Mandatory Audit Trigger for a Multi-Site Food Processor
A dairy processor operates three sites in Bulgaria. Site A (Pazardzhik) has 2023 electricity consumption of 4.8 GWh and natural gas of 11.2 GWh; Site B (Plovdiv) uses 2.1 GWh electricity and 3.4 GWh gas; Site C (a cold store) uses 1.6 GWh electricity only. The company is a large enterprise (280 staff, turnover EUR 62 million). Its last energy audit was completed in March 2019 and covered only Site A. Management now wants a single 'group audit' covering all three sites and asks whether it can wait until 2026 to align with the next cycle. The consultant must decide the legal trigger, scope, and timing, and how to treat the cold store, which is leased and separately metered.
1. Determine whether an energy audit is currently mandatory, which sites must be covered, and by when.
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Trigger. As a large enterprise, the company falls under the mandatory audit obligation in the Bulgarian Energy Efficiency Act (ЗЕЕ), transposing EED Article 8. The obligation attaches to the enterprise, not to individual sites, so consumption must be aggregated.
Aggregation. Total final energy across sites: Site A 4.8 + 11.2 = 16.0 GWh; Site B 2.1 + 3.4 = 5.5 GWh; Site C 1.6 GWh. Total = 23.1 GWh, far above any exemption threshold for SMEs. No exemption applies.
Timing. The 2019 audit is more than four years old (March 2019 → March 2023), so the enterprise is out of compliance now. It cannot wait until 2026. An audit must be commissioned and completed promptly, and the four-year clock restarts from the new completion date, not from a calendar cycle.
Scope. A group audit is acceptable in principle, but it must cover all significant energy consumption of the enterprise. Site A alone is insufficient. Sites B and C must be included, or the enterprise must justify exclusion using measured data showing a site is not significant - which is not the case here, since B and C together are ~7.1 GWh.
Leased cold store. Site C is leased but the enterprise is the energy consumer and pays the bills; it is within the enterprise boundary and must be audited. The consultant should confirm the lease does not transfer the audit duty to the landlord and should obtain the metered data from the tenant's supplier.
2. The client proposes using a certified energy management system (EnMS) to substitute for the audit. What conditions must be satisfied, and what would you advise?
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Legal basis. Under EED Article 8(6) as transposed in ЗЕЕ, an enterprise with a certified EnMS (ISO 50001) covering all its energy consumption may be exempt from the audit obligation, provided the EnMS includes an energy audit function meeting Annex VI requirements.
Conditions to verify:
- The certificate must be current and cover all three sites, not just Site A. A scope limited to one site does not exempt the enterprise.
- The EnMS must include an energy audit function - i.e., a documented methodology for detailed analysis of energy consumption profiles, identification of efficiency measures, and baseline data - not merely monitoring and targeting.
- The certification body must be accredited.
- The EnMS must produce an action plan with measures and expected savings.
Advice. If the client's ISO 50001 certificate excludes Sites B and C or lacks an audit function, the exemption fails and a compliant audit is still required. I would recommend extending the EnMS scope and confirming the audit function with the certification body before relying on the exemption; otherwise, commission the audit now to close the non-compliance. I would document the analysis in writing so the client understands the residual legal risk.