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Geotechnical Engineering Report lrerracon <br /> Carr Aggregate Pit ■ Carr, Colorado <br /> April 23, 2020 ■ Terracon Project No. 20195087 GeoReport. <br /> Our exploration team prepared field test pit and boring logs as part of standard field operations <br /> including sampling depths, penetration distances, and other relevant sampling information. Field <br /> logs included visual classifications of materials encountered during drilling/excavation, and our <br /> interpretation of subsurface conditions between samples. Final logs, prepared from field logs, <br /> represent the geotechnical engineer's interpretation, and include modifications based on <br /> observations and laboratory test results. <br /> Property Disturbance: We backfilled borings with auger cuttings after completion. Our services <br /> did not include repair of the site beyond backfilling our boreholes. Excess auger cuttings were <br /> dispersed in the general vicinity of the boreholes. Test pits were backfilled with excavated <br /> materials and compacted with the excavator bucket. Because backfill material often settles below <br /> the surface after a period, we recommend checking boreholes and test pits periodically and <br /> backfilling, if necessary. <br /> Laboratory Testing <br /> The project engineer reviewed field data and assigned various laboratory tests to better <br /> understand the properties of various soil and bedrock strata. Laboratory testing was conducted in <br /> general accordance with applicable or other locally recognized standards. Procedural standards <br /> noted in this report are for reference to methodology in general. In some cases, variations to <br /> methods are applied as a result of local practice or professional judgement. Testing was <br /> performed under the direction of a geotechnical engineer and included the following: <br /> ■ Visual classification ■ Moisture content <br /> ■ Grain-size analysis ■ Atterberg limits <br /> ■ LA abrasion <br /> Our laboratory testing program includes examination of soil samples by an engineer. Based on <br /> the material's texture and plasticity, we described and classified soil samples in accordance with <br /> the Unified Soil Classification System (USCS). Soil and bedrock samples obtained during our <br /> field work will be disposed of after laboratory testing is complete unless a specific request is made <br /> to temporarily store the samples for a longer period of time. <br /> Bedrock samples obtained had rock classification conducted using locally accepted practices for <br /> engineering purposes. Boring log rock classification is determined using the Description of Rock <br /> Properties. <br /> Responsive■ Resourceful ■ Reliable EXPLORATION AND TESTING PROCEDURES 2 of 2 <br />