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100208_Packet
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100208_Packet
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Minnesota Pollution Control Agency <br />520 Lafayette Road North � St.PauI,MN 5 5 1 5 5-41 94 � 651-296-6300 � 800-675-3843 � 651-282-5332 TTY � www.pca.state.mn.us <br />December 29, 2009 <br />Ms. Debra Bloom <br />City of Roseville <br />2660 Civic Center Drive <br />Roseville, MN 55113 <br />RE: Twin Lakes Roadways Construction — Second Phase <br />MPCA Project Number VP4674 <br />Technical Assistance Letter <br />Dear Ms. Bloom: <br />The Minnesota Pollution Control Agency (MPCA} staff in the Voluntary Investigation and <br />Cleanup (VIC) Unit has reviewed the documents submitted for the Twin Lakes Roadways <br />Construction — Second Phase site located in Roseville (the Site). The documents reviewed <br />(Site Documents) include the following: <br />1. "Subsurface Evaluation," prepared by Braun Intertec (Braun), dated May l, 2009; <br />2. "Voluntary Response Action Plan and Construction Contingency Plan," prepared <br />by Braun, dated October 6, 2009; <br />3. "Report of Phase II Environmental Site Assessment," prepared by American <br />Engineering Testing, Inc. (AET), dated September 16, 2005; and <br />4. MPCA Site correspondence files. <br />Historically, the Site was used as agricultural land until development of maintenance and <br />terminal facilities in the mid-1950's to 1960's. The Site is currently being developed with the <br />second phase of the Twin Lakes Roadways Project, a section of Twin Lakes Parkway <br />between Mountain Ridge Road and Prior Avenue, and the reconstruction of Prior Avenue <br />from Twin Lakes Parkway south to county Road C. This phase of the development will <br />include sidewalks, medians, a roundabout, and underground utilities including water mains, <br />sanitary sewer, and storm water sewers that route back to the storm water retention system. <br />Water conserving planting beds will also be constructed. The roadway is being developed as <br />a precursor to future development at surrounding parcels in the area. <br />Several investigations that have been completed in the area indicate chlorinated solvents and <br />petroleum VOCs are present in soil, perched groundwater, and water table aquifers; in the <br />area of the proposed roadway. The 2005 (AET) investigation indicated very high <br />concentrations of trichloroethene (110,000 ug/1) was present in the perched groundwater on <br />the PIK parcel, just to the north of the proposed roadway. Because there is currently not a <br />volunteer, the PIK parcel will be referred to the MPCA's Site Assessment Unit for possible <br />future investigation and response action. <br />St. Paul � Brainerd � Detroit Lakes � Duluth � Mankato � Marshall � Rochester ( Willmar � Printed on 100°� post-consumer recycled paper <br />
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