Olf-Actions International

08/28/2026

𝗧𝗛𝗘 𝗦𝗘𝗖𝗧𝗢𝗥𝗦 𝗪𝗘 𝗦𝗘𝗥𝗩𝗘

Before they hire us, most people ask the same thing: 𝘸𝘩𝘰 𝘦𝘭𝘴𝘦 𝘩𝘢𝘷𝘦 𝘺𝘰𝘶 𝘸𝘰𝘳𝘬𝘦𝘥 𝘸𝘪𝘵𝘩?

Fair question. Also the one question we will never answer with names.
An odor file is almost never just a nuisance file. It sits next to a notice of violation, a permit renewal, a council hearing, or a class action. Confidentiality is not a courtesy in that setting. It is part of the work.

So here is what we can share. The shape of our portfolio, by sector, as of August 2026, reading the chart clockwise from the top:
🔵 Waste, landfill and composting | 24.9 %
🔵 Cannabis | 15.6 %
🔵 Municipal wastewater | 14.6 %
🔵 Agri-food and beverage | 10.2 %
🔵 Rendering and pet food | 10.2 %
🔵 Biogas, RNG and waste-to-energy | 5.4 %
🔵 Pulp and paper, chemical, asphalt and other industry | 19.0 %

Seven different industries. One recurring pattern.

Equipment gets purchased before anyone measures the odor. A drop in the complaint log gets presented as proof of compliance. Then a regulator, a neighbor's attorney, or a judge asks the only question that actually decides the file: 𝘤𝘢𝘯 𝘺𝘰𝘶 𝘥𝘦𝘮𝘰𝘯𝘴𝘵𝘳𝘢𝘵𝘦 𝘸𝘩𝘢𝘵 𝘤𝘳𝘰𝘴𝘴𝘦𝘴 𝘺𝘰𝘶𝘳 𝘱𝘳𝘰𝘱𝘦𝘳𝘵𝘺 𝘭𝘪𝘯𝘦, 𝘢𝘯𝘥 𝘱𝘳𝘰𝘷𝘦 𝘪𝘵?

A complaint count is a social indicator. It is not evidence. Nothing in a complaint log is defensible in court.

Thirty-three years. Twenty-eight countries. More than 5,000 odor impact studies, 130+ legal cases, 19 class actions won, 750+ cities served.

We are not a vendor and we sell no equipment. We measure, we model, we engineer, and we defend.

If your site is carrying an 𝗼𝗱𝗼𝗿 𝗰𝗼𝗺𝗽𝗹𝗮𝗶𝗻𝘁 or an 𝗶𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗮𝗹 𝗱𝗶𝘀𝗮𝗴𝗿𝗲𝗲𝗺𝗲𝗻𝘁 you cannot yet quantify, start with a measurement, not a proposal. Send me a direct message or reach the office below. First conversation costs nothing but the time it takes to describe the site.

𝗠𝗘𝗔𝗦𝗨𝗥𝗘 | 𝗠𝗢𝗗𝗘𝗟 | 𝗘𝗡𝗚𝗜𝗡𝗘𝗘𝗥 | 𝗗𝗘𝗙𝗘𝗡𝗗

Yann H. Contratto P.E., M.E. | Senior Odor Expert | Expert Witness
Olf-Actions International Inc. | [email protected] | +1 514 758 3974 | www.olf-actions.com

Nose-Letter WORLD of ODORS® : https://www.linkedin.com/build-relation/newsletter-follow?entityUrn=7070020113160122368

