Record site observations with their location, timing and limits

Write down what was actually visible from the authorised position, when it was seen and which parts of the site were not examined. Keep the observation separate from the host's explanation and from any technical conclusion that still needs evidence. A site note is most useful when another reviewer can understand its precise limits.

This guide is for business teams bringing permitted site observations into an ESG document review. It is not a technical inspection protocol, environmental sampling method, safety certification or substitute for a qualified site assessment.

Agree the purpose and access before the visit

Identify the questions the visit may help answer, the areas and operating conditions relevant to them, the host and the permitted activities. Establish whether photography, recording or access to documents is authorised. Follow the site's access and safety arrangements and stay within the visitors' competence.

Do not open containers, operate equipment, take samples or enter restricted areas merely to complete a note. If a potentially urgent hazard is apparent, follow the site's appropriate immediate reporting or emergency route; gathering a photograph should not take priority over safety.

The OECD guidance describes different assessment methods as suited to different risks, including on-site inspections in relevant circumstances. It does not make a short visual visit equivalent to every specialist assessment. OECD Due Diligence Guidance, question 25, printed pages 66–67

Record the observation and its boundary together

• Observation ID, date and local time, observer and purpose.

• Site, area, viewing position and relevant operating conditions.

• What was directly visible or otherwise examined, using neutral description.

• The host's explanation, attributed separately.

• Permitted photograph or document references, with their dates.

• Unvisited areas, obscured views, unavailable records and other limitations.

• The follow-up question, responsible owner and need for specialist input.

Describe the source of a number. A count of visible objects is different from an estimate of a site's total inventory. A reading copied from an instrument is different from checking its calibration, location, method and suitability. Avoid adding precision that the visit did not establish.

A fictional container observation

At 10:15 local time on 18 September 2026, a visitor at fictional Site S1 views Area A from an agreed walkway. Five containers are visible. The labels on two cannot be read from that position. Area B is seen only from a doorway, and Area C is not entered.

A useful note states: “From the agreed walkway in Area A, five containers were visible; the labels on two were not readable from that position. Their contents and classification were not checked. Area B was viewed only from the doorway, and Area C was not examined.”

The host says the containers hold cleaning materials. Record that as the host's account. It is not an independently established description of their contents. The note cannot support “two unlabelled hazardous-waste containers” or “the site's chemical storage is compliant”. Neither classification, the full label condition nor site-wide compliance was assessed.

The follow-up can request the responsible team's explanation, the relevant inventory and identification records, and an appropriate review of the issue. Let suitable specialists determine any technical or regulatory assessment needed. The visitor should not handle the containers to resolve uncertainty.

All details are fictional. Five visible containers are not a representative sample of every area, shift or operating condition. The two unreadable labels should not become a site-wide defect percentage.

Preserve the difference between then and now

Suppose the host later provides a photograph dated 20 September showing readable labels on the five identified containers. Link it as later evidence, recording what identification checks were possible. It may help describe the later condition; it does not change what was visible from the walkway on 18 September or prove what happened between the two dates.

If the original note contained a factual error, correct it through a dated revision that explains the basis. If conditions changed, preserve both states. A later photograph, a completed action and a sustained improvement are different claims requiring different evidence.

Fictional Site S1: on 18 September 2026 at 10:15 local, five containers were visible from Area A’s walkway and two labels unreadable there; Area B was doorway-only and Area C unvisited. The host said “cleaning materials”; contents and classification were unchecked. A 20 September photo shows readable labels on the five identified containers. It is later evidence, leaving the original viewing record intact.

Make images usable without exposing unnecessary information

Use images only where authorised and relevant to the review. Keep the original capture and its reference within the agreed access arrangements. Record cropping, annotation or redaction in any working copy so it does not obscure context or appear to be an untouched source.

Avoid unnecessary faces, identity documents, vehicle details, screens and commercially restricted information. Where an image cannot appropriately be shared, agree a controlled viewing route or a precise written description. Do not move private site images into a public report merely because they help explain a finding.

Check what the visit can support

Before drafting a conclusion, ask whether the relevant area and operating condition were actually observed, whether the evidence addresses the review question, and what corroboration remains necessary. Record if a machine was idle, an area inaccessible or the relevant shift absent. The absence of an observed problem during a short visit does not establish that none exists.

Keep unvisited locations visible in the scope statement and assign follow-up where they matter to the decision. A host's explanation can guide further work without extending the observer's firsthand knowledge.

Connect the notes with an agreed review

Nitium's ESG due diligence support includes document review, an evidence-based risk and gap register, follow-up questions and next steps. Discuss your review about how existing, authorised observation notes can inform that work. Specialist site-condition assessments, engineering conclusions, legal opinions and independent assurance require separately scoped professionals.

The first-review ESG due-diligence checklist helps define the wider decision and review limits. Sources checked 10 October 2026. No site-inspection service or technical clearance is implied by this guide.