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5.3 Project Costs. A cost estimate for the proposed grouting program is presented below in Table 2. As shown, project costs are estimated at $65,824. It should be noted that these costs are estimated based on our experience with similar projects in the central Florida area. Costs for any needed structural or cosmetic repairs to the house are not included in this estimate. Actual, final project costs for the grouting may be lower (or possibly higher) after the project is subject to final design, competitive contractor bidding, and any modifications during implementation. Table 2 Estimated Project Costs Subsurface Compaction and Chemical Grouting Barker Residence Subsurface Compaction and Chemical Grouting Quantity Units Unit Cost Cost a. Contractor Mobilization 1 each $2,000 $2,000 b. Installation of Grout Casings 950 feet $16 $15,200 c. Grout Material (estimated) 190 cubic yds. $160 $30,400 d. Exterior Chemical Grouting 1 day $7,000 $7,000 (includes 500 lbs of material) e. Additional Polyurethane Material 400 lbs $13 $5,200 Subtotal = $59,800 Engineering Supervision Cost Inspection & oversight - estimated 6 to 8 days to estimated 6,024 complete grouting TOTAL ESTIMATED PROJECT COSTS = $65,824 In order to ensure compliance with the finding of this study and project specifications, we recommend that BCI be retained to evaluate the contractor bids and provide project monitoring and oversight services during the grouting operations. 6.0 LIMITATIONS The analysis described in this report is of sufficient scope to either identify or eliminate sinkhole activity as the cause of damage within a reasonable, professional probability. Our professional services have been performed using the degree of care and skill ordinarily exercised, under similar conditions, by reputable consulting engineers practicing in this or similar localities. The soil conditions indicated within this report are accurate with respect to the locations and extent of the soil borings. The findings presented in this report are based on the test borings drilled at the site, laboratory testing, and our professional judgment. Subsurface conditions different from those encountered during our exploration may exist. Opinions rendered regarding the house structure have been based solely on visual observations without benefit of any type of structural analysis, destructive or invasive testing to determine the structural integrity of concealed structural members, or review of design or construction drawings. No warranty regarding this investigation is intended, nor should any be implied. This report and information contained herein was prepared for the exclusive and specific use of Security First Insurance/Premier Adjusting Services. Any other use of this report or parts of this report shall be authorized in writing by BCI Engineers & Scientists, Inc. Subsidence Investigation BCI Project No.: 19 -17094 Barker Residence March 2009 Claim No.: 3428 Page 10