Harrens FAQ

Frequently Asked Questions

Why are there residual solvents detected in my product that I didn’t use?

Many solvents are actually naturally found in cannabis. Acetone, methanol, IPA, and ethanol can all come from the plant itself and processing. Hexane is an impurity in most hydrocarbon gas extracts. If a gas company claims that their gas is 99.5% pure, there still is 0.5% leftover that is impure. If that 0.5% is made up of a heavier compound like hexane, it will concentrate in the final product.

How accurate are Harrens Lab Inc’s results?

Harrens Lab Inc is one of the few labs that test cannabis in California that are both ISO 17025 accredited and DEA registered. Having an ISO accreditation means that each step of our testing process is approved and recognized internationally. With our DEA registration, we have the ability to purchase the most accurate chemical standards for testing from laboratories with the same accreditations.

What do my Microbiology results mean?

Aerobic Plate Count: This indicates the amount of bacteria that is present in your product. <100,000 CFU/g (Colony Forming Units per gram) is the requirement for the city of Berkeley. Coliform Plate Count: This test indicates how sanitary your product is. Detection of Coliform Bacteria suggests that other pathogenic organisms of fecal origin may be present. <1000 MPN/g (Most Probable Number per gram) is the requirement for the city of Berkeley. E. coli Plate Count: E. coli bacteria is normally found in the intestines of animals and people. Presence of E. coli in a sample should not be accepted. Salmonella: Although usually caused by eating raw or undercooked meat, poultry, or egg products, Salmonella contamination can also occur by unwashed hands, reptiles and rodents, and the feces of some pets. Presence of Salmonella in a sample should not be accepted. Yeast & Mold: Certain types of mold can cause respiratory issues, allergic reactions, and even mycotoxins, which are dangerous to humans and animals. Yeast can cause infections in those with weak immune systems. <10 CFU/g is the requirement for the city of Berkeley. Pseudomonas: Rashes, ear infections, and eye infections are commonly caused by Pseudomonas aeruginosa. Some Pseudomonas infections are difficult to treat, as they can be resistant to antibiotics. Presence of Pseudomonas in a sample should not be accepted.

Why don’t the Total THC and Total CBD directly add up?

Total THC, CBD, and CBG are calculated using a ‘Decarboxylation Equation’.

(THCa x 0.877) + THC = Total THC
(CBDa x 0.877) + CBD = Total CBD
(CBGa x 0.878) + CBG = Total CBG

We cannot directly add THCa and THC together to find total THC because only 87.7% of THCa is THC after decarboxylation. With these formulas, we can calculate the maximum amount of “active” THC that can be actually derived from a sample. This is same for CBD and CBG.

If you have any questions, please contact us at (510) 887-8885 or info@harrenslab.com

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