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Quality Assurance Testing Proposal Village Parkway UPRR Crossing Improvements, Lake Elmo, MN May 12, 2025 AET Proposal No. P-0043606 Page 3 of 6 are proof rolled by a loaded, tandem-axle dump truck. • Evaluate the subgrade deflections under the wheel loads, and mark areas of excessive deflection. Areas of excessive deflection will be shown to personnel from the contractor and/or their subcontractors. • Provide recommendations for correction of the unstable subgrade soils. Bituminous Pavement Sampling and Testing As bituminous paving is being completed, AET personnel will pick up companion samples provided by the contractor, during each day of paving, and transport the samples to our St. Paul, Minnesota laboratory. Samples will be tested in our laboratory for Asphalt Extraction and Aggregate Gradation (ASTM D2172 Method E-11) MnDOT Modified C137 and C117. Bituminous Nuclear Density Gauge Testing When placement of the bituminous base and wear layers begins, an Engineering Technician will make site visits on an on-call basis to perform nuclear density gauge testing of the bituminous. BMI will determine and mark the random nuclear density test locations of the bituminous. AET understands that we will test a minimum of 1 location per 500 linear feet. Concrete Sampling and Testing During the placement of concrete, AET will perform field testing consisting of slump, air content, temperature of the plastic concrete, and casting of cylinders for compression testing. The City SMC requires field testing for slump, air content, and temperature per every 1,500 linear feet of each type of concrete placed each day. Compressive strength cylinders (1 set of 3 cylinders) are required once per every 1,500 linear feet of each type of concrete placed each day; the cylinders will be retrieved the following day for curing and testing in our laboratory. The 3 cylinders are to be tested at 28-days. We are proposing to cast sets of 5 cylinders, with compressive strength testing as follows: 1 at 7 days, 3 at 28 days, and the 5th cylinder will be held in reserve for future testing if the 28-day strength requirement is not met. We have assumed BMI personnel will be compiling the concrete batch tickets, certificates of compliance, and AET’s field test results of the plastic concrete, which we will provide each day we are on-site performing testing services. REPORTING AET staff will prepare reports for the City and BMI to review. These reports will include the results of our field and laboratory testing as performed per the City SMC and testing frequencies