Toxic Substances Control, Department of
(Department of Toxic Substances Control)
Precision Optical Incorporated (POI)
NOE - Notice of Exemption
DTSC, pursuant to regulatory authority granted under Health and Safety Code, Chapter 6.8, is approving RAW for the precision optical incorporated site. The site was historically used by POI to manufacture optical components, assembles, and coatings used in the photolithography, laser, biomedical, aerospace, data storage, and meteorology industries. Otting is the owner of the subject property. Chemical uses at the site have included chlorinated solvents, specifically PCE. Due to historical use of PCE and other chemicals at the site, the DTSC requested POI to complete soil, soil gas, and groundwater sampling as part of the local groundwater issues with the "Costa Mesa Site Discovery Project" and to define the extent of PCE-impacted soil at the site.
The RAW proposes excavation and off-site disposal of shallow impacted soils to reduce the concentrations of contaminants in limited areas of the site. If necessary, other remedial alternatives would need to be used to mitigate deeper soils in conjunction with excavation activities. Soil vapor extraction is a cost effective and viable alternative for remediation of VOC impacted soil gas. The SVE system can remediate shallow and deep impacted soils throughout the vadose zone. Based on the results of the pilot study, SVE tech is a feasible alternative. Regulatory permitting will be required through the South Coast Air Quality Management District.
DTSC has determined with certainty that there is no possibility that the activity in question may have a significant effect on the environment b/c the project would not result in "a substantial, or potentially substantial, adverse change in any of the physical conditions within the area affected by the project, including land, air, water, minerals, flora, fauna, ambient noise, and objects of historic or aesthetic significance."