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NOTES
1. SEE GENERAL NOTES ON THIS SHEET.
2. DESIGN WATER QUALITY FLOWRATE: 1.993 CFS
3. DESIGN PEAK 100-YR BYPASS FLOWRATE: 4.8767 CFS
COMBINED BYPASS AND OIL/WATER SEPARATOR VAULT: ROWS-067
C501-6A SCALE: NTS
GENERAL BYPASS SOWS NOTES
1. ALL DIMENSIONS SHOWN REPRESENT INTERIOR OF CONCRETE LINED STEEL STRUCTURE. SEE STRUCTURAL DETAILS FOR
STRUCTURAL DESIGN AND REINFORCEMENT INFORMATION.
2. PIPE AND COALESCING PLATE PACK SUPPORT/HOLD DOWN SHALL BE ALUMINUM OR STEEL AND BE ANCHORED AT A
MAXIMUM SPACING OF 36". ATTACH PIPE SUPPORTS TO STRUCTURE WITH 5/8-INCH STAINLESS STEEL EXPANSION BOLTS
OR EMBED THE SUPPORTS INTO THE STRUCTURE WALL.
3. THE RISERS AND TEES SHALL BE FABRICATED FROM ONE OF THE FOLLOWING MATERIALS:
0.060" CORRUGATED ALUMINUM ALLOY DRAIN PIPE
0.064" CORRUGATED ALUMINIZED STEEL DRAIN PIPE
0.060" ALUMINUM ALLOY FLAT SHEET, IN ACCORDANCE WITH ASTM B 209, 5052 H32 OR EPS
4. FRAMES AND LADDERS OR STEPS ARE TO BE OFFSET SO THAT: THE SHEAR GATE IS VISIBLE FROM THE TOP AND THE
CLIMB -DOWN SPACE IS CLEAR OF THE RISER AND GATE.
5. RESTRICTOR PLATE ORIFICE OPENING IS TO BE CUT ROUND AND SMOOTH.
6. THE SHEAR GATE SHALL BE MADE OF ALUMINUM ALLOY IN ACCORDANCE WITH ASTM B 26 AND ASTM B 275, DESIGNATION
ZG32A; OR CAST IRON IN ACCORDANCE WITH ASTM A 48, CLASS 308. THE LIFT HANDLE SHALL BE MADE OF A SIMILAR
METAL TO THE GATE (TO PREVENT GALVANIC CORROSION), IT MAY BE OF SOLID ROD OR HOLLOW TUBING, WITH
ADJUSTABLE HOOK AS REQUIRED. A NEOPRENE RUBBER GASKET IS REQUIRED BETWEEN THE RESTRICTOR PLATE MOUNTING
FLANGE AND THE GATE FLANGE. INSTALL THE GATE SO THAT THE LEVEL -LINE MARK IS LEVEL WHEN THE GATE IS OPEN.
THE MATING SURFACES OF THE LID AND THE BODY SHALL BE MACHINED FOR PROPER FIT. ALL SHEAR GATE BOLTS SHALL
BE STAINLESS STEEL.
7. THE SHEAR GATE MAXIMUM OPENING SHALL BE CONTROLLED BY LIMITED HINGE MOVEMENT, A STOP TAB, OR SOME OTHER
DEVICE.
8. ALTERNATIVE SHEAR GATE DESIGNS ARE ACCEPTABLE IF MATERIAL SPECIFICATIONS ARE MET AND FLANGE BOLT PATTERN
MATCHES.
9. COALESCING PLATE SHALL BE MADE OF STAINLESS STEEL OR POLYPROPYLENE AND SHALL BE SECURELY BUNDLED IN
PACKS SO THAT THEY CAN BE REMOVED AS UNITS. PLATES WITHIN EACH PACK SHALL BE INCLINED AT 45° TO 60° FROM
THE HORIZONTAL, HAVE A MINIMUM SPACING OF 1/2-INCH AND HAVE CORRUGATIONS. THE PLATE PACK SHALL HAVE A
MINIMUM OF 6-INCHES OF SEPARATION FROM THE BOTTOM OF THE VAULT AND 1-FOOT OF CLEARANCE FROM THE TOP
OF THE PLATE PACK TO THE BOTTOM OF THE VAULT LID.
