GEOPHYSICAL SURVEYS FOR PROPOSED MARINE OUTFALL PIPELINE ROUTE OFF KESANAPALLI, EAST COAST OF INDIA FOR MEGHA ENGINEERING & INFRASTRUCTURES LTD

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1 GEOPHYSICAL SURVEYS FOR MEGHA ENGINEERING & INFRASTRUCTURES LTD FINAL REPORT ON (GEOPHYSICAL SURVEYS) GSIPL DOCUMENT No. GSIPL_JO27_2013_Finrep (Rev.0) 0 16/10/2013 Final Report SVS PS PPK REV ISSUE DATE DESCRIPTION PREPARED CHECKED APPROVED CLIENT S APPROVAL

2 Project Information Project : Client : PRE-ENGINEERING GEOPHYSICAL SURVEYS MEGHA ENGINEERING & INFRASTRUCTURES LTD Client Reference No. : WO.NO MEIL/ETP/RJY/HYD/WO/004 Dated 25/06/2013 GSIPL Project No. : GSIPL_JO27_2013 GSIPL Document No. : GSIPL_JO27_13_FINREP ( Rev. 0) Issued To: Megha Engineering & Infrastructures Ltd. For the Attention of : Mr. P.Doraiah, Director Address : Megha Engineering & Infrastructures Ltd S-2, TECHNOCRAT INDUSTRIAL ESTATE Balanagar Hyderabad , India Tel : Fax : Issued By: Geostar Surveys India Pvt.Ltd. Project Manager : Address : Mr. Prem Singh Geostar Surveys India Pvt. Ltd. Geostar Sadan, Plot No. 46, Sector-19C, Vashi Tel : Fax : Mob: mail@geostar-surveys.com Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 2 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

3 LIST OF CONTENTS Page No 1 SUMMARY OF RESULTS INTRODUCTION GENERAL SCOPE OF WORK DELIVERABLES REFERENCES RESOURCES OF WORK PERSONNEL EQUIPMENT VESSEL METHODOLOGY GENERAL GEODESY HORIZONTAL CONTROL HYPACK NAVIGATION SOFTWARE VERTICAL CONTROL SINGLE BEAM ECHO SOUNDER SIDE SCAN SONAR SYSTEM SUB-BOTTOM PROFILER SHALLOW SOIL SAMPLING PRE-PLOTS / RUN-IN PLOTS PROCESSING OF DATA PROGRESS REPORT EVENT MARKS IN FIELD CALIBRATIONS DGPS VERIFICATION SINGLEBEAM ECHOSOUNDER CALIBRATION SIDE SCAN SONAR CALIBRATION SURVEY EXECUTION MOBILISATION INSPECTION ACTIVITIES SAFETY DATA QUALITY CONTROL REPORTING PROGRESS REPORT FINAL REPORT DETAILED RESULTS GENERAL HORIZONTAL CONTROL VERTICAL CONTROL BATHYMETRY SEABED FEATURES Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 3 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

4 8.6 SHALLOW STRATIGRAPHY MAGNETOMETER SURVEY SHALLOW SOIL SAMPLING LIST OF FIGURES FIGURE 1 LOCATION MAP... 5 FIGURE 2 SURVEY VESSEL MFB NUKAMATHA FIGURE 3 MKII ODOM ECHTRACK SINGLE BEAM ECHOSOUNDER FIGURE 4 EDGETECH SIDE SCAN SONAR TOW FISH FIGURE 5 GEOACOUSTICS GEOPULSE SUB-BOTTOM PROFILER FIGURE 6 GRAVITY CORER FIGURE 7 TORVANE & POCKET PENETROMETER FIGURE 8 SINGLE BEAM ECHOSOUNDER CALIBRATION BY BAR CHECK METHOD FIGURE 9 SIDE SCAN SONAR CALIBRATION BY RUB TEST METHOD LIST OF TABLES TABLE 1 LIST OF PERSONNEL TABLE 2 GEODETIC PARAMETERS AND CONVERSIONS LIST OF APPENDICES APPENDIX-A : VESSEL OFFSET DIAGRAM APPENDIX-B : DGPS SYSTEM CALIBRATION APPENDIX-C : SOIL SAMPLE ANALYSIS C1 : ON-BOARD ANALYSIS C2 : LABORATORY ANALYSIS APPENDIX-D : TIDAL READING AND GRAPHS APPENDIX-E : EXTRACTS FROM FIELD RECORDS LIST OF DRAWINGS DRAWING NUMBER DESCRIPTION SCALE J027_13/ MEIL/ HYDROAIR/KESANAPALLI/ BSFI/2013/01/1465 J027_13/ MEIL/HYDROAIR/KESANAPALLI/ SGP/2013/01/1465A BATHYMETRY, SEABED FEATURES & ISOPACH SEABED & INTERPRETED GEOLOGICAL PROFILES Total Number of Drawings 02 No. Charts Rev. 1: H 1:2500 V: 1: Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 4 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

5 Figure 1 Location Map Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 5 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

6 1 SUMMARY OF RESULTS KP s are calculated from LFP (KP 0.0) to Tentative DP (KP 1.5). In view of very shallow water depth / surf zone / breakers in the near shore area within the proposed 400 metres survey corridor, the survey was carried out as close as possible to the shore upto KP 0.3. The survey corridor is also extended for 150 metres beyond the Tentative Diffuser Point (KP 1.5). Bathymetry All Water depths are shown in the relevant charts are in meters and decimeters. Predicted tide of Sacromento shoal was used for reducing raw water depth to Chart Datum. The overall water depth at KP 1.5 is about 8.0 metres as seen in echograms in Appendix-E (6.7 metres after reducing to chart datum) and overall water depth at KP 0.30 (shallowest portion surveyed along the proposed pipeline route) is 1.90 metres towards shore (0.60 metres after reducing to chart datum). Within the 400 metres survey corridor between KP 0.30 and KP 1.5 (Tentative DP), the general bathymetry presents a smooth seabed with a regional gradient towards south. Conoiurs drawn at 1.0 metre interval shows a general treand in the EW direction. No bathymetric anomalies were recorded at any point within the surveyed area which could be hazardous to lay the outfall pipeline. Seabed Features In general, Side scan sonar reveals a seabed of varying reflectivity to 100 KHz frequencies, which can be broadly categorized as follows: Type 1: Low reflective unconsolidated sediments interpreted as Silty Clays. Type 2: Homogeneous Low to Medium Reflective Sediments (Interperted As Clayey Sands). While Type 1 sediments are recorded within the survey corridor between KP 0.60 and KP 0.90, Type 2 sediments were recorded in rest of the survey corridor between KP 0.90 and KP 1.5 (Tentative DP). No features of signiface/items of debris, existing pipelines or cables were recorded within the survey corridor which could be construed as hazardous to the pipelaying activities. Shallow Staratigraphy The shallow sedimentary sequence within the surveyed area represents shallow marine fluvio-deltaic sedimentary environment. The stratigraphic sequences within the survey area indicate primarily clays admixed with sands & silts at different densities. The shallow geological successions within the surveyed area can be differentiated into essentially two major units viz. Unit A & B. The individual units are described below: Unit A is the uppermost unit identified within the surveyed corridor occurring all along the survey area. This unit is identified with parallel bedded sediments. Intermittant discontinuous reflection configuration within this surfiicial unit sediments indicate presence of sands & silts admixed with clays at different densities. Base of this layer is continuous all along the survey areas and interbedded nature of the sediments provided good reflecting surfaces for acoustic signals. Low to medium acoustic impedance to the seismic energy indicates that this unit is comprised parallel bedded unconsolidated clayey sands. Base of this surficial unit gently undulates across the survey area with thickness varying between 5.3 and 7.6 metres subseabed. Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 6 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

