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Reconcile -> Age Check -> Flag -> Notify -> Sign Off

Hazardous Waste Manifest and Storage-Clock Agent

This agent keeps a running mass balance between what your plant generates and what leaves on manifests, so nothing sits unaccounted between the register and disposal. It runs a storage-age clock on every drum and flags the ones nearing the legal limit while there is still time to dispatch. It also watches your authorised quantity headroom so you know how much room is left before the permit ceiling.

The Problem

The drum hit day 89 and nobody was counting.

The generation register lives in one book, the manifests in another, and the storage yard in a third. Nobody reconciles them until the annual return, and that is when a 200 kg gap between generated and disposed shows up with no way to explain it. Meanwhile a drum of spent solvent has been sitting behind the shed since March, and the 90 day clock ran out last week. The inspector finds it before you do.

What Changes

Count the drums every day, not once a year.

The agent reconciles the generation register against the manifests and disposal dispatch records every day and flags any mass that does not balance. It runs an age clock on each drum and warns you at day 60 and day 75, well before the limit. It also reports how much of your authorised quantity is left so a busy month does not push you over the permit.

Humans stay in control: the agent flags aging drums and mass gaps, but your environment officer books the disposal, signs the manifest, and closes the annual return.

HOW THE AGENT WORKS

TRIGGERLLMAPIDECISIONACTIONWAIT
TRIGGERScheduled daily runFires each morning to start the reconciliation and age check.
APIFetch waste registerPulls generation records, drum ids, quantities, and start dates.
APIFetch manifests and dispatchPulls manifest records and disposal or co-processing dispatch data.
LLMReconcile mass balanceCompares generated versus disposed by waste code, computes drum age, and finds manifest gaps.
DECISIONMismatch or aging drum?
LLMDraft flag with headroomWrites a plain summary of gaps, aging drums, and remaining authorised quantity.
WAITHold for officer reviewPauses so the environment officer can read and act on the flag.
ACTIONSend flag to officerPosts the summary to the officer's email or Teams channel.
The agent does not sign the manifest or dispatch the waste. Your environment officer does. The agent removes the once-a-year scramble by keeping the count current.

HOW TO BUILD IT

Three levels of depth. Pick the one that matches where you are.

For the ops person who needs to understand what's involved and brief their team.

Waste Register & ManifestsWhere movements are logged
The AgentWorkflow engine + LLM
Environment OfficerReviews flags and signs

WHAT YOUR TEAM PROVIDES ONCE

  • Mass balance - generated versus disposed, reconciled daily
  • Storage clock - days each drum has been on site
  • Aging alerts - drums nearing the 90 day limit
  • Manifest gaps - movements logged with no matching manifest
  • Authorisation headroom - quantity left before the permit ceiling
What happens day-to-day: each morning the agent reads the register and the manifests, checks every drum's age, and lists what does not balance or is running late. Your officer opens the list, books disposal for the aging drums, and signs the manifests. Nothing leaves the plant until a person approves it.

For the IT person or technical lead who needs to scope the integration.

INQUIRY SOURCES

Waste generation register (spreadsheet or dedicated register app)
Manifest and disposal dispatch records
ERP authorisation limits and quantity ceilings

WORKFLOW ENGINE (N8N)

Daily scheduler starts the run
Pull register, manifests, and limits
Match waste codes and units across sources
Run the mass balance and the age clock
Explain each gap and rank by risk
Route only breaches and near-misses
Send the flag to the officer channel

CONNECTS TO

Waste register (Excel / Access / EHS platform like Cority / Enablon)Read: waste codes, quantities, dates. Write: none
Manifest records (state e-manifest / paper scan / EHS module)Read: manifest numbers, disposal dates, quantities. Write: reconciliation notes
ERP authorisation limits (SAP EHS / Oracle / spreadsheet)Read: authorised quantities, permit ceilings. Write: none
Notification channel (Email / Microsoft Teams / Slack)Read: none. Write: flag summaries and alerts
WITHOUT PMS API

Without API access, you export the register, manifests, and limits to CSV and drop them in a watched folder. The agent still reconciles and runs the age clock, but the export is manual and the picture is only as fresh as the last file.

