Medium · Use it
A jar and its report have different batch numbers. What comes next?
See the Medium answer and why
Pause the comparison and request the matching report. A similar product name is not enough to resolve the mismatch.
Budtender practice · Unit 3 OF 8
Read the label and check the report
Connect a product to the evidence for its batch.
Try the first question before reading the lesson. Say your answer aloud or write it down, then open the explanation.
Start with a question
What does COA stand for?
See the Easy answer and why
Certificate of Analysis: a lab report. The word guide explains how to read it.
Work through the idea
A lab report is a record for a sample. Start by matching the product and batch identifiers. Then check the lab, dates, tests and results. If an identifier does not match, ask the retailer or responsible colleague to resolve it.
Do not turn one passing test into “tested for everything.” Ask what was measured and what the report does not cover. The current Washington labeling rule is linked from the field guides when you need its exact requirements.
Put it into practice
Hard · Explain your judgment
A customer asks, “This passed, so nothing harmful is in it, right?”
See the Hard answer and why
“Passing means it met the stated criteria for the listed tests. It does not mean every possible substance was tested or that the result is zero.” Show the relevant test and its limit rather than promising complete safety.
Before moving on
Can you explain the answer in your own words, name one limit, and say what you would check next? If not, revisit the example or look up a word.
This practice does not record a score or award a credential. Every lesson and answer is free to read. No account needed.
Check the reference
Washington LCB: reading lab results ↗
Consumer guide to COAs and residual solvent screening. A test covers the sample and tests listed.
Reference date: 2026-09-11. Customer conversations here are teaching examples, not quotations from the source.