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Subsurface Exploration Summary <br />NTI performed the subsurface exploration program on May 22, 2014 with a two-person crew and <br />a truck-mounted CME-55 drill rig. Samples were generally collected in accordance with ASTM <br />D1586 “Standard Test Method for Standard Penetration Testing (SPT) and Split-Barrel Sampling <br />of Soils.” <br />The boring locations and depths were determined by NTI. Boring locations were staked in the <br />field by a representative of NTI. The borings terminated at a nominal depths of 10 to 20 feet <br />below the existing ground surface. The City of Ramsey provided ground surface elevations at <br />each of the soil boring locations. <br />Soil Conditions <br />Bituminous pavement thickness along the existing roadways ranged from 1 ½ to 2 inches in the <br />soil borings. Aggregate base thickness ranged from 2 to 3 inches. Previously placed fill soils <br />generally consisting of sand (SP), silty sand (SM), clayey sand (SC), and sandy clay (CL) were <br />encountered below the pavement section. The relative density of the granular fill throughout the <br />project area was generally very loose to medium dense. The clay-based fill generally had a <br />medium consistency. <br />Native alluvial sand (SP) and clay (CL) were observed at boring termination depths. <br />Several non-typical conditions were also observed in several borings. Fill consisting of sandy <br />clay with trace organics was encountered in SB-1 ranging from 0 to 2 feet below pavement <br />section. The silty sand (SM) fill soil was wet from 2 to 4 feet below the ground surface boring <br />SB-2. The underlying native clay (CL) below the silty sand fill was generally soft. <br />Soft to medium high plasticity clay (CH) layers were encountered below the previously placed <br />fill in soil boring SB-2 from 11.5 feet to as much as 17 feet below existing grade. The <br />consistency of this material was soft. Table 2 summarizes the subsurface conditions for the <br />borings in the existing paved roadways. <br />th <br />Table 2: Subsurface Summary: Garnet Street & 168 Avenue <br />BituminousAggregate <br />Pavement BaseFillNativeDepth of <br />BoringThicknessThicknessSubgradeSubgradeUnsuitable Soil <br />No.(inches)(inches)MaterialMaterial(feet) <br />1 1 ½ 2 CL, SP SP 2 <br />2 2 2 SM CL, CH, SP N/E <br />3 2 2 SC SM, CL N/E <br />4 2 3 SC, SM SP-SM, CL N/E <br />* <br />N/E = Not Encountered <br />2 <br /> <br />