75A - PH 3321 SOUTH FAIRVIEW ST - Laserfiche WebLink

Home Browse Search

Environmental Checklist For CEQA Compliance recommendation by the Orange County Health Care Agency, a Phase II Subsurface Investigation was completed in February 2006, expanding the initial Phase I and II investigations to further characterize any potential subsurface contamination from past land use activities on site (Appendix C). The Phase I Environmental Site Assessment determined that the proposed project site is not identified as a hazardous material site, nor is it on any lists compiled by the City of Santa Ana Fire Department, the Santa Ana Regional Water Quality Control Board (SARWQCB), or the California EPA Department of Toxic Substances Control (TRC 2006). The proposed project site was listed by SCAQMD as being permitted for certain emissions for a business that no longer exists on the property (TRC 2006). The Phase II Environmental Site Assessment included soil gas, soil matrix, and groundwater sampling, which revealed low concentrations of Perchloroethene (PCE) in soil vapor samples, and low concentrations of Dichloroethene (DCE) in groundwater samples (TRC 2006: 24). Additionally, concentrations of arsenic, benzo(K) fluoranthene, and benzo(a) pyrene were detected in the ballast samples collected from the railroad spur located in the eastern portion of the subject property at concentrations that exceeded the corresponding Preliminary Remediation Goal (PRG) for residential soils (TRC 2006: 24). However, the Phase II report concluded these are not likely to present a potential increased human health risk to future residents (TRC 2006: 24). Based on these results, Orange County Health Care Agency requested additional subsurface investigation to further characterize the nature of site contamination, including the lateral and vertical extent of the contamination along the railroad spur (TRC 2006: 3). This additional assessment was performed in the Phase II Subsurface Investigation. Twelve borings were completed to a maximum depth of 13 feet below ground surface, and soil and groundwater samples were collected at approved locations on site by the Orange County Health Care Agency (TRC 2006: 4). Overall, the results of the samples collected do not suggest that a significant release of hazardous wastes occurred on the subject property, and average concentrations were well below the PRGs for all compounds (TRC 2006: 6). Additionally, none of the samples collected and analyzed along the railroad spur were found to contain detectable levels of contaminants (TRC 2006: 6). The Phase II Subsurface Investigation concluded that no additional investigative actions were necessary or warranted for the site and requested the Orange County Health Care Agency to issue a "no further action" status for the proposed project site (TRC 2006: 7). Based on the information in the Phase I and Phase II Environmental Site Assessment, the Phase II Subsurface Investigation, and Mitigation Measure HM-2 incorporated below, impacts are considered less than significant. Mitigation Measures HM-2 Prior to the issuance of grading permits, the applicant will provide written evidence from the Orange County Health Care Agency to the City that a status of "no further action" for the proposed project site has been issued. D. No Impact. The project is not located within an airport land use plan or within 2 miles of an airport. The closest airport to the project site is John Wayne Airport approximately 3 miles southeast of the project site. The proposed project includes constructing 38 two-story single- family residential units. The proposed project would not result in hazardous obstructions to operations at John Wayne Airport. No impacts would occur. VIII. Hydrology and Water Quality Alton Court August 2007 Initial StudylMitigated Negative Declaration 3-26 J&S 00635.07 75A-92