Laserfiche WebLink
saNs®aez.eom <br /> ® aes.eom <br /> (800)334-5493 <br /> g 2M Do hW Drl" <br /> 3W.-bost BpAnps, <br /> CO 804" <br /> August 12, 2021 <br /> Ensero Solutions <br /> 12150 E. Briarwood Ave.,Suite 135 <br /> Centennial, CO 80112 <br /> To Ensero Solutions, <br /> This letter is regarding the Radium-228 analysis requested on Ensero samples collected on 6/3/2021 and <br /> 6/4/2021 and logged into ACZ's Laboratory Information Management as project L66280(eight samples <br /> total). These samples will be reported late due to required reanalysis after failing method-specific <br /> quality control parameters in its initial workgroup. <br /> The original Radium-228 analysis for these samples was completed through the counting stage on the <br /> instrument, however, it failed one of the main quality control checks for this method. Yttrium and <br /> Barium are both used as carriers through a co-precipitation procedure used to create a purified extract <br /> that is counted in a low background gas proportional counter. These carriers are added to all samples to <br /> determine the amount of analyte(Radium-228) lost, if any, during the prep procedure. Like an internal <br /> standard,the recovery of the carriers is used to adjust the observed results.The preparation batches <br /> containing the aforementioned Ensero sample(s) had carrier recoveries outside of ACZ's acceptance <br /> limits, and the resulting data is deemed too deficient to report with qualification. <br /> Our policy in this situation is to perform reanalysis,which has been started for this sample. <br /> Unfortunately,the Ra-228 method requires multiple days of labor and an ingrow period. To further <br /> complicate manners,the laboratory received an unusual amount of radiochemistry work in June and <br /> July of 2021, and this has impacted our ability to respond to quality control failures quickly. We are <br /> actively securing and re-allocating resources to improve this dynamic. <br /> If desired,we can call or email your contact at the State of Colorado to explain the reasons for the delay <br /> in receiving your final report. <br /> Please let me know if I can provide further details or any other assistance. <br /> Best Regards, <br /> Matt Sowards <br /> Co-President <br /> ACZ Laboratories, Inc. <br /> Steamboat Springs,CO 80487 <br /> Work: (970)879-6590 x531 <br /> Email: matts@acz.com <br /> PAGE 16 OF 16 <br />