Olf-Actions International

09/29/2026

Very particular set of skills ...

09/24/2026

𝗣𝗮𝘀𝘀𝗼 𝟭𝟬 | 𝗠𝗼𝗻𝗶𝘁𝗼𝗿𝗮𝗺𝗲𝗻𝘁𝗼 𝗱𝗲 𝗢𝗱𝗼𝗿𝗲𝘀

Uma reclamação sem dado é uma opinião. Com dado, é um fato.

Narizes eletrônicos, meteorologia e reconhecimento de padrões, em tempo real. Hora, fonte e vento para cada episódio.

24 anos desenvolvendo essa tecnologia.

Olf-Actions International Inc.

09/24/2026

𝗣𝗮𝘀𝘀𝗼 𝟳 | 𝗖𝗼𝗺𝘂𝗻𝗶𝗰𝗮çã𝗼 𝗱𝗲 𝗢𝗱𝗼𝗿𝗲𝘀

A medição encerra a dúvida. A comunicação encerra o conflito.

Audiências públicas, comitês de moradores, crises de vizinhança. Estamos ao lado de quem precisa explicar.

𝗣𝗿ó𝘅𝗶𝗺𝗼: 𝗚𝗼𝘃𝗲𝗿𝗻𝗮𝗻ç𝗮 𝗱𝗲 𝗢𝗱𝗼𝗿𝗲𝘀

Olf-Actions International Inc.

09/24/2026

𝗧𝗵𝗶𝘀 𝗶𝘀 𝘄𝗵𝗮𝘁 𝗰𝗹𝗲𝗮𝗻 𝗮𝗶𝗿 𝗹𝗼𝗼𝗸𝘀 𝗹𝗶𝗸𝗲.

Filmed on a working trip to Missouri, between two site visits.

Most people never think about the air around their home. That is exactly the point. You only notice it when it is taken from you, and then it takes everything with it: the open window, the meal on the porch, the neighbor you stop inviting over.

For 33 years we have done one thing. We measure odor in a certified laboratory, we model where it travels, and we give communities and operators the numbers that end the argument.

We sell no equipment. No sprays. No masking agents. Just measurement that holds up, in a boardroom or in front of a judge.

More than 10 million people have their air back. One community at a time.

𝗢𝗹𝗳-𝗔𝗰𝘁𝗶𝗼𝗻𝘀 𝗜𝗻𝘁𝗲𝗿𝗻𝗮𝘁𝗶𝗼𝗻𝗮𝗹 | Independent odor experts
Canada · United States · South America
olf-actions.com

09/14/2026

𝗦𝗶𝘅 𝘆𝗲𝗮𝗿𝘀 𝗮𝗴𝗼 𝘁𝗼𝗱𝗮𝘆.

14 September 2020. We published this piece on odor-free cannabis production.

At the time, the industry had other priorities. Licences, capital, yield, retail footprint. Odor was an afterthought, something you handled with a carbon filter and a hope.

Six years later, odor sits among the leading causes of permit denial, neighbour litigation and licence revocation across cannabis operations in the United States and Canada. We see it in our own file room every week.

We did not predict it. We simply came from industries where it had already happened: rendering, landfills, wastewater, pulp and paper. Cannabis was going to walk the same road, and it did.

𝗪𝗵𝗮𝘁 𝘀𝗲𝘃𝗲𝗻𝘁𝘆 𝗰𝗮𝗻𝗻𝗮𝗯𝗶𝘀 𝗺𝗮𝗻𝗱𝗮𝘁𝗲𝘀 𝘁𝗮𝘂𝗴𝗵𝘁 𝘂𝘀

"Odor-free" is a promise. A number is a defence. The facilities that survive a challenge are the ones that measured before anyone complained
Carbon filtration is not a strategy. It is one component, sized either from a dispersion study or from optimism
Fugitive emissions matter more than the stacks. Loading doors, drying rooms, trim rooms, waste handling
A complaint log without a measurement eventually becomes the plaintiff's exhibit
The operators who lose are rarely the worst emitters. They are the ones who arrive at the hearing with adjectives instead of data

𝗪𝗵𝗮𝘁 𝗵𝗮𝘀 𝗻𝗼𝘁 𝗰𝗵𝗮𝗻𝗴𝗲𝗱

The method. Olfactometry under EN 13725, the European reference standard for the determination of odor concentration. Atmospheric dispersion modeling with AERMOD. A property line figure, a percentile, a named sensitive receptor.