7 This unit occurs directly below the unit A sediments within the survey corridor. In the absence of any boreholes information at this type of sediments, it is interpreted that this type of sediments comprise of Stiff Clays with admixture of sand. Apart from the above, no other features were recorded within the survey corridor which could be hazardous to the proposed pipeline construction activities. Magnetometer Survey Marine Seaspy magnetometer data was processed by using SeaLink magnetometer data logging software and Surfur 9.0 to find out magnetic anomalies within the surveyed corridor. Recorded data do not indicate any existing pipelines/cables or any magnetic objects with in the survey coridor. Shallow Soil Sampling Samples are collected at 3 different locations. Drop core sample DC1 collecetd at the Tentattive DP (KP 1.5) recovers silty clay with fine sand. Grab samples collected at KP (GS1) and KP (GS2) also recover silty clay with fine sand. Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 7 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

8 2 INTRODUCTION 2.1 GENERAL Megha Engineering & Infrastructures Ltd (MEIL) proposed to carry out Pre-engineering surveys (geophysical surveys) along the proposed marine outfall route. MEIL entrusted M/s Hydroair Tectonics (SPD) Pvt.Ltd with the job of carrying out the said surveys for a length of 1.65 km into the sea from the LFP within a corridor of 400 Metres width to identify the nature of sea floor for laying HDPE pipeline, off Kesanapalli, Andhra Pradesh State, East Coast of India. In this regards Geostar Surveys India Pvt Ltd (GSIPL) has been awarded these works as a cooperation of services to Hydroair Tectonics (SPD) Pvt.Ltd. GSIPL provided the vessel, equipment and personnel for the provision of Geophysical Surveys to Hydroair Tectonics (SPD) Pvt.Ltd. The survey area lies Offshore Kesanapalli, Amalapuram District, East Coast of India. These survey services comprise of the provision of suitable personnel and equipment in order to obtain, interpret and report on bathymetric data, seabed morphology, debris, depressions, manmade & natural seabed obstructions and also to report on Identification of any structural deformations such as folds, slumps, faults or fracture zones and any other potential within the surveyed corridor for the proposed pipelines route. DGPS positioning system, Single beam Echo sounder, Side scan sonar, Sub-bottom profiler and Magnetometer were to be deployed for carrying out geophysical surveys for proposed pipeline pipeline route. Gravity corer/grab sampler were to be deployed for the collection of soil samples. Predicted tide of Sacremento shoal was used for reducing the raw water depth to chart datum. The surveys were carried out between 17/09/2013 to 20/09/2013 from the boat MFB-Nukamatha-1. This final report J027_13_Finalrep (Rev.0) deals with Geophysical surveys for proposed pipeline route, offshore Kesanapalli, East Coast of India for Hydroair Tectonics (SPD) Pvt.Ltd. 2.2 SCOPE OF WORK Description of The Survey To carryout Geophysical surveys for a length of 1.65 km into sea from LFP line within a corridor of 400 mtr width to identify the nature of sea floor. 9 longitudinal survey lines to be run at 50 metres interval (-200m,-150m, -100m, -50m, 0m, 50m, 100m, 150m,200m) with 0 metes line approximately following the proposed pipeline route and cross lines to be run at 50 metres interval. Surveys to be carried out by deploying DGPS, Dual Frequency Echo Sounder, Side scan sonar, sub-bottom profiler on all longitudinal survey lines. Magnetometer to be run on center line along the proposed pipeline route. Echos sounder and sub bottom profiler were to be deployed on all the cross lines. Soil samples were to collected at every 500m interval along the proposed pipeline route and meeting the client s scope of work are anticipated within the survey corridors. All samples to be extruded in the field and carefully examined and visually classified onboard the vessel and properly sealed and carefully packed for transportation to onshore laboratory for testing. Predicted tide of Sacromento shoal (the nearest tidal port) was used for converting raw water depths to chart datum. Surveys to be carried out as close as possible to the shore taking advantage of high tide. Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 8 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

9 2.3 DELIVERABLES Preparation of survey reports, drawings, documents and submission of the same to Hydroair Tectonics (SPD) Pvt Ltd for review and approval. Six [06] sets of the final analyzed survey report to be submitted within four [04] weeks from the completion of survey work. Geostar carried out all works in strict compliance with applicable documents enclosed with the tender document and as per the instructions of Hydroair Tectonics (SPD) Pvt Ltd representative. The scope of work also included any other item/work required to complete the work in all respects as per specifications, drawings and instructions of Hydroair Tectonics (SPD) Pvt Ltd representative. Final report and drawings covered the following: 2.4 REFERENCES Description of survey methods, procedure, equipment and instrument calibration data. Bathymetric chart, scale of 1:2500. Identification of shallow subsea bed gas pockets, bed rock etc. Identification of any subsea obstructions and/or seafloor instability. Shallow soil sample field & laboratory test results. Identification of sub bottom sediment layer. Presence of any metallic objects and/or debris on the sea floor Photographic copies of raw survey recordings identifying features of interest such as pipelines, crossings, anchors, metallic objects, subsea obstructions etc. and bathymetric and sub bottom discontinuities from the echo sounder, sub bottom profiler and side scan sonar. References are made in accordance with the Scope of work and the project information as outlined in the Geostar Surveys India Pvt. Ltd survey procedure and Hydroair Tectonics (SPD) Pvt Ltd contract. Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 9 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

10 3 RESOURCES OF WORK 3.1 PERSONNEL PERSONNEL FUNCTION FUNCTION On-shore Mr. Prem Singh Project Manager Off-shore Mr. S. Venkata Subbarao Party Chief/ Geophysicist ----do---- Mr. Kajal Bhowal Sr. Hydrographic Surveyor ----do---- Mr. Sandeep Kumar Survey Engineer ----do---- Mr. Saurabh Kumar Survey Engineer ----do---- Mr Venkatersh Survey Engineer Table 1 List of Personnel 3.2 EQUIPMENT a) Positioning & Navigation 1 x Leica MX 420 DGPS Positioining System (Primary) 1 x Computer with HyPack Navigation and Data logging Software 1 x KVH 1000 Series digital Fluxgate Gyro / Electronic Compass 2 x Computer systems + monitors (one spare) 1 x SG Brown S1000 Gyro 1 x Fix Box b) Single Beam Echo sounder System 1 x Echo Track DF3200 MKII Dual Frequency Echosounder 1 x Dual frequency transducer 24 Khz khz + mounting bracket & base plate 1 x Bar Check 1 x Computer Interface, 12V Power Supply & Generator 1 x Seatex MRU-5 Heave Compensator c) Side Scan Sonar System (Edgetech 4100P) 1 x 272TD dual channel(100/500 KHz) Towfish c/w spares kits 1 x Edgetech 4100P Digital side scans sonar system 2 x Tow cable (200 m length) 1 x Edgetech integrated acousition and Processing System d) Shallow Seismic profiler 1 x Geoacoustics Sub Bottom Profiler 1 x Geoacoustics Transducer, Mounting Bracket etc. 1 x CODA DA2000 Digital Recording system d) Magnetometer 1 x Proton Precession Marine Seaspy magnetometer 1 x Tow fish with cable 1 x Recording Unit Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 10 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

11 g) Soil sampling 1 x Gravity Corer & Grab Sampler 1 x Pocket penetrometer 1 x Torvane All associated consumable and spares for effective operation of above 3.3 VESSEL MFB Nukamatha-1 with high manoeuverability and sufficient deck space was used for carrying out the Geophysical surveys. Refer Appendix-C for Vessel offset diagram. Figure 2 Survey Vessel MFB Nukamatha-1 Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 11 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

