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The replied to an earlier follow up and said they are sufficiently supplied on materials and still using most of their ongoing product but have stopped using cotinine QC due to discontinuation of the testing. Hi Andrew – Sorry for the delay on response I was on PTO and am now catching up on emails. We still use all of the below QC with the exception of: COT+ 100 V3 U F MC COT+ 1000 V3 U F MC This is due to no longer having nicotine/cotinine testing in house. We have not needed to order the others due to have sufficient stock. Thanks, Cassidy LeMay Medical Technologist | Toxicology | Immunodiagnostics Marshfield Clinic Health System Office: 1-715-389-3734 | Ext: 93734 | From: Andrew Hartmann <ahartmann@utak.com> Sent: Thursday, August 28, 2025 10:04 AM To: Lemay, Cassidy A <lemay.cassidy@marshfieldclinic.org> Subject: [EXTERNAL] UTAK- are you still using these products? Hey Cassidy, I hope summer has been treating you well. I was reviewing your account and see a few custom QC’s we haven’t seen ordered in a year or more. I was hoping you could provide a quick update on which ones you are still using, Hey Cassidy, I hope summer has been treating you well. I was reviewing your account and see a few custom QC’s we haven’t seen ordered in a year or more. I was hoping you could provide a quick update on which ones you are still using, and any you may have discontinued. Can you review the below and let me know which you still use? COT+ 100 V3 U F MC COT+ 1000 V3 U F MC PM+ V7 U F MC BENZO 1 U F MC BENZO 3 U F MC AMINES L CONT AMINES H V2 CONT TESTO 1 S F MC TESTO 2 S F MC TESTO 3 S F MC If you have ceased using any of these and can share the “why” it is greatly appreciated as we are always trying to improve. Thank you, Andrew Hartmann Business Development Manager – 25020 Avenue Tibbitts Valencia, CA 91355 – D +1.661.567.0667 P +1.888.UTAK.LAB F +1.661.294.9272 – Book a Meeting with Me https://calendly.com/ahartmann-utak/30min utak.com