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42. A field log of each boring was prepared by the HG'S drill crew. The logs contained visual classifications of the soil materials encountered during drilling, as well as the driller's interpretation of the subsurface conditions between samples and water observation notes. The final boring logs included with this report represent an interpretation of the field logs and include modifications based on visual/manual method observation of the samples. The soil boring logs, general terminology for soil description and identification, and classification of soils for engineering purposes are also included in the appendix. The soil boring logs identify and describe the materials encountered, the relative density or consistency based on the Standard Penetration resistance (N -value, "blows per foot") and groundwater observations. The strata changes were inferred from the changes in the samples and auger cuttings. The depths shown as changes between strata are only approximate. The changes are likely transitions, variations can occur beyond the location of the boring. 3.0 RESULTS 3.1 Soil Conditions The soil borings encountered about 1 foot of topsoil at the surface. The topsoil consisted of sandy lean clay that was black in color. Beneath the topsoil, the borings encountered native alluvial lean clay soils that extended to around 4 feet below the ground surface. Penetration resistance values (N -values), shown as blows per foot (bpf) on the boring logs, of 8 blows per foot (bpf) were recorded in the lean clays which indicate a medium consistency. Underlying the topsoil and alluvial clay soils, the soil borings encountered glacial till soils that extended to the boring termination depths of about 40 feet. The glacial till soils consisted mainly of clayey sand, with upper layers of sandy lean clays and lean clays encountered at boring SB -1. N -values of 10 to 26 bpf were recorded in the glacial till soils. These values indicate the clayey sands had a medium dense relative density with upper loose zones while the sandy lean clays/lean clays had a stiff consistency. 3.2 Groundwater Groundwater was encountered in both soil borings after drilling between depths of about 31 % to 34 feet which correspond to elevations of about 936 to 938. Water levels were measured on the dates as noted on the boring logs and the period of water level observations was relatively short. Given the cohesive nature of the glacial till soils encountered, it is likely that insufficient time was available for possible perched groundwater to seep into the bore hole and rise to its hydrostatic level. The Minnesota DNR reports the Ordinary High Water Level (OHW) of Lake Minnetonka to be around an elevation of 929 % feet. 3