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Christopher Riehle, PLS I Psomas Survey REGISTRATION 2018/Professional Land Surveyor/CA #9453 EDUCATION 2002/BS/Geography, GIS Minor/California State Polytechnic University, Pomona Christopher Riehle has 17 years of experience in a wide array of survey and mapping disciplines. These disciplines include ALTA/NSPS Land Title Surveys, boundary analysis, topographic mapping, preparation and review of parcel maps, final maps and Records of Survey, lot line adjustments, legal description preparation, analysis and mapping of rights -of -way and easements, and extensive GPS post -processing and geodetic control network establishment throughout California and Nevada. Project Experience Peck and Chestnut Street Sanitary Sewer Replacement Project, Lake Elsinore, CA: QA/QC Manager for preparation of plans and specifications to replace approximately 2,500 LF of 6-inch sewer main with 8-inch sewer main. An additional 1,000 LF of existing 6-inch sewer will be re -lined since there are issues with construction access in the 10-foot alleys east of Main Street. One pipe segment is on a private residence where we propose pipe bursting to mitigate impacts to the owner's garage and property. Orange County Fair and Event Center, Costa Mesa, CA: Project Surveyor in support of the California Construction Authority authorized to do a topographic survey of the entire 150-acre OC Fair & Events Center property in Costa Mesa. Project management included establishment of project survey control using a combination of GPS and conventional survey methods and oversight of topographic survey of the complete site consisting of compilation of aerial mapping and design -level ground survey. Design -level topographic survey included detailed data collection of all light towers, wires, cables, and surface -visible indications of utilities above and below ground, including, but not limited to, manholes, catch basins, valves, vaults, and indications of electrical, sewer, phone, and other subterranean uses. Topographic survey also included quantities and types of parking spaces on surface parking areas in the site. Aerial mapping collected all visible features for roadway, utilities, and cultural items in support of the conventional ground survey. DTM breaklines and mass points supplemented select planimetric features for triangulation of a surface model and, ultimately, the creation of the 1-foot contours for the entire site. On -Call Surveying Services, Orange County Sanitation District, Orange County, CA: Survey Task Manager for this on -call project which consisted of conducting topographic surveys to assess the stability of the pipeline and manholes along the subject Santa Ana River Interceptor (SARI) line segment. Field surveying for each monitoring survey at critical locations was used to assess the current pipe depth and compare changes in the pipe depth with previous reports. The work included taking survey cross sections and profiles of the SARI line and the Santa Ana River bed at various locations. c„y of saai, nr'l RrP N,, 19 101) PSOMAS