Annex B


General information for a desk study

B.1 General land survey

Information on the following is needed to carry out a general land survey (see also Annex C):

  • a) location of site on published maps and charts;
  • b) aerial imagery of suitable spatial scale, all dated and geo-located where appropriate;
  • c) site boundaries, outlines of structures and building lines;
  • d) ground contours and natural drainage features;
  • e) obstructions to sight lines and ship/aircraft movement, for example transmission lines;
  • f) indication of obstructions below ground;
  • g) indication of the possible presence of Unexploded Ordnance;
  • h) routes of services/utilities or infrastructure including underground or overground pipes or cables;
  • i) record of differences and omissions in relation to published maps;
  • j) position of survey stations and benchmarks (the latter with reduced levels); and
  • k) meteorological information.

B.2 Permitted uses and restrictions

The following information on permitted uses and restrictions is needed:

  • a) planning and statutory restrictions applying to the particular areas under the Town and Country Planning Acts administered by appropriate planning authorities;
  • b) local authority regulations on planning restrictions, listed buildings and building bye-laws;
  • c) right of light, support and way, including any easements, land covenants and structural precautions;
  • d) tunnels; mine workings, abandoned, active and proposed, mineral rights and ownership, and authorizations/permits to work (e.g. Network Rail and the Coal Authority);
  • e) ancient monuments and burial grounds;
  • f) previous potentially contaminative uses of the site and adjacent areas (see 17.9, BS 10175 and BS 8576);
  • g) any restrictions imposed by environmental and ecological considerations, e.g. sites of special scientific interest;
  • h) working near watercourses: any permitting required by the Environment Agency;
  • i) duty of care requirements to local residents, e.g. noise and vibration; and
  • j) working hours, e.g. night time working due to traffic management restrictions.

B.3 Approaches and access (including temporary access for construction purposes)

Information on the following is needed:

  • a) road (check ownership and potential need for traffic management);
  • b) railway (check for closure);
  • c) by water;
  • d) by air;
  • e) for coastal investigations: tide levels and timings; and
  • f) land use (for example arable or pasture) and vegetation (for example, grassed playing field or woodland).

B.4 Ground conditions

The following information on ground conditions is needed:

  • a) geological maps including soil maps, hydrogeological maps, aquifer designation maps (see C.2.1);
  • b) geological memoirs;
  • c) previous land use from, for example, Ordnance Survey maps;
  • d) flooding, erosion, landslide, mining and subsidence history;
  • e) data held by central and local authorities;
  • f) previous and current construction and investigation records of the site and adjacent sites (as applicable);
  • g) seismicity;
  • h) lake, reservoir, tide levels and timings; and
  • i) information related to voids.

B.5 Sources of material for construction

Information on the following sources of material for construction is needed:

  • a) natural materials;
  • b) groundwater;
  • c) tips and waste materials; and
  • d) imported materials.

B.6 Drainage and sewage

The following information on drainage and sewage is needed:

  • a) names of sewage, land drainage and other authorities concerned and their bye-laws;
  • b) locations and levels of existing systems (including field drains and ditches), showing sizes of pipes, and whether foul, storm water or combined;
  • c) existing flow quantities and capacity for additional flow;
  • d) liability to surcharging;
  • e) charges for drainage and disposal facilities;
  • f) neighbouring streams or public sewers capable of taking sewage or trade effluents provided they are purified to the required standard;
  • g) disposal of solid waste; and h) flood risk to proposed works.

B.7 Water supply including groundwater

The following information on water supply is needed:

  • a) names of authorities concerned and their bye-laws;
  • b) locations, sizes and depths of mains;
  • c) pressure characteristics of mains;
  • d) water analysis;
  • e) availability of water for additional requirements;
  • f) storage requirements;
  • g) water source for fire-fighting;
  • h) charges for connections and water;
  • i) possible additional sources of water including groundwater; and
  • j) water rights and responsibilities under the Water Resources Act 1991 [166].

B.8 Electricity supply

The following information on electricity supply is needed:

  • a) names of supply authorities concerned and regulations;
  • b) locations of existing electricity supply infrastructure;
  • c) the voltage, phases and frequency;
  • d) capacity to supply additional requirements;
  • e) transformer requirements; and
  • f) charges for installation and usage.

B.9 Gas supply

The following information on gas supply is needed:

  • a) names of supply authorities concerned and regulations;
  • b) locations, sizes and depths of mains;
  • c) type of gas, thermal quality and pressure;
  • d) capacity to supply additional requirements; and
  • e) charges for installation and gas usage.

B.10 Telecommunications

The following information on telecommunications is needed:

  • a) addresses of local offices;
  • b) location of existing lines;
  • c) telephone agency requirements; and
  • d) charges for installation and operation.

B.11 Heating

The following information on heating is needed:

  • a) availability of fuel supplies;
  • b) planning restrictions (smokeless zone; Clean Air Act 1993 [167] administered by local authorities); and
  • c) district heating.

B.12 Information related to potential contamination

The following information is needed to assess the potential for contamination:

  • a) history of the site, including details of owners, occupiers and users, and any incidents or accidents relating to dispersal of contaminants;
  • b) processes used, including their locations;
  • c) nature and volume of raw materials, products, waste residues;
  • d) waste disposal activities and methods of handling waste;
  • e) layout of the site above and below ground at each stage of development, including roadways, storage areas, hard-cover areas, and the presence of any extant structures and services;
  • f) presence of any waste disposal tips, abandoned pits, mines and quarries; and
  • g) presence of nearby sources of contamination from which contaminants could migrate via air and/or groundwater onto the site under consideration.