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Tag: Study type: Screening LCA

C-05 Transport of wastes to landfill, incineration and recycling facilities – screening and simplified LCA

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Aspect C-05 Transport of wastes to landfill, incineration and recycling facilities – screening and simplified LCA
Description
 The transportation distances are likely to be different, depending on the EoL scenarios. For example, whereas a landfill facility is likely to be found in every city, a recycling plant may be far away as, for example, only one exists in a country exists.In this context, how should representative distances according to different waste EoL routes be defined for screening and simplified LCA?

related study objective

 ☒ stand-alone LCA ☒ comparative assertion

related study phase

 ☒ ☐ ☐ ☐ ☐
goal and scope definition inventory analysis (LCI) impact assessment (LCIA) interpretation reporting

relevant for
new buildings existing buildings construction products screening LCA simplified LCA complete LCA
Provisions The transport of wastes or recycled products to EoL facilities remains optional for screening and simplified LCA, owing to the assumed minor relevance.This aspect is likely to be predefined, for example in generic LCA data for EoL processes or in each national EPD programme, and may be adopted within a given LCA study.
Rules from:

EN 15804

 

 6.3.4.6 End-of-life stage
6.3.8 Developing product scenarios
7.3 Scenarios and additional technical information
7.3.4 End of life


Guidance
 For recycling and disposal routes, the distances will vary, depending on each national context. Transport distances for different waste types may also vary according to the number of treatment sites. For example, hazardous waste may have the longest transport distance, owing to the limited number of sites, whereas inert waste may have the shortest. (http://www.sepa.org.uk/waste/waste_infrastructure_maps.aspx or http://www.landfill-site.com/html/how_many_landfills.php) National waste management plans or waste infrastructure maps may help in identifying the locations of waste management sites.Data may be currently available for transport of waste between the demolition site and sorting plant: e.g. for the French context see the report from [ADEME 2003]. For example, current practice in generic databases or EPD programmes may take into account:- between 10 and 30 km for inert and non-hazardous wastes, as well as for incineration with energy recovery;- around 100 km for hazardous wastes.

For recycled products sent to a recycling facility it is likely that the distance will be higher because, to date, the number of recycling facilities is still low, leading to higher distances than for landfill facilities. As an average value, 250 km for trucks can be assumed. This figure may be revised if more accurate data are available in a national context, and if the EoL transport is found to be significant in the final results.

 

C-07 Waste treatment vs recycling and recovery process

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Aspect C-07 Waste treatment vs recycling and recovery process
Description
 How should the waste treatment and recycling/reuse/energy recovery of building materials be accounted for (e.g. different recycling practices, economic feasibility)?

related study objective

 ☒ stand-alone LCA ☒ comparative assertion

related study phase

 ☒ ☐ ☐ ☐ ☐
goal and scope definition inventory analysis (LCI) impact assessment (LCIA) interpretation reporting

relevant for
new buildings existing buildings construction products screening LCA simplified LCA complete LCA
Provisions The provisions in EN 15804 should be referred to.Scenarios should then be developed, based on each national context. For example, for the French context [ADEME 2010] can be referred to for estimates of the amounts of sorted and recycled materials.This aspect is likely to be predefined in every national EPD programme, and may be adopted within a given LCA study.
Rules from:

EN 15804

 

 6.3.4.6 End-of-life stage
6.3.8 Developing product scenarios
7.3 Scenarios and additional technical information
7.3.4 End of life
Guidance
 Module C3 provides information on waste treatment processes until the product reaches the end-of-waste state or is disposed of (included in C4). In theory, processes before the end-of-waste state is reached are waste treatment processes, and processes after the end-of-waste state is reached are recycling or recovery processes. When deciding whether a process should be included in C3 or be considered as a recycling process within Module D. the focus should be less on the terminology for the process and more on whether the waste has reached the end-of-waste state. The default scenario for the end-of-life stage C3 should be based on current national practice for demolition material. However, alternative scenarios can be given, if a range of waste treatment options is available.National schemes may provide default scenarios and models for Module C3 for various materials, based on current practice.The end-of-waste state is defined in EN 15804 6.3.4.5. All waste treatment process impacts until the end-of-waste state are reached should be included in Module C3, excluding demolition (considered in C1) and transport to waste treatment or disposal (considered in C2).

