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Gregory Guillen, PhD, PE <br />Treatment Design <br />Gregory Gulllen is a chemical and environmental engineer <br />focused on water and wasterwater treatment. Dr, Guillen's <br />expertise covers the fundamentals of chemical and <br />environmental engineering with an emphasis on water and <br />wastewater treatment. Dr. Guillen has authored several peer- <br />reviewed papers in the field of desalination and membrane <br />filtration, holds multiple patents, and has lectured in the <br />Department of Civil and Environmental Engineering while at <br />UCLA. Dr. Guillen has 6 years of experience analyzing, <br />improving, and designing water and wastewater treatment <br />processes as well as odor control systems while with Dudek. <br />His ability to break down very complex problems into easily <br />understood solutions makes him an asset to any water or wastewz <br />Project Experience <br />EDUCATION <br />University of California, Los Angeles <br />MS, Civil Engineering <br />PhD, Civil Engineering <br />University of California, Riverside <br />35, Environmental Engineering <br />LICENSE <br />Professional Civil Engineer <br />CA No. 83607 <br />PROFESSIONAL AFFILIATIONS <br />California Water Environment Association <br />WateReLlSe Assodation <br />ter project <br />4S Ranch WRF Disinfection Alternatives Technical Memorandum, Olivenhain Municipal Water <br />District, Encinitas, California. Dr. Guillen produced a Technical Memorandum describing the existing UV <br />disinfection system and operations and potential disinfectlon alternatives, including chlorination systems <br />and upgraded UV systems, The Tech Memo described and compared capital and operational costs for <br />each alternative. Recommendations were made to the District for disinfection system capital <br />improvements. <br />San Clemente Island Potable Water Delivery — Water Quality Investigation, Curtin Maritime, San <br />Diego, California, Dr. Guillen assisted Curtin Maritime in the evaluation of water quality issues associated <br />with the delivery of potable water to the US Naval base on San Clemente Island. Dr. Guillen inspected <br />barge holding tanks and discussed the recurring water quality issues with Curtin and the Navy. <br />Recommendations were given to remedy the identified biological and VOC water quality exceedances. The <br />water quality issues have since been corrected. <br />San Jacinto Valley Enhanced Recharge and Recovery Program, Eastern Municipal Water District, <br />San Jacinto, California. Dr. Guillen created the preliminary design for a centralized iron, manganese, and <br />nitrate treatment system. Several new wells were considered for returning to service, all of which exceeded <br />drinking water quality standards for iron, manganese, and/or nitrate. Dr. Guillen designed a treatment <br />system to bring all of these constituents to below their MCLS without the need for costly ion exchange or <br />reverse osmosis. <br />Woods Valley Ranch Water Reclamation Facility Phase 2, Valley Center Municipal Water District, <br />Valley Center, California. Dr. Guillen has designed secondary, tertiary, and disinfection processes for the <br />Woods Valley Ranch WRF Phase 2 expansion. Secondary wastewater treatment consists of an Aero -Mad <br />extended aeration system capable of full nitrification -denitrification. Tertiary treatment consists of <br />coagulation, flocculation, and cloth disk filters. Dr. Guillen has developed a tracer study protocol in <br />coordination with the California Department of Public Health that will be used to recertify the existing <br />chlorine contact basins to determine their ultimate capacities. The WRF will continue to produce Title 22 <br />quality effluent. <br />DUDEK Page 1 of 2 <br />