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, � 1.0 INTRODUCTION This summary geotechnical report presents the results of a Subsidence Investigation of the Orange Blossom Ranch Association Incorporated property located at 4616, 4618, 4620, and 4622 Blossom Boulevard in Zephyrhills, Florida. As related to BCI Engineers & Scientists, Inc. (BCI), the property owner of Unit 4622 has reported recent distress to the unit. Due to some concern that the distress may be due to possible sinkhole activity, BCI was retained to conduct an evaluation of the property to determine the possible cause of the damage. As authorized by Ms. Teressa Kapp of Citizens Property Insurance Corporation, the following tasks were completed under the investigation: • A site inspection and damage assessment of the property; • A ground penetrating radar(GPR) survey of the property; • Completion of four hand auger borings, a series of hand cone penetrometer probes, and two shallow test pit excavations; • A floor elevation survey of the interior of the structure; • Review of area soil survey,topographic, and ayuifer potentiometric surface maps; • Completion of four standard penetration test (SPT) borings with laboratory testing on selected soil samples; and • Compilation of site data and evaluation of the potential for ongoing sinkhole activity at the property. 2.0 BCI FIELD INVESTIGATION 2.1 Site Description The subject property is a single-story wood-framed, quadruplex structure with a masonry stem- wall forming the lower portion of the perimeter walls. The building is situated on the north side of Blossom Boulevard in Zephyrhills, Florida. The subject property is located within Section I 5, Township 26 South, Range 21 East, in southeastern Pasco County, Florida. A site location map is shown on Figure 1. According to information obtained from the Property Appraiser, the building was constructed in 1983. Unit 4616 was purchased in 1996 by Velda Sanderson, Unit 4618 was purchased in 2009 by Jack and Adelaide Blume, Unit 4620 was purchased in 1989 by Brenda Kelly, and Unit 4622 was purchased in 1983 by Loretta Anderson. Unit 4616 comprises the southeastern portion, Unit 4618 comprises the northeastern portion, Unit 4620 comprises the southwestern portion, and Unit 4622 comprises the northwestern portion of the building. Units 4616 and 4618 are east facing, and Units 4620 and 4622 are west facing. Each unit includes an enclosed porch on the outer edge. A site plan of the property is shown on Figure 2. `>�il 'C�E''?b� �(i,'��I`.?2x'=.1C?i�f �C� ��'1'Oj�C? f°`�(i, if�' 3��1_, t C}'<;i�?,fr ?�`�0��'{;:Il I��i�i<;;? .tl tiSGC'1 it1 iCiIZ k i-ia.OJ'j�O�'c`1�f C� /�}Jt l`t :'Q�� i��fi:i"! IR�fi. �i\i,`��..j_��` k�' � �t