The Loads and benefits of recycling, recovery and reuse beyond the system boundary are recorded in Module D.

Energy recovered by energy recovery processes, e.g. incineration with an efficiency greater than 60%, is recorded in Module D (as the recovery process impacts and avoided impacts of conventional generation), as the material must have reached the end-of-waste state to be considered for energy recovery (EN 15804 6.3.4.5 Note 2).

Recovery processes with efficiencies of less than 60% cannot be considered as energy recovery, and must be considered as waste management processes, e.g. as incineration (Module C4).

Incineration of demolition materials that have not reached the end-of-waste state must also be considered within Module C4, irrespective of the efficiency of incineration (EN 15804 6.3.4.5 Note 2). In both instances, benefits from these C3 processes beyond the system boundary can be recorded in Module D.

C-03 (Buildings) / C-08 (Products) LCA modelling of landfill/disposal

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Aspect C-03 (Buildings) / C-08 (Products) LCA modelling of landfill/disposal
Description
 Should general rules be defined regarding what is deposited and which LCA data to use? What is the timescale for modelling the fate of disposed material?

related study objective

 ☒ stand-alone LCA ☒ comparative assertion

related study phase

 ☒ ☐ ☐ ☐ ☐
goal and scope definition inventory analysis (LCI) impact assessment (LCIA) interpretation reporting

relevant for
new buildings existing buildings construction products screening LCA simplified LCA complete LCA
Provisions This aspect depends on the background database used. LCA practitioners need to adopt the procedures from the background database, and have no specific influence on it.The fate of materials should be based on current practice (as a baseline scenario), and not predicted practice in the future (except for sensitivity analysis purposes).
Rules from:

EN 15978

 8.7.5 Scenarios for disposal – Module C4

EN 15804

 6.3.4.6 End-of-life stage
6.3.7 Data quality requirements
6.3.8 Developing product scenarios
7.3 Scenarios and additional technical information
7.3.4 End-of-life
ILCD Provisions 7.4.4.2 Modelling waste treatment
I) SHALL – Waste and end-of-life product deposition
I.a) Model waste management completely
         I.b) Modelling discarding of goods into nature
I.c) Modelling waste as output“Note: the use of generic waste treatment models/processes may be considered to limit time and resources required for data collection.”
Guidance
 Within building or product LCA studies, the depositing of material in landfill or other disposal mechanisms is typically not a focus of the study, and is modelled with the use of generic data from background databases. These databases have their own modelling principles concerning the fate of landfilled material. The practitioner cannot influence this aspect, but should understand the way in which landfill processes have been modeled. In some databases, emissions that occur after 100 years are identified separately, and their effect can therefore be considered separately. Databases may also have specific assumptions about the decay rates of biogenic material in landfill and the composition and capture rates for landfill gas, which may not relate to practice in the various Member States, or to current understanding. The practitioner should ensure that this aspect is not neglected. For example, organic materials should not be handled as though they were inert, as this might yield significant errors in the estimation of the fate of deposited material. The practitioner should ensure that the treatment of landfill and incineration processes is considered consistently with the datasets for the production of biogenic material (this should be the case if data are sourced from the same database). Module C4 covers the disposal of end-of-life construction material arising from the demolition of the building. The disposal of end-of-life material arising from the use phase (Modules B2–B5) is included in the individual module where the waste arises.Current landfilling rates and other disposal processes should be used to develop the scenarios for Module C4.The choice of LCA data for landfilling should correspond, as a minimum, to the different types of wastes (inert, non-hazardous and hazardous), although more detailed landfill models are available in many databases. In addition, the time period over which inputs/outputs should be inventoried from the point of disposal in landfill is 100 years [EN 15804 6.3.7]. For biogenic materials, it is of particular relevance to take account of the fate of the biogenic carbon when landfilled, considering the decay rate, the mix of carbon dioxide and methane produced from decay, and the landfill gas capture rate of the landfill. National assumptions for various materials and landfills vary widely.The extent to which biogenic carbon decays into methane at end of life also needs to be considered in LCA studies, although there is little consensus on exactly how much methane will be generated or released in an average landfill. In any event, the greenhouse gases released from biomass degradation will not be balanced by an equivalent amount of sequestered CO2, owing to the increased GWP of methane emission. National EPD programmes may prescribe landfill models, or the percentage of material that will be placed in landfill at the end of life.

