity/allowable bearing pressures for permissible

settlements may be considered as under (specimen calculations are attached in Appendix A).

Type of Foundation

Depth of Foundation

(M)

Width of Foundation

(M)

Net S.B.C./Allowable Bearing Pressure (T/M

2)

For 50 mm Permissible Settlement

Isolated Square Footing

>7

2 to 6 30

Notes:

i. The strata from 7m to 9.6m below the existing G.L. consists of hard brown to reddish brown clayey silt with sand and kankar. Beyond 9.6m depth below existing G.L. the strata consists of very dense brown silty sand with kankar.

ii. After excavation to foundation depth, the bottom of excavation shall be cleared of all loose soil and rubbish and shall be leveled by heavy rammers to an even surface.

2. The foundations shall be kept free from variations in moisture content due to rains,

leakages in service lines etc.

3. If the soil strata encountered during actual excavations are found different from strata mentioned in the Report, the matter should be reported to us for reconsideration.

REPORT PREPARED BY M. P. VORA (M.S., GEOTECHNICAL ENGINEERING)

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________________________________________________________

JOB NO. 2018/DR

APPENDIX A

(SPECIMEN CALCULATIONS)

Page 11

[A.1]-SPECIMEN CALCULATIONS OF BEARING CAPACITY BASED ON

LABORATORY TEST RESULTS:

TYPE OF FOUNDATION: ISOLATED COLUMN FOOTING

Depth of Foundation = 7.00 M

Width of Foundation = 3.00 M

γ ..0.002 kg cm3

D .7.0 m

γ' γ ..0.001 kg cm3

Df .1.5 m (effective surcharge)

B .3.00 m L .3.0 m =γ' 0.001 .kg cm3

c ..0.5 kg cm2

φ .25 deg

TAKING CASE OF LOCAL SHEAR FAILURE

φ' atan( ).0.67 tan( )φ

=φ' 17.35 deg

AS PER IS:6403:1981

q'd = 2/3 c N'c sc dc ic + q (N'q-1) sq dq iq + 0.5 B γ N'γ sγ dγ iγ W`

Where,

q'd = Net ultimate bearing capacity based on local shear failure

c = Cohesion in kg/sq cm

N'c,N'q and N'γ = Bearing capacity factors

sc, sq and sγ = Shape factors

dc, dq and dγ = Depth factors

ic, iq and iγ = Inclination factors

q = Effective surcharge at base level of foundation in kg/sq cm

B = Width of footing in cms

γ = Bulk unit weight of foundation soil in kg/cc

W' = Correction factor for location of water table

Taking values from field and laboratory test results,

BEARING CAPACITY FACTORS:

N'q .tanπ

4

φ'

2

2

e.π tan( )φ'

=N'q 4.936

N'c .( )N'q 1 cot( )φ'

=N'c 12.599

N'γ ..2 ( )N'q 1 tan( )φ'

=N'γ 3.709

SHAPE FACTORS

( FOR SQUARE FOOTING):

INCLINATION FACTORS

(NO INCLINATION):

sc 1.3ic 1

sq 1.2iq 1

sγ 0.8iγ 1

Page 12

DEPTH FACTORS (φ` > 10o):

SQRTN'φ tanπ

4

φ'

2

=SQRTN'φ 1.36

dc 1 ..0.2Df

BSQRTN'φ

=dc 1.136

dq 1 ..0.1Df

BSQRTN'φ

dγ dq =dq 1.068

EFFECTIVE SURCHARGE:

q .Df γ

=q 0.3 kg cm2

CORRECTION FOR WATER TABLE:

W' 1 (no ground water table within foundation depth)

BEARING CAPACITY AS PER IS:6403:1981

q'd .....2

3c N'c sc dc ic ....q ( )N'q 1 sq dq iq .......0.5 B γ N'γ sγ dγ iγ W'

=q'd 8.666 kg cm2

Taking factor of safety as 2.5,

SBCq'd

2.5

=SBC 3.467 kg cm2

CHECK FOR SETTLEMENT:

