7.4.A. SR 05-16-1994 - Laserfiche WebLink

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e e e "'J ~1 Page 2 January 21, 1994 any evidence of volatile organic compounds (VOCs) in either well. Lead was present slightly above the recommended allowable limit (RAL) for drinking water, however, based on available data collected to date, Liesch does not believe this is associated with the Custom Motors operation. To mitigate environmental concerns on the Custom Motors parcel, several items must be considered. 1. Work completed by Liesch was a screening effort to identify possible problem areas and does not delineate the comlpete areal extent of contamination. Fu...rther work is needed to accomplish this. 2. Custom Motors has implemented several management practices to reduce environmental problems but it appears additional items should be considered. These incl ude the use of concrete pads to retain vehicle fluids, conducting certain operations under roof, preventing run on into vehicle disassembly areas and other methods to prevent vehicle fluid loss. 3. Some soil and possibly limited groundwater remediation may be necessary to achieve environmental standards for residential development. The Minnesota Department of Health has recently established a soil lead level of 300 mg/kg for residential areas. Data from Liesch's work suggests soil lead levels in some areas of the site significantly exceed this value (up to 9400 mg/kg near the garage). Implementation of additional containment measures, further soil assessment and limited soil clean-up at this time would minimize further contamination and provide expectations of meeting the goal of possible residential use for the Property. maw:ENV/64102/memo12l94.wp \. B.A. LIESCH ASSOCIATES. INC. 13400 15TH AVENUE NORTH MINNEAPOLIS. MINNESOTA 55441