D-02 Reuse – water consumption

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Aspect D-02 Reuse – water consumption
Description
 There are different quality levels of water – freshwater, rainwater, greywater and waste water. Depending on these quality levels water, can be used for different applications (e.g. rainwater for washing clothes). How and under what circumstances is it possible to obtain benefits from the reuse of water?

related study objective

 ☒ stand-alone LCA ☒ comparative assertion

related study phase

 ☒ ☐ ☐ ☐ ☐
goal and scope definition inventory analysis (LCI) impact assessment (LCIA) interpretation reporting

relevant for
new buildings existing buildings construction products screening LCA simplified LCA complete LCA
Provisions Module D looks at the loads and benefits of the net output flow, if relevant and available. If water outputs or any output flow at EoL (not production waste) are reused, then to calculate the net output flow, any use of similar reused water or material as an input in Modules A1–C4 must be considered to calculate the net flow (output − input = net output flow).If there is a net output flow, then the impacts associated with any reuse processes after the ‘end-of-waste state’ can be included in Module D, together with a credit associated with the avoided production of the virgin product.
Rules from:

EN 15978

 7.4.6 Boundary for the benefits and loads beyond the system boundary (Module D)

EN 15804

 6.2.7 D Benefits and loads beyond the system boundary, information module

ILCD

 Not mentioned
Guidance

If any water from the building is reused outside the building, then the benefits of this use (credit for virgin water extraction and treatment, together with any impacts from the system boundary before substitutive use) are included in Module D.

If a waste material or waste energy is recycled, then the impacts associated with any processes after the ‘end-of-waste state’ before it can be used to substitute primary material can be included in Module D , together with a credit associated with the production of the virgin product it substitutes.

Back to 7 Aspects concerning Module D

D-03 Credits for recycling and energy recovery

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Aspect D-03 Credits for recycling and energy recovery
Description
 How should credits for recycling and energy recovery be allowed for?

related study objective

 ☒ stand-alone LCA ☒ comparative assertion

related study phase

 ☒ ☐ ☐ ☐ ☐
goal and scope definition inventory analysis (LCI) impact assessment (LCIA) interpretation reporting

relevant for
new buildings existing buildings construction products screening LCA simplified LCA complete LCA
Provisions Where recycled material or energy recovered at end of life are also used in the production of products (A1–A3), in Modules B1–B5 or C1–C4, then the net output flow is calculated as total output − total input.If there is a net output flow that provides benefits beyond the system boundary (as it produces material or energy that substitutes for virgin production), then the processes beyond the system boundary required to produce the recycled material or recovered energy substituted can be provided in Module D, together with a credit calculated by deducting the impact of producing the material or energy from virgin resources. For materials, this will be the virgin production route. For energy, this will be the use of the typical energy mix for heating (for heat energy) or the grid mix (for electrical energy), excluding secondary energy. In practice, unless energy from waste is a significant part of the energy or grid mix, the national mix can be used.
Rules from:

EN 15978

 7.4.6 Boundary for the benefits and loads beyond the system boundary (Module D)
8.8 Scenarios for benefits and loads beyond the system boundary – Module D

EN 15804

 6.2.7 D Benefits and loads beyond the system boundary, information module

ILCD

 Not mentioned
Guidance
 If the recycled product cannot substitute the primary product completely (e.g. it has 95% of the relevant functional equivalence), a justified value correction factor should be used to reflect this in the credit calculation.If waste is burned with less than 60% energy recovery, it has to be classified as a disposal process rather than a recovery process, and the process must be reported in Module C4. There may still be benefits for the production of energy beyond the system boundary that can be shown in Module D (as with landfilling and the recovery of gas from landfilling).