The Total Settlement is given by

Sf = Si + Sc

Where,

Sf = Final settlement in cm for a given load per unit area of a footing width of B

Si = Immediate settlement

Sc = Consolidation settlement

(1) Computation of consolidation settlement Sc asper IS:8009(Part I)-1976

Sc = λ Soed

where,

Sc = Consolidation settlement

λ = A factor related to pore pressure parameter A and the ratio H/B

Ht ( Po + ∆p)

Soed = ------- Cc log10 (--------------)

1+eo ( Po )

where,

Soed = Settlement computed from one dimensional consolidation

Ht = Thickness of compressive layer in cm

Page 13

Po = Initial effective pressure at mid height of compressible layer in kg/sq cm

∆p = Pressure increment in kg/ sqcm

eo = Initial void ratio

Cc = Compression index

Pc = Preconsolidation pressure in kg/sq cm

From field and laboratory test results,

For 50mm Permissible Settlement

P ..3.0 kg cm2

Ht .1.5 B

=Ht 4.5 m

γ' γ ..0.001 kg cm3

=γ' 0.001 kg cm3

Po .Df γ .Ht

2γ'

=Po 0.525 kg cm2

B1B

2L1

L

2

=B1 1.5 m =L1 1.5 m

zHt

2=z 2.25 m

=L1

z0.667

=B1

z0.667

IB 0.12

∆p ..4 P IB

=∆p 1.44 kg cm2

eo 0.6

Cc 0.2

=Cc 0.2

Soed ..Ht

( )1 eoCc log

Po ∆p

Po

=Soed 32.243 cm

Considering over consolidated clay (N>30)

λ 0.2

Sc .λ Soed=Sc 6.449 cm

Page 14

(2) COMPUTATION OF IMMEDIATE SETTLEMENT Si:

P B (1 - µ2) I

Si = --------------------

E

Where,

Si = Immediate settlement in cm

P = Foundation pressure in kg/sq cm

B = Width of footing in cm

µ = Poisson`s ratio

E = Modulus of elasticity in kg/sq cm

I = Influence factor

From field and laboratory test results,

µ 0.5

E ..300 kg cm2

I 0.95

Si...P B 1 µ

2I

E=Si 2.138 cm

TOTAL FINAL SETTLEMENT Sf:

Sf Sc Si

=Sf 8.586 cm

(i) Applying correction for depth

DF 0.6

Sfd .DF Sf

=Sfd 5.152 cm

(ii) Applying correction for rigidity

RF 0.8

Sfr .Sfd RF

=Sfr 4.121 cm

This value is less than permissible settlement of 5 cm as per IS:1904.

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________________________________________________________

Appendix B

JOB NO. 2018/DR

APPENDIX B

(TABLES)

Page 16

KBM ENGINEERING RESEARCH LABORATORY JOB NO.: 2118

H-79, PRARTHANA BUNGALOWS, VASANTNAGAR TOWNSHIP TABLE NO.: 1.1

GOTA-OGNAJ ROAD,AHMEDABAD-380 060 PAGE NO.: 1/1

PHONE: 02717 242373 , 02717 241538, FAX: 02717 241538 e-mail: [email protected]

STANDARD PENETRATION TEST (as per IS:2131)

PROJECT: SOIL INVESTIGATION FOR PROPOSED SITE

AT BODAKDEV, AHMEDABAD TEST BORE: BH1

METHOD OF MAKING BORE HOLE: Shell and auger up to 15m, rotary drilling beyond 15m

DEPTH TO WATER TABLE: Not encountered within depth drilled

TEST DATE NUMBER OF BLOWS TO DRIVE SAMPLER (MM) N-VALUE CORRECTED N-VALUE Recommended

DEPTH OF 0 TO 0 TO 0 TO 0 TO 0 TO 0 TO NUMBER OF BLOWS N' N" Values

(METRES) TEST 75 150 225 300 375 450 FOR LAST 300 MM (for overburden) (for dilatancy)

START DATE:22.08.2016 COMPLETION DATE:

1.50 22.8.16 3 6 9 12 15 18 12 -

4.50 22.8.16 5 11 17 24 31 39 28 -

7.50 22.8.16 5 11 17 25 33 42 31 -

10.00 22.8.16 8 18 29 45 60 68/400MM >50 -

NOTES: 1) The test results refers only to the location and depth at which the tests were carried out.

