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August 2002 -31- 003 -2203 <br />4.2.9 Cast -in-Place Concrete <br />in <br />Golder observed placement and testing of CIP concrete material used in construction of the <br />Phase IVa Area. Golder observed and documented testing of approximately 130 cubic yards <br />of CIP concrete for slump, air entrainment, temperature, and compressive strength. Ten tests <br />were performed on slump, air entrainment, and placement time and eight tests were <br />performed on compressive strength for a testing frequency of approximately one test per <br />13 cubic yards. This exceeded the minimum specified testing frequency of one test per every <br />50 cubic yards. All tests met compressive strength specification. The concrete observation <br />and test results are presented in Appendix H and summarized in Table 15. <br />August 27, 2002 approximately 3 cubic yards of concrete with an air entrainment value of <br />4.7 percent was placed in the 42 -inch CSP wing wall, which was below the project <br />specifications of 5 percent. Golder accepted the low air entrained concrete as the variance in <br />air entrainment was considered insignificant. <br />• <br />I:X0 M0310 WCenW802=32207 0400.04740txcdOC Golder Associates <br />