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ACZ Laboratories, Inc. .011 <br />2773 Downhill Drive Steamboat Springs, CO 80487 (800) 334 -5493 <br />Rio Grande Silver, Inc. <br />Project ID: S12064 <br />ACZ Project ID: L96906 <br />Sample Receipt <br />ACZ Laboratories, Inc. (ACZ) received 2 soil samples from Rio Grande Silver, Inc. on September 24, 2012. 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 L96906. The custodian verified the sample information entered into the <br />computer against the chain of custody (COC) forms and sample bottle labels. <br />Holding Times <br />All analyses were performed within EPA recommended holding times. <br />REPAD.03.06.05 01 <br />October 04, 2012 <br />Sample Analysis <br />These samples were analyzed for inorganic parameters. The individual methods are referenced on both, the ACZ invoice <br />and the analytical reports. The following anomaly required further explanation not provided by the Extended Qualifier Report: <br />1. For the Sulfur Sulfate values flagged with an "R1 ", the RPD value was calculated using values with passing RPD's so no <br />further action was taken. <br />Page 2 of 10 <br />