For example, if there was a net output flow of electricity, then the grid mix of electricity (excluding any secondary energy sources) should be used to credit the flow.

Note that the incineration of waste (i.e. material that is considered waste because it has not reached the end-of-waste state) may also be more efficient than 60%, but it must still be considered as a disposal process.

Back to 7 Aspects concerning Module D

B- 10. “Repair with screening LCA”

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Aspect B- 10. “Repair with screening LCA”
Description
 Repair module covers all corrective, responsive or reactive treatment of a construction product or construction works to return it to a condition in which it can perform its required functional and technical performance. It covers only the partial replacements of components and building parts (in case of failure), and should be distinguished from the replacement module that is related to the complete replacement of component and building parts.

related study objective

 ☒ stand-alone LCA ☒ comparative assertion

related study phase

 ☒ ☐ ☐ ☐ ☐
goal and scope definition inventory analysis (LCI) impact assessment (LCIA) interpretation reporting

relevant for
new buildings existing buildings construction products screening LCA simplified LCA complete LCA
Provisions Repair is optional in the context of screening LCA. For provision and guidance, please refer to the aspect “Repair with complete LCA” of the present document.The reparation procedure refers only to corrective, responsive or reactive actions in response to losses of performances of a building component or building part.Repair is distinguishable from maintenance and replacements by the following aspects [EN 15804]:

  • Maintenance is a planed (proactive) action that maintain components performances whereas Repair is a corrective (reactive) action in response to damage;
  • Replacement covers the complete replacement of a component whereas Repair covers only replacement of sub-components.

According to EN 15978, the boundary for repair should include:

  • the production of the repaired part of component and ancillary products;
  • the transportation of the repaired part of component and ancillary products, including production impacts
  • and aspects of any losses of materials during transportation;
  • the repair process of the repaired part of component and ancillary products;
  • waste management of the removed part of the component and of ancillary products;
  • the end of life stage of the removed part of the component and of ancillary products

However, in the context of screening LCA, only the production of the replaced component/repaired part may be included.
Rules from:
 EN 15978:7.4.4.1 General7.4.4.4 Boundary for repair (module B3)8.3 Time related characteristics

8.6.3 Scenarios for maintenance, repair, replacement

EN 15804:

6.3.3. Reference service life

6.3.4.4.2  – B3 Reparation

7.3.3.1 B1-B5 use stage related to the building fabric

Annex A
Guidance
 Repair is optional in the context of screening LCA and may be neglected in many cases. For provision and guidance, please refer to the aspect “Repair with complete LCA” of the present document.

Back to 5.4.  Module B3

B- 11. “Inclusion of energy and materials for repair”

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Aspect B- 11. “Inclusion of energy and materials for repair”
Description
 The inclusion of energy and water use, material use, etc. is framed by standards EN 15804 and EN 15978. The EeBGuide provides additional information and guidance on how (and when) to include or exclude a given aspect of the study.

related study objective

 ☒ stand-alone LCA ☒ comparative assertion

related study phase

 ☒ ☐ ☐ ☐ ☐
goal and scope definition inventory analysis (LCI) impact assessment (LCIA) interpretation reporting

relevant for
new buildings existing buildings construction products screening LCA simplified LCA complete LCA
Provisions According to EN 15978, the boundary for repair should include:

  • the production of the repaired part of component and ancillary products;
  • the transportation of the repaired part of component and ancillary products, including production impacts
  • and aspects of any losses of materials during transportation;
  • the repair process of the repaired part of component and ancillary products;
  • waste management of the removed part of the component and of ancillary products;
  • the end of life stage of the removed part of the component and of ancillary products

Water and energy usage related to the repair process should always be included.

