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Other descriptive information includes: Color Moisture Consistency (very soft, soft, firm, hard, very hard) Structure Compactness (loose, dense) for silts Cementation (uses hydrogen chloride) Odor Iridescent sheen (based on sheen test) Debris (e.g., paper, wood, plastic, cloth, concrete, construction materials, etc.). C.4.4 Other Logging Parameters Standard Penetration Tests This method generally follows ASTM D1586-08A Standard Test Method for Standard Penetration Test (SPT) and Split-Barrel Sampling of Soils. This method provides a means of assigning a relative density to the soil by counting the number of hammer blows (blow counts) required to advance a split-barrel sampler a specified distance into the undisturbed soil ahead of the lead auger. This method is not applicable to boreholes advanced with direct-push sampling equipment. It is used primarily in conjunction with hollow stem auger drilling apparatus as the test can be performed through the auger string without removal of the augers thereby allowing the borehole to remain open to the bottom of the drill string without risk of caving. As the sampler is advanced by the repeated drop of a hammer of known weight, the blow counts are recorded on the log and used to provide a relative density descriptor to the soil penetrated during the test. The number of blows required to drive the sampler 6 inches by a 140-lb hammer falling 30 inches Fifty blow counts per 6-in drive is considered "refusal," and sampling at this depth is usually terminated. In addition, a total of 100 blow counts per 18-inches drive, or no observed advance of the sampler during ten successive hammer blows, is also considered "refusal." During coring, leave this section blank. Normally, the second and third 6-inches intervals are recorded and added as the number of blows per feet. Sampler Type/Depth. Give sampler type by the letter code listed below and identify the depth at the top of the sampling interval in feet below ground surface (bgs). Sampler type Inside diameter(inches) Code Standard penetrometer 1.38 SP Split-barrel (small) 2.0 SBS Split-barrel (large) 2.5 SBL Those descriptors are as follows for coarse grained soils: Very Loose 0 to 3 SPT Sampler 0 to 4 Mod CA Sampler Loose 4 to 7 SPT Sampler 5 to 10 Mod CA Sampler Medium Dense 8 to 23 SPT Sampler 11 to 30 Mod CA Sampler Additional Soil and Groundwater Sample Work Plan, Page 5 BNSF Mormon Yard, Stockton, California Ittwybnsf2tbnsfwp wp1201811899020 00_mormon_yardtwork_plan_nitappb_sogboreholelogging acpt chng_wp doc