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Qualifications to Provide Environmental Services— Housing Division Lead Inspector/Assessor for lead based paint. First, a visual survey is conducted to identify the presence of suspect lead based paint. After the suspect lead based paint is located, lead based paint readings are performed from each component identified during the visual survey. Representative lead based paint readings are collected utilizing an X -Ray Fluorescence (XRF) lead based paint analyzer. Readings are collected from selected components throughout the building's interior and exterior. Lead based paint readings are collected in accordance with Chapter 7 of the HUD Guidelines for Evaluation and Control of Lead - Based Paint Hazards in Housing and U.S. Environmental Protection Agency (EPA) 40 CFR part 745 and Title X of the 1992 Housing and Community Development Act. Other Building Surveys Rincon and/or VM3 Environmental/Ambient Environmental are also able to Identify the presence of PCBs in fluorescent light ballasts, mercury switch light ballasts, and perform mold surveys, Soils resting Our approach to environmental sub -surface assessment is to tailor the sampling program to the specific project. Samples can be obtained using a variety of methods, including: • Surface grab sample • Shallow hand auger sample 4 Backhoe sampling • Soil gas sampling • Summa canister sampling • Direct push sampling (i.e., Geoprobe) • Hollow -stem auger, air rotary, and sonic drilling and sampling The appropriate sampling methodology is dependent on the suspected source of contamination (point source versus non -point source); suspected type of contaminant (volatile or non-volatile); media affected (soil only or soil and groundwater); anticipated depth of contamination; and soil/geologic conditions at the site. Soil or groundwater samples are analyzed for suspected contaminants using appropriate EPA or State methodology in laboratories certified by the State to conduct such tests. The testing program is tailored to the suspected contaminants, For example, if a site has an underground storage tank that was used to store gasoline, the soil samples would be analyzed for total petroleum hydrocarbons - modified for gasoline and aromatics (benzene, toluene, ethylbenzene, and total xylenes). The testing may also include lead, if the tank was used to store leaded gasoline, and gasoline additives, as appropriate, based on the period of operation. All sampling is in accordance with the EPA Document SW 846. Additional Services Technical Studies In addition to assisting our with the CEQA and NEPA processes outlined above, Rincon staff will assist with the preparation of a broad range of technical studies, including air quality, aesthetics, biological resources (wetland delineation, special status species analysis), cultural resources, noise, and greenhouse gas emissions. These studies are often needed in support of CEQA/NEPA documentation and are included with the reports as technical appendices. Other times these studies are performed prior to finalization of a proposed project in order to assist project design teams to develop a project that avoids or minimizes significant environmental effects at the design phase. Rincon has experience preparing the following types of technical reports that might be required by the City under this contract: Biological Surveys Cultural and Historic Reports: • Preparation of Area of Potential Effects • Historic Properties Assessments • Archaeological Assessments • Finding of Effects • Memorandum of Agreements • Noise and Air Quality Studies • Global Climate Change and Greenhouse Gas Analyses • Grant Application Preparation • Water Supply Assessments • Geologic and Seismic Studies • Environmental Permitting Page S 25A-20