PL-INT-2023-005630 06.30.23 ELEMENT ENVIRONMENTAL LLC CAT PL.5

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F. EXAMPLE PROJECTS WHICH BEST ILLUSTRATE FIRM'S QUALIFICATIONS FOR THIS PROJECT CATEGORY 19.TITLE AND LOCATION (City and State) 20.YEAR COMPLETED Phase I and II Environmental Site Assessments,Former PROFESSIONAL SERVICES CONSTRUCTION (If applicable) Voice of America Site,Maili,Oahu,Hawaii Ongoing 21. PROJECT OWNER'S INFORMATION a.PROJECT OWNER b.POINT OF CONTACT NAME c.POINT OF CONTACT TELEPHONE NUMBER United States Coast Guard Mr.Dennis Mead (808) 535-3464 22.BRIEF DESCRIPTION OF PROJECT AND RELEVANCE TO THIS CONTRACT(Include scope,size,and cost) Project Scope: Element Environmental, LLC (E2) conducted a Phase I Environmental Due Diligence Audit (EDDA) and Phase II Confirmatory Sampling(CS) for an 84-acre portion of the Former Voice of America site located in Maili, Oahu. The Phase I EDDA and Phase II CS were completed in accordance with the Civilian Federal Agency Task Force's (CFATF) Guide on Evaluating , 400000. Environmental Liability for Property Transfers (August 1998) in " • ' support of a transfer of the property to the State of Hawaii. . In support of the Phase I EDDA, E2 conducted a site visit, performed research on the site history, searched regulatory databases, interviewed site managers, and contracted an4, A. archeological firm to perform a cultural inventory survey. In , support of the Phase II CS, E2 prepared a Project Work Plan and li " ' conducted field sampling to investigate potential polychlorinated Project Highlights: biphenyls (PCBs), metals, asbestos, and petroleum hydrocarbon -Conducted a Phase I EDDA. contamination related to the historic use of the site. -Conducted a Phase II CS. The field sampling effort consisted of various sampling • MI soil sampling for PCBs and metals techniques for multiple sample media. A multi-increment® (MI) throughout 82 acres of the site. sampling approach was utilized to assess the nature and extent • MI soil sampling for PCBs, metals, of PCBs and metals contamination for the majority of the 84-acre asbestos, and petroleum project site. hydrocarbons throughout 2 acres of the site. A separate MI sampling approach was utilized to assess the • Installation of six groundwater nature and extent of PCBs, metals, asbestos, and petroleum monitoring wells and collection of hydrocarbon contamination in a two-acre portion of the facility. groundwater samples for PCBs, Six groundwater wells were also installed surrounding this area, metals,petroleum hydrocarbons, and groundwater samples were collected and analyzed for PCBs; BTEX, MTBE, PAHs, and HVOCs. metals; petroleum hydrocarbons; benzene, toluene, • Discrete surface and subsurface soil ethylbenzene, and xylenes (BTEX); methyl tert-butyl ether sampling for PCBs at two previously (MTBE); polynuclear aromatic hydrocarbons (PAHs); and halogenated volatile organic compounds (HVOCs). identified locations of PCB contamination MI sampling of In addition, over 100 discrete soil samples were collected to concrete building foundation for PCBs evaluate the lateral and vertical extent of known PCB • Operation of a field laboratory to contamination at two previously identified locations. E2 reduce the number of off-site PCB operated a field laboratory to reduce the number of off-site PCB analysis and time to obtain analytical analyses and to reduce the turn-around time for analytical results. results. Ten percent of the PCB samples were analyzed by an off- -Prepared a Groundwater Monitoring site laboratory to verify the results of E2's field laboratory. Plan for the site. Based on the elevated PCB soil sample results and at the request of the USEPA Region 9, MI sampling of an adjacent concrete Cost: $ 289,550. building foundation was also completed for PCBs. 23.FIRMS INVOLVED WITH THIS PROJECT (1)FIRM NAME (2)FIRM LOCATION (City and State) (3)ROLE a' Element Environmental, LLC Aiea,HI Contractor 00 f COUNTY OF HAWAII-FY24- PAGE 31