Laserfiche WebLink
3.4 West Sunday Mine • <br />Description: The West Sunday Mine is a uranium mine excavation facility with a mine entrance <br />portal and a main shop. The facility stores and uses petroleum in the form of diesel fuel, engine <br />lubricating oil, hydraulic oil, and rock drill oil. The products are stored in <br />ASTs, and are used at the mine site as needed. The Site Location Map and mine-specific Site <br />Map are included in Appendix A. The Site Map (Figure 2D) shows the location of oil <br />containers, buildings, unloading/loading areas, and critical spill control structures. <br />Operation: The facility operates as a repair shop, and active mining excavation operations are <br />occurring at this time. The site is manned during regular work hours from 7:00 AM to 5:00 PM <br />Monday through Thursday. Occasionally, the site is manned on Fridays also. Personnel at the <br />facility include maintenance personnel and mining personnel. <br />Bulk Storage: West Sunday Mine has one 1000 gallon aboveground diesel fuel bulk storage <br />tank. The tank is located in a lined earthen berm that is sized to provide containment for the <br />entire capacity of the larges single container and sufficient freeboard to contain precipitation. <br />Secondary containment dimensions and volume calculations are presented in Appendix C. Three <br />55 gallon drums on a rack are located inside the main shop. Four additional 55 gallon drums are <br />also located in the main shop. Secondary containment units placed under drums are sized to <br />provide containment for the entire capacity of the largest single container with sufficient <br />freeboard. The oil containing storage and equipment are summarized in Table 3-4 below. All <br />containers with capacity of 55 gallons or more are included. <br />Overfill prevention for the 1000 gallon diesel fuel tank is provided by an automatic shutoff <br />sensor in the nozzle of the delivery truck hose. <br />The non-SPCC regulated storage located at this facility consists of two water tanks located <br />approximately 150 feet and 175 feet northwest of the portal. <br />Equipment: This facility has no SPCC-regulated equipment. <br />Loading Operations: The West Sunday Mine receives diesel fuel via tank truck deliveries. All <br />suppliers must meet the minimum requirements and regulations for tank truck loading/unloading <br />established by the U.S. Department of Transportation. Denison ensures that the vendor <br />understands the site layout, knows the protocol for entering the facility and unloading product, <br />and has the necessary equipment to respond to a discharge from the vehicle or fuel delivery hose. <br />The facility manager or his/her designee supervises oil deliveries for all new suppliers, and <br />periodically observes deliveries for existing, approved suppliers. All loading and unloading of <br />tank vehicles takes place only in the designated loading rack/unloading area. Vehicle filling <br />operations are performed by facility personnel trained in proper discharge prevention procedures. <br />The truck driver or facility personnel remain with the vehicle at all times while fuel is being <br />transferred. The fuel delivery truck is equipped with an automatic shutoff nozzle sensor. The <br />drums are manually loaded or unloaded and monitored by visual inspection. <br />Piping Systems: There are no sections of aboveground piping at this location. • <br />Denison Mines (USA) Corp. 15 SPCC Plan <br />Sunday Mines December 2007