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January 11, 2010 <br />Minnesota Pollution Control Agency <br />520 Lafayette Road North 1 St.Paul, MN 55155-4194 I 651- 296 -6300 I 800- 675 -3843 1 651- 282 -5332 TTY I www.pca.state.mn.us <br />Mr. Andrew Witter <br />Anoka County Highway Department <br />1440 Bunker Lake Boulevard <br />Andover, MN 55304 -4005 <br />Dear Mr. Witter and Mr. Olson: <br />Mr. Brain Olson <br />City of Ramsey <br />7550 Sunwood Drive NW <br />Ramsey, MN 55303 <br />RE: Approval of Voluntary Response Actions for Petroleum Contamination <br />Site: Former Oasis Market, 14550 Armstrong Boulevard NW, Ramsey <br />Site ID#: LEAK00007470 <br />The Minnesota Pollution Control Agency (MPCA) Petroleum Brownfields Program (PBP) staff has <br />reviewed the following documents regarding your intent to investigate and manage all petroleum <br />contaminated soils for the project/property located at 14550 Armstrong Boulevard in Ramsey (the Site). <br />• "Response Action Plan and Construction Contingency Plan" dated November 16, 2009 <br />prepared by Braun Intertec. <br />• Leak site file LEAK00007470 and associated documents. <br />Based on the information provided, PBP staff are approving the above - referenced plan with the following <br />modifications: <br />1. Petroleum contaminated soils excavated at the site, at or greater than 200 parts per million (PPM) <br />(PID), should be properly managed at an MPCA approved off -site treatment/disposal facility. <br />2. Petroleum contaminated soils less than 200 PPM (PID) may be thin spread on -site under paved <br />surfaces. <br />3. Petroleum contaminated soils that exhibit PID headspace readings in "green space" areas should be <br />removed and properly managed as part of the development plan. A minimum four -foot buffer of <br />clean soil should exist in all "green space" areas, along with a vegetative cover. <br />4. Petroleum contaminated soils at or greater than 10 PPM (PID) encountered during the installation of <br />underground utilities should be removed and properly managed as part of the development plan. If <br />contamination remains at or above 10 PPM a vapor barrier is required. <br />5. Any petroleum contaminated soil removed from the site must be treated or disposed of in a method <br />approved by the MPCA. If petroleum contaminated soils are transported to a landfill, the landfill <br />must be appropriately permitted to accept petroleum contaminated soil. Petroleum contaminated soils <br />may be directly disposed in the landfill or used as alternative daily cover based on the landfill's <br />permit, industrial solid waste management plan, and /or local license. The applicant must notify PBP <br />staff where soils will be transported prior to treatment/disposal. Please include all transportation and <br />handling manifests for such soils within the final implementation report. <br />6. If on -site development occurs at the site in the future, a Response Action Plan should be submitted by <br />the developer and approved by the MPCA. <br />St. Paul I Brainerd I Detroit Lakes I Duluth I Mankato I Marshall I Rochester I Willmar I Printed on 100% post- consumer recycled paper <br />