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1 <br />' December 9, 1977 <br />' <br />A. INTRODUCTION: <br />A.1. Purpose: The purpose of the investigation was to <br />' <br />provide soils and groundwater information pertinent to <br />construction of the proposed house. <br />A.2. Scope: Two standard penetration test borings (ST-1 <br />and ST-2) were put down in the northwest and southeast <br />corners of the proposed building area, respectively. The <br />' <br />boring locations are shown on the attached sketch. <br />A.3. Available Information: You provided us with a loca- <br />tion of the proposed site Juring a phone conversation held <br />with you on November 23, 1977. During this conversation, <br />you also indicated that the four corners of the proposed <br />building area were delineated by steel pins. <br />' <br />A.4. Borin& Locations: The borings were located based on <br />the verbal information submitted to us, and are shown on the <br />attached sketch. The ground surface elevations at the <br />borings are referenced to the center of the cul-de-sac <br />of Eileen Street, which was assigned datum elevation 100.0. <br />' <br />A.S. Field Testing $ Sampling: The borings were taken on <br />December "5, l977, wit a truck -mounted core and auger drill <br />in accordance with ASTM D1586 "Penetration Test and Split <br />' <br />Barrel Sampling of Soils". Using this method, the bore hole <br />is advanced with the hollow -stem auger to the desired test <br />depth. Then a 140-pound hammer falling 30 inches drives a <br />standard 2-inch OD split barrel sampler a total penetration <br />' <br />of 1� feet below the tip of the hollow -stem auger. The <br />blows for the last foot of penetration are recorded and are <br />an index of soil strength characteristics. Soil samples <br />' <br />were generally taken at 24-foot increments to the 15-foot <br />depth and at S-foot increments to the termination depth in <br />each of the borings. Use of the hollow -stem auger eliminated <br />the driving of casing and the need for jetting water. <br />A.6. Soil Classification: Mineral soils encountered in the <br />borings were visually amanually classified in the field <br />' <br />by the crew chief in accordance with ASTM D2487 "Unified <br />Soils Classification System" and ASTM D2488 "Recommended <br />' <br />Practice for Visual and Manual Description of Soils". A <br />copy of ASTM D2487 is attached. All samples were then <br />returned to the laboratory for verification of the field <br />classifications by a Soils Engineer. Representative samples <br />will remain in this office for a period of 60 days to be <br />available for your examination. <br />A.7. Groundwater Level Measurements: 'fhe bori <br />probed for the presence oT groundwater prior to <br />diate g following withdrawal of the hollow -stem <br />Groun water was not encountered in either boring *ENGINEERING TESTING <br />