3410 TERMINAL AVE 2018-03-09 - Laserfiche WebLink

1 SHANNON N M,'1 I.SfN.INC. ' (USCS)symbol of each geologic layer. It also includes the natural water content(where tested), penetration resistance, and various depths within the boring log where tests were performed. Other information shown in the boring logs includes ground surface elevation, types and depths of sampling, descriptions of obstructions and debris encountered in the borings, and observed drilling problems and soil behavior related to caving,raveling, and heave. A soil classification ' and log key for the boring logs is presented in Figure A-1 (Appendix A). For all borings,the cuttings and drill mud were transferred into drums. Representative samples ' from each drum were taken by a Shannon&Wilson, Inc. representative, submitted to a laboratory, and tested for diesel/heavy oil range organics and Model Toxics Control Act 5 metals. Results of these tests will be provided under separate letter. 3.1.1 Soil Sampling Soil samples from the geotechnical borings were obtained in conjunction with the Standard Penetration Test(SPT) at the depths shown in the boring logs. SPTs were performed in ' general accordance with ASTM International (ASTM) Designation: D1586, Standard Method for Penetration Testing and Split-Barrel Sampling of Soils (ASTM, 2009). SPTs were generally performed every 5 feet to the bottom of the borehole. The SPT consists of driving a 2-inch- outside diameter, split-spoon sampler a distance of 18 inches into the bottom of the borehole with a 140-pound hammer falling 30 inches. The number of blows required for the last 12 inches of penetration is termed the Standard Penetration Resistance(N-value). These values are plotted at the midpoint of the sample depths on the boring logs. Generally, whenever 50 or more blows were required to cause 6 inches or less of penetration, the test was terminated, and the number of ' blows and the corresponding penetration were recorded. The N-value is an empirical parameter that provides a means for evaluating the relative density, or compactness, of granular soils and i the consistency, or stiffness, of cohesive soils. 4.0 LABORATORY TESTING Laboratory tests were performed on selected soil samples retrieved from the geotechnical borings. The laboratory testing program included tests to classify the soils and to provide data for engineering studies. Soil samples recovered from the borings were visually reclassified in our laboratory using a ' system based on ASTM Designation: D2487, Standard Test Method for Classification of Soil for Engineering Purposes, and ASTM Designation: D2488, Standard Recommended Practice for Description of Soils(Visual-Manual Procedure). This visual classification method allows for ' 21-1-21962-003-R2.docx/wp/cp 21-1-21962-003 3