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WASTEWATER UTILITY STANDARD NOTES
1. ALL WORK AND MATERIAL SHALL BE IN CONFORMANCE WITH THE STANDARDS AND SPECIFICATION OF THE CITY
OF RENTON PUBLIC WORKS DEPARTMENT AND THE LATEST EDITION OF THE WSDOT/APWA STANDARDS AND
SPECIFICATIONS,AS APPROVED AND MODIFIED BY THE CITY OF RENTON STANDARD PLANS&SPECIFICATIONS.
A SET OF APPROVED PLANS SHALL BE KEPT ON SITE AT ALL TIMES DURING CONSTRUCTION.
2. DATUM FOR VERTICAL CONTROL SHALL BE NORTH AMERICAN VERTICAL DATUM 1988.HORIZONTAL CONTROL
SHALL BE NORTH AMERICAN DATUM 1983/1991 UNLESS OTHERWISE APPROVED BY THE CITY.BENCHMARKS
AND MONUMENTS SHALL BE REFERENCED ON THE APPROVED PLANS.
3. A PRE-CONSTRUCTION CONFERENCE AND A 24-HOUR NOTICE SHALL BE REQUIRED PRIOR TO STARTING NEW
CONSTRUCTION.IT SHALL BE THE CONTRACTOR'S RESPONSIBILITY TO SECURE ALL NECESSARY PERMITS,
INCLUDING STREET USE PERMITS,PRIOR TO STARTING CONSTRUCTION.INSPECTION WILL BE ACCOMPLISHED
BY A REPRESENTATIVE OF THE CITY. IT SHALL BE THE CONTRACTOR'S RESPONSIBILITY TO NOTIFY THE PUBLIC
WORKS INSPECTOR 24 HOURS IN ADVANCE OF BACKFILLING ALL CONSTRUCTION.
4. THE HOURS OF WORK IN THE STREET RIGHT-OF-WAY SHALL BE PER CITY SPECIFICATIONS ON WEEKDAYS
UNLESS OTHERWISE APPROVED IN WRITING BY THE PUBLIC WORKS DEPARTMENT.AN APPROVED TRAFFIC
CONTROL PLAN MUST BE OBTAINED PRIOR TO BEGINNING ANY WORK WITHIN THE PUBLIC RIGHT-OF-WAY.
5. CONTRACTOR IS SOLELY RESPONSIBLE FOR THE MEANS,METHODS AND SEQUENCES OF CONSTRUCTION AND
FOR THE SAFETY OF WORKERS AND OTHERS ON THE CONSTRUCTION SITE IN ACCORDANCE WITH LOCAL,
STATE AND FEDERAL REQUIREMENTS.
6. ALL LOCATIONS OF EXISTING UTILITIES SHOWN ARE APPROXIMATE AND IT SHALL BE THE CONTRACTOR'S
RESPONSIBILITY TO VERIFY THE TRUE AND CORRECT LOCATION SO AS TO AVOID DAMAGE OR DISTURBANCE.
THE CONTRACTOR SHALL COMPLY WITH THE REQUIREMENTS OF RCW 19.122. A DIG TICKET SHALL BE
OBTAINED A MINIMUM OF TWO BUSINESS DAYS PRIOR TO STARTING ANY EXCAVATION.THE CONTRACTOR
SHALL HAVE A COPY OF THE DIG TICKET ON SITE AT ALL TIMES.
7. BACKFILL SHALL BE PLACED EQUALLY ON BOTH SIDES OF THE PIPE IN LAYERS WITH A LOOSE AVERAGE DEPTH
OF 12-INCHES,MAXIMUM DEPTH 18-INCHES,THOROUGHLY COMPACTING EACH LAYER TO 95 PERCENT OF
MAXIMUM DENSITY.THESE COMPACTED LAYERS MUST EXTEND FOR ONE PIPE DIAMETER ON EACH SIDE OF THE
PIPE OR TO THE SIDE OF THE TRENCH.MATERIALS TO COMPLETE THE FILL OVER THE PIPE SHALL BE
EQUIVALENT TO BANK RUN GRAVEL FOR TRENCH BACKFILL(9-03.19).
8. SANITARY SEWER PIPE SHALL BE POLYVINYL CHLORIDE(PVC)RUBBER-GASKETED ASTM D 3034,SDR 35,
C900/C905 OR DUCTILE IRON CLASS 50,UNLESS OTHERWISE APPROVED BY THE CITY.
9. SANITARY SEWER PIPES SHALL NOT BE LOCATED UNDER ANY STRUCTURE(WALL,BUILDING FOUNDATION,ETC.)
UNLESS APPROVED BY THE CITY.IF A SANITARY SEWER IS TO BE LOCATED UNDER ANY STRUCTURE(WALL,
BUILDING FOUNDATION,ETC.),IT SHALL BE DESIGNED BY A PROFESSIONAL ENGINEER LICENSED IN THE STATE
OF WASHINGTON IN ACCORDANCE WITH STANDARD DETAIL 412.
10. OPEN-CUT ROAD CROSSINGS FOR UTILITY TRENCHES ON EXISTING TRAVELED ROADWAYS SHALL BE
BACKFILLED WITH CRUSHED SURFACING AGGREGATE(WSDOT SPECIFICATION 9-03.9(3)AND MECHANICALLY
COMPACTED UNLESS OTHERWISE APPROVED BY THE CITY.
11. ALL PIPE AND APPURTENANCES SHALL BE LAID ON A PROPERLY PREPARED FOUNDATION IN ACCORDANCE WITH
THE STANDARDS AND SPECIFICATION OF THE CITY AND THE LATEST EDITION OF THE WSDOT/APWA STANDARDS
AND SPECIFICATION AS APPROVED AND MODIFIED BY THE CITY IN THE RENTON STANDARD PLANS&
SPECIFICATIONS.THIS SHALL INCLUDE NECESSARY LEVELING OF THE TRENCH BOTTOM OR THE TOP OF THE
FOUNDATION MATERIAL TO A UNIFORM GRADE SO THAT THE ENTIRE LENGTH OF THE PIPE WILL BE SUPPORTED
ON A UNIFORMLY DENSE,UNYIELDING BASE.PIPE BEDDING SHALL BE IN ACCORDANCE WITH STANDARD PLAN
405.
12. ALL DISTURBED AREAS SHALL BE SEEDED AND MULCHED OR OTHERWISE STABILIZED TO THE SATISFACTION OF
THE CITY FOR THE PREVENTION OF ON-SITE EROSION BOTH DURING CONSTRUCTION AND AFTER THE
COMPLETION OF CONSTRUCTION IN ACCORDANCE WITH THE CURRENT SURFACE WATER DESIGN MANUAL.
13. THE CONTRACTOR SHALL PROVIDE THE CITY OF RENTON WITH A RECORD DRAWING OF THE SANITARY SEWER
SYSTEM WHICH HAS BEEN STAMPED AND SIGNED BY A LICENSED PROFESSIONAL ENGINEER OR LICENSED
PROFESSIONAL SURVEYOR.
v o, . ST . PLAN-413
♦ PUBLIC WORKS WASTEWATER UTILITY APPROVED:
DEPARTMENT STANDARD NOTES Martin Pastuchao/26/2020
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Public Works Administrator DATE