2) This report shall not be reproduced except in full, without written approval from the laboratory.

3) The testing was carried out by the personnels of our laboratory.

4) Recommended N-values are after applying correction for over burden and dilatancy for cohesionless/fine sand and silt Mihir Voraand also extrapolating wherever number of blow counts exceeded 50. Authorised Signatory

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________________________________________________________

Appendix C

JOB NO. 2018/DR

APPENDIX C

(DRAWINGS)

Page 18

BH2

BH1

NOTE - DEPTH OF BORE HOLE SHOULD BE

150mm DIA x 25 mt DEEP FROM EXISTING GROUND LEVEL

LAYOUT FOR BORE HOLE LOCATION ONLY

CHECKED

DRG. NO.

DRAWN

A1

SHEET SIZE

BH.S.1016516SCALE

JOB NO REVISION

R0

DESIGN

31.03.16

DATE

CHBY DRDATE REVISIONNO.

TITLE

TITLE

JOB

DRAWING

CHiRAG----1:200

ARCHITECT APURVA AMIN ARCHITECTS

DASHRATH

"AMARA"RESIDENCE FOR ZAVERI &CO.

STRUCTURAL CONSULTANT

GENERAL NOTES :-

Page 19

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Sarkhej-Gandhinagar Highway

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15 . 00 M T W I D E R O A D

RAMPEXIT

RAMPENTRY

ENTRY

Project name Amara (Residential Project)

Survey number, F.P. No, TPS No Block Number: 371/1+2, Final plot no 445,

T.P.S. Number : 1/B (Bodakdev),

Land area ( m )2 5142

Proposed FSI ( m )2 16,800

Total Built up area ( m )2 31,129.26

Number of floor HP + 7 Floor

Total number of Residential units 56

Gound coverage m 2718.37

Hollow Plinth Parking, m 1200 (42 ECS)

Bodakdev, Ahmedabad

Maximum height of building, (m) 25m

ENGINEER

STR. ENGINEEROWNER

C.O.W.

SCHEDULE FOR OPENING STAIR DETAILSR.S. = D = FPD1 =

W = 4.00 X 2.45

COLOUR NOTE

PLOT BOUND.

PERCO. WELL

ROAD

D2 =

WIDTHTREAD

RISER

0.30 MTR.

0.15 MTR.

2.00 MTR.

AUTHORITY

4.00 X 2.451.05 X 2.100.91 X 2.100.76 X 2.10

(FULLY GLASS WITHSAFETY GRILL )

DEVLOPER

COMM. PLOT

2

Basement area m 8282.3 (258 ECS)2

Common Plot area m 5202

2

List Information

Hilldarshan Co. Op. Housing Soc. Limited - Vibhag 8

HORIZONTAL :- 1.00 CM. = 4.00 MT.VERTICAL :- 1.00 CM. = 1.00 MT.

DRAINAGE SECTION

29

.25

SCALE

INVERT LVL.

GROUND LVL.

DIST. IN MT.

30

.00

0.0

0

CUTTING 0.7

5

I.C. 0

.75 X

0.75

WIT

H 0

.70 Ø

V.P

.

LEVELM.H

.1 0

.75 X

0.75

TO MU NI MAN HOLE

GROUND M.H

.2 0

.75 X

0.75

M.H

.3 0

.75 X

0.75

M.H

. 0.7

5 X 0.

75

29

.25

30

.00

21

.49

1.0

3

29

.25

30

.00

44

.82

1.3

4

29

.25

30

.00

75

.56

1.7

5

29

.25

30

.00

91

.73

1.9

7

STEEL // TO B

GR. LVL.

COL. STIRRUPS

COL. SIZE

VERTICAL STEEL

STEEL // TO L

P.C.C. 1:4::8

TYP. COLUMN FOOTING SECTION

PEDESTAL

PBPB

GR. LVL.

