Laserfiche WebLink
COLORADO GOLDFIELDS INC. RESPONSE <br />DRMS DEFICIENCY LETTER DATED SEPTEMBER 21, 2011 <br />NOI -P- 2011 -027 <br />Deficiency Issue 3: Sampling Protocols and QA /QC for the samples procured by CGI on June 29, 2011 <br />Following are responses to the Divisions Questions: <br />a. How were the samples handled prior to delivery to the laboratories? <br />The Samples were collected in two bottles for each sample provided by Green Analytical Laboratories, <br />75 Suttle Street, Durango, Colorado 81301. The samples were collected on June 29, 2011, between <br />16:55 and 17:15 hours at the Silver Wing mine site; the samples were placed in an insulated cooler and <br />kept cool with ice packs until the samples were delivered to the laboratory at 13:10 on July 1, 2011. The <br />samples were taken by Stephen C. Fearn and retained in his custody until delivered to the laboratory as <br />shown on the Chain of Custody Record. <br />b. Were the samples filtered in the field or in the laboratory? <br />Two sample bottles were provided by the laboratory —the first for unfiltered raw water; and, the second <br />for water to be filtered and preserved with acid upon receipt at the laboratory. <br />The laboratory has advised through its Technical Director, Jacob Miller, that the holding time for metals, <br />as sampled, other than mercury, is 6 months; mercury is 28 days — if the samples are kept cool and <br />received within 48 hours for filtering and preservation. <br />c. Method of preservation of the samples <br />Nitric Acid for dissolved metals. Samples are kept cool between the sampling event and delivery to the <br />laboratory. <br />d. Were pH and conductivity measured in the field or in the laboratory: If they were measured in the <br />field, please report the field measurements. <br />Conductivity, pH and temperature were measured in the field. The following are the field values: <br />SW -1 <br />SW -2 SW -3 <br />Ph 6.89 6.29 6.73 <br />Conductivity uS /cm 86.2 670 88.9 <br />T (C) 7.1 12.3 7.3 <br />