WSLCB Implements New Rules

Effective: 2017-08-31

WSR 17-12-032 Revision to WAC 314-55

Rules have already been codified:

WAC 314-55

New rules for cannabis testing are taking effect on 8/31/2017. Ahead of these new rules, here at Confidence Analytics we have already been audited and certified by the WSLCB for the new test requirements to ensure you have a one stop shop you can rely on once the new laws take effect. Below are the details on how these rules will impact you.

Quick links:

QA Sample Labeling
Required Tests
New Failure Thresholds
New Minimum Sample Size Requirements, Turnaround Times, and Prices


QA Sample Labeling

All samples for mandatory I-502 testing will need to be labelled with the following information to be compliant:

Your business nameSample collection date
Your license numberTesting lab name
QA sample ID numberTesting lab license
Sample weightThe words "Quality Assurance Sample"

We encourage you to adopt the new sample-labelling now. We have added a label generator for QA samples to the login page on our website (https://client.conflabs.com/) to make compliance easy. The free sample baggies we offer also cover many of the new requirements, so be sure to pick some up at our office or ask your friendly CA driver!


Required Tests

Green plant material (flower, kief, trim, etc), concentrates that involve any sort of solvent (CO2, ethanol, hydrocarbon, etc), and infused fats will have new required tests under the new law.


Green Plant Material Required Tests
Moisture Analysis (not required for hash/kief/rosin) Water Activity (new, not required for hash/kief/rosin) Foreign Matter Potency Microbial (limits changing) Mycotoxins (new)


Concentrate (Hydrocarbon, CO2, Ethanol, Food Grade) Required Tests
Potency Mycotoxin Screening (new, only if starting material untested/failed) Residual Solvents (new failure limits/requirement)


Infused Cooking Oil/Fats Required Tests
Potency Microbial (only if made with untested/failed material) Mycotoxin screening (new, only if made with untested/failed material)

New Failure Thresholds

The failure criteria for residual solvent testing and microbial testing are changing and the mycotoxin screening adds a new failure limit to be aware of.


Microbial Limits
Gram Negative/Bile Tolerant 10,000 cfu/g
E. coli Not detected in 1 g
Salmonella Not detected in 1 g


Mycotoxin Limits
Sum of Aflatoxin B1, B2, G1, G2 20 μ/kg (synonymous with parts per billion)
Ochratoxin A 20 μ/kg (synonymous with parts per billion)


Residual Solvent Limits
Acetone 5,000 ppm Hexanes 290 ppm
Benzene 2 ppm Isopropanol (2-propanol) 5,000 ppm
Butanes 5,000 ppm Methanol 3,000 ppm
Cyclohexane 3,880 ppm Pentanes 5,000 ppm
Chloroform 2 ppm Propane 5,000 ppm
Dichloromethane 600 ppm Toluene 890 ppm
Ethyl Acetate 5,000 ppm Xylene 2,170 ppm
Heptanes 5,000 ppm


Water Activity Limits
Water Activity 0.65 aw

New Minimum Sample Size Requirements

Sample sizes and required tests are specified by Washington Administrative Code, and ultimately determined by WSLCB and their traceability system.

Visit our services page for more information about minimum sample sizes, turnaround times, and prices.