---
id: KB-IU-026
url: https://app.codecontract.io/help/manufacturing/declaring-what-left-the-plant
idioma: en
categoria: sector-industria
subcategoria: petroquimica
audiencia: usuario
nivel: avanzado
actualizado: 2026-08-13
tambienEn: [es]
relacionados: [KB-CN-035, KB-IU-013]
citadoPor: [KB-IU-027]
---

# Declaring what left the plant

_Once a year twelve months of scattered data must become a figure somebody signs. That somebody is you._

**Responde a:** annual declaration for an installation · gathering a year of data to declare · where the figures i declare come from · evidencing a declared figure years later

Periodically a declaration must be filed: what was consumed, emitted, managed, produced. **You generate none of that data** — the plant generates it, different equipment and systems collect it, and some of it comes from a third party. Your job is to gather it, reconcile it and sign a figure that from that moment is the official version of what happened.

## Where each number you sign comes from

| The figure | Who generates it | What backs it |
| --- | --- | --- |
| Own readings | Your equipment | The record, if retained |
| Analyses | A laboratory | Their report, with its date |
| Removals | An external contractor | **Their receipt, which can be late** |
| **Estimates** | **You** | **The basis, if it was written down** |

> [!IMPORTANT]
> **What must be defensible is not the declared figure: it is how it was reached.** A later review rarely disputes the number itself; it disputes where it came from, what was included, what was estimated and on what basis. If the calculation lives in a spreadsheet made by somebody who has left, with unexplained columns, the figure can be perfectly correct and still be indefensible.

## What turns the declaration into a formality

1. **Collect during the year, not at the end** — What is asked for in January is scattered across twelve months of places.
2. **Store the evidence beside the figure** — The report, the receipt and the reading, not just the number.
3. **Write down the basis for anything estimated** — At the time, while someone remembers why it was estimated that way.
4. **And keep the declaration with its evidence** — It is reviewed years later, not the following week.

> [!WARNING]
> What most delays this position is **the figure that depends on a third party**: the receipt the contractor has not sent, the missing analysis, the laboratory certificate. It gets chased in January, with the deadline looming, and arrives when it arrives. Asking for it during the year —as it is generated, not at the end— is the only way to stop the deadline depending on somebody else's diary.

> [!NOTE]
> What declarations are mandatory for your installation, what data they include, what calculation or estimation methods are acceptable and how long the supporting evidence must be kept **is determined by the applicable rules and your authorisation, and settled by your adviser or the competent body**. Here we cover the organisational part: how to gather the year during the year and be able to explain the figure afterwards.

**Do I only keep the filed declaration?**

Also what backs it. That is what gets reviewed later.

**How do I justify an estimate?**

By writing the basis when it is applied, not when it is questioned.

**What if a third party is late with their part?**

Which is why it pays to request it during the year, with automatic chasing.

## Ejemplos

**In January twelve months of scattered data must be gathered.**

- Collects and files each figure as it is generated

→ The declaration is prepared without an annual campaign.

**An external contractor's receipt is missing.**

- Requests and chases automatically through the year

→ Third-party data arrives before the deadline.

**A review asks where a figure came from.**

- Stores the evidence beside the declared figure

→ The number's origin can be shown.

**The calculation lives in a spreadsheet by someone who has left.**

- Keeps the written basis with the file

→ The figure stops depending on one person.

**A figure is estimated and nobody notes why.**

- Allows recording the basis at the moment

→ The estimate is explicable years later.

**The declaration is filed and no copy with its evidence is kept.**

- Keeps what was filed and what supported it

→ The later review has something to answer with.