Pipeline Rehabilitation N-1

Summary

SCH Number
2011068226
Lead Agency
San Diego, City of (City of San Diego)
Document Title
Pipeline Rehabilitation N-1
Document Type
NOE - Notice of Exemption
Received
Posted
6/29/2011

Document Description
This project proposes to rehabilitate approximately 44,510 linear feet (8.43 miles) of existing 8-inch sewer pipeline primarily within the paved right of way that includes rehabilitating 26 manholes (MHs), installing 37 new cleanouts and 8 new MHs, rehab or modified sewer laterals, as well as 24 pipeline point repairs. Some improvements would occur in ornamental landscape areas. No disturbance to native vegetation is proposed. Excavation of the area would occur primarily over existing pipeline trenches, and previously disturbed soil. In all instances, the project combined with the related scope has been identified to occur in areas classified as 'non-sensitive.' Two methods of sewer main rehabilitation may be used for this project, both utilizing existing MHs and/or cleanouts. Both Require access from two MHs and or a MH and cleanout for each pipe segment: 1) Cured in place pipe (CIPP) liner is pulled through the sewer main, cured used hot water or steam, and cut at both manholes; and 2) Ribloc (spiral) liner is pulled through the sewer main as plastic strips and then formed a pipe to create a new pipeline, within the existing pipe. In areas where a secondary sewer MH/cleanout access is required, a new MH/cleanout shall be installed. Depth of new manholes, spot/point repairs would occur in existing disturbed trench, varying in external point repair may occur in portions of pipe that require repair (i.e. due to offset joints, sags, or intruding laterals). Internal point repairs use the above methods, and involve similar methods as the rehabilitation and are contained solely within the pipe. External point repairs involve excavation of an approximate 3'W x10'L area, from the ground surface to the existing pipeline.

Contact Information
Myra Herrmann
City of San Diego
Development Services Department 1222 First Avenue, MS 501
San Diego, CA 92101

Phone : (619) 446-5372

Location

Cities
San Diego
Counties
San Diego

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
S;15301,15302
Reasons for Exemption
Existing Facilities and Replacement/Reconstruction.

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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