Draft Environment Impact Assessment Report For Onshore ... · Draft Environment Impact Assessment Report For Onshore Development and Production of Oil & Gas from 406 wells in 40 ML

Draft Environment Impact Assessment Report

For

Onshore Development and Production of Oil & Gas from

406 wells in 40 ML Blocks of Districts Mehsana,

Ahmedabad, Patan and Gandhinagar, Gujarat

NABET Sector No. 2 MoEFCC Sector No. 1(b) Category: A

Baseline Data collected by: ABC Techno Labs India Private Limited, Chennai

NABL Certificate No. TC-5770 Validity 28/11/2019

EIA Report Prepared By: Corporate HSE, Oil and Natural Gas Corporation, New Delhi

QCI NABET Certificate No. NABET/EIA/1821/RA0124 Validity 26/05/2021

APRIL 2019

(I) Declaration by Experts contributing to the EIA

I, hereby, certify that I was a part of the EIA team in the following capacity that developed

the above EIA.

EIA coordinator: Name: Harendra Singh

Signature and Date:

EIA Coordinator:

Name: Dr. Naveen Raj

Signature

Period of involvement: July 2018 till date

Functional area experts:

S. no. Functional Area Name of

the Experts

Involvement

(Period and task)

Signature and

date

1. AP FAE Dr. Naveen Raj

AAQ monitoring plan,

impact prediction &

management plan

studies (July’2018 till

date)

FAE Ashish Bhuvan

AAQ monitoring plan,

impact prediction &

management plan


date)

2 WP* FAE B.P.Babu

Water Pollution

monitoring, Prevention

and Control studies

(July’2018 till date)

FAE Dr. Naveen

Raj

Water Pollution


and Control studies


FAE H.J.

Godbole

Water Pollution


and Control studies


FAE Ashish

Bhuvan

Water Pollution


and Control studies


FAE Vartika Rai Water Pollution


and Control studies


FAE Vipul Kumar

Sharma

Water Pollution


and Control studies


FAE Surjeet

Singh

Water Pollution


and Control studies


TM Rajeeva

Kumar

Water Pollution


and Control studies


2. 4 SE* FAE S.K.Mohap

atra

Socioeconomic study


3. 5 EB* FAE Dr. Archana

Yadav

Ecology & Biodiversity


date)

TM Golap

Chandra

Boruah

Ecology & Biodiversity


date)

4. 6 HG* FAE Dr. Ravi

Mishra

Hydrology Studies


5. 7 GEO* FAE Dr. Ravi

Mishra

Geology studies


6. SC* FAE R R Dwivedi

Soil Quality, impacts

and conservation

measures (July’2018 till

date)

TM Rajeeva

Kumar

Soil Quality, impacts

and conservation

measures (July’2018 till

date)

7. 9 AQ* FAE Setu Goyal Air quality assessment


date)

8. 1

0

NV* FAE D.K.Trivedi Noise/Vibration Studies


TM Alaknanda

Dubey

Noise/Vibration Studies


9. 1

1

LU* FAE Nilay

Meshram

Land Use Studies


10. 1

2

RH* FAE Amlan

Chakraborty

Risk Assessment and

DMP studies (July’2018

till date)

11. SHW FAE Dr. Naveen

Raj

Management of

Hazardous Waste

(July’2018 till date

(II) Declaration by the Head of the accredited consultant organization/

authorized person

I, Dr. Naveen Raj, hereby, confirm that the above mentioned experts prepared the EIA

“Onshore Development and Production of Oil & Gas from 406 wells in 40 ML Blocks of Districts

Mehsana, Ahmedabad, Patan and Gandhinagar, Gujarat”. I also confirm that the consultant

organization shall be fully accountable for any mis-leading information mentioned in this

statement.

Signature:

Name: Dr. Naveen Raj

Designation: Chief General Manager

Name of the EIA consultant organization: Oil & Natural Gas Corporation Ltd.

NABET Certificate No. & Issue Date: NABET/EIA/1821/RA0124, 26/05/2021

(III) Review and Revision History

History of revisions of the present report

Rev Date Modifications

Rev. 00 Draft 15/03/2019 Preliminary Draft EIA Report

Rev.01 Draft 02/04/2019 Draft EIA report for Reviewer Comments

Rev. 02 Draft 26/04/2019 Final Draft EIA report

(IV) Document No. ONGC/CHSE/EIA/MEH Asset/2018-19/01

Rev. 02 Draft 26/04/2019 Final Draft EIA

report

Rajeeva

Kumar

Dr.Naveen Raj

Rev.01 Draft 02/04/2019 Draft EIA report

for Reviewer

Comments

Nilay

Meshram

Alaknanda Dubey

Rev. 00 Draft 15/03/2019 Preliminary Draft

EIA Report

Setu Goyal Vipul Kumar

Sharma

REV DATE DESCRIPTION REVIEWER-1 REVIEWER-2

Onshore Development and Production of Oil and Gas from 406 wells in 40 ML Blocks of District Mehsana, Ahmedabad, Patan and Gandhinagar, Gujarat

Doc. No. ONGC/CHSE/EIA/MEH Asset/2018-19/01

Rev. No. 02

Issue date 26/04/2019

TABLE OF CONTENTS

TABLE OF CONTENTS

Abbreviations & Glossary i-ix

ToR Compliance x-xiii

Executive Summary xiv-xxv

CHAPTER-1: INTRODUCTION

1.0 Introduction 1-2

1.1 Purpose of the Report 1-2

1.2 Identification of Project and Project Proponent 1-3

1.2.1. Identification of the Project 1-3

1.2.2. Project Proponent 1-3

1.2.3. Proposed Project 1-3

1.3 Brief Description of the Project 1-4

1.3.1. Nature of the Project 1-4

1.3.2. Size of the Project 1-4

1.3.3. Project Site Details 1-4

1.3.4 Importance of the Project 1-30

1.4 Scope of the Study 1-31

1.4.1 Administrative and Legislative Background 1-32

1.4.2 Study Area for EIA 1-32

1.4.3 Methodology of the Study 1-32

1.5 Contents of the Report 1-35

1.6 Status and Stage of Regulatory Framework 1-37

CHAPTER-2: PROJECT DESCRIPTION


2.2 Type of the Project 2-2

2.3 Need Of the Project 2-2

2.4 Typical Well site details 2-3



Rev. No. 02


TABLE OF CONTENTS

2.4.1 Size or Magnitude of Operation 2-4

2.4.2 Resource Requirement for the Project 2-5

2.4.2.1 Land Requirement 2-5

2.4.2.2 Water Requirement 2-5

2.4.2.3 Power Requirement 2-7

2.4.2.4 Drilling Mud 2-7

2.5 Proposed Schedule for the Project Approval and Implementation 2-8

2.6 Development Plan of the Project 2-8

2.6.1 Description of Drilling Rig 2-8

2.6.2 Wastes generated and their disposal 2-10

2.6.3 Abandonment and Restoration 2-10

2.7 Technology and Drilling Process Description 2-10

2.7.1 Drilling of Development well 2-17

2.8 Details of Project Utilities 2-20

2.8.1 Site Preparation 2-20

2.8.2 Approach Roads 2-20

2.8.3 Installation of Facilities 2-21

2.9 Post Drilling Operations - Abandonment and Restoration 2-26

2.9.1 Demobilization & Decommissioning 2-26

2.9.2 Restoration of Well Sites 2-26

2.9.3 Traffic Volumes 2-27

2.10 Sources of Pollution 2-27

2.10.1 General 2-27

2.10.2 Wastewater Generation and Disposal 2-28

2.10.3 Air Emissions 2-28

2.10.4 Solid Waste 2-29

2.10.4.1 Drilling Mud 2-29

2.10.4.2 Drill Cuttings 2-29

2.10.4.3.Waste Pit Details 2-30

2.10.4.4 Used/Spent Oil 2-30

2.10.4.5 Drilling Mud & Drill Cuttings Analysis 2-30



Rev. No. 02


TABLE OF CONTENTS

2.10.5 Noise Levels 2-31

2.11 Qualifications, Skills and Training Practice 2-31

CHAPTER-3: DESCRIPTION OF THE ENVIRONMENT

3.1 Baseline Environmental Study 3-2

3.2 Geology 3-3

3.3 Hydrology 3-4

3.3.1 Ground Water Resources 3-4

3.4 Seismicity and Floods 3-8

3.5 Land Environment 3-9

3.5.1 Topography 3-9

3.5.2 Land Use Studies 3-9

3.5.2.1 Methodology 3-9

3.6 Meteorology 3-13

3.6.1 Meteorological data recorded at study area 3-13

3.6.2 Secondary Data from Indian Meteorological Dept., (IMD), Ahmedabad 3-17

3.7 Ambient Air Quality 3-21

3.7.1 Selection of Sampling Locations 3-21

3.7.2 Frequency and Parameters for Sampling 3-23

3.7.3 Instruments used for Sampling 3-24

3.7.4 Sampling and Analytical Techniques 3-24

3.7.5 Ambient Air Quality Results 3-25

3.7.6 Summary of Ambient Air Quality Results 3-25

3.7.7 Observations 3-29

3.8 Noise Environment 3-35

3.8.1 Methodology for Noise Monitoring 3-35

3.8.2 Details of Noise Monitoring Locations & Presentations of Results 3-35


3.9 Water Quality Monitoring 3-58

3.9.1 Sampling and Analysis Techniques 3-58

3.9.2 Details of water Sampling Locations 3-58



Rev. No. 02


TABLE OF CONTENTS

3.9.3 Presentation of Results 3-62


3.10 Soil Quality Monitoring 3-102

3.10.1 Sampling and Analysis Techniques 3-102

3.10.2 Details of Soil Sampling Locations 3-102

3.10.3 Presentation of Results 3-104


3.11 Biological Environment 3-112

3.11.1 Introduction 3-112

3.11.2 Reconnaissance of study area 3-112

3.11.3 Assessment of Flora 3-113

3.11.4 Vegetation of Study Area 3-120

3.11.5 Assessment of Fauna 3-121

3.11.6 Aquatic Ecology 3-128

3.11.6.1 Sampling Procedure 3-128

3.11.6.2 Method of Analysis 3-128

3.11.6.3 Species Diversity 3-129

3.11.7 Conclusion 3-133

3.12 Socio-economic Environment 3-133

3.12.1 Baseline Status 3-134

3.12.2 Approach and Methodology 3-135

3.12.3 Demography 3-137

3.12.4 Literate Population 3-138

3.12.5 Urban/Rural Population 3-139

3.12.6 Social Structure 3-140

3.12.7 Occupational Structure 3-140

3.12.8 Infrastructure Facilities 3-141

3.12.8.1 Educational Facilities 3-141

3.12.8.2 Health Facilities in Rural Area 3-141

3.12.8.3 Drinking Water facility in the rural villages of the study area 3-141

3.12.8.4 Communication and Transport 3-142



Rev. No. 02


TABLE OF CONTENTS

3.12.8.5 Medical and Public Health facilities 3-142

3.12.8.6 Existing Health conditions& concerns 3-142

3.12.9 Public Consultation during primary survey 3-143

3.12.10 Salient observations of the study 3-144

3.12.11 Economic Profile 3-145

3.12.12 Cultural and Aesthetic attributes 3-147

3.12.13 Community Consultation 3-147

CHAPTER-4: ANTICIPATED ENVIRONMENTAL IMPACTS & MITIGATION MEASURES


4.2 Impact Assessment and Mitigation Measures 4-3

4.2.1 Air Environment 4-5

4.2.1.1 Potential Impacts 4-5

4.2.1.2 Fugitive Emissions 4-6

4.2.1.3 Air Pollution Modelling 4-6

4.2.1.4 Model Input Data 4-6

4.2.1.5 Presentation of Results 4-7

4.2.1.6 Mitigation measures 4-14

4.2.2 Noise Environment 4-15

4.2.2.1 Noise from the drilling rig 4-15

4.2.2.2 Mathematical model for sound wave propagation during operation 4-15

4.2.2.3 Input for the Model 4-16

4.2.2.4 Presentation of Results 4-16

4.2.2.5 Occupational Health Hazards from noise pollution 4-16

4.2.2.6 Community Noise Level 4-17

4.2.2.7 Noise emanated by Machineries and Equipment 4-18

4.2.2.8 Noise from Vehicular Traffic 4-18

4.2.2.9 Noise Control Measures 4-18

4.2.3 Water Environment 4-18

4.2.3.1 Sources of water Pollution 4-18



Rev. No. 02


TABLE OF CONTENTS

4.2.3.2 Potential surface and ground water impacts 4-19

4.2.3.3 Impact to surface water quality 4-19

4.2.3.4 Impact on ground water regime 4-20

4.2.4 Topography and Climate 4-21

4.2.4.1 Impact on Topography 4-21

4.2.4.2 Impact on Climate 4-21

4.2.5 Land Environment 4-21

4.2.5.1 Land required for drilling activity 4-22

4.2.5.2 Impact on soil quality 4-22

4.2.5.3 Soil Contamination 4-22

4.2.5.4 Localized Alteration of subsoil and overland drainage pattern 4-22

4.2.5.5 Alteration of soil quality by loss of topsoil 4-22

4.2.6 Biological Environment 4-23

4.2.6.1 Impact on Terrestrial Environment 4-24

4.2.6.2 Impact on Aquatic Environment 4-24

4.2.7 Socio-Economic Environment 4-25

4.2.7.1 Impact on civic amenities 4-26

4.2.7.2 Impact on health 4-26

4.2.7.3 Impact on social well being 4-26

4.2.7.4 Impact due to vehicular movement 4-26

4.2.7.5 Other impacts on resources and infrastructure 4-26

4.2.8 Environment Management Plan 4-27

4.2.8.1 Atmospheric Emissions 4-27

4.2.8.2 Noise Environment 4-28

4.2.8.3 Soil Erosion 4-28

4.2.8.4 Land Environment 4-28

4.2.8.5 Water Environment 4-28

4.2.8.6 Biological Environment 4-28

4.2.8.7 Socio-economic Environment 4-28

4.2.9 Environmental Measures during well construction 4-30

4.2.9.1 Management of Drilling Wastes 4-31



Rev. No. 02


TABLE OF CONTENTS

4.2.9.2 Management of Solid Wastes 4-32

4.2.9.3 Management of Discharge of aqueous Effluents 4-33

4.2.9.4 Management of waste disposal sites within drill site 4-33

4.2.10 Drilling Program Safety Guidelines 4-33

4.2.11 Monitoring Environmental Performance 4-34

4.2.12 Drilling Site Restoration Plan 4-34

4.2.13 Decommissioning upon abandonment 4-34

4.2.14 Occupational Health Surveillance Program 4-35

CHAPTER-5 ANALYSIS OF ALTERNATIVES (TECHNOLOGY & SITE)

5.1 Alternatives for Project Site 5-2

5.2 Alternatives for Technology 5-2

CHAPTER-6 ENVIRONMENTAL MONITORING PROGRAM

6.1 Environmental Monitoring and Reporting Procedure 6-2

6.1.1 Objective of monitoring 6-4

6.1.2 Monitoring Schedule 6-4

6.1.2.1 Ambient Air Quality & Meteorology 6-4

6.1.2.2 Water Quality 6-4

6.1.2.3 Noise Levels 6-5

6.2 Reporting Schedules Of The Monitoring Data 6-5

6.2.1 Air Quality and Meteorology 6-5

6.2.2 Water and waste water quality 6-6

6.2.3 Noise Levels 6-7

6.3 Audit and Review 6-7

CHAPTER-7: ADDITIONAL STUDIES

7.1 Risk Assessment 7-2

7.1.1 Approach to the Study 7-2

7.1.2 Maximum Credible Accident Analysis (MCAA) 7-2

7.1.3 Damage Effects of Various Heat Loads 7-7

7.1.4 Scenario Identification 7-8



Rev. No. 02


TABLE OF CONTENTS

7.1.5 Input Data for Consequence Analysis 7-8

7.1.6 Results and Discussion 7-10

7.1.7 Failure Frequency Analysis 7-10

7.1.8 Historical Data Sources 7-10

7.1.9 Probability of Immediate Ignition and Individual Risk Assessment Criteria 7-11

7.1.10 Individual Risk Assessment 7-11

7.1.11 Geo Hazards 7-12

7.2 Recommendations to mitigate blow out Risk / Hazards 7-12

7.3 Disaster Management Plan 7-13

7.3.1 Objectives of Disaster Management Plan 7-13

7.3.2 Different Phases of Disaster 7-14

7.3.2.1 Warning Phase 7-14

7.3.2.2 Period of Impact Phase 7-15

7.3.2.3 Rescue Phase 7-15

7.3.2.4 Relief Phase 7-16

7.3.2.5 Rehabilitation Phase 7-16

7.3.3 Key Elements of DMP 7-16

7.3.3.1 Basis of the Plan 7-16

7.3.3.2 Onsite Disaster Management Plan Purpose 7-16

7.3.3.3 Offsite Disaster Management Plan Purpose 7-17

7.3.4 Level of Emergencies 7-18

7.3.4.1 Minor Emergency 7-18

7.3.4.2 Major Emergency 7-20

7.3.5 Overall Philosophy of Emergency Response 7-21

7.3.6 Auditing 7-21

7.3.7 Emergency Priorities 7-21

7.3.8 Emergency Response Management Group Interfaces 7-22

7.3.9 Emergency Response Procedure 7-22

7.3.9.1 Minor Emergency 7-22

7.3.9.2 Major Emergency 7-22

7.3.9.3 Emergency Response Strategies 7-24



Rev. No. 02


TABLE OF CONTENTS

7.3.10 Alert Phase 7-25

7.3.11 Preparedness for Emergencies 7-25

7.3.12 Control of Emergencies 7-26

7.4 Emergency Response Action 7-26

7.5 Emergency Response Procedures 7-27

7.5.1 Blow Out 7-27

7.5.2 Well Control 7-30

7.5.3 Hydrogen Sulphide 7-31

7.5.4 Abandonment of Rig/well 7-32

7.5.5 Structural Damage/Failure of the Rig 7-33

7.5.6 Well Control Emergencies 7-34

7.5.7 Fire on Rig 7-36

7.5.8 Rig Evacuation 7-37

7.5.9 Gas Release on Rig 7-38

7.5.10 Structural Damage 7-39

7.5.11 Ground Movement 7-40

7.5.12 Un-Ignited Gas Release 7-41

7.5.13 Hydrocarbon Spill 7-42

7.5.14 Medical Evacuation 7-42

7.5.15 Criminal Acts 7-43

7.5.16 Bomb Threat/ Extortion 7-44

7.6 End of Emergency 7-45

7.7 Communications 7-46

7.7.1 Communication Network 7-46

7.8 Occupational Health & Safety Management Plan 7-46

CHAPTER-8: PROJECT BENEFITS

8.0 Project Benefits 8-2

8.1 Improvements in the Physical Infrastructure 8-2

8.2 Improvements in the Social Infrastructure 8-2



Rev. No. 02


TABLE OF CONTENTS

8.3 Employment Potential Other Tangible Benefits 8-3

CHAPTER-9: ENVIRONMENTAL COST BENEFIT ANALYSIS

9.1 Project Cost 9-2

9.2 Capital and Recurring Cost 9-2

9.3 Corporate Environment Responsibility 9-3

CHAPTER-10: ENVIRONMENT MANAGEMENT PLAN


10.2 EMP during Various Project Phases 10-2

10.3 Environmental Policy of the Company 10-3

10.4 Organisation Structure-HSE 10-3

10.5 EMP Plan for the Proposed Project 10-3

10.6 Environment Protection and Reclamation Plan 10-4

10.7 Environment Management Plan 10-5

10.7.1 Air Environment 10-5

10.7.2 Noise Environment 10-6

10.7.3 Water Environment 10-6

10.7.4 Biological Environment 10-7

10.7.5 Land Environment 10-7

10.7.6 Soil Environment 10-8

10.7.7 Storage and Handling of Materials and Spills 10-8

10.7.8 Social Management Plan 10-9

10.7.9 Corporate Environment Responsibility 10-11

ANNEXURES

I TOR Certificate 1-2

II Corporate HSE Policy 3

III Baseline Monitoring Standards 4-8

IV Air Monitoring data 9-26

V Calculation of Pool fire 27

VI Secondary data on Failure rate Frequency 28



Rev. No. 02


TABLE OF CONTENTS

List of Tables

Table No. Title Page No. 1.1 Brief Description of the Project 1-10

1.2 Details of Block Coordinates 1-12

1.3 Environmental Attributes and frequency of monitoring 1-33

2.1 Salient Features of the Proposed Project 2-4

2.2 Water Requirements for each well site 2-5

2.3 Details of DG sets 2-7

2.4 Drilling of 406 development wells in the producing oil fields of Mehsana Asset 2-9

2.5 Details of drilling rigs and facilities to be deployed 2-10

2.6 Wells Planned to be drilled in Plan period 2-14

2.7 Gas and Liquid handling capacity of different installations in 40 ML Blocks 2-15

3.1 Ground water levels in District 3-5

3.2 Land use classification and area of Mehsana, Ahmedabad, Patan and Gandhinagar districts

3-11

3.3 Summary of the meteorological data generated in study area 3-13

3.4 (a) Summary of wind pattern at Rupal 3-14

3.4 (b) Summary of Wind Pattern at Ahmedabad 3-14

3.5 Weather data from IMD Ahmedabad (1971-2000) 3-19

3.6 Details Of Ambient Air Quality Monitoring Locations 3-22

3.7 Techniques Used For Ambient Air Quality Monitoring 3-24

3.8 Summary of Ambient Air Quality Monitoring Results 3-27

3.9 Ambient Noise level Monitoring Locations & Results 3-37

3.10 Ground Water Sampling Locations 3-58

3.11 Surface Water Sampling Locations 3-59

3.12(a) Ground water Analysis Results 3-65

3.12(b) Ground water Analysis Results 3-67

3.12(c) Ground water Analysis Results 3-70

3.12(d) Ground water Analysis Results 3-73

3.13(a) Surface Water Analysis Results 3-76

3.13(b) Surface Water Analysis Results 3-79

3.13(c) Surface Water Analysis Results 3-82

3.13(d) Surface Water Analysis Results 3-84

3.13(e) Surface Water Analysis Results 3-87

3.13(f) Surface Water Analysis Results 3-90

3.13(g) Surface Water Analysis Results 3-93

3.13(h) Surface Water Analysis Results 3-96

3.14 Soil Sampling Location 3-102

3.15(a) Soil Analysis Results 3-104

3.15(b) Soil Analysis Results 3-105

3.15(c) Soil Analysis Results 3-106

3.15(d) Soil Analysis Results 3-108

3.16 List of flora in the study area 3-113

3.17 Fauna observed in the study area 3-124

3.18 List of Phytoplankton species found in the study area 3-131

3.19 List of Zooplankton species found in the study area 3-131

3.20 Shannon diversity index of Phytoplankton and Zooplankton 3-131

3.21 Description of tools employed for the Socio-economic Assessment 3-135

3.22 Potential Sources of Secondary data to validate the primary baseline data of EIA 3-148

4.1 Key Potential Impacts Of Exploration Activities 4-2

4.2 Impact Significance Criteria 4-3



Rev. No. 02


TABLE OF CONTENTS

4.3 Activities – Impacts/Risks Interaction Environmental Sensitivities 4-4

4.4 Details Of DG Sets 4-6

4.5 Emission Characteristics- Model Inputs 4-7

4.6(a) Predicted 24 Hourly Short Term Incremental Concentrations 4-10

4.7(a) Resultant Concentrations due to INCREMENTAL GLC's 4-10

4.6(b) Predicted 24 Hourly Short Term Incremental Concentrations 4-13

4.7(b) Resultant Concentrations due to INCREMENTAL GLC's 4-14

4.8 Input Data for Noise Modelling 4-16

4.9 Predicted Noise Levels 4-16

4.10 Noise Exposure Levels & its Effects 4-17

4.11 Summary Of Impact Assessment: Water Resources 4-20

4.12 Summary of Impact Assessment: Soil and Land Use 4-23

4.13 Summary of Impact Assessment Flora and Fauna 4-25

4.14 Prediction of Qualitative Impacts in Socio Economic Environment 4-29

4.15 Summary of Identified Impacts and Proposed Mitigation Measures 4-35

6.1 Environmental Monitoring plan 6-8

7.1 List Of Major Hazards 7-4

7.2 Occupational Hazards 7-4

7.3 Damage Due To Peak Over Pressure 7-8

7.4 Damage Due To Incident Radiation Intensities 7-8

7.5 Input Data For Consequence Analysis 7-10

7.6 Summary Of Consequence Analysis For Jet Fire Scenario At Well 7-11

7.7 Probability Of Ignition For Leaks Of Flammable Fluids 7-12

7.8 The Adnoc Individual Risk Assessment Criteria 7-12

7.9 Recommendations To Mitigate Blow Out Risk/Hazards 7-13

7.10 Emergency Operation Taskforce Functions 7-18

9.1 Project Cost 9-2

9.2 Capital and Recurring Cost for Pollution Control Measures 9-2

9.3 Fund Allocation for the CER 9-4

10.1 Fund Allocation for the CER 10-12

10.2 Summary Of Environmental Management Actions 10-14



Rev. No. 02


TABLE OF CONTENTS

List of Figures

Figure No.

Title Page No.

1.1 Index Map of the area 1-5

1.2 a Topographic Map of Block Locations 1-6

1.2 b Topographic Map of Block Locations 1-7

1.2 c Topographic Map of Block Locations 1-8

1.2 d Topographic Map of Block Locations 1-9

2.1 Water Balance of each well site 2-6

2.2 Drilling Rig Sketch 2-22

2.3 Drilling Fluid Circulation System At Typical Rig 2-28

2.4 Typical Section View Of Drilling Cut And Drill Mud Collection Pit 2-33

3.1 Ground Water Pre Monsoon Level map of Mehsana, Ahmedabad , Patan and Gandhinagar Districts

3-6

3.2 Ground Water Post Monsoon Level map of Mehsana, Ahmedabad , Patan and Gandhinagar Districts

3-7

3.3 Seismic Zone Map of India 3-8

3.4 Seismic Zone-III of Study Area 3-8

3.5 Land Use Pattern of Mehsana, Ahmedabad , Patan and Gandhinagar Districts 3-10

3.6(a) Wind rose Diagram For April-18, May -18, June 18 & July 18 At Rupal 3-15

3.6(b) Wind rose Diagram For April-27th , 2018 to July 27th 2018 At Rupal 3-15

3.6(c) Wind rose Diagram For April-18, May -18, June 18 & July 18 At Ahmedabad 3-16

3.6(d) Wind rose Diagram For April-27th , 2018 to July 27th 2018 At Ahmedabad 3-17

3.7(a) Wind rose Diagrams For The Month Of April, May, June & July - IMD, Ahmedabad(1971-2000)

3-18

3.7 (b) Annual Wind rose Diagrams from IMD, Ahmedabad (1971-2000) 3-16

3.8 Monthly average Maximum & Minimum Temperature in ºC 3-20

3.9 Monthly average Rainfall in mm & Relative humidity in % 3-20

3.10 Ambient Air Quality Monitoring Locations of the study area 3-25

3.11 Particulate Matter (PM10) of the sampling locations 3-29

3.12 Particulate Matter (PM2.5) of the sampling locations 3-30

3.13 Sulphur di oxide (SO2) of the sampling locations 3-31

3.14 Oxides of Nitrogen (NOx) of the sampling locations 3-32

3.15 Carbon monoxide (CO) of the sampling locations 3-33

3.16 Air monitoring Sampling Locations 3-34

3.17 Map Showing Noise Monitoring Stations 3-36

3.18 Noise Sampling Locations of the study area 3-57

3.19(a) Map Showing Ground Water Monitoring Stations 3-61

3.19(b) Map Showing Surface Water Monitoring Stations 3-62

3.20 Ground Water Sampling Locations 3-63

3.21 Surface Water Sampling Locations 3-64

3.22 Map Showing Soil Sampling Locations 3-104

3.23 Soil Texture Classification 3-110

3.24 Soil Sampling Location 3-111

3.25 Sampling Location of Ecology and biodiversity study area 3-113

3.26 Sampling of the study area 3-117

3.27 Vegetation of the study area 3-119



Rev. No. 02


TABLE OF CONTENTS

3.28 Mushrooms found in the study area 3-120

3.29 Avifauna in the study area 3-122

3.30 Common Myna found in the study area 3-123

3.31 Pond found in the study area 3-123

3.32 Nilgai found in the cotton crop field of study area 3-126

3.33 Orchards of pomegranate found in the study area 3-127

3.34 Cattle egret found in the study area 3-127

3.35 Aquatic sampling location of the study area 3-129

3.36 Shannon diversity Index of Planktons 3-133

3.37 Distribution of Population in the study area 3-138

3.38 Literacy rate of population in the study area 3-139

3.39 Social Structure of the study area 3-140

3.40 Socio-economic survey of the study area 3-144

3.41 Animal Husbandry of the study area 3-146

4.1 (a) Output Model – Particulate Matter (PM) 4-8

4.2(a) Output Model – Sulphur di oxide (SO2) 4-8

4.3 (a) Output Model – Nitrogen oxides (NOx) 4-9

4.4(a) Output Model – Carbon Monoxide 4-9

4.1 (b) Output Model – Particulate Matter (PM) 4-11

4.2(b) Output Model – Sulphur di oxide (SO2) 4-12

4.3 (b) Output Model – Nitrogen oxides (NOx) 4-12

4.4(b) Output Model – Carbon Monoxide 4-13

7.3 Flowchart For Evaluation Of Consequences During The Release Of Flammable Or Toxic Chemical

7-10

7.4 DMP Process Flow Diagram 7-16

7.5 Organizational Setup For The On-Site DMP 7-20

7.6 Organizational Setup For The Off-Site DMP 7-21

7.7 Emergency Classification 7-25

7.8 Contingency Plan For Onshore Blowout (Drilling Rig) 7-32

7.9 Typical Schematic Of Bop Stack 7-34

10.1 Plants Which Counteract Air Pollution (Odour Of Sulphur) 10-11



Rev. No. 02


Abbreviations & Glossary

i

ABBREVIATIONS

BLEVE Boiling Liquid Evaporating Vapour Explosion

BOD Biological Oxygen Demand

BOP Blow-out Preventer

CAGR Compounded Annual Growth Rate

CC&A Common Consent and Authorization (Consent to Operate (for water and air emissions) and Authorization (for management of hazardous wastes)

CGWA Central Ground Water Authority

COD Chemical Oxygen Demand

CPCB Central Pollution Control Board

DG Diesel Generator

DGH Directorate General of Hydrocarbons

DMP Disaster Management Plan

EC Environmental Clearance

ECC Emergency Control Centre

EHS Environmental Health and Safety

EIA Environmental Impact Assessment

EMP Environmental Management Plan

EOR Enhanced oil Recovery

FAE Functional Area Expert

GGS Group Gathering Stations

GLC Ground Level Concentration

GoI Government of India

GPCB Gujarat Pollution Control Board

HAZOP Hazard and Operability Study

HDPE High Density Polyethylene

HSD High Speed Diesel

HSE Health, Safety and Environment

IMD Indian Meteorological Department

INR Indian Rupees

KLD Kilo Litre per Day

LU Land Use

ML Mining Lease

MoEF Ministry of Environment and Forest

MSDS Material Safety Data Sheet

MSL Mean Sea Level

MT Metric Tonnes

NABET National Accreditation Board for Education and Training

NDT Non Destructive Testing

NMHC Non-Methane Hydrocarbons

NOC No-Object Certificates (Consent to Establish)

NOx Nitrogen Oxides

OOIP original oil in-place

ONGC Oil and Natural Gas Corporation Limited



Rev. No. 02



ii

OMR Oil Mines Regulation

PDCR Plan, Do, Check and Review

PEL Petroleum Exploration License

PM Particulate Matter

PPE Personal Protective Equipment

PSC Production Sharing Contract

SAR Sodium Absorption Ratio

SO2 Sulphur Dioxide

TDS Total Dissolved Solids

TSDF Treatment, Storage, and Disposal Facility

USEPA United States Environment Protection Agency

VOCs Volatile Organic Compounds



Rev. No. 02



iii

GLOSSARY

ABANDONED WELL: A dry hole in which no producible oil or gas was present, or a well that has stopped

producing. Abandoned wells must be plugged to prevent seepage of oil, gas, or water from one formation

to another.

ACCIDENT: An accident may be defined as ’an undesirable and unplanned event with or without or major

or minor damage consequence to life and/or property.’

ACTIVE WELL: A well in mechanical condition for production or service use (i.e., in active production or

service use).

API: It is the short form of American Petroleum Institute. It is the oil industry’s trade organization. API’s

research and engineering work provides a basis for establishing operating and safety standard issues;

specifications for the manufacturing of oil field equipment; and furnishes statistical and other information

to related agencies.

ASSOCIATED GAS: Gas combined with oil or dissolved in crude oil. Known also as cap gas and solution

gas, it provides the drive mechanism needed to force oil to the surface of a well. Associated gas is

normally present in an oil reservoir in the early stages of production.

BARREL: The standard unit of measure of liquids in the petroleum industry. It is equivalent to 42 U.S.

standard gallons or 159 litres of oil.

BARREL OF OIL EQUIVALENT (BOE): The amount of energy resource that is equal to one barrel of oil

on an energy basis. The conversion is based on the assumption that one barrel of oil produces the same

amount of energy when burned as 5,620 cubic feet of natural gas.

BASIN: A depression of the earth’s surface into which sediments are deposited, usually characterized

by sediment accumulation over a long interval; a broad area of the earth beneath which layers of rock

are inclined, usually from the sides toward the centre.

BED: A layer of rock, usually sediments, which is homogeneous (the same) in composition. One bed is

separated from another by a bedding plane.



Rev. No. 02



iv

BID: An offer for a lease submitted by a potential lessee in the form of a cash bonus dollar amount or

other commitments as specified in the final notice of sale.

BLEVE: (BOILING LIQUID EXPANDING VAPOUR EXPLOSION): This is a type of explosion that can

occur when a vessel containing a pressurized liquid is ruptured. Such explosions can be extremely

hazardous.

