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Committee Blog: Everything You Wanted to Know About Cannabis Facilities But Were Afraid to Ask Field Guide – Part 2 – Extraction Facilities

by members of NCIA’s Facilities Design Committee
Jacques Santucci, Brian Anderson, David Vaillencourt, and David Dixon

Continuing our five-part series on the behind-the-scenes workings of the legal cannabis industry. This series focuses on all of the inner dealings and industry advice from established professionals to craft this unlimited How-to-Guide to assist you in setting up your own facility. These articles cover cultivation, extraction, infused products, and retail facilities as well as support activities. In general, remember to be compliant with all local rules and regulations and contact a licensed contractor and industry expert. 

Part Two, Extraction: Top Things to Consider When Planning Your Cannabis Extraction Operation

The extraction environment is akin to an industrial process and should be approached away from a safety and chemical handling standpoint. Here are some general considerations as you begin to plan your extraction operation that we often see assumed or overlooked resulting in major unanticipated barriers that significantly impact decision costs and timelines. Always remember to be compliant with all local rules and regulations. 

Interior Building Materials

The walls and floors should be designed to be easily cleanable. In areas with solvent use, should have floors and walls made with the material, and ultimately the method for effective and ease of cleaning such FRP (Fiberglas Reinforced Panels).

Facility Specifications

There are many established standards from organizations like the NFPA and ICC-IFC which are commonly cited and required by Fire Marshalls with appropriate fire engineering controls, room interlocks, etc. Knowing which classifications are required based on the room type has a major impact on facility specifications (e.g. C1D1, C1D2, etc.) and the ultimate design. This requires knowing which solvents you will be using (and equally important, solvents you will not be using) as well as identifying all of the activities you will be doing in your extraction/processing facility (winterization, purification, bulk or final product packaging, and more) and whether the rooms will be wet and dry (how will you be cleaning these rooms?). How you answer those questions will help you and your team select the appropriate room materials and overall design. 

Electrical Power Ideal Recommendations

Evaluate your utility power infrastructure, including street transformers and available power to your site when designing your facility. The power demand for a cannabis facility is significant and grid limitations can destroy or significantly delay the ability for a business to operate.

Losing power due to weather or events outside of your control are another major risk. When considering alternative power generation, consider a generator with auto-transfer switching and the appropriate fuel type, depending on location and local weather. Contact a local licensed professional. A generator can be an invaluable insurance policy as even a short duration power outage can destroy an entire crop and any products that must be maintained at critical temperatures. 

Equipment Rooms and Maintenance Rooms

Appropriate space for equipment and dedicated rooms for maintenance is commonly needed. These all come with different combustion air requirements, venting requirements, air exchange rates, vacuum lines, and more. You may consider a room for spare parts and tools.

Appropriate Storage Area: Biomass, Volatiles, Raw Ingredients, and More

Separation of raw materials with appropriate and dedicated storage areas is needed for the various types of raw ingredients and materials utilized within a cannabis facility. Volatile solvents require extremely specific storage requirements, which will become part of your Chemical Hygiene Plan once you are operational. Refer to your local Fire Marshall for code considerations and from code organizations like the ICC and NFPA.

Cleaning and sanitation agents should be segregated from materials that are utilized in final product formulations (e.i food ingredients, oils, etc.) and raw materials ahead of the design is critical to ensure appropriate storage requirements are met whether indoor or outdoor. Biomass storage can vary based on whether wet or dry and often require controlled temperature and humidity. Finally, do not forget the dedicated space needed for finished good inventory. 

Electrostatic Discharge (ESD) Safety

Do you know that shock you get when you are in your car in the winter or flipping on a light switch? Innocent in everyday life, but potentially lethal in an environment such as extraction rooms where highly flammable solvents could be present. Consider rated and non-rated clothing and other personal protection measures. 

Food Grade Oil Considerations and Inspections

Extracted oils that will be used downstream in edibles and beverages are akin to ingredients that require Food Safety endorsements such as cGMP.

Equipment Ratings

Before selecting equipment for use, evaluation criteria should be established based on your business needs and compliance. Some authorities having jurisdiction require extraction equipment to come with stamps, certifications, or endorsements from organizations such as ASME, UL, and NFPA as relevant to ensure equipment safety and fit for use.