10. THE ENTIRE SPACE BETWEEN THE SIDES OF THE PLATE PACK(S) AND THE INTERIOR VAULT WALL SHALL BE FILLED WITH A
SINGLE PIECE OF REMOVABLE POLYETHYLENE FOAM TO PREVENT SHORT-CIRCUITING OF THE PLATE PACK(S).
11. MANUFACTURER SHALL PROVIDE CALCULATIONS CONFIRMING THE PLATE PACK MEET THE DESIGN REQUIREMENTS OF THE
2017 CITY OF RENTON STORMWATER DESIGN MANUAL BASED ON THE FOLLOWING INFLUENT AND EFFLUENT CRITERIA:
OIL SPECIFIC GRAVITY 0.88
OPERATING TEMPERATURE 50°
INFLUENT OIL CONCENTRATION 100 PPM
MEAN OIL DROPLET SIZE 130 MICRONS
OIL RISE RATE 0.033 FT/MIN
FLOW RATE SEE DETAIL WQ FLOW
EFFLUENT OIL CONCENTRATION 10 PPM
100% SIZE COLLECTED 60 MICRONS
12. ALL INTERIOR VAULT BAFFLES AND WEIRS SHALL BE CONCRETE OR STAINLESS STEEL AND SHALL BE SECURELY FASTENED
TO THE VAULT. PAINTING OR OTHER COATING OF METAL PARTS FOR CORROSION RESISTANCE IS NOT ALLOWED.
13. LIDS SHALL MEET LOADING AND LIFT REQUIREMENTS SHOWN ON SHEET C501-1 C.
14. LINK -SEAL MODULAR SEALS SHALL BE PROVIDED AT EXTERIOR WALL PENETRATIONS AND INSTALLED PER MANUFACTURER'S
RECOMMENDATIONS. SEE STRUCTURAL PLANS FOR ADDITIONAL WALL PENETRATION DETAILS.
15. PERMANENT WATER QUALITY TREATMENT FACILITIES SHALL NOT BE USED TO CONVEY OR CONTAIN CONSTRUCTION STORM
WATER. NEW FACILITIES SHALL BE KEPT OFFLINE UNTIL PROJECT IS COMPLETE. THE CONTRACTOR SHALL CLEAN AND FLUSH
ALL PARTS OF THE SYSTEM PRIOR. SEE GENERAL NOTES ON SHEET C501-1A AND C501-1B.
16. SEE STRUCTURAL SHEETS SS01 THROUGH SS07 FOR VAULT STRUCTURE DETAILS.
R-401461
IN COMPLIANCE WITH CITY OF RENTON STANDARDS
iBergerABAMV3 CIVIL PERMIT SET DEVELOPMENT ENGINEERING
��
Ann Fowler 12/14/2018
CALL 48 HOURS '
BEFORE YOU DIG 33301 9th Avenue South, Suite 300
DESIGN BY: BERGERABAM DATE 10/22/2018 SURFACE WATER UTILITY
1- 800- 424- 5555 Federal Way, Washington 98003-2600
(206) 431-2300 Fax:(206) 431-2250 "*
1 1 1 rstraka 12/14/2018
SYM REVISION BY APPROVED DATE SYM REVISION BY APPROVED DATE DRAWN DATE SUBTITLE CURRENT REVISION SYMBOL DATE
ACCEPTABILITY HL 10/09/18 STORM DETAILS C180242 O R G 10/09/18
ORIG MITIGATION HANGAR C180242 ABAM SPT 10/09/18 ��N P. T THIS DESIGN AND/OR CHECKED
of WAsx,
SPECIFICATION IS APPROVED SPT 10/09/18 SHEET
APPROVED BY DEPT. DATE ENGINEER 10 �� 18 TITLE MITIGATION HANGAR
CHECKED C501-6P C54
STI
RENTON SITE
�o R 31271 o ww JOB N0. COMP NO.
���SIONAL �APPROVED C 180242
APPROVED CIVIL MASTER SITE RENTON, WA DWG NO. RTN-YD-0501-6P