12 FINAL REPORT METHODOLOGY GENERAL The survey works were conducted in accordance with the specifications and scope of work supplied by the Client, and the standard survey procedures of M/s. Geostar Surveys India Pvt. Ltd. 4.2 GEODESY The Surveys were conducted in WGS 84 spheroid, Indian Datum, Grid co-ordinates are in terms of Universal Transverse Mercator (UTM) Projection. Details of Spheroid and Grid systems are as follows: GEODETIC PARAMETERS Datum Spheroid Semi-Major Axis (a) Semi-Minor Axis (b) First Eccentricity Squared (e^2) Inverse Flattening (1/f) WGS 84 WGS metres metres PROJECTION PARAMETERS Grid Projection Central Meridian (CM) Origin Latitude (False Lat.) Hemisphere False Easting (FE) False Northing (FN) Scale Factor on CM Units Table Universal Transverse Mercator 81.0 East (Zone 44) 00.0 North m 0.0 m Metres Geodetic Parameters and Conversions HORIZONTAL CONTROL Position for the vessel during the survey was provided by Leica MX420 combined beacon receiver system. Differential correction signals were received on-board during survey operations continuously from the nearest DGPS beacon reference station (DGLL Station) set up at Antravedi. These are maintained by Director General of Light Houses and Light Ship, Govt of India. An integrated GPS/Beacon receiver with built-in antenna provided GPS differential corrections in NMEA-0183 format for navigation with high degree of accuracy. Leica 420 DGPS is a combined high performance GPS receiver and a differential beacon receiver in an extremely compact and fully waterproof enclosure providing high accuracy by utilizing the broadcasted KHZ frequency differential GPS corrections from IALA (International Autthority of Lighthouses Association) beacons. The positioning data received have high reliability and integrity. The system was calibrated at a known location in Geostar s office prior to mobilisation. 4.4 HYPACK NAVIGATION SOFTWARE HyPack is a world's leading software solution provider for navigation, hydrographic survey, data acquisition and processing needs. Doc. No. GSIPL_J027_13_FINREP (Rev. 0) Dt. 16/10/ Geostar Surveys India Pvt. Ltd

13 This was interfaced to all the data acquisition systems on board and the data logged was processed by using HyPack data processing software. Extreme Versatility- Survey Applications Its modular design and inherent flexibility makes Hypack perfect for a wide variety of applications. For example, it can be configured to perform: Hydrographic and Oceanographic Surveys Offshore Bathymetry & Sub bottom Profiler and Pipe-laying Dredging, Marine construction including Offshore Oil and Gas ROV and AUV Tracking and Data Collection Chart and ENC Production Survey Configuration Created at the planning stage with the setup program, a Template Database contains all survey configuration parameters pertinent to the project. Real Time Final Result- Data Collection and Output Raw Sensor Data Data Storage Accurate Timing and Ring Buffers Real time DTM Production Advanced Gridding methods XYZ Data Side Scan Sonar Snippets Eventing Advanced Dredging Functionality 4.5 VERTICAL CONTROL Predicted tide of Sacromento shoal was used for reducing raw water depth to Chart Datum. 4.6 SINGLE BEAM ECHO SOUNDER ODOM DF3200 MKII Dual frequency Echo sounder integrated with a DGPS positioning system was used during the entire survey to record geographically referenced bathymetric data for measuring water depths. Sea swell was eliminated by using Heave compensator. Digitized data was confirmed by the inspection of analogue records. Pre-mobilisation Checks : The echo sounder systems was bench checked prior to mobilisation. The outboard transducer pole was marked, from the base of the transducer shoe, at 0.1metre intervals (these marks were used to confirm transducer draft once the arrangement are deployed). The Bar Check was checked to confirm the marks at regular one meter intervals and that the marks are readily identifiable. The Echosounder was interfaced to the Navigation and Data Logging computer to confirm that the digitization of depths are operational. Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 13 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

14 Figure 3 MKII ODOM Echtrack Single Beam Echosounder Installation and Calibration : The Echosounder system was installed and operated in accordance with the manufacturers instructions. Portable transducers was installed rigidly to a bracket at suitable location on the survey vessel. The transducer shoe was sufficiently deep not to experience turbulence and aeration when the vessel steams at survey speed. The depth of the transducer below water line was ascertained by reference to present marks on the pole. Prior to commencing survey works, the Echosounder was calibrated against a bar check. The procedure is to confirm the following constants: Tx = To establish index error (combined effect of transducer depth and delays in the recorder) Vp = To confirm velocity of propagation of sound in saline water. With the vessel stationary in the water, the Bar was lowered to at least 2m below the transducer and the nearest mark on the chain set at the water line. Once the transmission mark was set the apparent depth of the transducer was noted on the analogue record and recorded in the deck log for future reference. Care was be taken not to subsequently, inadvertently moves the transmission line. Echosounder Settings Frequency : 24 KHz & 200 KHz. Range on record : Auto Vertical Paper scale : 1:100 / 1:300 Range scale : 0-30 metres. Data reduction and presentation The system wias operated following recommended manufacturer procedures. The vertical paper scale was set at 1:100 and the appropriate phase wias selected to display the seabed (and the heave compensator trace) at all times. Transducer offset was logged and applied during subsequent processing. Event marks corresponding to position fixes were generated automatically from the on-line navigation computer interface, and passed to the analogue recorder at a regular interval. Prior to the processing, the data files were backed up. The essential hydrographic data thus obtained is corrected. The bathymetry is charted in decimal notation to the nearest one decimal place. Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 14 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

15 The offsets of the echo sounder transducer from a central reference point (GPS Antenna) on the survey vessel was recorded for the following: Layback : 3.10 m Transverse offset : 0.00 m Starboard Transducer depth : 0.90 m 4.7 SIDE SCAN SONAR SYSTEM Edgetech 4100P Digital Side scan sonar with dual channel `Tow fish' was provided to investigate the sea floor for morphological and other features which may interfere with installation of operations. The Tow fish carries two 100 KHz and 500 KHz transducers mounted on either side. The acoustic beam emitted from each transducer has a horizontal beam angle of 1 degree and a vertical beam of 40 degrees tilted at 10 degrees below the horizontal. This configuration enables reflected signals to be recorded from contacts as far as 500 meters abeam, subject to the range selected. Figure 4 Edgetech Side Scan Sonar Tow Fish The system is capable of depicting the sonar images corrected for distortions due to tow fish height and vessel speed and at a scale, which clearly displays the resolution of the system. The width of the sea floor sonar image for each recording channel not to be less than 10 centimeters. Image correcting systems incorporate a continuous profile display of tow fish height as part of the display format. The sonar data processing unit was interfaced to the survey computer to accept the following: - Fix mark and identifiers generated synchronously with the logging of position data. Smoothed vessel speed data Sufficient tow cable length was provided to permit towing of the sonar fish at a maximum height above seabed of 10% of the range selected, in all parts of the survey area. The available cable length normally be expected to exceed three times the maximum expected water depth in the survey area. All tow cables were measured and marked at regular intervals for lay back determination. The side scan sonar sensor design towing characteristics, cable and vessel tow point selected to ensure the towed fish is adequately decoupled from any vessel pitching and rolling motion. All sonar data and associated fix mark and fix number information were stored, permanently, on an electronic medium. The survey lines were run with a range setting of 100 meters either side at a scanning frequency of 100 Khz along the survey lines. The tow system to be operated following recommended manufacturers procedures. The records obtained by means of this equipment suitable to form a complete morphological map of areas investigated. The Tow fish was towed astern of the survey vessel at a depth providing Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 15 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