We sell no equipment and represent no supplier. We are expert witnesses and regulatory authors, and that independence is precisely why findings produced this way are accepted by both sides of a dispute.

More than seventy cannabis mandates in seven years, for the largest operators on the market: litigation, class actions, hearings before authorities, and the drafting of odor ordinances for counties and cities, under our GROW® program.

Same phone number as in 2020.

𝘈 𝘴𝘵𝘢𝘯𝘥𝘢𝘳𝘥 𝘯𝘰 𝘰𝘯𝘦 𝘤𝘢𝘯 𝘮𝘦𝘢𝘴𝘶𝘳𝘦 𝘪𝘴 𝘯𝘰𝘵 𝘢 𝘴𝘵𝘢𝘯𝘥𝘢𝘳𝘥. 𝘐𝘵 𝘪𝘴 𝘢 𝘱𝘳𝘰𝘮𝘪𝘴𝘦.

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

Yann H. Contratto, P.E., M.E. | Senior Legal Odor Expert | Dispersion Modeling Specialist | Olf-Actions International Inc. | [email protected] | +1 514 758 3974 | olf-actions.com/grow

09/09/2026

🇺🇸 𝗪𝗵𝘆 𝗢𝗱𝗼𝗿 𝗜𝘀 𝘁𝗵𝗲 𝗟𝗮𝘀𝘁 𝗡𝘂𝗶𝘀𝗮𝗻𝗰𝗲 𝗪𝗶𝘁𝗵𝗼𝘂𝘁 𝗮 𝗡𝘂𝗺𝗯𝗲𝗿 🇺🇸
Smoke got the Ringelmann chart. Noise got the decibel. Speed got the radar. Each became governable the day it became measurable.

𝘖𝘥𝘰𝘳 𝘪𝘴 𝘴𝘵𝘪𝘭𝘭 𝘣𝘦𝘪𝘯𝘨 𝘭𝘪𝘵𝘪𝘨𝘢𝘵𝘦𝘥 𝘪𝘯 𝘢𝘥𝘫𝘦𝘤𝘵𝘪𝘷𝘦𝘴.
In this new WORLD of ODORS® issue, I explain what happens to a city that never sets a threshold: the complaint file grows, nothing in it can be tested, and one day plaintiffs' counsel reads it as a class certification argument. After 130+ proceedings, the pattern is always the same: 𝘵𝘩𝘦 𝘤𝘪𝘵𝘺'𝘴 𝘰𝘸𝘯 𝘭𝘰𝘨 𝘣𝘦𝘤𝘰𝘮𝘦𝘴 𝘵𝘩𝘦 𝘱𝘭𝘢𝘪𝘯𝘵𝘪𝘧𝘧'𝘴 𝘦𝘹𝘩𝘪𝘣𝘪𝘵.
A workable odor ordinance needs only three honest elements:
▪️ 𝗔 𝘂𝗻𝗶𝘁 | OU/m³ by EN 13725 laboratory olfactometry, not a handheld field sniffer
▪️ 𝗔 𝗳𝗿𝗲𝗾𝘂𝗲𝗻𝗰𝘆 | a percentile, not a prohibition
▪️ 𝗔 𝗿𝗲𝗰𝗲𝗽𝘁𝗼𝗿 | the nearest sensitive receptor, not the emitter's fence line.

ZONE 8 Nose Letter :

Every American city governs things no one can see. It governs smoke.

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