eTS 6287001 Line 1018 Mile Post 9.1 Exposure Repair Project


SCH Number
Public Agency
California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB)
Document Title
eTS 6287001 Line 1018 Mile Post 9.1 Exposure Repair Project
Document Type
NOE - Notice of Exemption
Document Description
The Project will replace approximately 170-feet of the exposed 30-inch high-pressure natural gas transmission pipeline 1018 in Borrego Canyon Wash. Un-grouted pre-cast articulated concrete revetment mats and rip-rap will be installed across Borrego Canyon Wash to prevent future erosion of the pipeline. The articulate concrete revetment mats are designed to be semi-porous and will support natural re-vegetation. The articulate concrete revetment mats and riprap dissipation structures have been designed to maintain the current grade and prevent future degradation of the streambed after the pipeline has been replaced. The Project activities will entail excavation, abatement, fabricating new pipeline, hydrotesting, performing tie-in operations, backfilling and compacting soil.

Contact Information

Claudia Tenorio
Agency Name
Santa Ana Regional Water Quality Control Board
Job Title
Senior Environmental Scientist (Supervisory)
Contact Types
Lead/Public Agency


Southern California
Other Location Info
City of Irvine in Orange County
Other Information
0.75 miles east of Interstate 5 and immediately south of the El Toro Airfield

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
15301 Existing Facilities
Reasons for Exemption
The Project involves the repair, maintenance or minor alteration of existing public or private structures, facilities with negligible or no expansion of existing or former use. The type of 'existing facilities' for this Project falls under Class 1(b) for existing facilities of both investor and publicly-owned utilities used to provide electric power, natural gas, sewerage, or other public utility services.


Notice of Exemption

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