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18. Water quality: waste«~aters <br />a. Describe sources, composition and quantities of all sanitary, municipal and industrial wastewater <br />produced or treated at the site. <br />Not Applicable <br />b. Describe waste treatment methods or pollution prevention efforts and give estimates of composition <br />after treatment. Identify receiving waters, including major downstream water bodies (identifying any <br />impaired waters), and estimate the discharge impact on the quality of receiving waters. If the project <br />involves on-site sewage systems, discuss the suitability of site conditions for such systems. <br />Not Applicable <br />c. If wastes will be discharged into a publicly owned treatment facility, identify the facility, describe any <br />pretreatment provisions and discuss the facility's ability to handle the volume and composition of wastes, <br />identifying any improvements necessary. <br />Not Applicable. <br />19. Geologic hazards and soil conditions <br />a. Approximate depth (in feet) to ground water: 20 feet minimum 50 feet average; <br />to bedrock: 140 feet minimum 170 feet average. Describe any of the following geologic <br />site hazards to ground water and also identify them on the site map: sinkholes, shallow limestone <br />formations or karst conditions. Describe measures to avoid or minimize environmental problems due to <br />any of these hazards. <br />There are no known sinkholes or shallow limestone deposits or karst conditions at this site. The first <br />bedrock unit beneath the glacial deposits is the Eau Claire Formation, consisting of alternating <br />sandstone and shale layers. The Eau Claire formation is generally considered a confining unit. <br />b. Describe the soils on the site, giving NRCS (SCS) classifications, if known. Discuss soil texture and <br />potential for groundwater contamination from wastes or chemicals spread or spilled onto the soils. <br />Discuss any mitigation measures to prevent such contamination. <br />According to the Sherburne County Soil Survey, the predominant soil types located on the site are <br />gravelly coarse sand, coarse sand and sand. Soils are Stonelake and Sanburn complexes (1253C and <br />1253B). All of the site soils are granular soils that are well to excessively drained. The majority of site <br />soils have low moisture holding capacity and low natural fertility which are serious limitations for crop <br />production. <br />Granular materials are relatively permeable and can rapidly transmit contaminants through the soil <br />column to the ground water table. Mining activity will not involve the use of chemicals or hazardous <br />substances. There will be no fuel storage on the subject property. All fuel storage associated with the <br />existing operation is in accordance with MPCA standards. Equipment is kept in good repair and routinely <br />maintained. <br />All vehicle and equipment maintenance follows the company's spill prevention policies. The site <br />operates under a number of spill prevention and clean up requirements as defined by various federal and <br />state regulations. Company policy regarding spills is that any spill of oil, gasoline, diesel fuel or lubricant <br />is to be reported and cleaned up promptly. In addition, "topping-off' tanks is not allowed under <br />company procedures. This practice helps eliminate accidental spills during petroleum materials transfer. <br />20. Solid wastes, hazardous wastes, storage tanks <br />a. Describe types, amounts and compositions of solid or hazardous wastes, including solid animal <br />