City of Los Angeles, Department of Water and Power Variance Request
Summary
SCH Number
2000128082
Public Agency
Department of Toxic Substances Control
Document Title
City of Los Angeles, Department of Water and Power Variance Request
Document Type
NOE - Notice of Exemption
Received
Posted
12/4/2000
Document Description
The City of Los Angeles, Department of Water and Power (LADWP) has received a varience from hazardous waste manifest requirements under Section 25160 fo the California Health and Safety Code, and Sections 66262.20 and 66262.23 of the California Code of Regulations (CCR), Title 22. The variance allows the use of a bill in lading in lieu of a manifest to transport and dispose of the arsenic and copper contaminated backwash solids that have been classified as a "Special Waste" by the Department of Toxic Substances Control (DTSC), Human and Ecological Risk Division (HERD) to a Class I hazardous waste facility authorized to receive the waste.
In providing quality potable water to the City of Los Angeles, LADWP imports water from the Owens River Valleys, and the water is treated at the LADWP where the deep beds filtration units remove floc and impurities in the water. Arsenic is inherent to the surface waters of the Owens River, and copper sulfate is used for algae control in the treatment process. These filters are periodically back washed, or cleaned by reversing the direction of water flow to remove solids contaminated with arsenic and copper. The removal of arsenic and copper is essential in providing safe quality drinking water to the residents of Los Angeles. The backwash water is diverted to settling ponds (eight total) where solids are allowed to concentrate and settle. On an annual basis, the ponds are drained and approximately 20,000 tons of contaminated solids are removed, characterized, and transported to a permitted facility. The annual removal of the contaminated solids takes approximately two to three weeks to complete, weather permitting.
Contact Information
Name
Maria Salomon
Agency Name
Department of Toxic Substances Control
Contact Types
Lead/Public Agency
Phone
Location
Counties
Los Angeles
Notice of Exemption
Exempt Status
Other
Type, Section or Code
Title 14, Section 15061(b)(3)
Reasons for Exemption
The issuance of this variance does not create a potential hazard to human health and safety or the environment.
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.