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INTERTEC <br />January 26, 2010 <br />Ms. Deb Bloom, City Engineer <br />City of Roseville <br />2660 Civic Center Drive <br />Roseville, MN 55113 <br />Re: Proposal to Conduct a Subsurface Investigation and <br />Amend the Voluntary Response Action Plan <br />Proposed Second Phase of Twin Lakes Roadways <br />Twin Lakes Parkway, Located West of Arthur Avenue <br />Roseville, Minnesota <br />Dear Ms. Bloom: <br />Braun Intertec Corporation Phone: 952.995.2000 <br />1 1001 Hampshire Avenue S Fax: 952.995.2020 <br />Minneapolis, MN 55438 Web: brauninlertec.com <br />Proposal BL-08-02387G <br />Braun Intertec has prepared this proposal to further evaluate subsurface conditions at the referenced <br />property (Site) as required by the Minnesota Pollution Control Agency (MPCA) as a condition of its <br />approval of a redevelopment workplan. <br />A redevelopment workplan, titled Voluntary Response Action Plan and Construction Contingency Plan <br />(VRAP/CCP), dated October 6, 2009, was submitted to the MPCA. However, the MPCA determined that <br />additional investigation of the Site was required before approval of the workplan could be granted, given <br />the incomplete investigation of the chlorinated solvent release on the neighboring PIK property to the <br />north. <br />We propose to complete the follow scope of work based on direction provided by the MPCA Voluntary <br />Investigation & Cleanup (VIC) Program in a letter dated December 29, 2009 and by the Petroleum <br />Brownfields (PB) Program in electronic correspondence dated January 8, 2010. Copies of the referenced <br />correspondence from the MPCA are attached. <br />Drilling Activities <br />We propose to complete the following direct-push (GeoprobeT"") soil borings at the Site: <br />■ 4 borings to a depth of 25 feet below existing grade along the proposed water main and <br />sanitary sewer utilities within Twin Lakes Parkway. <br />■ 2 borings to a depth of 25 feet below existing grade on the north side of the roundabout <br />located on the north end of Prior Avenue. <br />The borings will be performed using continuous sampling intervals to the termination depth of the <br />borings. The borings will be performed using a track-mounted GeoprobeT"^ drill rig. <br />Providing engineering and environmentad solutions since 1957 <br />