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ip KEY TO SYMBOLS • <br /> Symbol Description <br /> Strata symbols <br /> Fill <br /> ® Silty low plasticity <br /> clay <br /> ® Silt <br /> ® Low plasticity <br /> clay <br /> Silty sand <br /> ® High plasticity <br /> clay <br /> Soil samplers <br /> . California sampler <br /> ❑ Standard penetration test <br /> Notes- <br /> 1. 'These logs are subject to the limitations, conclusions, and <br /> recommendations in this report. <br /> 2. Soil borings were drilled by a truck mounted mobile B-24 drill rig utilizing 4- <br /> inch outside diameter solid stem augers. Soil samples were driven with a 140-pound <br /> hammer falling 30-inches from two and a half wraps on a rotating cathead. <br /> California Mofidied sample N-values are corrected by a factor of 0 . 64 . <br />