BLOWOUT: An uncontrolled flow of gas, oil, or other fluids from a well to the atmosphere. A well may

blow out when formation pressure exceeds the pressure overburden of a column of drilling fluid.

BLOWOUT PREVENTER: A special assembly of heavy-duty valves, commonly called the BOP stack,

installed on top of a well which can be closed to prevent high-pressure oil or gas from escaping (a

blowout) from the well hole during drilling operations.

BOREHOLE: The hole in the earth made by the drill; the uncased drill hole from the surface to the bottom

of the well.

CASING: Steel pipe used in oil wells to seal off fluids in the rocks from the bore hole and to prevent the

walls of the hole from caving.

CASING HEAD: The top of the casing set in a well; the part of the casing that protrudes above the surface

and to which the control valves and flow pipes are attached.

CASING HEAD GAS: Gas produced from an oil well as distinguished from gas from a gas well. The

casing head gas is taken off at the top of the well or at the separator.

COMMERCIAL WELL: A well of sufficient net production that it could be expected to pay out in a

reasonable time and yield a profit from the operation.

COMPLETED WELL: A well that has been mechanically completed for production or service use. There

may be more than one completed zone in the well.

CONDENSATE: A natural gas with a low vapour pressure compared with natural gasoline and liquefied

petroleum gas. It is produced from a deep well where the temperature and pressure are high. Gas



Rev. No. 02



v

condenses as it rises up the well bore and reaches the surface as condensate. Similarly, condensate

separates out naturally in pipelines or in a separation plant by the normal process of condensation.

DEVELOPMENT: Activities following exploration including the installation of facilities and the drilling and

completion of wells for production purposes.

DIRECTIONAL DRILLING: The technique of drilling at an angle from the vertical by deflecting the drill

bit. Directional wells are drilled to develop an offshore lease from one drilling platform; to reach a pay

zone where drilling cannot be done, such as beneath a shipping lane.

DISASTER: Is a catastrophic consequence of a major emergency/accident that leads to, not only

extensive damage to life and property but also disrupts all normal human activity for a long time and

requires a major national and international effort for rescue and rehabilitation of those affected.

DISCOVERY: A find of significant quantity of gas or oil.

DRILL CUTTINGS: Chips and small fragments of drilled rock that are brought to the surface by the flow

of the drilling mud as it is circulated.

DRILL PIPE: Heavy, thick walled, hollow steel pipe used in rotary drilling to turn the drill bit and to provide

a conduit for the drilling mud.

DRILLING CONTRACTOR: A person or company whose business is drilling wells. Wells are drilled on

several contract specifications: per foot, day rate, or turnkey (that is, upon completion). Most major oil

companies do not own drilling rigs. Exploration and development drilling is contracted. Personnel

manning the rigs work for the contractor.

DRILLING MUD: A special mixture of clay, water, or refined oil, and chemical additives pumped down

through the drill pipe and drill bit. The mud cools the rapidly rotating bit; lubricates the drill pipe as it turns

in the well bore; carries rock cuttings to the surface; serves as a plaster to prevent the wall of the borehole

from crumbling or collapsing; and provides the weight or hydrostatic head to prevent extraneous fluids

from entering the well bore and to control down hole pressures that may be encountered.

DRY HOLE: A well drilled to a certain depth without finding commercially exploitable hydrocarbons.



Rev. No. 02



vi

DRY GAS: Natural gas from the well that is free of liquid hydrocarbons; gas that has been treated to

remove all liquids; pipeline gas.

EMERGENCY: Is a situation of process deviation that if uncontrolled may lead to a major

accident/disaster with potential short term and/or long term risk damage consequence to life and property

in and/or around the facility.

ENVIRONMENTAL IMPACT ASSESSMENT: A statement required under the Environmental Impact

Assessment Notification, 2006 or similar regulations by other bodies in relation to any action significantly

affecting the environment, including certain exploration and drilling activities.

EXPLORATION: The process of searching for minerals preliminary to development. Exploration activities

include (1) geophysical surveys, (2) drilling to locate an oil or gas reservoir, and (3) the drilling of additional

wells after a discovery to delineate a reservoir. It enables the lessee to determine whether to proceed

with development and production.

EXPLOSION: An explosion is a sudden increase in volume and release of energy in an extreme manner,

usually with the generation of high temperatures and the release of gases.

FIELD: A geographical area in which one or more oil or gas wells produce. A field may refer to surface

area only or to underground productive formation. A single field may include several reservoirs separated

either horizontally or vertically.

FIREBALL: The burning of a flammable gas cloud on being immediately ignited at the edge before

forming a flammable/explosive mixture.

FLAMMABLE LIMIT: Flammable limits refer to the conditions under which a mixture of a flammable

material and air may catch fire or explode. When vapour s of a flammable or combustible liquid are mixed

with air in the proper proportions in the presence of a source of ignition, rapid combustion or an explosion

can occur. The proper proportion is called the flammable range and is also often referred to as the

explosive range. The flammable range includes all concentrations of flammable vapour or gas in air, in

which a flash will occur or a flame will travel if the mixture is ignited.

FLASH FIRE: A flammable gas release getting ignited at the farthest edge resulting in flash-back fire.



Rev. No. 02



vii

Gas Lost: Natural gas which is flared or vented (i.e., natural gas not retained in the production system

for sale or use).

HAZARD: Is the potential of an Accident.

INCIDENT: Is an emergent situation of any critical deviation in the process control or otherwise that may

lead to a major accident/potential emergency and disaster.

LEASE: A legal document executed between a landowner (as lessor) and a company or individual (as

lessee) that conveys the right to exploit the premises for minerals or other products for a specified period

of time over a given area.

INJURY ZONE: Zone of injury in any hazardous event.

MAJOR ACCIDENT HAZARD (MAH) INDUSTRY: If the quantity of any chemical as listed in MSIHC

Rules’ Schedule-2 or Schedule-3 is equal to or greater than the Threshold Quantity given therein.

MAJOR ACCIDENT: Loss of life or 10 or more injuries on-site or 1 or more injuries off-site (as defined in

MSIHC Rules).

OIL LOST: Oil that is spilled or burned (i.e., oil not retained in the production system for sale).

OPERATOR: The individual, partnership, firm, or corporation having control or management of

operations on a leased area or a portion thereof. The operator may be a lessee, designated agent of the

lessee, holder of rights under an approved operation agreement, or an agent of an operating rights holder.

PLUGGED AND ABANDONED: Wells in which casings have been removed, and the well bore sealed

with mechanical or cement plugs.

PLUMES: Plumes are continuous release of hazardous gases and vapours. Smoke from a chimney is

an example. Plumes can cause Fires and Explosions as secondary scenarios, in case the gases are

flammable & ignition occurs.

PRODUCIBLE LEASE: A lease where one well or several wells have discovered hydrocarbons in paying

quantities, but for which there is no production during the reporting period.



Rev. No. 02



viii

PRODUCIBLE ZONE COMPLETION: The interval in a well bore that has been mechanically prepared

to produce oil, gas or sulphur. There can be more than one zone completed for production in a well bore.

PRODUCING LEASE: A lease that is producing oil, gas, or sulphur in quantities sufficient to generate

royalties.

PRODUCTION: The phase of oil and gas operations involved with well fluids extraction, separation,

treatment, measurement, etc.

PROVEN RESERVES (SOCIETY OF PETROLEUM ENGINEERS): Reserves that can be estimated with

reasonable certainty to be recovered under current economic conditions. Current economic conditions

include processing costs prevailing at the time of the estimate. Proved reserves must either have facilities

that are operational at the time of the estimate to process and transport those reserves to market, or a

commitment of reasonable expectation to install such facilities in the future. Proved reserves can be

subdivided into undeveloped and developed Reserves.

PUFFS: Puffs are instantaneous release of hazardous gases and vapours. Puffs can give rise to FIRE

BALLS and vapour cloud explosions (VCE). A special case of vapour cloud explosion is the Boiling Liquid

Evaporating Vapour Explosion (BLEVE).

RENT: Periodic payments made by the holder of a lease, during the primary lease term for the right to

use the land or resources for purposes established in the lease.

ROYALTY: Payment, in value (money) or in kind, of a stated proportionate interest in production from

mineral deposits by the lessees to the Government.

SALES VALUE: The proceeds received for the sale of the mineral.

SERVICE ZONE COMPLETION: The interval in a well bore that has been mechanically prepared for

service use, usually water or gas injection to stimulate production from other wells or for water or other

waste disposal.

SESMIC SURVEY: The seismic survey is one form of geophysical survey that aims at measuring the

earth’s (geo-) properties by means of physical (-physics) principles such as magnetic, electric,

gravitational, thermal, and elastic theories



Rev. No. 02



ix

SPILLS: Spills are liquid pools created by leaking liquid chemicals. Spills may cause evaporation and

dispersal of toxic gases and if the spilled liquid is flammable, then it can catch fire creating a pool fire, or

the vapour can cause explosion.

SUSPENDED WELL: A well on which operations have been discontinued. The usual context is an

uncompleted well in which operations ceased during drilling but which has not been plugged and

abandoned permanently.

UPPER EXPLOSIVE LIMIT (UEL)/ UPPER FLAMMABILE LIMIT (UFL): Upper flammable limit (UEL) or

the upper explosive limit is the maximum concentration of vapour or gas in air below which propagation

of flame does not occur on contact with a source of ignition. The mixture is said to be too rich.

LOWER EXPLOSIVE LIMIT (LEL)/ LOWER FLAMMABILE LIMIT (LFL): Lower flammable limit (LEL)

or the lower explosive limit is the minimum concentration of vapour or gas in air above which propagation

of flame does not occur on contact with a source of ignition. The mixture is said to be too lean.

VCE: (VAPOUR CLOUD EXPLOSION); Explosion resulting from vapour clouds formed from flashing

liquids or non-flashing liquids and gases. Sometimes also referred to as unconfined vapour cloud

explosion.

VULNERABILITY ZONE: Zone of Exposure leading to Fatality or recoverable injury in any hazardous

event.

WELL: A hole drilled or bored into the earth, usually cased with metal pipe, for the production of gas or

oil. A hole for the injection under pressure of water or gas into a subsurface rock formation.



Rev. No. 02


ToR Compliance

x

Point wise compliance of TOR for the onshore Development and Production of Oil and Gas from 406 wells in 40 ML Blocks of District Mehsana, Ahmedabad, Patan and Gandhinagar, Gujarat.

Sl. No Terms of Reference Status

1 No of exploratory wells for which environment clearance is accorded and number of new wells proposed during expansion. Status and number of wells which are completed and closed

The project is new. ONGC proposes drilling of 406 new developments wells in Mehsana Asset

2 Recommendation of SCZMA/CRZ as per CRZ notification dated 6th January 2011 (if applicable)

Not Applicable

3 Details of support and infrastructure and vessel in the study are

Details given in section 3.12.8 on page no 141 to 143 of chapter 3

Standard TORs

1. Executive summary of a project.

Executive Summary has been enclosed given in EIA report., page number from i to xix

2.

Project description, project objectives and project benefits.

Project description is given in Chapter-2 from page number 1 to 33 of chapter 2), project objectives are given in section-2.3 of Chapter-2 on page number 2 of chapter 2, & in section 1.2.1 in chapter 1 on page no 3 of Chapter 1.and benefits of the project are given in Chapter-8.on page 8-1 to 8-3

3.

Cost of Project and Period of completion

The total estimated cost of the proposed Project

is 2402.83 crores.

The implementation schedule for the proposed project will be approximately 3-4 months from date of EC.

4. Site details within 1 km of the each proposed well, any habitation, any other installation/activity, flora and fauna, approachability to site, other activities including agriculture/land, satellite imagery for 10 km area. All the geological details shall be mentioned in the Topo sheet of 1:40000 scale, superimposing the well locations and other structures of the projects. Topography of the project site.

Brief description of proposed Project is given in Table-1.1 (page 10 to 12 of chapter 1). The Topographic maps are shown attached in Chapter-1. (between page 5 to 10 of chapter 1) Flora and fauna details are given in Section-3.11 of Chapter-3 from page 112 to 134 of chapter 3 Land use pattern is given in in Table 3.2 of Chapter 3 on page no 11 to 12 of Chapter 3

5. Details of sensitive areas such as National Park, Wildlife sanctuary and any other eco-sensitive area along with map indicating distance.

No Eco-sensitive Zone found in the study area



Rev. No. 02


ToR Compliance

xi

6. Approval for the forest land from the State/Central Govt. under Forest (Conservation) Act, 1980, if applicable.

No Forest Area found in the Study Area

7. Recommendation of SCZMA/CRZ clearance as per CRZ Notification dated 6th January, 2011 ( if applicable).

Not Applicable

8. Distance from nearby critically/severely polluted area as per Notification, if applicable. Status of moratorium imposed on the area.

Nil

9. Does proposal involve rehabilitation and resettlement? If yes, details thereof

No

10.

Environmental considerations in the selection of the drilling locations for which environmental clearance is being sought. Present any analysis suggested for minimizing the foot print giving details of drilling and development options considered.

Details are given in Section 2.4.2 of Chapter-2 from page number 4 to page no 7 of chapter 2

11. Baseline data collection for air, water and soil for one season leaving the monsoon season in an area of 10 km radius with center of Oil Field as its center covering the area of all proposed drilling wells.

The baseline studies were carried out from 27th April 2018 to 27th July 2018 representing Pre-monsoon Summer season. Details are given in Chapter-3 of EIA report. From page no 1 to 148 of chapter 3.

12. Climatology and Meteorology including wind speed, wind direction, temperature rainfall relative humidity etc.

Climatology and Meteorological details are given in Section-3.6 of Chapter-3. From page no 13 to page no 20 of chapter 3.

13. Details of Ambient Air Quality monitoring at 8 locations for PM2.5, PM10, SO2, NOx, CO, VOCs, Methane and non-methane HC.

Results of Ambient Air Quality monitoring are given in Table -3.8 of Chapter-3 on page number 27 to 33 of chapter 3..

14. Soil sample analysis (physical and chemical properties) at the areas located at 5 locations.

Details of Soil Sampling analysis are given in Section-3.10.3 of Chapter-3.from page no 104 to 110 of chapter 3.

15. Ground and surface water quality in the vicinity of the proposed wells site.

Surface water and ground water quality have been monitored and results are given in Section 3.9 of Chapter-3.from page no 58 to 101 of chapter 3.

16. Measurement of Noise levels within 1 km radius of the proposed wells.

Noise level survey results are given in Section-3.8 of Chapter-3.from page no 35 to 57 of Chapter 3.

17. Vegetation and land use; flora/fauna in the block area with details of endangered species, if any

Flora and fauna details are given in Section-3.11 of Chapter-3 from page 112 to 134 of chapter 3.

18. Incremental GLC as a result of DG set operation, flaring etc

Incremental GLC concentration results are mentioned in Section 4.2.1.3 of Chapter-4.from page no 6 to 10 of chapter 4.

19. Potential environmental impact envisaged during various stages of project activities

Impact assessment and mitigation measures for the stage wise proposed project activities are



Rev. No. 02


ToR Compliance

xii

such as site activation, development, operation/ maintenance and decommissioning.

given in Chapter-4. In Table 4.3 on page no 4 of chapter 4.

20.

Actual source of water and 'Permission' for the drawl of water from the Competent Authority. Detailed water balance, wastewater generation and discharge.

The water requirement will be met from the local sources through ONGC Installations. Water requirement given in Section-2.4.2.2 of Chapter-2 on page number 5 and 6 of chapter 2. Waste water generation details and mode of treatment are given in Section-2.6.2 of Chapter-2 on page number 10 of Chapter 2.

21. Noise abatement measures and measures to minimize disturbance due to light and visual intrusions.

Noise control measures are given in Section-4.2.2 of Chapter-4 on page number 15 to 18 of chapter 4.

22. Details on wastewater generation, treatment and utilization /discharge for produced water/ formation water, cooling waters, other wastewaters, etc. during all project phases.

Wastewater generation details and mode of treatment are given in Section-2.6.2 of Chapter-2 on page number 10 of Chapter 2 and Section-4.2.9.3 of Chapter-4 on page number 33 of chapter 4.

23. Details on solid waste management for drill cuttings, drilling mud and oil sludge, produced sand, radioactive materials, other hazardous materials, etc. including its disposal options during all project phases.

Solid waste management details are given in Section-4.2.9.2 of Chapter-4 on page number 32 of chapter 4.

24. Disposal of spent oil and lube

Management of used oil details are given in Section-2.10.4.4 of Chapter-2 on page number 30 of chapter 2.

25. Storage of chemicals and diesel at site. Hazardous material usage, storage and accounting.

Details for storage of chemicals are given in Section-2.8.3 of Chapter-2 on page number 21 of chapter 2.

26. Commitment for the use of water based mud (WBM) only

Water Based Mud (WBM) waste from drilling details are given in Section-4.2.9.1 of Chapter-4 on page number 32 of chapter 4.

27. Oil spill emergency plans for recovery/ reclamation.

Oil spill emergency plan is given in Section-7.5.13 of Chapter-7 on page number 41 of chapter 7.

28. H2S emissions control.

H2S emission control details are given in Section-7.5.3 of Chapter-7 on page number 31 of chapter 7.

29. Produced oil/gas handling, processing and storage/transportation.

Development Drilling no production at this stage

30. Details of control of air, water and noise pollution during production phase.

Not applicable

31.

Measures to protect ground water and shallow aquifers from contamination.

Mitigation Measures to protect ground water and surface water are given in Section-4.2.3.3 & Section-4.2.3.4 of Chapter-4 on page number 19 and 20 of chapter 4 and Table 4.15 on page 35 of chapter 4.



Rev. No. 02


ToR Compliance

xiii

32. Whether any burn pits being utilized for well test operations.

Nil

33.

Risk assessment and disaster management plan for independent reviews of well-designed construction etc. for prevention of blow out. Blowout preventer installation.

Risk and disaster management plan details are given in Section-7.2 on page number 2 of chapter 7 and Section-7.4 on page no 13 of Chapter-7. Blow out emergency Response procedure details are given in Section -7.5.1 on page no 27 of chapter 7

34. Environmental management plan

EMP details are given in chapter-10 on page 1 to 20 of Chapter 10

35.

Total capital and recurring cost for environmental control measures.

The estimated cost of the proposed exploration well drilling is Rs. 2402.83 crores. The cost for environmental control measures has been included in the total project cost. Details are given in Table 9.1 on page no 2 of Chapter-9.

36. Emergency preparedness plan.

Details of emergency Preparedness Plan is given in Section-7.4, 7.5, 7.6 & 7.7 from page no 26 to 46 of Chapter-7

37. Decommissioning and restoration plans.

Details of decommissioning and restoration plans section-2.9.2 on page no 26 of chapter-2.

38. Documentary proof of membership of common disposal facilities, if any

Membership of common disposal facilities are attached at the end of the report.

39. Details of environmental and safety related documentation within the company including documentation and proposed occupational health and safety Surveillance Safety Programme for all personnel at site. This shall also include monitoring programme for the environmental.

Occupational health and safety details are mentioned in Section 7.8 on page no 46 of Chapter-7.

40. A copy of Corporate Environment Policy of the company as per the Ministry's O.M. No. J-11013/ 41/2006-IA. II (I) dated 26th April, 2011 available on the Ministry's website.

Corporate Environment Policy of ONGC as shown in Annexure-II on page no 3 of Annexures

41. Any litigation pending against the project and or any direction/order passed by any court of law against the project. If so details thereof.

Nil

Onshore Development and Production of Oil and Gas from 406 wells in 40 ML Blocks of Districts Mehsana, Ahmedabad, Patan and Gandhinagar, Gujarat

Doc. No. ONGC/CHSE/EIA/MEH-Asset/2018-19/01

Rev. No. 02


Executive Summary

i

1.0 EXECUTIVE SUMMARY

Oil and Natural Gas Corporation Limited (ONGC) proposes to carryout onshore Development and

Production of oil & gas in 406 wells in 40 ML Blocks of Mehsana Asset in Districts Mehsana, Ahmedabad,

Patan and Gandhinagar of Gujarat state. As per the Environment Impact Assessment (EIA) Notification

dated 14th September 2006, the proposed project falls under ‘Category A’ of Activity Type 1(b) requires

prior Environmental Clearance (EC) to be obtained from MoEF&CC before the commencement of ground

activity. The application for prior EC (Form-1 and Pre-feasibility Report) for the Development and

Production of oil and gas in 406 wells (Onshore) 40 ML Blocks of Mehsana Asset has been submitted to

MoEF&CC on 21st November and Terms of Reference (TOR) has been issued by MoEF&CC vide letter

F. No. IA-J-11011/352/2016-IA-II (I) and Proposal No. IA/GJ/IND2/60533/2016 dated 21st November,

2016.

2.0 Details of the Project

ONGC proposes onshore development and production of 406 wells of oil & gas in 40 blocks in Mehsana,

Ahmedabad, Patan and Gandhinagar Districts, Gujarat. The salient features of the project are given in

Table- 1. The blocks details are given in Table-1

Table 1: Salient Features of the project

S.No. Particulars Details 1.

Name of the Project 406 development wells of oil & gas in 40

blocks in Mehsana, Ahmedabad, Patan and Gandhinagar districts in Gujarat

2. Location 40 blocks in Mehsana Asset

3 Name of Blocks Becharaji ML-37.110 sq. km ; Balol Ext. I ML 5.83 sq. km. Balol ML 24.004 sq. km. Charada and Mansa ML 187.5 sq. km. Charada ML 10.0 sq. km. Chanasma ML 2.813 sq. km. Dedana ML 5.44 sq. km. East Sobhasan ML 22.42 sq. km. Geratpura ML 21.6 sq. km. Jakasana ML 9.80 sq. km.



Rev. No. 02


Executive Summary

ii

Jotana Ext-I ML-57.70 sq. km ; Jotana Ext-II ML-0.870 sq. km ; Jotana ML-39.50 sq. km ; Jotana South ML-23.0 sq. km ; Warosan ML-38.050 sq. km ; Kadi-Ajol ML- 0.72 sq. km; Kadi ML 64.49 sq. km ; Langhnaj-Wadasma ML 13.84 sq. km ; Linch Ext – I ML 34.25 sq. km ; Linch Ext – II ML 13.35 sq. km ; Linch ML 43.73 sq. km ; Langhnaj ML 12.92 sq. km ; Lanwa Ext-1 ML 2.148 sq. km ; Lanwa ML 30.0 sq. km ; Mehsana City Ext-II 7.58 sq. km ; Mehsana City 8.85 sq. km ; Mansa Ext-I 12.50 sq. km ; Mansa 58.72 sq. km ; North Sobhasan (Part A&B) 12.048 sq. km ; North Sobhasan Ext I 56.85 sq. km ; Nandasan Langnaj ML 61.90 sq. km ; Nandasan Ext-I ML 26.387 sq. km ; Patan ML 13.619 sq. km ; Sobhasan ML 36.893 sq. km ; Sanganpur ML 6.970 sq. km ; Sathal ML 19.16 sq. km ; West Mevad ML 13.203 sq. km ; West Sobhasan ML 9.606 sq. km ; North Kadi Ext ML 61.43 sq. km ; North Sobhasan Ext-II 23sq.km.

4. District Mehsana, Patan, Ahmedabad and Gandhinagar

5. State Gujarat

6. Survey of India Topo sheet No. 46A-3, 46A-6, 46A-11, 46A-11

7. Total Area of the Project 1114.006 sq. km

8. Total Cost of the Project 2402.83 Crores

9. Nearest railway station along with distance in kms

Mehsana, 04 km



Rev. No. 02


Executive Summary

iii

10. Nearest airport along with distance in kms

Ahmedabad, 60 km

11. Protected areas as per Wildlife Protection Act,1972 (Tiger reserve, Elephant reserve, Biospheres, National parks, Wildlife sanctuaries, community reserves and conservation reserves)

Not found in the study area

12. Reserved / Protected Forests Not found in the study area

13. Seismicity Zone Zone-III

1.2 Importance of the Proposed Project

India is not among the major producers of crude oil, as it does not have much oil reserves. Therefore,

India depends on imports of crude oil from other countries. There is a heavy imbalance between oil

production and consumption in India. The Indian government is encouraging development and production

of oil and gas to a great extent. This would primarily allow India to tap its own resources there by reducing

its import bill. Discovery of viable hydrocarbon reserves in the state can boost the state’s economic

development to a great extent. The proposed project is therefore immensely significant for the state and

nation.

1.3 Project details

The onshore development and production of oil & gas in the delineated area selected through seismic

survey to identify and establish hydrocarbon potential. The site will be sized to contain all equipment and

temporary camps, storage, workshops, etc. using distances between various rig components in line with

existing rules and regulations for the area of operation and the approved standard operating procedures

of the drilling contractor. Within the above constraints, the site shall be sized to minimize environmental

impact. The approximate area of well site is dependent on the type of drilling equipment deployed, which

in turn is dictated by the planned depth of drilling.

1.4 Manpower Arrangement



Rev. No. 02


Executive Summary

iv

During the drilling operations, about 10 to 12 persons may be working in 8/12 hour shifts at site. Workers

will be able to return to their camp/homes during duty – off period. Once drilling is over no person is

required at site, except security cover through a contractor.

1.5 Land Requirement

ONGC shall acquire the land approx. 110m x 110m per well on temporarily basis for the purpose of

preparation of the drill site and drilling operations. The site may require temporary approach road from

an existing one for transportation of rig and other equipment necessary for drilling work. The site shall be

fenced in the event the well is successful. The well site shall be reduced to approximately 30m x 30m for

the production phase and all non-essential areas shall be fully reclaimed as per ONGC’s restoration policy

and land handed over to the land owner.

1.6 Power Requirement

During drilling operations, diesel engines shall be utilized as prime movers for meeting the power required

to run the drilling rig, circulation system etc. A power generator shall also be installed for lighting. The

capacity of the diesel engines that shall be used for operating the rig and the circulation system is

expected to be of 1250KVA (3 Nos, two running and one standby), which will be run by High Speed

Diesel. This generator shall consume approximately 2.5 to 3 KLD of fuel per day, when in operation.

1.7 Water Requirement

The most significant requirement of water for drilling activities is for mud preparation. The other

requirement would be for engine cooling, floor / equipment / string washing, sanitation, fire-fighting

storage / make-up and drinking. During the drilling activity, about 25 m3 per day water will be required

which will include requirements for operation and that for sanitation and drinking of the workers during

drilling single well. The water shall be made available from the nearest ONGC installation, and will be

transported by water tanker. A water pit of approx.100 m3 capacity will be constructed at the site for the

purpose of fire fighting.



Rev. No. 02


Executive Summary

v

2.0 Baseline Environmental Status

Environmental monitoring has been carried within the entire 40 blocks for onshore Development of oil &

gas in Mehsana, Ahmedabad, Patan and Gandhinagar districts, Gujarat. The baseline carried out during

summer season (27th April to 27th July 2018).

2.1 Land Use Studies

The land use pattern of the proposed project has been studied by District Census Hand Books and satellite

images. In Mehsana district the land use pattern of the study area indicates built-up land of 2.69%, land

under agriculture is about 88.55%, forest land is about 1.7%, waste land is about 4.55% and water bodies

contribute about 2.52% in the study area. In Ahmedabad district the land use pattern of the study area

indicates built-up land of 4.41%, land under agriculture is about 79.65%, waste land is about 7.35% and

water bodies contribute about 8.59% in the study area. In Patan district the land use pattern of the study

area indicates built-up land of 1.37%, land under agriculture is about 85.88%, waste land is about 8.75%

and water bodies contribute about 3.96% in the study area. In Gandhinagar district the land use pattern

of the study area indicates built-up land of 6.26%, land under agriculture is about 84.81%, waste land is

about 6.6% and water bodies contribute about 2.33% in the study area.

2.2 Soil Quality

The soil samples were tested at 20 locations covering various land uses. It has been observed that the

pH of the soil is ranging from 6.49 to 7.48. Moisture found in the range from 0.86 to 5.14%. Conductivity

of the soil ranges from 0.078 to 0.809 mS/cm. Texture of the soil in the selected locations of study area

were observed to be Clay and Silty Clay in nature. The potassium content varies from 914 to 3649 kg/ha.

Exchangeable Sodium content varies from 1.66 to 10.7 m.eq/100g. Exchangeable calcium and

Exchangeable magnesium were found in the range between 2.9 to 154 m.eq/100g & 6.84 to 14.8

m.eq/100g respectively. The infiltration rate of the soil depends on the soil texture of the area. Soil texture

depends on the relative proportion of Sand, Silt and Clay. In Mehsana, Ahmedabad and Gandhinagar

districts predominant soil group is of Loamy soil. It has been observed that infiltration rate in the loamy



Rev. No. 02


Executive Summary

vi

soil is high. The soils in the Patan district are generally sandy loam type with grey to brown color. They

are generally deep and have moderate to good permeability and drain ability. In the western part of the

district the soils are alkali type and saline. They are typically deep, grey, calcareous sandy loam of very

low permeability.

Meteorology

On-site monitoring was undertaken for various meteorological variables in order to generate the site-

specific data. The data generated is then compared with the meteorological data generated by nearest

India Meteorological Department (IMD) stations, located at Ahmedabad.

Meteorological data shows that mean average wind speed during study period are 1.675 m/s while wind

blows from SW direction and Average maximum temperature 39.05°C and minimum temperature 27.5°C

The mean average of maximum relative humidity recorded was 75.5% while mean minimum of 43%.

2.4 Ambient Air Quality

To establish the baseline status of the ambient air quality in the study area, the air quality was monitored

at 30 locations. Out of the 30 locations the minimum and maximum concentration for PM10 ranges between

40.9 and 80.4 g/m3 which are well within the NAAQ standards i.e. 100 g/m3. The minimum and maximum

concentration PM2.5 varies between 18.6 to 45.1 g/m3 respectively during the study period which are well

within the NAAQ standards i.e. 60 g/m3. The concentrations of SO2 ranges between 5.1 to 14.1 g/m 3

which are well within the NAAQ standards i.e. 80 g/m3.The concentrations of NOx were varied between

5.7 to 31.6 g/m3 respectively which are well within the NAAQ standard i.e. 80 g/m3. CO were observed

to be in the range of 0.10 mg/m3 to 0.40 mg/m3. Methane hydrocarbon (CH4 HC) was observed to be below

the detection limit of 0.1 g/m3. Non-methane hydrocarbon (Non-CH4 HC) was observed to be below the

detection limit of 0.1 g/m3. From the analysis of the monitored data, it infers that the air quality levels in

the study area are of fairly good quality and comply with the National Ambient Air Quality Standards

(NAAQ).



Rev. No. 02


Executive Summary

vii

2.5 Ambient Noise Level

The noise monitoring has been conducted at 360 locations, covering residential, commercial and silence

zones in the study area.

Day Time: Noise levels during day time were found to be in the average range of 47.9 to 55.7 dB (A).

The maximum noise level was observed as 55.7 dB (A) at Palwasana Part (N69) and a minimum of 47.9

dB (A) was observed at Near Mahakali Dham Akba ( N1).

Night time: Noise levels observed to fall in the range 38.3 to 45.7 dB (A) during the night time. A

maximum of 45.7 dB (A) was observed at Dela (N283) and a minimum of 38.3 dB (A) was observed at

Dhamanva (N275).

A review of this data indicates that at all the locations, the noise level was found within the permissible

limits according to the rule S.O.50 (E), [11/01/2010] - The Noise Pollution (Regulation and Control)

(Amendment) Rules, 2010 except Palwasana during day time and Dela during night time due to heavy

vehicular traffic in the region.

2.6 Water Quality

The baseline water quality status in the region is established by analysing about 20 ground water samples

and 40 surface water samples during study period.

Ground Water

The pH value of the collected ground water in the study area found to be in the range from 7.47 to 8.41

and conductivity observed in the range 380 µS/cm to 3150 µS/cm. TDS values were observed to be in

range from 217 mg/L to 1827 mg/L. Total alkalinity is found to be the range from 124 mg/L to 390 mg/L

and Total Hardness ranges from 140 to 796 mg/L. The chloride values of the samples were observed

from 35 mg/L to 955 mg/L and Sulphate values were observed from 3 mg/L to 128 mg/L. Iron content

found in the range upto 3 mg/l. The Calcium and magnesium values were ranged from 16 mg/L to 163

mg/L and 15 mg/L to 93 mg/L respectively. Most of the metals are observed as below the detection limit.



Rev. No. 02


Executive Summary

viii

Total Coliforms were observed to be <2 MPN/100 ml to 40 MPN/100 ml and Fecal Coliforms were

observed to be <2 MPN/100 ml at Locations.

Surface Water

The pH value of the collected surface water in the study area found to be in the range from 6.35 to 7.52

and conductivity observed in the range 270 µS/cm to 3170 µS/cm. TDS values were observed to be in

range from 161 mg/L to 1798 mg/ L. Total alkalinity is found to be the range from 70 mg/L to 391 mg/L

and Total Hardness ranges from 100 to 540 mg/L. The chloride values of the samples were observed

from 21 mg/L to 750 mg/L and Sulphate values were observed from 2 mg/L to 312 mg/L. The Calcium

and magnesium values were ranged from 12 mg/L to 116 mg/L and 7 mg/L to 77 mg/L respectively. Iron

Content found in the range from 0.25 mg/l to 5.26 mg/l. Most of the metals are observed to be within the

detection limit. COD values found in the range from 14 mg/l to 60 mg/l. Total Coliforms were observed

Between 17 MPN/100ml and 900 MPN/100ml and Fecal Coliforms were observed between 2 MPN/100ml

and 90 MPN/100ml,it can be concluded that above surface water is not fit for drinking purposes unless it

is treated and disinfected. Surface water quality were also assessed against water quality criteria as per

CPCB guidelines for aquatic resources, which shows that all the water samples were unfit for drinking

purposes.

