GAVESHANA GEOSCIENCES PRIVATE LIMITED (An ISO 9001:2008 Certified Company) WHO WE ARE Gaveshana Geosciences Private Limited, a company registered under the Companies Act 1956, provides consultancy and services in various near surface investigations, geo-technical studies, exploration activities and energy. Organized and managed by a team of experienced professionals, the company provides services in the following application areas: Ground Penetrating Radar (GPR) Survey Cable & Pipe Locator Survey Seismic Refraction / Reflection Survey Electrical Resistivity Survey Seismic Crosshole / Downhole Test Geodetic Survey Mineral Exploration Energy & Exploration Consultancy GROUND PENETRATING RADAR (GPR) SURVEY Near surface investigations using Ground Penetrating Radar (GPR) is a non-destructive technique to produce a cross section profile of subsurface without any drilling, trenching or ground disturbances. The profiles are used for detecting buried utilities, such as, pipes, cables, etc in totally non-destructive manner. Applicable Standard The company follows ASTM standard designation D643299 in equipment, field procedures, and interpretation methods for the assessment of subsurface materials while using the Ground Penetrating Radar (GPR). Applicable Standard The company follows ASTM standard designation D643299 in equipment, field procedures, and interpretation methods for the assessment of subsurface materials while using the Ground Penetrating Radar (GPR). Depth to Water Table Depth to Bedrock Depth & Thickness of Soil Strata Location of Subsurface Cavities Depth to Water Table Depth to Bedrock Depth & Thickness of Soil Strata Location of Subsurface Cavities Pipes (Metallic & Non-Metallic) Underground Storage Tanks (UTS) Drums, Sewer & Boulders Electric Cables Pipes (Metallic & Non-Metallic) Underground Storage Tanks (UTS) Drums, Sewer & Boulders Electric Cables Inspection of Masonry Inspection of Concrete Structures Archaeological Investigations Forensic Applications Inspection of Masonry Inspection of Concrete Structures Archaeological Investigations Forensic Applications Roads and Railroad Track-Bed Highway Bridge Scour Studies Roads and Railroad Track-Bed Highway Bridge Scour Studies Mapping Geologic Conditions Location of Buried Utilities Inspection & Investigation Studies SEISMIC REFRACTION SURVEY Seismic Refraction measurements find applications in mapping geologic, geotechnical, hydrologic, environmental, mineral exploration, petroleum exploration, and archaeological investigations. The seismic wave velocities are related to the mechanical properties of earth. Hence, seismic velocity coupled with complementary geological information (borehole logs, geological maps, outcrops data, etc) yield vital information on characterization of subsurface material, such as, type of rock, degree of weathering, elasticity, and rippability. Applicable Standard The company follows ASTM Standard Designation D5777 Guide while using the Seismic Refraction Method for Subsurface Investigations. Applicable Standard The company follows ASTM Standard Designation D5777 Guide while using the Seismic Refraction Method for Subsurface Investigations. SEISMIC CROSSHOLE TEST The Seismic Cross Hole Test yields detailed measurements of in-situ compressional and shear wave velocities in cased boreholes typically spaced 3 to 6 m apart. The Cross Hole test provides information pertinent to the seismic wave velocities of the material in question. These velocities are used as input into site specific static / dynamic analyses, or for computing Shear Modulus, Youngs Modulus, and Poissons Ratio for material characterization, or for determination of lateral heterogeneity existing at site. Applicable Standard The company follows ASTM Standard Designation D4428/D4428M Guide while using the Seismic Crosshole Test for Subsurface Investigations. Applicable Standard The company follows ASTM Standard Designation D4428/D4428M Guide while using the Seismic Crosshole Test for Subsurface Investigations. Bedrock Profile Thickness of Overburden Bedrock Profile Thickness of Overburden Lateral & Vertical Material Continuity Liquefaction Analysis Lateral & Vertical Material Continuity Liquefaction Analysis In-Situ Seismic (P & S) wave velocities Studies of Deformation Studies of Amplification & Attenuation of Ground Motion Studies of Deformation Studies of Amplification & Attenuation of Ground Motion Mapping Evaluation Profiling Studies SEISMIC DOWNHOLE TEST This test method is applied for determination of the interval velocities from arrival times and relative arrival times of compression (P) and vertically (SV) and horizontally (SH) polarized shear (S) seismic waves which are generated near surface and travel down to an array of vertically installed seismic sensors. The method provides accurate in-situ P and S wave velocities essential for use in geotechnical foundation designs. The results are used in analyses of soil behavior in both static and dynamic loads where elastic constants are input variables into the models defining different states of deformations such as elastic, elasto-plastic, and failure. Another use of estimated shear wave velocities in geotechnical design is in liquefaction assessment of soils. Applicable Standard The company follows ASTM Standard Designation ASTM D Guide while using the Seismic Downhole Test for Subsurface Investigations. Applicable Standard The company follows ASTM Standard Designation ASTM D Guide while using the Seismic Downhole Test for Subsurface Investigations. In-Situ Seismic (P & S) wave velocities Applicable in Earthquake Engineering & Structural Design Applicable in Earthquake Engineering & Structural Design Studies of Deformation Studies of Amplification & Attenuation of Ground Motion Liquefaction Analysis Studies of Deformation Studies of Amplification & Attenuation of Ground Motion Liquefaction Analysis Profiling Site Response Modeling Studies & Analysis SEISMIC CROSSHOLE TOMOGRAPHY This technique is used for detailed and targeted evaluation of material. The method involves measurement of seismic travel times between two or more boreholes to define an image of seismic velocities in the intervening ground. Data is collected placing a seismic source in one hole (termed the source borehole) and measuring first-arrival times using strings of hydrophones in the other holes (termed receiver boreholes). Travel times are collected at regular intervals (usually 0.5 m to 2 m) all the way down the hole(s) for each shot position. This results in a network of overlapping ray paths that can then be used to model the velocity profile. The resulting velocity image is termed a tomogram and enables identification of anomalous velocity zones lying between the boreholes as well as imaging individual velocity layers. Applicable Standard The company follows ASTM Standard Designation ASTM D4428/D4428M Guide while using the Seismic Crosshole Tomography for Subsurface Investigations. Applicable Standard The company follows ASTM Standard Designation ASTM D4428/D4428M Guide while using the Seismic Crosshole Tomography for Subsurface Investigations. Identification of Fault Zones Identification of Voids Identification of Fault Zones Identification of Voids Loose Zones Sinkholes Anomalous Zones in structures Loose Zones Sinkholes Anomalous Zones in structures Effective in study of old foundations Identification Mapping Study ELECTRICAL RESISTIVITY TOMOGRAPHY DC resistivity techniques, sometimes referred to as Electrical Resistivity (ER), Electrical Resistivity Imaging (ERI) or Vertical Electric Sounding (VES), measure earth resistivity by driving a direct current (DC) signal into the ground and measuring the resulting potentials (voltages) created in the earth. From that data, electrical properties of the earth (the geo-electric section) can be derived and thereby the geologic properties inferred. Applicable Standard The company follows ASTM Standard Designation ASTM D Guide while using the Electrical Resistivity Method for Subsurface Investigations. Applicable Standard The company follows ASTM Standard Designation ASTM D Guide while using the Electrical Resistivity Method for Subsurface Investigations. Depth to Bedrock Depth to Water Table Depth to Geo-electric Boundaries Depth to Bedrock Depth to Water Table Depth to Geo-electric Boundaries Geologic Features Aggregate deposits for quarry operations Geologic Features Aggregate deposits for quarry operations Earth Impedance or Resistance Cathodic Protection Earth Impedance or Resistance Cathodic Protection Estimation Mapping Study GEODETIC SURVEYS The Company provides the following range of topographic survey services using DGPS and Total Stations Boundary Surveys: for marking precise boundary of a project on ground Route Surveys: for proposed routes of transportation and communication, such as, transmission lines, pipelines and tunnels Design Surveys: to establish alignment on ground and obtain data necessary for preparation of construction plans Land Surveys: for laying off or the measurement of lengths and directions of lines forming the boundaries of land or real property. Construction Surveys: such as, highway pre-construction, construction and post construction surveys Topographic Surveys: for various geological and geophysical exploration surveys such as 2D/3D Seismic surveys, Gravity surveys, etc. Contour Surveys: for land and water bodies CONSULTANCY SERVICES SOLAR ENERGY APPLICATION Thermal modeling of solar air and water heaters Solar collectors and storage systems Solar distillation systems Solar space conditioning Solar electricity WIND ENERGY APPLICATION Wind resource assessment Environmental assessment Design and construction GEOTHERMAL ENERGY Geothermal resource mapping Micro-seismic studies Space heating and air-conditioning Electric power generation PETROLEUM EXPLORATION Block Evaluation 2D/3D Seismic survey design, resource planning Quality Assurance and Quality Control 2D/3D seismic data processing Bore log and seismic data interpretation, and GGR analyses Quality Health Safety and Environment We are an ISO 9001:2008 Certified Company registered by Det Norske Veritas (DNV). We endeavor to excel through the quality of our services. We follow the safety first' rule in all work practices. We are committed to the goal of a "Zero Accident operation. We strive to minimize pollution and waste generation in all our work practices. SALIENT FEATURES OF OUR QHSE PROCEDURES We conduct our practices as per the standard quality norms. We continually improve upon the quality of our services through regular internal training and technology absorption. We strictly adhere to safety rules and usage of mandatory PPEs. We follow hazard identification and risk mitigation practices. We consciously make efforts to minimize pollution and waste generation at work places. We encourage routine inter-group and intra-group QHSE communications. OUR CLIENTELE Delhi TRANSCO Ltd Rail Vikas Nigam Ltd Gujarat Gas Company Ltd Uranium Corporation of India Green Gas Ltd PWD Delhi Northern Railways Delhi Jal Board Municipal Corporation of Delhi DLF Himachal Futuristic Communications Ltd Sewerage and Infrastructural Development Corporation of Goa Mos Metro India Oil India Limited UP Jal Nigam Gaveshana Geosciences Pvt Ltd enjoys the confidence and continued patronage of its valued Clientele. Some of the main end Clients for whom the Company has been providing various services are: CONTACT US GAVESHANA GEOSCIENCES PRIVATE LIMITED Head Office: 101, Pankaj Chambers, H-Pocket Market, Sarita Vihar, New Delhi Ph: ,Cell: , Branch Office: 944, Indira Nagar, Dehradun (Uttarakhand) Ph: , Cell: Visit us at