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City of Santa Ana
<br />On -Call Environmental Review Services for Housing Division
<br />times. All site personnel, subcontractors, and visitors who enter the exclusion zone will be required
<br />to sign the HSP form on a daily basis.
<br />• Sampling of Desired Media. Upon receipt of the City's approval of a work plan (and regulatory
<br />oversight agency approval, if applicable), samples will be collected by support staff and overseen by
<br />the project manager. Samples can be obtained using a variety of methods, including, but not limited
<br />to, surface grab sample, shallow hand augersample, backhoe sampling, high-flow/low-flow
<br />groundwater sampling, soil vapor sampling, direct push sampling, or hollow -stem auger or air rotary
<br />drilling. As described in Section 6.1, Rincon has assembled a team of subcontractors capable of
<br />supporting anticipated project needs.
<br />The appropriate sampling methodology is dependent on the following: suspected source of
<br />contamination (point source versus non -point source); suspected type of contaminant (volatile or
<br />non-volatile); media affected (soil, groundwater, and/or soil vapor); anticipated depth of
<br />contamination; and soil/geologic conditions at a site. Depending on the scope of work, soil vapor
<br />wells, soil vapor probes, groundwater monitoring wells, groundwater extraction wells, or other
<br />sampling devices may need to be installed at a site. Permits for wells will be obtained, if necessary.
<br />Licensed professionals will perform or oversee the installation of sampling devices, where
<br />applicable. Prior to any subsurface assessment, Underground Service Alert utility notification service
<br />will be contacted and the area to be disturbed will be identified. In addition, the proposed locations
<br />will be provided to the City for the identification of possible subsurface utility conflicts.
<br />• Laboratory Analyses. Depending on the project schedule and budget, samples will be analyzed
<br />through an onsite laboratory (for very quick turn -around projects) or through a fixed laboratory
<br />(standard schedule project). A California -certified laboratory approved by the City will perform all
<br />analyses.
<br />• Data Analysis and Reporting. Sample analytical results will be tabulated and maps depicting sample
<br />collection points and pertinent data will be prepared. The data analysis will include a discussion of
<br />the nature and extent of contamination, and recommendations for follow-up work, if needed. Site
<br />closure, if appropriate, will be considered following all assessments. Additional assessment,
<br />remediation, or health risk assessment will be considered if site closure does not appear to be a
<br />viable alternative. All aspects of the Phase II ESA will be conducted under the direct oversight of a
<br />California Professional Geologist, or a California Professional Civil Engineer. Our on -staff California
<br />Professional Geologist, or a California Professional Civil Engineer, will sign and stamp all assessment
<br />reports.
<br />C.4 Additional Technical Studies
<br />Besides historic and the site assessment work described above, under our current on -call contracts with
<br />the City, we have prepared or peer reviewed technical studies for air quality, greenhouse gas emission,
<br />noise and vibration. Our environmental planning professionals are skilled in the preparation of a broad
<br />range of technical studies in support of the CEQA and NEPA documents, including air quality, aesthetics,
<br />biological resources (wetland delineation, special status species analysis), noise, and greenhouse gas
<br />emissions. Often, these studies are performed prior to finalization of a proposed project to assist
<br />project design teams in developing a project that avoids or minimizes significant environmental effects
<br />at the design phase. These studies have included, for example, simple special -status species surveys
<br />used in site selection and feasibility, as well as more detailed protocol level surveys to meet specific
<br />ordinance and permitting agency requirements. Our environmental planning team has also supported
<br />the City with the development and implementation of mitigation monitoring and reporting programs,
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