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ADZ Laboratories, Inc. <br /> 2773 Downhill Drive Steamboat Springs, CO 80487 (800)334-5493 <br /> Ouray Silver Mines December 03, 2021 <br /> Project I D: <br /> ACZ Project ID: L69171 <br /> Sample Receipt <br /> ACZ Laboratories, Inc. (ACZ)received 1 miscellaneous sample from Ouray Silver Mines on October 12,2021. The sample <br /> was received in good condition. Upon receipt,the sample custodian removed the sample from the cooler, inspected the <br /> contents, and logged the sample into ACZ's computerized Laboratory Information Management System (LIMS). The sample <br /> was assigned ACZ LIMS project number L69171. The custodian verified the sample information entered into the computer <br /> against the chain of custody(COC)forms and sample bottle labels. <br /> 'Holding <br /> All analyses were performed within EPA recommended holding times. <br /> Sample Analysis <br /> This sample was analyzed for inorganic parameters. The individual methods are referenced on both,the ACZ invoice and <br /> the analytical reports. The extended qualifier reports may contain footnotes qualifying specific elements due to QC failures. <br /> In addition the following has been noted with this specific project: <br /> 1. (N1) 1-69171-01/TOTAL DISSOLVED SOLIDS <br /> Oven range is 80 C to 91 C. Over the weekend,the oven had a minor low temperature out of range. When the oven <br /> temperature was checked on Monday 11/1/21,the min temp read at 76.7?C.The WG was removed from the oven on <br /> 11/1/21 when the oven was back in range. <br /> 2. (N1) Neutralization-Potential-Modified and Pyritic sulfur used for ABBA calculations. <br /> L RIMT618 Page 2 of 25 <br />