AS

PER

ST

RU

. D

ETAI

LS

STRUCTURE DESIGN AS PER STRUCTURAL ENGINEER

TO 4000.00SQ.MTS.AND PART THERE OF IT.FOR BUILDING UNIT 1500.00SQ.MTS. OR MORE AND UP

Typical design for percolation well

NOTE:-

(THIS IS ONLY SKETCH PLAN)

10.0

0M

75mmØ gravel packing

strainer

150mmØ strainer pipe300mmØ bore

300mm0 p.v.c. pipe

G.L.

air vent

G.L.Perforated r.c.c. slab

course sand 300mm.pea gravel 300mm.gravel 300mm

c.c. channel with c.i. jali on top ofchannel.

filterationmediasize:-2.00x2.50x2.50m.

Catch pit with

D=U

P TO

UN

DER

GRO

UN

D II

nd (

SECO

ND

) RI

VE

R (A

QU

IFER

)

PERCOLATING WELL

(NOT TO SCALE)

N

W

E

S

Annexure 5: Water balance Construction phase:

S. No. Purpose

Water Requirement Wastewater Generation

Quantity (kld) Remarks Quantity

(kld) Remarks

1. Domestic water for labour

6.75

45 lpcd for 150 workers

Arrangement for domestic water requirement will

be met by contractor

5.73 Wastewater will be disposed into septic tank

2. Dust suppression 5 - - Losses

3. Use in

construction, curing etc

10 - - Losses

Total 21.75 5.73 Operation phase:

S. No. Purpose

Water Requirement Wastewater Generation

Quantity (kld) Remarks Quantity (kld) Remarks

1. Domestic water for residential flats 45.36

180 lpcd for 252

Occupants 36.28 @ 80% of water

consumption Discharged into sewer

line 2. Visitors 0.75 @ 15 lpcd

for 50 visitors

0.6

3. Green belt development 2.08

@4.0 lit/Sq. meter of

total green area (520

m2)

0

Total 48.19 36.88

mailto:@4.0

Water balance diagram operation phase

Fresh water 48.19 kld

Domestic Water requirement

45.36 kld

Horticulture 2.08 kld

To Sewer Line 36.88 kld

Visitors 0.75 kld

Annexure 6: Storm water management Storm Water Drainage System The rainwater will be collected through piped drains and conveyed into rainwater harvesting system for filtration. All storm water drains have been designed for adequate size and slope such that there shall not be any flooding in the site. It shall be ensured that no wastewater shall enter into storm water drainage system. Rainwater Harvesting Plan Adequate rainwater harvesting pits will be provided in the project premises. The rainwater collected from the project area will be conveyed into the rainwater harvesting system consisting of Desilting-cum-Filter Chamber, Oil & Grease Separators and finally shall be conveyed into recharge pits and balance if any will be disposed municipal storm water line. Details of maximum storm water generated Description Area in sq m Maximum rainfall

intensity In m/h

Runoff coefficient

Total storm water In cum/h

Roof area 2718.37 0.045 0.8 97.86 Paved area 1903.63 0.045 0.5 42.83 Green area 520 0.045 0.2 4.68 Total 5142 145.37 2 No of Percolation Well required Annual recharge of ground water Description Area in sq m Maximum rainfall

intensity In m/Annual

Runoff coefficient

Total storm water In cum/annual

Roof area 2718.37 0.762 0.8 1657.11 Paved area 1903.63 0.762 0.5 725.28 Green area 520 0.762 0.2 79.24 Total 5142 2461.63 Annual recharge of ground water ~ 2000 m3

Rain water harvesting scheme

Annexure 7: Fire and Safety Proposed building height is 67.5 m from ground level. All fire protection facilities will be designed as per the latest National Building Code given in 2005,

Residential Flats is in Group A, sub Group A-4 Fire Zone No.1 (clause 3.2.2.2)

Following component/item will be provided: Under the clauses (4.18.2, 6.1.2, 6.2.3, 6.3.2, 6.4.3, 6.5.2, 6.5.2.1, 6.5.2.2, 6.5.2.3, 6.5.2.4, 6.5.2.5, 6.6.2, 6.7.2, 6.8.2 and 6.9.2) following are minimum requirements for fire fighting installations.