08/19/2026

𝗔 𝗧𝗿𝘂𝗲 𝗗𝗮𝘆 𝗶𝗻 𝗣𝗮𝗿𝗮𝗱𝗶𝘀𝗲 🌡️

Today, August 18, 2026: process air sampling at 𝟳𝟱 °𝗖, 𝟵𝟴% 𝗿𝗲𝗹𝗮𝘁𝗶𝘃𝗲 𝗵𝘂𝗺𝗶𝗱𝗶𝘁𝘆, and powerful animal protein odors.
Some call it a tough day in the field. We call it 𝘴𝘰𝘶𝘳𝘤𝘦 𝘵𝘳𝘶𝘵𝘩: the only place where an odor file begins, at the stack, in the heat, EN13725 in hand.
And a few weeks from now? Tens of thousands more people who will no longer have to complain about these emissions.
𝗦𝗼𝗺𝗲𝘁𝗵𝗶𝗻𝗴 𝘁𝗼 𝗯𝗲 seriously 𝗽𝗿𝗼𝘂𝗱 𝗼𝗳.

33 years | 5,000+ odor projects | 130 legal cases, won 130/130 | 19 class actions, won 19/19
🌐 www.Olf-Actions.com/legal

| LEGAL | TECHNICAL | SCIENTIFIC | ENGINEERING | ODOR | EXPERTS |

08/13/2026

08/08/2026

𝑶𝒅𝒐𝒓 𝑰𝒔 𝑵𝒐𝒕 𝑺𝒐𝒍𝒗𝒆𝒅 𝒃𝒚 𝑬𝒒𝒖𝒊𝒑𝒎𝒆𝒏𝒕. 𝑰𝒕 𝑰𝒔 𝑺𝒐𝒍𝒗𝒆𝒅 𝒃𝒚 𝑺𝒆𝒒𝒖𝒆𝒏𝒄𝒆.

Every plant manager facing odor complaints has been offered the same thing: a scrubber quote, a misting contract, a chemical program or worst, a false neutralizing agent. Most have bought at least one. Many are still receiving complaints.

Here is why. Treatment sold before diagnosis is treatment sized for a source that may not be your dominant emitter. We see it constantly: six figures spent on the stack that smells worst to a human standing beside it, while the actual driver of neighborhood impact was a roof exhaust nobody sampled.

Odor problems are solved by sequence: audit, sampling, analysis, impact modeling, engineering | then, if conflict has already erupted, committees, litigation science, and legal support. One method, borrowed from medicine, refined over 33 years and 5,000+ projects across three continents.

We are publishing the full sequence today, ten slides, in order. Read them and you will understand what no vendor will explain:
1 | why your operators' knowledge is the true starting point of every study
2 | why a sample that misrepresents its source will betray you years later
3 | why sources must be ranked by emission rate, not by how bad they smell
4 | why a dispersion map is the only honest answer to a neighbor's complaint
5 | why treatment must be sized after the diagnosis, never sold before it
6 | why a community that understands your data stops fighting your permit
7 | why an audit costs a fraction of what a class action discovers
8 | why science and law must be spoken by the same team, fluently.

We sell no equipment. Seventy treatment processes commissioned worldwide, none of them ours to sell, all of them sized from measured data. More than Ten million people have recovered their olfactory quality of life through this method.

This series teaches you each step, in order, so you understand exactly what your facility needs | and what it can finally stop fearing.

Yann H. Contratto P.E., M.E. 🇺🇸🇨🇦 | Expert Witness 🇺🇸
Founder & CEO | 𝑶𝒍𝒇-𝑨𝒄𝒕𝒊𝒐𝒏𝒔 𝑰𝒏𝒕𝒆𝒓𝒏𝒂𝒕𝒊𝒐𝒏𝒂𝒍 𝑰𝒏𝒄. | © 2026
| 𝑳𝑬𝑮𝑨𝑳 | 𝑻𝑬𝑪𝑯𝑵𝑰𝑪𝑨𝑳 | 𝑺𝑪𝑰𝑬𝑵𝑻𝑰𝑭𝑰𝑪 | 𝑬𝑵𝑮𝑰𝑵𝑬𝑬𝑹𝑰𝑵𝑮 | 𝑶𝑫𝑶𝑹 𝑬𝑿𝑷𝑬𝑹𝑻𝑺 |
| www.Olf-Actions.com/legal | [email protected] | +1 514 758 3974 |

