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EXHIBIT A WORK ORDER NO. 13 INDIAN RIVER COUNTY ALL ABOARD FLORIDA NOISE READINGS AND QUIET ZONE INDEX CALCULATIONS BACKGROUND All Aboard Florida (AAF) is developing a passenger rail service between Orlando and Miami, Florida. As part of the proposed project, there are 30 instances within the Indian River County boundaries where the proposed rail system crosses County, City or private roadways. As part of the project development, AAF has prepared an environmental impact statement (EIS) and a noise study that address potential issues or concerns relative to obtaining easements for each crossing from the governing entity of each intersection and the compatibility of the proposed crossings with existing environmental components. In April 2014, the County approved CDM Smith Inc.'s (Consultant) Work Order No. 10 to participate in diagnostic field evaluations of the 30 crossings within the County, review the Environmental Impact Statement (EIS) that is being prepared by AAF and review the corresponding Noise Study that is anticipated to be submitted to the County for review concurrently with the EIS. The Noise Study review authorized in Work Order No. 10 was specifically intended to review the study as it pertains to the impacts to land owners surrounding each proposed crossing and the compatibility with the County's Land Development Regulations. Additionally, if Florida East Coast Inc. (FEC) information is readily available, the information on the proposed high speed rail system will be compared to the existing noise levels of the FEC rail system for reference purposes. This study has not yet been received and is not currently under review. After completing the diagnostic field evaluations, County staff requested that Consultant prepare a scope of services to perform Quiet Zone Risk Index calculations and replicate the conditions within the AAF noise study at six crossings (to verify accuracy of the readings). The following scope of services details the tasks necessary to complete the additional review. SCOPE OF SERVICES Consultant will perform the following services associated with the review of AAF's EIS. TASK 1.0 - NOISE MONITORING AND DATA CONFIRMATION Consultant will review the noise study submitted by AAF under Work Order No. 10. Once received, Consultant will coordinate with County staff to select up to 6 crossings (budget and train schedules permitting) at which to perform confirmatory noise sampling. The selected crossings will consist of a representative sampling of conditions throughout the 30 crossings within the County. Noise measurements will be recorded using a Type 1 or Type II noise level meter — Quest Technologies SoundPro noise meter calibrated using national standards. Sound measurements will be in decibel readings. Short-term (20 minute) sound level measurements near sensitive land uses will be conducted at each site within the study area. Noise measurement will be logged at 1 minute intervals. A handheld GPS unit will be used to record the approximate location of each site. Noise measurements will be taken during the worst noise hour or peak hour to match with the EIS noise study. Baseline measurements without train traffic will be conducted and a second set of readings with vehicular traffic and train traffic math A-1 e+536.aoc 83