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  • Water issues :: Nordkalk
    water levels flow and chemical composition of the surface water The aim has been to collect important information for the control program and plan actions to ensure a good water balance and water quality in the area The natural ground water levels in the area vary between seasons and between years with low and high precipitation Groundwater consists of precipitation that does not evaporate and is not absorbed by plants The remaining water trickles down into cavities and fractures in the ground and becomes groundwater The hydrogeological studies conducted in the area form a basis for the definition of the quarry s impact area The impact area for shallow groundwater which is the water available for the surrounding nature has been estimated as 300 meters from the edge of the planned quarry The distance includes a wide margin of error and the likelihood that private wells in the area would be affected is considered very low The closest well is far outside the impact area The groundwater levels within and around the quarry area will be monitored continually with pressure loggers six times a day The measurements will continue as part of the control program Surface water from the Bräntings haid nature reserve located at a higher altitude to the south of the Bunge quarry partly flows out through the planned quarry continuing downstream through a number of wetland systems and brooks before reaching the Bästeträsk lake According to long term water monitoring considerable annual and seasonal variation occurs in surface water flows Based on the monitoring results calculations have been made of how much water can be returned from the quarry to the environment in such a way that the amount corresponds to the natural water flows and levels All water accumulated in the quarry will be treated and

    Original URL path: http://www.nordkalk.de/default.asp?viewID=2018 (2016-04-28)
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  • Ancient sea water – a threat? :: Nordkalk
    crevasses and cavities in the limestone layers far above the current sea level The water dates from the time when large parts of Gotland were under water The Littorina Sea that existed 5 000 years ago was roughly twice as salty as the Baltic Sea is today and had a shoreline roughly 25 meters above the current shoreline The fact that the limestone layers far above the current sea level have been able to retain ancient sea water for such a long time is a demonstration of the extremely low water permeability of the limestone layers If this was not the case these pockets of salty groundwater would not be present above today s sea level Nordkalk s quarrying permit extends from the ground level to 1 meters above the current sea level of the Baltic Sea At 22 meters below sea level there is an extensive transition between clay poor and clay rich limestone layers In the transitional area between these limestone layers there is according to test drilling a sub horizontal fracture system containing salty groundwater consisting of relict sea water The lowest quarrying level for the Bunge quarry is thus more than 20 meters above the fracture

    Original URL path: http://www.nordkalk.de/default.asp?viewID=2027 (2016-04-28)
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  • Treatment of quarry water :: Nordkalk
    the protective ditches flows down into the quarry where it is collected This water may contain small amounts of nitrogen from explosives residues and excavated masses chlorides from the salty relict seawater and sulphate from sulphide oxidation of limestone fines The water may also contain sediment from limestone particles and minor oil spills from vehicles Before the water is returned to nature it must pass through a sedimentation basin equipped

    Original URL path: http://www.nordkalk.de/default.asp?viewID=2028 (2016-04-28)
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  • Ecology and natural values :: Nordkalk
    area will also be studied in order to recognize natural changes Because there are many activities being conducted in the area hydrological monitoring will take place in the common surface water system of the wetlands in the Bästeträsk Natura 2000 area downstream from the Svenska Minerals and Nordkalk quarries These efforts are being coordinated between Nordkalk Svenska Minerals and Region Gotland The Bunge area where the quarry will be located is adjacent to two Natura 2000 areas This places especially high demands on our management of the natural values in the area In order to ensure that the quarry does not affect the natural values too much priority species and the most sensitive habitat types will be monitored These are the so called rich fens calcerous fens with high lime where saw sedges grow and moist meadows which are dependent on the maintenance of the surface and ground water situation For this reason the ecological monitoring extends 300 meters beyond the boundaries of the future fully excavated quarry which has been defined as the maximum area of influence in terms of groundwater The annual monitoring will assess whether the vegetation of the wetlands changes over time through measurements taken at a large number of measuring points The control program has been developed by one of Sweden s leading experts on rich fen surveys and has been tested and developed further during 2011 and 2012 The control program forms the basis for adapting the protective measures around the quarry to minimize the impact on the rich fens closest to the quarry A botanical survey of the quarry area was conducted in 2006 as part of the environmental impact assessment to describe the species composition and natural values in the area before the operations begin The survey was conducted by members of