Room Environmental Controls

Grinding rooms often need separate dedicated ventilation and filtration to be checked against grinding method/equipment and concentration of particulate (typically measured in parts per million (ppm) in the air. Dust collection systems for grinding equipment are effective ways to keep dust levels at manageable levels, reducing the need for time consuming cleaning procedures. Extraction and final product rooms may require additional ventilation considerations and monitoring sensors depending on the extraction method or final product type. Example: Solvents will require sensors and air exchanges located near the ground level since most solvent fumes tend to be heavier than air. 

HVACD Management

Designing your facility involves HVACD (Heating, Ventilation, Air Conditioning, and Dehumidification) management that considers airflow controls areas, airflow, and fire protection within control areas. Rooms may require positive and negative pressures with calibrated pressure indicators. You should aim at having a leveled constant environment.

Safety and Injury Handling

Facilities need to have sufficient accessible First Aid and Burn Kits on site. Safety and Emergency Showers are often determined by code and the type of extraction solvent in use at the locations. Eye wash stations may also be required.

Spill and Solvent Safety

In areas where solvents are or may be used, you will need to have barrier/spill kits specific to the solvents and extraction materials on hand. This barrier can be built in or hand delivered per emergency. Solvent storage locations, depending on the type of solvent and hazardous rating. 

Having one or two dedicated people to run point on spills can be part of a comprehensive spill procedure that would include evacuation of the area, assessment of the spill and of the clean up technique, disposal method, etc. There are many materials that are not compatible or properties that make them volatile under certain circumstances so having dedicated people to evaluate the situation will save you time, money, and any possible mishaps. 

Solvent Storage

Indoor and outdoor solvent storage are dictated by NFPA, ICC-IFC, and local regulations. Storage types and limits are essential to check before buying or building a facility. Fire professionals base these limits on several factors of flammability including class and volatility. You may also need to adhere to SARA Type III reporting depending on the solvent and storage amounts. Do not forget about solvent tank types, whether they need to be mounted or chained to walls, security access controls, and SDS requirements.

Solvent Enclosure

C1D1, C1D2 is needed for solvent use. The actual type of solvents (e.g. CO2, Ethanol, etc.), and volume of solvent will dictate the different requirements for enclosures. This section pertains to areas in which the solvent would be transferred, mixed, extracted, recovered, etc. The type of enclosure is dependent on the type and class of solvent. Most enclosures will have volume limits, containment, vapor detector, electrical and ventilation requirements. 

Emergency Ventilation

Ensure wall switch and fast ventilation, automated ventilation when sensors are activated during spill of contaminate.Sensors to be located where appropriate for the substance in use. Coordinated with the fire marshall to meet local requirements through design with architect and mechanical teams.

Employee Access Control

Limiting door access, proper security labeling, and key sets for employees need to be part of your overall security plan. LThe idea is to prevent unauthorized personnel from accessing the extraction space compliant with the local regulatory body. 

Equipment Regulatory Listing

There are requirements such as UL certifications/marks which are dependent on the actual device and intended use. Always contact your local code enforcement office and a licensed contractor.

Check Out These Related Articles for More Top Things to Consider When Planning:

Part 1 – Cannabis Cultivation Facilities
Part 2 – Cannabis Extraction Facilities
Part 3 – Cannabis Food Production Facilities
Part 4 –Cannabis Retail & Dispensary Facilities
Part 5 – Cannabis Facility Support Areas

Member Blog: Evaporation is Costing the Cannabis Industry Millions. Here’s Everything You Need to Know. 

by Peak Supply Co

As cannabis ages, many of its therapeutic components degrade and transform into less effective compounds. Here’s everything you need to know about cannabis degradation, how the compounds are affected, and a few ways to restore products that have seen better days. 

How long do cannabis and hemp buds stay fresh?

Cannabis is made up of various naturally occurring chemical compounds, including cannabinoids, terpenes, flavonoids, lipids, and fibers. Just like all organic materials, these components break down and degrade over time. 

Think about your favorite fruits. Fresh oranges for example, will eventually rot as they age and their molecular compounds break down. When exposed to light, their outer layers start to spoil in a process known as photodegradation that causes discoloration and loss of flavor, vitamins, and proteins. 

Further enzymatic chemical reactions occur and transform water, vitamins, and other molecules into different formations that can degrade even further with added heat or moisture loss. The oranges will lose their zesty aroma, sweet flavor and will be more susceptible to microbes, which will eventually cause the fruit to spoil. That said, dried fruits can be stored in a pantry for much longer before they’re no longer safe to eat as the “conditioning” or “curing” process can make them shelf-stable for up to a year. 

