ITEM 5 EXHIBITS A-H - Laserfiche WebLink

BLACK AVENUE RESIDENTIAL DEVELOPMENT 648-26-1 Page A-1 APPENDIX A: FIELD INVESTIGATION The field investigation consisted of a surface reconnaissance and a subsurface exploration program using hand-auger drilling equipment and 20-ton truck-mounted Cone Penetration Test equipment. Four 3-inch-diameter exploratory borings were hand-drilled on May 2, 2022, to depths of 2 to 4 feet. Five CPT soundings were also performed in accordance with ASTM D 5778-95 (revised, 2002) on May 2, 2022, to depths ranging from 37 to 43 feet. The approximate locations of exploratory borings and CPTs are shown on the Site Plan, Figure 2. Exploration logs, as well as a key to the classification of the soil, are included as part of this appendix. Boring and CPT locations were approximated using existing site boundaries, a hand-held GPS unit, and other site features as references. Boring and CPT elevations were not determined. The locations of the borings and CPTs should be considered accurate only to the degree implied by the method used. The CPT involved advancing an instrumented cone-tipped probe into the ground while simultaneously recording the resistance at the cone tip (qc) and along the friction sleeve (fs) at approximately 5-centimeter intervals. Based on the tip resistance and tip to sleeve ratio (Rf), the CPT classified the soil behavior type and estimated engineering properties of the soil, such as equivalent Standard Penetration Test (SPT) blow count, internal friction angle within sand layers, and undrained shear strength in silts and clays. A pressure transducer behind the tip of the CPT cone measured pore water pressure (u2). Graphical logs of the CPT data are included as part of this appendix. Attached boring and CPT logs and related information depict subsurface conditions at the locations indicated and on the date designated on the logs. Subsurface conditions at other locations may differ from conditions occurring at these boring and CPT locations. The passage of time may result in altered subsurface conditions due to environmental changes. In addition, any stratification lines on the logs represent the approximate boundary between soil types and the transition may be gradual. The locations of the borings and CPTs should be considered accurate only to the degree The locations of the borings and CPTs should be considered accurate only to the degree ed probe into the ground while ed probe into the ground while simultaneously recording the resistance at the cone tip (qsimultaneously recording the resistance at the cone tip (qc) and along the friction sleeve (f) and along the friction sleeve (f centimeter intervals. Based on the tip resistance and tip to sleeve ratio (Rcentimeter intervals. Based on the tip resistance and tip to sleeve ratio (R ehavior type and estimated engineering properties of the soil, such as ehavior type and estimated engineering properties of the soil, such as equivalent Standard Penetration Test (SPT) blow count, internal friction angle within sand equivalent Standard Penetration Test (SPT) blow count, internal friction angle within sand layers, and undrained shear strength in silts and clays. A pressure transducer behind the tiplayers, and undrained shear strength in silts and clays. A pressure transducer behind the tip the CPT cone measured pore water pressure (uthe CPT cone measured pore water pressure (u22). Graphical logs of the CPT data ). Graphical logs of the CPT data Attached boring and CPT logs and related information depict subsurface conditions at the Attached boring and CPT logs and related information depict subsurface conditions at the locations indicated and on the date designated on the logs. Subsurface conditions at other locations indicated and on the date designated on the logs. Subsurface conditions at other locations may differ from conditions occurring at these boring and CPT locations. The passage locations may differ from conditions occurring at these boring and CPT locations. The passage of time may result in altered subsurface conditions due to environmental changes. In addition, of time may result in altered subsurface conditions due to environmental changes. In addition, any stratification lines on the logs represent the approximate boundary between soil types and any stratification lines on the logs represent the approximate boundary between soil types and the transition may be gradual.the transition may be gradual.