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- '� � III IIIIIIIIIIIII III � <br /> 999 QC'►�SCYLCL� <br /> Comments to Marathon Response Letter File: 83-52 <br /> 1 . What is disturbed acreage to date? <br /> What is total volume of bulk sampling which has been removed to date? <br /> What are the average pit sizes i .e. surface area and depth? <br /> 2.It is stated that no cyanide is used in the pilot plant this is not the <br /> case. The Division feels that the cyanide extraction operation on site is <br /> of pilot plant scale not laboratory bench scale. A small Merril-Crowe system <br /> is onsite. Approximately 20 small cement mixers are on site for mixing <br /> solutions with mined or sampled material . Cyanide use is not approved in the <br /> existing permit. <br /> Bulk Sampling may be an issue and we need a Board determination of sample size <br /> and perhaps total annual volume. The operator states that approximately 2 tons <br /> per week is processed in the cyanide extraction process. Also approximately 2 <br /> tons per month of mill concentrate is procesed in the cyanide extraction <br /> process. <br /> 3. The Division thanks Marathon for thanking the Division for reminding them <br /> of topsoil requirements, but when will actions commence to correct topsoil <br /> handling and storage problems? <br />