25F - AGMT HAZARDOUS MATERIALS SURVEYS

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Environmental ■ Facilities ■ Geolechnical ■ Materials excavated and properly disposed. Interaction with the Regional Water Board and Public Notification resulted in the issuance of case closure, MUNICIPAL LANDFILL CLOSURE AND RESTORATION I VCP SITE Successfully oversaw and managed the engineering design and construction quality assurance for the closure and restoration of a high-profile MSW landfill in accordance with regulatory standards, subsequent to significant investigation activities. The remedy consisted of removal and consolidation of wastes and construction of LFG recovery trenches to prevent migration of landfill gas. The remedy utilized engineering controls and removal of impacted media. Project management responsibilities included coordination with Local, State and Federal officials, public/neighborhood communications, and interaction with attorneys, and management of project budgets that exceeded $4.5 million over seven years. Terracon continues to provide post closure care monitoring and O&M for the site. CLOSURE INVESTIGATION j CITY -OPERATED LUST FACILITIES Provided senior project management of 14 City operated LUST facilities through coordination of investigation, regulatory reporting and response actions In the pursuit of closure. Mr. Parten was responsible for managing all site activities, evaluation of data, reporting, communicating with local and state officials, and management of budget and schedule requirements. BROWNFIELD AND VOLUNTARY CLEANUP I MUNICIPAL PROPERTY Provided senior project management and technical review of several properties, Including the remediation of metals and PAH -impacted soils, using a combination of excavation and removal and in-place stabilization. Work was performed under the EPA Brownrields Program and the Voluntary Cleanup Program. The $1.2 milllon-dollar remediation project was part of a high- profile downtown parks and recreation redevelopment project that successfully established LEED Certified public parks in areas once occupied by commercial and industrial property. Mr. Parten was responsible for managing all site activities, evaluation of data, reporting, communicating with local and state officials, and management of budget and schedule requirements, SITE INVESTIGATION I RETAIL SHOPPING CENTER, VCP SITE Conducted extensive site Investigation activities to evaluate the magnitude and extent of chlorinated solvents identified near a former dry cleaning facility. The chlorinated solvent plume was defined to drinking water standards and was delineated to a creek channel nearly 1,200 feet from the source property. Based on site Investigation results, assisted the property owner in entering the site into the VCP, and managed and implemented response actions and treatment of affected media utilizing a combination of source-removaVexcavatlon (750 cubic yards) within the building interiors, hydrogen -releasing compound (HRC®) treatment of backfill, and HRC injection into the underlying soil and groundwater across the site. Treatment technology effectively remediated affected soils and significantly reduced contaminant levels within the on- site source areas. Additional response actions were conducted to reduce on-site groundwater contamination levels through HRC Injection at over 250 locations. Monitored natural attenuation and groundwater monitoring was performed for a period of approximately four years. Mr. Parten assisted the client In the establishment of a deed restriction (Municipal Setting Designation) that restricted the use of groundwater on the site. Mr. Parten interacted with City and State officials and prepared and submitted multiple reports documenting site activities, and managed a project budget totaling $1,200,000. 1rCity of Santa Ana Public Works Agency — Various Environmental Services (RFP No. 18-043) —A2 Hazardous Materials Surveys 25F-288