2.7 Biological Environment

As per primary survey and secondary data referred, it can be concluded that the study area are diverse

and ecologically rich. The geography of Mehsana, Ahmedabad, Gandhinagar and Patan districts boasts

of having a wide variety of flora and fauna which are spread throughout its length and breadth. Some of

the important mammals found in the study area are Monkeys, nilgai, chitals, wild boar, four horned

antelope, Sambhar deer, Onager (Asiatic wild ass), sloth beer and camels etc. A large number of other

animals like snakes, lizards, scorpions, bees, Jungle cat, Indian giant squirrel, wild dog, etc., are found

in the study area. Many kinds of birds are found here, such as: Greater flamingo, Peacock, Parrots,



Rev. No. 02


Executive Summary

ix

pheasants, geese, sparrow, Booted Eagle, white throated Kingfisher, Spotted Dove, Green Sandpiper,

Indian Robin, Painted Stork, ducks and cranes, etc.

The natural vegetation are diverse multistoried rain forests with trees, along with understory herbs, shrubs

and trees, lianas, and ephiphytes Flora of Ahmedabad, Mehsana, Gandhinagar and Patan districts

include a wide variety of vegetation. A wide range of climatic condition facilitates the prevalence of many

types of flora. Owing to the arid climate flora possess a wide range of xerophytic vegetation. The

predominant xerophytic vegetation includes Acacia arabica (Bbool), Acacia leucophloea, Capparis

ophylla and Zizyphus mauratiana etc. During the survey various species of flora are found in one of the

largest dry deciduous forests in the western region of India, including trees like: Terminalia catappa (Desi

badam), Terminalia arjuna (Arjun tree), Syzygium cumini (Jamun), Swietenia mahogany(Mahaneem),

Psidium guajava (guava), teak, Boswellia serrata, Anogeissus latifolia and Diospyros, etc. Owing to the

arid climate, the flora and fauna of Gujarat also possess a wide range of xerophytic vegetation. This kind

of vegetation include Acacia Arabica, Acacia leucophloea, Capparis ophylla and Zizyphus mauratiana,

etc. Therefore, as it is evident, the proposed project area has an enormous store of flora and fauna.

During survey of the study area, there is no endangered and endemic fauna or flora found near the Study

area.

2.8 Socio-Economic Environment

Socio-economic survey has been carried out due to personnel Questionnaire in the study area. As per

Census of India 2011, Mehsana district has a total population of 20, 35,064 out of which males constitute

10, 56,520 and females 9, 78,544 of the total population. The district has an average literacy rate of 84.26

% with male literacy of 91.88 % and female literacy of 76.12 %. In Mehsana, about 11 per cent of

population is under 6 years of age. Population density of district is 462/ sq. km and ranked 10th among

the state. Sex ratio of the district is 926 and position in the state is 17th. The people of study area residing

in this part of the district largely belong to Hindu community comprising Brahmins and Jats. These people

prefer colorful attires especially in their cultural events. Chorno and Kediyu are the traditional wear for

gents and Chaniya Choli is for women. Gujarati is the main communicative language of the local people

along with Hindi as a second most popular local language. People are allured towards their folk dance &

music which runs in their vein. Garba, Rass, Garbi and Dandiya are some of the prime cultural dances



Rev. No. 02


Executive Summary

x

enjoying by the people of this part of the study area. With regards to Sex Ratio in Ahmedabad, it stood

at 926 per 1000 male compared to 2001 census figure of 927. The average national sex ratio in India is

940 as per latest reports of Census 2011 Directorate. In 2011 census, child sex ratio is 842 girls per 1000

boys compared to figure of 801 girls per 1000 boys of 2001 census data.

In 2011 census, Patan district had a population of 1,837,892 of which males were 953,842 and remaining

884,050 were females. Ahmedabad District population constituted 3.37 percent of total Maharashtra

population. In 2011 census, this figure for Patan District was at 3.63 percent of Maharashtra population.

There was change of 10.73 percent in the population compared to population as per 2011. In the previous

census of India 2011, Gandhinagar District recorded increase of 12.08 percent to its population compared

to 2011.

3.0 Impact Assessment

The identification and assessment of impacts over the various environmental attributes in the region due

to the proposed project activities in the proposed blocks are discussed and mitigated measures and

environmental management plan for the potential impacts have also been presented. Onshore

exploration of oil & gas is a temporary activity which lasts for about 3-4 months at each well location.

3.1 Impact on Topography and Land Use

Onshore exploration of oil & gas project is a short duration activity at each well location, typically

encompassing a period of 3-4 months from land acquisition to site abandonment. The impact would

therefore be localized, temporary and minimal. Because of the above activities, the topographical

structure may change locally. However, considering the small foot print area required during the drilling,

only marginal impact due to change in land use is anticipated.

3.2 Impact on Climate

Impact on the climatic conditions due to drilling will not be significant. The maximum temperatures of the

exit gas from the DG stack and flare stack will be around 300°C and 400°C respectively. In terms of total

emission of greenhouse gases and consequent impact on global warming or on potential for local



Rev. No. 02


Executive Summary

xi

increase of ambient temperature, considering the quantum of exit gas and the total duration of flow, the

impact on the local or global climate will be insignificant.

3.3 Impact on Air Quality

The potential sources of air emissions at the well sites will be as follows:

Dust from earth works (during approach road and site preparation);

Emissions from DG sets (including noise emission);

Emissions from possible flaring during well testing; and

Emissions from vehicles

During the short period of site preparation mechanical shovels and earthmovers will be used for

vegetation clearance, cut and fill and other site leveling activities. These activities could generate dust

particles which can be controlled by sprinkling of water. However, these activities will be only temporary

and the impact to ambient air quality would be within the close proximity of well site.

The gaseous emissions from the DG set will be controlled by efficient combustion of fuel in the DG set.

The flaring of oil and gas during well testing is a short duration activity (about 14 - 21 days) and will be

done within a ground level enclosed pit. Wherever, required special precautions will be taken to minimize

the impact on the local environment and habitat.

3.4 Impact on Surface Water and Groundwater Quality

Drilling operations require the use of water for domestic requirements as well as for operations, but the

use will be of temporary nature and limited to a few days for each well. Hence these impacts are not

significant. The wastewater discharged from the ONGC’s drilling operations shall be collected in HDPE

lined collection pits and solar dried, so no significant impact is envisaged.The clarified wastewater will be

treated in mobile ETP located at the well sites and reutilized. The sewage will be discharged into septic

tanks and then to subsoil through soak pits.



Rev. No. 02


Executive Summary

xii

3.5 Impact on Noise Levels

During the proposed project operation at the well sites, there would be various sources of noise in the

area, viz., drilling draw works/rotors, mud pumps, power generators, Vehicular Movement and Cranes

and material handling equipment. Acoustic enclosures would be provided to minimize the Noise impact

of DG sets. The maximum predicted noise level at about 100 m from the boundary of the well site is about

52.0 dB (A). The ambient noise levels at most of the places in the region are within the CPCB standards.

Since, the drilling operations last for only 3-4 months at each location, impact of the noise pollution due

to the proposed exploratory drilling of wells project will be insignificant on the community.

3.6 Biological Impacts

Impact on the ecology of the study area will vary with the proximity of the habitats from the each well

locations. However, the impacts are of temporary nature, which will last only for few months at each well

location during the proposed project activities and will thus allow subsequent recovery after the activities

stops.

3.7 Demography and Socio-Economics

Although the level of existing communications and support services in the area are considered adequate

based on the population density, establishment of the proposed project would further strengthen the road

network and access to some of the remote areas with all-weather roads would be a distinct beneficial

impact. The overall impact is considered to be positive.

Impact on health due to emissions and noise from proposed project activity has been assessed to be

minimal. In addition employees working at the well site would be provided protective devices like ear

plugs/ear muffs for ensuring minimum impact on human health.

The proposed project should be possible to avoid impact on existing arable land. By following the

compensation procedures and by observing common courtesy, impacts on existing use and benefit rights

holders can be minimized.



Rev. No. 02


Executive Summary

xiii

The proposed programme is expected to generate local employment in the order of about 10-12 persons

per shift 8/12 hrs. While this benefit is small by most standards, it is a significant employment opportunity

in the block.

4.0 Environment Management Plan

The Environment Management Plan provides a delivery mechanism to address potential adverse

impacts, to instruct contractors and to introduce standards of good practices to be adopted during drilling

operations. For each stage of the programme, the EMP shall list all the requirements to ensure effective

mitigation of every potential biophysical and socio-economic impact. For each impact, or operation, which

could otherwise give rise to impact, the following information is presented:

• A comprehensive listing of the mitigation measures (actions) that ONGC shall implement

• The parameters that will be monitored to ensure effective implementation of the action

• The timing for implementation of the action to ensure that the objectives of mitigation are fully met.

4.1 Adherence/ Compliance of Eco-Standards

ONGC adheres to various Environment Management System as per international standards. All drilling

& work over rigs are certified ISO 9001, QHSAS 18001 & ISO 14001 for Quality, Health, safety and

Environment Management system. Monitoring and management of environmental aspects being done

for a) Noise monitoring b) Condition monitoring of equipment c) Stack monitoring d) Ambient Air quality

monitoring.

4.2 Waste Water Generation

The drilling operation would generate wastewater in the form of wash water due to washing of equipment,

string and cuttings etc. The only other source of wastewater generated from drilling operation is sewage

from sanitation facilities, which shall be disposed through septic tanks/soak pits. It is expected that

wastewater in the form of washings shall be generated at an average rate of around 4 m3/day during the

drilling operations from a single well. Waste water will be discharged in HDPE lined pit, and solar dried.



Rev. No. 02


Executive Summary

xiv

4.3 Atmospheric Emissions

The combustion of diesel for power generation for the proposed project operation results in atmospheric

emissions of SO2, NOx, CO, Particulates and Hydrocarbons.

4.4 Noise level

The modeling results show that the noise levels will attenuate to below permissible levels within the drill

site boundary. The Generators will be properly enclosed and the exhausts will be provided with silencers.

4.5 Solid and Hazardous Waste Management

The top layer of soil shall be stacked at site for reuse after completion of drilling operations. The solid

waste generated from drilling operation will be disposed in following manner.

Drill Cuttings – 128 m3 MT / well will be generated, which are mainly inert solids. Drill cuttings shall be

water washed and then solar dried at site in HDPE lined pit at site. Drill cuttings are collected dried and

disposed of as per GSR 546(E) dated 30th August 2005 guidelines for disposal of solid waste, drill

cuttings and drilling fluids for Onshore drilling process. Dry cuttings shall be covered with top layer of soil.

Spent Oil – During the drilling approx. 200 litres of spent oil shall be generated. This oil shall be sent to

authorize recyclers, as per ONGC policy.

Oil Sludge/ Hazardous waste – The proposed drilling is temporary activity the hazardous waste

generated during the operation (used oil, oil soaked cotton gloves and chemical containers and bags),

shall be treated and disposed as according Hazardous waste 2016 rules.it will be disposed of either

through approved recyclers TSDF site.

Drilling Mud – only non-hazardous waste Water base drilling mud shall be used, approx. 200m3 -600 m3

drilling mud per well is required.

4.6 Removal of Equipment and Materials



Rev. No. 02


Executive Summary

xv

In the event if economic quantities of hydrocarbons are found, the well will be suspended with a wellhead

in place for producing oil and gas, but all other equipment and materials will be removed from the site.

All empty drums, wastes, used and unused drilling fluids, fuel and lubricants will be removed from the

well site. Water supply and effluent discharge hoses and associated equipment will be removed. The

access road(s) would be reinstated.

4.7 Decommissioning upon Abandonment

In the event that no economic quantities of hydrocarbons are found, a full abandonment plan will be

implemented for the well sites in accordance with the applicable regulations (Oil Mines Regulation 2017).

5.0 Environmental Mitigation

The drilling program shall be designed to avoid or minimize impacts to the environment and local

communities wherever practicable & desirable. ONGC is committed towards environment protection with

a target to achieve exploration and production goals. One of the very important part of environment

protection is the selection of location of proposed development wells so that it should not affect the land

use pattern of the area, which is very important component of environment. In general locations of the

wells are decided at a safe distance from the dwellings, avoid minimum interferences with agricultural

activities, community infrastructure and also to avoid disturbances to forest lands and otherwise sensitive

or unique habitats. Wherever residual impacts remain, environment, mitigation measures shall be taken

to reduce the impact to an acceptable level or adequately offset it.

6.0 Environmental Monitoring

A monitoring schedule is very important in order to ensure that effluent and emissions conform to the

standard for which control measures have been designed.

The environmental attributes shall be monitored as given below:

6.1 Ambient Air Quality and Meteorology



Rev. No. 02


Executive Summary

xvi

The ambient air quality shall be monitored as per National Ambient Air Quality Emission

Standards issued by the MoEF&CC vide GSR No.826 (E) dated 16th November, 2009;

The ambient air quality shall be monitored twice in a month in line with the guidelines of

Central Pollution Control Board at each well locations in and around the wells as per the

parameters specified by CPCB; and

The fugitive emission in and around of the individual unit should also be measured for

particulate matter regularly and as per the latest CPCB guidelines.

6.2 Water Quality

The wells in the surrounding villages and downstream of drilling mud recirculation pond shall be identified

based on the ground level contours. There is a probability that during excavations, especially if conducted

immediately after monsoon may lead to development of springs which may have to be dewatered. Ground

water quality shall be monitored on quarterly basis.

Wastewater Quality

Unit wise monitoring at packed treatment plant would help in keeping a check over the operation of

treatment unit and to take measures to correct malfunctioning of the units. The main parameters for the

effluent monitoring are pH, oil & grease, suspended solids, dissolved solids, and heavy metals.

6.3 Noise Levels

Noise levels in the work zone environment such as rig operation or drilling area, D.G sets area, truck

parking area, administration block and all other work zone shall be monitored. The frequency shall be

once in a month in the work zone. Similarly, ambient noise levels at each well locations (preferably

nearby settlements) shall be monitored on a seasonal basis.



Rev. No. 02


Executive Summary

xvii

7.0 Occupational Health Surveillance Programme

This includes identification and control of health hazard and health care. Deployed Rig crew shall go for

periodic health check-up as company policy.

8.0 Risk and Disaster Management Plan

In view of the hazardous nature of products / process handled by the ONGC, site specific Disaster

Management Plans (DMPs) are in place. These plans are based on various probable scenarios like Well

Blow Out, Fire, Explosion, Natural Calamities etc. The consequence arising out of such incidents are

accurately predicted with the help of latest technique available by various Risk Analysis Studies. To

minimize the extent of damage consequent to any disaster and restoration of normalcy is the main

purpose of DMP. There are on site Emergency Plans that deal with handling of the emergency within

boundary of the plants mainly with the help of industry’s own resources. Also when the damage extends

to the neighbouring areas, affecting local population beyond boundaries of plant, Off-site Emergency

plans is put into action in which quick response and services of many agencies are involved e.g.

Government, Fire Services, Civil defence, Medical, Police, Army, Voluntary organizations etc. EMPs are

reviewed periodically.

8.1 Objective of DMP

The following are the main objective of Disaster Management Plan:

Safeguarding lives both at installations and in neighbourhood.

Containing the incident & bringing it under control.

Minimizing damage to property & environment.

Resuscitation & treatment of causalities.

Evacuating people to safe area.

Identifying persons and to extend necessary welfare assistance to causalities.



Rev. No. 02


Executive Summary

xviii

Finally when situation is controlled, efforts are to be made to return to normal or near normal

conditions.

9.0 Project Benefits

The proposed program will establish hydrocarbons in the block. The development of the oil field will result

in considerable growth of service sector and will also generate new industrial and business opportunities

in the area. The major benefits of the project include reduction of the oil import bill of the nation as well

as reduction of the imbalance in oil production and consumption. Further commercial development will

also lead to investment in Gujarat, bringing oil and gas revenues both to the State and to the Central

Government. The presence of ONGC in the region will further substantially improves the socio-economic

conditions of the region. In operation phase ONGC requires significant work force of non-technical and

technical persons.

10.0 Conclusions

The proposed project has certain level of marginal impacts on the local environment. However, the

proposed project has significant beneficial impact/effects in terms of providing the employment

opportunities and various CSR practices to be followed by ONGC. Growth and development, in harmony

with the environment, has always been the approach of ONGC.

The conclusions of EIA are:

The proposed project meets the compliance requirements of various environmental

regulations;

Adoption of environmental friendly Best Management Practices results in minimising the

impacts on environment;

Community impacts of the project will be beneficial, as the project will generate significant

economic benefits for the region;



Rev. No. 02


Executive Summary

xix

The post drilling, commercial developmental activities of ONGC can reduce the import

burdens of crude oil to the nation; and

With the effective implementation of the Environment Management Plan (EMP) during the

planning, design, construction and operation phases, the exploratory project can proceed

without significant negative impact on the environment.

Onshore Development and Production of

Oil and Gas from 406 wells in 40 ML Blocks of Districts Mehsana, Ahmedabad, Patan and Gandhinagar, Gujarat


Rev. No. 02


Chapter No. 01

1

CHAPTER-1

INTRODUCTION




Rev. No. 02


Chapter No. 01

2

1.0 Introduction

Oil and Natural Gas Corporation Limited (ONGC) is a Public Sector Undertaking (PSU) of the

Government of India, under the administrative control of the Ministry of Petroleum and Natural Gas

(MoPNG). It is India's largest oil and gas exploration and production company. It produces around 70%

of India's crude oil (equivalent to around 25% of the country's total demand) and around 60% of its natural

gas. This largest natural Oil & gas company ranks 11th among global energy majors (Platts). It is the only

public sector Indian company to feature in Fortune’s ‘Most Admired Energy Companies’ list. ONGC ranks

18th in ‘Oil and Gas operations’ and 183rd overall in Forbes Global 2000. Acclaimed for its Corporate

Governance practices, Transparency International has ranked ONGC 26th among the biggest publicly

traded global giants. It is involved in production of hydrocarbons in 26 sedimentary basins of India, and

operates over 25,500 kilometres of pipelines in the country, including sub-sea lines.

1.1 Purpose of the Report

As per Environmental Impact Assessment EIA Notification dated 14th September, 2006, onshore

exploration, development and production of oil & gas project falls under category ‘A’ of activity 1(b)

requires prior Environmental Clearance (EC) to be obtained from MoEF&CC before the commencement

of ground activity.

The application for prior EC (Form-1 and Pre-feasibility Report) for Development of oil and gas in 406

wells (Onshore) of 40 ML Blocks of Mehsana Asset has been submitted to MoEF&CC and Terms of

Reference (TOR) has been issued by MoEF&CC vide letter reference F. No. IA-J-11011/352/2016-IA-II

(I) and Proposal No. IA/GJ/IND2/60533/2016 dated 21st November, 2016. A copy of the TOR letter

(Annexure-1), along with its compliance is enclosed.

This EIA Report is prepared in line with the TOR issued by MoEF&CC and addresses the anticipated

environmental impacts of the proposed project and proposes the mitigation measures for the same for

obtaining Environmental Clearance (EC) from MoEF&CC, New Delhi. The report covers the primary data

collected during 3 months of Summer Season.

1.2 Identification of Project and Project Proponent




Rev. No. 02


Chapter No. 01

3

1.2.1 Identification of Project

This proposal of development drilling steps forwards towards energy security of India. ONGC in its pursuit

to meet the ever increasing and constantly growing energy demand of the country is confronted with the

challenge to produce more and more hydrocarbon by way of new finds, putting new finds in to production

and by optimizing production and maximizing recovery from existing brown fields by way of infill drilling,

technology induction under various schemes. Four hundred and Six (406) development wells of 40 ML

Blocks of Mehsana Asset are proposed to be drilled to evaluate the hydrocarbon potential lies in the

Mehsana, Ahmedabad, Patan and Gandhinagar District of Gujarat state.

1.2.2 Project Proponent

Mehsana Asset has been endowed with a number of oil fields with multi-layered pays belonging to

Paleocene to middle Miocene age. More than 26 small to medium size oil and gas fields have been

established in the Mehsana area of Mehsana- Ahmedabad Tectonic block which is fairly well explored,

productive hydrocarbon block of North Cambay Basin. Exploration activity for hydrocarbon by ONGC in

Mehsana block commenced in the sixties and discovered fields are in an advanced stage of exploitation.

Oil & gas accumulation in these fields ranges in age from Upper Paleocene in the Olpad formation in

Khamboi field to Miocene in the Babaguru in Lanwa and North Kadi field.

The major oil fields of the Asset have been put under six different areas for the purpose of administration,

geo-scientific studies and field development as follows: Bechraji & Lanwa(Area-I), Santhal & Balol (Area-

II), Jotana (Area-III), Sobhasan Complex (Area- IV), Nandasan, Linch, Langhnaj, Mansa & other satellite

structures (Area-V) and North Kadi (Area-VI). Area I & II constitute the heavy oil fields of Mehsana Asset.

1.2.3 Proposed Project

As per the proposed project, Four Hundred and Six (406) development wells to be drilled in 40 ML

Blocks of Mehsana, Ahmedabad, Patan and Gandhinagar Districts of Gujarat state, in Mehsana Asset in

the Oil and Natural Gas Corporation Ltd (ONGC) operated acreages. 406 locations (Onshore) of 40 ML

Blocks were considered after 2D and 3D seismic data acquisition processing and interpretation. The

targeted depths of proposed development wells shall be up to 1600 mts. The said ML Blocks are with

ONGC with 100% operatorship and are producing Blocks till date. In support of the long term hydrocarbon




Rev. No. 02


Chapter No. 01

4

Development and production program, ONGC proposes to drill 406 development wells in the 40 ML

Blocks.

1.3 Brief Description of the Project

1.3.1 Nature of the Project

The proposed project intends to identify the onshore development of oil & gas in Four hundred and Six

(406) wells in the Mehsana, Ahmedabad, Patan and Gandhinagar Districts of Gujarat state, in Mehsana

Asset in the Oil and Natural Gas Corporation Ltd (ONGC) operated acreages.

1.3.2 Size of the Project

ONGC has identified onshore 406 development wells of oil & gas in non–forest area of 40 ML blocks in

Mehsana, Ahmedabad, Patan and Gandhinagar Districts of Gujarat state. The proposed project falls in a

fairly well explored, productive hydrocarbon asset of Mehsana Asset. Operational areas for the 40 Blocks

covered in this study having an area of 1114.006 Sq Km.

1.3.3 Project Site Details

Brief description of the project is given in Table 1.1. Details of block coordinates is given in Table 1.2.

The study area map showing the block location are shown in Figure-1.1 and the topographic map of

Block Locations are shown in Mehsana, Ahmedabad, Patan and Gandhinagar districts in Figure 1.2 (a)

to 1.2 (d).




Rev. No. 02


Chapter No. 01

5

Figure 1.1: Index Map of the Area




Rev. No. 02


Chapter No. 01

10

Table 1.1: Brief Description of the Project

S. No. Item Details

1. Name of the Project Development drilling of Four hundred Six (406) wells in 40

ML Blocks of Mehsana Asset lies in the Mehsana,

Ahmedabad, Patan and Gandhinagar District of Gujarat

state.

2. Project Sector 40 ML Blocks of Mehsana Asset

3. Location of the Project Mehsana, Ahmedabad, Patan and Gandhinagar District of

Gujarat state.

4. Project Region Mehsana Asset

5. Block Area (Sq. Km.)

Becharaji ML-37.110 sq. km ;

Balol Ext. I ML 5.83 sq. km.

Balol ML 24.004 sq. km.

Charada and Mansa ML 187.5 sq. km.

Charada ML 10.0 sq. km.

Chanasma ML 2.813 sq. km.

Dedana ML 5.44 sq. km.

East Sobhasan ML 22.42 sq. km.

Geratpura ML 21.6 sq. km.

Jakasana ML 9.80 sq. km.

Jotana Ext-I ML-57.70 sq. km ;

Jotana Ext-II ML-0.870 sq. km ;

Jotana ML-39.50 sq. km ;

Jotana South ML-23.0 sq. km ;

Warosan ML-38.050 sq. km ;




Rev. No. 02


Chapter No. 01

11

Kadi-Ajol ML- 0.72 sq. km;

Kadi ML 64.49 sq. km ;

Langhnaj-Wadasma ML 13.84 sq. km ;

Linch Ext – I ML 34.25 sq. km ;

Linch Ext – II ML 13.35 sq. km ;

Linch ML 43.73 sq. km ;

Langhnaj ML 12.92 sq. km ;

Lanwa Ext-1 ML 2.148 sq. km ;

Lanwa ML 30.0 sq. km ;

Mehsana City Ext-II 7.58 sq. km ;

Mehsana City 8.85 sq. km ;

Mansa Ext-I 12.50 sq. km ;

Mansa 58.72 sq. km ;

North Sobhasan (Part A&B) 12.048 sq. km ;

North Sobhasan Ext I 56.85 sq. km ;

Nandasan Langnaj ML 61.90 sq. km ;

Nandasan Ext-I ML 26.387 sq. km ;

Patan ML 13.619 sq. km ;

Sobhasan ML 36.893 sq. km ;

Sanganpur ML 6.970 sq. km ;

Sathal ML 19.16 sq. km ;

West Mevad ML 13.203 sq. km ;

West Sobhasan ML 9.606 sq. km ;

North Kadi Ext ML 61.43 sq. km ;

North Sobhasan Ext-II 23sq.km.

6. Total Block Area of the

Project 1114.006 sq. km

7. Total Cost of the Project

2402.83 crores




Rev. No. 02


Chapter No. 01

12

8. MSL Level

81m (Mehsana and Gandhinagar District),76 m Patan

and 53 m Ahmedabad Above sea level

9. Survey of India Toposheet

No. 46A-3, 46A-6, 46A-11, 46A-11

Table 1.2 Details of Block Coordinates

S.NO Locations Present Area

(Sq. Km)

Longitude Latitude Number of Proposed

Wells

District

1 Becharaji 37.110 72.18472 23.51104 18 Mehsana

72.15999 23.44882

72.13362 23.44682

72.12699 23.50048

72.10222 23.52632

72.09029 23.5277

72.09029 23.54215

72.11834 23.54215

72.14389 23.52409

72.16472 23.51104

2 Balol Ext I 5.836 72.21277 23.63548 15 Mehsana and Patan

72.2361 23.64714

72.2361 23.62798

72.23844 23.61991

72.23499 23.61936

72.21055 23.61936




Rev. No. 02


Chapter No. 01

13

72.21277 23.63548

3 Balol 24.004 72.25915 23.64075 20 Mehsana

72.26138 2361853

72.28721 23.54937

72.27943 23.54659

72.28164 23.5384

72.27565 23.53645

72.27221 23.5527

72.2577 23.53356

72.24463 2359992

72.24166 23.61936

72.23869 23.61945

72.2361 23.62796

72.25915 23.64075

4 Charada-Mansa

187.5 72.57262 23.63241 2 Mehsana and Gandhinagar

72.5994 23.60214

72.5994 23.58381

72.62578 23.54242

72.62578 23.47592

72.62468 23.47548

72.60801 23.50187

72.57301 23.56909

72.56274 23.58769

72.56774 23.59686

72.56357 23.55741




Rev. No. 02


Chapter No. 01

14

72.52442 23.54815

72.56051 23.50187

72.58717 23.43604

72.57385 23.41521

72.53324 23.4057

72.51608 23.43506

72.51608 23.45133

72.5193 23.45136

72.51924 23.45498

72.51608 23.45494

72.51608 23.48381

72.49941 23.48381

72.49941 23.50048

72.46608 23.50048

72.46608 23.4922

72.45852 23.49992

72.45913 23.50048

72.45913 23.52965

72.46302 23.53965

72.46497 23.53965

72.49302 23.53965

72.49357 23.55881

72.57162 23.63241

5 Charada 10.0 72.62578 23.47592 2 Mehsana and Gandhinagar

72.62575 23.52132




Rev. No. 02


Chapter No. 01

15

72.65354 23.50019

72.65245 23.47715

72.62578 23.47592

6 Chanasma 2.813 72.18611 23.70297 15 Patan

72.18611 23.70686

72.20111 24

72.22271 23.71364

72.20361 23.70242

72.16611 23.70297

7 Dedana 5.44 72.08834 23.52576 4 Mehsana

72.09029 23.5277

72.10222 23.52632

72.12695 23.50048

72.12812 23.49182

72.1225 23.48993

72.08834 23.52576

8 East Sobhasan 22.42 72.46053 23.5945 2 Mehsana

72.49357 23.55881

72.49302 23.53964

72.49975 23.53965

72.4272 23.5652

72.45941 23.56436

72.45997 23.58436




Rev. No. 02


Chapter No. 01

16

72.46053 2359450

9 Geratpura 21.6 72.37776 23.53798 3 Mehsana

72.41608 23.50048

72.43275 23.50937

72.44553 23.50414

72.44553 23.50048

72.45319 23.50048

72.45552 23.49992

72.4375 23.48715

72.40866 23.48715

72.40866 23.46745

72.40108 23.46215

72.37776 23.53798

10 Jakasana 9.80 72.29148 23.44846 4 Mehsana

72.28621 23.44798

72.30137 23.46882

72.31245 23.45462

72.30637 23.44715

72.32248 23.44215

72.31846 23.44743

72.33123 23.43132

72.30937 23.41632

72.29943 23.45049




Rev. No. 02


Chapter No. 01

17

72.29148 23.44846

11 Jotana Extn I 57.70 72.27082 23.62075 5 Mehsana

72.30554 23.62714

72.35331 23.68381

72.32183 23.55214

72.33276 23.50493

72.32065 23.50298

72.30971 23.54798

72.28165 23.5384

72.27943 23.54659

72.28721 23.54937

72.28699 23.59784

72.28054 23.60381

72.27082 23.62075

12 Jotana Extn II 0.870 72.31245 23.45462 1 Mehsana

72.31846 23.44743

72.31248 23.44215

72.30637 23.44715

72.31245 23.45462

13 Jotana 39.5 72.28693 23.47965 5 Mehsana

72.27555 23.53645

72.39971 23.54798

72.34123 23.41851




Rev. No. 02


Chapter No. 01

18

72.30137 23.46882

72.28621 23.45798

72.27999 23.41851

72.28693 23.46882

14 Jotana South 23 72.33276 23.50493 5 Mehsana

72.32193 23.55214

72.35331 23.55381

72.37084 23.5092

72.36276 23.50676

72.36442 23.50048

72.33276 23.50493

15 Warosan 38.050 72.32005 23.50293 5 Mehsana

72.3327 23.50493

72.36442 23.50048

72.36276 23.50676

72.37084 23.5092

72.37359 23.60048

72.38914 23.60048

72.401 23.46215

72.37953 23.44382

72.32896 23.46698

72.32065 23.50298




Rev. No. 02


Chapter No. 01

19

16 Kadi-Ajol 0.72 72.25082 23.39549 2 Mehsana and Ahmedabad

72.27296 23.4026

72.27812 23.38493

72.25082 23.38493

72.25082 23.39549

17 Kadi 64.490 72.29054 23.4241 12 Mehsana and Ahmedabad

72.32748 23.33188

72.33248 23.34966

72.34553 23.31882

72.33664 23.27799

72.31443 23.26105

71.27010 23.41224

72.29054 23.4241

18 Langhnaj-

Wadasama

13.840 72.48683 23.45859 3 Mehsana and Gandhinagar

72.49941 23.46398

72.53324 23.40571

72.33248 23.4016

72.49524 23.42132

72.48497 23.43382

72.49941 23.43715

72.48683 23.45859

19 Linch Extn-I 34.25 72.30937 23.41632 4 Mehsana




Rev. No. 02


Chapter No. 01

20

72.33123 23.43132

72.34442 23.41437

72.37442 23.39215

72.37192 23.36716

72.33248 23.34956

72.32748 23.38188

72.31876 23.37055

72.32054 23.37116

72.30837 23.41032

20 Linch Extn-II 13.35 72.32898 23.46898 4 Mehsana

72.37953 23.44362

72.34442 23.41437

72.34123 23.41851

72.32898 23.46898

21 Linch 43.73 72.34442 23.41437 24 Mehsana

72.40108 23.46215

72.40866 23.46745

72.40866 23.46046

73.43775 23.46046

73.43775 23.48715

72.4375 23.48715

72.45552 23.49992

72.4683 23.49048




Rev. No. 02


Chapter No. 01

21

72.41041 23.43382

72.37442 23.39215

72.34442 23.41437

22 Langhnaj 12.92 72.4683 23.49048 4 Mehsana

72.46608 23.4922

72.46608 23.50048

72.49941 23.50048

72.49941 23.48381

72.51608 23.48381

72.51608 23.43507

72.48683 23.4039

72.4663 23.45859

23 Lanwa Ext-1 2.148 72.16778 23.73158 35 Patan

72.17166 23.73491

72.19874 23.71408

72.19276 23.71047

72.16778 23.73158

24 Lanwa 30 72.20361 23.70242 35 Mehsana and Patan

72.22721 23.7163

72.25044 23.68047

72.27943 23.65214

72.2361 23.62798

72.2361 23.66381




Rev. No. 02


Chapter No. 01

22

72.20361 23.70242

25 Mehsana City

Ext II

7.58 72.45997 23.58436 2 Mehsana

72.45941 23.58436

72.4272 23.6652

72.41053 23.57937

72.4272 23.57937

72.45997 23.58436

26 Mehsana city 8.85 72.4122 23.6027 2 Mehsana

72.41747 23.59409

72.39748 23.58603

72.3987 23.58403

72.39109 23.57964

72.37664 23.68659

72.37831 23.61992

72.38553 23.61992

72.39109 23.59435

72.4122 23.6027

27 Mansa Ext I 12.5 72.56884 23.50187 2 Mehsana

72.52451 23.54815

72.57056 23.53796

72.58357 23.50187

72.58684 23.50187

28 Mansa 58.72 72.58274 23.59769 2




Rev. No. 02


Chapter No. 01

23

72.57301 23.56909 Mehsana and Gandhinagar

72.5801 23.50187

72.61468 23.47548

72.63143 23.47617

72.63217 23.4642

72.67494 23.45881

72.65412 23.43187

72.6705 23.4227

72.64939 23.44909

72.62662 23.43604

72.58717 23.50187

72.56051 23.50187

72.58357 23.55742

72.56774 23.59686

72.58274 23.59769

29 North

Sobhasan (Part

A & B)

12.048 72.39012 23.6583 5 Mehsana

72.36464 23.64703

72.35582 23.681

72.37908 23.6583

72.42246 23.58628

72.40261 23.58628

72.40261 23.58806

72.41747 23.59409




Rev. No. 02


Chapter No. 01

24

72.4122 23.6027

72.40137 23.59853

72.40137 23.61392

72.42246 23.61392

72.42246 23.58628

30 North Sobhasan

Ext I

56.85 72.41375 23.64536 2 Mehsana

72.38553 23.61992

72.37831 23.61992

72.86386 23.61992

72.36309 23.58881

72.3161 23.71491

72.33734 23.72766

72.41375 23.64536

72.41375 23.64536

72.46053 23.5945

23.45997 23.58436

72.4272 23.57937

72.41053 23.57937

72.40261 23.58628

72.42248 23.58628

72.42248 23.61392

72.40137 23.61392

72.38553 23.61992




Rev. No. 02


Chapter No. 01

25

72.41375 23.64536

31 Nandasan-

Langhej

61.9 72.4683 23.49048 20 Mehsana

72.49941 23.43715

72.48497 23.43382

23.49524 23.42132

72.45302 23.39798

72.41858 23.36271

72.39061 23.40743

23.41941 23.43382

72.4683 23.49048

32 Nandasan Ext-

1

26.387 72.45302 23.39798 16 Mehsana

72.46774 23.40604

72.47024 23.39271

72.46663 23.39271

72.46663 23.38382

72.45108 23.38549

72.44802 23.38854

72.42386 23.36104

72.42247 23.3691

72.37192 23.36716

72.37442 23.39215

72.39081 23.40743

72.41858 23.38271




Rev. No. 02


Chapter No. 01

26

72.45302 23.39708

33 Patan 13.619 72.03014 23.79645 2 Patan

72.05746 23.60927

72.06501 23.79936

72.0689 23.76074

72.07744 23.79505

72.08487 23.78333

72.06984 23.75891

72.04304 23.75891

72.03044 23.79645

34 Sobhasan 36.893 72.37998 23.57353 10 Mehsana

72.40261 23.58628

72.4272 23.56502

72.43275 23.50937

72.41608 23.50048

72.37776 23.53798

72.37998 23.57353

35 Sanganpur 6.970 72.46497 23.53984 3 Mehsana

72.46302 23.52985

72.44553 23.52985

72.44557 23.50414

72.43275 23.50937

72.42975 23.53985




Rev. No. 02


Chapter No. 01

27

72.48497 23.53984

36 Santhal 19.16 72.28693 23.47965 50 Mehsana

72.29799 23.46837

72.27027 23.46909

72.2586 23.49354

72.25776 23.54492

72.25233 23.54492

72.25124 23.55381

72.27221 23.5527

72.28693 23.47965

37 West Mevad 13.203 72.35311 23.56361 4 Mehsana

72.36248 23.56659

72.37998 23.57353

72.37778 23.53798

72.38914 23.50048

72.37358 23.50048

72.35331 23.58381

38 West Sobhasan 9.606 72.38386 23.61902 4 Mehsana

72.37831 23.61902

72.37664 23.58869

72.39109 23.57984

72.37008 23.87353

72.38248 23.56659




Rev. No. 02


Chapter No. 01

28

72.30306 23.61992

39 North Kadi Ext

(New)

61.43 72.2588 23.49354 44 Mehsana and Ahmedabad

72.27026 23.46869

72.27899 23.46937

72.29148 23.44846

72.29943 23.45648

72.32054 23.37716

72.31876 23.37654

72.29054 23.4241

72.2701 23.41224

72.27296 23.4226

72.25082 23.38549

72.22156 23.43104

72.21869 23.4511

72.22895 23.45437

72.2281 23.46966

72.23082 23.46132

72.22344 23.47757

72.25350 23.49354

40 North Sobhasan

Ext-II

23

72.42375 23.64536

3 Mehsana

72.48053 23.39450




Rev. No. 02


Chapter No. 01

29

1.3.4 Importance of the Project

India is highly dependent on import of crude oil. Net imports of crude oil is 35.70 MMTs during 2018-19.

