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BMP TS.13 Post -Construction Soil Quality and Depth
Purpose and Definition
Naturally occurring (undisturbed) soil and vegetation provide important
stormwater functions including: water infiltration; nutrient, sediment,
and pollutant adsorption; sediment and pollutant biofiltrotion; water
interflow storage and transmission; and pollutant decomposition. These
functions are largely lost when development strips away native soil and
vegetation and replaces
it with minimal topsoil and sod. Not only are these important
stormwater functions lost, but such landscapes themselves become
pollution- generating pervious surfaces due to increased use of
pesticides, fertilizers and other landscaping and household/industrial
chemicals, the
concentration of pet wastes, and pollutants that accompany roadside
litter.
Establishing soil quality and depth regains greater stormwater functions
in the post development landscape, provides increased treatment of
pollutants and sediments that result from development and habitation,
and minimizes the need for some landscaping chemicals, thus reducing
pollution through prevention.
Applications and Limitations
Establishing a minimum soil quality and depth is not the some as
preservation of naturally occurring soil and vegetation. However,
establishing a minimum soil quality and depth will provide improved
on -site management of stormwater flow and water quality.
Soil organic matter can be attained through numerous materials such
as compost, composted woody material, biosolids, and forest product
residuals. It is important that the materials used to meet the soil
quality and depth BMP be appropriate and beneficial to the plant
cover to be established. Likewise, it is important that imported
topsoils improve soil conditions and do not have on excessive percent
of clay fines.
Design Guidelines
251658240 Soil retention. The duff layer and native topsoil should be
retained in an undisturbed state to the maximum extent practicable. In
any areas requiring grading remove and
stockpile the duff layer and topsoil on site in a designated, controlled
area, not adjacent to public resources and critical areas, to be reapplied
to other portions of the site where feasible.
251658240 Soil quality All areas subject to clearing and grading that
have not been covered by impervious surface, incorporated into a
drainage facility or engineered as structural fill or slope shall, at project
completion, demonstrate the following:
I. A topsoil layer with a minimum organic matter content of ten percent
dry weight in planting beds, and 5% organic matter content (based on a
loss -on -ignition test) in turf areas, and a pH from 6.0 to 8.0 or
matching the pH of the original undisturbed soil. The topsoil layer shall
have a minimum depth of eight inches except where tree roots limit the
depth of incorporation of amendments needed to meet the criteria.
Subsoils below the topsoil layer should be scarified at least 4 inches with
some incorporation of the upper material to avoid stratified layers, where
feasible.
2. Planting beds must be mulched with 2 inches of organic material
Quality of compost and other materials used to meet the organic content
requirements:
The organic content for -pre-approved" amendment rates can be met only
using compost that meets the definition of -composted materials" in WAC
173-350-220. This code is available online at:
<http://www.ecy.wo.govlprogromslswfolfacilitiesl350.html>
Compost used in bioretention areas should be stable, mature and derived
from yard debris, wood waste, or other organic materials that meet the
intent of the organic soil amendment specification. Biosolids and manure
composts can be higher in bio-available phosphorus than compost derived
from yard or plant waste and therefore are not allowed in bioretention
areas due to the possibility of exporting bio-available phosphorus in
effluent.
The compost must also have an organic matter content of 35% to 657,
and a carbon to nitrogen ratio below 25:1.
The carbon to nitrogen ratio may be as high as 35:1 for plantings
composed entirely of plants native to the Puget Sound Lowlands region.
Calculated amendment rates may be met through use of composted
materials as defined above; or other organic materials amended to meet
the carbon to nitrogen ratio requirements, and meeting the contaminant
standards of Grade A Compost.
The resulting soil should be conducive to the type of vegetation to be
established.
251658240 Implementation Options: The soil quality design guidelines
listed above can be met by using one of the methods listed below.
I.Leave undisturbed native vegetation and soil, and protect from compaction
during construction.
Amend disturbed soil according to the following procedures:
Scarify subsoil to a depth of one foot
In planting beds, place three inches of compost and till in to an eight -inch
dep th.
In turf areas, place two inches of compost and till in to an eight -inch
dep th.
Apply two to four inches of arborist wood chip, coarse bark mulch, or
compost mulch to planting beds after final planting.
Alternatively, disturbed soil can be amended on a site -customized manner
so that it meets the soil quality criteria set forth above, as determined by
a licensed engineer, geologist, landscape architect, or other person as
approved by Snohomish County.
Stockpile existing topsoil during grading, and replace it prior to planting.
Stockpiled topsoil must be amended if needed to meet the organic matter
and depth requirements by following the procedures in method (2) above).
Import topsoil mix of sufficient organic content and depth to meet the
organic matter and depth requirements.
More than one method may be used on different portions of the some site.
Soil that already meets the depth and organic matter quality standards, and
is not compacted, does not need to be amended.
Maintenance
251658240 Soil quality and depth should be established toward the end
of construction and once established, should be protected from compaction,
such as from large machinery use, and from erosion.
251658240 Soil should be planted and mulched after installation.
251658240 Plant debris or its equivalent should be left on the two soil
surface to replenish organic matter.