16 optimum seabed return. Layback and cable-out was logged from each survey line. Total layback was applied during subsequent interpretation; accuracy was verified by reciprocal passes of existing seabed installation. Event marks, corresponding to position fixes, were regularly generated automatically by the navigation computer and were passed on to the Side scan sonar system. Digital data was clearly annotated and cross checked. The Side scan sonar digital data was reviewed to register any contacts during the survey. The layback of the towed fish was verified from reciprocal SSS lines over a well defined contact with a constant layback. The offsets of the Side scan sonar tow fish from Central Reference Point (GPS Antenna) on the survey vessel was recorded for the following: Layback : m+ Cable out astern of the vessel Transverse offset : m Transducer depth : Variable 4.8 SUB-BOTTOM PROFILER To delineate surficial layers clearly and for recording high resolution data, surveys were carried out by deploying Geoacoustics Geopulse sub-botom profiler. The transducer was side-mounted on a pole which was be fixed on the out-board of the survey vessel. The energy, adjustable between 1 and 10 KW at a frequency output of between 3.5 to 14 K Hz, was released from transducer and the returning seismic energy was received and passed through internal amplifiers and filters system built inside the receiver. The power output `Time Variable Gain' Amplifier and Filter settings were field selected to give optimum resolution and necessary seabed penetration for the prevailing geological conditions. The data from both the systems above will be recorded digitally by CODA DA 2000 Digital recording system. The output data was stored in the root directory of CODA and the same was copied on multiple disks. Figure 5 Geoacoustics Geopulse Sub-bottom profiler The system was operated following recommended manufacturers procedures. Event marks, corresponding to position fixes at regular intervals, were generated automatically by the navigation computer and were passed to the digital data recording system CODA DA The output data was stored in the root directory of CODA and the same was copied on multiple disks. Processing Sub-Bottom Profiles The velocity of propagation of acoustic waves sub seabed was assumed to be 1600 m/sec., consistent with Silty sands, for time-depth conversion. Compilation paper plots were produced and depths to different reflectors below seabed against track plot fixes were plotted. The offsets of the sub-bottom Profiler from a central reference point (GPS Antenna) on the survey vessel was recorded for the following: Layback : 0.00 m Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 16 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

17 Transverse offset : 0.00 Starboard Transducer depth : 0.90 m 4.9 SHALLOW SOIL SAMPLING As standard equipment, a gravity drop core assembly comprising the Benthos-type Gravity Core Assembly was mobilisewd for collecting shallow soil samples. The assembly is complete with sufficient weights, core barrels, core liners, core catcher, and cutter head sufficient to perform required number of cores at any time. Gravity cores were attempted at 500 metres intervals along the proposed pipeline rotes as described in the SOW. However, where the samples could not recoivered from gravity corer, grab sampler we deployed to collect the soil samples. A set of mini torvane and pocket penetrometer were available on-board the vessel for simple in-situ soil tests and assessments. All samples were extruded in the field and carefully examined and visually classified onboard the vessel. Representative samples were properly sealed and carefully packed for transportation to onshore laboratory for testing. Samples transported to onshore laboratory were tested to determine the following properties to supplement the information obtained in the field which together shall be used to determine soil parameters for pipeline design and installation. Un-drained shear strength for cohesive soil Internal friction angle for cohesionless soil Dry unit soil density Submerged unit soil density Grain Size Distribution Carbonate contents Specific Gravity Atterberg limits Liquefaction potential of soils Organic contents Chlorides and sulphates Electrical resistivity All shallow seismic survey results were correlated with soil data. Segment by segment profiles and its geotechnical characteristics were developed. Figure 6 GRAVITY CORER Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 17 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

18 Mini torvane and pocket penetrometer were used for in-situ soil tests and assessments. Figure 7 TORVANE & POCKET PENETROMETER 4.10 PRE-PLOTS / RUN-IN PLOTS Survey lines were planned as discussed in the scope of work and pre plots for the area were prepared prior to commencement of survey. The pre-plots were run on the computer while doing the survey lines. Any deviation from the prefixed lines was flashed on the display along with necessary course corrections to be made to adhere to the prefixed line. This enabled the Navigator to guide the vessel to the prefixed survey line all the times PROCESSING OF DATA The survey data logged in HyPack survey file format was processed in HyPack software and finally presented in drawing form using AutoCAD Rel.14 for windows PROGRESS REPORT While on location, survey Party Chief submitted daily progress report to Client s representative and also conveyed the same to Geostar office in Mumbai EVENT MARKS The on-line computer system was interfaced for closure to the analogue traces on the survey vessel. Event marks corresponding to position fixes were generated automatically from the on-line navigation computer interface and passed to the analogue recorders at regular intervals across the ground. Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 18 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

19 5 IN FIELD CALIBRATIONS The following calibrations / activities were conducted in field and prior to and during survey operations. Draft Check for single beam echo sounder Rub Test for the Side Scan Sonar 5.1 DGPS VERIFICATION DGPS Verification were carried out at Geostar office building at Vashi, prior to mobilisation of systems in the field. 5.2 SINGLEBEAM ECHOSOUNDER CALIBRATION Pre-mobilisation Checks: The echo sounder systems was bench checked prior to mobilisation. The outboard transducer pole was marked, from the base of the transducer shoe, at 0.1 meter intervals (these marks will then be used to confirm transducer draft once the arrangement are deployed). The Bar Check carried out to confirm the marks at regular one meter intervals and that the marks are readily identifiable. Figure 8 Single Beam Echosounder Calibration by Bar Check method The Echo sounder was interfaced to the Navigation and Data Logging computer to confirm that the digitization of depths are operational. Installation and Calibration: The Echo sounder system was installed and operated in accordance with the manufacturers instructions. Portable transducer was installed rigidly to a bracket at suitable location on the survey vessel. The transducer shoe was sufficiently deep not to experience turbulence and aeration when the vessel steams at survey speed. The depth of the transducer below water line was ascertained by reference to present marks on the pole. Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 19 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

20 Prior to commencing survey works, the Echo sounder was calibrated against a bar check. The procedure is to confirm the following constants: Tx = To establish index error (combined effect of transducer depth and delays in the recorder) Vp = To confirm velocity of propagation of sound in saline water. With the vessel stationary in the water, the Bar was lowered to at least 2 m below the transducer and the nearest mark on the chain set at the water line. Once the transmission mark was set the apparent depth of the transducer was noted on the analogue record and recorded in the deck log for future reference. Care was taken not to subsequently, inadvertently moves the transmission line. The Bar was then lowered at regular intervals to the maximum practical depth. The bar was allowed to settle at each depth. On recording the maximum obtainable depth the Bar was similarly stepped back to the surface. The digitized depth was also be checked during the Bar calibration 5.3 SIDE SCAN SONAR CALIBRATION Prior to acceptance of SSS equipment, and at any other time requested by the Company Representative, the system was thoroughly tested. Verification tests include, but not be limited to: - a) In water testing of the sonar tow fish and cable connectors. b) Cross-talk evaluation by rub test. c) Transducer output functionality tests. d) Transducer sensitivity by reflection testing in air. e) Interfacing verifications. Wherever possible the performance of the side scan sonar system, in the area of operations, as part of mobilisation acceptance trials, were verified using known seabed installations or features as test targets. Side scan sonar lay-back position calculation was verified with box-in survey of known seabed features prior to start of survey operation. Figure 9 Side Scan Sonar Calibration by Rub Test method Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 20 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

21 6 SURVEY EXECUTION The following sections describe Geostar Surveys India Pvt Ltd approach to this project from award to the issue of Final Report 6.1 MOBILISATION The Project Manager liaise with operations staff, the vessel master and Party Chief to make the appropriate arrangements to mobilise the vessel. The port of mobilisation and demobilisation for all the phases of this project was Etimuga, Kakinada and comprise only the boarding of client representatives with survey personnel. All instrumentation was subject to in port tests which was carried out as follows: - Satisfactory installation of the DGPS system and computation routines. - Checking of Echo Sounder Draft Settings (Index Error), via draft check method. - SSS sonar check [Rub Test] Upon satisfactory completion of in harbour testing, the selected vessel proceeded to the initial work area. Upon arrival on site, survey sensors were deployed and acceptance tests were performed as required, in order to complete mobilisation. 6.2 INSPECTION ACTIVITIES Following completion of all offshore equipment calibration inspection activities were commenced and preceded in accordance with the project schedule. 6.3 SAFETY Safety was observed on the vessel while carrying out the Surveys according to Geostar s HSE plan submitted along with the survey procedures. 6.4 DATA QUALITY CONTROL Geostar Surveys India Pvt. Ltd. has fully documented Quality Assurance and Health, Safety and Environmental System procedures. The experienced operators from Geostar Surveys constantly monitored the data quality as the survey progresses. A log of profiles was maintained and quality of data was noted. Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 21 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

