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stay in effect until the construction proiect is complete. the entire site has undergone Final <br />Stabilization. and an NOT has been submitted to the MPCA. Once the identity of the responsible <br />party is known. the SWPPP must be amended to include this information. <br />(111Training documentation: The knowledgeable person(s) named in the SWPPP shall be trained in <br />accordance with the current General Construction Stormwater Permit reauirements. <br />Section 117-390 (10) is hereby amended as follows (additions indicated as underline. deletions indicated <br />as sic thro igh : <br />(10) Precautions to be taken to contain sediment when working in or crossing water bodies. <br />Section 117-391 (6) a. is hereby amended as follows (additions indicated as underline. deletions indicated <br />as strike throughl: <br />a. Unless precluded by moderate or heavy snow cover (Mulching can take place if a light snow <br />cover is present.), stabilize all exposed inactive disturbed soil areas within 100 feet of any water <br />of the state, or within 100 feet any conveyance (curb, gutter, storm sewer inlet, drainage ditch, <br />etc.) to a water of the state with sod, seed or weed free mulch. This must be done, if the <br />developer will not work has not worked the area for seven days on slopes greater than three <br />feet horizontal to one foot vertical (3:1), 14 days on slopes ranging from 3:1 to 10:1 and 21 <br />days for flatter slopes. <br />Section 117-392 is hereby amended as follows (additions indicated as underline, deletions indicated as <br />sic thi ighA: <br />(a) The applicant shall install, construct, or pay the city fees for all stormwater management facilities <br />necessary to manage increased runoff from development. , so that the disc a go maz from stogy -tra r <br />trcatmci.t 1-,;•ilitu, for the predevelopment 2, 10 arri 100 year pxtk- z%rti dizchargc rates arc not <br />increased. Hydrologic and hydraulic design calculations must be submitted for the pre -development <br />and post -development conditions for the 2. 10. and 100 year events as well as the 10 day snow melt <br />event. Such calculations shall include: (i) description of the design storm freauencv. intensity and <br />duration. (ii) time of concentration. (iii) Soil Curve Numbers or runoff coefficients. (iv) peak runoff <br />rates and total runoff volumes for each watershed area. (v) infiltration rates. where applicable. (vi) <br />culvert capacities. (vii) flow velocities. (viii) data on the increase in rate and volume of runoff for the <br />design storms used. and (ix) documentation of sources for all computation methods and field test <br />results. These predevelopment rates shall be based on the last ten years of how that land was used. <br />Accelerated channel erosion must not occur as a result of the proposed land disturbing or development <br />activity. An applicant may also make an in -kind or a monetary contribution to the development and <br />maintenance of community stormwater management facilities designed to serve multiple land <br />disturbing and development activities undertaken by one or more persons, including the applicant. <br />(b) All calaalntiorra and inforuat�n azcd in dcLx iinirr tkcsc pxtk z%rrri discharge tutu, ta1 b� <br />Gubmittod akwg Et/Dram-Au iei dxi. voirima flcut Sizing of stormwater basins shall be based <br />upon: <br />(1) For basins that are not land locked — Available storage volume shall be based on 100-vear return <br />period (7.1 inch Atlas 14. Anoka County). 24hr duration. SCS Type II storm with average soil <br />moisture conditions (AMC 2) <br />(2) For land locked areas — Available storage volume shall be established by estimating the surface <br />elevation resulting from a 100 year/ 10-dav runoff or 100 year/10-day snowmelt. whichever is more <br />