1. A cased borehole was advanced to the stratum to be tested 

 and carefully cleaned out to assure that no loose soil 

 particles were left in the hole. 



2. A 2-in. O.D. split-spoon sampler was driven below the 

 bottom of the casing to obtain a sample of the soil to 

 verify the stratum in which the test would be performed. 



3. Then, either the casing was advanced to the bottom of the 

 zone to be tested and again completely cleaned out, or the 

 hole was advanced to the bottom of the test zone, below 

 the bottom of the casing, and carefully cleaned out using 

 a 2-7/8 in. O.D. roller bit. 



4. After sounding the bottom of the hole to verify that the 

 soil was either flush with the bottom of the casing or at 

 the desired distance below the bottom of the casing, 

 enough Ottawa sand was poured down the casing to fill the 

 designated test area. 



5. Where the casing was flush with the bottom of the hole, 

 the casing was extracted upward to yield the desired test 

 zone. 



6. The boreholes were then filled to the top of the casing 

 with clear, fresh water and the distance of water level 

 drop with time was measured and recorded. 



2-05. LABORATORY TESTING 



A laboratory testing program was undertaken as part of this 

 investigation to aid in classifying the soil recovered in the 

 borings. The tests performed included Atterberg limit 

 determinations and grain size distribution analyses (sieve and 

 hydrometer analyses) . 



All laboratory tests were performed in the H&A laboratory in 

 general confoirmance with current ASTM procedures. Atterberg 

 limit determinations and results of the grain size analyses are 

 included as Appendix E. 



• 1 I 



A9X 



oe 77 