Fire Extinguishers Hose Reel Wet riser Automatic sprinkler system Manually Operated Electric Fire Alarm System Terrace Tank -10,000 liter (Two Number) Underground Tank -1,00,000 liter (One Number) One electric and one diesel pump of capacity 1620 liter/min and one electric

pump of capacity 180 liter/min at terrace tank level with minimum pressure of 2 kg/cm2 - 900 l/min

Based upon the Occupancy (Clause 4.3, Table 20, NBC):

Residential group Unit Value Occupant load m2/person 12.5

Occupants per unit exit width

Number of occupants Stairways-25 Ramps-50 Doors -75

Travel distance form occupancy

m 30

Annexure 8: Environmental Management Plan 1.0 Structure of EMP

Environmental Management Plan (EMP) is the key to ensure a safe and clean environment. The desired results from the environmental mitigation measures proposed in the project may not be obtained without a management plan to assure its proper implementation & function. The EMP envisages the plans for the proper implementation of mitigation measures to reduce the adverse impacts arising out of the project activities. EMP has been prepared addressing the issues like:

• Pollution control/mitigation measures for abatement of the undesirable impacts caused during the

construction and operation stage • Details of management plans (Landscape plan, Solid waste management plan etc.) • Institutional set up identified/recommended for implementation of the EMP • Post project environmental monitoring programme to be undertaken • Expenditures for environmental protection measures and budget for EMP

2.0 Proposed Environmental Mitigation Measures

The major impacts due to different project activities were identified during the EIA study. The mitigation measures proposed for the impacts constitute the part of Environmental Management Plan (EMP). The environmental mitigation measures for construction and operation phases have been given in Table1.

Table 1. Proposed Environmental Mitigation Measures

Area Mitigation Measures Construction Stage: Water quality • Toilet and drinking water facilities for construction workers are provided by the

contractor at the construction site to avoid unhygienic condition at site. Air quality • Dust suppression measures are undertaken such as regular sprinkling of water

around vulnerable areas of the construction site by suitable methods to control fugitive dust during earthwork and construction material handling/ over hauling.

• Properly tuned construction machinery & vehicles in good working condition with low noise & emission are used and engines are turned off when not in use.

Noise level • Protective gears such as ear mufflers etc. are provided to construction personnel exposed to high noise levels.

Solid wastes • Waste construction materials are recycled and excess construction debris are disposed at designated places in tune with the local norms.

Landscape • Appropriate landscape including plantation of evergreen and ornamental flowering trees, palms, shrubs and ground covers at open spaces within the complex will be done, which would serve the dual purpose of controlling fugitive dust and improving the aesthetics of the area.

Safety • Adequate safety measures complying to the occupational safety manuals are adopted to prevent accidents/hazards to the construction workers.

Operation Stage: Water quality • Wastewater will be collected and disposed into municipal line.

Two number of rainwater harvesting recharge wells will be developed Air quality • Trained staff will be handle traffic movement

• Regular monitoring of ambient air quality will be carried out as per norms. Solid wastes • Solid wastes will be segregated into organic and inorganic components.

• The recyclable inorganic wastes will be sold to prospective buyers. • The bio-degradable wastes will be disposed near by municipal bins.

Rainwater harvesting

• Adequate rainwater harvesting will be provided

Fire protection • Adequate fire protection facilities will be installed including fire detectors, fire alarm and fire fighting system as per National Building Code of India.

Landscape • Proper maintenance of landscape round the year including replacement of the decayed plants.

Safety • Adequate safety measures complying to the occupational safety manuals to prevent accidents/hazards to the maintenance workers.

Others • The building will be provided with disabled-friendly design, timber-free construction, energy efficient lighting & ventilation, and control of indoor

environment.