08/03/2026

| PRELIMINARY ODOR AUDIT |
𝑬𝑽𝑬𝑹𝒀 𝑶𝑫𝑶𝑹 𝑳𝑨𝑾𝑺𝑼𝑰𝑻 𝑩𝑬𝑮𝑨𝑵 𝑨𝑺 𝑨 𝑾𝑨𝑹𝑵𝑰𝑵𝑮 𝑵𝑶𝑩𝑶𝑫𝒀 𝑴𝑬𝑨𝑺𝑼𝑹𝑬𝑫
Odor files rarely explode overnight. They accumulate: a handful of complaints, a first inspection, a petition, then a filing. At every one of those stages the problem was still yours to solve, quietly and at a fraction of the eventual cost. What was missing was measurement early enough to act on. A Preliminary Odor Audit maps your emission sources, ranks them by real impact and identifies which units drive the complaints, before a regulator or a plaintiffs' firm does it for you.

Across 33 years and close to 5,000 assessed sites, my team and I have seen the same pattern on every continent: the operators who called early kept control of their file, their budget and their relationship with their neighbors. The audit is deliberately scoped and fast, so the decision to act comes with numbers attached.

Yann H. Contratto, P.E., M.E. | Expert Witness 🇺🇸
Founder & CEO | 𝑶𝒍𝒇-𝑨𝒄𝒕𝒊𝒐𝒏𝒔 𝑰𝒏𝒕𝒆𝒓𝒏𝒂𝒕𝒊𝒐𝒏𝒂𝒍 𝑰𝒏𝒄. | © 2026
| 𝑳𝑬𝑮𝑨𝑳 | 𝑻𝑬𝑪𝑯𝑵𝑰𝑪𝑨𝑳 | 𝑺𝑪𝑰𝑬𝑵𝑻𝑰𝑭𝑰𝑪 | 𝑬𝑵𝑮𝑰𝑵𝑬𝑬𝑹𝑰𝑵𝑮 | 𝑶𝑫𝑶𝑹 𝑬𝑿𝑷𝑬𝑹𝑻𝑺 |
| www.Olf-Actions.com/legal | [email protected] | +1 514 758 3974 |

07/29/2026

𝑶𝑫𝑶𝑹 𝑰𝑺 𝑵𝑶𝑾 𝑻𝑯𝑬 #𝟏 𝑬𝑵𝑽𝑰𝑹𝑶𝑵𝑴𝑬𝑵𝑻𝑨𝑳 𝑪𝑶𝑴𝑷𝑳𝑨𝑰𝑵𝑻 𝑰𝑵 𝑵𝑶𝑹𝑻𝑯 𝑨𝑴𝑬𝑹𝑰𝑪𝑨

Odor has quietly become the leading environmental complaint in North America, and it is now the fastest path from a quiet neighbor to a class action. Olf-Actions International exists for one reason, to resolve that risk at its source. We are the independent LEGAL, TECHNICAL, SCIENTIFIC and ENGINEERING team built entirely around odor, combining EN13725 olfactometry, AERMOD dispersion modeling and courtroom grade documentation into a single defensible strategy. Most of our clients never reach a courtroom, because we reach the problem first. For the rare case that escalates, our record speaks plainly, 19 class actions and 19 won. Whatever study you already have in motion, we strengthen it as an independent layer rather than replacing it.

Yann H. Contratto, P.E., M.E. | Expert Witness 🇺🇸
Founder & CEO | 𝑶𝒍𝒇-𝑨𝒄𝒕𝒊𝒐𝒏𝒔 𝑰𝒏𝒕𝒆𝒓𝒏𝒂𝒕𝒊𝒐𝒏𝒂𝒍 𝑰𝒏𝒄. | © 2006
| 𝑳𝑬𝑮𝑨𝑳 | 𝑻𝑬𝑪𝑯𝑵𝑰𝑪𝑨𝑳 | 𝑺𝑪𝑰𝑬𝑵𝑻𝑰𝑭𝑰𝑪 | 𝑬𝑵𝑮𝑰𝑵𝑬𝑬𝑹𝑰𝑵𝑮 | 𝑶𝑫𝑶𝑹 𝑬𝑿𝑷𝑬𝑹𝑻𝑺 | | www.Olf-Actions.com/legal | [email protected] | +1 514 758 3974 |

07/28/2026

PREVENT IT. OR WIN IT.

