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• <br /> C &N staked the grout injection point locations as shown on Figure 2 in accordance with BCI's <br /> recommendations. Vertical and angled grout points were installed using a 2 -1/2 inch (inside <br /> diameter), steel casing. The grout casings were installed to competent stratum at depths ranging from <br /> 17 to 61 feet below existing grade. A total of 578 feet of grout casing was installed at 18 grout <br /> points. <br /> After the grout casings were installed, a high - pressure pump was used to inject a mixture of cement, <br /> fly ash, sand, water and other admixtures into the loose soils and voids in the limestone and <br /> overlying sand strata. Pumping continued until a grout pressure of 200 to 300 pounds per square inch <br /> (psi) was achieved (over that required to initiate grout take) or lifting of the structure was observed <br /> (via a surveyor' s level). The grout casing was then extracted upward 2 to 3 feet and pumping <br /> resumed. The quantity of grout pumped into individual grout injection points ranged from 0.1 to <br /> 20.1 cubic yards for a total of 70.2 cubic yards of grout used, as shown in Table 1. <br /> During the project, a BCI engineering technician was present to monitor the drilling and grouting <br /> operations and perform applicable grout tests. Compressive strength of the grout was tested by <br /> preparing 2 -inch cube samples of grout. The cubes were cured in a controlled environment in our <br /> laboratory for seven days. After seven days, the cubes were tested in a compressive strength- testing <br /> machine. The test results indicated that the grout achieved the project requirement of 400 psi. Grout <br /> strength testing results are included in Appendix A. Slump tests were performed on selected <br /> samples during grouting operations and were found to be within project specifications. <br /> Grout Monitoring Completion Report BCI Project No. 19- 17094.1 <br /> Barker Residence June 2009 <br /> Claim No. 3428 Page 3 <br />