22 7 REPORTING 7.1 PROGRESS REPORT While on offshore surveys, GSIPL conveyed the daily progress report about project to Hydroair Tectonics (SPD) Pvt Ltd representatives. 7.2 FINAL REPORT Six [06] sets of Final Report to be submitted within four [04] weeks from the completion of field survey. The final report text and final drawings containing the following information: Description of survey methods, procedure, equipment and instrument calibration data. Bathymetric chart, scale of 1:2,500. Identification of shallow subsea bed features Identification of any subsea obstructions and/or seafloor instability. Shallow soil sample field & laboratory test results. Identification of sub bottom sediment layer. Presence of any metallic objects and/or debris on the sea floor Photographic copies of raw survey recordings identifying features of interest and bathymetric and sub bottom discontinuities from the echo sounder, sub bottom profiler and side scan sonar. Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 22 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

23 8 DETAILED RESULTS 8.1 GENERAL Megha Engineering & Infrastructures Ltd (MEIL) proposed to carry out Pre-engineering surveys (geophysical surveys) along the proposed marine outfall route. MEIL entrusted M/s Hydroair Tectonics (SPD) Pvt.Ltd with the job of carrying out the said surveys for a length of 1.65 km into the sea from the LFP within a corridor of 400mt width to identify the nature of sea floor for laying HDPE pipeline off Kesanapalli, Andhra Pradesh State, East Coast of India. In this regards Geostar Surveys India Pvt Ltd (GSIPL), has been awarded these works as a cooperation of services to Hydroair Tectonics (SPD) Pvt.Ltd. GSIPL provided the vessel, equipment and personnel for the provision of Geophysical Surveys to Hydroair Tectonics (SPD) Pvt.Ltd. The survey area lies Offshore Kesanapalli, East Coast of India. KP s are calculated from LFP (KP0.0) to Tentative DP (KP 1.5). 8.2 HORIZONTAL CONTROL Position for the vessel during the survey was provided by Leica MX420 combined beacon receiver system. Differential correction signals were received on-board during survey operations continuously from the nearest DGPS beacon reference station (DGLL Station) set up at Antravedi. Leica 420 DGPS is a combined high performance GPS receiver and a differential beacon receiver in an extremely compact and fully waterproof enclosure providing high accuracy by utilizing the broadcasted KHZ frequency differential GPS corrections from IALA (International Autthority of Lighthouses Association) beacons. The positioning system was verified at know location at Geostar surveys office building prior to mobilisation in the field (Refer Appendix-B for DGPS verification result). 8.3 VERTICAL CONTROL Predicted tide of Sacromento shoal was used for reducing raw water depth to Chart Datum. 8.4 BATHYMETRY The following text should be read in conjunction with a) J027_13/ MEIL/ HYDROAIR/KESANAPALLI/ BSFI/2013/01/1465 b) Annotated data examples placed at Appendix-E All Water depths are shown in the relevant charts are in meters and decimeters. Within the 400 metres survey corridor between KP 0.30 and KP 1.5 (Tentative DP), general bathymetry within survey corridor presents a smooth seabed with a regional gradient towards south. The overall water depth at KP 1.5 is about 8.0 metres as seen in echograms in Appendix-E (6.7 metres after reducing to chart datum) and overall water depth at KP 0.30 (shallowest portion surveyed along the proposed pipeline route) is 1.90 metres towards shore (0.60 metres after reducing to chart datum). Within the 400 metres survey corridor between KP 0.30 and KP 1.5 (Tentative DP), the general bathymetry presents a smooth seabed with a regional gradient towards south. Conoiurs drawn at 1.0 metre interval shows a general treand in the EW direction.

24 Conoiurs drawn at 1 metres interval shows a general treand in the EW direction. Average gradient of the seabed between 3 and 4 metres contours is 1 in 135 and between 4 and 5 metres is 1 in 180. Between 5 and 6 metres depth contours, average gradient of the seabed is 1 in 400. No bathymetric anomalies were recorded at any point within the surveyed area which could be hazardous to lay the outfall pipeline. 8.5 SEABED FEATURES The following text should be read in conjunction with a) J027_13/ MEIL/ HYDROAIR/KESANAPALLI/ BSFI/2013/01/1465 b) Annotated data examples placed at Appendix E. The definition of seabed features within the surveyed areas was primarily achieved through the examination of side scan sonar data acquired. Hence, qualitative analysis of the sediments is based on the reflectivity of the surficial sediments to 100 khz sonar frequency. The tolerance limit for the Side Scan Sonar result is ± 5 meters. Additionally, appropriate reference to the echo sounder, sub bottom profiler data sets and shaloow soil samples was carried out as required. In general, Side scan sonar reveals a seabed of varying reflectivity to 100 KHz frequencies, which can be broadly categorized as follows: Type 1: Low reflective unconsolidated sediments interpreted as Silty Clays. Type 2: Homogeneous Low to Medium Reflective Sediments (Interperted As Clayey Sands). While Type 1 sediments are recorded within the survey corridor between KP 0.60 and KP 0.90, Type 2 sediments were recorded in rest of the survey corridor between KP 0.90 and KP 1.5 (Tentative DP). Shallow soil sample recoveries also confirm the interpreted soil types within the survey corridor. No features of signiface/items of debris, existing pipelines or cables were recorded within the survey corridor which could be construed as hazardous to the pipelaying activities. 8.6 SHALLOW STRATIGRAPHY The following text should be read in conjunction with a) J027_13/ MEIL/HYDROAIR/KESANAPALLI/ SGP/2013/01/1465A b) Annotated data examples placed at Appendix-E For the purpose of data interpretation an assumed sound velocity of acoustic propagation of 1600m/sec has been adopted for the conversions of two way travel time to depth. In the absence of any borehole information, all sedimentary properties defined below are based on assessment of the recorded acoustic characteristics of the material along with interpreted sedimentary structures. Additionally, appropriate reference to the echo sounder, side scan data sets and gravity core/grab samples collected at places within the survey corridor was carried out as necessary. Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 24 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

25 The shallow sedimentary sequence within the surveyed area represents shallow marine fluvio-deltaic sedimentary environment. The stratigraphic sequences within the survey area indicate primarily clays admixed with sands & silts at different densities. Geological profiles has been given for centerline approximately following the proposed pipeline and two wing lines eitherside of the centerline. The shallow geological successions within the surveyed area can be differentiated into essentially two major units viz. Unit A & B. The individual units are described below: UNIT A Unit A is the uppermost unit identified within the surveyed corridor occurring all along the survey area. This unit is identified with parallel bedded sediments. Intermittant discontinuous reflection configuration within this surfiicial unit sediments indicate presence of sands & silts admixed with clays at different densities. Base of this layer is continuous all along the survey areas and interbedded nature of the sediments provided good reflecting surfaces for acoustic signals. Low to medium acoustic impedance to the seismic energy indicates that this unit is comprised parallel bedded unconsolidated clayey sands Base of this surficial unit gently undulates across the survey area with thickness varying between 5.3 and 7.6 metres subseabed. UNIT B This unit occurs directly below the unit A sediments within the survey corridor. The unit appears on records with medium acoustic impedance to the seismic energies thus inhabiting the further penetration of the acoustic signals. In the absence of any boreholes information at this type of sediments, it is interpreted that this type of sediments comprise of Stiff Clays with admixture of sand. Apart from the above, no other features were recorded within the survey corridor which could be hazardous to the proposed pipeline construction activities. 8.7 MAGNETOMETER SURVEY Marine Seaspy magnetometer data was processed by using SeaLink magnetometer data logging software and Surfur 9.0 to find out magnetic anomalies within the surveyed corridor. Recorded data do not indicate any existing pipelines/cables or any magnetic objects with in the survey coridor. 8.8 SHALLOW SOIL SAMPLING Collection of sediment samples were attempted by drop corer at all the 3 proposed locations. Where drop corer failed to ratrieve or retain the samples, grab sampler was deployed to collect the samples. Drop corer works on the principle of gravity mechanism (Free fall). A dead weight enables the corer to free fall with adequate force. A PVC pipe was inserted within the corer to collect soil sample. A sample catcher is placed at the end of the corer which trap the soil sample. Samples are collected at 3 different locations and top and the bottom of the soil samples were identified and shear strength measured using Torevane, an instrument to measure shear strength of the sample. Drop core sample DC1 collecetd at the Tentattive DP (KP 1.5) recovers silty clay with fine sand. Grab samples collected at KP (GS1) and KP (GS2) also recover silty clay with fine sand. Samples detailed on-board analysis and laboratory analysis are placed Appendix C1 and Laboratory Analysis at Appendix C2. Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 25 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

