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SCOPE OF SERVICES Based on our discussions with you and our review of the information provided by your office, we will initially perform GPR for each street. The GPR will be performed using GSSI SIR 20 B unit with air coupled horn antennas. The GPR traverses will generally be collected 8 feet from the curb on one side of the street; however, we will select approximately 10 percent of the streets, or approximately 5,300 lineal feet, to perform supplemental traverses at other locations on the streets in order to develop representative profiles for these streets. The data from the GPR will be reviewed in real time as well as downloaded for further processing using GSSI's Radon software and/or Road Doctor software. The electronic data will be available in Excel format for transfer to and use by the City. If requested, a formal report of the GPR will be prepared. Based on the results of the GPR, we will perform discreet cores at 60 to 80 locations. The purpose of the pavement cores is to calibrate the results of the GPR, identify the subgrade soils, and to further investigate any areas that the GPR results may not be conclusive. For the purposes of this proposal, we have planned 4 days of coring work. Upon completion of our analysis, we will complete the Excel spreadsheet provided to indicate the pavement thickness, base thickness, and subgrade soil type at each core location, and we will also indicate the average pavement and base thickness for each traverse in S00-foot lengths based on the results of the GPR. Prior to performing the coring, we will visit the site to mark the planned core locations in the field and subsequently call each location in to Underground Service Alert. We respectfully request that City personnel contribute to this component of our work to further minimize the potential for encountering utilities in our cores. SCHEDULE We can initiate our services within 2 weeks of receiving authorization, and we estimate the GPR work will take 2 days in the field and 10 days to process that data. Coring will be initiated within 5 days of the completion of the GRP data processing and is estimated to take 4 days. We can issue the summary Excel spreadsheet as outlined above within 7 weeks (35 working days) of receiving authorization. FEES The fee for the outlined geotechnical investigation will be on atime-and-materials basis and will not exceed 524,900 without your authorization. The fee is broken down as follows: ~~ESIG N= z SantaAna-l-Ol :062708