Although more than 70% of its crude oil requirements and part of the petroleum product requirement is

met from imports, India has developed sufficient processing capacity over the years to produce different

petroleum products. As result, India is now a net exporter of petroleum products.

Energy security has become one of the top three goals of the Indian Government. The Indian Government

is encouraging development and production of oil and gas to a great extent. This would primarily allow

India to tap its own resources there by reducing its import bill.

Discovery of viable hydrocarbon reserves in the state can boost the state’s economic development to a

great extent. It would also catalyse influx of industries in the state. The proposed exploration project is

thus of immense significance for the Country. Extraction of hydrocarbons in these blocks will substantially

improve the socio-economic conditions of the region. The proposed project will also help to discover the

geological past to create the economic future for the region as well as to the country.

72.45997 23.58438

72.42720 23.57927

72.41053 23.57937

72.40261 23.58628

72.42248 23.58628

72.42248 23.01392

72.40139 23.61392

72.38553 23.61992

72.42375 23.64536




Rev. No. 02


Chapter No. 01

30

1.4 Scope of the Study

With a view to assess the environmental impacts arising due to the proposed development drilling for oil

& gas in 40 blocks in Mehsana, Ahmedabad, Patan and Gandhinagar district, Gujarat, ONGC being

NABET accredited organization had prepared EIA report for various environmental components including

air, noise, water, land and biological components along with parameters of human interest which may be

affected and also prepared an Environmental Management Plan (EMP) for mitigating adverse impacts.

ONGC has availed the services of M/s. ABC Techno Labs India Private Limited, Chennai to undertake

Baseline Environment Monitoring. ABC Techno Labs India Private Limited is an ISO 9001:2008,

ISO14001: 2004, OHSAS 18001:2007 certified company and accredited by National Accreditation Board

for Testing and Calibration Laboratories (NABL).

Environmental baseline monitoring has been carried out during three months representing summer

season and used to identify potential significant impacts. The scope of the present study is in-line with

the TOR as recommended by MoEF&CC. The scope of study broadly includes:

To conduct literature review and to collect data relevant to the study area;

To undertake environmental monitoring so as to establish the baseline environmental status

of the study area;

To identify various existing pollution activities in the ambient levels;

Establishing the relevant features of the proposed project that are likely to have an impact

on the environment;

Predicting the impacts on the environment due to proposed project;

To evaluate the predicted impacts on the various environmental attributes in the study area

by using scientifically developed and widely accepted environmental impact assessment

methodologies;

To prepare a Disaster Management Plan (DMP) based on Risk Assessment, studies;

To prepare an Environment Management Plan (EMP) outlining the measures for improving

the environmental quality and scope for future proposed project activities and Occupational

Health and Safety for environmentally sustainable development; and

To identify critical environmental attributes required to be monitored.

The literature review includes identification of relevant articles from various publications, collection of data

from various Government agencies and other sources.




Rev. No. 02


Chapter No. 01

31

1.4.1 Administrative and Legislative Background

The principal Environmental Regulatory Agency in India is the Ministry of Environment and Forest and

Climate Change (MoEF&CC), New Delhi. MoEF &CC formulates environmental policies and accords

environmental clearance for the projects.

1.4.2 Study Area for EIA The study area for the EIA covers the 10 km radius from the boundaries of 40 blocks in Mehsana, Ahmedabad, Patan and Gandhinagar district. The total block area is considered as the study area.

1.4.3 Methodology of the Study

Engineers and scientist of M/s. ABC Techno Labs India Private Limited, Chennai along with ONGC officials had conducted a reconnaissance survey and sampling locations were identified on the basis of:

Collection, collation and analysis of baseline data for various environmental attributes viz Ambient air quality, Water quality, Soil, and Noise etc.

Predominant wind directions in the study area as recorded by India Meteorological Department (IMD);

Existing topography, location of surface water bodies like ponds, canals and rivers;

Location of villages/towns/sensitive areas;

Accessibility, power availability and security of monitoring equipment, pollution pockets in the area; and

Areas which represent baseline conditions.

Field studies have been conducted for a period of three months (27th April to 27th July, 2018) representing

summer season to determine existing conditions of various environmental attributes as outlined in Table-

1.3.




Rev. No. 02


Chapter No. 01

32

TABLE-1.3 Environmental Attributes and Frequency of Monitoring

Sr. No

Environmental Component

Sampling Locations

Sampling Parameters

Sampling Period

Sampling Frequency

1 Meteorology 2 location

Temperature, Wind Speed, Wind Direction, Relative Humidity, Rainfall

One non monsoon season (Three months)

Continuous hourly recording

2 Ambient Air Quality 30 Locations PM2.5, PM10, SO2, NOx, CO, VOC & BTX, THC CH4-HC and

non CH4-HC

Two consecutive days per week

24 hourly samples

3 Water Quality 40 Locations of surface water & 20 locations of Ground water

As per IS: 10500 Grab sampling Once during study period

4 Noise Monitoring 360 Locations Sound Pressure Levels

Continuously for 24 hours

Once during study period

5 Soil Analysis 20 Locations within study area

Physical and Chemical characteristics

Composite sample

Once during study period

6 Ecology Terrestrial Ecological Locations & Aquatic location within study area

Flora and fauna Field observations and secondary sources

Once in study period

7 Demography and Socio-economic aspects

Total block area Demographic profile

Based on District Census Handbook (2011) and field observations




Rev. No. 02


Chapter No. 01

33

Sr. No

Environmental Component

Sampling Locations

Sampling Parameters

Sampling Period

Sampling Frequency

8 Land Use Total block area Trend of land use

change for different

categories

Based on District Census Handbook

(2001) and satellite images

9 Geology - Geological history

Data collected from secondary

sources

10 Hydrology - Drainage area and

pattern, nature of streams, aquifer characteristics, recharge and discharge rates

Based on data collected from

secondary sources

Apart from the primary data on the existing baseline quality status of various environmental components,

a summary of physical, natural, social and cultural environment has also been provided incorporating

secondary data collected from various sources.

1.5 Contents of the Report

The report has been framed in eleven chapters and presented as follows:

Chapter-1.0: Introduction

This chapter provides background information of the project, brief description and objectives of the project,

description of the area, scope, methodology and organization of the study.

Chapter-2.0: Project Description

This chapter presents the information on the proposed project activities, technology being adopted, sources

of pollution and proposed control measures.

Chapter-3.0: Description of the Environment

This chapter presents the methodology and findings of field studies undertaken to establish the baseline

conditions.

Chapter-4.0: Anticipated Environmental Impacts and Mitigation Measures




Rev. No. 02


Chapter No. 01

34

This chapter details the inferences drawn from the environment impact assessment of the project during

Exploration, development and production phase. It describes the overall impacts of the project and

underscores the areas of concern which need mitigation measures.

Chapter-5.0: Analysis of Alternatives

This chapter presents the analysis of alternative sites and technologies considered for the proposed

project.

Chapter-6.0: Environmental Monitoring Programme

This chapter provides recommendations for Environment Management Plan (EMP) including mitigation

measures for minimizing the negative environmental impacts of the project. Environmental monitoring

requirements for effective implementation of mitigation measures during operation of the project along

with required institutional arrangements for their implementation.

Chapter-7.0: Additional Studies

This chapter covers the details of risk involved in the project, public hearing, Disaster Management Plan

(DMP), Occupational Health and Safety (OHS) and summary of other special studies as per TOR

conditions.

Chapter-8.0: Project Benefits

This chapter presents the details of proposed Corporate Social Responsibility (CSR) activities and the

benefits of the project to the community.

Chapter-9.0: Environmental Cost Benefit Analysis

This chapter contains the Cost benefit analysis from environment point of view.

Chapter-10.0: Environment Management Plan

This chapter contains the detailed Environment Management Plan.

1.6 Status & Stage of Regulatory Framework

As per the Schedule attached to the EIA Notification 2006, as amended till date, the proposed project is

covered under Project or Activity, 1(b), namely Offshore and Onshore Oil and Gas Exploration,




Rev. No. 02


Chapter No. 01

35

Development and Production. Such activities are also listed as Category A under the said Notification,

requiring prior Environment Clearance (EC) from the Impact Assessment Authority (IAA), i.e. the Ministry

of Environment, Forests & Climate Change (MoEF&CC), New Delhi.



Rev. No. 02


Chapter No. 02

1

Chapter 2

PROJECT DESCRIPTION



Rev. No. 02


Chapter No. 02

2

2.0 PROJECT DESCRIPTION 2.1 Introduction

This chapter presents the project information including technical details of the proposed development of

oil & gas operations, utilities and services, infrastructure facilities and sources of pollution. The expected

quantum of the waste generation and treatment and safe disposal of the waste are also discussed in the

chapter.

2.2 Type of the Project

The proposed project is an onshore development Project for oil & gas reserves and as per EIA notification

dated 14th September, 2006, onshore development and production of oil & gas project falls under

category of activity 1 (b)

2.3 Need of the Project

The demand for petroleum has recorded a considerable increase over the year from 30 million tonnes in

1980-81 to about 35.70 MMT at present (FY 2018). This growing demand poses a big challenge to oil

producing companies. Proposed drilling activities will be under taken by ONGC in these blocks may lead

to in helping meet some part of the rising oil and gas requirement of the country . By drilling exploratory

well new discovery can be made for future oil demand. Also, new oil finds of the blocks will lead to

reduction in India’s dependence on imported crude oil and thereby resulting into considerable saving in

foreign exchange.

2.4 Typical Well Site Details

The site will be sized to contain all equipment and buildings, storage, workshops, etc. using distances

between various rig components in line with existing rules and regulations for the area of operation and

the approved standard operating procedures of the drilling contractor. Within the above constraints, the



Rev. No. 02


Chapter No. 02

3

site shall be sized to minimize environmental impact. The approximate area of each well site is dependent

on the type of drilling equipment deployed which in turn is dictated by the planned depth of drilling.

Minimum land required at each well site during drilling will be 110 m x 110 m, i.e., 1.21 ha. On an average,

the land requirement at each well site, including site facilities and camp site is considered as 1.21-1.5 ha.

Each well site will require the following facilities:

Portable office cabins / rest rooms (container type cubicles);

Drilling rig foundation and celler;

Foundation / pits for ancillary equipment;

Space for drill rig equipment, working area and materials lay down area;

Waste storage pits;

Cutting disposal (impervious lined) pits;

Waste storage pit;

Septic tank with soak away pits;

Paved and contained chemical storage area;

Above ground diesel storage tanks with paved and bounded area;

Radio room;

Storm water drainage system;

Internal roads and fencing.

In the proposed project, each well sites will be restricted access area and fenced all round with round the

clock watch and ward facility. Entry of vehicles into the drilling site area will be prohibited except for

material movement. Adequate parking facilities will be provided outside the drilling location.

2.4.1 Size or Magnitude of Operation



Rev. No. 02


Chapter No. 02

4

The proposed drilling in 40 onshore ML blocks covering an area of 1114.006 km2 to establish the presence

of hydrocarbon reserves. The estimated cost of the proposed project is approximately Rs. 2402.83 Crores.

The salient features of the project and magnitude of various resources required for the project is given in

Table-2.1.

Table-2.1 Salient Features of the Proposed Project

Sr. No. Features Details

1 Total block area in the district

40 Blocks of area 1114.006 sq.km in Mehsana, Ahmedabad, Patan and Gandhinagar district, Gujarat

2 Project Operator Oil and Natural Gas Corporation Limited (ONGC)

3 Proposed number of wells 406 wells

4 Depth of wells Upto 1600 mts

5 Estimated project cost Total of Rs. 2402.83 Crores

6 Duration of drilling 3 - 4 months for each well

7 Land requirement at each well site including site facilities and camp site

Total Average 1.5-2.25 ha At each well site: about 1.56 ha Base Camp: 0.5 ha

8 Water requirement 25 m3/day

9 Drill cuttings generation at each well site

up to 128 m3/well approximately

10 Drilling Wastewater generation at each well site

About 04 m3/day (for solar evaporation in lined pit at drilling site)

11 Domestic wastewater generation at each well site

01 m3/day ( in septic tank, followed by soak pit)

12 Power requirement for each well

1250 kVA X 2 nos & 1 nos standby

13 Manpower requirement for each well

Approx. 20 per shift of 12 hrs.

14 Estimated fuel (HSD) consumption per well

85 KL

2.4.2 Resource Requirement for the Project



Rev. No. 02


Chapter No. 02

5

2.4.2.1 Land Requirement

The minimum land required at each well site during Development of oil & gas will be 110 m x 110 m, i.e., 1.21-1.5 ha. The land will be acquired on a temporary basis and if commercial quantity of oil or gas is found, the land will be taken on long lease and if oil and gas is not found in commercial quantities, the land will be returned to the owner by restoring the land as per restoration policy of ONGC.

2.4.2.2 Water Requirement

Water is basically required for preparing drilling mud, direct washing of drill cuttings, cooling of gas engines and for meeting domestic needs of the campsite. Typically, the water consumption for each well will be 25 m3/day. However, the drilling and domestic water requirement would depend on the time required to drill the well, which is primarily dependent on the proposed depth. Table-2.2 gives the water consumption for a typical each well site. Water balance diagram of each well site is given in the Figure: 2.1

Table-2.2 Water Requirements for Each Well Site

S. No. Purpose Peak water required during Drilling period (KLD) per well

Drilling Operation

1 Mud preparation 18

2 Drill cutting washing 05

Derrick floor Washing

3 Desander 05

Desilter

4 Domestic requirement 05

5 Mud Pump / Equipment Cooling 02

Total Water requirement for Drilling (KLD) 35

Actual Requirement of fresh water (KLD) 25



Rev. No. 02


Chapter No. 02

6

Figure 2.1: Water Balance of each well site The water requirement will be met through water tankers from nearby ONGC Installations. Suitable water transport arrangement will be made to transfer water for both drilling and domestic purposes.

2.4.2.3 Power Requirement

The power requirement of the drilling rig will be catered through 03 Nos of 1250 kVA Diesel Generator (DG) sets with 1 Nos of DG set will be kept as Stand by. The DG set details and fuel requirements is given in Table-2.3.



Rev. No. 02


Chapter No. 02

7

TABLE-2.3 DETAILS OF DG SETS

Location DG Capacity Operational Stand by Fuel Requirement

Drilling site 1250 kVA 2 1 2.5-3.0 KLD

2.4.2.4 Drilling Mud

Only water-based drilling mud will be used for the drilling of all wells. Drilling of wells requires specially

formulated muds which basically comprise inert earth materials like bentonite, barite in water with several

additives to give mud weight, fluidity and filter cake characteristics while drilling. The drilling muds have

several functions like lubrication and cooling of the drill bit, balancing subsurface formation, bringing out

the drill cuttings from the well bore, thixotropic property to hold cuttings during non-operations, formation

of thin cake to prevent liquid loss along well bore etc. Several additives are mixed into the mud system

to give the required properties. Water based mud will be used to the possible extent in the drilling but use

of synthetic based mud may require due to complexities associated with the geological formation and

associated hole stability problems. The main components of drilling mud are slurry of inert solids

suspended in a liquid phase. The main constituents of the water-based mud are Bentonite and Barites

and Calcium carbonate, all of which are natural minerals. The role of the mud in pressure control is

especially important. The density of the mud can be increased by the addition of barite weighting material.

Bentonite and Calcium carbonate are employed to improve the theological properties and enable the drill

cuttings to be transported from the hole while drilling and also be suspended in the fluid while the drill bit

is being changed. The barite used in the drilling mud would be as per American Petroleum Institute (API)

standard specifications.

If Synthetic Based Drilling mud (SBM) need to be used after certain depth, synthetic mud will be recycled

completely and at the end of the drilling activities, drilling mud is collected and reused in subsequent

drilling operations.

2.5 Proposed Schedule for the Project Approval and Implementation

The duration of various stages of the proposed project is given as under:



Rev. No. 02


Chapter No. 02

8

The duration of construction works including site excavation, preparation and well pad

construction is expected to last approximately thirty days for each well site.

Well testing operation will be done over a period of 2-3days.

Abandonment and restoration of the each well site is expected to take about one month.

Thus, on an average, site preparation and drilling of one well is likely to take approximately 3-4 months

under normal conditions. Working hours during the drilling activity will be 24 hours per day, seven days

per week with 12 hours per shift.

2.6 Development Plan of the Project

It is planned that 195 Wells will be in Non EOR Field Area and 211 Wells in EOR Field Area. Total Oil

production is about 13.651 MMt to be produced over a period of 6 years given in Table 2.5 & 2.6. Drilling

of these development wells which includes horizontal/hi-tech wells in addition to conventional wells will

not only arrest the natural decline of field production but it is expected to augment production.

2.6.1 Description of drilling rig

To exploit hydrocarbon in sub-surface, an oil well is drilled by deploying a drill rig. In general, a 17 ½”

hole is drilled from the surface up to a predetermined depth and 13 3/8” surface casing is done to cover

fresh water sands, prevent caving, to cover weak zones & to provide means for attaching well head & the

blowout preventer (BOP). This is followed by drilling of 12 ¼” hole and lowering of 9 5/8” intermediate

casing depending upon the depth of the well and anticipated problems in drilling the well. The 8 ½” holes

is drilled up to the target depth of the well cased with 5 ½” production casing to isolate the producing zone

from the other formations. In the process of drilling, drilling fluid is used to lift the cutting from the hole to

the surface. Drilling fluid is formulated by earth clay and barites. Various types of bio-degradable polymers

are also added to maintain the specific parameters of the mud. After completion of production casing the



Rev. No. 02


Chapter No. 02

9

well is tested to determine & analyze various parameters of producing fluid. Both 2 Casing policy and 3

Casing Policy wells will be drilled. Details of drilling rigs are given in Table 2.4

Table 2.4 Details of drilling rigs and facilities to be deployed:

Type of rig Trailor mounted mobile

rigs (Mech)

BHEL make

AC/SCR type

electrical rig

Power Generation type Mechanical Power

through coupling of

diesel engines

Electrical Power by

DG sets

Solid Handling System Shale shaker/ desander/ mud cleaner

Impervious lined waste pit availability and its

size.

Impervious lined waste pit of 1800 M3 capacity

at each well site approx...

Water pit and its capacity Cemented water pit of 200 M3

Use of Oil pit / steel tanks Steel tanks will be used to collect oil during well testing

Avg. manpower on rig / shift. 20

Availability of ETP for effluent treatment. In the process of hiring.

Availability of Blowout control equipments. Three stack BOP, choke & kill manifold, and other associated controls.

Chemical storage. On brick lined platform/ steel platform

Production testing facility No testing for development wells. Completed wells connected through X-mass tree.

Ingredients of drilling fluid Bentonite clay, polymer, lime stone, barite

Special additives and their function in drilling

fluid

Various types of biodegradable polymers to

make the drilling fluid non-damaging and to

stabilize the bore hole.



Rev. No. 02


Chapter No. 02

10

Resource Optimization/Recycling: - Three regular Mobile ETPs and one (call out basis) Mobile ETP

each having 50 cubic metres/day capacity is about to be installed in drilling rig areas to recycle waste

water which can again be reused (under procurement stage).

Availability of water: - Total Water requirement per well will be 25 KLD water will be supplied through

tankers from the existing tube wells of ONGC. Potable water requirement at site met separately.

Energy/power requirement: - Estimated fuel consumption per well will be 85KL per well. Inhouse Power

generation will be there through DG Sets.

2.6.2 Wastes generated and their disposal:-

Waste water storage pit: - Waste water storage pits (size 45m X 25m X 1.5m) will collect waste water

which comes from drilling operations. Waste water present in waste pits will be recycled and reused

during drilling phase. Water based drilling fluid will be used. The residual waste water and drilling fluid

from drilling operation will be collected in waste pits for solar drying. The pit will be lined with HDPE sheet.

Drill cuttings: - Cuttings are collected in waste water pit. The mud system is water base, non-toxic & bio

degradable. The toxicity of the mud has been tested for LC50 by National Institute of Oceanography, Goa

and found to be non-toxic.

Domestic sewage treatment and waste disposal system:-

All sewage generated will be treated in septic tank-soak pit system. Tank is sized to cater 4-5 m3/day.

2.6.3 Abandonment and Restoration:-

In the event the well is unsuccessful the well bore will be cement plugged. Any contaminated soils (eg.

by accidental spills of fuel, lubricants, hydraulic fluids, saline produced water) will be treated on site or if

necessary to an appropriate landfill for further bioremediation. During site reclamation subsoil compaction

will be relieved by scarifying and all top soil will be evenly replaced.

2.7 Technology and Process Description



Rev. No. 02


Chapter No. 02

11

The activity involves drilling of the hole across various ground layers to a predetermined depth. Drilling

operations in on land areas are generally the same irrespective of geographical area of operation. Drilling

operation is carried out using an electrically operated rig. A typical drilling rig sketch is shown in Figure-

2.2

Drilling unit for oil & gas wells consists of a derrick at the top of which is mounted a crown block and a

hoisting block with a hook. From the swivel is suspended a Kelly stem which passes through a square or

hexagonal Kelly bush which fits into the rotary table. The rotary table receives the power to drive it from

an electric motor. The electric motor rotates the rotary table, through which passes the Kelly bush, and

the rotations are transmitted to the bit as the drilling progresses, the drill pipes in singles are added to

continue the drilling process. At the end of the bit life, the drill pipes are pulled out in stands and stacked

on the derrick platform. A stand normally has 3 single drill pipes. After changing the bit, the drill string is

run back into the hole and further drilling is continued. This process continues till the target depth is

reached.

During the course of drilling, cuttings are generated due to crushing action of the bit. These cuttings are

removed by flushing the well with duplex/triplex mud pumps. The mud from the pump discharge through

the rotary hose connected to stationary part of the swivel, the drill string and bit nozzles. The mud coming

out of the bit nozzles pushes the cuttings up the hole and transports them to the surface through the

annular space between the drill string and the hole. The mud not only carries away crushed rock from

the bottom of the hole but it also cools the bit as it gets heated due to friction with formation while rotating.

The hydrostatic head of the mud helps in balancing subsurface formation pressures thereby preventing

uncontrolled flow of formation fluids into the well bore; in extreme cases this phenomenon is termed blow-

out, a rare occurrence.

At the surface, the mud coming out from well along with the cuttings falls in a trough, passes through the

solids control equipments i.e. shale shaker of 1200 GPM capacity, desander of 1200 GPM capacity,

desilter of 1200 GPM capacity and mud cleaner. These equipments remove the solids of different sizes,

which get mixed with the mud during the course of drilling. The cleaned mud flows back to the suction

tanks to be again pumped into the well. The drilling mud/fluid circulation is thus a continuous cyclic

operation. The most suitable clay for mud preparation is bentonite, which is capable of forming highly



Rev. No. 02


Chapter No. 02

12

Table 2.5: Wells Planned To Be Drilled In Plan Period

Development wells planned to be drilled (Field wise and ML wise)

Field Wells

North Kadi 48 Kadi ML, North Kadi Ext-I New, Linch Ext-I, Jakasana

Shobhasan Complex

44 Sobhasan, N.Sobhasan A&B, N.Sob.Ext-II, N.Sob. Ext-I, Geratpur ML, East Sob., West Sob., West Mewad, Mehsana City Ext-II, Mehsana city, Sanganpur

Nandasan 34 Nandasan-Langhnaj, Nandasan Ext-I

Jotana 18 Jotana, Jotana Warosan, Balol, Jotana Ext-I, Jotana Ext-II, Jotana South

Linch 43 Linch, Linch Ext-I, Linch Ext-II, Jotana Warosan

Langnaj 7 Langhnaj, Langhnaj Wadasama

Mansa 1 Charada Mansa, Mansa, Mansa Ext-I

Santhal 52 Santhal

Balol 50 Balol, Balol Ext-I, Lanwa

Lanwa 87 Lanwa,Chansma, Lanwa Ext-I

Bechraji 22 Bechraji,Dedana

Total No. of Wells

406



Rev. No. 02


Chapter No. 02

13

Table 2.6: Gas and Liquid Handling Capacity of different Installations in 40 ML Blocks

S No. ML falling in 4 districts of Ahmedabad, Gandhinagar,

Mehsana & Patan Installation

406 Wells Planned

for Drilling

Present Liquid handling capacity

(M3/day) Present Gas handling capacity (M3/day)

1 Becharaji

BECH.GGS1

18

1800

BECH.GGS2 1350

BECH.GGS3 closed

2 Balol Ext I BALOLGGS3 15 950

3 Balol

BALOLGGS2

20

600

BALOLGGS3 950

BALOLGGS4 400

LANWAGGS3 600

4 Charada-Mansa MANSAMTS

2 closed

SOBGGS/CTF 1700 550000-Natural gas

5 Charada MANSAMTS 2 closed

6 Chansma LANWAGGS2 15 400

7 Dedana BECH.GGS1 4 1800

8 East Sobhasan SOBGGS/CTF 2 1700 550000-Natural gas

9 Geratpura SOBGGS/CTF

3 1700 550000-Natural gas

SOBH.GGS2 1615 275000-Natural Gas

10 Jakasana NKADIGGS4

4 1400 22000- Natural Gas

NKGGS/CTF 5500 70000-Natural Gas



Rev. No. 02


Chapter No. 02

14

11 Jotana Ext-I

BALOLGGS1

5

450 100000-natural gas+2500-flue gas

BALOLGGS2 600 60000-natural gas+90000-flue gas

BALOLGGS3 950 8500-Flue gas

12 Jotana

BALOLGGS1

5

450 100000-natural gas+2500-flue gas


JOTANAGGS 850 200000-natural gas

NSGGS/CTF 6000 150000-flue gas

SSGGS/CTF 4000 300000-natural gas+450000-flue gas

13 Jotana South LANGNAJEPS

5 350 38000-natural gas

SOBH.GGS1 400 130000-natural gas

14 Jotana-Warosan

JOTANAGGS

5

850 200000-natural gas

LINCHGGS 1500 210000-natural gas


15 Kadi

LINCHGGS

12


NKADIGGS4 1400 22000-natural gas

NKGGS/CTF 5500 70000-natural gas

16 Langhnaj-Wadasama LANGNAJEPS


SOBGGS/CTF 1700 550000-natural gas

17 Linch Ext-I

LINCHGGS

8




18 Linch Ext-II JOTANAGGS



19 Linch

LANGNAJEPS

24



NANDASNGGS 1500 175000-natural gas

20 Lanwa Ext-I LANWAGGS2 35 400 -



Rev. No. 02


Chapter No. 02

15

21 Lanwa

LANWAGGS1

35

650 -

LANWAGGS2 400 -

LANWAGGS3 600 70000-Flue gas

NLANWAEPS closed -

22 Mahsana City Ext-II SOBGGS/CTF



23 Mehsana city SOBH.GGS1 2 400 130000-natural gas

24 Mansa Ext-I MANSAMTS 2 Closed -

25 Mansa MANSAMTS 2 Closed -

26 North Sobhasan Part A & B SOBH.GGS1 5 400 130000-natural gas

27 North Sobhasan Ext-II SOBH.GGS1 3 400 130000-natural gas

28 Nandasan-Langnaj

LANGNAJEPS

20




29 Nandasan Ext-I LINCHGGS

16 1500 210000-natural gas


30 North Kadi Extn-1 New

NKADIGGS1

44







31 Sobhasan

SOBGGS/CTF

10




32 Sanganpur SOBH.GGS2 3 1615 275000-natural gas

33 Santhal BALOLGGS1 50 450 100000-natural gas+2500-flue gas



Rev. No. 02


Chapter No. 02

16


NSGGS/CTF 6000 150000 flue gas


34 West Sobhasan SOBH.GGS1 4 400 130000-natural gas

35 Langnaj LANGNAJEPS 4 350 38000-natural gas

36 Kadi-Asjol NKGGS/CTF 2 5500 70000-natural gas

37 Patan Tharad - 2

38 North Sobhasan Ext.I SOBGGS/CTF 2 1700 550000-natural gas

39 Jotana Ext-II JOTANAGGS 1 850 200000-natural gas

40 West Mevad SOBH.GGS1/CTF 2 400 130000-natural gas

Flue gas contains 70-80% N2, 10-12% CO2 and 8-10 % hydrocarbon



Rev. No. 02


Chapter No. 02

17

Dispersed colloidal suspensions. Various other chemicals are also used in mud preparation as per

requirements dictated by the temperature/pressure conditions of the wells. The mud is continuously

tested for its density, viscosity, yield point, water loss, pH value etc. to ensure that the drilling operations

can be sustained without any down-hole complications.

2.7.1 Drilling of Development well

To explore hydrocarbon in sub-surface, an oil well is drilled by deploying a drill rig. In the process of

development drilling, drilling fluid is used to lift the cutting from the hole to the surface. Drilling fluid is

formulated by earth clay and barites. Various types of bio-degradable polymers are also added to

maintain the specific parameters of the mud. After completion of production casing the well is tested to

determine & analyze various parameters of producing fluid.

Where a hydrocarbon formation is found, initial well tests are conducted to establish flow rates of oil &

gas and formation pressure along with other reservoir parameters. These tests may then generate oil,

gas and formation water. On completion of testing, the well would be declared oil / gas producer or dry.

Development, of oil & gas process may encounter various hazards such as well active situation (kicks),

blowouts, H2S situation etc. They are discussed in brief as follows.

Well Kick Situation

While drilling, if the formation pressure exceeds the hydrostatic pressure exerted by the drilling fluid,

formation fluids break out in to the well bore. This is called kick. Primary means of well control is to have

sufficient over-balance, over formation pressure. For some reason if an unexpected over-pressurized

formation is encountered while drilling and if the well control situation arises, rig is equipped with

equipment to control this situation.

Blowout Situation

Uncontrolled “well control situation” eventually leads to a blowout. Blowout can cause a partial or total

destruction of drilling rig. Blowouts are often associated with hydrocarbon spill followed by fire.



Rev. No. 02


Chapter No. 02

18

Well Control

This set of equipment is called “Blowout Preventers (BOP)”. Blowout Preventer consists of, “Annular

Preventer”, which can generally close on any size or shape of tubular in the well bore and closes the

annular space between drill string and casing. Another type of blowout preventer is a “Ram Preventer”.

Ram preventers are of two types i.e., Pipe Rams and Shear Rams. Pipe rams also close the annulus

between drill string and casing, but they have a fixed size. As such a specific pipe rams can be closed

on a specific size of pipe. Shear rams are generally the last choice of preventer to be operated as they

shear drill string and shut off the well bore. After determining the existing formation pressure and other

geological complexities from the seismic data, appropriate BOP will be used as per standard oil field

guideline for the same.