However, Repair is considered optional. Please refer to the aspects “Repair with complete LCA”, “Repair with simplified LCA” and “Repair with screening LCA” for further details.
Rules from:
 EN 15978:7.4.4.1 General

7.4.4.4 Boundary for repair (module B3)

8.3 Time related characteristics

8.6.3 Scenarios for maintenance, repair, replacement

EN 15804:

6.3.3. Reference service life

6.3.4.4.2  – B3 Reparation

7.3.3.1 B1-B5 use stage related to the building fabric

Annex A
Guidance
 In the context of simplified and screening LCA, only the production of the replaced component/repaired part may be included.Please refer to the aspects “Repair with complete LCA”, “Repair with simplified LCA” and “Repair with screening LCA” for further details.

Back to 5.4.  Module B3

B- 17. “Inclusion of energy and materials for replacement”

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Aspect B- 17. “Inclusion of energy and materials for replacement”
Description
 The inclusion of energy and water use, material use, etc. is framed by standards EN 15804 and EN 15978. EEB guide provides additional information and guidance on how (and when) to include or exclude a given aspect of the study.

related study objective

 ☒ stand-alone LCA ☒ comparative assertion

related study phase

 ☒ ☐ ☐ ☐ ☐
goal and scope definition inventory analysis (LCI) impact assessment (LCIA) interpretation reporting

relevant for
new buildings existing buildings construction products screening LCA simplified LCA complete LCA
Provisions In the context of simplified LCA, the following items may be neglected upon justification:

  • Production, transportation, waste management, and end of life of ancillary products;
  • Energy and water usage related to the replacement process;
  • Losses of materials during storage, transportation or implementation (if not known).

In the context of screening LCA, only the production of the replaced component may be included.

Please refer to the aspects “Replacement with complete LCA”, “Replacement with simplified LCA” and “Replacement with screening LCA” for further details.
Rules from:
 EN 15978:7.4.4.1 General7.4.4.5 Boundary for replacement (module B4)8.3 Time related characteristics

8.6.3 Scenarios for maintenance, repair, replacement

EN 15804:

6.3.3. Reference service life

6.3.4.4.2  – B4 Replacement

7.3.3.1 B1-B5 use stage related to the building fabric
Guidance
 Please refer to the aspects “Replacement with complete LCA”, “Replacement with simplified LCA” and “Replacement with screening LCA” for further details.

Back to 5.5.  Module B4

B- 19. “Operational Energy exported and on-site produced and allocation of environmental impacts”

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Aspect B- 19. “Operational Energy exported and on-site produced and allocation of environmental impacts”In future, buildings will not only be energy- efficient, but also will produce energy on site in multiple ways.
Description
 The energy produced at the building site may not only be consumed in the building, but also exported to the grid. For such cases, calculation and allocation rules need to be defined.

related study objective

 ☒ stand-alone LCA ☒ comparative assertion

related study phase

 ☒ ☐ ☐ ☐ ☐
goal and scope definition inventory analysis (LCI) impact assessment (LCIA) interpretation reporting

relevant for
new buildings existing buildings construction products screening LCA simplified LCA complete LCA
Provisions Impacts have to be calculated with regards to EN 15978, in Annex B case studies of different energy related questions are provided.
Rules from:
 EN 15978:8.6.5 Scenarios for operational energy use – Module B6Annex B (informative) Exported energy – Case studiesCase 1 (Scenario for energy use, supply and import)

Case 2 (Scenario for energy use and export)

Case 3 (scenario for energy use, supply and export)

Case 4 (scenario for energy export)

EN 15804:

Not mentioned

ILCD:

Not mentioned
Guidance
 The case studies in Annex B of EN 15978 are helpful to identify the situation that applies to a concrete case study. From these case studies, the treatment of the situation may be extracted.

Back to 5.7.  Module B6