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. 'Qed \2./n/o \ Minnesota Pollution Control Agency~ 1:;-"";;;;-~';M*~~-;'.m~~M.=.~!n:>;U,"'O~""~(~~>*,'iW:'~>~_~~=~;:i;i>'4~:0%~""'''''''~'''w=;~,~___,.o~'o ""'f'""f-', 1i"""+>~~_""=~-/...,*,;iF:<i~__,. December 10, 2001 Mr. Dennis Welsch City of Roseville 2660 Civic Center Drive Roseville, MN 55113 RE: Centre Point Business Park EA W Dear Mr. Welsch: The staff of the Minnesota Pollution Control Agency (MPCA) has reviewed the Environmental Assessment Worksheet (EA W) for the proposed Centre Point Business Park. We offer the following comments for your consideration as you make a determination on the need for an Environmental Impact Statement (EIS). Item 8 - Permits and Approvals Needed The EA W incorrectly lists the National Pollutant Discharge Elimination System/State Disposal System (NPDES/SDS) General Stormwater Permit for Construction Activity (Permit) for this project as not applicable, Any project that disturbs five or more acres of land is required to obtain a Stormwater Permit. Also, if a project is less than five acres, but is part of a larger common plan of development or sale that is greater than five acres (where multiple separate and distinct construction activities may be taking place at different times on different schedules but under one plan), it is defined as "five or more acres ofland", This means that-this project will need to obtain a NPDES Pennit from this agency. Item 17 - Water Quality - Surface Water Runoff The EA W identifies a stormwater pond located just to the south of the site as the pond that will handle the site's runoff. Under other items in the EA W, there is reference to eight ponds that were created in 1985 when initial construction work took place on the site. These ponds were created prior to the issuance of NPDES Stann water Permits for construction activity, which the MPCA started requiring in January of 1994. The Stormwater Permit requires that any project which creates more than one acre of new impervious surface must discharge their storm water runoff into a wet-sedimentation basin prior to discharge into waters of the state, The permit contains design criteria and settling velocity requirements for the ponds, For smaller storm events these requirements can be the controlling factor in the design of the outlet structure so that the pond meets the permit requirements. It is unlikely that the ponds that were created in 1985 will meet these requirements. For more information on permit requirements pJease call Mike Findorff at (651) 296-6798, 520 Lafayette Rd. N,; St. Paul, MN 55155-4194; (651) 296-6300 (Voice); (651) 282-5332 (HY) St. Paul . Brainerd . Detroit Lakes . Duluth . Mankato . Marshall . Rochester · Willmar; www.pca.state.mn.us Equal Opportunity Employer' Printed on recycled paper containing at least 20% fibers from paper recycled by consumers,