Surface Testing & Flaring

ONGC will conduct vertical flaring at all the sites, in case the presence of hydrocarbon is encountered. A

flaring stack with burner and adequate stack height will be provided. Approximately, the duration of the

test is around 2-3 days. Temporary test separators with all control facilities for flow metering will be

provided. Testing facilities will be available at drilling rig for separation of liquid phase and burning of all

hydrocarbons during testing. The test flare boom will be located at a distance from the drilling rig.



Rev. No. 02


Chapter No. 02

19

1) Crown Block

2) Catline Boom and Hoist

Line

3) Drilling Line

4) Monkeyboard

5) Traveling Block

6) Top Drive

7) Derrick or Mast

8) Drill Pipe

9) Doghouse or drillers shack

10) Blowout Preventer

11) Water Tank

12) Electric Cable Tray

13) Engine Generator Sets

14) Fuel Tanks

15) Electrical Control Room

16) Mud Pump

17) Bulk Mud Components

Storage

18) Mud Pits

19) Reserve Pits

20) Mud Gas Separator

21) Shale Shakers

22) Choke Manifold

23) Pipe Ramp

24) Pipe Racks

25) Accumulator

Figure-2.2 Drilling Rig Sketch



Rev. No. 02


Chapter No. 02

20

2.8 Details of Project Utilities

2.8.1 Site Preparation

On identification of the proposed each well site, reconnaissance survey will be done to locate suitable

land on temporary lease basis. Land clearance for site construction at each drilling site will be kept to a

minimum practicable in order to safely accommodate the facilities. Earth moving equipment typically a

bull dozer armed with a grader blade / ripper teeth and scoop bucket will be used for the leveling / grading

and excavating work. Where possible topsoil will be cleared and stored for later reinstatement purposes

by piling it along the boundary of the site. The natural contours will be worked on to minimize off-site

disposal of excavated earth. The site area (except the pit areas) will be provided with hard-standing by

providing a layered base of coarse aggregate covered with morum. This is done to provide sufficient load-

bearing capacity to enable all construction and drilling operations to be executed safely.

2.8.2 Approach Roads

The approach road to each well sites will need to be constructed/ upgraded to provide access for the

drilling equipment and construction machinery and material, supply vehicles, passenger vehicles etc. In

general, it is intended to make maximum use of the existing infrastructure by strengthening the roads with

the consent of the local administration and the concerned regulatory authorities. This would result in an

added advantage to the local community. In case new roads are to be made, compensation for right of

way will be provided. The choice to leave these newly constructed roads or to restore them back to

original land use condition will depend on the requirements of the local authorities.

2.8.3 Installation of Facilities

Site construction would include the impermeable layer lined drilling fluid, drill cuttings, waste and water

storage pits, foundations for the drilling rig and accessories, inter-connecting drains, secure storage



Rev. No. 02


Chapter No. 02

21

provision for chemical, oil and waste oil, portable-cabins and a sewage treatment system (septic tank and

soak away pits and piping). A ground level flare pit arrangement will be made for flaring purpose.

The mobilization of the each well site involves transportation of drilling rig in modules and erected by

means of mobile cranes. The well site equipment’s are designed as modular / skid mounted type, which

facilitates quick demobilization and re-mobilization. The installation of the well site equipment / facilities

involves about 50 trailer loads spread over 10 days. Once the site is prepared, drilling equipment, supplies

and drilling personnel will be mobilized and the drilling rig will be erected.

The salient features of the well site facilities are detailed below.

Earthwork

The each well site area will be fenced by high barbed wire. The drilling rig will be positioned almost in the

middle of this area. Typically, a depth of 1.0 or 1.5 m is excavated around the prospecting drilling location.

Excavation work shall be carried out under the permit-to-work system and in such a manner that the

collapse of sidewalls is precluded. The foundations for the drilling rig and accessories, inter-connecting

drains, secure storage provision for chemical, oil and waste oil, porta-cabins and a sewage treatment

system (septic tank and soak away pits and piping) waste and water storage pits will also be set up.

Appropriate fencing and sign boards will be provided to prevent persons and livestock from accidentally

falling into an excavation pit.

Surface Drainage

The proposed project sites and camps will have an adequate drainage and wastewater conveyance

system so that all wastewater are contained and can be disposed as per the Gujarat State Pollution

Control Board (GPCB) discharge norms.

The drilling rig location will be connected with paved drains to the lined drilling fluid collection pits. Surface

drains will be adequately graded and maintained and kept debris free to ensure quick disposal of their

contents. Bunds will be sized so that they can contain surface runoffs for limited period.

Fuel & Chemical Storage Area



Rev. No. 02


Chapter No. 02

22

The fuel (Diesel) will be received in bulk quantity through road tankers and stored in above ground steel

diesel tanks. The tanks will be constructed, operated and maintained as per the requirements of the

Explosive Rules and all the statutory licenses will be obtained. The tank farm area will be provided with

secondary containment of adequate capacity to impound any accidental leaks.

Chemicals will be stored on a paved platform with kerb walls and protected against weather through an

impervious covering. Separate storages are earmarked for liquid and solid chemicals. All the storages

are identified with tags and sign boards. All required safety precautions such as display of the MSDS,

provision of fire extinguishers are followed.

Waste Oil collection, Storage & Disposal System

Waste oil of about 150-200 liters/month from pumps or other machinery will be trapped and manually

collected and stored in a paved dedicated waste oil storage area. The storage area will be provided with

paved flooring and covered roofing. The storage facility shall be designed based on the CPCB guidelines

for Hazardous waste Storage. The waste oil will be collected and handed over to GPCB and MoEF&CC

authorized waste oil recyclers at the end of the drilling campaign.

Spill Containment System

Containment systems and oil traps will be provided to trap any escape of oil before it can leave the drilling

site. All potential sources of spillage will be equipped with drainage facilities / drip pans / spill collection

kits in order to contain spills. Drains and bunds will be sized to contain surface runoffs for limited period

and any oil detected in the drains will be manually soaked using sorbent materials.

Water & Drilling Fluid Storage Pit

The water storage pit contains the water used for preparing drilling fluid. The drilling fluid storage pit will

collect all the wastewater, which come from the drilling operations. The wastewater present in the waste

pits will be recycled and reused during drilling phase. Whereas, the residual wastewater from the drilling

operation will be collected in waste pits for solar drying. The pit will be lined with polyethylene propylene

sheet and the overlaps welded together with the edges bought over the rim and tucked into the soil. At



Rev. No. 02


Chapter No. 02

23

the end of the drilling phase, the liquid fraction of the waste drilling fluid will be allowed to evaporate and

the pit is filled with soil and capped with compacted moorum layer.

Drill Cuttings Disposal Pit

During drilling operations, approx. 128 m3 per well drill cutting are expected to be generated from each

well depending on the type of formation and depth of drilling. Cuttings will be collected and disposed off

in an environmentally safe manner. The cuttings disposal pit will be similar in construction to the

wastewater pit. Typically the pit (will be 2 nos of 30’ x 33’ x 5’ deep, 1 nos of 38’ x 33’ x 5’ deep and 1

nos of 23’ x 20’ x 5’ deep) will be lined with polypropylene liner. The cuttings disposal pit will be placed

within the drilling lease area to prevent the transport of waste mud and cuttings from the drilling site to

another area to prevent any spillage on the other areas.

Domestic Sewage Treatment & Disposal System

The domestic sewage generated from the each well site operations will be disposed off in a septic tank

– soak pit system. The septic tank will conform to the IS design specification. The overflow from the septic

tank will be led into series of soak pits for sub-surface disposal.

Drilling Fluid Circulation

The drilling fluids circulation system consists of several items of equipment. The mud pump takes in mud

from the mud tanks and sends it out a discharge line to a standpipe. The standpipe is a steel pipe mounted

vertically on one leg of the derrick. The mud is pumped up the standpipe into a flexible reinforced rubber

hose called the Kelly hose. The Kelly hose connected to the swivel; goes down the Kelly, drill pipe and

drill collars and exits at the bit. The mud then does a sharp U-turn and heads back up the hole in the

annulus. The annulus is the space between outside of the drill string and the wall of the hole. Finally, the

mud leaves the hole through a steel pipe called the mud return pipe and falls over a vibrating screen like

device called the shale shaker. The mud containing cuttings is screened out of the shaker. The mud

drains back into the mud tanks and is recycled back into the well via the mud pump, while the drill cuttings

which are inert materials of shale, sand, and clay fall into the lined waste pits. Once the mud is cleaned,

it is pumped down the drill string again. The drilling fluids left over at the end of the particular well, which



Rev. No. 02


Chapter No. 02

24

can’t be further reused, will be discharged into the lined waste pits and dried. The pits will be provided

with HDPE liners to maintain integrity and prevent any leakage. The drill cuttings cut by the drill bit are

removed from the mud by the shale shakers and other solids removal equipment and transferred to the

waste pits. The drilling fluid circulating system at rig is essentially a self-contained, closed system, shown

in Figure-2.3

Role of Drilling Fluids

Drilling fluid serves the following essential functions:

The removal of drilled solids (i.e. cuttings) from the bottom of the hole and their transport to

the surface for separation from the mud;

Lubrication and cooling of the drill bit and string;

Deposition of an impermeable cake on the well bore wall to seal the formation being drilled;

Suspension of drilling cuttings in the fluid during the interruption of drilling; and

Countering the natural formation pressures and preventing uncontrolled flow of fluid from the

formations.

The role of the drilling fluids in pressure control is especially important. If the drill bit penetrates a formation

containing oil, gas or water under pressure these fluids are prevented from flowing into the borehole by

ensuring that the drilling mud is of sufficient density to counter the natural formation pressures. The

density of the mud can be increased by the addition of barite weighting material. Bentonite is employed

to improve the rheological properties and enable the drill cuttings to be transported from the hole while

drilling and also be suspended in the fluid while the drill bit is being changed. The barite used in the

drilling mud would be as per API standard specifications.

Water based drilling fluids, which are of an environmentally acceptable nature with regards to current

Indian legislation, will be used. The water based drilling fluid will be non-hazardous in nature.



Rev. No. 02


Chapter No. 02

25

Figure-2.3 Drilling Fluid Circulation System at Typical Rig

2.9 Post Drilling Operations - Abandonment and Restoration

2.9.1 Demobilization & Decommissioning

Well Capping - Removal of Equipment and Materials



Rev. No. 02


Chapter No. 02

26

In the event that economic quantities of hydrocarbons are found, the well will be suspended with a

wellhead/X-mass tree in place, but all other equipment and materials will be removed from the site.

All empty drums, wastes, used and unused drilling fluids, fuel and lubricants will be removed from the

drilling site. Water supply and effluent discharge hoses and associated equipment will be removed. The

access road(s) would be either left behind or reinstated based on the needs of the local authorities.

Restoration of Cutting Containment Area

At the conclusion of well testing at each drilling site, the spent drilling fluids will be dewatered by

flocculating the contents and allowing the water phase to evaporate away. All solids & liner will be buried

in a secured lined pit and covered with soil and left onsite. The cutting mud is inert and with appropriate

lining of the pit in place it does not pose any potential for soil or groundwater contamination. ONGC will

follow a well laid site restoration plan. Tree plantation will be done on the closed pits to restore the original

soil conditions. At all the sites the pits are filled with the black cotton soils or red soils which is available

at shortest distance. Filling and plantations are handed over to the contractors with close watch of ONGC

officials.

2.9.2 Restoration of Well Sites

Decommissioning upon Abandonment

In the event that economic quantities of hydrocarbons are found, the well site will be closed as detailed

above. In the event that no economic quantities of hydrocarbons are found, a full abandonment plan will

be implemented for the drilling sites. The actions outlined above would apply to decommissioning upon

abandonment as well, but abandonment would be more permanent. All concrete or steel installations

would be removed to at least 1 m below ground level so as to ensure that there are no protruding surface

structures. In the unlikely event that soil is found contaminated, measures would be taken to remove or

treat appropriately all contaminated topsoil to promote its remediation. This is as per the ONGC’s

Restoration SOP. The overriding principle being that the environment should, with time, be reinstated to



Rev. No. 02


Chapter No. 02

27

broadly its original condition. Until such time as this is achieved, ONGC would actively manage the

reinstatement process.

2.9.3 Traffic Volumes

During the civil operations earth moving equipment will be working on the access road and the well

location. It is anticipated that there will be an average of 5 truck movements a day to cater the site

preparation for an average period of about 20 days. Prior to and after the drilling operation, when building

the rig or rig move, up to 80 heavy truckloads over a period of 4-5 days are envisaged. During the drilling

operation, supply truck movements are estimated on an average of eight to five per day. Small vehicles

movements are used mainly for transport of personnel, visitors etc. which might be as much as 10 per

day. ONGC will engage in constructing compacted approach roads without black topping to all well

locations and camp sites. Though this will not cause any changes in topography, the dust generation will

be less than any other village roads. The same roads can be used by the villagers after completion of the

drilling activities.

2.10 Sources of Pollution

2.10.1 General

The various types of pollution from the proposed project operations are:

Water Pollution;

Air Emission;

Solid Waste Generation & disposal ; and

Noise Generation.

Exhaust gases from DG sets, wastewater, drilling wastes and noise from the drilling operations are the

major sources of the pollutants generated during the proposed drilling operations which is temporary

activity lasting for maximum of 3-4 months at each of the well locations.



Rev. No. 02


Chapter No. 02

28

2.10.2 Wastewater Generation and Disposal

The water will be required during the drilling rig is mainly meant for drilling mud preparation and for

domestic purposes. Thus, wastewater during this phase will comprise of drilling wastewater and domestic

wastewater. The proposed project sites and camps site will have an adequate drainage system so that

all wastewater are contained and disposed as per the CPCB Standards. Means will be provided to trap

any escape of oil before it can leave the site. Surface drains will be adequately graded and kept debris

free to ensure quick disposal of their contents. Minor quantity of wastewater would be generated from

cleaning operations carried out at the rig. About 5 m3/day of wastewater is expected.All wastewater

streams except sewage will be directed to a 1.5 mm HDPE lined pit. Wastewater collected in the pit will

be clarified and treated in solar evaporation pond or packaged wastewater treatment plant for removal of

oil and suspended solids to meet the regulatory discharge standards. Solids generated from the treatment

plant will be collected, tested for hazardous contents and disposed to land once it is ensured that there

are no hazardous contents.

Domestic Wastewater

Sewage generated from the camps would be discharged and treated in septic tanks. The supernatant

from the septic tanks will be passed through soak pits into the ground.

2.10.3 Air Emissions

During drilling of oil & gas wells, air pollutants are emitted by the diesel engines that power the drilling

equipment. These engines release particulate matter that can contain heavy metals, volatile organic

compounds and polycyclic organic matter. They also emit sulphur dioxide, oxides of nitrogen which

contributes to smog formation. The vehicular movement associated with the drilling activities is also an

important cause for the dust pollution. The predominant air emissions from the proposed project

operations are gaseous emissions, viz., sulphur dioxide, oxides of nitrogen and hydrocarbons. Each

power generator will have the adequate stack height for easy dispersion of gaseous emissions. The

height of the DG exhaust stack will be about 6.8 m (including the height of the trailer from the ground).



Rev. No. 02


Chapter No. 02

29

Traces of Natural gas will be flared during the well testing phase for short period. The test flaring will

result in temporary emissions of CO2, water vapors, NOX and other trace gases in case of natural gas

flaring and additionally particulates in case crude oil is flared. It is assumed that the occurrence of SO2 in

the flare gas would be in traces or negligible.

2.10.4 Solid Waste

The proposed project operations generate drill cuttings. The minor wastes include sanitary waste,

domestic waste and waste oil from lubricating system.

2.10.4.1 Drilling Mud

The drilling mud will be re-circulated and reused to maximum possible extent through its mud recycling

system. Maximum amount of drilling mud attached to the drill cutting is separated by Solid control System

such as Shale Shaker, clay shaker and will be recycled during the drilling process. However, only a

portion of the non-usable mud at the end of the drilling would be discharged. The drilling mud will be

collected in lined pit and solar evaporated.

2.10.4.2 Drill Cuttings

Drill cuttings are worn out rocks from subsurface formations that are generated during drilling operations.

The drill cuttings are conveyed to the surface, suspended in the drilling fluid (drilling mud). The drill

cuttings are separated in the shale shaker from the drilling mud and are stored in an impervious 1.5 mm

HDPE lined pit. The particle size varies from coarse particles of less than 1mm diameter to few

centimeters. Drill cuttings are encapsulated by a thin layer of adhering mud.

The drill cuttings will be washed thoroughly and the wastewater generated will be collected in HDPE

Lined pit at site and will be solar dried.



Rev. No. 02


Chapter No. 02

30

2.10.4.3 Waste Pit Details

Typical sectional view of the drill cutting and drilling mud collection pit is presented in Figure-2.4

Figure-2.4 Typical Section View of Drilling Cut and Drill Mud Collection Pit

2.10.4.4 Used / Spent Oil

Used / spent lubricating oil from pumps or other machinery would be trapped and manually collected and

stored in a paved dedicated waste oil storage area. Approximately 150-200 liters/ used/ spent oil would

be generated from a drilling operation. Stored waste oil would be disposed through SPCB authorised

used / spent oil recyclers.

2.10.4.5 Drilling Mud and Drill Cuttings Analysis

The drill cuttings & the drilling mud at each location will be tested to ensure it meets the requirement of

MoEF&CC guidelines for disposal of drill cuttings and drilling fluids for onshore operations. The analysis

carried out on spent drilling mud / cuttings during the previous drilling campaigns by ONGC in other parts

of the country have reported LC50 in excess of 30,000 mg/l.



Rev. No. 02


Chapter No. 02

31

2.10.4.5 Noise Levels

The major noise generating sources are DG sets, pumps at drilling rig and other equipment of drilling rig

would contribute to continuous noise. Typically, the noise generating sources for the drilling activity are

provided below (in the immediate vicinity):

Diesel Generator : 90 to 95 dB(A)

Pumps at the Rig : 85 to 90 dB(A)

Miscellaneous : 80 to 85 dB(A)

Control Room & Quarters : 50 to 60 dB(A)

Noise is not considered to be a potential threat since the drilling sites will be selected keeping in view that

there are no settlements in close proximity to the drilling site.

2.11 Qualifications, Skills and Training Practice

a) Qualification

Jobs requiring specific qualifications and certificates e.g. welding, driving of vehicles, electrical

work, crane operation, fork lift & bulldozers operation should be carried out only by persons

having the required qualifications and certificates. The certificates should be properly checked

for adequacy and a copy of the same should be available for verification by ONGC personnel.

b) Skills

Certain jobs e.g. operation of cranes and other mechanical equipment, erection of scaffolding

need required skills and persons deployed should be checked for possession of adequate skills

and experience in carrying out such work.

c) Training



Rev. No. 02


Chapter No. 02

32

All required HSE related training e.g. safe evacuation during emergencies, permit to work

requirements, proper use of personal protective equipment, should be provided by the contractor

HSE supervisor. The training contents should be discussed with the ONGC HSE personnel.

d) Personal Protective Equipment (PPE)

No personnel will be allowed into the well site if the required PPE is not used. Adequate stock of

required PPE will be available and distributed whenever needed. The PPE requirements are hard

hat and safety shoe and those working in the drilling rig, overalls, gloves, safety glasses, nose

masks when needed) and ear-muffs. Personnel working at height (during maintenance / erection)

will need to use safety belts securely anchored.

e) General HSE Requirements

The general HSE requirements of ONGC which is strictly complied with by all ONGC and contract

employees are enumerated below.

f) Vehicle Movement

The speed limit for vehicles is 10 kms/hr in village area and near to schools and in construction

area. On tar road maximum speed is restricted to 35 km/hr and on highway speed should not be

more then 60 km/hr for heavy vehicles and 80 km/hr for light vehicle

g) No Smoking Regulations

Smoking is strictly prohibited in all the areas in the site

h) First Aid Center



Rev. No. 02


Chapter No. 02

33

A first aid center shall be located at the construction site. The service of a doctor shall also be

available all the time in the first aid center.

i) Permits

Type of permits agreed should be obtained wherever required. Conditions and precautions

mentioned in the permit should be strictly followed.

j) Fire Extinguishers

Temporary fire extinguishers shall be readily available at convenient locations for use during any

fire emergencies.

All persons working in the contract should be above 18 years of age and no child labor will be

engaged in any job at any time.

k) Safety Seat Belts

All the vehicles used for construction purpose should be provided with safety seat belts. No

vehicles are allowed inside the site without safety seat belts.



Rev. No. 02


Chapter No. 03

1

Chapter 3

DESCRIPTION OF

ENVIRONMENT



Rev. No. 02


Chapter No. 03

2

3.0 Introduction

This chapter illustrates the description of the existing environmental status of the study area with

reference to the prominent environment attributes to assess environmental impacts from the proposed

project activity.

3.1 Baseline environmental Study

The study area was determined through collection of samples followed by quantifying environmental

indicators of air, noise, water, land, ecology and socio-economic status. The baseline environmental

quality has been determined for Summer Season by following guidelines prescribed in MoEF & CC, EIA

notification and ToR issued to the ONGC.

The baseline environmental qualities for the development drilling locations have been assessed for the

following environmental components, which are most likely to be influenced by the drilling activity:

Geology

Hydrology

Seismicity

Land Environment

Ambient Air Quality

Meteorological conditions

Noise levels

Water quality (Surface +Ground water)

Soil quality

Biological and

Socio-economic studies.



Rev. No. 02


Chapter No. 03

3

The primary baseline environmental quality for the EIA is assessed through field studies within the impact

zone for various components of the environment, viz. air, noise, water, Soil and socio-economic.

3.2 Geology

The Cambay Basin is a major NW –SE trending rift graben extending from Gulf of Cambay in south to

Barmer Basin of Rajasthan in North. The evolution of the Basin is broadly divided into two stages i.e,

Late Jurassic to early Cretaceous pre-rift stage and Late Cretaceous-tertiary syn-rift-post rift stage. The

sedimentary fill ranges from Mesozoic to recent alluvium with a volcanic sequence equivalent of Deccan

Traps in between. Based on structural styles, tectonics and structural morphology of Tertiary sedimentary

fills, Cambay Basin has been subdivided into five tectonic blocks. From North to South, they are

Patan-Sanchor Block

Ahmedabad-Mehsana Block

Cambay –Tarapur Block

Jambusar-Broach Block

Narmada-Tapti Block

Mehsana sub-block is the northern segment of Ahmedabad-Mehsana block in North Cambay Basin.

NNW-SSE trending Mehsana horst, subdivides the Mehsana sub-block into two depressions. Majority of

the oil fields except Bechraji lie to the east of Mehsana horst, in the Mehsana-Ahmedabad tectonic block

of the Cambay Basin. The basin came into existence during rifting along N-S to NNW-SSE trend in Late

Jurassic to Early Cretaceous. The two dominant NW-SSE and ENEWSW directions correlate well with

the intra-basinal horsts and grabens.

Mehsana district is located in North Gujarat, about 75 km from Ahmedabad. The district borders with

Banaskantha district in the north, Patan and Surendranagar districts in the west, Gandhinagar and

Ahmedabad districts in the south and Sabarkantha district in the east. Mehsana is divided into nine

talukas. Mehsana, Kadi, Visnagar, Vijapur and Becharaji are the developed talukas of the district.

According to Rodgers and Pawan (1988) classification, India is divided into 10 distinct bio-geographic

zones and further into 26 biotic provinces, based on its biogeography. Out to this, Gujarat has

representation of four bio-geographic zones and five biotic provinces. Mehsana district falls under Zone

4. The Semi-arid Zone: Province 4B - Gujarat - Rajwara, northern alluvial plains of Gujarat mainland.



Rev. No. 02


Chapter No. 03

4

3.3 Hydrology

The hydrogeological studies were carried out to understand the local geology, geomorphic features,

drainage network, aquifer characteristics and yield of water along with various components controlling

the hydrogeological regime.

Precambrian hard rocks, semi-consolidated Mesozoic and tertiary formations and unconsolidated

quaternary alluvial deposits form multi-layer aquifer system in the district. Groundwater occurs both under

phreatic and confined conditions, however its development is restricted depending upon the aquifer

geometry and yield characteristic of individual aquifer and/or ground water quality of the formation water.

Occurrence of groundwater can be divided in two groups.

a) Ground water in fissured formation (Hard rock): The north-eastern part of the district mainly in

Satlasna taluka is occupied by meta sediments and Post Delhi intrusives. The occurrence and movement

of ground water is governed by secondary porosity i.e. thickness and extent of weathering and size&

interconnections of fractures/joints. These formations generally don’t form good aquifer system. The

depth of dugwells range from 15-30 mbgl and of borewells from 100-120 mbgl. Depth to water level in

the dug wells varies from 5 -14mbgl and in borewells from 15to 60 mbgl. The yield of wells range from

30-120m3 /day with an average of 75m3 /day.

b) Groundwater in porous formations (Sedimentaries): Major part of the district is underlain by post

Miocene alluvium and older sedimentary formations. These sediments are mainly consisted by Coarse

sand, gravel, kankar, silt, clay and clay stones. Groundwater occurs both under phreatic and confined

conditions in arenaceous horizons within sedimentaries. The occurrence and movement of groundwater

is mainly controlled by intergranular pore spaces.

3.3.1 Ground Water Resources

The main source of ground water recharge is by the rainfall by direct percolation to the zone of saturation.

A significant part of the rainfall is lost as runoff from area while a limited percentage of rainfall therefore

reaches zone of saturation and becomes the part of ground water storage after meeting the evaporation

and evapo-transpiration losses. There is also ground water recharge from the return flow of irrigation

water from dug wells and tube wells operated by the cultivators and from canals.



Rev. No. 02


Chapter No. 03

5

The ground water levels measured in the study area are given in the Table 3.1

Table 3.1 Ground water levels in district

S.No. Districts Pre-Monsoon Water Level Post Monsoon Water Level

1. Mehsana 2.15 to 34.35 mbgl. 1.10 to 33.77 mbgl.

2. Ahmedabad 1.10 to 33.77 mbgl. 1.06 to 16.52 mbgl

3. Gandhinagar 7.55 to 59.40 mbgl. 6.27 to 59.17 mbgl.

4. Patan 1.70 m to 32.01 mbgl. 1.00 mbgl to 20.98 mbgl.

Source: central ground water board



Rev. No. 02


Chapter No. 03

6

Fig 3.1: Ground water Pre Monsoon level map of Ahmedabad, Mehsana, Gandhinagar and Patan

District



Rev. No. 02


Chapter No. 03

7

Fig 3.2: Ground water Post Monsoon level map of Ahmedabad, Mehsana, Gandhinagar and Patan District



Rev. No. 02


Chapter No. 03

8

3.4 Seismicity and Floods:

Study Area is categorized in the seismic zone III, which is classified as having a fairly high probability of

earthquake shocks measuring 5 or 6 on the Richter scale, low probability of shocks of 6 or 7 on the

Richter scale and Seismic Zone IV which is referred as High damage risk Zone.

Source: Seismic Map of Gujarat from Institute of Seismological Research (Government of

Gujarat.http://www.isr.gujarat.gov.in/Seismic_Zoning_Gujarat.shtm)

Figure-3.3 Seismic Zone Map of India



Rev. No. 02


Chapter No. 03

9

Fig 3.4 : Seismic Zone III of the Study area

3.5 Land Environment

3.5.1 Topography:

The terrain of the district is almost flat plain except a small hilly portion in the eastern part with an elevation

ranging from 57 m to 370 m above MSL. The general slope of this district is from NE to SW. The mining

lease falls in central, SW and southern part of the district which has almost flat terrain.

3.5.2 Land Use Studies

Studies on land use aspects of eco-system play important roles for identifying sensitive issues, if any,

and taking appropriate actions for maintaining the ecological balance in the development of the region.

The objectives of land use studies are:

To determine the present land use pattern;

To analyze the impacts on land use due to proposed project activities in the study area; and

To give recommendations for optimizing the future land use pattern vis-a-vis growth of

proposed project activities in the study area and its associated impacts.

3.5.2.1 Methodology



Rev. No. 02


Chapter No. 03

10

The land use/land cover maps of the study area were obtained from Bhuvan outreach portal of National

Remote Sensing Centre, ISRO. These Land Use Land Cover maps were developed from LULC Vector

data of 2005-06, Multi-temporal satellite data of 2011-12 from Resourcesat-2 LISS III in the scale of

1;50,000. The various steps involved in the study are preparatory field work, field survey and post field

work. The Land Use Land Cover maps were prepared based on the classification system of National

standards. The land use pattern of the Mehsana, Ahmedabad, Patan and Gandhinagar Districts is shown

in Figure 3.5 The main interpreted land use/land cover classes of the Mehsana District and their

respective areas are given in Table 3.1.

Figure 3.5: Land Use pattern of Mehsana (A), Ahmedabad (B), Patan(C) and Gandhinagar (D)

District.

A B

C D



Rev. No. 02


Chapter No. 03

11

Table: 3.2 Land Use classification and area of Mehsana, Ahmedabad, Patan and Gandhinagar District

S.NO Level – 1 Level - 2 Area (Sq. Km)

Mehsana % Ahmedabad % Patan % Gandhinagar %

1 Built-up

Built-up, Urban 39.7

2.69

325.46

4.41

34.47

1.37

30.87

6.26

Built-up, Mining 0.56 0 0 0.2

Built-up, Rural 49.44 58.55 43.1 9.54

2 Agriculture

Agriculture, Plantation 1.98

88.55

11.2

79.65

4.06

85.88

1.02

84.81

Agriculture, Crop land 2840.89 6591.87 4230.81 464.65

Agriculture, Fallow 117.26 331.38 646.6 84.74

3 Forest

Forest, Deciduous 52.19

1.7

0

0.01

0

0.05

0

0

Forest, Scrub Forest 4.83 0 0 0

Forest, Swamp /

Mangroves

0 1.13 2.57 0

4 Wasteland

s

Barren/unculturable/Wast

elands, Gullied/Ravinous

Land

42.1

4.55

0

7.35

0

8.75

5.48

6.6


elands, Scrub land

109.82 461.33 318.64 37.36



Rev. No. 02


Chapter No. 03

12


elands , Salt Affected land

0 143.56 52.39 0


elands, Sandy area

0.05 35.12 0 0


elands, Rann

0 0 125.98 0

5

Water

bodies

Wetlands/Water bodies,

River/Stream /Canals

58.01

2.52

128.91

8.59

94.24

3.96

13.07

2.33

Wetlands/Water Bodies,

Reservoir/Lakes/Ponds

20.73 149.39 96.7 2.08


Inland Wetland

0 394.35 6.89 0


Coastal Wetland

5.45 74.75 27.5 0

TOTAL AREA (Sq. Km.) 3343.00 8707.00 5684.00 649.00

TOTAL AREA (Hectares) 334300 870700 568400 64900

Observations:

Mehsana: The land use pattern of the study area indicates built-up land of 2.69%, land under agriculture is about 88.55%, forest land is about 1.7%, waste land

is about 4.55% and water bodies contribute about 2.52% in the study area.

Ahmedabad: The land use pattern of the study area indicates built-up land of 4.41%, land under agriculture is about 79.65%, waste land is about 7.35% and

water bodies contribute about 8.59% in the study area.



Rev. No. 02


Chapter No. 03

13

Patan: The land use pattern of the study area indicates built-up land of 1.37%, land under agriculture is about

85.88%, waste land is about 8.75% and water bodies contribute about 3.96% in the study area.

Gandhinagar: The land use pattern of the study area indicates built-up land of 6.26%, land under agriculture is

about 84.81%, waste land is about 6.6% and water bodies contribute about 2.33% in the study area.

3.6 Meteorology

The meteorological data recorded during the study period is very useful for proper interpretation of the

baseline information as well as for input to prediction models for air quality dispersion.

On site monitoring was undertaken for various meteorological parameters in order to generate the site

specific data. The central monitoring station (CMS), equipped with continuous monitoring equipment to

record wind speed, wind direction, temperature, humidity and rain fall was set up at the top of the building

at a height of ~ 5.0m above the ground level. The methodology adopted for monitoring surface

observations was as per the Standard norms laid down by the Bureau of Indian Standards (IS:

8829:1978) and IMD.

3.6.1 Meteorological data recorded at study area

The meteorological parameters were recorded at Rupal and Ahmedabad on hourly basis during the study

period from the date 27th April 2018 to 27th July 2018 consist of parameters like Wind speed, Wind

direction, Humidity Temperature and total rainfall. The maximum and minimum values for Temperature

& Humidity are presented in Table 3.3.

TABLE – 3.3: Summary of the Meteorological Data Generated In Study Area

Month

Rupal Ahmedabad

Temp. (0C) Relative

Humidity (%) Rainfall

(mm)

Temp. (0C) Relative

Humidity (%) Rainfall

(mm) Max Min Max Min Max Min Max Min

April 2018(27th to

30th) 40.1 28.2 60 34 0 40.9 28.7 64 30 0



Rev. No. 02


Chapter No. 03

14

May 2018 40.3 28.9 62 30 0 41.6 28.0 61 37 0

June 2018 37.4 27.4 87 45 30 38.1 27.6 87 45 34

July 2018(1st to

27th) 35.5 25.4 94 63 60 35.6 25.7 90 60 60

27th April 2018 to

27th July 2018 40.3 25.4 94 30 90 41.6 25.7 90 30 94

The summary of the wind pattern for the study period is listed in Table-3.4 (a) & (b). The graphical

presentation of the same illustrated from Figure-3.6 (a) to 3.6 (b).

