Closure of Wastewater Retention Basin for Southern California Edison, San Bernardino Generating Station


SCH Number
Public Agency
California Department of Toxic Substances Control (DTSC)
Document Title
Closure of Wastewater Retention Basin for Southern California Edison, San Bernardino Generating Station
Document Type
NOE - Notice of Exemption
Document Description
DTSC has reviewed the closure sampling and determined that (a) the site Wastewater Retention Basin Unit is properly closed, (b) that no contamination above background levels is present in soil, and (c) that no further action is necessary to complete the closure of the unit and no post-closure maintenance of the unit is required.

Contact Information

Chia-Rin Yen
Agency Name
Department of Toxic Substances Control
Contact Types
Lead/Public Agency


San Bernardino

Notice of Exemption

Exempt Status
Type, Section or Code
General Section 15061(b)(3)
Reasons for Exemption
No further action is needed to close the retention basin because the closure standards for an unrestricted land use have been met: Sampling indicates that all contaminated soil beneath the retention basin was removed by SCE to background levels. Therefore, there is no risk to human health. Additional sampling indicates that the groundwater quality was not impacted by the past operation of the retention basin. The approval of this CDR report is merely administrative and will not result in any additional investigation or remediation activities for the site. Therefore, there is no possibility of significant impact to human health and the environment. While this site is listed in the Hazardous Substances Site List pursuant to the Government Code 65962.5 the listing is due to a leak from a gasoline underground storage tank in 1987. The groundwater under the retention basin was not impacted by the underground tank activities. The groundwater monitoring for the retention basin did not detect any compound associated with petroleum hydrocarbons. Therefore it is clear that this release was unrelated to the regulated unit.

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 or via phone at (916) 445-0613.

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