WITH PMS API

With API access to the register and manifest system, the agent reconciles in near real time, catches a missing manifest the same day, and updates headroom as each dispatch clears. Best experience.

For the person who wants to build this agent step by step. Each node below maps to an n8n workflow node.

TRIGGERNode 1
Schedule Trigger - fires the daily run
Cron set to run daily at 06:00 plant time
Output: A run event carrying the current date
APINode 2
HTTP Request - pulls register, manifests, and limits
GET the register, manifest, and limit endpoints or read the watched CSV folder
Output: Raw records for waste generation, manifests, and authorised limits
APINode 3
Function - computes mass balance and drum age
Match waste codes, sum generated and disposed mass, compute each drum's age in days
Output: A structured object of balances, drum ages, and manifest gaps
LLMNode 4
LLM - explains gaps and reports headroom
Send the structured object to the model with the reconciliation prompt
Output: { mass_balance, aging_drums, manifest_gaps, headroom }
You are a hazardous waste compliance assistant. Given the generation register, the manifests, and the authorised limits below, reconcile generated versus disposed mass by waste code, list any drum whose storage age is over {age_threshold} days, list manifest gaps, and report authorisation headroom. Register: {register}. Manifests: {manifests}. Limits: {limits}. Respond ONLY with valid JSON. No explanation.
INPUT
{"age_threshold": 75, "register": [{"waste_code": "D001", "drum_id": "D-114", "kg": 200, "start_date": "2026-05-20"}], "manifests": [], "limits": {"D001_kg": 5000}}
OUTPUT
{"mass_balance": [{"waste_code": "D001", "generated_kg": 200, "disposed_kg": 0, "gap_kg": 200}], "aging_drums": [{"drum_id": "D-114", "waste_code": "D001", "age_days": 90, "limit_days": 90, "status": "at_limit"}], "manifest_gaps": [{"drum_id": "D-114", "issue": "no manifest for generated waste"}], "headroom": [{"waste_code": "D001", "authorised_kg": 5000, "used_kg": 200, "remaining_kg": 4800}]}
DECISIONNode 5
IF - routes only items that need attention
Pass when a gap, an aging drum, or low headroom is present
Output: A filtered set of flags for the officer
ACTIONNode 6
Send Message - posts the flag to the officer
Format the flags and post to the officer email or Teams channel
Output: A message in the officer channel
MVP vs Advanced — Where To Start
MVP — START HERE
  • Start with one waste stream and a single spreadsheet register
  • Compute the storage-age clock and flag drums over 75 days
  • Reconcile generated versus disposed from a hand-exported CSV
  • Send the daily flag to one email address
  • Have the officer confirm each flag before disposal is booked
  • Log every flag and sign-off in a simple sheet
ADVANCED — ADD LATER
  • =+ Connect the register and manifest system by API for same-day gaps
  • =+ Add authorisation headroom tracking across all waste codes
  • =+ Auto-draft the disposal request for officer approval
  • =+ Sync e-manifest status so closed manifests clear the clock
  • =+ Trend aging patterns to predict yard congestion
  • =+ Route flags by waste type to the right responsible person

Full Video Walkthrough Coming Soon

Watch the agent reconcile a week of waste movements and flag two drums nearing the storage limit.

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Frequently asked questions

Hazardous Waste Manifest and Storage-Clock Agent is an AI agent that tracks waste mass balance and drum storage age before a limit is breached.
The drum hit day 89 and nobody was counting. The Hazardous Waste Manifest and Storage-Clock Agent addresses this: tracks waste mass balance and drum storage age before a limit is breached.
No. Your team stays in control. The agent does not sign the manifest or dispatch the waste. Your environment officer does. The agent removes the once-a-year scramble by keeping the count current.

This is 3 of 4 agents in Environment & Effluent. → · Explore all 15 departments →