Standard Specifications

The Sanitary Sewer and Recycled Water Standards (Standard Specifications) govern requirements, design, and all work in connection with main sewer, public and private laterals, and recycled water systems construction within the NapaSan service area (PDF). For questions about the Standard Specifications, please contact the NapaSan Engineering Department at 707-258-6000.

The Standard Specifications may be updated periodically. Please check that you have the most up-to-date version before designing or constructing your project.

Sections & Sheets

Standard Specifications	Revision Date
Complete Document (PDF)	June 2018
Table of Contents (PDF)	June 2018
Volume 1: General Conditions (PDF)	January 2016
Volume 2: Sanitary Sewer (PDF)	June 2018
Volume 3: Recycled Water (PDF)	June 2018

Standard Details: Sanitary Sewer	Revision Date
SS-1: Sanitary Sewer Cleanout (PDF)	January 2016
SS-2: Standard Residential Public Lateral for New Construction (PDF)	January 2016
SS-3: Sewer Lateral Crossing Above Utility, No Conflict in Grade (PDF)	June 2018
SS-4: Simple Sewer Lateral Break, Sewer Below Utility, No Conflict in Grade (PDF)	May 2012
SS-5: Simple Sewer Lateral Break with Conflict in Grade (PDF)	May 2012
SS-6: Sewer Lateral Layout 1 (PDF)	May 2012
SS-7: Sewer Lateral Layout 2 (PDF)	January 2016
SS-8: Drop Type Manhole (PDF)	June 2017
SS-9: Standard Pre-Fab Manhole (Sheet 1) (PDF)	June 2018
SS-9A: Standard Pre-Fab Manhole (Sheet 2) (PDF)	June 2017
SS-10: Barrel Section Joints for Standard Pre-Fab Manhole (PDF)	January 2016
SS-11: Typical Manhole Using Impression Ring (PDF)	January 2016
SS-12: Pre-Cast Concrete 48 Inch by 24 Inch Reducer Slab for Manholes (PDF)	May 2012
SS-13: Typical Method for Setting Appurtenances (PDF)	May 2012
SS-14: Standard 24 Inch Manhole Frame and Cover (PDF)	May 2012
SS-15: Bolt-Down 24 Inch Manhole Frame and Cover (PDF)	May 2012
SS-16: 36 Inch Diameter Manhole Frame and Cover (PDF)	May 2012
SS-17: Typical Installation Irrigation “Subtraction” Meter (PDF)	May 2012
SS-18: Standard Casing Installation (PDF)	June 2018
SS-19: Redwood Check Dam (PDF)	May 2012
SS-20: Trench Dams (PDF)	June 2018
SS-22: Three Stage Sand and Grease Interceptor (PDF)	January 2016
SS-23: Sanitary Sewer Sampling Box (PDF)	January 2016
SS-24: Standard Trench Section (PDF)	January 2016
SS-25: Standard Tracer Wire Installation Detail (PDF)	January 2016
SS-26: Abandoned Pipe Plug (PDF)	May 2012
SS-27: Abandoned Manhole (PDF)	May 2012
SS-28: Flush Hole (PDF)	January 2016
SS-29: Trench Section for Replacement/Repair of Residential Sewer Lateral (PDF)	January 2016

Standard Details: Recycled Water	Revision Date
RW-1: Concrete Anchor Blocks for Vertical Bends (PDF)	January 2016
RW-2: Concrete Thrust Blocks for Horizontal Bends (PDF)	January 2016
RW-3: Vertical Offset (PDF)	May 2012
RW-4: Recycled Water Trench Section (PDF)	January 2016
RW-5: Temporary Blow-off and/or Metered Connection for Mains Under Construction (PDF)	May 2012
RW-6: 2 Inch Blow-Off Assembly (PDF)	January 2016
RW-7: 3/4 inch and 1 inch Water Service Lateral for 3/4 Inch and 1 inch Meters (PDF)	July 2012
RW-8: 2 Inch Water Service Lateral for 2 Inch or 1-1/2 Inch Meter (PDF)	May 2012
RW-9: 4 Inch Water Service Lateral for 3 Inch Meter (PDF)	May 2012
RW-10: 4 Inch Water Service Lateral for 4 Inch Meter (PDF)	May 2012
RW-11: 6 Inch Water Service Lateral for 6 Inch Meter (PDF)	May 2012
RW-12: Reduced-Pressure Backflow Device (PDF)	January 2016
RW-13: Gate Valve (PDF)	January 2016
RW-14: Pressure Reducing Valves (PDF)	May 2012
RW-15 1 Inch Air Release and Vacuum Valve Assembly (PDF)	May 2012
RW-16: 2 Inch Air Release and Vacuum Valve Assembly (PDF)	May 2012
RW-17: Recycled Water Line Notes (PDF)	January 2016
RW-18: Recycled Water Sign (PDF)	May 2012

Standard Specifications

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