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2.6.4 Health and Safety Plans 2.6.5 Community Relation Plan (CRP) Shalt Provide The Public Information On: 2.6.5.1 Investigation activities 2.6.5.2 Cleanup activities 2.6.5.3 Public comment opportunities 2.6.5.4 Cleanup Decisions The investigations in sections 2.7 through 2.11 below should result in data of adequate technical content to characterize the site and its actual or potential hazard to public health and environment and support the development and evaluation of remedial alternatives during FS. 2.7 Environmental Settings 2.7.1 Regional Physiography and Topography 2.7.2 Regional & Site Geology 2.7.2.1 Stratigraphy 2.7.2.2 Soils' attenuation capacity and mechanisms 2.7.2.3 Other soil properties: structure, porosity, mineralogy, grain size distribution 2.7.2.4Regional geology 2.7.3 Regional & Site Hydrogeology 2.7.3.1 Hydraulic testings: obtain data for the development and evaluation of alternatives in OUFS and FS 2.7.3.2 Aquifer tests to determine aquifer parameters and connection between aquifers 2.7.3.3 Determine depths of water tables 2.7.3.4 Determine groundwater flows 2.7.3.5 Define areas of recharge and discharge 2.7.3.6 Vertical gradients 2.7.3.7 hydraulic barriers (fa ults,bed rock, constant head sources) 2.7.3.8 Vadose Zone monitoring: moisture content, unsaturated conductivities and relative permeabilities 2.7.3.9Regional groundwater quality 2.7.3.10flow model(s) 2.7.4 Regional and site surface water quality 2.7.5 Regional and site meteorology and air quality 2.7.6 Regional and site surface water quality 2.7.7 Regional & Site Land Use 2.7.8 Regional & Site Biology 2.8(a) Site-specific Source Characterization Plan ( efforts should begin with a survey of previous studies and other existing data, see section 2.3) 2.8(b) Site-specific Source Characterization Plan ( efforts should begin with a survey of previous studies and other existing data, see section 2.3) ec -A3-6-