TABLE – 3.4 (a): Summary of Wind Pattern at Rupal

Month First Predominant

Wind Direction Second Predominant Wind

Direction Average Wind Speed

(m/s)

April 2018(27th to 30th) NW W 1.3

May 2018 NW W 1.0

June 2018 NW SW 1.2

July 2018(1st to 27th) NW W 1.1

27th April 2018 to 27th July

2018 NW W 1.1

TABLE – 3.4 (b): Summary of Wind Pattern at Ahmedabad

Month First Predominant

Wind Direction Second Predominant Wind

Direction Average Wind Speed

(m/s)

April 2018(27th to 30th) SW W 1.8

May 2018 W SW 0.8

June 2018 SW WSW 2.3

July 2018 (1st to 27th) SW SSW 1.8

27th April 2018 to 27th July

2018 SW SSW 1.6



Rev. No. 02


Chapter No. 03

15

Figure: 3.6 (a): Windrose Diagram for April-18, May -18, June 18 & July 18 at Rupal

Figure: 3.6(b): Windrose Diagram from April 27TH -2018 to July 27th 2018 at Rupal



Rev. No. 02


Chapter No. 03

16

\

Figure: 3.6 (c): Windrose Diagram for April-18, May -18, June 18 & July 18 at Ahmedabad



Rev. No. 02


Chapter No. 03

17

Figure: 3.6(d): Windrose Diagram from April-2018 to July 27th 2018 at Ahmedabad

3.6.2 Secondary Data from Indian Meteorological Dept., (IMD), Ahmedabad

The nearby India Meteorological Department station that is generating meteorological data nearest to the

study area is IMD, Ahmedabad. Hence, secondary information on meteorological conditions has been

collected from Ahmedabad IMD station. Indian Meteorological Department at Ahmedabad regularly

monitors wind direction, wind speed, relative humidity, temperature and rainfall at 08.30 hours and 17.30

hours every day. Wind rose diagrams (1971-2000) collected for IMD, Ahmedabad is shown in Figure –

3.7(a) & 3.7(b).



Rev. No. 02


Chapter No. 03

18

Figure 3.7(a): Windrose diagrams for the month of April, May, June & July - IMD, Ahmedabad

(1971-2000)



Rev. No. 02


Chapter No. 03

19

Figure 3.7(b): Annual Windrose diagrams from IMD, Ahmedabad (1971-2000)

The month wise mean maximum & minimum values of temperature, relative humidity and rainfall data

collected from IMD, Ahmedabad for the period 1971-2000 are presented in below Table – 3.5.

Table 3.5: WEATHER DATA FROM IMD, AHMEDABAD (1971-2000)

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

Max- Temp (C)

28.1 30.5 35.7 39.7 41.6 38.7 33.5 32.0 33.8 35.7 32.8 29.4

Min Temp (c)

12.0 14.0 19.1 23.7 26.5 27.3 25.7 24.9 24.3 21.3 16.6 13.2

RH (%) 49 42 35 39 45 60 77 79 71 54 47 49

Rainfall (mm)

1.9 1 0.5 2.7 10.2 95 281 234 96 12 4 0.8

Source: IMD, Ahmedabad



Rev. No. 02


Chapter No. 03

20

Figure 3.8: Monthly Average Maximum and Minimum Temperature in ◦C

Figure 3.9: Monthly Average Rainfall in mm and Relative humidity in %

0

5

10

15

20

25

30

35

40

45

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

Tem

p°C

Month

Temperature Max- Temp (C)

Min- Temp (C)

0

50

100

150

200

250

300

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

Rai

nfa

ll (m

m)

Month

Rainfall and Relative Humidity RH (%)

Rainfall (mm)



Rev. No. 02


Chapter No. 03

21

3.7 Ambient Air Quality

A reconnaissance survey was undertaken to identify the sampling locations to establish baseline status

of Ambient Air quality in the study area. The sampling stations were selected based on guidelines of air

monitoring network siting criteria such as:

Topography of the study area

Persistence of wind direction and speed

Representation of regional background

Populated and sensitive areas

Location of industries and their emission magnitude

Screening of maximum ground level concentrations and distances of their likely occurrences as

per climatological normal

Representation of valid cross-sectional distribution in down-wind direction.

3.7.1 Selection of Sampling Locations

The ambient air quality around the location within 10 km radius was monitored at Thirty (30) stations. To

establish the baseline monitoring of air quality in the study area during summer season; Ambient Air

Quality Monitoring stations Thirty (30) were selected using network design criteria and monitored as per

CPCB guidelines.

As per NAAQS (2009) the pollutants viz., particulate matters (PM10 and PM2.5), sulphur dioxide (SO2),

nitrogen dioxide (NO2), carbon monoxide (CO) and ammonia (NH3) were stipulated parameters for air

quality monitoring. All the parameters were monitored on 24 hourly while CO was monitored on hourly

basis. Standard analytical procedures were used for analysis and quantification of air quality parameters

and the details are given in Table 3.6 &3.7. The photographs show in sampling stations/locations are

given in the Figure 3.10.



Rev. No. 02


Chapter No. 03

22

TABLE – 3.6: DETAILS OF AMBIENT AIR QUALITY MONITORING LOCATIONS

Code Location Cordinates Direction & Distance w.r.t centre of block

Description of AAQ Station

AAQ1 Ubkhal 23o34’6.99” N 72o37’38.79” E

ESE -10 Km w.r.t Chalada-Mansa

Rural Settlement, Top of

Ubkhal Panchyat Office

AAQ2 Chadasana 23o33’7.53” N 72o40’35.58” E

NE – 6.44 Km w.r.t Charada Rural Settlement, Top of

Chadasana Panchyat Office

AAQ3 Bilodra 23o31’24.99” N 72o38’59.62” E

ENE – 10 Km w.r.t Chalada-Mansa


Bilodra Panchyat Office

AAQ4 Dilwara 23o30’32.26” N 72o40’58.14” E

NE-4.3 Km w.r.t Charada Rural Settlement, Top of

Dilwara Panchyat Office

AAQ5 Ajol 23o30’32.26” N 72o41’16.2” E

ENE- 5.3Km w.r.t Mansa Rural Settlement, Top of Ajol

Panchyat Office

AAQ6 Lodra 23o27’30.47” N 72o43’1.49” E

ESE- 7.2 Km w.r.t Mansa Rural Settlement, Top of Lodra

Panchyat Office

AAQ7 Ridrol 23o27’32.55” N 72o40’31.41” E

ESE- 5.2 Km w.r.t Mansa Rural Settlement, Top of Ridrol

Panchyat Office

AAQ8 Fatepura 23o55’56.22” N 72o38’12.9” E

SSE- 4.9 Km w.r.t Mansa Rural Settlement, Near

Fatepura Primary School

AAQ9 Kherva 23o32’37.03” N 72o26’38.79” E

SW- 2.2 Km w.r.t East Sobhasan


Kherva Panchyat Office

AAQ10 Lagnaj 23o26’53.30” N 72o29’50.84”E

NNW- 3.3 Km w.r.t Langhnaj-Wadasama


Residential building

AAQ11 Irana 23o18’30.43” N 72o23’18.9” E

ESE- 7.3 Km w.r.t Kadi Rural Settlement, Near Ram

Pir Temple

AAQ12 Rupal 23o41’4.63” N 72o20’36.18” E

NNW- 3.3 Km w.r.t North Sobhasan Ext I

Rural Settlement, Top of Milk

Dairy

AAQ13 Bhadrada 23o49’23.18” N 71o59’37.48” E

NNW- 7.5 Km w.r.t Patan Rural Settlement, Top of Water

Pumping Station

AAQ14 Chandrumana 23o44’47.59” N 72o04’0.1” E

SW – 5.7 Km w.r.t Patan Rural Settlement, Top of

Chandrumana Panchyat Office

AAQ15 Ambaliyasan 23o27’9.35” N 72o25’26.66” E

NE- 2.5 Km w.r.t Linch Rural Settlement, Top of


AAQ16 Linch 23o29’44.95” N 72o22’27.84” E

NE- 2.3 Km w.r.t Warosan Rural Settlement, Top of Linch

Panchyat Office



Rev. No. 02


Chapter No. 03

23

Code Location Cordinates Direction & Distance w.r.t centre of block

Description of AAQ Station

AAQ17 Modhera 23o35’0.32” N 72o82’1.29” E

N- 9.1 Km w.r.t Becharaji Rural Settlement, Top of

Modhera Panchyat Office

AAQ18 Kungher 23o47’48.84” N 72o35’49.1” E

NE- 1.9 Km w.r.t Patan Rural Settlement, Top of

Kungher Panchyat Office

AAQ19 Indrap 23o30’45.26” N 72o83’0.2” E

N- 1.4Km w.r.t Becharaji Rural Settlement, Top of


AAQ20 Nani Rantej 23o24’37.79” N 72o12’1.35” E

WSW- 6.9 Km w.r.t North Kadi Ext (New)

Rural Settlement, Top of Milk

Dairy

AAQ21 Palasar 23o41’54.29” N 72o16’28.65” E

NE- 3.9 Km w.r.t Lanwa Rural Settlement, Top of

Palasar Panchyat Office

AAQ22 Ranuj 23o45’33.91” N 72o13’21.32” E

NNE- 6.1Km w.r.t Chanasma Rural Settlement, Top of Ranuj

Panchyat Office

AAQ23 Tejpura 23o28’3.16” N 72o12’20.47” E

NW- 6.5 Km w.r.t North Kadi Ext (New)



AAQ24 Sunsar 23o38’47.27” N 72o13’42.98” E

NNE- 1.4 Km w.r.t Balol Ext I Rural Settlement, Top of

Sunsar Panchyat Office

AAQ25 Bechrpura 23o37’54.6” N 72o29’56.1” E

ENE-5.9 Km w.r.t North Sobhasan Ext-II

Rural Settlement, Top of Water

Pumping Station

AAQ26 Golapur 23o49’09.09” N 72o07’34.06” E

ENE- 8.0 Km w.r.t Patan Rural Settlement, Top of

Golapur Panchyat Office

AAQ27 Khorsam 23o39’39.67” N 72o3’46.82”E

S- 10 Km w.r.t Patan Rural Settlement, Top of

Khorsam Panchyat Office

AAQ28 Kahanpura 23o28’31.56” N 72o11’47.93” E

NW- 7.1 Km w.r.t Patan North Kadi Ext (New)

Rural Settlement, Near Ram

Temple

AAQ29 Jitoda 23o43’50.85” N 72o08’23.42” E

WNW- 4.3Km w.r.t Lanwa Ext-1

Rural Settlement, Top of Jitoda

Panchyat Office

AAQ30 Shapawada 23o33’6.25” N 72o01’0.57” E

NW- 9.1 Km w.r.t Becharaji Rural Settlement, Top of

Shapawada Panchyat Office

3.7.2 Frequency and Parameters for Sampling



Rev. No. 02


Chapter No. 03

24

Ambient air quality monitoring was carried out at a frequency of two days per week at each location for

continuous three months. The baseline data of air environment was generated for the parameters namely

Particulate Matter size less than 10 µm (PM10), Particulate Matter size less than 2.5 µm (PM2.5), Sulphur

dioxide (SO2), Oxides of Nitrogen (NOx), Carbon Monoxide (CO), Volatile Organic Compounds (VOCs),

Hydrocarbon (Methane& Non-Methane) and Hydrogen Sulphide (H2S).

3.7.3 Instruments used for Sampling

Respirable Dust Samplers APM 460 BL of Envirotech, Fine Particulate Samplers APM 550 of Envirotech

& Combo PM10 & PM 2.5 sampler AAS 271 of Envirotech were used for monitoring the Particulate matter

PM10 & PM 2.5. The Gaseous pollutant samplers AAS 109 of Ecotech or APM 411 along with APM 460

Envirotech were used for sampling of gaseous parameters like SO2, NOx, H2S, VOCs & HC. Carbon

Monoxide was measured using electro chemical sensor method. The instruments used for monitoring are

periodically calibrated every year or after in case of any repair.

3.7.4 Sampling and Analytical Techniques

The sampling and analytical techniques used for the monitoring of Ambient Air quality is given in Table

3.7. The power supply for the operation of AAQ instruments were utilized from either residential or

commercial buildings nearest to each AAQ station.

TABLE – 3.7: Techniques used for Ambient Air Quality Monitoring

S.No Parameter Technique Technical Protocol Detectable

Limit

1 Particulate Matter of size

less than 10 µm (PM10)

Gravimetric method IS 5182 Pt.23 : 2006

(Reaff. 2017) 5 g/m3

2 Particulate Matter of size

less than 2.5 µm (PM2.5)

Gravimetric method EPA- 40 Appendix L

To CFR PART 50 5 g/m3

3 Sulphur dioxide (SO2) Improved West and Gaeke IS 5182: Part 2:2001

(Reaff. 2017) 5 g/m3

4 Oxides of Nitrogen (NOx) Modified Jacob &

Hochheiser

IS 5182: Part 6:2006

(Reaff. 2017) 5 g/m3

5 Carbon monoxide (CO) Non Dispersive Infra Red

(NDIR) Spectroscopy

IS 5182:Part 10 :1999

(Reaff. 2014) 0.1 mg/m3



Rev. No. 02


Chapter No. 03

25

6 Hydrogen Sulphide (H2S) Colorimetry Method IS 5182: Part 7:1973

(Reaff.2014) 5 µg/m3

7 VOCs & BTX GC-MS/MS ABCTL/INS/SOP/035 1 µg/m3

8 Methane HC GC FID ABCTL/INS/SOP/038 0.1 µg/m3

9 Non-Methane HC GC FID ABCTL/INS/SOP/038 0.1 µg/m3

The study area map covering the Ambient Air Quality Monitoring station is depicted in Figure – 3.11

Fig 3.10: Ambient Air monitoring Locations of the Study Area

3.7.5 Ambient Air Quality Results

Ambient air quality results of PM10, PM2.5, Sulphur Dioxide, Oxides of Nitrogen, Carbon Monoxide,

Methane and Non-Methane Hydrocarbon are given in Annexure-IV. Hydrogen Sulphide, Volatile Organic

Compounds and BTX (Benzene, Toluene and Xylene) was not observed in the study Area.

3.7.6. Summary of Ambient Air Quality Result

AAQ Monitoring Stations



Rev. No. 02


Chapter No. 03

26

Summary of ambient air quality results of PM10, PM2.5, Sulphur Dioxide, Oxides of nitrogen, Carbon

monoxide, Methane and Non-Methane Hydrocarbon are summarized in Table 3.8. Volatile Organic

Compounds, BTX (Benzene, Toluene and Xylene), Methane and Non Methane Hydrocarbons were not

reported in study Area.



Rev. No. 02


Chapter No. 03

27

TABLE-3.8: Summary of Ambient Air Quality Monitoring Results

AAQ

Location

PM10 µg/m3 PM2.5 µg/m3 SO2 µg/m3 NOx µg/m3 CO mg/m3

Min Max Mean 98%le Min Max Mean 98%le Min Max Mean 98%le Min Max Mean 98%le Min Max Mean 98%le

Ubkhal 49.4 67.8 57.8 66.5 20.5 34.2 27.1 34.2 5.6 9.4 6.9 9.9 9.7 20.3 14.6 20.2 0.11 0.26 0.18 0.26

Chadasana 48.6 62.3 56.8 62.0 19.5 30.4 24.7 29.8 5.6 8.2 6.7 8.1 18.1 31.6 24.0 30.9 0.19 0.40 0.27 0.37

Bilodra 52 75.4 63.9 73.5 20.1 45.1 28.4 42.9 5.9 9.8 6.9 9.3 10.1 24.6 16.7 23.7 0.21 0.39 0.28 0.38

Dilwara 52.1 70.4 64.1 70.3 24.6 39.5 30.0 39.0 5.2 6.8 6.0 6.7 11.9 19.7 16.1 19.4 0.12 0.20 0.15 0.20

Ajol 49.8 70.5 62.1 70.1 18.6 31.6 24.1 31.1 5.9 11.2 8.1 11.1 10.9 19.6 16.5 19.5 0.11 0.19 0.15 0.19

Lodra 50.1 72.8 59.4 71.1 21.3 34.1 25.6 32.9 5.9 8.6 7.0 8.5 9.0 19.5 13.4 18.4 0.11 0.26 0.18 0.25

Ridrol 50.1 69.4 61.5 68.9 21.5 29.4 25.1 29.3 5.2 6.8 5.8 6.8 9.6 13.9 11.5 13.7 0.11 0.19 0.15 0.18

Fatepura 41.2 62.3 54.5 62.0 21.3 35.4 27.0 33.7 5.2 7.7 6.5 7.7 10.1 12.8 11.3 12.8 0.11 0.19 0.15 0.19

Kherva 52.1 80.4 65.6 76.4 19.8 38.9 27.8 35.7 5.1 7.4 5.8 7.0 9.5 19.7 12.7 19.3 0.11 0.23 0.15 0.23

Lagnaj 45.9 67.8 58.6 67.0 21.7 29.5 24.5 28.5 5.3 6.8 6.0 6.8 9.5 14.5 11.5 14.3 0.11 0.19 0.15 0.18

Irana 54.8 70.5 62.2 68.8 21.9 30.8 26.0 30.2 5.1 7.9 6.4 7.7 10.6 17.8 14.8 17.7 0.10 0.19 0.15 0.19

Rupal 51.9 69.3 60.6 67.8 19.8 31.8 24.3 31.1 5.1 6.4 5.8 6.4 9.3 19.7 12.7 18.4 0.10 0.21 0.15 0.20

Bhadrada 53.9 70.4 61.1 70.1 21.5 35.1 26.9 33.8 5.1 6.5 5.9 6.5 9.5 15.6 12.9 15.5 0.10 0.19 0.15 0.19

Chandrumana 50.1 73.4 60.0 72.7 21 36.8 26.3 35.6 5.3 8.6 6.5 8.3 9.9 20.1 14.8 19.7 0.11 0.24 0.16 0.23

Ambaliyasan 41.3 57.8 50.2 57.5 22.3 31.4 27.1 31.3 5.1 6.9 5.8 6.8 9.9 14.6 11.9 14.1 0.11 0.19 0.15 0.19



Rev. No. 02


Chapter No. 03

28

Linch 41.2 60.4 53.9 60.3 22.3 35.4 25.1 32.8 5.3 10.8 6.4 10.1 9.5 12.8 11.4 12.8 0.11 0.19 0.14 0.19

Modhera 40.9 60.1 51.5 60.1 20.3 29.3 24.3 28.2 5.2 6.2 5.7 6.1 9.0 12.1 10.4 11.9 0.10 0.19 0.15 0.19

Kungher 52.6 70.1 63.3 69.8 19.4 34.3 26.0 34.1 6.1 10.1 8.6 10.0 9.9 14.5 11.6 13.9 0.12 0.20 0.16 0.20

Indrap 41.3 60.5 54.6 60.3 19.7 28.1 23.2 27.3 7.1 10.1 8.7 10.0 9.7 12.9 11.4 12.9 0.11 0.20 0.15 0.20

Nani Rantej 59.1 72.5 65.0 71.1 21.4 40 30.2 39.5 5.1 6.3 5.8 6.2 9.1 11.8 10.5 11.7 0.10 0.20 0.15 0.20

Palasar 45.9 66.2 57.7 64.6 19.8 38.9 24.3 35.7 5.2 6.6 5.8 6.5 9.4 15.9 11.3 14.9 0.10 0.19 0.13 0.19

Ranuj 58.2 71.0 63.7 70.5 22.5 34.6 26.3 34.1 5.1 7.2 5.7 6.9 9.5 21.6 14.8 21.2 0.10 0.23 0.16 0.22

Tejpura 55.8 68.9 60.6 67.6 21.5 34.7 26.1 32.9 5.2 7.5 6.2 7.4 10.1 15.2 12.1 15.2 0.10 0.18 0.14 0.18

Sunsar 52.5 69.9 61.4 69.4 23.1 33.1 27.7 33.0 6.4 14.1 9.9 13.8 5.7 7.3 6.3 7.1 0.11 0.19 0.15 0.19

Bechrpura 59.1 70.2 67.3 70.2 28.7 41.3 33.9 41.1 8.4 13.6 10.6 13.5 10.9 20.8 16.3 20.3 0.12 0.21 0.16 0.20

Golapur 59.7 72.5 65.0 71.4 30.0 41.5 34.1 40.9 5.2 10.1 7.1 9.8 10.1 13.7 11.4 13.6 0.11 0.19 0.16 0.19

Khorsam 59.3 70.2 63.2 69.0 21.6 39.5 30.9 39.4 5.2 7.6 6.4 7.5 9.8 13.6 11.4 13.6 0.10 0.20 0.14 0.18

Kahanpura 56.2 71.4 64.5 71.0 24.5 40.8 30.0 40.4 5.1 6.6 5.8 6.5 10.1 13.5 11.8 13.5 0.10 0.19 0.15 0.19

Jitoda 58.1 69.6 63.8 69.3 29.6 40.5 33.4 39.9 5.1 6.6 5.7 6.5 9.6 14.6 11.5 14.1 0.10 0.20 0.15 0.20

Shapawada 41.3 70.1 56.0 69.4 22.1 45.1 29.0 42.9 5.1 6.3 5.6 6.3 9.6 13.4 11.3 13.4 0.12 0.19 0.15 0.19

NAAQ

Standards 100 60 80 80 2



Rev. No. 02


Chapter No. 03

29

3.7.7 Observations: The data collected was subjected to statistical analysis like minimum, maximum, average and standard deviation. The observed ambient air

quality data within the study area from the project site is reported described briefly

PM10: The maximum and minimum concentrations for PM10 were recorded as

80.4 g/m3 and 40.9 g/m3 respectively. The maximum concentration was recorded at the Kherva and the minimum concentration was recorded at Modhera. The

average concentrations were ranged between 50.2g/m3 – 67.3 g/m3.

Fig3.11: Particulate Matter (PM 10) of the Sampling locations

0

10

20

30

40

50

60

70

80

90

Co

nce

ntr

atio

n µ

g/m

3

Sampling Locations

Particulate Matter PM10

Min

Max

Mean

98%le



Rev. No. 02


Chapter No. 03

30

PM2.5: The maximum and minimum concentrations for PM2.5 were recorded as 45.1 g/m3 and 18.6 g/m3 respectively. The maximum concentration was

recorded at Shapawada and Bilodra and the minimum concentration was recorded at Ajol. The average values were observed to be in the range of

23.2g/m3.– 34.1 g/m3.

Fig 3.12: Particulate Matter (PM 2.5) of the Sampling locations

0

5

10

15

20

25

30

35

40

45

50

Co

nce

ntr

atio

n µ

g/m

3

Sampling Locations

Particulate Matter 2.5Min

Max

Mean

98%le



Rev. No. 02


Chapter No. 03

31

SO2: The maximum SO2 concentrations were recorded were recorded as 14.1 g/m3 and 5.1 g/m3 respectively. The maximum concentration was

recorded at Sunsar and the minimum concentration was recorded at most of the location. The average values were observed to be in the range of 5.6

g/m3.– 10.6 g/m3.

Fig 3.13: Sulphur di oxide (SO2) of the Sampling locations

0

2

4

6

8

10

12

14

16

Co

nce

ntr

atio

n µ

g/m

3

Sampling Locations

Sulphur di oxide (SO2)Min

Max

Mean

98%le



Rev. No. 02


Chapter No. 03

32

NOX: The maximum and minimum NOX concentrations were recorded were recorded as 31.6 g/m3 and 5.7 g/m3 respectively. The maximum

concentration was recorded at Chadasana and the minimum concentration was recorded at Sunsar. The average values were observed to be in the range

of 6.3 g/m3 to 24 g/m3.

Fig 3.14: Oxides of Nitrogen (NOx) of the Sampling locations

0

5

10

15

20

25

30

35

Co

nce

ntr

atio

n µ

g/m

3

Sampling Locations

Oxides of Nitrogen (NOx)

Min

Max

Mean

98%le



Rev. No. 02


Chapter No. 03

33

CO : The maximum and minimum CO concentrations were recorded as 0.4 mg/m3 and 0.10 mg/m3 respectively. The maximum concentration was

recorded at Chadasana and the minimum concentration was recorded at most of the locations. The average values were observed to be in the range

between 0.13 mg/m3 to 0.28 mg/m3.

Fig 3.15: Carbon mono oxide (CO) of the Sampling location

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

Co

nce

ntr

atio

n m

g/m

3

Sampling Locations

Carbon mono oxide (CO)

Min

Max

Mean

98%le



Rev. No. 02


Chapter No. 03

34

AJOL UBKHAL

RUPAL MEHSANA

SHAPAWADA BECHURPURA

Fig 3.16: Air monitoring sampling Locations



Rev. No. 02


Chapter No. 03

35

VOCs & BTX : The VOCs & BTX concentrations at all station in the study area were observed to below the

detection limit of 1 g/m3.

Methane HC: The Methane HC concentrations at all station in the study area were observed to be below

the detection limit of 0.1 g/m3.

Non Methane HC: The Non-Methane HC concentrations at all station in the study area were observed to

be below the detection limit of 0.1 g/m3.

The overall concentrations of PM10, PM2.5, SO2, NOX and CO were observed to be well within the standards

prescribed by Central Pollution Control Board (CPCB) for Industrial, Rural, Residential and other area.

3.8 Noise Environment

Noise can be defined as unwanted sound or any sound that is undesirable because it interferes with

speech and hearing, is intense enough to damage hearing or is otherwise annoying. From the noise

source, natural or man-made barriers between the source and the impacted population, weather

conditions which could potentially absorb, reflect, or focus sound (such as wind speed, direction,

temperature inversions), and the scale of industrial activity. The environmental impact of noise can vary

from noise induced hearing loss (NIHL) to annoyance depending on the loudness of noise levels and

tolerance levels of individual.

3.8.1 Methodology for Noise Monitoring

The sound level meter of HTC was used for measuring the Sound Pressure Level (SPL). Sound Pressure

Level (SPL) measurements were recorded at the specified locations continuously for 24 hours. The day

noise levels were recorded between 6 and 10 pm and night noise levels were recorded between 10 pm

and 6 am at all locations.

3.8.2 Details of Noise Monitoring Locations & Presentation of Results

To quantify noise levels in the study area i.e., 1 km radius from the location, the following criteria was

followed to select sampling stations during field reconnaissance.

Human settlements near the location, which can be affected



Rev. No. 02


Chapter No. 03

36

Locations of Industrial, residential, commercial, and silence zones in the study area, as per the

CPCB guidelines.

Based on the reconnaissance, the noise quality monitoring stations were identified within the study total

360 locations have been monitored as shown in Figure 3.17; the details of the locations are given in

Table 3.8.

Noise Monitoring Stations

Figure – 3.17: Map showing Noise Monitoring Station



Rev. No. 02


Chapter No. 03

37

TABLE-3.9: AMBIENT NOISE LEVEL MONITORING LOCATIONS AND RESULTS

Location

Code Name of the Location

Coordinates Classification of Location

Lday

[dB(A)]

Lnight

[dB(A)]

Leq

[dB(A)]

Standard*

Latitude Longitude Day Night

N1 Near Mahakali Dham Akba 23°28'5.62"N 72° 7'48.86"E Residential Area 47.9 41.9 46.7 55 45

N2 1.7 Km NNW from Dabhasar 23°27'9.62"N 72° 8'45.52"E Residential Area 49.9 42.0 48.5 55 45

N3 Dabhasar 23°26'19.39"N 72° 8'44.04"E Residential Area 49.3 41.7 47.9 55 45

N4 Near Indrap(1 Km WWN) 23°30'13.54"N 72° 7'34.20"E Residential Area 48.7 42.0 47.4 55 45

N5 Karanpura 23°30'36.35"N 72° 9'45.00"E Residential Area 50.2 41.2 48.7 55 45

N6 Near Jogomaya Mandir(1.26 km N) 23°31'25.53"N 72° 8'24.58"E Residential Area 51.0 40.2 49.4 55 45

N7 Near Gangva Kuvani Sikotarma Temple 23°32'40.23"N 72° 6'35.88"E Residential Area 48.3 39.6 46.8 55 45

N8 Near Dharpura Khant 23°31'42.27"N 72° 6'7.77"E Residential Area 48.9 41.2 47.5 55 45

N9 Near Kalri 23°31'6.76"N 72° 4'51.31"E Residential Area 51.2 41.6 49.7 55 45

N10 Delvada Khant 23°32'24.50"N 72° 5'51.47"E Residential Area 54.5 42.0 52.7 55 45

N11 Near Chadsna 23°30'48.08"N 72° 6'18.62"E Residential Area 53.2 41.1 51.6 55 45

N12 Near Dethali bus stop 23°28'44.55"N 72° 7'9.76"E Residential Area 53.6 42.0 52 55 45

N13 Rantej 23°28'47.23"N 72° 9'36.45"E Residential Area 53.7 41.4 52.1 55 45

N14 Near Lakhnechi mata Mandir 23°38'46.38"N 72°14'1.98"E Residential Area 54.2 41.7 52.6 55 45

N15 Near Goga maharaj Temple 23°38'20.51"N 72°12'44.76"E Residential Area 53.3 41.3 51.7 55 45



Rev. No. 02


Chapter No. 03

38

N16 Kakasana 23°37'39.18"N 72°14'3.26"E Residential Area 53.7 41.4 52.1 55 45

N17 Bhalgamda 23°37'6.09"N 72°12'41.34"E Residential Area 53.5 40.8 51.9 55 45

N18 Near Kakasana 23°37'14.52"N 72°13'59.80"E Residential Area 53.6 42 52 55 45

N19 Near Kanoda 23°36'59.59"N 72°14'31.39"E Residential Area 54.3 41.6 52.7 55 45

N20 Near Dudhsagar Dairy Kakasana 23°38'25.36"N 72°15'33.59"E Industrial Area 52.9 40.9 51.3 75 70

N21 Near Motap 23°36'52.48"N 72°15'42.85"E Residential Area 53 41.7 51.4 55 45

N22 Sadhutla Bus Stop 23°35'49.99"N 72°15'1.46"E Residential Area 54.9 41.3 53.2 55 45

N23 Near Gamanpura 23°32'58.62"N 72°16'11.13"E Residential Area 53.1 40.4 51.5 55 45

N24 Near Mitha Balol Conecting Road 23°32'8.39"N 72°16'28.02"E Residential Area 54.1 41.3 52.5 55 45

N25 Near SH 216 23°32'8.51"N 72°17'47.45"E Commercial Area 54.1 41.9 52.5 65 55

N26 Mitha 23°32'42.80"N 72°17'17.90"E Residential Area 53.3 39.8 51.6 55 45

N27 Near Gujarat State Highway 218 23°37'44.63"N 72°33'41.18"E Residential Area 52.8 40.5 51.2 55 45

N28 Near Visnagar Mansa Road 23°36'1.70"N 72°35'44.35"E Residential Area 52.8 41.4 51.2 55 45

N29 Lacchadi 23°36'13.64"N 72°33'14.13"E Residential Area 54.8 42 53.2 55 45

N30 Ashanpura 23°35'40.53"N 72°38'7.98"E Residential Area 52.2 41.5 50.6 55 45

N31 Near Ambaji Temple 23°34'9.05"N 72°31'6.00"E Residential Area 54.4 41 52.7 55 45

N32 Near Dabala Circular 23°33'9.71"N 72°33'26.77"E Residential Area 54.9 42 53.2 55 45

N33 Near Kamalpur Padhariya link Road 23°32'28.88"N 72°31'34.69"E Residential Area 54.7 41 53 55 45

N34 Near Muslan 23°30'53.29"N 72°29'22.73"E Residential Area 53.4 41.9 51.8 55 45



Rev. No. 02


Chapter No. 03

39

N35 Near Vasai 23°31'45.50"N 72°33'38.55"E Commercial Area 54.0 41.8 52.4 65 55

N36 Kukarwada 23°33'26.42"N 72°37'14.92"E Commercial Area 54.1 41.5 52.5 65 55

N37 Near Dhandusan 23°30'0.48"N 72°33'24.63"E Residential Area 53.1 41.7 51.5 55 45

N38 Bilodra 23°31'40.02"N 72°38'58.92"E Residential Area 53.5 41.6 51.9 55 45

N39 Near Harnahoda 23°29'55.17"N 72°35'56.09"E Residential Area 53.2 41 51.6 55 45

N40 Near Motipura 23°32'10.62"N 72°36'20.41"E Residential Area 54.2 41.9 52.6 55 45

N41 Akhaj 23°29'10.84"N 72°27'40.30"E Residential Area 54.6 41.1 52.9 55 45

N42 Sanganpur 23°30'56.82"N 72°26'59.43"E Residential Area 54.4 41.3 52.7 55 45

N43 Near SH 217 23°29'58.29"N 72°27'37.94"E Residential Area 54.5 41.1 52.8 55 45

N44 Near Muslan S-73 Highway 23°31'19.59"N 72°28'30.46"E Residential Area 52.4 41.8 50.8 55 45

N45 Kherva 23°32'43.11"N 72°26'25.06"E Residential Area 55.2 40.3 53.5 55 45

N46 Badalpura 23°28'58.60"N 72°30'30.86"E Residential Area 53.3 41 51.7 55 45

N47 Near udalpur Link Road 23°33'28.41"N 72°29'25.30"E Residential Area 53.3 41.9 51.7 55 45

N48 Near Padharia 23°31'6.46"N 72°31'34.70"E Residential Area 53.6 41.3 52 55 45

N49 Langhanaj 23°27'2.13"N 72°29'38.98"E Commercial Area 53.8 41 52.2 65 55

N50 Gozaria 23°28'29.66"N 72°33'47.01"E Commercial Area 54.4 42 52.8 65 55

N51 Amarpura 23°27'32.86"N 72°35'7.80"E Residential Area 52.9 41.9 51.3 55 45

N52 Boru 23°24'51.90"N 72°34'51.06"E Residential Area 53.2 40.5 51.6 55 45

N53 Saldi 23°25'27.58"N 72°31'38.51"E Residential Area 54.0 40.4 52.3 55 45



Rev. No. 02


Chapter No. 03

40

N54 Dhameda 23°27'49.17"N 72°38'45.94"E Residential Area 54.9 41.9 53.2 55 45

N55 Charada 23°29'8.39"N 72°39'1.07"E Commercial Area 52.1 41.8 50.5 65 55

N56 Patanpura 23°28'30.82"N 72°41'30.14"E Residential Area 53.9 41.2 52.3 55 45

N57 Mahudi 23°29'44.87"N 72°46'39.25"E Residential Area 54.6 41.7 52.9 55 45

N58 Delvada 23°30'45.07"N 72°40'54.03"E Commercial Area 54.1 40.2 52.4 65 55

N59 Sarsav 23°43'3.09"N 72°11'53.93"E Residential Area 54.4 39.8 52.7 55 45

N60 Pimpal 23°41'40.35"N 72°11'37.27"E Residential Area 55.3 40.7 53.6 55 45

N61 Devgadh 23°29'35.34"N 72° 5'59.13"E Commercial Area 53.7 40.3 52 65 55

N62 Devrasan 23°33'47.55"N 72°26'49.30"E Residential Area 55.1 40.1 53.4 55 45

N63 Gunjala 23°34'17.65"N 72°27'55.53"E Residential Area 53.4 40.2 51.7 55 45

N64 Jagudan 23°30'49.26"N 72°24'57.72"E Residential Area 54.1 40.4 52.4 55 45

N65 Kochava 23°30'15.54"N 72°25'9.34"E Residential Area 52.8 40.1 51.2 55 45

N66 Near BS Patel Pharmacy College SH41 23°28'59.56"N 72°23'48.82"E Residential Area 54.5 40.0 52.8 55 45

