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D S <br />Environmental Services <br />Environmental Chemistry <br />Site Sampling & Testing <br />Site Assessments <br />Strategic Planning <br />Soil d Geochemistry <br />?r<<? <br />e?„e?d„ Re?rarcn <br />Wetland Remediation <br /> <br />Harold Luzar <br />Mine Development, Inc <br />3319 East 4t Ave. <br />Durango, CO 81301 <br /> <br />January 7, 2009 <br /> <br />Re: Neglected Mine, Permit # M-1981-165 3 RECOVED <br />Dear Mr. Luzar, JAN 13 2000 <br />Division of Reclamation, <br />We have received your request for additional informatior (Mo Safety <br />proposed extraction process to size it for 50-60 pounds of ore with <br />extraction in a standard cement mixer. We understand that you would <br />like additional information on the total water and total chemicals used in <br />one of these "smaller" batches. We also understand that you would like <br />recommendations on potential control procedures in case of the spill of <br />an entire "small" batch. We would like to suggest to Mine Development, <br />Inc. the following: <br />1 ] As a matter of perspective all but one of your process chemicals are <br />currently used for household products and as such are assumed to pose <br />a low potential impact. <br />• NaBr is used in hot tubs <br />• NaCI is common table salt <br />• Potassium mono-persulfate is used to catalyze resins used in arts <br />& craft projects <br />• NaOH [household lye] used in oven cleaners, soap making, etc. <br />• HCI is used in a variety of toilet bowl cleaners sidewalk cleaners, <br />etc. <br />Again as to perspective all but one of these chemicals are no more <br />dangerous than the average cleaner section of a local supermarket. <br />Reclamation Services <br />2] The chemical that poses the most concern is Sodium Borohydride, <br />which is a reactive chemical. Specific recommendations are seen <br />below. <br />.................................. <br />79 S t, t t l e S t . 3] As outline in our pervious letter [dated April 25, 2008] spilled materials <br />P . o . B o x 4124 would be within the proposed containment area. Because of the unique <br />Durango, CO 31302 aspect of the proposed extraction process spilled materials [chemicals <br />and process ore] can be placed into the next reaction cycle and with <br />I 3 0 o s 5 3 b t3 small chemical adjustments can be used again. Since all operations will <br />Fax 970 247 739' be carried out within the proposed containment area any true loss of <br />cclsertviroru:frontier. net process chemicals would be small. Below is a summary of the proposed <br />amount of process materials that would be used in a single "small" 50# <br />batch <br />We have moved, our new address is 779 Tech Center Drive #101 - local phone is 247-0132