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2.2 Subsurface Chemical Grouting <br /> In addition to the subsurface compaction grouting program, shallow polyurethane (chemical) <br /> grouting was utilized to strengthen and densify the loose soils underlying the house foundation. <br /> Uretek ICR, LLC, performed the chemical grouting on June 22, 2009. Uretek injected specifically <br /> formulated hydrophobic polyurethane expansive foam into small diameter (5/8 -inch) pipes located at <br /> a spacing of approximately 4 to 5 feet and extending approximately 3 feet below the existing ground <br /> surface. Polyurethane grout quantities are summarized below in Table 2. <br /> Table 2 <br /> Summary of Chemical Grout Injection — Barker Residence <br /> Quantity f <br /> L otion 'of* 'Structure . N u m er of sc I>w�,jeCIT root <br /> alb) <br /> North Side 6 151.8 <br /> East Side 19 379.8 <br /> South Side 8 190.8 <br /> West Side 15 333.0 <br /> Totals 48 1055.4 <br /> 2.3 Conclusions <br /> Based on BCI's monitoring of the grouting operations, it is our opinion that the grouting program <br /> was completed in accordance with industry standards and our recommendations. The results of our <br /> observations appear to indicate that at the time the work was completed, the sinkhole condition as <br /> well as the shallow loose soils at the above referenced site had been stabilized. <br /> Grout Monitoring Completion Report BCI Project No. 19- 17094.1 <br /> Barker Residence June 2009 <br /> Claim No. 3428 Page 4 <br />