FREQUENTLY ASKED QUESTIONS

Sonoma Lab Works offers a wide range of services from potency analysis, contaminant detection, to supply chain consulting to ensure accuracy and compliance.

Located in the heart of Sonoma County, we offer quick turn-around times and unparalleled customer service.

• We employ high- pressure liquid chromatography (HPLC-PDA) for routine cannabinoid analysis.

• Gas chromatography in conjunction with both a mass spectrometer (GCMS) and a flame ionization detector (GC-FID) is used to separate and identify volatile compounds such as terpenes and residual solvents.

• Microbial contaminants are efficiently and accurately screened using quantitative polymerase-chain reaction (qPCR).

• Pesticide residues are examined by both liquid chromatography, triple quadrupole mass spectrometry (LCMS/MS) and gas chromatography, triple quadrupole mass spectrometry (GCMS/MS).

• Sonoma Lab Works utilizes inductively coupled plasma mass spectroscopy (ICPMS), vs. AAS testing, as ICPMS is more sensitive and standard for fast     multi-element determination of heavy metals in trace and ultra trace concentrations in different sample matrices..

What is your standard turnaround time?

For R&D our turnaround time is 3-5 days. Compliance is no more than five business days.

*Payment is required prior to the completion and release of test results. Please contact accounting@sonomalabworks.com for more information.

If I want to place a rush for a quicker turnaround, when can I expect to receive results?

If your batch is sampled and returned to the lab before 12:00pm, you can expect results at the close of the next business day. If your sampling appointment is in the afternoon, you will receive results at the close of the second business day.

EX: Sample picked up and arrives at the lab before 12:00pm on Monday. You can expect to have results by the end of day Tuesday.

EX: Sample picked up and arrives at the lab after 12:00pm on Monday. You can expect to have results by the end of day Wednesday.

How do I submit a compliance sample for testing?

Please refer to the attached metrc bulletin number: : CA-IB-0004-Creating Test Samples In Metrc for Regulatory Compliance Testing

How do I submit a compliance batch for testing that contains multiple size units?

You will need to create a multi-package in metrc. Please refer to the attached metrc bulletin number: CA-IB-0004-Creating Test Samples In Metrc for Regulatory Compliance Testing  

“Only one test sample package should be created from a package. Having more than one test sample package can cause the Lab Testing State of a package to be set to Testing in Progress after the testing laboratory has recorded the test results on the tested sample, preventing you from moving your product.” -Metrc bulletin CA_IB_0004

Do I need to transfer R&D in metrc?

We recommend you transfer R&D samples through metrc; however, it’s not required. If you do submit R&D through metrc, make sure you do not submit it for lab testing.

When will the status of my sample change from testing in progress to test passed?

After your COA is released, it takes up to 24 hours for the test status to change in metrc to testpassed. If you attempt to move the product or create a package while status is listed as Testing in Progress, this will lock your batch and you’ll need to reach out to metrc.

How do I create an order for an R+D sample?

Log into the Sonoma Lab Works client portal and follow these instructions: SLW Sample Submission Instructions

Once you’ve created your order, print out the COC (Chain of Custody) and drop off your samples between 9:00am-5:00pm M-S.

How much sample is needed for R+D testing?

Potency tests for flower require 2-3g. All other tests require 1g of material.

For example: potency, pesticides, heavy metals require a minimum of 3g (or 4-5g for flower). 

Please note, providing more sample is encouraged to ensure an accurate representation of the batch. This is especially important for flower as it can vary widely within a batch, or when you are pre-testing for any compliance bound products.

Why do Field Sampling Technicians pull from multiple bags?

The BCC Regulations require a set number of increments from each batch to form a random sample.

How much unpacked/packed flower is required for sampling?

We collect .035% of the total batch, rounded to the nearest whole, which is the minimum amount required by the BCC. Additionally, phase three testing requires a minimum of 10g.

Equation: ___ grams x .0035 = Sample Size (rounded to the nearest whole)

How much sample is needed for manufactured products or prerolls?

The chart below can be used as a guide to determine how much product is required for testing. Keep in mind, phase three testing requires a minimum of 10g. This means we will sample more product, if needed, to equal the 10g minimum.

Do you have discounts?

Your first order with us gets you 10% off! We offer other discounts based on volume. Please reach out to Erika Lindeman, our Business Development Director, for more information. She can be reached at Erika@sonomalabworks.com. 

What is LOD and LOQ?

The LOD is the Limit of Detection and represents the lowest amount of an analyte that can be detected and reported. The LOQ is the Limit of Quantitation and represents the lowest amount of an analyte that can be quantified.

A result that is below the LOD is reported as Non-Detect. A result that is above the LOD and below the LOQ is reported as <LOQ, or below the limit of quantitation. A result that is above the LOQ will have a numerical value.

What’s the difference between R&D testing and Compliance Testing? COA and ROA?

R&D test results will be issued through a ROA, or Report of Analysis. This document will include the results for all tests ordered for a sample. R&D testing is typically conducted prior to compliance testing and may be ordered by any type of licensed business. ROA’s will be issued directly to the client who requested the tests. These results are only representative of the sample provided to us, and do not serve as certification of a larger batch.

Compliance test results will be issued through a COA, or Certificate of Analysis. This document will include the results for all tests required by BCC regulations for the appropriate product type. Compliance testing is conducted once a product is in final form and the batch is held in quarantine at the site of a licensed distributor. The distributor will request a compliance test for a batch and our Field Sampling Technicians will sample the appropriate amount of the batch in accordance with BCC regulations. COA’s will be issued directly to the distributor who requested the tests and the Bureau of Cannabis Control upon completion.

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