[CSName]

Chestnut Heath (Emission Assessment and Mitigation Study)

National Case Study[LAName] – 08 Jul 2016


[CSHeadline]

This worked example has been developed by the Low Emission Partnership. It illustrates the form and content of an Emissions and Mitigation Statement, which is underpinned by a more detailed Emissions and Mitigation Assessment (see attached), undertaken with reference to the Partnership's assessment guidelines (EMA-TG 2.0). The aim is to assess the transport emission impacts of the development, propose corresponding mitigation and demonstrate that the latter is balanced and proportionate. This example is based upon a real development site, albeit with adjustments and inventions for the purpose of the example (see notes below for details). It does not include a treatment of mitigation costs.

 

Chestnut Heath is a mixed used development of up to 38,000 sqm of laboratory, offices and light manufacturing floorspace (B1), located in a rural area. This study identifies and describes key features of the development, estimates traffic generated by the site and the nature, scale and impact of associated emissions. It then proposes mitigation to reduce these impacts and estimates associated costs and benefits of action.

A package of on-site mitigation is proposed, which combines visitor and staff travel plans with a Low Emission Car Club, in combination with a financial contribution for further compensatory measures. The report concludes that these proposals represent a balanced and proportionate level of mitigation, not least achieving a 76% total mitigation credit, including 13% assured on-site benefits.

Scope

[CSScope]

BASE DESIGN

Site location is appropriate for the development and good environmental design principles have been applied. Of note, the proposal includes provision of pedestrian facilities and electric vehicle charging infra-structure. No supplementary design credit is proposed; however this could be revisited should the option of funding the existing bus route be pursued.

Harm  

[CSHarm]

The base fleet calculation estimates total traffic at 66,500,000 km/y, with associated  emissions of 97t NOx and 8t PM10 over the 5 yr impact/benefit period. This represents a combined damage of £795,000 over 5 years. The largest contributors are cars (business - destination), accounting for 59% of emissions and damage costs.

[ITTypography] [IQValue] [IUTypography] [IQMethod]
  • Indicator Value Measure / Method Quality Assurance
  • Costs 795,000 £/5yr AQ damage costs (5yr) / EMA-TG 2.0, using Defra Damage Costs (Sep-15), assuming 'Rural’ location, and using the central value
  • PM10 8 t/5yr PM10 emissions (5yr) / EMA-TG 2.0, using EFT (v6.0.2), assuming 'rural' roads and 48kph
  • NOx 97 t/5yr NOX emissions (5yr) / EMA-TG 2.0, using EFT (v6.0.2), assuming 'rural' roads and 48kph

Action

A package of on-site mitigation is proposed, which combines visitor and staff travel plans with an on-site fleet management plan.

Benefit  

Estimated benefits from these measures correspond to a 13% reduction in NOx, 10% reduction in PM and 13% (£102,000) reduction in overall damage across the benefit period (5 years). An additional financial contribution of £500,000 is proposed towards supplementary emission reduction measures. Combining the latter with the on-site mitigation benefits (£102,000) indicates a total mitigation credit of £602,000 (no design credit was applied). This corresponds to 76% of base fleet impacts.

[ITTypography] [BQValue] [BUTypography] [BQMethod]
  • Indicator Value Measure / Method Quality Assurance
  • Costs 15,158 £/5yr PM10 damage costs avoided (5yr) / 
  • Costs 86,723 £/5yr NOX damage costs avoided (5yr) / 

Appraisal

A transport emissions mitigation implementation plan will be prepared to the approval of the LPA prior to commencing work on-site.  Associated measures will be put in place prior to first occupation/use. Progress will be monitored against the plan throughout the benefit period (5 years) with annual progress reports made to the LPA.

Action details

Action: Action #1 - Visitor Travel Plan [ACName]  

Action Definition: Travel plan incl. sustainable transport, applies to all visitor car trips [ACDescription]

[ACBenefit] Action Mechanism: 10% reduction in visitor car trips

  • [ITTypography] [BQValue] [IUTypography] [BQMethod] [BQDescription]
  • Indicator Value Measure / Method Quality Assurance
  • Costs 8,850 £/5yr PM10 damage costs avoided (5yr) /
  • Costs 37,923 £/5yr NOX damage costs avoided (5yr) /

Action: Action #2 - Staff Travel Plan [ACName]  

Action Definition: Travel plan incl. sustainable transport, applies to all staff car trips [ACDescription]

[ACBenefit] Action Mechanism: 10% reduction in staff car trips

  • [ITTypography] [BQValue] [IUTypography] [BQMethod] [BQDescription]
  • Indicator Value Measure / Method Quality Assurance
  • Costs 5,577 £/5yr PM10 damage costs avoided (5yr) /
  • Costs 23,899 £/5yr NOX damage costs avoided (5yr) /

Action: Action #3 - On site fleet management [ACName]  

Action Definition: Introduce all electric car and van business fleets [ACDescription]

[ACBenefit] Action Mechanism: 100% reduction in exhaust emissions from business fleets (NOX and PM10 exhaust). NB No impact on PM10 non-exhaust (brake, tyre wear, abrasion)

  • [ITTypography] [BQValue] [IUTypography] [BQMethod] [BQDescription]
  • Indicator Value Measure / Method Quality Assurance
  • Costs 731 £/5yr PM10 damage costs avoided (5yr) /
  • Costs 24,901 £/5yr NOX damage costs avoided (5yr) /


Status

Worked example


Main Actor

  • Low Emission Partnership

Basic details

  • Local authority: National Case Study [Other]

  • Location: Local Authority C (Rural) [Region: National]

Created

  • 08 Jul 16 – Updated 08 Jul 16

Action Type

  • Travel Plan
  • Green Fleet/ Low Emission Vehicle Investment

Documents