3.0 Environmental Monitoring Plan

It is imperative that the Project Authority set up regular monitoring stations to assess the quality of the surrounding environment after the commissioning of the project. An environmental monitoring programme is important as it provides useful information and helps to: • Verify the predictions on environmental impacts presented in this study, • Assist in detecting the development of any unwanted environmental situation, and thus, provides

opportunities for adopting appropriate control measures, and • Evaluate the performance and effectiveness of mitigation measures proposed in the EMP and

suggest improvements in management plan, if required, • Satisfy the legal and statutory obligations. The post project monitoring plan including areas, number and location of monitoring stations, frequency of sampling and parameters to be covered is summarized in Table 2. The monitoring will be the responsibility of EMC.

Table 2: Environmental Monitoring Plan Source Monitoring Location Parameters to be

Monitored Frequency

Ambient Air Quality At 3 locations (1 inside the complex and 2 outside in surrounding 1 km zone along predominant wind directions)

PM10, PM2.5, SO2, NOxOnce in a season and as per requirement of SPCB

Ambient Noise At 3 locations (1 inside the complex and 2 outside in surrounding 100 m zone)

Day and night equivalent noise level

Once in a season and as per requirement of SPCB

Stack Stack PM, SO2, NOx, CO Once in a season and as per requirement of SPCB

The post operational monitoring schedule will be under the supervision of the Site Engineer at the project site. Monitoring will be carried out by recognized laboratories.

4.0 Environment Management Cell An Environment Management Cell (EMC) will be responsible for implementation of the post project-monitoring plan for this project. The composition of the Environment Management Cell and responsibilities of its various members are given in Table 3.

Table 3. Environment Management Cell

S. No. Designation Proposed responsibility

1. Chairman of Society Overall responsibility for environment management and decision making for all environmental issues

2. Secretary Hires a Consultant and fulfills all legal Requirements as per MOEF/GPCB/CPCB

3. Supervisor Ensure environmental monitoring as per appropriate procedures

5.0 Environmental Budget

A capital cost provision of about Rs. 13.5 lakh has been kept in the project cost towards the environmental protection, control & mitigation measures and implementation of the EMP. The budgetary cost estimate for the EMP is given in Table 4.

Table 4 Environmental Budget

S.

No. Head Approximate

recurring cost per annum (Rs.

in lacs)

Approximate Capital cost (Rs. In lacs)

Basis for cost estimates

1. Air 1.0 2.5 Stack and DG room

2. Solid and hazardous

waste management

2.0 3.0 Provide bins door to door and transportation cost

3. Environment monitoring

3.5 0 The recurring cost would be incurred on hiring of consult-ants and payment of various statutory fees to regulatory

agencies. 4. Rain water 2.0 5.0 Collection system, treatment

and recharge well 5. Green belt 1.0 3.0 -

Total 9.5 13.5

6.0 General Principles in Greenbelt Design Plants grown in such a way so as to function as pollutant sinks are collectively referred as greenbelt. These plants should also provide an aesthetic backdrop for persons using the site and for the surrounding community. General principles in greenbelt design considered for this study are:

Type of pollution (air, noise, water and land pollution) likely from the activities at the site

Semi arid zone and sub-zone where the greenbelt is located (and hence the plant species which can be planted in the area).

Water quantity and quality available in the area

Soil quality in the area

Greenbelt is designed to minimize the predicted levels of the possible air and noise pollutants. While designing the scheme the following facilities are considered:

Site perimeter and approach road

Along the internal roads

In and around the building area

To ensure a permanent green shield around the periphery planting is recommended in two phases.

In the first phase one row of evergreen and fast growing trees (which grows up to 10-15m) with maturity period of around three years shall be planted at 3.0 meter interval along with fast growing ground covers to enhance the water holding capacity, improve the organic content and check the soil erosion.

In the second phase after eighteen months, second row of trees with large leaf surface area with large ever green canopy and longer life span shall be planted at 6.0 meters intervals.

6.1 Greenbelt Design for Site The selection of the trees is based on their phenology (thus road side trees will not have leaf fall during summer and rainy seasons when shade is most needed). Trees with more litter fall have been avoided.