26 APPENDIX A VESSEL OFFSET DIAGRAM Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 26 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

27 VESSEL OFFSET DIAGRAM JOB NO : J027_2013 Described by : GEOSTAR SURVEYS CLIENT : HYDROAIR TECTONICS (SPD) PVT. LTD Date : 23/09/2013 Job Title : GEOPHYSICAL SURVEYS Remarks : GEOPHYSICAL SURVEYS LOCATION : VESSEL : MFB NUKAMATHA-I 7.73m 14.4m 2.35m 2.35m E/S 3.1m 4.7m SBP & DGPS 3.57m MAGGY TOW POINT SSS TOW POINT VARIABLE VARIABLE LEGEND E/S TRANSDUCER SUB-BOTTOM PROFILER SSS TOW POINT DGPS SSS TOW FISH MAGGY PROBE

28 APPENDIX B DGPS POSITIONING SYSTEM CALIBRATION Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 27 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

29 PRE-ENGINEERING GEOPHYSICAL SURVEYS CALIBRATION OF DGPS POSITIONING SYSTEM AT GEOSTAR OFFICE ROOF, NAVI MUMBAI The Leica MX-420 DGPS system was calibrated at Geostar office building established station at Navi Mumbai. The station is situated on the roof of the Geostar office building,. The DGPS system was placed on the specified station and the position was logged for duration of 5 hours & 30 minutes between 11:00 Hrs and 16:30Hrs on 11 th Sept The observed co-ordinates were compared with the previous established station in the following table; OBSERVED CO-ORDINATES AT GEOSTAR OFFICE STATION WGS 84, CM 75, ZONE 43, UTM CO-ORDINATES TIME EASTING(m) NORTHING (m) 11: : : : : : : : : : : : : : : : : : : : : : : MEAN Comparison between observed co-ordinates and previous establish station of office building station is as below. STATION: GEOSTAR OFFICE WGS 84, CM 75, Zone 43 EASTING(m) NORTHING (m) OBSERVED CO-ORDINATES IN UTM OFFICE BUILDING STATION DIFFERENCE in UTM Doc. No. GSIPL_J027_13_FINREP (Rev. 0) Dt. 25/09/2013 Geostar Surveys India Pvt. Ltd

30 APPENDIX C SOIL SAMPLE ANALYSIS Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 28 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

31 APPENDIX-C1 ON-BOARD ANALYSIS OF SOIL SAMPLES Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 29 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

32 GEOSTAR SURVEYS INDIA PVT LTD. ON-BOARD VISUAL ANALYSIS OF SOIL SAMPLES Sr. No. Sample ID PRE-ENGINEERING GEOPHYSICAL SURVEYS FOR PROPOSED OUTFALL PIPELINE, WGS -84, CM 81º E, Zone 44 UTM co-ordinates Easting (m) Northing (m) Sample Type Water Depth (m) Recovery (m) Visual Analysis Shear Strength Kg.f/cm 2 Vane Shear PP.meter Remarks 1 DC Drop core Surface- Greyish Silty Clay 0.08 <0.25 Below Surface- Greyish Silty Clay with fine sand 0.23 <0.25 Collected in PVC tube near the proposed Diffuser Point (KP 1.5). Sent to laboratory for further analysis. 2 GS Grab Sample Greyish Silty Clay with fine sand <0.25 Collected in polythene bag near KP Sent to laboratory for further analysis. 2 GS Grab Sample Greyish Silty Clay with fine sand 0.13 <0.25 Collected in polythene bag near KP Sent to laboratory for further analysis. Onboard analysis of Soil Samples Pre-Engineering surveys For Hydroair Tectonics Pvt Ltd Job No. : J027_ of 1 Gesostar Surveys India Pvt Ltd

33 APPENDIX-C2 LABORATORY ANALSIS OF SOIL SAMPLES Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 30 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

34 SUNCON ENGINEERS PVT. LTD. GEOSTAR SURVEYS INDIA PRIVAT LTD REPORT ON LABORATORY ANALYSIS OF GRAB AND DROP CORER SOIL SAMPLES KESANAPALLI, ANDHRA PRADESH, WEST COAST OF INDIA Report No:- L-71_2013 REPORT ISSUE STATUS 0 16/10/2013 Final Report DKI S. Joag S. Joag Issue Date Description Prepared Checked Approved GEOSTAR SURVEYS INDIA PVT. LTD. Geostar Sadan, Plot No.-46, Sector-19C Vashi, Maharashtra India SUNCON ENGINEERS PVT. LTD Shop No. 7Arihant Riddhi Siddhi Apartment, Sector-7 Near D-Mart, Ghansoli,, Maharashtra India

35 SUNCON ENGINEERS PVT. LTD. LIST OF CONTENTS Page No. 1 INTRODUCTION... 3 Scope of Work LABORATORY TESTING... 4 LIST OF TABLES Table 1 Details Of Soil Samples... 3 LIST OF ANNEXURES ANNEXURE-I TO APPENDIX-C2 SUMMARY OF SOIL TEST RESULTS ANNEXURE-II TO APPENDIX-C2 DETAILED PHYSICAL TEST RESULTS MOISTURE CONTENT DRY UNIT SOIL DENSITY GRAIN SIZE DISTRIBUTION DIRECT SHEAR TEST SPECIFIC GRAVITY, ATTERBERG LIMITS CARBONATE CONTENTS, ORGANIC CONTENTS CHLORIDES AND SULPHATES ELECTRICAL RESISTIVITY

36 SUNCON ENGINEERS PVT. LTD. 1 INTRODUCTION M/s Geostar Survey India Pvt. Ltd. (GSIPL) hence forth referred as client had submitted a total of two (2) Grab Soil samples and one (1) drop core sample in polythene bags to Suncon Engineers Laboratory for testing. The laboratory tests were carried out in accordance with the test schedule approved by GSIPL Suncon Engineers was not involved in sample collection. The samples were tested as they were submitted and received by Suncon Engineers Laboratory. Scope of Work Scope of work included performing laboratory tests as relevant Indian Standers and compiling the data of laboratory test. The Laboratory analysis comprised: Natural moisture Dry unit soil density Grain Size Distribution Specific Gravity Atterberg limits Direct shear test Carbonate contents, ORGANIC contents (were these tests performed?), Chlorides and Sulphates Electrical resistivity The sample number, respective co-ordinates and relative position of soil in the sample, as provided by client to Suncon Engineers are given in Table 1 SR. No 1 Soil Sample ID Top Bottom UTM Co-ordinates Easting (m) Northing (m) Recovery (In meters) Grab Grab Remarks Collected in PVC Pipe by client Collected in PVC Pipe by client Collected in Polythene bag by client Collected in Polythene bag by client Table 1 Details Of Soil Samples *As Provided by GSIPL.

