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2008-10-28_PWETC_AgendaPacket
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2008-10-28_PWETC_AgendaPacket
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3/26/2010 2:28:07 PM
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Commission/Committee
Commission/Authority Name
Public Works Commission
Commission/Committee - Document Type
Agenda/Packet
Commission/Committee - Meeting Date
11/25/2008
Commission/Committee - Meeting Type
Regular
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Dredged Materials Management -Minnesota Pollution Control Agency <br />Page 2 of 10 <br />Rules chs. 7050 and 7060. The MPCA also reserves the right to require a Perrnittee to <br />apply for and obtain an individual NPDES/SDS permit for dredging activity. <br />Additional Detailed Information <br />The management guide referenced on this Web page details the requirements for managing <br />dredged materials in the State of Minnesota, and contains all the specific information you <br />will need to determine what sampling and analysis is required, whether a permit is required, <br />and how dredged material must be managed (treatment, storage, disposal and use/reuse <br />requirements). <br />. ~_Managing_Dredged Materials in the State of Minnesota <br />A fact sheet containing a brief regulatory guide and Best Management Practices (BMPs) for <br />the management of dredged material has also been prepared. <br />. ~ Best Management Practices for the Management of Dredged Materials <br />What Analysis is Required? <br />In order to determine the most appropriate management method for dredged material, an <br />evaluation of the reasonable likelihood for a given pollutant to be present in the material <br />must be made. A determination as to whether a pollutant has `reasonable likelihood' is <br />done through a combination of empirical and technical evaluation of the sediment to be <br />dredged, which may include sampling and analysis. <br />Characterization of sediment from the proposed dredge site must be completed prior to <br />initiation of dredging activity. The minimum number of samples required is based on the <br />total amount of material to be removed; the analysis must be conducted on samples that are <br />representative of, and in consideration of the dredged material and activities at the project <br />site. At a minimum, the number of samples to be collected at a proposed dredge site is <br />specified in the table below. <br />Minimum Number of Samples for Sediment Characterization and Evaluation. <br />Volume Planned <br />for Removal, yd3 Number of Core Sample Sites <br />0-30,000 3 <br />30,000-100,000 5 <br />100,000-500,000 6 <br />500, 000- <br />1,000,000 8 <br />>1,000,000 >8 <br />The following methods are used in evaluating the proposed dredging material: <br />Grain size analysis; <br />Past industrial activities/sources of pollutants; and, <br />Sampling and analysis of pollutants likely to be present. <br />http://www.pca.state.mn.us/water/dredgedmaterials.html 11 /20/2008 <br />
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