N67 Bhakadia 23°29'22.05"N 72°25'48.87"E Commercial Area 54.6 40.1 52.9 65 55

N68 Baliasan 23°27'20.50"N 72°23'40.94"E Residential Area 54 39 52.3 55 45

N69 Palwasana Part 23°33'20.60"N 72°22'4.03"E Residential Area 55.7 38.5 54 55 45

N70 Mehsana 23°35'8.55"N 72°22'11.44"E Commercial Area 53.2 41.7 51.6 65 55

N71 Jotana 23°28'13.68"N 72°17'31.92"E Residential Area 52.9 38.8 51.2 55 45

N72 Ranipura 23°27'34.55"N 72°18'59.79"E Residential Area 54.3 38.9 52.6 55 45



Rev. No. 02


Chapter No. 03

41

N73 Lijpura Jethaji 23°26'32.20"N 72°17'25.93"E Residential Area 53.7 38.7 52 55 45

N74 Memadpur 23°25'23.77"N 72°18'7.51"E Residential Area 54.5 39 52.8 55 45

N75 Jakasana 23°26'18.89"N 72°18'48.70"E Residential Area 54.2 38.4 52.5 55 45

N76 Near Mudarada 23°26'6.71"N 72°19'54.76"E Residential Area 54.7 38.9 53 55 45

N77 Near Mudarada Railway Stn 23°25'38.84"N 72°20'8.33"E Residential Area 54.5 38.8 52.8 55 45

N78 Between Mudarada and Memadpur 23°25'22.49"N 72°18'56.69"E Residential Area 54.1 38.9 52.4 55 45

N79 Manknaj 23°30'30.05"N 72°18'53.12"E Commercial Area 52.4 39.2 50.7 65 55

N80 Ganeshpura 23°38'6.04"N 72°19'8.61"E Residential Area 53.8 39 52.1 55 45

N81 Ambassan 23°28'44.78"N 72°20'54.56"E Residential Area 51.5 38.9 49.9 55 45

N82 Linch 23°29'53.78"N 72°22'38.08"E Residential Area 53.1 42 51.5 55 45

N83 Divanpura 23°26'39.06"N 72°21'13.11"E Residential Area 53.7 41.9 52.1 55 45

N84 Khadalpur 23°27'24.81"N 72°20'1.26"E Residential Area 54.8 41.7 53.1 55 45

N85 Suraj 23°23'30.41"N 72°18'18.20"E Commercial Area 53.9 41.8 52.3 65 55

N86 Rajpura 23°24'30.51"N 72°15'20.99"E Residential Area 53.4 41.4 51.8 55 45

N87 Bamroli 23°23'57.78"N 72°16'16.31"E Residential Area 53.6 41.9 52 55 45

N88 Dangarva 23°23'0.72"N 72°14'45.49"E Commercial Area 53 41.1 51.4 65 55

N89 Nani Kadi Part 23°16'9.03"N 72°19'22.20"E Residential Area 54.4 41 52.7 55 45

N90 Kadi Railway Stn 23°17'32.31"N 72°19'30.99"E Residential Area 53.4 40.1 51.7 55 45

N91 Near RG Patel Genrl nursing School 23°16'57.49"N 72°19'29.50"E Residential Area 53.1 40.8 51.5 55 45



Rev. No. 02


Chapter No. 03

42

N92 Sujatpura 23°16'57.01"N 72°18'6.80"E Residential Area 53.8 40 52.1 55 45

N93 Anondara 23°20'26.48"N 72°18'45.43"E Residential Area 53.9 39.9 52.2 55 45

N94 Juni Sedhiba 23°24'22.36"N 72°26'49.20"E Residential Area 53.7 41.8 52.1 55 45

N95 Vadasma 23°24'36.37"N 72°29'17.78"E Commercial Area 53.1 41.1 51.5 65 55

N96 Chhatral City 23°17'30.27"N 72°26'43.53"E Commercial Area 53.7 41.5 52.1 65 55

N97 Mandali 23°25'45.11"N 72°23'56.84"E Residential Area 52 41.7 50.4 55 45

N98 Deusana 23°20'35.34"N 72°16'36.98"E Residential Area 53.5 41.4 51.9 55 45

N99 Jasalpur 23°21'37.35"N 72°20'24.01"E Residential Area 53.3 41.2 51.7 55 45

N100 Digdi 23°22'8.44"N 72°17'52.89"E Residential Area 52.6 41.5 51 55 45

N101 Rajpur 23°19'55.88"N 72°24'11.01"E Residential Area 52.3 41.9 50.7 55 45

N102 Irana 23°18'46.63"N 72°23'2.67"E Residential Area 52 40.5 50.4 55 45

N103 Ganget 23°43'35.70"N 72°10'29.33"E Residential Area 53.1 41.1 51.5 55 45

N104 Keshani 23°42'37.25"N 72°10'40.59"E Residential Area 54.1 41.4 52.5 55 45

N105 Near Shelavi Stn 23°42'14.61"N 72°15'11.53"E Residential Area 53.6 41.8 52 55 45

N106 Dhinoj 23°39'43.19"N 72°16'44.41"E Residential Area 53.8 41.7 52.2 55 45

N107 Lanva 23°41'2.23"N 72°14'40.26"E Residential Area 54.8 42 53.2 55 45

N108 Muthania 23°40'35.21"N 72°15'28.48"E Residential Area 51.1 41.9 49.6 55 45

N109 Kharadharava 23°40'58.59"N 72°13'22.84"E Residential Area 54.1 41.2 52.4 55 45

N110 Lakhavad 23°35'17.54"N 72°25'17.57"E Residential Area 52.9 41.4 51.3 55 45



Rev. No. 02


Chapter No. 03

43

N111 Rampura Bus Stop 23°33'50.87"N 72°25'29.68"E Residential Area 53.2 41.8 51.6 55 45

N112 On SH73(1.4km N from Rampura Bus

Stop) 23°34'33.18"N 72°25'23.96"E

Residential Area 54.2 41.7 52.6 55 45

N113 Detrojpura 23°35'22.26"N 72°26'55.51"E Residential Area 54.3 41.4 52.6 55 45

N114 Lalavai Park 23°37'9.14"N 72°23'4.83"E Residential Area 52.5 41.5 50.9 55 45

N115 Bhagyoday Co-op Housing 23°35'36.03"N 72°23'28.98"E Residential Area 52.8 41.6 51.2 55 45

N116 Shakti Nagar 23°35'55.27"N 72°23'40.26"E Residential Area 52.4 41.7 50.8 55 45

N117 Ucharapi Rd 23°36'0.71"N 72°24'29.44"E Commercial Area 52.3 41.8 50.7 65 55

N118 Harnahoda Bus Station 23°30'11.74"N 72°35'1.26"E Residential Area 53.8 41.6 52.2 55 45

N119 Mansa 23°26'0.66"N 72°39'23.37"E Commercial Area 53 42 51.4 65 55

N120 Shalin Society 23°25'1.00"N 72°38'45.78"E Residential Area 52.4 41.9 50.8 55 45

N121 Patanpura 23°28'49.45"N 72°41'25.13"E Residential Area 54.6 40.8 52.9 55 45

N122 Padusama 23°29'19.17"N 72°37'20.25"E Residential Area 53.2 41.8 51.6 55 45

N123 Itadara 23°26'15.78"N 72°36'20.43"E Residential Area 52.9 41.9 51.3 55 45

N124 Galthara 23°26'18.04"N 72°41'36.26"E Residential Area 54.2 42.3 52.6 55 45

N125 Ridrol 23°27'34.75"N 72°40'32.09"E Commercial Area 52.9 41.6 51.3 65 55

N126 Gorad 23°41'6.02"N 72°20'50.33"E Residential Area 53.6 41.7 52 55 45

N127 Ramdavnagar 23°36'49.50"N 72°24'10.85"E Residential Area 51.9 41.5 50.3 55 45

N128 Patidarnagar 23°36'10.22"N 72°24'15.74"E Residential Area 54.4 41.6 52.8 55 45



Rev. No. 02


Chapter No. 03

44

N129 Ucharpi 23°36'20.74"N 72°25'46.11"E Residential Area 54 41.8 52.4 55 45

N130 Kantharvi 23°43'11.01"N 72°20'27.72"E Residential Area 54.3 41.7 52.7 55 45

N131 Ganeshpura 23°24'16.62"N 72°23'25.98"E Residential Area 53.9 41.8 52.3 55 45

N132 Mathasur 23°23'4.33"N 72°22'15.74"E Residential Area 54.9 40.9 53.2 55 45

N133 Kadi-nandsan Road 23°21'48.90"N 72°23'11.72"E Residential Area 53.3 41.5 51.7 55 45

N134 Anandpura road 23°22'59.20"N 72°25'41.31"E Residential Area 53.1 41.6 51.5 55 45

N135 Nandasan 23°22'16.59"N 72°24'29.36"E Commercial Area 53.5 41.9 51.9 65 55

N136 Takia 23°23'54.10"N 72°26'55.18"E Residential Area 54.1 41.8 52.5 55 45

N137 Hadvi 23°23'51.24"N 72°28'3.20"E Residential Area 52.4 39.9 50.8 55 45

N138 Bhimpura 23°23'31.25"N 72°38'10.10"E Residential Area 53.6 41.7 52 55 45

N139 Kayial 23°23'57.71"N 72°25'39.06"E Residential Area 53.7 40.2 52 55 45

N140 Near Dangarva 23°22'54.02"N 72°27'37.93"E Commercial Area 52.8 41.7 51.2 65 55

N141 Kungher 23°47'51.94"N 72° 4'8.27"E Residential Area 51.7 41.5 50.1 55 45

N142 Galolivasna 23°45'25.05"N 72° 4'29.51"E Residential Area 54.2 41.6 52.6 55 45

N143 Bhalgam 23°46'21.86"N 72° 2'32.80"E Residential Area 51.1 41.8 49.6 55 45

N144 Adiya 23°46'56.10"N 72° 0'47.81"E Residential Area 51.4 41.9 49.9 55 45

N145 Kharivavdi 23°48'42.58"N 72° 3'44.38"E Residential Area 51.5 41.7 50 55 45

N146 Khanpur Rajkuva 23°47'45.40"N 72° 1'43.11"E Residential Area 52.7 41.1 51.1 55 45

N147 Chanasma 23°43'7.10"N 72° 7'12.23"E Commercial Area 53.6 41.4 52 65 55



Rev. No. 02


Chapter No. 03

45

N148 Jasalpur 23°42'39.48"N 72° 7'12.23"E Residential Area 54.1 41.5 52.5 55 45

N149 Samani Society 23°42'40.38"N 72° 6'33.87"E Residential Area 53.1 41.8 51.5 55 45

N150 Ranasan 23°39'45.70"N 72°10'50.37"E Residential Area 53.6 41.9 52 55 45

N151 Balol 23°30'56.80"N 72°14'54.30"E Residential Area 53.9 41.4 52.3 55 45

N152 Kasalpura 23°29'0.81"N 72°17'41.98"E Residential Area 52.8 41.3 51.2 55 45

N153 Santhal 23°29'0.03"N 72°15'19.94"E Commercial Area 53.9 40.5 52.2 65 55

N154 Hevuba 23°33'0.12"N 72°24'29.99"E Residential Area 53.6 41.2 52 55 45

N155 Punasan 23°32'8.89"N 72°24'37.15"E Residential Area 53.7 41.8 52.1 55 45

N156 Mevad 23°31'45.38"N 72°23'20.61"E Residential Area 52.9 41.4 51.3 55 45

N157 Heduva Rajgar 23°33'53.62"N 72°21'5.29"E Residential Area 52.5 41.3 50.9 55 45

N158 Sukhpurda 23°32'36.30"N 72°22'23.06"E Residential Area 53.2 41.6 51.6 55 45

N159 Katpur 23°47'55.12"N 72° 5'38.75"E Residential Area 53.3 41.7 51.7 55 45

N160 Near Katosan 23°27'3.49"N 72°13'4.31"E Residential Area 52.8 41.5 51.2 55 45

N161 Katosan 23°27'40.80"N 72°13'9.05"E Residential Area 54 41.3 52.4 55 45

N162 Tejpura 23°27'57.94"N 72°12'30.09"E Residential Area 53.8 41.1 52.2 55 45

N163 Amarpura 23°25'50.86"N 72°13'23.45"E Residential Area 53.2 41.6 51.6 55 45

N164 Virsoda 23°26'25.98"N 72°11'40.70"E Residential Area 53.4 41.4 51.8 55 45

N165 Moti Rantai 23°24'40.69"N 72°11'48.60"E Residential Area 53.8 41.7 52.2 55 45

N166 Madrisana 23°23'21.55"N 72°12'47.59"E Residential Area 52 41.5 50.4 55 45



Rev. No. 02


Chapter No. 03

46

N167 Sunwala 23°25'14.65"N 72°14'24.10"E Residential Area 52.9 41.1 51.3 55 45

N168 Sujpura 23°26'5.19"N 72°14'46.88"E Residential Area 54 41 52.3 55 45

N169 Jethipura 23°24'5.10"N 72°11'30.87"E Residential Area 51.4 40.8 49.8 55 45

N170 Absana 23°22'55.28"N 72°11'41.44"E Commercial Area 52.2 41.5 50.6 65 55

N171 Rantej 23°28'51.72"N 72° 9'51.52"E Residential Area 52.5 41.2 50.9 55 45

N172 Rampura 23°27'52.98"N 72°10'35.95"E Residential Area 54.2 41.6 52.6 55 45

N173 Ruppura Karanpura 23°29'29.35"N 72°10'50.71"E Residential Area 53.3 40.5 51.7 55 45

N174 Martoli 23°29'30.09"N 72°12'30.83"E Commercial Area 54 40.6 52.3 65 55

N175 Indrap 23°30'5.07"N 72° 8'8.51"E Residential Area 54.1 40.8 52.4 55 45

N176 Akba 23°27'56.05"N 72° 7'25.97"E Residential Area 53.7 41.4 52.1 55 45

N177 Chadasna 23°30'35.69"N 72° 6'43.16"E Commercial Area 51 41.5 49.5 65 55

N178 Dharpura Khant 23°31'26.56"N 72° 6'33.01"E Residential Area 52.8 41.7 51.2 55 45

N179 Chhatasana 23°31'58.82"N 72° 8'19.04"E Residential Area 52.6 42 51 55 45

N180 Dhanpura 23°31'36.62"N 72° 9'27.05"E Residential Area 54.1 41.4 52.5 55 45

N181 Dethli 23°28'27.30"N 72° 6'0.64"E Residential Area 54.5 42 52.9 55 45

N182 Devgadh 23°29'41.01"N 72° 6'11.03"E Residential Area 54.1 40.2 52.4 55 45

N183 Kalri 23°30'58.63"N 72° 4'40.61"E Residential Area 53.5 40.6 51.8 55 45

N184 Dabhasar 23°26'17.86"N 72° 8'53.09"E Residential Area 53.4 40.8 51.8 55 45

N185 Nani Rantai 23°24'38.21"N 72°12'10.97"E Residential Area 53.7 40.5 52 55 45



Rev. No. 02


Chapter No. 03

47

N186 Moti Rantai 23°24'50.62"N 72°11'52.84"E Residential Area 52.2 40.8 50.6 55 45

N187 Dhanpura 23°26'24.32"N 72°15'28.23"E Commercial Area 50.8 42 49.3 65 55

N188 Bhataria 23°26'16.17"N 72°16'30.64"E Residential Area 51.8 41.6 50.2 55 45

N189 Bhonyi 23°22'0.37"N 72°14'21.27"E Residential Area 51.1 41.7 49.6 55 45

N190 Dholasan 23°24'21.39"N 72°20'14.56"E Residential Area 52.3 41.1 50.7 55 45

N191 Aalampur 23°24'1.66"N 72°21'5.65"E Residential Area 53.9 41.9 52.3 55 45

N192 Ganpatpura 23°23'45.74"N 72°19'27.92"E Commercial Area 54.5 41.3 52.8 65 55

N193 Bhatasan 23°23'11.57"N 72°20'51.35"E Commercial Area 54.7 41.1 53 65 55

N194 Visalpur 23°21'11.18"N 72°18'58.39"E Residential Area 53.9 41.2 52.3 55 45

N195 Anondara 23°20'29.93"N 72°18'49.98"E Residential Area 52.8 40.9 51.2 55 45

N196 Aldesan 23°20'4.83"N 72°20'26.20"E Residential Area 53.4 39.6 51.7 55 45

N197 Sarsav 23°20'42.75"N 72°21'15.15"E Commercial Area 51.9 40.6 50.3 65 55

N198 Untva 23°19'32.06"N 72°21'54.12"E Residential Area 53 39.3 51.3 55 45

N199 Kundal 23°18'27.41"N 72°20'55.47"E Residential Area 52.6 39.1 50.9 55 45

N200 Udhyog Nagar 23°18'19.23"N 72°20'11.42"E Residential Area 53.5 39.5 51.8 55 45

N201 Raj City 23°17'38.10"N 72°20'38.23"E Residential Area 53.5 39.7 51.8 55 45

N202 Kadi GIDC 23°17'26.31"N 23°17'26.31"N Commercial Area 53.9 40.1 52.2 65 55

N203 Budasan 23°17'11.76"N 72°22'18.19"E Residential Area 52 41.3 50.4 55 45

N204 Pirojpur 23°16'15.77"N 72°21'7.28"E Residential Area 52.5 41.7 50.9 55 45



Rev. No. 02


Chapter No. 03

48

N205 Manipur 23°18'21.27"N 72°19'24.93"E Residential Area 53.7 41.4 52.1 55 45

N206 Laxmipura 23°18'50.38"N 72°19'3.84"E Commercial Area 54.2 41.7 52.6 65 55

N207 Janta Nagar 23°17'50.80"N 72°19'11.69"E Residential Area 53.6 41.8 52 55 45

N208 Kadi 23°17'52.33"N 72°19'51.61"E Commercial Area 54 40.7 52.3 65 55

N209 Shakar Pura 23°17'56.54"N 72°20'3.94"E Residential Area 53.7 41.8 52.1 55 45

N210 Tin Batti 23°18'5.82"N 72°19'53.31"E Residential Area 53.4 40.7 51.8 55 45

N211 Kasba 23°18'11.78"N 72°19'49.36"E Residential Area 52.8 41.3 51.2 55 45

N212 Adundra 23°20'9.95"N 72°18'37.67"E Residential Area 52.6 41.1 51 55 45

N213 Nagarasan 23°21'1.02"N 72°18'2.76"E Residential Area 52.7 41.2 51.1 55 45

N214 Chalasan 23°24'16.25"N 72°18'10.76"E Commercial Area 54.3 39 52.6 65 55

N215 Dangrva 23°23'10.82"N 72°14'48.30"E Residential Area 52.4 38.7 50.7 55 45

N216 Khara 23°31'41.28"N 72°17'52.08"E Residential Area 53.4 38.5 51.7 55 45

N217 Devinapura 23°33'32.40"N 72°17'26.82"E Residential Area 53.3 38.7 51.6 55 45

N218 Karshanpura 23°34'17.07"N 72°18'34.75"E Residential Area 54.1 39.1 52.4 55 45

N219 Maguna 23°34'42.32"N 72°17'20.72"E Residential Area 53.6 41.5 52 55 45

N220 Laljinagar 23°35'0.67"N 72°17'19.31"E Commercial Area 53.4 41.6 51.8 65 55

N221 Hinglajpura 23°35'20.32"N 72°16'45.77"E Residential Area 52.4 41.6 50.8 55 45

N222 Nugar 23°35'43.83"N 72°19'1.52"E Residential Area 52.3 41.8 50.7 55 45

N223 Gilosan 23°36'3.45"N 72°19'10.17"E Residential Area 51.1 41.9 49.6 55 45



Rev. No. 02


Chapter No. 03

49

N224 Bodli 23°36'34.77"N 72°17'36.19"E Residential Area 51.4 41.8 49.9 55 45

N225 Hardesan 23°37'42.84"N 72°18'13.26"E Residential Area 53.5 40.1 51.8 55 45

N226 Dediyasan Part 23°35'43.50"N 72°20'49.46"E Residential Area 52.8 39.2 51.1 55 45

N227 Panchot 23°37'30.76"N 72°20'12.07"E Commercial Area 53.7 40.1 52 65 55

N228 Bansari Twp 23°37'14.64"N 72°21'12.86"E Residential Area 52.6 38.9 50.9 55 45

N229 Tirupati Shahibaug Township 23°36'54.86"N 72°21'29.88"E Residential Area 53.2 41.1 51.6 55 45

N230 Kunal 23°36'42.00"N 72°21'11.98"E Residential Area 52.4 41 50.8 55 45

N231 Prabhunagar 23°35'27.32"N 72°22'4.24"E Residential Area 54 41.8 52.4 55 45

N232 Moohan Nager 23°35'47.79"N 72°21'59.17"E Residential Area 54.1 41.3 52.5 55 45

N233 Mahesana GIDC 23°35'25.33"N 72°22'20.31"E Commercial Area 52.2 41.2 50.6 65 55

N234 Vidhyanagar 23°34'43.78"N 72°21'50.18"E Residential Area 52.2 41 50.6 55 45

N235 Heduva 23°34'2.87"N 72°22'6.04"E Residential Area 52.9 41 51.3 55 45

N236 RTO 23°34'22.84"N 72°21'55.75"E Commercial Area 53.3 41.1 51.7 65 55

N237 Palwasana Part 23°33'33.61"N 72°22'20.24"E Residential Area 52.9 41.3 51.3 55 45

N238 Boriyavi 23°31'36.81"N 72°21'42.94"E Residential Area 54 40.7 52.3 55 45

N239 Gokalgadh 23°31'49.63"N 72°19'39.95"E Residential Area 54.3 40.4 52.6 55 45

N240 Bhesana 23°29'27.13"N 72°20'27.11"E Residential Area 52.8 40.1 51.2 55 45

N241 Harsundal 23°26'6.19"N 72°20'42.17"E Residential Area 52.2 41.1 50.6 55 45

N242 Tundali 23°25'32.41"N 72°22'50.08"E Residential Area 53.9 41.7 52.3 55 45



Rev. No. 02


Chapter No. 03

50

N243 Dhanali 23°24'32.84"N 72°22'14.25"E Residential Area 51.3 41.6 49.8 55 45

N244 Navi Shedhvi 23°25'4.26"N 72°25'46.79"E Residential Area 53.1 40.8 51.5 55 45

N245 Juni Shedhvi 23°25'1.35"N 72°26'35.52"E Residential Area 53.2 41.8 51.6 55 45

N246 Jamnapur 23°25'14.10"N 72°27'49.72"E Residential Area 52.4 40 50.8 55 45

N247 Laghnaj 23°26'52.05"N 72°29'54.66"E Commercial Area 52.6 39.8 51 65 55

N248 Shankar Pura 23°24'28.87"N 72°30'59.12"E Residential Area 52.7 40 51.1 55 45

N249 Veda 23°24'39.54"N 72°33'1.89"E Residential Area 52.9 39 51.2 55 45

N250 Saldi 23°25'56.08"N 72°31'46.01"E Residential Area 52.3 39.3 50.6 55 45

N251 Khata Amba 23°26'19.50"N 72°32'55.14"E Residential Area 53.1 38.6 51.4 55 45

N252 Parsa 23°26'54.97"N 72°33'19.77"E Residential Area 53.7 40.5 52 55 45

N253 Khata 23°26'9.81"N 72°33'14.07"E Residential Area 52 41.7 50.4 55 45

N254 Himmatpura 23°25'26.06"N 72°33'5.04"E Residential Area 53 41.6 51.4 55 45

N255 Kharna 23°27'10.87"N 72°34'37.51"E Residential Area 53.2 41.3 51.6 55 45

N256 Samau 23°29'2.92"N 72°35'56.90"E Residential Area 53 40.6 51.4 55 45

N257 Solaiya 23°27'9.83"N 72°37'11.33"E Residential Area 52.1 41.4 50.5 55 45

N258 Bapupura 23°27'4.83"N 72°38'27.17"E Residential Area 53.5 41.9 51.9 55 45

N259 Malan 23°25'28.12"N 72°39'30.60"E Residential Area 53.4 41.4 51.8 55 45

N260 Krushna Nagar 23°25'51.92"N 72°39'36.10"E Residential Area 52.8 41 51.2 55 45

N261 Paratpura 23°24'2.00"N 72°37'29.55"E Residential Area 54.6 41.4 52.9 55 45



Rev. No. 02


Chapter No. 03

51

N262 Dholakuwa 23°23'4.21"N 72°38'30.52"E Residential Area 52.2 41.5 50.6 55 45

N263 Fatehpura 23°25'54.47"N 72°38'16.07"E Commercial Area 54.0 41.8 52.4 65 55

N264 Vagosana 23°24'20.19"N 72°35'38.04"E Residential Area 50.7 41 49.2 55 45

N265 Vasai 23°31'51.37"N 72°33'59.72"E Residential Area 53.6 41.1 52 55 45

N266 Manekpur Dabhala 23°34'54.15"N 72°32'12.02"E Residential Area 52.2 40.8 50.6 55 45

N267 Pratappura 23°36'5.67"N 72°34'9.60"E Residential Area 52.5 40.4 50.9 55 45

N268 Dagavadia 23°36'45.06"N 72°35'11.20"E Residential Area 53.2 40.9 51.6 55 45

N269 Dadhiyal 23°37'1.84"N 72°32'1.97"E Residential Area 53.5 41.6 51.9 55 45

N270 Thumthal 23°35'2.24"N 72°29'23.71"E Residential Area 53.9 41.8 52.3 55 45

N271 Anand Pura 23°29'38.02"N 72°31'51.90"E Commercial Area 52.8 41.7 51.2 65 55

N272 Meu 23°30'1.07"N 72°30'51.77"E Residential Area 53.7 41.7 52.1 55 45

N273 Dhandhusan 23°30'47.43"N 72°32'25.03"E Residential Area 54.4 41.9 52.8 55 45

N274 Padhariya 23°31'45.54"N 72°31'32.81"E Residential Area 53.1 38.8 51.4 55 45

N275 Dhamanva 23°32'6.67"N 72°30'24.50"E Residential Area 54.3 38.3 52.6 55 45

N276 Kamlapur 23°33'43.39"N 72°30'42.41"E Residential Area 53.7 39 52 55 45

N277 Dabhla 23°33'32.87"N 72°32'36.34"E Residential Area 53.6 41.1 52 55 45

N278 Linchdi 23°36'21.77"N 72°33'3.08"E Residential Area 53.7 41.9 52.1 55 45

N279 Kada 23°37'54.43"N 72°33'53.38"E Residential Area 54.7 41.1 53 55 45

N280 Kharavada 23°36'14.19"N 72°30'44.96"E Commercial Area 54 41.9 52.4 65 55



Rev. No. 02


Chapter No. 03

52

N281 Magaroda 23°36'32.87"N 72°30'30.67"E Residential Area 53.1 40 51.4 55 45

N282 Chitroda Mota 23°37'20.05"N 72°27'13.10"E Residential Area 51.9 39.2 50.3 55 45

N283 Dela 23°37'25.20"N 72°26'0.16"E Residential Area 52 45.7 50.7 55 45

N284 Gangotri 23°37'16.80"N 72°24'45.33"E Residential Area 54.5 41.6 52.8 55 45

N285 Tavadia 23°37'56.36"N 72°24'40.94"E Residential Area 53.1 41.9 51.5 55 45

N286 Amarpura 23°37'22.35"N 72°24'2.22"E Commercial Area 52.9 40.6 51.3 65 55

N287 Sanket nagar 23°37'2.85"N 72°24'22.74"E Residential Area 53.7 41.6 52.1 55 45

N288 Ravi Kunj 23°36'54.31"N 72°23'54.21"E Residential Area 53.1 41.5 51.5 55 45

N289 Gurukrupa Society 23°36'47.19"N 72°23'30.43"E Residential Area 53.7 41.4 52.1 55 45

N290 Shankar Nagar Society 23°36'32.39"N 72°23'7.96"E Residential Area 53.9 39.5 52.2 55 45

N291 Pilaji Ganj 23°36'16.28"N 72°23'30.41"E Residential Area 53.7 39.3 52 55 45

N292 Virat Nagar Society 23°36'32.10"N 72°23'54.11"E Residential Area 53.1 39.4 51.4 55 45

N293 Sukhpara 23°36'9.67"N 72°22'52.29"E Commercial Area 53.7 41.7 52.1 65 55

N294 Suryoday Nagar 23°36'22.70"N 72°22'34.70"E Residential Area 51.6 40 50 55 45

N295 Kailash Nagar Society 23°36'17.53"N 72°22'16.30"E Residential Area 53.3 41.4 51.7 55 45

N296 Suncity Society 23°36'9.29"N 72°22'15.36"E Residential Area 53.8 41.8 52.2 55 45

N297 ONGC Nagar 23°36'7.61"N 72°22'34.75"E Residential Area 54 41.6 52.4 55 45

N298 NDDB 23°36'39.80"N 72°22'35.34"E Residential Area 53.3 41.8 51.7 55 45

N299 Rajdhani Twp 23°37'4.91"N 72°21'56.07"E Residential Area 52.7 42 51.1 55 45



Rev. No. 02


Chapter No. 03

53

N300 Ramosna 23°37'19.39"N 72°22'47.09"E Residential Area 55.1 41.5 53.4 55 45

N301 Palodar 23°38'26.65"N 72°21'38.80"E Residential Area 51.8 41.8 50.3 55 45

N302 Buttapaldi 23°40'5.11"N 72°21'23.33"E Residential Area 53.9 40.8 52.2 55 45

N303 Nanidau 23°39'49.54"N 72°23'32.87"E Residential Area 51.3 41.8 49.8 55 45

N304 Haripura 23°40'48.75"N 72°22'5.30"E Residential Area 51.2 38.5 49.6 55 45

N305 Rupal 23°41'8.31"N 72°21'6.77"E Residential Area 51.5 40.5 49.9 55 45

N306 Gorad 23°41'18.77"N 72°20'40.34"E Residential Area 52.9 40.2 51.3 55 45

N307 Kharsada 23°42'42.51"N 72°20'46.85"E Residential Area 52 41.4 50.4 55 45

N308 Navapura 23°43'45.89"N 72°20'1.44"E Residential Area 52.8 40.8 51.2 55 45

N309 Kantharavi 23°43'15.35"N 72°18'16.47"E Residential Area 54 41.7 52.4 55 45

N310 Palasar 23°41'54.80"N 72°16'24.51"E Residential Area 51.4 40.9 49.8 55 45

N311 Gorad 23°41'28.81"N 72°18'55.30"E Residential Area 52.5 41.5 50.9 55 45

N312 Virta 23°41'43.04"N 72°18'15.44"E Residential Area 52.2 41.1 50.6 55 45

N313 Pindharpur 23°42'18.89"N 72°14'37.58"E Residential Area 54 41.3 52.4 55 45

N314 Dantakarodi 23°41'55.67"N 72°13'12.88"E Residential Area 52.4 42 50.8 65 55

N315 Mithadharva 23°40'11.32"N 72°13'22.44"E Residential Area 51 41.1 49.5 55 45

N316 Kakasna 23°37'46.88"N 72°14'3.11"E Commercial Area 52 40.1 50.4 65 55

N317 Bhalgamda 23°37'5.50"N 72°12'47.11"E Residential Area 51.1 39.1 49.5 55 45

N318 Saduthla 23°35'54.46"N 72°14'59.25"E Residential Area 52.3 39 50.6 55 45



Rev. No. 02


Chapter No. 03

54

N319 Deloli 23°34'8.89"N 72°15'37.10"E Residential Area 51.9 38.7 50.2 55 45

N320 Sametra 23°33'15.51"N 72°19'23.60"E Commercial Area 54.1 38.8 52.4 65 55

N321 Mareda 23°33'12.65"N 72°19'43.42"E Residential Area 51.5 41.9 50 55 45

N322 Vadosan 23°32'50.77"N 72°21'5.07"E Residential Area 51.6 41.8 50.1 55 45

N323 Modipur 23°28'34.24"N 72°19'6.28"E Residential Area 51.6 41 50 55 45

N324 Suraj 23°23'25.39"N 72°18'40.00"E Residential Area 52.7 39.8 51 55 45

N325 Mokasan 23°22'3.51"N 72°19'25.22"E Residential Area 51.4 40.2 49.8 55 45

N326 Balasar 23°18'2.90"N 72°17'26.10"E Residential Area 53.4 40.7 51.8 55 45

N327 Deusana Gam 23°20'11.56"N 72°17'0.61"E Residential Area 53.6 41.9 52 55 45

N328 Charadu 23°27'13.76"N 72°31'52.75"E Residential Area 54.1 41.9 51.5 55 45

N329 Gozaria 23°28'42.58"N 72°33'46.92"E Commercial Area 54.8 40.3 53.1 65 55

N330 Bhalgam 23°46'42.50"N 72° 2'39.90"E Residential Area 51 41.7 49.5 55 45

N331 Hinglajpura 23°35'26.58"N 72°16'47.15"E Residential Area 53.6 41 52 55 45

N332 Maguna 23°34'46.50"N 72°17'25.42"E Residential Area 53.4 39.8 51.7 55 45

N333 Karshanpura 23°34'20.49"N 72°18'36.99"E Residential Area 54.3 40.3 52.6 55 45

N334 Devinapura 23°33'38.42"N 72°17'30.51"E Residential Area 52.5 39.9 50.9 55 45

N335 Bhatariya 23°26'17.43"N 72°16'33.71"E Residential Area 54.1 41.9 52.5 55 45

N336 Telavi 23°26'22.99"N 72°16'11.39"E Commercial Area 52.4 41.2 50.8 65 55

N337 Dhanpura 23°26'20.58"N 72°15'24.43"E Residential Area 52.3 41.1 50.7 55 45



Rev. No. 02


Chapter No. 03

55

N338 Indrapura 23°22'23.85"N 72°12'22.94"E Residential Area 53.8 41.1 52.2 55 45

N339 Ghelda 23°21'57.28"N 72°13'7.13"E Residential Area 52.2 40.4 50.6 55 45

N340 Bhonyi 23°22'4.42"N 72°14'14.97"E Residential Area 54.5 41.9 51.9 55 45

N341 Nagarsan 23°21'3.59"N 72°18'2.84"E Residential Area 55 41.5 53.3 55 45

N342 Adundra 23°20'11.22"N 72°18'31.84"E Residential Area 54.4 41.2 52.7 55 45

N343 Visalpur 23°21'3.53"N 72°18'49.17"E Commercial Area 53.4 38.7 51.7 65 55

N344 Janta nagar 23°17'51.24"N 72°19'9.32"E Residential Area 54.9 40.8 53.2 55 45

N345 St Ram City 23°17'2.03"N 72°19'48.27"E Residential Area 53.9 41.9 52.3 55 45

N346 Nani Kadi Part 23°16'14.20"N 72°19'30.70"E Residential Area 53.7 40.3 52 55 45

N347 Kundal 23°18'28.61"N 72°20'52.30"E Residential Area 53.4 41.4 51.8 55 45

N348 Dashama 23°16'42.96"N 72°20'34.50"E Residential Area 53.5 40.8 51.9 55 45

N349 Aldesan 23°20'3.82"N 72°20'23.54"E Residential Area 53.2 41.4 51.6 55 45

N350 Lakshmipura 23°21'48.95"N 72°24'13.73"E Residential Area 52 41.8 50.4 55 45

N351 Anandpura ( Nandasan) 23°23'5.81"N 72°26'18.37"E Commercial Area 52.4 42 50.8 65 55

N352 Boru 23°25'7.10"N 72°34'53.39"E Residential Area 52.3 40.3 50.7 55 45

N353 Tiruptati Bunglows 23°25'28.16"N 72°38'48.24"E Residential Area 53.8 41.2 52.2 55 45

N354 Amrutanagar Society 23°25'41.31"N 72°39'54.12"E Residential Area 53 41.5 51.4 55 45

N355 Charada 23°29'19.18"N 72°38'57.59"E Residential Area 52.4 41 50.8 55 45

N356 Himatpura 23°30'54.79"N 72°37'29.93"E Residential Area 53.4 41.4 51.8 55 45



Rev. No. 02


Chapter No. 03

56

N357 Tintodan 23°31'29.48"N 72°36'33.11"E Residential Area 52.8 41.3 51.2 55 45

N358 Anandpura 23°33'21.71"N 72°35'25.35"E Residential Area 52.5 40.2 50.9 55 45

N359 Devda 23°34'35.33"N 72°34'58.89"E Residential Area 52.8 41.2 51.2 55 45

N360 Mahadevpura 23°33'36.28"N 72°34'38.93"E Residential Area 54.4 42 52.9 55 45

* Standard as per Environmental Protection Act 1986, the principle rules published for Ambient Noise Level Standard (Area Category: Residential /Industrial/ Commercial Area)

3.8.3 Observations

Day time Noise Levels

Noise levels during day time were found to be in the average range of 47.9 to 55.7 dB (A). The maximum noise level was observed as 55.7 dB (A) at

Palwasana Part (N69) and a minimum of 47.9 dB (A) was observed at Near Mahakali Dham Akba ( N1).