37 SUNCON ENGINEERS PVT. LTD. 2 LABORATORY TESTING Grab and drop corer soil samples in polythene bag and PVC pipe were received in the laboratory. The laboratory tests were to be carried out in accordance with relevant parts of Indian Standard Code of Practice at our laboratory in. It has been observed after opening of the tube and polythene bags from the state of samples received that considerable amount of time might have been lost from the time the samples have been collected and tested in the laboratory. Also possibility of sampling disturbance during transportation needs to be considered. There may be loss or readjustment of moisture content in the samples. In soft to very soft clayey soil, the moisture lose can slightly increase the shear strength or vice versa. This aspect need to be considered while evaluating the soil shear strength in design. Values of shear strength and moisture content parameters can be considered indicative only. Following tests were performed as follows: Sr no. Test Designation Qty Relevant Indian Standards 1 Moisture Content 3 IS:2720 (Part - 2) 2 Wet & Dry Unit soil density 3 IS:2720 Part 7 3 Grain size distribution Sieve and Hydrometer Test 3 IS:2720 Part 4 4 Specific Gravity 3 IS:2720 Part -3/ Sec-1 5 Atterberg Limits 3 IS: 2720 Part 5 6 DIRECT SHEAR TEST IS: 2720 Part13 7 Carbonate contents Titrimetric 8 ORGANIC contents In-house (Titrimetric) 9 Chlorides IS:3025 (Part-32-2): Sulphates IS:3025 (Part-24-4): Electrical resistivity IS: 3025 (Part-14): 1996

38 SUNCON ENGINEERS PVT. LTD. ANNEXURE-I TO APPENDIX-C2

39 SUNCON ENGINEERS PVT. LTD. SUMMARY OF LABORATORY TEST RESULTS Lob No. L-71 Project: LABORATORY ANALYSIS OF GRAB SOIL SAMPLES FOR KARWAR, WEST COAST OF INDIA Client : GSPL Soil Sample ID. Recovery(m) Test Location Shear strength CLASSIFICATION TESTS Density & Moisture content Cohesive C u Degree Electrical resistivity Kg/cm 2 Sp. Gravity Atterberg Limits (%) Particle Size Distribution (%) Symbol Soil Description Moisture content Density (gm/cm2) Wet Dry Su bm erg ed Sulph ate CHMICAL TEST ON SOIL SAMPLE CL Carbo nate conte nt Orga nic conte nt Wl Wp IP Clay Silt Sand Gravel % % % % DC-1 Top CH Greyish Soft Silty CLAY Nill Bottom CH Greyish Silty Clay With sand Nill Grab -1 Grab Sample CL Greyish Silty Clay With Fine sand Nill Grab -2 Grab Sample CL Greyish Silty Clay With Fine sand Nill 10.98

40 SUNCON ENGINEERS PVT. LTD. ANNEXURE-II TO APPENDIX-C2

41 Project : Clients : Geostat Surveys India Pvt. Ltd. SOIL TEST DATA SHEET Geophysical Surveys, of Kesanapalli, Andhra Pradesh, East Coast of India for Hydroair Tectonics (SDP) P.vt Ltd. Date : Sample Recovery (m) Visual Side Sample Type Density Wet Dry Natural Moisture Content Soil Classification Gravel Mechanical Analysis Sand Silt Clay Consistancy Limits Liquid Plastic Plasticity Index, I p Shrinkage S L Type Shear Strength Test Cohesion C u Degree Swelling Pressure Permeability Specific Gravity Remarks No UD/SPT gm/cm 3 % IS % % % % % % % % kg/cm 2 f kg/c m 2 cm/ sec G DC Top Drop Corer CH DC Bottom Drop Corer CH Grab Grab sample CL Grab Grab sample CL DS UU DS UU DS UU DS UU Remold Remold SPT : Standard Penetration Test DS : Direct Shear test f : Angle of Internal Friction K : Permeability Test UDS : Undisturbed Soil Sample UU : Unconsolidated Undrained Cu : Undrained Cohesion CHEM Chemical Analysis SUNCON ENGINEERS PVT. LTD., NAVI MUMBAI Job No. Checked L-71 S. Joag

42 SUNCON ENGINEERS PVT. LTD., NAVI MUMBAI Job No. Checked L-71 S.Joag Particle Size(mm) 100 PERCENTAGE FINER THAN Symbol GRAVEL SAND C F C M F x10-3 2x Classifi Grave Sample Recover Visual Sand Silt Clay cation l f 10% f 30% f 60% y (m) Side No. IS % % % % mm mm mm PARTICLE SIZE ( mm ) Coefficient of Uniformity, C u = D 60 /D 10 Coefficient of Curvature C c D 30 2 /(D 60 *D 10 ) DC-1 Top CH Drop Corer DC-1 Bottom CH Drop Corer Grab-1 CL Grab sample Grab-2 CL Grab sample SILT 0.01 Liquid Limit, Wl CLAY Plastic Limit, W p Plasticity Index, I p Remarks Clients : Geostat Surveys India Pvt. Ltd. Project : Geophysical Surveys, of Kesanapalli, Andhra Pradesh, East Coast of India for Hydroair Tectonics (SDP) P.vt Ltd. GRAIN SIZE DISTRIBUTION ANALYSIS

43 Project Clients : Geostat Surveys India Pvt. Ltd. Width of Specimen cm Date : Length of Specimen cm Bore Hole No. : DC-1 Hight of Specimen cm Depth in mtrs. : Top Area of Specimen cm 2 Type of Sample : Drop Core Volume of Specimen cm 3 Condition of Test : UU Compact Density ---- gm/cm 3 Rate of Strain : 1.25 mm/min Wet Density gm/cm 3 Least Count of Strain Dial Gauge : 0.01 mm Dry Density gm/cm 3 Proving Ring No. : 1027 Moisture Content % Least Count of Proving Ring : kg/div. Serial DIRECT SHEAR TEST IS : 2720 PART 13 Geophysical Surveys, of Kesanapalli, Andhra Pradesh, East Coast of India for Hydroair Tectonics (SDP) P.vt Ltd. Normal Stress s 3 Force at Failure Load Shear Stress at Failure Load Strain Dial Gauge Reading at failure Change in Length at Failure,D L Shear displacem ent at Failure,e Corrected area at Failure Shear Stress at Failure d d No. Kg/cm 2 Div. kg Div. cm % cm 2 Kg/cm Remarks 1.2 Shear Stress in Kg/cm Normal Stress in Kg/cm 2 Cohesion, C u kg/cm 2 : Angle of internal friction, f 0 : SUNCON ENGINEERS PVT LTD NAVI MUMBAI Job No. L-71 Checked S. Joag

44 Project Clients : Geostat Surveys India Pvt. Ltd. Width of Specimen cm Date : Length of Specimen cm Bore Hole No. : DC-1 Hight of Specimen cm Depth in mtrs. : Bottom Area of Specimen cm 2 Type of Sample : Drop Core Volume of Specimen cm 3 Condition of Test : UU Compact Density ---- gm/cm 3 Rate of Strain : 1.25 mm/min Wet Density gm/cm 3 Least Count of Strain Dial Gauge : 0.01 mm Dry Density gm/cm 3 Proving Ring No. : 1027 Moisture Content % Least Count of Proving Ring : kg/div. Serial DIRECT SHEAR TEST IS : 2720 PART 13 Geophysical Surveys, of Kesanapalli, Andhra Pradesh, East Coast of India for Hydroair Tectonics (SDP) P.vt Ltd. Normal Stress s 3 Force at Failure Load Shear Stress at Failure Load Strain Dial Gauge Reading at failure Change in Length at Failure,D L Shear displacem ent at Failure,e Corrected area at Failure Shear Stress at Failure d d No. Kg/cm 2 Div. kg Div. cm % cm 2 Kg/cm Remarks 1.2 Shear Stress in Kg/cm Normal Stress in Kg/cm 2 Cohesion, C u kg/cm 2 : Angle of internal friction, f 0 : SUNCON ENGINEERS PVT LTD NAVI MUMBAI Job No. L-71 Checked S. Joag

