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<br />. Hayward Baker Inc. <br />6850 Benjamin Road <br />Tampa. F.L 33634.04416 <br /> <br /> <br />Tel: 813-884-3441 <br />Fax: 813-884-3820 <br /> <br />- <br /> <br />March 18, 2008 <br /> <br />Center for Radiation Oncology <br />7315 Green Slope Drive <br />Zephyrhills, FL 33541-1314 <br /> <br />SUBJECT: <br /> <br />Subsurface Grouting <br />Center for Radiation Oncology - Revised <br />7315 Green Slope Drive <br />Zephyrhills, FL 33541-1314 <br />HBI File No. T-07-10406 <br /> <br />Dear Gentlemen: <br /> <br />Hayward Baker Inc. (HBI) is pleased to present this proposal for sinkhole remediation by subsurface <br />grouting. This proposal is based upon Central Florida Testing Laboratories, Inc.'s (CFTL) <br />Comprehensive Geotechnical Investigation. <br /> <br />PROBLEM DESCRIPTION <br /> <br />According to the Comprehensive Geotechnical Investigation, the home is bearing upon soils that are <br />being affected by deep sinkhole activity. In accordance with standard engineering and construction <br />practices and in accordance with the geotechnical engineer, HBI will be performing a subsurface <br />grouting program to stabilize the deep sinkhole conditions. <br /> <br />GROUTING PROGRAM <br /> <br />We follow CFTL's recommendations and scope to stabilize the sinkhole conditions by using a <br />subsurface grouting program. This grouting program involves the injection of a sand, cement-fly ash <br />grout under high pressure to compact and displace soils. In addition, the grout will tend to plug any <br />breaches in the soil rock interface and minimize the possibility of future raveling of soils into <br />solution cavities. <br /> <br />The grout point locations indicated on the attached sketch have been located with similar projects in <br />mind and as per CFTL' s recommendations. These are all preliminary and may be changed either <br />before or during the grouting program as directed by the soils engineer. <br /> <br />+-- <br /> <br />California. Colorado. Florida. Georgia. Illinois <br />Maryland . Missouri . New Jersey . New York . North Carolina <br />Rhode Island . Tennessee . Texas . Washington . British Columbia <br />HaywardBaker.com <br />Equal Opportunity Employer <br />