Laserfiche WebLink
If you have any questions or desire further information please do not hesitate to contact Mike Harris or myself. <br />Please respond and confirm that this is the intended direction that Cotter intends to take in this <br />matter. <br />Scott Klarich, Unit Manager <br />Enforcement Unit <br />Compliance Assurance Section <br />Water Quality Control Division <br />Colorado Department of Public Health and Environment 4300 Cherry Creek Drive South Denver, Colorado <br />80246-1530 Direct Line: (303) 692-3564 <br />Fax: (303) 782-0390 <br />In-State Toll Free: (800) 886-7689 (Ask for Scott Klarich) <br />E-Mail: scott.klarich@state.co.us <br />>>> John Hamrick <John.Hamrick@cotterusa.com> 6/18/2010 11:38 AM >>> <br />Cotter Corporation has received a limited-time offer to install an interim measure from Water Remediation <br />Technology, LLC (WRT). For this reason, Cotter is seeking approval from the Water Quality Control Division <br />of this measure in advance of submitting a detailed written plan and expedited time schedule for the <br />implementation of interim measures pursuant to Paragraph 27 of the Notice of Violation/Cease and Desist <br />Order, Number I0-100601-1 ("Order"). Nonetheless, this proposal of an interim measure for removal of <br />uranium from Sump 1 water, and discharging that treated water back into Ralston Creek, is being submitted <br />pursuant to Paragraph 27 of the Order. Accordingly, this is a partial submittal as per Paragraph 27 of that <br />Order. The complete and formal submittal will be forwarded to the Division on or before the deadline in the <br />Order. <br />Cotter's contractor, WRT, has advised Cotter that a water treatment unit identical in function but smaller in <br />treatment capacity is available if Cotter authorizes procurement and purchasing beginning today, June 18, 2010. <br />They estimate the unit can be treating water beginning July 3, 2010. If Cotter does not authorize procurement <br />and purchasing today then this opportunity may not be available Monday, June 21, 2010. <br />Note that based on water quality measurements from Sump 1 Cotter has not identified any constituent except <br />uranium that will require treatment to meet Colorado standards. <br />The following is a description provided by WRT: <br />WRT Temporary Treatment Plan <br />WRT will provide a temporary treatment system for the removal of uranium only for a period of approximately <br />4 to 5 weeks. The system will be designed to handle a continuous flow of approximately 50 GPM. <br />The equipment will consist of a pre-filtration skid utilizing bag filters with 100 micron nominal filtration, <br />followed by two treatment vessels operating in series. Each treatment vessel will be approximately 63" <br />diameter x 86" tall and will each contain approximately 85 cubic feet of Z-92(r) Uranium Removal Media. <br />Based upon an anticipated flow rate of 50 GPM, raw water uranium level of 2,000 ug/L, and a raw water sulfate <br />level of 200 ug/L, this system should deliver treated water that contains less than 30 ug/L for the treatment <br />period of about 4 weeks before the treated water uranium levels may begin to increase above the 30 ug/1 level. <br />Z-92 Uranium removal media is NSF Standard 61 certified for the treatment of drinking water. No chemicals <br />are used in this treatment process. Each treatment vessel contains a safety discharge screen on the outlet piping <br />to prevent treatment media from exiting the vessel. This temporary treatment system represents a scaled down <br />version of the long treatment process that is planned for this site. <br />The attached information has been provided by Whetstone.