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Hi Team Mayo, Thanks for the heads up and for reaching out for support here. The Peth quote is still active so as far as placing the order goes we are all set there. Brice- To make sure we communicate this request correctly to our team, can you clarify what the request is here? For 16:0/18:2 we used Cerilliant lot FN08182409. For 16:0-18:1 we used Avanti lot 840514P. • Is the request to use any lot numbers other than what was used in this batch, or is there a specific lot number/supplier you desire? • Does this request apply to both analytes or just one? 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 From: Johnson, Brice R., M.H.A. <Johnson.Brice@mayo.edu> Sent: Friday, October 17, 2025 2:42 PM To: Dragomir-Daescu, Kristin E. <DragomirDaescu.Kristin@mayo.edu>; UTAK Quoting <quoting@utak.com>; Support@UTAK <support@utak.com>; Andrew Hartmann <ahartmann@utak.com> Cc: Gaffron, Christopher C. <Gaffron.Christopher@mayo.edu>; Rollins, Lisa A. <Rollins.Lisa@mayo.edu>; Eliason, Dave B. <Eliason.David@mayo.edu>; Steere, Rachel M. <Steere.Rachel@mayo.edu> Subject: RE: Mayo PETH Level 3 Control UTAK, Would you mind purchasing a new stock ampule for this order? I’m assuming you use Cerilliant. There have been a lot of concerns with the last batch of stocks they make for these analytes and just recently released a new batch that we have found success with. Thank you, Brice Brice Johnson, M.H.A. (He/Him/His) | Supervisor | SU 2-220-16 | Clinical and Forensic Toxicology Laboratory (CFTL) | Call 507-284-0345 | johnson.brice@mayo.edu| Mayo Clinic | 3050 Superior Drive NW, Rochester, MN 55905 | www.mayoclinic.org