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STOAI~"') Stork Twin City Testing Corporation Materials Technology Proposed New Residence at 1635 Bohns Point Road Orono, Minnesota Stork Twin City Testing Corporation Project #TCT006405P Page 8 of 11 In our opinion the final lowest floor slab elevation should be a minimum of 4' above the highest recorded water level elevation at the site. We recommend that a vapor barrier be placed beneath the floor slab. The vapor barrier edges should be taped with the barrier at the perimeter walls to run vertically up the walls prior to slab placement. This vapor barrier is recommended to minimize water vapor migration through the floor slab concrete. Water vapor can adversely affect floor coverings proposed for the residence. We recommend an interior and exterior drain tile system be installed to pick up groundwater moisture from beneath the slab. The drain tile system should be installed below floor grade on the outside and inside of the foundation wall and should be surrounded by at least six inches of washed, coarse aggregate material which is enveloped in a geotextile fabric. We also recommend some lateral runs of draintile be installed in general floor slab areas. The drain tile should be connected to a suitable outfall or sump where water can be discharged from the system. We are including a typical exterior drain tile system sketch attached to this report. The foundation walls should also include a water-proofing system to prevent water infiltration into the slab-on- grade subgrade soil. 4.5 Underground Utilities The soils encountered in the borings near the surface may require some reworking to support typical buried utilities. If loose/soft soils are encountered in the bottom of utility trenches, some subcutting or recompaction of the soils will be required. This may include subcutting to allow for placement of geotextile fabric and 1' of compacted utility bedding. Fill placed as utility bedding should be either crushed rock or clean, well- graded granular soil. Due to the high water table as depicted by the soil boring, dewatering will more than likely be required during utility construction to the new structure. Information and statements in this report are derived from maleriat, information and/or spcclflcanons rumished by the client and exclude any ex.pressed or implied warranties as to tile fitness of the material tested or analyzed for any particular purpose or use. This certificate or report is the conlidenUa! property of our client and may not be used for advertising purpose:s. This certificate or report shall not be reproduced except in full, wilhout wnlten approval of this taboralory and shall be signed or olhei-wlse approved by aulhorized staff members only. The recording of false. fictitious or rrau<tulent statements or entrtes on this document may be punished as a felony under Federal Statues including Federal Law TILie 18, Chapter 47. This doc:ument conlalns technical da1a whose export and re-export/re-transfer is ~ubjecl lo control by the U.S. Oepar1ment ot Commerce under lhe Export Administration Acl and the EXpOrt Administration Regulaticms. TI1e depanment of Commerce's prior writtt'!n approval Is required for lhe export or re.exportlre- lransfer of such technical information to any foreign pere:on, foreign enUly or foreign organization whether in U,a UnUed states or abroad. EAR~CONTROLLED DATA.