Processing by BSi Inspectorate Clause Samples

Processing by BSi Inspectorate. BSi Inspectorate re-bagged the pulps using the following process: 1) In order to maintain a uniform sample sequence with the insertion of blind standards and blanks original pulps must be re-bagged and re-numbered. 2) Existing pulps were rolled and a 100 gram split taken for the new assay. 3) Pulps were re-bagged in a new envelope and given a new sample number. A cross-reference list was maintained to index the original pulp sample numbers to the new split pulp sample numbers. The original list was given to BSi Inspectorate as an Excel spreadsheet containing existing pulp sample numbers and locations for the insertion of blind standards and blanks. BSi Inspectorate then filled in an index field on the list with the new sample number sequence. The list was delivered to Atna Resources, both as hard copy and digital, once pulp preparation was completed. 4) BSi Inspectorate inserted certified standards from CDN Resource Laboratories Ltd. into the sample sequence at a rate of 1 standard for every 20 samples. Standards were given sample numbers that maintained a uniform numbering sequence for the entire job (see step 1). These numbers were listed on the cross-reference sheet with the following additional information: accepted assay value for the standard, matrix type, and Standard Reference ID #. Statistics for the certified standards were available from CDN Resource Laboratories’ website. Table 13-2, CDN Resource Laboratories Standards, lists the standards. 5) BSi Inspectorate also prepared and inserted into the sample sequence silica sand blanks at a rate of 1 for every 20 samples. Standards and Blanks were not inserted adjacent to each other. Again, sample numbers for blanks maintained a uniform numbering sequence for the entire job, and were identified in the BSi Inspectorate cross reference list as “silica sand blank” along with a corresponding sample number. 6) Samples were delivered to ALS Chemex in four separate batches for analysis.