Approval of the Moore Printed Circuits Corrective Measures Implementation Plan

Summary

SCH Number
2005038121
Lead Agency
Toxic Substances Control, Department of (Department of Toxic Substances Control)
Document Title
Approval of the Moore Printed Circuits Corrective Measures Implementation Plan
Document Type
NOE - Notice of Exemption
Received
Posted
3/11/2005

Document Description
The Corrective Measures Implementation Plan addresses potential health risk resulting from release of volatile organic compounds and metals during past printed circuit board manufacturing operations. The proposed remedy is a land use covenant to limit the property to industrial use. Sampling was conducted to determine the levels and limits of residual contamination. The residual concentrations of copper (489 mg/kg), lead (42.1 mg/kg), arsenic (7.3 mg/kg) are directly associated with the former subsurface wastewater pipes and a sump. All other metals' concentrations detected were below background soil levels. Residual solvent concentrations in soil gas were also found. No cyanide residue was detected in the soil. A Human Health Risk Assessment was conducted to determine whether human health or the environment is at risk from the remaining contamination. Residual solvent concentrations in soil gas are above residual exposure levels, for indoor air contaminant, but are acceptable for continued industrial/commercial use of the property. Although residual metals' concentrations are above background soil levels, they will not pose a substantial risk to continued industrial/commercial use of the property. There is no risk to groundwater or neighboring properties from the residual contamination. The deed restriction will limit the property to industrial use. Specifically, this will prohibit use of the property as a residence, hospital, school for persons under the age of 21, or daycare center to avoid an unacceptable cancer risk.

Contact Information
Irena Edwards
Department of Toxic Substances Control
Office of Military Facilities 5796 Corporate Avenue
Cypress, CA 90630

Phone : (714) 484-5385

Location

Cities
San Diego
Counties
San Diego

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Section 15330
Reasons for Exemption
1. The project is consistent with the definition of Minor Actions to Mitigate or Eliminate the Release of Hazardous Waste or Hazardous Substances for the following reasons: (a) The project cost is well below the 1 million dollars limit set in regulation for small cleanup actions. (b) The site is not on the Hazardous Waste and Substances Sites list compiled pursuant to Government Code section 65262.5 and is not in an area of biological or cultural resources significance. 2. The decision to approve and implement the selected remedy will not cause a significant effect on the environment because: (a) No demolition or soil removal is required to implement the remedy. (b) Directly surrounding the land uses are industrial/commercial. Three schools have been identified in the broader area but are not expected to be affected because there will be no additional removal or transportation of hazardous waste or materials. The nearest school is more than 0.1 mile away and will not be affected by the contamination remaining at the site. (c) Soil gas concentrations resulting from solvents spills to the ground are largely located in the top 5 feet of soil. Residual solvents' concentrations are acceptable for continued industrial/commercial use of the property. (d) The bedrock was encountered at the depth of 2-5 feet at the site. Regional groundwater in the area is approx. 200 feet below ground surface and perched water table is at about 40 feet below ground surface. No contaminant concentrations greater than the California maximum contaminant levels (MCL) were detected in the perched groundwater samples. (e) Residual concentrations of copper (489 mg/kg), lead (42.1 mg/kg), arsenic (7.3 mg/kg) are directly associated with the former subsurface wastewater pipes and a sump. While residual metals' concentrations are above background soil levels, they will not pose a substantial risk to continued industrial/commercial use of the property. All other metals' concentrations detected were below background soil levels. No cyanide residue was detected in the soil. (f) A land use covenant, filed as a deed restriction, will eliminate the potential risk from residual contamination at the site by prohibiting the use of the property as a residence, hospital, and school of persons under the age of 21, or daycare center. The potential risk to the onsite or construction workers is within an acceptable range. No restriction on groundwater use or the use of neighboring properties is necessary.

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.

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