Removal Action Workplan for Borello Property Site

Summary

SCH Number
2005058253
Public Agency
Department of Toxic Substances Control
Document Title
Removal Action Workplan for Borello Property Site
Document Type
NOE - Notice of Exemption
Received
Posted
5/19/2005

Document Description
DTSC has approved a Removal Action Workplan (RAW) for remediation of soil impacted with organochloride pesticides (dieldrin and toxaphene). The proposed removal action for the soil is bioremediation, which consists of amending the soil with appropriate amounts of fertilizer, lime, and gene expression factor (GEF) for the initial 2 feet below ground surface and monitoring the efficiency of bioremediation process over the entire time. The RAW sets residential cleanup goals, based on a streamlined risk assessment evaluation, of 0.025 mg/kg and 0.40 mg/kg for dieldrin and toxaphene in soil, respectively.

Contact Information
Jacinto Soto
Department of Toxic Substances Control Northern California
Lead/Public Agency
Coastal Cleanup Operations Branch 700 Heinz Avenue, Suite 200
Berkeley, CA 94710

Phone : (510) 540-3842

Location

Cities
Morgan Hill
Counties
Santa Clara

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Section 15330
Reasons for Exemption
The project is consistent with the definition of Minor Actions to Prevent, Minimize, Stabilize, Mitigate or Eliminate the Release of Hazardous Waste or Hazardous Substances for the following reasons: 1. This removal action is intended to eliminate the threat of a release that could expose workers and future residents at the site and will cost less than the regulatory limit of $1 million to complete. 2. 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 resource significance. 3. The project will not have a significant effect on the environment because: a. No soil will be hauled offsite. All contaminated soil will be treated onsite. b. Dust control measures during ripping the superficial soil and handling of contaminated soil will consist of spraying water onto the soil and work area. The dust-monitoring plan will consist primarily of direct-reading instrumentation to measure total particulate levels in the work area throughout the daytime work schedule. Additionally, a perimeter dust action level of 50 mg/m^3 (measured as the difference between the upwind and downwind stations) will be used during dust generation activities to minimize off-site migration of dusts. Levels in excess of the perimeter total dust action level will trigger implementation of additoinal engineering controls in an effort to minimize off-site migration of dusts. The project will implement Best Available Control Technologies for air quality for remediation projects as provided by the Bay Area Air Quality Management District. Dust monitoring will also be conducted to ensure no exceedance of Bay Area Air Quality Management District (BAAQMD) standards. No Air quality permit will be required. In the event that the wind reaches a speed of 25 miles per hour or higher, remedial work will cease until windy conditions improve. c. Temporary fencing will be placed around the soil treatment areas to prevent pedestrians and vehicles from accidentally entering the area. d. All field work will be conducted according to a site-specific Health and Safety Plan and only properly trained personnel will be employed. The Health and Safety Plan incorporates Department, Cal OSHA and Federal worker health and safety regulations requirements. Workers will be trained for hazardous waste handling and will be properly equipped for the material to be handled. Licensed Hazardous Waste contractors will be used. e. Organochlorine pesticide contamination at the site is limited to the top 2 feet. In February 2005, groundwater was encountered at 40 feet below ground surface. No impacts on groundwater will occur and no groundwater sampling is recommended as part of the remedial work on this property.

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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