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Subsidence Inv;;stigation SDll Project Number•3023547 Quiros-Martiriez Residence-Zephyrhills,Florida Push penetrometer tests were performed to depths of 1 to 4 feet bls in the hand auger borings to indicate the relative resistances of shallow soils. The push penetrometer test results indicated soil resistance va]ues of 5 to 33 kg/cm'. The tests indicate very loose to loose soil conditions. 2.3 Standiard Penetration Test Results SPT borings were located in three areas of the project site as shown on Figure 4. All three SPT borings were located near damage to the house. The upper four feet of the SPT borings were hand augereci to avoid possible buried utilities. The lithologies, blow counts, and drilling conditions from each SPT boring are illustrated in Appendix C. Refer to the Glossary for the meanings of t�,rms used on the boring]ogs. The SPT boring data indicate that the site geology is generally consistent with the regional geology (see tiection 1.8), with sand, sand with silt, clayey sand, and clay overlying limestone. The push penetrometer data and N values in the upper 10 feet of the borings indicate that the near-surface soils were very loose to medium dense. The borings were terminated at depths ranging from�`.i0 to 75 feet bts. Push penetron�ieter testing of the upper four feet in the SPT borings indicated very loose to loose soil condition<j. The N values m SPT boring B-1 increased between the land surface and about 20 feet bls, then gradually decr•eased with depth through clayey sand and clay to the top of the limestone. The top of the limesto�ie was encountered at about 46 feet bls. Limited weight-of-rod strength material was encounter�d at 28.5 feet bls. However, this event occ�.irred in the "seating blow" interval. This interval i:, not included in the N value calculation as it has likely been disturbed by drilling. A total of seve:n feet of weight-of-rod strength materials were encountered in the clay layer and the limestone 1'r,elow it, starting at 43.5 feet bls. A rapid loss of drilling fluid circulation occurred above the lime;stone at 43.5 feet bls. The boring was terminated in limestone at 60 feet bls. In SPT boring, B-2, the N values remained increased with depth between the land surface and about 20 feet t�ls. Below 20 feet bls, the N values decreased with depth through clayey sand and clay. Limestor�e was encountered at 53.5 feet bls. Limited weight-of-rod strength materia] was encountered a1. 38.5 feet bls. However, this event occurred in the "seating blow" interval. This interval is not included in the N value calculation as it has likely been disturbed by drilling. A total of 5.5 feet of weight-of-rod/hammer strength materials occurred in the clay layer above the limestone. A r.;�pid Ioss of drilling fluid circulation occurred above the limestone at 48.5 feet bls. The boring wa,,terminated in limestone at 75 feet bls. The N values in SPT boring B-3 fluctuated slightly with the clay content of the sediments penetrated. Th�� top of the limestone was encountered at approximately 53 feet bls. Limited weight-of-rod;.trength material was encountered at 23.5 feet bls. However, this event occuned in the"seating bli�w" interval. This interval is not included in the N value calculation as it has likely been disturbed by drilling. No rapid loss of drilling fluid circulation occurred in the boring. The boring was tenninated in limestone at 65 feet bls. 2-2