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Subsidence Investigation SDtI Project i�Jumber•3023547 Quiros-Martinez Residence-Zephyrhills, Florida EXECUTIVE SLTMI�IARY Cooperativa de Seguros Multiples retained SDII Global Corporation (SDII) on May 5, 2010, to conduct a subsidence investigation at the Quiros-Martinez residence in Zephyrhills, Florida. The purpose of the investigation was to determine the existence of sinkhole activity as defined by Chapter(§)627.706 Florida Statutes at the residence. The existence of sinkhole activity and a consequent sinkhole loss was investigatr:;d in accordance w�th the requirements of§627.707 Fiorida Statutes following standard �nethod�s. The following methods were utilized in our investigation: ❑ A site inspection and homeowner interview were completed to identify local conditions, damage, history of the structure, homeowner concerns, and details of the construction of the house. ❑ A ground penetrating radar survey was conducted to identify anomalous s ubsurface areas. ❑ Three test pits were excavated to observe foundation construction and geometry directly. ❑ Hand auger borings and push penetrometer soundings were advanced to determine tlie composition and strength of subsurface materials near the foundation. ❑ Standard Penetration Test (SPT) borings were advanced to character�ze the relative stability of soils and deeper geologic conditions. ❑ Laboratory testing of soils was performed to identify deleterious soil type:, and for quality control of soil and geologic materials classification. ❑ Relative floor elevation contour mapping was completed to identify a.�nomalous floor elevation trends and establish a baseline contour map ofthe existing floar�elevation. ❑ A structural assessment was completed to identify construction method,., and structural deficiencies related to the potential causes of observed conditions. It is SDII's opinion, with a reasonable professional probability, that sinkfiole activity as defined by §627.706 Fiorida Statutes exists at the Quiros-Martinez residenci�. Evidence of sinkhole activity was identified at the site, including: (1) the systematic pattern of declining N values through clay-rich soils overlying ]imestone in SPT borings B-] and B-2; (?) multrple feet of weight-of-rod/hammer strength materials overlying limestone in SPT boring.<_, B-I and B-2; and(3)the rapid losses of drilling fluid circulation above iimestone in SPT boring; B-1 and B-2. Furthermore, based on the data presented herein, it is SDII's opinion, wit�i a reasonable professional probabiIity,that a sinkhole loss,as described by§627.706 Florid,a Statutes, has occurred at the Quiros-Martinez residence. The damage to the residence is �;;onsistent with normai shrinkage cracking of un-reinforced or mildly reinforced concrete and t�;iasonry; minor differential foundation movement associated with sinkllole activity; long-term deflection of the roof structure; post-construction structural settlement; and minor thermal and moisture induced volume changes of construction materials includin stucco, and fasteners. The ]ack of sufficient footing enbedmebta a�y have c nt.ribu�ted o�the iii