    Original URL path: http://www.nordkalk.de/default.asp?viewID=2019 (2016-04-28)
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  • Residential environment :: Nordkalk
    is sparsely populated The nearest permanent dwellings are located some 500 meters south east of the quarry and a few houses are situated along the conveyor belt At the initial stage of operations the distance between the quarrying operations and the nearest house will be more than a kilometer Potential causes of inconvenience are noise vibration blast waves and airborne lime dust There will be light traffic along the service road daily and heavy vehicle traffic monthly The conditions set in the permit define limit values for noise and vibrations at the nearest houses The consequences for residents will be monitored continually in accordance with the control program The monitoring will then be used to adapt the protective measures during the different project phases if necessary Risk assessments and inspections will be carried out at all buildings in the vicinity 1 5 km with the permission of the property owners Inspections of the properties will be carried out according to current standards The quality of drinking water will be tested and sensors will be installed to monitor water levels in private wells The wells and animal water supplies within one kilometer of the quarry will have the opportunity to take

    Original URL path: http://www.nordkalk.de/default.asp?viewID=2024 (2016-04-28)
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  • The future :: Nordkalk
    after 25 years Nordkalk is responsible for the after care work According to the requirements in the Swedish Environmental Code Nordkalk has pledged a security on the after care work This security initially totaled SEK 10 million and by the time the operations end it will total SEK 40 million Bunge fresh water reservoir would mean that the quarry is filled with water from the Bästeträsk lake to create a fresh water reservoir for producing drinking water The reservoir could supplement or replace Bästeträsk as a source of fresh water and be very valuable in terms of the long term water supply on Gotland The great depth of the Bunge quarry would allow for large volumes of water as well as a lower temperature than in Bästeträsk Today large volumes of water from Bästeträsk flow out into the Baltic during the winter During these periods the extra water could be pumped into the Bunge quarry without affecting the water level flow rate or other hydrological properties of Bästeträsk This would make it possible to fill up the Bunge quarry in a reasonable time frame and increase the water supply of the area considerably The Bunge fresh water reservoir would be integrated into the water supply network on Gotland which would require cooperation with local authorities Lake Bunge A common solution for restoring depleted quarries is to let them fill up with water This option would also restore the groundwater levels in the surrounding area A lake or pond is also usually perceived to be an esthetically pleasing solution It would take a very long time for the Bunge quarry to fill up with water the natural way and even then only the deepest parts of the quarry would be affected In order to maintain the water balance in the wetlands

    Original URL path: http://www.nordkalk.de/default.asp?viewID=2025 (2016-04-28)
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  • Environmental sustainability :: Nordkalk
    the company s operating conditions but also has a responsibility to ensure that the conditions make it possible to run a business This can mean issuing permits or upholding predictable rules but also regulations that support the use of all material flows Sustainability issues should always be put into perspective Lime is an environmental product that enables environmentally friendly and more sustainable production in many industries No alternative exists that is more environmentally friendly and can remove impurities from these processes The societal benefits of limestone based products far outweigh the effects on the areas used in the operations Nordkalk applies the international ISO standards for quality environmental and occupational health and safety management Our environmental management system defines the important environmental considerations and targets as well as how to implement and achieve them Our operations are monitored through annual external and internal environmental audits We publish an annual environmental report concerning our environmental efforts and their results Goals of Nordkalk s environmental work Reduction of CO 2 and other emissions into air and water Reduction of energy consumption and improvement of energy recovery Increasing material and resource efficiency Reduction of the use of fossil fuels by replacing them with biofuels and other alternative fuels An example worth mentioning is our plans for improved materials efficiency in the Bunge quarry New crushing and sorting equipment will be installed to process the limestone The new equipment will enable us to utilize a larger share of fines from the extracted limestone giving significant improvements in terms of material and resource efficiency Regional development fund Nordkalk is establishing a fund devoted to regional development in northern Gotland in conjunction with the commissioning of the Bunge Quarry Each ton of limestone quarried will generate income for the fund The aim is to reinvest these

    Original URL path: http://www.nordkalk.de/default.asp?viewID=2026 (2016-04-28)
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  • Sales :: Nordkalk
    BUNGE PROJECT CONTACT Nordkalk Limestone based solutions for industry agriculture and environmental care Contact Sales Marketing Purchasing Logistics Human resources Communications Countries addresses Feedback form Nordkalk Nordkalk Corporation CONTACT Sales Sales contacts Please visit the local sites for sales contacts

    Original URL path: http://www.nordkalk.de/default.asp?viewID=1115 (2016-04-28)
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