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RFP No. 18-043 Al - Environmental Site Assessment and associated transportation, treatment and disposal costs will be included, if not previously defined. A draft report will be submitted to the City for review and a meeting will be held with City personnel to explain the findings and conclusions, if desired. City comments will be incorporated and the final report distributed as requested by the City. When required, data will be transmitted to the RWQCB via GeoTracker. HEALTH RISK ASSESSMENT EXPERIENCE Ninyo & Moore has developed its risk assessment program to accurately define and quantify the risk of hazardous substances to human health and the environment in accordance with USEPA's Risk Assess- ment Guidance for Superfund. The Phase II ESAs that Ninyo & Moore completed for numerous existing and proposed school sites included a health risk assessment. These were reviewed and approved by the toxicologists in the Office of Human and Ecological Risk Overview (HERO) of the DTSC. The contami- nants of concern at these sites included total petroleum hydrocarbons, volatile organic compounds, organochlorine pesticides, polynuclear aromatic hydrocarbons, and heavy metals. The risk assessment follows a rigorous protocol and produces a conservative estimate of the potential health risk from chemicals of potential concern. The purpose of a risk assessment is to assist the inter- ested parties in making informed risk management decisions regarding the need for site remediation or other risk -mitigating steps. If needed, Ninyo & Moore will work closely with our toxicologist, on this specific task, who has extensive experience in environmental toxicology, and human health and environmental risk assessment for indus- trial, real estate, and governmental clients. Our team's approach to the exposure/risk assessment process is to control the degree of contaminant migration necessary to minimize risk to human health and environmental resources that may be threat- ened at a site. The purposes of a risk assessment are to: • Identify and analyze the relevant human health and environmental concerns, especially those of site occupants; • Determine complete exposure pathways and potential toxicological consequences; • Compute the risk to human health or environment based on realistic or likely exposure scenarios and potential adverse effects; • Communicate the results of the risk assessment to affected members of the public; • Identify parameters affecting risk that can be addressed by institutional controls or remedial activities; • Reduce the risk to an acceptable level and/or prevent liability; and • Risk assessments are also provided if required by regulatory guidelines and/or City policies. Ninyo & Moore addresses the degree of mitigation required by developing a site-specific cleanup level for each contaminant of concern for the intended future land use. Site-specific cleanup levels may repre- sent alternatives to standard default action levels. Once established, the site-specific cleanup levels are incorporated into evaluations of the technical feasibility of remedial alternatives under consideration. e. Relevant Project Experience The following table lists projects Ninyo & Moore has completed within the last five years for public agencies similar in scope required in the RFP. Due to the page limitations stipulated in the RFP, we have included an abbreviated list. A complete project listing is available upon request. Description Alameda Corridor Transportation Authority Phase I Environmental Site 6/19/2013 Assessment Silvestro, Elaine (562) 247-7777 California Redevelopment Agency/Los Angeles Phase II Environmental Site 7/7/2015 Assessment McCoy, Barron (213) 977-1820 City of Anaheim Public Works Agency On -Call Environmental Consulting 12/31/2020 Services Kelley, Patrick (714) 765-5272 City of Brea Drilling and Soil Sampling 11/14/2014 Chao, Hsing - (714)-1990-7600 City of Irvine Phase I Initial Site Assessment; 9/30/2016 Phase II Environmental Site Romo, Rudy (949) 724-6000 Cit yy of Los Angeles Bureau Of Engineering Two Phase t Initial Site ` 10/20/2013 Assessments, Phase 11 ESA and Mulhern, Mike (213) 847-0534 ® Ninyo & Moore I City of Santa Ana - (A1) Environmental Site Assessment 1 05-00713 1 June 5, 2018