The selection criteria of the species are based on pollution mitigation capacity (including particulate matter), large leaf surface area to deep root system and less litter fall. Faster growing trees with lighter canopy will be planted alternatively with relatively slow growing trees with wider canopy. Trees of about 6.0 m heights will be planted at 4.5 m intervals, 2.5 m away from the road curbing as per CPCB guidelines. Trees will be planted along the outer periphery at centerline of road between the set back line and the boundary of the plots. Palms and shrubs will be planted along the roads and around recreational lawns.

6.2 Greenbelt Management It is presumed that the selected plants will be grown as per normal horticultural practice and the authorities responsible for the plantation will make adequate provisions for water and protection of the saplings. A budgetary cost estimate is also prepared for greenbelt development.

Water source Water tankers may also be used at the initial stages of development of the plant.

Irrigation method Water hydrants may be installed at 50 m intervals to irrigate area under shrubs and ground covers.

6.3 Improving Indoor Air Quality The indoor air quality can be improved by any of the following:

Ventilation

Include the use of natural, dilution, local exhaust, or increased ventilation efficiency. The most effective engineering control for prevention of indoor air quality problems is assuring an adequate supply of fresh outdoor air through natural or mechanical ventilation.

When possible, use local exhaust ventilation and enclosure to capture and remove contaminants generated by specific processes. Room air in which contaminants are generated should be discharged directly outdoors rather than recirculated.

Outside air intakes should not be located in close proximity to potential sources of contamination (automobile garages, building exhausts, and roadways).

Work Place Recommendations

Eliminate or control all known and potential sources of microbial contaminants by prompt cleanup and repair of all areas where water collection and leakage has occurred including floors, roofs, drain pans, humidifiers containing reservoirs of stagnant water, air washers etc.

Remove and discard porous organic materials that are contaminated (e.g., damp insulation in ventilation system, ceiling tiles, and carpets).

Clean and disinfect non-porous surfaces where microbial growth has occurred

Maintain indoor air relative humidity below 60%

Adjust intake of outdoor air to avoid contamination from nearby soil, vegetable debris unless air is adequately conditioned.

Isolate, if feasible, areas of renovation, painting, carpet laying, pesticide application, etc., from occupied areas that are not under construction.

Supply adequate ventilation during and after completion of work to assist in diluting the contaminant levels.

Eliminate or reduce contamination of the air supply with cigarette smoke by banning smoking or restricting smoking to designated areas which have their air discharged directly to the outdoor rather than recirculated.

6.4 Safety Aspects of the Project The following needs to be implemented:

Fall Protection

The Contractor is required to provide fall protection to employees who are working at heights equal to or greater than 1.8 m. fall protection can be in the form of perimeter protection such as guardrails and toe rails, personal protective equipment (PPE), a safety monitoring system, or a fall protection plan. Activities that require personal fall protection systems include steel erection bolting, riveting, fitting-up and plumbing-up, work over water and some deep excavation work.

On buildings or structures not adaptable to temporary floors, and where scaffolds are not used, safety nets will be installed and maintained whenever the potential fall distance exceeds two storey.

The PPE standard should cover occupational foot, head, hearing, and eye protection.

Foot Protection: If machines or operations present the potential for foot injury, the Contractor must provide foot protection, which is of safe design and construction for the work to be performed. Workers and visitors should not be allowed on a construction site without safety boots.

Head Protection: If head hazards remain after all steps have been taken to control them (safety nets for work at heights, proper housekeeping), the Contractor must provide employees with appropriate head protection.

Noise Protection: Workers should be wearing hearing protection devices (ear plugs, ear muffs, canal caps) that are in good condition whenever they are involved in noisy activities.

Eye Protection: When machines or operations present potential eye injury from physical or chemical elements, the Contractor must select, provide, maintain and required affected employees to use appropriate eye protection. Eye protection (safety glasses and goggles, face shields and welding helmets) must be adequate and reasonably comfortable.

To the greatest extent possible, working surfaces must be kept dry to prevent slips and falls and to reduce the chance of nuisance odors from pooled water.

All equipment and materials should be stored in designated storage areas that are labeled as such.

Ladders and Stairs

The Contractor is required to inspect and maintain all ladders and temporary/portable steps to ensure that they are in good working condition.

