Agenda - Environmental Policy Board - 10/15/2018

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19.4). Both sites were part of the Minnesota Pollution Control Agency's (MPCA) Leaking Underground Storage Tank (LUST) Cleanup Program. Brook's Food Store (LUST #7470) at 14550 Armstrong Boulevard Northwest was added to the LUST database in 1994 due to a release of unleaded gasoline. Custom Coaches (LUST #1042) at 6845 Highway 10 North was added to the LUST database in 1989 after a release of gasoline. Both sites were closed as of 1997. Within the project area, there is an active site in the MPCA's Voluntary Investigation and Cleanup (VIC) program (Figure 19.4). The site is located on the corner of Ramsey Boulevard and Highway 10, and is identified as VP8480. In July 1963, a railcar accident resulted in the release of powdeied lead arsenate. There was also a report of several barrels, possibly containing lead arsenate, being buried at this same location at a later, unspecified, date and then removed. An electromagnetic induction survey indicated three disturbed areas in the subsurface that could be burial locations. Burlington Northern Santa Fe (BNSF) has no record of the burial of any items. From soil boring investigations, the extent of arsenic contamination is 350 feet long and 40 feet wide (Figure 19.4). The Minnesota Department of Health (MDH) and the United States Environmental Protection Agency (USEPA) determined the maximum contaminant level (MCL) for arsenic in drinking water to be 50 parts per billion (ppb). In the 1990's the limit was reviewed and changed to 10 ppb. The new regulation does not go into affect until 2006. Groundwater samples were collected from monitoring wells at the spill site and from several residential wells near the spill. Soil samples were taken at varying depths from soil borings at the spill site. Of forty-two soil samples taken from 1998-2000, eight were over current MCL for arsenic. Groundwater samples were taken from six monitoring wells in 2000, and all six were over the current limit. In 2001, only one of these wells was over the MCL. Sample collection methods in 2001 differed from those used in 2000. The only arsenic level that exceeded the present MCL in a sampled residential well was to the north of this site. Because groundwater flow is to the south, the BNSF site is not thought to be the source of arsenic in that well. A supplementary Phase II investigation has been completed for this site and is under review by the MPCA. BNSF indicated its intent to remove the contaminated soils prior to the construction of the Burger King restaurant, parking lot, and stormwater detention pond. BNSF currently has plans to remove the contaminated soils in the summer of 2003. BNSF and the MPCA should be notified prior to any earth moving activities. The project representative for the MPCA is Karen Kromar, who can be contacted at (651) 297-3080. The BNSF representative is Mike Woolridge, who can be contacted at (763) 782-3483. Thomas Dahl, of Retec, performs environmental testing for BNSF at this site and can be contacted at (651) 222-0841. BNSF hauls hazardous materials along the tracks that adjoin RTC. There has been only one known derailment of hazardous materials on the site over the past 40 years, as 20-2