Like dried fruits, cannabis and hemp undergo a curing process that helps to equalize the moisture content among the buds. This process reduces the risk of mold and spoilage while keeping the flower fresh, flavorful, and potent. Following this process correctly can keep cannabis and hemp flower “fresh” for 3-6 months or longer if stored properly. However, even with the most disciplined processes and practitioners, eventually, all organic materials begin to break down from exposure to the elements. 

Much like our dried oranges example above, cannabis and hemp stored in suboptimal conditions are more susceptible to “rot” and can lose everything that makes them special. Light and temperature can contribute to the degradation of these natural features, but the biggest factor in terpene degradation is moisture content – or the lack of it. Moisture helps to preserve these compounds for prolonged periods of time.

What happens to the terpene profile and moisture content of cannabis and hemp over time?

On average, 12% of all cannabis and hemp biomass is moisture. As that moisture evaporates, it takes valuable terpenes and other essential oils with it leading to dry and brittle plant matter. Terpenes are naturally occurring chemical compounds found in plants that are responsible for their unique aromas and flavors. They also add and help preserve moisture. Cannabis and hemp contain an unparalleled profile of 100+ different terpene isolates that all evaporate at different rates based on temperature and humidity.  

While live terpenes smell most potent during the flowering phase, terpene degradation starts immediately after the buds are cut from the stem. This happens because terpene oils, especially the most pleasant ones found in tiny amounts, tend to have low-temperature tolerance thresholds and evaporation levels. Once these terpenes have evaporated they will not be replaced by the living plant after cutting. This is why curing and storage is so important post-harvest. The curing stage allows for the terpene profile to mature but, even during this process terpene potency will continue to weaken.

When flower is stored below 50-55% RH (Relative Humidity) it leads to the fragile cannabinoid and terpene-rich trichomes to become brittle and break off. This lowers potency and causes the terpenes to evaporate with the remaining moisture content. The longer cannabis and hemp are stored in these conditions, the less potent, flavorful, and aromatic they become. On the other hand, going over 65% RH is in the danger zone of where mold can thrive and wreck a harvest with bona fide rot. 

Who is affected by terpene and moisture degradation?

In short, terpene degradation affects everyone. Growers see the most significant profit loss as evaporation can take pounds and pounds of cannabis away from their final numbers in as little as 14 days. Dispensaries also see a loss of profit as the flowers dry during transit and while sitting on the shelf, making it so that they paid for more than what they actually ended up selling to their customers. 

In the end, consumers are eventually the ones left holding the bag. Not only is the flower at its highest degradation stage by the time it gets into their hands but loss in weight can turn a pre-packaged 3.5g eighth into 3.15 grams or less. 

The example in the graphic below outlines how moisture degradation affects both yields and profit. 

How can you stop your cannabis from drying out? 

Using orange peels and pieces of bread for rehydration used to be the norm in what feels like ages ago. In the more recent past, cultivators, dispensaries, and consumers alike have relied heavily on moisture-control products like Boveda brand or Boost brand humidity packs. These products can help to keep moisture in the 50-65% optimal range. However, they do have their drawbacks. 

The humidity packs have a definite shelf life and in extremely dry conditions, they can’t keep up with the rate of evaporation – almost to the point where many claim they don’t actually work. While they can help maintain some moisture content, they can’t rehydrate buds that have gone below the 50% humidity threshold. This makes them closer to a moisture stabilizer of sorts than a moisture booster or replenisher. Beyond using the aforementioned “ancient ways” to rehydrate abused cannabis flower, these packs have been the only option available to the industry. 

However, recently a new product on the market called the “Cure-Egg” has been making waves and has been proving invaluable when it comes to product reclamation and preservation. The Cure-Egg’s patented ergonomic design and utility works in a similar way to the hydration packs but boasts the ability to rapidly rehydrate biomass in a few days’ time while staying under the mold growth threshold. 

In addition to its ability to quickly rehydrate cannabis and hemp flower it also comes with the added benefit of terpene infusion to counteract terpene loss. Oftentimes beautiful-looking flower is grown but it somehow misses the mark when it comes to the nose. This product could be a game-changer for farms, dispensaries or anyone sitting on older product that has lost its zing from prolonged storage or errors in production. 

Users are quickly finding out that they can take less than premium flower destined for the world of “affordable pre-rolls” and easily turn them into a flavor and aroma-packed desirable product that doesn’t have to come at a discounted price. Time will tell if this product will become the next industry staple but one thing is for certain, innovative new products are definitely shaking things up.

Peak Supply Co provides the first true all in one solution providing terpenes, vape cartridges, package design and production, helping clients progress from starting creative to finished product. 

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