3003 W CASINO RD BLDG 45-12 2016-10-20

APPENDIX A Field Explorations Methods and Analysis Explorations and Their Locations The exploration logs in this appendix show our interpretation of the drilling,sampling, and testing data. These logs indicate the approximate depth where the soils change. Note that the soil changes may be gradual and may vary in depth across the site. In the field,we classified the soil samples according to the methods shown on Figure A-1-Key to Exploration Logs. This figure also provides a legend explaining the symbols and abbreviations used on the logs. Figure 2 of the report shows the exploration locations,which were located using a portable GPS unit. The ground surface elevation at this location was interpreted from a site plan with elevation contours provided to us by Coffman Engineers, Inc. The accuracy of the exploration location and elevation data depends on the accuracy of the measuring method. Mud-rotary Borings Ten mud rotary, designated HC-1 through HC-10,were drilled to depths between 30 and 120 feet bgs between May 4 and 12, 2015. The borings were drilled using an approximately 4-inch-outer-diameter, solid-stem mud rotary auger assembly advanced with a truck-mounted drill rig subcontracted by Hart Crowser and operated by Cascade Drilling. The drilling was continuously observed by an engineer from Hart Crowser. Detailed field logs were prepared for each boring. Using the standard penetration test,we obtained samples at 5-to 10-foot-depth intervals. The boring logs are included as Figures A-2 through A-11 at the end of this appendix. Standard Penetration Test (SPT) Procedures The SPT is an approximate measure of soil density and consistency. To be useful,the results must be interpreted in conjunction with other tests. The SPT(as described in ASTM D 1586)was used to obtain disturbed soil samples. This test employs a standard 2-inch-outside-diameter,split-spoon sampler. Using a 140-pound automatic hammer free-falling 30 inches,the sampler is driven into the soil for 18 inches. The number of blows required to drive the sampler the last 12 inches is the Standard Penetration Resistance. This resistance, or blow count, measures the relative density of granular soils and the consistency of cohesive soils. The blow counts are plotted on the boring logs at their respective sample depths. Sample S-16 of boring HC-4 was completed with a larger Dames and Moore (D&M)split spoon sampler with an outer diameter of 3-inches. Blow count procedures followed were equivalent. Generally, D&M blow counts can be correlated to SPT blow counts be dividing by 2. SM 19106-01 HMrOZOwW-A May 29,2015