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ACZ Laboratories, Inc. <br /> 2773 Downhill Drive Steamboat Springs, CO 80487 (800)334-5493 ;+ <br /> r,3 <br /> Ouray Silver Mines February 24, 2021 <br /> Project ID: <br /> ACZ Project ID: L64296 <br /> ACZ Laboratories, Inc (ACZ)received 3 groundwater samples from Ouray Silver Mines on February 16, 2021. The samples <br /> were received in good condition Upon receipt,the sample custodian removed the samples from the cooler, inspected the <br /> contents, and logged the samples into ACZ's computerized Laboratory Information Management System (LIMS). The <br /> samples were assigned ACZ LIMS project number L64296. The custodian verified the sample information entered into the <br /> computer against the chain of custody(COC)forms and sample bottle labels. <br /> All analyses were performed within EPA recommended holding times. <br /> These samples were analyzed for organic 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 OC failures <br /> In addition the following has been noted with this specific project <br /> 1. (R1)Applies to /TPH C10 TO C28 <br /> Control Sample(LCS)Precision (RPD)was above acceptance limits (21%) Both LCSW and LCSWD recoveries were within <br /> acceptance criteria. <br /> L6�9W-D8H4?k8 M2012032 TR12 PAR A3 pg 2 of 125 Page 2 of 15 <br />