DocuSign Envelope ID: 6EEC F5B6-602A-4E4A-8436-A317AA638878
PRIVATE RDOF ORAIN
COLLECTOR PIPE;
LOT LINE. TYP S' DIA MIN.,
6' CIA MIN. ROOF DRAIN PRIVATE TYPE 1 05%MIN. SLOPE.
5' MIN, CATCH BASIN 2 FT MIN. COVER
STUB WITH CLEANOUT (TYP.] (TYP,
HOUSE FYP.)
I I I
I I I
3' MIN.
io
PRIVATE JOINT SD SD SD SD
UTILITY EASEMENT CURB, SIDEWALK � CITY STORM DRAIN (SO) SYSTEM
S, MIN. WIDTH
R.O.W. LINE PRIVgTE STORM DRAIN (SD) SYSTEM,
0' MIN. CIA PIPE, SEE NOTE 1
ROOF DRAIN TO CONNECT INTO Cr3Y
CATCH BASIN =C MIN. SIZE TYPE I
CLEANOLIT, TYP AT EVERY W.
W 2ND AS' DEMO. AND AT 1 ov MAX
SPACING ON STRAIGHT SECTIONS
NOTES:
I. SEE STD. PLANS 4M.00 AND 220.10 FOR PIPE MATERIALS AND MINIMUM COVER REQUIREMENTS.
2. THE ROOF AND FOOTING DRAIN SYSTEMS ARE PRIVATELY MAINTAINED-
5. FLOW PATTERN SHOULD BE TO THE NEAREST CB IF GRADE ALLOWS, OR TO THE NEXT DOWNSTREAM CS
4. ROOF DRAIN COLLECTORS MUST BE ANALYZED FOR CAPACITY. SIZED FOR 2E-YEAR PEAK FLOW.
5. PVC PIPE MUST BE SOR 35OR THI CKER AND MEET THE AEQUI REMENTS OF ASTM DX04,
S. PVC PIPE USED IN PRIVATELY MAINTAINED DRAINAGE SYSTEMS MUST BE WHITE IN COLOR.
7, SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS.
uNIESS OTHE R W SE NOTE D, DRAW I NG IS NOT TO SCALE (NTS]
STD. PLAN - 225.00
PUBLICWO K
TYPICAL PRIVATE STORM DRAIN
9PROWD
❑
COLLECTION SYSTEM
GAZ 9/28/2018 1
:45 A
yf �. DATE
SAZEI DESIGN GROUP, LLC
6608 110TH AVE. N.E.
KIRKLAND, WA. 98033
TEL. (425) 212-2280
FAX. (425) 889-6887
DocuSign Envelope ID: 6EECF5B6-602A4E4A-B436-A317AA638878
EROSION AND SEDIMENT CONTROL (ESC) STANDARD PLAN NOTES -
THE FOLLOWING IS A LISTING OF GENERAL NOTES THAT SHALL BE INCORPORATED IN THE END SION AND SEDIMENT CONTROL (ESC) PLAN SET. ALL THE NOTES ON I HI:
LIST MAY NOT PERTAIN TO EVERY PROJECT. THE APPLICANT OR OWNER. HEREBY REFERRED TO AS APPLICANT. MAY STRIKE OUT IRRELEVANT NOTES IF NOT
APPLICABLE TO THE PROJECT. HOWEVER. THE APPLICANT SHALL NOT RENUMBER NOR EDIT THE REMAINING NOTES. IF ADDITIONAL NOTES ARE NEEDED FOR SPECIFI[;
ASPECTS. THEY SHALL BE ADDED AFTER THE ESC STANDARD PLAN NOTES.
1. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRE•CONSTRUCT(ON MEETING SHALL BE HELD AMONG THE CITY OF RENTON, HEREBY
REFERRED TO AS THE CITY, THE APPLICANT, AND THE APPLICANT'S CONTRACTOR.
2. THE APPLICANT IS RESPONSIBLE FOR OBTAINING THE WASHINGTON STATE DEPARTMENT OF ECOLOGY (ECOLOGY) CONSTRUCTION 5TORMWATER GENERAL
PERMIT, IF IT IS REQUIRED FOR THE PROJECT. THE APPLICANT SHALL PROVIDE THE CITY COPIES OF ALL MONITORING REPORTS PROVIDED TO ECOLOGY
ASSOCIATED WITH THE CONSTRUCTION STORMWATER GENERAL PERMIT.
3. THE ESC PLAN SET SHALL INCLUDE AN ESC CONSTRUCTION SEQUENCE DETAILING THE ORDERED STEPS THAT SHALL BE FOLLOWED FROM CONSTRUCTION
COMMENCEMENT TO POST -PROJECT CLEANUP IN ORDER TO FULFILL PROJECT ESC REQUIREMENTS,
4. THE BOUNDARIES OF THE CLEARING LIMITS. SENSITIVE AREAS AND THEIR BUFFERS, AND AREAS OF VEGETATION PRESERVATION AND TREE RETENTION AS
PRESCRIBED ON THE PLANS) SHALL BE CLEARLY DELINEATED BY FENCING AND PROTECTED IN THE FIELD IN ACCORDANCE WITH APPENDIX D OF THE CITY OI
RENTON SURFACE WATER DESIGN MANUAL (RENTON SWDM) PRIOR TO THE START OF CONSTRUCTION. DURING THE CONSTRUCTION PERIOD. NO DISTURBANCE
BEYOND THE CLEARING LIMITS SHALL BE PERMITTED. THE CLEARING LIMITS SHALL BE MAINTAINED BY THE APPLICANT/ESC SUPERVISOR FOR THE DURATION OF
CONSTRUCTION.