45 Project Clients : Geostat Surveys India Pvt. Ltd. Width of Specimen cm Date : Length of Specimen cm Bore Hole No. : Grab-1 Hight of Specimen cm Depth in mtrs. : Area of Specimen cm 2 Type of Sample : Volume of Specimen cm 3 Condition of Test : UU Compact Density ---- gm/cm 3 Rate of Strain : 1.25 mm/min Wet Density gm/cm 3 Least Count of Strain Dial Gauge : 0.01 mm Dry Density gm/cm 3 Proving Ring No. : 1027 Moisture Content % Least Count of Proving Ring : kg/div. Serial DIRECT SHEAR TEST IS : 2720 PART 13 Geophysical Surveys, of Kesanapalli, Andhra Pradesh, East Coast of India for Hydroair Tectonics (SDP) P.vt Ltd. Normal Stress s 3 Force at Failure Load Shear Stress at Failure Load Strain Dial Gauge Reading at failure Change in Length at Failure,D L Shear displacem ent at Failure,e Corrected area at Failure Shear Stress at Failure d d No. Kg/cm 2 Div. kg Div. cm % cm 2 Kg/cm Remarks 1.2 Shear Stress in Kg/cm Normal Stress in Kg/cm 2 Cohesion, C u kg/cm 2 : Angle of internal friction, f 0 : SUNCON ENGINEERS PVT LTD NAVI MUMBAI Job No. L-71 Checked S. Joag

46 Project Clients : Geostat Surveys India Pvt. Ltd. Width of Specimen cm Date : Length of Specimen cm Bore Hole No. : Grab-2 Hight of Specimen cm Depth in mtrs. : Area of Specimen cm 2 Type of Sample : Volume of Specimen cm 3 Condition of Test : UU Compact Density ---- gm/cm 3 Rate of Strain : 1.25 mm/min Wet Density gm/cm 3 Least Count of Strain Dial Gauge : 0.01 mm Dry Density gm/cm 3 Proving Ring No. : 1027 Moisture Content % Least Count of Proving Ring : kg/div. Serial DIRECT SHEAR TEST IS : 2720 PART 13 Geophysical Surveys, of Kesanapalli, Andhra Pradesh, East Coast of India for Hydroair Tectonics (SDP) P.vt Ltd. Normal Stress s 3 Force at Failure Load Shear Stress at Failure Load Strain Dial Gauge Reading at failure Change in Length at Failure,D L Shear displacem ent at Failure,e Corrected area at Failure Shear Stress at Failure d d No. Kg/cm 2 Div. kg Div. cm % cm 2 Kg/cm Remarks 1.2 Shear Stress in Kg/cm Normal Stress in Kg/cm 2 Cohesion, C u kg/cm 2 : Angle of internal friction, f 0 : SUNCON ENGINEERS PVT LTD NAVI MUMBAI Job No. L-71 Checked S. Joag

47 APPENDIX D PREDICTED TIDE READINGS AND GRAPHS Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 31 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

48 PRE-ENGINEERING GEOPHYSICAL SURVEYS 18-Sept-2013 Time Tide 0: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Sept-2013 Time Tide 8: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Sept-2013 Time Tide 17: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Doc. No. GSIPL_J027_13_FINREP (Rev. 0) Dt. 25/09/2013 Geostar Surveys India Pvt. Ltd

49 PRE-ENGINEERING GEOPHYSICAL SURVEYS 19-Sept-2013 Time Tide 0: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Sept-2013 Time Tide 8: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Sept-2013 Time Tide 16: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Doc. No. GSIPL_J027_13_FINREP (Rev. 0) Dt. 25/09/2013 Geostar Surveys India Pvt. Ltd

50 PRE-ENGINEERING GEOPHYSICAL SURVEYS 20-Sept-2013 Time Tide 0: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Sept-2013 Time Tide 8: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Sept-2013 Time Tide 16: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Doc. No. GSIPL_J027_13_FINREP (Rev. 0) Dt. 25/09/2013 Geostar Surveys India Pvt. Ltd

51 PRE-ENGINEERING GEOPHYSICAL SURVEYS Doc. No. GSIPL_J027_13_FINREP (Rev. 0) Dt. 25/09/2013 Geostar Surveys India Pvt. Ltd

52 APPENDIX E EXTRACTS FROM FIELD RECORDS Doc. No. GSIPL_J027_13_FINREP (Rev. 0) 32 Geostar Surveys India Pvt. Ltd Dt. 16/10/2013

53 Single Beam Echosounder Extract 2m 2m 3m 3m 4m 4m 5m Depth Scale Record Information: SBES data extract showing Single beam echo sounder calibration by Bar check method Project No.: JO27_2013 Location: At Kesanapalli, East coast of India Figure 1: SBES Data Extract

54 SOUTH Single Beam Echosounder Extract NORTH Fix No Depth Scale Raw Seabed Record Information: SBES data extract showing Raw Seabed in the proposed HDPE pipeline route from KP to KP Project No.: JO27_2013 Location: At Kesanapalli, East coast of India Figure 2: SBES Data Extract

55 NORTH Single Beam Echosounder Extract SOUTH Fix No Raw Seabed Proposed Diffuser Location Depth Scale Record Information: SBES data extract showing Raw Seabed and proposed Diffuser location Project No.: JO27_2013 Location: At Kesanapalli, East coast of India Figure 3: SBES Data Extract

56 WEST Single Beam Echosounder Extract EAST Fix No Raw Seabed Proposed Diffuser Location Depth Scale Record Information: SBES data extract showing Raw Seabed and proposed Diffuser location Project No.: JO27_2013 Location: At Kesanapalli, East coast of India Figure 4: SBES Data Extract

57 SOUTH Side Scan Sonar Data Extract NORTH Port Side Vessel Track Fix No Starboard Side Low to Medium Reflective Sediments Scale Lines Approx. 25m Approx. 25m Seabed Record Information: SSS data extract showing Seabed and Low to medium reflective sediments Near KP Project No.: JO27_2013 Location: At Kesanapalli, East coast of India Figure 5: SSS Data Extract

58 SOUTH Side Scan Sonar Data Extract NORTH Port Side Vessel Track Starboard Side Scale Lines Approx. 25m Approx. 25m Seabed Proposed Diffuser Location Fix No Record Information: SSS data extract showing Seabed and proposed diffuser location at KP Project No.: JO27_2013 Location: At Kesanapalli, East coast of India Figure 6: SSS Data Extract

59 NORTH Sub Bottom profiler Data Extract SOUTH Proposed Diffuser location Seabed UNIT-A UNIT-B Fix No Record Information: SBP data extract showing proposed diffuser location and shallow stratigraphy in the proposed HDPE outfall pipeline route from KP to KP Project No.: JO27_2013 Location: At Kesanapalli, East coast of India Figure 7: SBP Data Extract

60 NORTH Sub Bottom profiler Data Extract SOUTH Seabed UNIT-A UNIT-B Fix No Record Information: SBP data extract showing proposed diffuser location and shallow stratigraphy in the proposed HDPE pipeline route from KP to KP Project No.: JO27_2013 Location: At Kesanapalli, East coast of India Figure 8: SBP Data Extract

61 SOUTH Magnetometer Data Extract NORTH Record Information: Magnetometer data extract showing ambient magnetic field in the proposed HDPE pipeline route from KP to KP Project No.: JO27_2013 Location: At Kesanapalli, East coast of India Figure 9: Magnetometer Data Extract