Portable ladders used for access to an upper landing surface must extend a minimum of 1.8 m above the landing surface, or where not practical, be provided with grab rails and be secured against movement while in use.

All ladders must be used only on stable and level surfaces unless secured to prevent accidental movement. Ladders must not be used on slippery surfaces unless secured or provided with slip-resistant feet to prevent accidental movement.

The Contractor should provide a ladder (or stairway) at all work points of access where there is a break in elevation of 0.5 m or more.

When there is only one point of access between levels, it must be kept clear to permit free passage by workers. If free passage becomes restricted, a second point of access must be provided and used. At all times, at least one point of access must be kept clear.

All required stairway and ladder fall protection systems must be provided and installed before employees begin work that requires them to use stairways or ladders.

Scaffolds

Access to Scaffolds - access to and between scaffold platforms more than 0.6 m above or below the point of access will be made by portable/attachable ladders or ramps.

Employees must never use makeshift devices, such as boxes and barrels, to increase the scaffold platform working level height.

Trenching and Excavation

The area around the trench/excavation would be kept clear of surface encumbrances.

Water should not be allowed to accumulate in the excavation.

Adjacent structures would be shored in accordance with the design documents to prevent collapse.

Guardrails or some other means of protecting people from falling into the trench/excavation would be present.

The trench or excavation would be shored or sloped to prevent cave-ins.

Electrical Safety

If work has to be done near an overhead power line, the line must be de-energized and grounded before work is started.

A licensed electrician would have completed all temporary wiring and electrical installations required for construction activities.

Fuses and circuit breakers would be used to protect motherboards, conductors and equipment.

Extension cords for equipment or as part of a temporary wiring system will not be damaged or compromised in any way and insulation must be of the highest grade.

Anytime electrical equipment is deactivated for repair, or circuits are shut off, the equipment will be locked out and tagged at the point where it can be energized.

Temporary lights may not be suspended by their cords.

The Contractor would provide the necessary safety equipment, supplies and monitoring equipment to their personnel.

Cranes A competent person has been designated to supervise activities that require the use of cranes. Cranes would not be operated near any power lines. All picks would be carefully planned to ensure that the crane adequately hoist the load. The hoisting signals would be posted on the exterior of the crane.

Occupational Noise Exposure

The Contractor should implement engineering controls to reduce noise levels.

The Contractor should provide hearing protection to employees that are exposed to noise levels above the permissible limit.

Welding and Cutting

The Contractor's employees would be trained in hot work procedures.

There should be adequate ventilation to reduce the build up of metal fume.

The hot work operators would use proper personal protective equipment (i.e., welding helmet, burning goggles, face shield, welding gloves, and apron).

There would be a fire extinguisher present at all welding and burning activities.

Extinguishers would also be placed at locations where slag and sparks may fall.

Oxygen and flammable gas bottles are separated by at least 7 m when not in use.

The Contractor would control the release of gases, vapors, fumes, dusts, and mists with engineering controls (e.g., adequate ventilation).

General Guidelines

Signs and symbols would be visible during any construction activity that presents a hazard. Upon completion of such activity, the postings must be removed immediately.

The Contractor would post specific DANGER signs when an immediate hazard exists and specific CAUTION signs when the potential for a hazard exists. EXIT, NOTICE and specific safety signs may also be posted in the work area.

Signage for traffic control, including directional signs, is applicable when the Contractor is disrupting traffic along a public way.

Danger signs are posted at all immediate hazards (i.e. Danger: Open Hole).

Caution signs are posted at all potential hazards (i.e. Caution: Construction Area, Caution: Buried Cable).

The floor that is being used as the erection floor must be solidly planked or decked over its entire surface except for access openings.

Every floor, working place and passageway would be kept free from protruding nails, splinters, holes or loose boards.

Combustible scrap and debris (wood, clearing/grubbing material) would be removed from the site daily or should be securely stored in covered containers.

The Contractor would have a spill prevention control and countermeasure plan that limits the risk of releases of oil or hazardous materials to the environment.

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