07/23/2026

𝙊̲𝙇̲𝙁̲ ̲𝘼̲𝘾̲𝙏̲𝙄̲𝙊̲𝙉̲𝙎̲ ̲𝙄̲𝙉̲𝙏̲𝙀̲𝙍̲𝙉̲𝘼̲𝙏̲𝙄̲𝙊̲𝙉̲𝘼̲𝙇̲ ̲|̲ ̲𝙒̲𝙃̲𝙀̲𝙉̲ ̲𝘼̲ ̲𝙈̲𝙐̲𝙉̲𝙄̲𝘾̲𝙄̲𝙋̲𝘼̲𝙇̲ ̲𝙋̲𝙇̲𝘼̲𝙉̲𝙏̲ ̲𝘽̲𝙀̲𝘾̲𝙊̲𝙈̲𝙀̲𝙎̲ ̲𝘼̲ ̲𝙋̲𝙐̲𝘽̲𝙇̲𝙄̲𝘾̲ ̲𝙊̲𝘿̲𝙊̲𝙍̲ ̲𝘾̲𝘼̲𝙎̲𝙀̲

Recurring odor complaints at a treatment plant rarely stay technical. They become public hearings, regulatory files and class actions. Our team resolves them at every level: EN13725 olfactometry, AERMOD modeling, source ranking, engineering that performs, and a legal defense that holds. One firm, the full chain.



Yann H. Contratto, P.E., M.E. | Expert Witness 🇺🇸
Founder & CEO | Olf-Actions International Inc.
LEGAL | TECHNICAL | SCIENTIFIC | ENGINEERING | ODOR EXPERTS
COMRS | www.Olf-Actions.com/comrs | [email protected] | +1 514 758 3974

07/21/2026

𝙁𝘼𝘾𝙄𝙉𝙂 𝘼𝙉 𝙊𝘿𝙊𝙍-𝙍𝙀𝙇𝘼𝙏𝙀𝘿 𝘾𝙇𝘼𝙎𝙎 𝘼𝘾𝙏𝙄𝙊𝙉?
𝙊𝘿𝙊𝙍 𝘾𝙇𝘼𝙎𝙎 𝘼𝘾𝙏𝙄𝙊𝙉𝙎 𝘼𝙍𝙀 𝙎𝙐𝙍𝙂𝙄𝙉𝙂

Since 2020, odor-related class actions have accelerated from 300% a year to more than 700% in the first half of 2026 alone. When complaints turn to litigation, the operator carries the exposure. Our team stands with the companies and municipalities facing it, through ISOMP®: certified olfactometry, dispersion modeling, source ranking, and engineering guidance. No hype. No masking. Rigor that holds up before regulators and courts.

Yann H. Contratto, P.E., M.E. Expert Witness 🇺🇸,
Founder & CEO, Olf-Actions International
© Olf-Actions International Inc. 2026
| LEGAL | TECHNICAL | SCIENTIFIC | ENGINEERING | ODOR EXPERTS |
| www.Olf-Actions.com/legal | [email protected] | +1 514 758 3974 |

𝘽𝙐𝙄𝙇𝘿 𝘼 𝘿𝙀𝙁𝙀𝙉𝙎𝙄𝘽𝙇𝙀 𝙇𝙄𝙏𝙄𝙂𝘼𝙏𝙄𝙊𝙉-𝙍𝙀𝘼𝘿𝙔 𝘾𝘼𝙎𝙀