Table below provides a comprehensive checklist for overall layout of Plant Utility Area.

Sr.No Check Description
1 General requirements
1.1 Group site utility services together in an area classified as non-hazardous except when they are an integral part of a process unit.
1.2 Locate such that essential utility supplies can be maintained under emergency conditions (e.g. in the event of a flammable vapour release).
1.3 Determine the separation distance considering a risk based approach such that essential utility supply functions can be maintained within an agreed reliability.
1.4 Locate close to units that are largest utility users.
1.5 Locate adjacent to process area to minimise piping runs.
1.6 Locate cooling towers, power stations and electrical substations away from hazardous areas.
2 Air Compressors
2.1 Group together and line up in a common shelter along the primary roads for easy maintenance access.
2.2 Keep adequate separation from fired steam boilers and power generators.
3 Boilers
3.1 Locate fuel oil tanks/pumps and heat exchangers away from other utility equipment.
3.2 Locate fired steam boilers at least 30m from process equipment.
4 Air Intakes and Discharges
4.1 Locate HVAC air intakes upwind/crosswind and away from hazardous areas and generator exhausts.
4.2 Locate air intakes for HVAC, gas turbines, internal combustion engines, air compressors, etc. as far as practicable from areas where air contamination by dust, flammable or toxic gas can occur.
4.3 Locate air discharges from heating and ventilating systems, and blow-off facilities associated with air compressors and fans, such that they will not cause a hazard or inconvenience to personnel nor affect the access to, and operation of, adjacent equipment.
4.4 Separate intakes and discharges to prevent cross contamination by recirculation taking into account natural wind effects.
5 Gas Turbine Generators
5.1 Group together and line up in common shelter along the primary road for easy maintenance.
5.2 Locate outside in a safe area and remote from process area.
5.3 Provide adequate maintenance area.
6 Diesel Storage Tanks
6.1 Line up along the primary road.
6.2 Make provision for unloading bay.
6.3 Locate remote from potential ignition sources.
7 Diesel Generators
7.1 Group together and line up in a common shelter along the primary road for easy maintenance.
7.2 Locate away from possible hydrocarbon releases.
8 Cooling Towers
8.1 Consider the direction of the prevailing wind in selecting the location of cooling towers. 
8.2 Locate downwind from the rest of installation (e.g. buildings, process units, electrical substations and equipment).
8.3 Ensure water drift and fog due to prevailing wind do not restrict visibility of roads within and outside plant boundaries as well as other public amenities or cause ice formation on roads.
9 Main Substations
9.1 Locate close to property line.
9.2 Locate outside hazardous area.
9.3 Should not be part of administration buildings, workshops and laboratories.
9.4 Locate away from process prea or equipment containing flammable products.
9.5 Locate overhead power lines 15m outside the plant fence.
10 Unit Substations
10.1 Locate outside hazardous area and at least 15m away from all equipment handling hydrocarbons.
11 Battery Rooms
11.1 Make provision for adequately ventilated enclosure.
11.2 Make provision for a separate airlock.
12 Transformers
12.1 Locate in a well ventilated area along primary road.
12.2 Locate near substation.
13 Fire Pumphouse
13.1 Locate in a safe area free from explosive vapors or damage due to impact from mobile equipment.
13.2 Locate away from process units, product storage tanks or flares to minimise the risk of damage to the pumps.
13.3 Locate primary and secondary firewater pumps in different areas to prevent common mode failure.