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Subsidence lm+estigation SDII Project Number:3023547 <br /> Quiros-Martiriez Residence-Zephyrhills,Florida <br /> 4.0 CONCLUSIONS <br /> It is SDII's opinion, with a reasonable professional probability, that sinkhole activity as <br /> defined by Fj627.706 Florida Statutes exists at the Quiros-Martinez residence. Evidence of <br /> sinkhole actiwity was identified at the site, including: (1) the systematic pattern of declining N <br /> values throu��h clay-rich soils overlying limestone in SAT borings B-1 and B-2; (2) multiple feet <br /> of weight-of-rod/hammer strength materials overlying limestone in SPT barings B-1 and B-2; <br /> and(3)the ra,pid losses of drilling fluid circulation above limestone in SPT borings B-1 and B-2. <br /> Furthermor�:�, based on the data presented herein, it is SDII's opinion, with a reasonable <br /> professional probability,that a sinkhole loss,as described by§627J06 Florida Statutes, has <br /> occurred at trhe Quiros-Marfinez residence. The damage to the residence is consistent with <br /> normal shrinls:age cracking of un-reinforced or mildly reinforced concrete and masonry; minor <br /> differential fc,undation movement associated with sinkhole activity; long-term deflection of the <br /> roof structure„ post-construction structural settlement; and minor thermal and moisture induced <br /> volume chan�es of construction materials including gypsum board, wood trim and framing, <br /> stucco, and f,��steners. The lack of sufficient footing embedment may have contributed to the <br /> damage. The observed damage on the exterior and interior of the residence is cosmetic in nature, <br /> such that the design function of the building has not been compromised. <br /> SDII recomm��nds that the sinkhole conditions be remediated using compaction grout injection to <br /> increase the dc;nsity of the soils and cap the limestone. Following the compaction grouting, 5DII <br /> recommends tl5at the shallow soils around the perimeter of the residence be stabilized through a <br /> program of vertical chemical grout injection. SDll also recommends that the rernediation <br /> program be monitored in order to verify that it is completed in accordance with our <br /> recommendations. The cost of remediation, monitoring, and certification is estimated to be <br /> approximately $59,275. <br /> 4-1 <br />