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Attachment 1 NARRATIVE FOR AN INTERIM USE PERMIT This permit application is to obtain permission from the City of Roseville to install a structure required to store a 285 gallon holding tank for the purpose of remediating a groundwater contamination plume at the Ica Station, 1681 Rice Street, Roseville, Minnesota (figure 1). The contamination was the result of a leaking underground storage tank which was removed when the convenience store and gas station was re- built in 1989. During the reconstruction of the site, a drain tile system was installed within the contaminated perched aquifer to drain the contaminated groundwater to the southeast corner of the property (figure 2). A sump was installed to receive the wasterwater with the intention to discharge the wastewater to the nearest sanitary sewer manhole. As part of the groundwater treatment system, the wastewater must be retained for a minimum of thrity minutes before it is discharged to the sanitary sewer. A 285 gallon tank will be used to retain the wastewater. A 7 foot long by 4 foot wide by 4 foot high structure is necessary to enclose the tank to prevent freezing and to improve the aesthetics of the system (figure 3). The structure exterior will blend in with the cream colored brick on the station building. The materials will be approved by the fire marshall since the tank will be holding volatile constituents. The most convenient location for the above described structure is within the 3D-foot eastern property boundary line (figure 2). Since the sanitary and electrical hook-ups have already been installed near the sump, this is the best location for the holding tank. The length of time this stucture will be necessary is unknown, however it could extend for a number of years. The goal is to clean up the contamination as soon as possible in the most efficient manner.