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Brookview Estates Reconstruction <br />Ramsey, Minnesota <br />NTI Project No. 18.MSP06855.000 <br />Table 1: Pavement and Subgrade Summary' <br />Bituminous Apparent <br />Pavement Aggregate Base Fill Subgrade Native Subgrade <br />Boring No. Thickness2 (inches) Thickness3 (inches) Material4 Material 5 <br />SB-1 4 % 5 SC SM <br />SB-2 2 1/4 4 SP-SM SP <br />SB-3 4 % 4 SM SM <br />SB-4 4 1/2 5 SP-SM SP-SM <br />SB-5 5 6 SM SP-SM <br />SB-6 5 6 SM SM <br />SB-7 4 % 6 SM CL <br />1. Table summary is a generalization of subsurface conditions at the individual soil boring locations only. <br />They may not reflect variations in subsurface strata occurring on site between boring locations. The <br />general geologic origin of retained soil samples is listed on the boring logs. <br />2. Measured thickness of the pavement core. <br />3. Apparent aggregate base thickness, at time of our fieldwork, by visual inspection only and is not meant <br />to confer conformance with DOT specifications. <br />4. Undocumented fill soils were encountered immediately under the aggregate base. <br />5. The native soils underlying the undocumented fill soils. <br />2.1 Groundwater and Groundwater Control <br />Groundwater was observed at the time of drilling. Groundwater was observed in four of the seventeen <br />boreholes the Interstate Area ranging from depths of approximately 6.5 to 8.0 feet below the top of <br />pavement. The lack of observed groundwater at the remaining boring locations may be due to the <br />short duration for which the boreholes remained open combined with the low permeability of the on - <br />site clay and silt based soils. In addition, the on -site clay and silt based soils have the potential to be <br />somewhat impervious and conducive to the development of zones of perched water at varying <br />elevations and locations across the project area. <br />2.2 Laboratory Test Program <br />Our analysis and recommendations of this report are based upon our interpretation of the standard <br />penetration test resistance determined while sampling soils, laboratory test results, and experience <br />with similar soils from other sites near the project. The results of such tests are summarized on the <br />boring logs or attached laboratory test reports. <br />Page 2 of 7 <br />