Night time Noise Levels

Noise levels observed to fall in the range 38.3 to 45.7 dB (A) during the night time. A maximum of 45.7 dB (A) was observed at Dela (N283) and a

minimum of 38.3 dB (A) was observed at Dhamanva (N275).

In residential zone the noise levels were found to meet the Ambient Air Quality Standards in respect of Noise (henceforth Noise Standards 2000) as given in Noise

Rules 2000, during day and night time. Within the proposed location, the noise levels were within the OSHA damage risk criteria for hearing. The area which is

located at a lower elevation and has dense vegetation, which would prevent noise propagation to nearby villages. Many of the activities such as construction,

bus/auto station and traffic causing noise are temporary in nature,



Rev. No. 02


Chapter No. 03

57

RANTEJ KAKASANA

MEHSANA NEAR JOTANA

NEAR BADALPURA NEAR GOGAMAHARAJ TEMPLE

Fig 3.18: Noise Sampling Locations of the study area



Rev. No. 02


Chapter No. 03

58

3.9. Water Quality Monitoring

Selected water quality parameters of the Ground water resources within the project area have been studied

for assessing the water environment. Water samples were examined for Physico-chemical, Heavy metals

and Bacteriological parameters in order to assess the effect of industrial, vehicular and other activities on

ground or surface water.

3.9.1. Sampling and Analysis Techniques

Samples for chemical analysis were collected in polyethylene carboys. Samples collected for metal content

were acidified with 1 ml HNO3. Samples for bacteriological analysis were collected in sterilized bottles. The

samples were analyzed as per the procedures specified in IS methods and 'Standard Methods for the

Examination of Water and Wastewater' published by American Public Health Association (APHA).

3.9.2 Details of Water Sampling Locations

Twenty (20) Ground Water and Forty (40) Surface water samples were collected to establish baseline

water quality of the study area. The Ground water sampling locations are listed in the Table-3.10 Surface

water samples are listed in the Table 3.11

TABLE 3.10– Ground Water Sampling Locations

Location

Code

Name of the

Location

Coordinates Direction & Distance w.r.t Center of

block Latitude Longitude

GW1 Ajol 23°29'4.59"N 72°41'17.43"E E-5.1 km w.r.t Charada

GW2 Fatepura 23°25'56.08"N 72°38'12.90"E SE-6.4 km w.r.t Mansa

GW3 Jitoda 23°43'51.98"N 72° 8'20.66"E WNW-4.5 km w.r.t Lanwa Ext-1

GW4 Kungar 23°47'48.10"N 72°3'54.70"E NE-1.9 km w.r.t Patan

GW5 Bhadrada 23°49'23.37"N 71°59'37.74"E WNW-7.8 km w.r.t Patan

GW6 Sunsar 23°38'49.61"N 72°13'38.02"E NNE-1.9 km w.r.t Balol Ext I

GW7 Ubkhal 23°34'9.15"N 72°37'37.00"E ENE-8 km w.r.t Dedana

GW8 Bilodra 23°31'32.76"N 72°39'20.74"E NNE-4.1 km w.r.t Charada

GW9 Chadasana 23°33'9.03"N 72°40'34.02"E NNE-7.7 km w.r.t Charada



Rev. No. 02


Chapter No. 03

59

GW10 Dilwara 23°30'32.35"N 72°40'56.62"E ENE-4.8 km w.r.t Charada

GW11 Suraj 23°23'41.02"N 72°18'49.36"E SE-7.5 km w.r.t North Kadi Ext New

GW12 Kherva 23°32'36.80"N 72°26'30.28"E SW-2.8 km w.r.t East Sobhasan

GW13 Rupal 23°41'3.68"N 72°20'35.16"E NNW-3.2 km w.r.t North Sobhasan Ext I

GW14 Lagnaj 23°26'50.30"N 72°29'50.45"E NNW-2.3 km w.r.t Langhnaj-Wadasama

GW15 Linch 23°29'43.82"N 72°22'17.93"E NNE-1.8 km w.r.t Geratpura

GW16 Tejpura 23°28'3.44"N 72°12'22.40"E WNW-6 km w.r.t North Kadi Ext (New)

GW17 Nani Rantej 23°24'37.52"N 72°12'5.00"E WSW-6.8 km w.r.t North Kadi Ext (New)

GW18 Chandrumana 23°45'6.83"N 72° 0'52.53"E SW-5.3 km w.r.t Patan

GW19 Bechrpura 23°37'54.96"N 72°29'5.41"E ENE-5.8 km w.r.t North Sobhasan Ext-II

GW20 Indrap 23°30'46.06"N 72° 8'28.99"E N-1.4 km w.r.t Becharaji

TABLE 3.11 – Surface Water Sampling Locations

Location Code

Location Coordinates Direction & Distance w.r.t Center of

Blocks Latitude Longitude

SW1 Bilodra 23°31'23.00"N 72°39'13.00"E NNE-3.7 Km w.r.t Charada

SW2 Lodra 23°27'21.46"N 72°43'12.14"E ESE -9.9 Km w.r.t Mansa

SW3 Ridrol 23°27'25.93"N 72°40'48.15"E ESE -9.1 Km w.r.t Mansa

SW4 Palasar 23°41'56.24"N 72°16'25.82"E ENE-3.9 Km w.r.t Lanwa

SW5 Dilwara 23°30'38.71"N 72°40'45.26"E ENE-4.7 Km w.r.t Charada

SW6 Ajol 23°29'3.56"N 72°41'22.29"E E -5.1 Km w.r.t Charada

SW7 Kherva 23°32'47.80"N 72°26'25.50"E SW-2.5 Km w.r.t East Sobhasan

SW8 Langhnaj 23°26'41.94"N 72°29'53.46"E NNW-2.3 Km w.r.t Langhnaj-Wadasama

SW9 Rupal 23°41'5.12"N 72 20'34.41"E NNW-4 Km w.r.t North Sobhasan Ext I

SW10 Chadasana 23°33'7.44"N 72°40'33.15"E NNE-8 Km w.r.t Charada

SW11 Linch 23°29'34.72"N 72°22'26.79"E NNE-1.9 Km w.r.t Warosan

SW12 Golapur 23°50'0.91"N 72° 6'56.72"E NE-8.5 Km w.r.t Patan



Rev. No. 02


Chapter No. 03

60

SW13 Modhera 23°35'8.95"N 72° 8'9.51"E NNE-8.9 Km w.r.t Becharaji

SW14 Indrap 23°30'43.63"N 72° 8'30.44"E N-1.5 Km w.r.t Becharaji

SW15 Ubkal 23°34'11.49"N 72°37'34.25"E NE-8.1 Km w.r.t Mansa

SW16 Nani Rantej 23°24'42.28"N 72°12'9.36"E WSW-6.4Km w.r.t North Kadi Ext (New)

SW17 Tejpura 23°27'57.37"N 72°12'31.89"E SE-5.7 Km w.r.t North Kadi Ext (New)

SW18 Becharpura 23°37'53.11"N 72°29'6.31"E ENE- 6 Km w.r.t North Sobhasan Ext-II

SW19 Shapawada 23°33'20.14"N 72° 0'3.38"E WNE -14.2 Km w.r.t Becharaji

SW20 Kungar 23°48'5.24"N 72° 3'52.34"E NNE-2.6 Km w.r.t Patan

SW21 Kadi 23°16'6.83"N 72°19'23.57"E S-9.4 Km w.r.t Kadi

SW22 Khorsam 23°39'37.02"N 72° 3'57.24"E N-12.9 Km w.r.t Patan

SW23 Chandrumana 23°44'43.57"N 72° 0'40.36"E SW-6.2 Km w.r.t Patan

SW24 Bhadrada 23°49'14.69"N 71°59'42.38"E NW-7.4 Km w.r.t Patan

SW25 Tejpura (Narmatha canal)

23°28'17.93"N 72°12'2.81"E WNW-7 Km w.r.t North Kadi Ext (New)

SW26 Rupal (Narmatha canal)

23°41'15.69"N 72°20'30.91"E NNW-4.3 Km w.r.t North Sobhasan Ext I

SW27 Indrap (Narmatha canal)

23°30'45.44"N 72°10'20.63"E ENE-3.1 Km w.r.t Becharaji

SW28 Delwad (Saparmathi river)

23°23'12.24"N 72°43'19.44"E SE -15.7 Km w.r.t Mansa

SW29 Khakat (Saparmathi river)

23°30'11.25"N 72°47'35.64"E ENE-15.7 Km w.r.t Charada

SW30 Ucharpi (kalri river) 23°36'37.75"N 72°25'43.38"E

NW-0.7 Km w.r.t North Sobhasan

Ext-II

SW31 Vikas nagar (Kalri river)

23°34'34.35"N 72°22'5.36"E NE-2.6 Km w.r.t Mehasana city

SW32 Meshana Near NH19(Kalri river)

23°34'23.75"N 72°21'2.86"E NNE-4.9 Km w.r.t Jotana South

SW33 Nani Rantej (Narmatha canal)

23°24'11.07"N 72°13'15.43"E WNW- 4.5 Km w.r.t Warosan

SW34 Khorsam (Narmatha canal)

23°39'24.42"N 72° 3'48.85"E SSW-13.5 Km w.r.t Patan

SW35 Ranuj(Narmatha canal)

23°45'10.35"N 72°12'55.38"E NE-4.8 Km w.r.t Lanwa Ext-1

SW36 Akhaj 23°30'42.93"N 72°27'13.45"E SE-2.2 Km w.r.t Sanganpur

SW37 Udhalpur 23°33'31.20"N 72°29'12.21"E E-3 Km w.r.t East Sobhasan

SW38 Balol 23°31'13.01"N 72°15'6.09"E WNW-2.1 Km w.r.t Santhal



Rev. No. 02


Chapter No. 03

61

SW39 Motidau 23°40'59.42"N 72°24'8.25"E ENE-5.3 Km w.r.t North Sobhasan Ext I

SW40 Mansa 23°25'48.28"N 72°39'22.77"E SE-7.9 Km w.r.t Mansa

The study area map covering the Ground and Surface Water Monitoring station is depicted in Figure – 3.18 (a)

and 3.18(b).

Figure – 3.19 (a) Map Showing Ground Water monitoring Stations

Ground Water Monitoring Stations



Rev. No. 02


Chapter No. 03

62

Figure – 3.19 (b) Map Showing Surface Water monitoring Stations

Surface Water Monitoring Stations

3.9.3 Presentation of Results

The sampling results for the ground water and surface water samples were tabulated in Table –3.12 (a)

to (d) & Table 3.13 (a) to (h) respectively. The analysed results were compared with the Acceptable

Drinking water standard as per IS: 10500:2012 for Ground water and Surface water samples



Rev. No. 02


Chapter No. 03

63

AJOL JITODA

BILODRA CHADASANA

UBKHAL INDRAP

Fig 3.20: Ground Water Sampling Locations



Rev. No. 02


Chapter No. 03

64

PALASAR AJOL

LANGHNAJ RUPAL

LINCH INDRAP

Fig 3.21: Surface water Sampling Locations



Rev. No. 02


Chapter No. 03

65

TABLE – 3.12(a): GROUND WATER ANALYSIS RESULTS

S.No Parameters Unit Procedure GW1 GW2 GW3 GW4 GW5

Acceptable

Limit as per IS

10500:2012

1 Colour Hazen APHA 22nd Edition (Reaff:2012) 1 Nil 2 1 Nil 5

2 Temperature °C APHA 22nd Edition (Reaff:2012) 25.6 26.2 25.4 26 25.6 Not Specified

3 pH at 25°C - IS : 3025 Part 11- 1983 (Reaff:2012) 7.83 7.80 7.94 7.73 7.47 6.5-8.5

4 Electrical Conductivity μS/cm IS : 3025 Part 14- 1984 (Reaff: 2012) 1480 863 1470 2600 380 Not Specified

5 Turbidity NTU IS : 3025 Part 10-1984 (Reaff: 2012) BDL(< 0.5) 0.5 1.6 0.8 0.7 1

6 Total Dissolved Solids mg/l IS : 3025 Part 16-1984 (Reaff: 2012) 843 480 820 1455 217 500

7 Total Hardness as CaCO3 mg/l IS : 3025 Part 21-2009 (Reaff: 2014) 270 264 300 620 140 200

8 Total Alkalinity as CaCO3 mg/l IS : 3025 Part 23- 1986 (Reaff:2012) 256 260 240 290 124 200

9 Chloride as Cl mg/l IS : 3025 Part 32-1988 (Reaff: 2014) 350 105 365 635 55 250

10 Sulphate as SO4 mg/l APHA 22nd Edition -4500- SO42- E 10 14 14 98 6 200

11 Fluoride as F mg/l APHA 22nd Edition-4500-F B&D 0.58 0.58 1.22 0.79 0.10 1

12 Nitrate as NO3 mg/l APHA 22nd Edition -4500- NO3- B 8 31 11 35 2 45

13 Ammonical Nitrogen mg/l APHA 22nd Edition -4500- NH3 B&C 0.13 0.34 0.34 BDL(< 0.05) BDL(< 0.05) Not Specified

14 Total Nitrogen as N mg/l APHA 22nd Edition -4500- N&C,NO3 E 2.95 7.36 3.25 8.22 1.12 Not Specified

15 Total Phosphorous mg/l IS : 3025 Part 31-1988 (Reaff:2014) 0.44 0.21 0.16 0.01 0.09 Not Specified

16 Sodium as Na mg/l IS : 3025 Part 45-1993 (Reaff:2014) 215 75 191 306 32 Not Specified



Rev. No. 02


Chapter No. 03

66

17 Potassium as K mg/l IS : 3025 Part 45-1993 (Reaff:2014) 7 3 3 12 3 Not Specified

18 Calcium as Ca mg/l IS : 3025 Part 40-1991 (Reaff:2014) 65 53 58 112 26 75

19 Magnesium as Mg mg/l APHA 22nd Edition-3500 Mg-B 26 32 37 83 18 30

20 Iron as Fe mg/l IS : 3025 Part 53-2003 0.057 BDL(< 0.05) 0.223 0.14 BDL(< 0.05) 1

21 Manganese as Mn mg/l APHA 22nd EDN -3500-Mn D BDL(< 0.02) BDL(< 0.02) BDL(< 0.02) BDL(< 0.02) 0.06 0.10

22 Dissolved Oxygen as O2 mg/l IS:3025:Part-38:1989 (Reaff:2003) 4.1 3.9 3.7 4.3 4.4 Not Specified

23 Chemical Oxygen

Demand mg/l IS:3025:Part-58:2006 (Reaff:2012) 4.8 BDL (< 4) 6.8 BDL (< 4) BDL (< 4) Not Specified

24 Bio-Chemical Oxygen

Demand @ 27°C for 3 days mg/l IS:3025:Part-44:1993 (Reaff:2014) < 2 < 2 < 2 < 2 < 2 Not Specified

25 Copper as Cu mg/l APHA 22nd Edition -3111 B 0.03 BDL(< 0.03) BDL(< 0.03) BDL(< 0.03) BDL(< 0.03) 0.05

26 Mercury as Hg mg/l APHA 22nd Edition -3112 B BDL(<

0.001)

BDL(<

0.001) BDL(< 0.001)

BDL(<

0.001)

BDL(<

0.001) 0.001

27 Cadmium as Cd mg/l APHA 22nd Edition -3111 B BDL(<

0.003)

BDL(<

0.003) BDL(< 0.003)

BDL(<

0.003)

BDL(<

0.003) 0.003

28 Total Arsenic as As mg/l APHA 22nd Edition -3114 B BDL(< 0.01) BDL(< 0.01) BDL(< 0.01) BDL(< 0.01) BDL(< 0.01) 0.01

29 Cyanide as CN mg/l APHA 22nd Edition -4500 CN BDL(< 0.05) BDL(< 0.05) BDL(< 0.05) BDL(< 0.05) BDL(< 0.05) 0.05

30 Lead as Pb mg/l APHA 22nd Edition -3111 B BDL(< 0.01) BDL(< 0.01) BDL(< 0.01) BDL(< 0.01) BDL(< 0.01) 0.01

31 Zinc as Zn mg/l APHA 22nd Edition -3111 B 0.114 0.019 0.137 0.12 0.05 5

32 Hexavalent Chromium as

Cr6+ mg/l APHA 22nd Edition -3500 Cr B BDL(< 0.01) BDL(< 0.01) BDL(< 0.01) BDL(< 0.01) BDL(< 0.01) Not Specified



Rev. No. 02


Chapter No. 03

67

33 Total Chromium as Cr mg/l APHA 22nd Edition -3111 B BDL(< 0.02) BDL(< 0.02) BDL(< 0.02) BDL(< 0.02) BDL(< 0.02) 0.05

34 Nickel as Ni mg/l APHA 22nd Edition -3111 B BDL(< 0.02) BDL(< 0.02) BDL(< 0.02) BDL(< 0.02) BDL(< 0.02) 0.02

35 Sodium Absorption Ratio _ Calculation 5.69 2.01 4.82 5.34 1.18 Not Specified

36 Salinity %0 APHA 22nd Edition -2520 B 0.9 0.5 0.8 1.5 0.2 Not Specified

37 Calcium Hardness as

CaCO3 mg/l IS:3025:Part-40:(Reaff:2014) 162 132 144 280 64 Not Specified

38 Magnesium Hardness as

CaCO3 mg/l APHA 22nd Edition -3500 Mg B 107 132 156 340 76 Not Specified

39 Molybdenum as Mo mg/l APHA 22nd Edition -3111 D BDL(< 0.05) BDL(< 0.05) BDL(< 0.05) BDL(< 0.05) BDL(< 0.05) 0.07

40 Total Coliform MPN/

100ml IS :1622 (1981) 14 6 33 <2 <2 Absent

41 Faecal coliform MPN/

100ml IS:1622 (1981) <2 <2 <2 <2 <2 Absent

42 Total Suspended Solids mg/l IS:3025 Part 17 <1 <1 1 <1 <1 Not Specified

BDL- Below Detection Limit

TABLE – 3.12(b): GROUND WATER ANALYSIS RESULTS


Acceptable

Limit as per IS

10500:2012

1 Colour Hazen APHA 22nd Edition (Reaff:2012) 2 2 1 2 Nil 5



Rev. No. 02


Chapter No. 03

68

2 Temperature °C APHA 22nd Edition (Reaff:2012) 25.8 26.1 25.5 26.1 26.3 Not Specified



5 Turbidity NTU IS : 3025 Part 10-1984 (Reaff: 2012) 1.2 BDL(< 0.5) BDL(< 0.5) 1 0.6 1







12 Nitrate as NO3 mg/l APHA 22nd Edition -4500- NO3- B 7.4 12 BDL(< 1) 1 1 45

13 Ammonical Nitrogen mg/l APHA 22nd Edition -4500- NH3 B&C 0.18 0.13 BDL(< 0.05) 0.36 0.08 Not Specified

14 Total Nitrogen as N mg/l APHA 22nd Edition -4500- N&C,NO3 E 2.08 2.96 1 0.81 0.58 Not Specified



17 Potassium as K mg/l IS : 3025 Part 45-1993 (Reaff:2014) 10 7.4 8 7 9 Not Specified



20 Iron as Fe mg/l IS : 3025 Part 53-2003 0.3 0.05 0.148 0.183 0.05 1



Rev. No. 02


Chapter No. 03

69

21 Manganese as Mn mg/l APHA 22nd EDN -3500-Mn D BDL(< 0.02) BDL(< 0.02) BDL(< 0.02) BDL(< 0.02) BDL(< 0.02) 0.10

22 Dissolved Oxygen as O2 mg/l IS:3025:Part-38:1989 (Reaff:2003) 4.1 3.8 4 3.6 3.7 Not Specified

23 Chemical Oxygen

Demand mg/l IS:3025:Part-58:2006 (Reaff:2012) BDL (< 4) BDL (< 4) 6.6 BDL (< 4) 8.2 Not Specified

24

Bio-Chemical Oxygen

Demand @ 27°C for 3

days

mg/l IS:3025:Part-44:1993 (Reaff:2014) < 2 < 2 < 2 < 2 < 2 Not Specified

25 Copper as Cu mg/l APHA 22nd Edition -3111 B BDL(< 0.03) BDL(< 0.03) BDL(< 0.03) BDL(< 0.03) BDL(< 0.03) 0.05


0.001)

BDL(<

0.001)

BDL(<

0.001)

BDL(<0.001

)

BDL(<

0.001) 0.001


0.003)

BDL(<

0.003)

BDL(<

0.003)

BDL(<0.003

)

BDL(<

0.003) 0.003












Rev. No. 02


Chapter No. 03

70

36 Salinity %0 APHA 22nd Edition -2520 B 1.5 0.7 0.8 1 1 Not Specified







100ml IS :1622 (1981) < 2 6 21 17 40 Absent


100ml IS:1622 (1981) < 2 < 2 < 2 < 2 < 2 Absent

42 Total Suspended Solids mg/l IS:3025 Part 17 <1 <1 <1 <1 <1 Not Specified


TABLE – 3.12(c): GROUND WATER ANALYSIS RESULTS


Acceptable

Limit as per IS

10500:2012

1 Colour Hazen APHA 22nd Edition (Reaff:2012) Nil 1 1 2 Nil 5






Rev. No. 02


Chapter No. 03

71

5 Turbidity NTU IS : 3025 Part 10-1984 (Reaff: 2012) BDL(< 0.5) 0.8 1.3 1.5 BDL(< 0.5) 1







12 Nitrate as NO3 mg/l APHA 22nd Edition -4500- NO3- B 1.5 23 28 17 41 45

13 Ammonical Nitrogen mg/l APHA 22nd Edition -4500- NH3 B&C BDL(< 0.05) 0.34 0.43 0.41 0.12 Not Specified

14 Total Nitrogen as N mg/l APHA 22nd Edition -4500- N&C,NO3 E 1 6.65 6.22 3.74 9.74 Not Specified






20 Iron as Fe mg/l IS : 3025 Part 53-2003 BDL(< 0.05) 0.165 0.195 0.216 BDL(< 0.05) 1





Rev. No. 02


Chapter No. 03

72

23 Chemical Oxygen

Demand mg/l IS:3025:Part-58:2006 (Reaff:2012) BDL ( < 4) 4.4 BDL ( < 4) BDL ( < 4) 6.4 Not Specified



25 Copper as Cu mg/l APHA 22nd Edition -3111 B BDL(< 0.03) BDL(< 0.03) BDL(< 0.03) BDL(< 0.03) BDL(< 0.03) 0.05


0.001) BDL(< 0.001) BDL(< 0.001) BDL(< 0.001) BDL(< 0.001) 0.001


0.003) BDL(< 0.003) BDL(< 0.003) BDL(< 0.003) BDL(< 0.003) 0.003















Rev. No. 02


Chapter No. 03

73





100ml IS :1622 (1981) < 2 26 < 2 4 23 Absent


100ml IS:1622 (1981) < 2 < 2 < 2 < 2 < 2 Absent

42 Total Suspended Solids mg/l IS:3025 Part 17 <1 <1 <1 <1 <1 Not Specified


TABLE – 3.12(d): GROUND WATER ANALYSIS RESULTS


Acceptable

Limit as per IS

10500:2012

1 Colour Hazen APHA 22nd Edition (Reaff:2012) Nil 2 2 1 Nil 5




5 Turbidity NTU IS : 3025 Part 10-1984 (Reaff: 2012) BDL(< 0.5) 1.9 1.1 1 BDL(< 0.5) 1






Rev. No. 02


Chapter No. 03

74





13 Ammonical Nitrogen mg/l APHA 22nd Edition -4500- NH3 B&C BDL(< 0.05) 0.25 0.83 0.37 BDL(< 0.05) Not Specified







20 Iron as Fe mg/l IS : 3025 Part 53-2003 BDL(< 0.05) 0.248 0.152 0.184 BDL(< 0.05) 1



23 Chemical Oxygen

Demand mg/l IS:3025:Part-58:2006 (Reaff:2012) 4.8 BDL (< 4) 6.4 4 BDL (< 4) Not Specified



25 Copper as Cu mg/l APHA 22nd Edition -3111 B BDL(< 0.03) BDL(< 0.03) BDL(< 0.03) BDL(< 0.03) BDL(<

0.03) 0.05



Rev. No. 02


Chapter No. 03

75

26 Mercury as Hg mg/l APHA 22nd Edition -3112 B BDL(< 0.001) BDL(<

0.001) BDL(< 0.001) BDL(< 0.001) BDL(< 0.001) 0.001

27 Cadmium as Cd mg/l APHA 22nd Edition -3111 B BDL(< 0.003) BDL(<

0.003) BDL(< 0.003) BDL(< 0.003) BDL(< 0.003) 0.003






Cr6+ mg/l APHA 22nd Edition -3500 Cr B BDL(< 0.01) BDL(< 0.01) BDL(< 0.01) BDL(<0.01) BDL(< 0.01) Not Specified









39 Molybdenum as Mo mg/l APHA 22nd Edition -3111 D BDL(< 0.05) BDL(<

0.05)

BDL(<

0.05) BDL(< 0.05) BDL(< 0.05) 0.07


100ml IS :1622 (1981) 33 < 2 21 14 7 Absent



Rev. No. 02


Chapter No. 03

76


100ml IS:1622 (1981) < 2 < 2 < 2 < 2 < 2 Absent

42 Total Suspended Solids mg/l IS:3025 Part 17 <1 1 1 <1 <1 Not Specified


TABLE – 3.13(a): SURFACE WATER ANALYSIS RESULTS

S.No Parameters Unit Procedure SW1 SW2 SW3 SW4 SW5

Acceptable

Limit as per IS

10500:2012

1 Colour Hazen APHA 22nd Edition (Reaff:2012) 8 10 55 30 15 5

2 Temperature °C APHA 22nd Edition (Reaff:2012) 26.1 26 25.3 25.4 25.9 Not Specified



5 Turbidity NTU IS : 3025 Part 10-1984 (Reaff: 2012) 4.1 6.6 14.1 8 7.2 1










Rev. No. 02


Chapter No. 03

77

13 Ammonical Nitrogen mg/l APHA 22nd Edition -4500- NH3 B&C 0.66 2.63 0.53 0.58 2.11 Not Specified




17 Potassium as K mg/l IS : 3025 Part 45-1993 (Reaff:2014) 5.6 13 20 27 130 Not Specified



20 Iron as Fe mg/l IS : 3025 Part 53-2003 1.3 1.96 5.46 2.63 2.89 1

21 Manganese as Mn mg/l APHA 22nd EDN -3500-Mn D 0.04 BDL(< 0.02) 0.07 BDL(< 0.02) 0.11 0.10

22 Dissolved Oxygen as O2 mg/l IS:3025:Part-38:1989 (Reaff:2003) 6.3 4.8 4.8 5 4.5 Not Specified

23 Chemical Oxygen

Demand mg/l IS:3025:Part-58:2006 (Reaff:2012) 14 28 40 33 42 Not Specified

24

Bio-Chemical Oxygen

Demand @ 27°C for 3

days

mg/l IS:3025:Part-44:1993 (Reaff:2014) 2.1 4.9 6.2 5.8 8.7 Not Specified

25 Copper as Cu mg/l APHA 22nd Edition -3111 B BDL(< 0.03) BDL(<

0.03) BDL(< 0.03) BDL(< 0.03) 0.15 0.05

26 Mercury as Hg mg/l APHA 22nd Edition -3112 B BDL(< 0.001) BDL(< 0.001) BDL(< 0.001) BDL(< 0.001) BDL(<

0.001) 0.001

27 Cadmium as Cd mg/l APHA 22nd Edition -3111 B BDL(< 0.003) BDL(< 0.003) BDL(< 0.003) BDL(< 0.003) BDL(<

0.003) 0.003



Rev. No. 02


Chapter No. 03

78

28 Total Arsenic as As mg/l APHA 22nd Edition -3114 B BDL(< 0.01) BDL(<

0.01) BDL(< 0.01) BDL(< 0.01)

BDL(<

0.01) 0.01

29 Cyanide as CN mg/l APHA 22nd Edition -4500 CN BDL(< 0.05) BDL(<

0.05) BDL(< 0.05) BDL(< 0.05)

BDL(<

0.05) 0.05

30 Lead as Pb mg/l APHA 22nd Edition -3111 B BDL(< 0.01) 0.013 BDL(<0.01) BDL(<0.01) BDL(<

0.01) 0.01



Cr6+ mg/l APHA 22nd Edition -3500 Cr B BDL(< 0.01)

BDL(<

0.01) BDL(< 0.01) BDL(< 0.01)

BDL(<

0.01) Not Specified

33 Total Chromium as Cr mg/l APHA 22nd Edition -3111 B BDL(< 0.02) BDL(<

0.02) BDL(< 0.02) BDL(< 0.02)

BDL(<

0.02) 0.05

34 Nickel as Ni mg/l APHA 22nd Edition -3111 B BDL(< 0.02) BDL(<

0.02) BDL(< 0.02) BDL(< 0.02)

BDL(<

0.02) 0.02


36 Salinity %0 APHA 22nd Edition -2520 B 0.3 0.4 0.9 0.5 1 Not Specified





39 Molybdenum as Mo mg/l APHA 22nd Edition -3111 D BDL(< 0.05) BDL(<

0.05) BDL(< 0.05) BDL(< 0.05) BDL(<

0.05) 0.07


100ml IS :1622 (1981) 50 170 17 220 500 Absent



Rev. No. 02


Chapter No. 03

79


100ml IS:1622 (1981) 7 33 4 26 26 Absent


TABLE – 3.13(b): SURFACE WATER ANALYSIS RESULTS

S.No Parameters Unit Procedure SW6 SW7 SW8 SW9 SW10

Acceptable

Limit as per IS

10500:2012

1 Colour Hazen APHA 22nd Edition (Reaff:2012) 25 15 3 8 4 5




5 Turbidity NTU IS : 3025 Part 10-1984 (Reaff: 2012) 9.5 12.8 2.2 7 1.7 1







Documents

Draft Environment Impact Assessment Report For Onshore ... · Draft Environment Impact Assessment Report For Onshore Development and Production of Oil & Gas from 406 wells in 40 ML