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Attachment A SCOPE OF SERVICES CITY OF SAN MARCOS PROPOSED SESSOM CREEK WASTEWATER CAPACITY IMPROVEMENTS PRELIMINARY DESIGN, DESIGN, BID, AND CONSTRUCTION PHASE redevelopment plans, design flows, and other necessary data. A base map of the project area will be developed using available information. The base map will include aerial photography, topography, parcels, right -of -way, existing City wastewater lines, FEMA floodplain, and other appropriate data. The base map will be utilized by the project team during Phase A of the project. 4. Identify Wastewater Line Corridor and Candidate Alignments — Using the base map, a project corridor and candidate alignments will be identified for a route analysis. It is our understanding that the corridor will consider shifting the existing alignment to the west, away from the river and towards C.M. Allen. Following identification of the candidate routes, a site visit/route walk will be conducted. 5. Route Analysis: a. Preliminary Environmental Survey: CoxJMcLain will conduct literature searches for sensitive natural and cultural resources that could pose constraints to the proposed interceptor routes. A search of the files and maps at the Texas Parks and Wildlife (TPWD) Natural Diversity Database, Texas Historical Commission (THC), and Texas Archaeological Research Laboratory (TARL) will be conducted to identify and map endangered or threatened species, sensitive natural communities, or sensitive historic or pre- historic resources known to occur in close proximity to the study area. Additional sources of information that will be utilized include published reports, aerial photographs, maps, and records at the Texas Natural Resources Information Systems archives. The information obtained from these efforts will be used to help identify potential permitting and alignment constraints. Following the literature search, CoxJMcLain will conduct a brief field reconnaissance from existing right -of -way, to verify the results and to locate unrecorded constraints along each route under consideration. The results of the literature search, permitting identification, and field reconnaissance will be documented in an environmental constraints report and map. CoxJMcLain will perform a review for jurisdictional waters to identify waters of the U.S. and wetlands falling within the jurisdiction of the USACE. Ecologically sensitive resources, including potential threatened or endangered species habitat, will be identified and their potential to be affected by project construction and operation will be preliminarily assessed and described in the Preliminary Environmental Survey. Archaeological Background Study: CoxJMcLain proposes to review previous studies and published data regarding the proposed action in order to prepare an archeological background study for submittal to the City, for their use in coordinating with the Texas Historical Commission (THC) and /or other agencies /stakeholders. As part of 0FRIESE Page 2 of 10 t° ASS,)_ :n;E.S IN""