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Environmental Chemistry Laboratory <br />Customer Technical Assistance (CTA) Form <br />General Information Lab Notebook No.: NA <br />Customer Name: Trevor Anderson Date/Time of Contact: 6/4/2021 @ 1429 <br />Communication Method: ❑ Telephone N Email ❑ In -Person <br />Reason/Parposefor Contact: Confirm Site name on report and Chromium VI analysis. <br />Additional Information <br />Authorization No.: 20ECO105 <br />Test Method: Cr(VI) <br />Other Information: NA <br />Summary of Discussion & Resolution (Provide as much detail as possible): <br />- Trevor confirmed that method 7196A would be used to run Chromium VI. <br />- Trevor confirmed that we can still run the analysis for Chromium VI even if the sample is outside of the <br />hold time. <br />- Trevor confirmed that the Stockton Propeller, Inc. is the official site name. <br />Recorded by: <br />Karlaina Gipson for Francisco Montahan elm, Jin For Francisco Montalvan 619/2021 <br />Name ° Signature/Date <br />DCN: 07.0149.00_rev 2-09/17/2020—Approved by Quality Management Officer Page NA of 50 <br />Page 1 <br />Page 16 of 20 <br />