5. STABILIZED CONSTRUCTION ENTRANCES SHALL BE INSTALLED AT THE BEGINNING OF CONSTRUCTION AND MAINTAINED FOR THE DURATION OF THE PROJECT
ADDITIONAL MEASURES, SUCH AS CONSTRUCTED WHEEL WASH SYSTEMS OR WASH PADS, MAY BE REWIRED TD ENSURE THAT ALA, PAVED AREAS ARE KEPT
CLEAN AND TRACK -OUT TO ROAD RIGHT OF WAY DOES NOT OCCUR FOR THE DURATION OFTHE PROJECT. IF SEDIMENT IS TRACKED OFFSITE. PUBLIC ROADS SHALT.
BE CLEANED THOROUGHLY AT THE END OF EACH DAY, OR MORE FREQUENTLY DURING WET WEATHER. AS NECESSARY TO PREVENT SEDIMENT FROM ENTERNG
WATERS Or THE STATE.
6. WASHOUT FROM CONCRETE TRUCKS SHALL BE PERFORMED OFF -SITE OR IN DESIGNATED CONCRETE WASHOUT AREAS ONLY. DO NOT WASH OUT CONCRETE
TRUCKS ONTO THE GROUND, OR TO STORM DRAINS OR OPEN DITCHES. ON -SITE DUMPING OF EXCESS CONCRETE SHALL ONLY OCCUR IN DESIGNATED CONCRETE
WASHOUTAREAS.
7. ALL REQUIRED ESC BMPS SHALL BE CONSTRUCTED AND IN OPERATION PRIOR TO LAND CLEARING ANDIOR CONSTRUCTION TO PREVENT TRANSPORTATION OF
SEDIMENT TO SURFACE WATER, DRAINAGE SYSTEMS AND ADJACENT PROPERTIES. ALL ESC BMPS SHALL EE MAINTAINED IN A SATISFACTORY CONDITION UNTIL
SUCH TIME THAT CLEARING ANDIOR CONSTRUCTION IS COMPLETE AND POTENTIAL FOR ON -SITE EROSION HAS PASSED. ALL ESC BMPS SHALL BE REMOVED AF T E I;
CONSTRUCTION IS COMPLETED AND THE SITE HAS SEEN STABILIZED TO ENSURE POTENTIAL FOR ON -SITE EROSION DOES NOT EXIST. THE IMPLEMENTATION
MAINTENANCE, REPLACEMENT. ENHANCEMENT, AND REMOVAL OF ESC BMPS SHALL BE THE RESPONSIBILITY OF THE APPLICANT.
S. ANY HAZARDOUS MATERIALS OR LIQUID PRODUCTS THAT HAVE THE POTENTIAL TO POLLUTE RUNOFF SHALL BE DISPOSED OF PROPERLY,
9. THE ESC BMPS DEPICTED ON THIS DRAWING ARE INTENDED TO BE MINIMUM REQUIREMENTS TO MEET ANTICIPATED SITE CONDITIONS. AS CONSTRUCTION
PROGRESSES AND UNEXPECTED OR SEASONAL CONDITIONS DICTATE, THE APPLICANT SHALL ANTICIPATE THAT MORE ESC BMPS WILL BE NECESSARY TO ENSURE
COMPLETE SILTATION CONTROL ON THE PROPOSED SITE. DURING THE CQURSE OF CONSTRUCTION. IT SHALL BE THE OBLIGATION AND RESPONSIBILITY OF THE
APPLICANT TO ADDRESS ANY NEW CONDITIONS THAT MAY BE CREATED BY THE ACTIVITIES AND TO PROVIDE ADDITIONAL ESC BMPS, OVER AND ABOVE MINIMUM
REQUIREMENTS, AS MAY BE NEEDED, TO PROTECT ADJACENT PROPERTIES AND WATER OUALITY OF THE RECEIVING DRAINAGE SYSTEM.
10. APPROVAL OF THIS PLAN IS FOR ESC ONLY. IT DOES NOT CONSTITUTE AN APPROVAL OF STORM DRAINAGE DESIGN. SIZE NOR LOCATION OF PIPES. RE5TRICTORS.
CHANNELS, OR STORMWATER FACILITIES.
11. ANY DEWATERING SYSTEM NECESSARY FOR THE CONSTRUCTION OF STORMWATER FACIU71ES SHALL BE SUBMITTED TO THE CITY FOR REVIEW AND APPROVAL.
12. ANY AREAS OF EXPOSED SOILS. INCLUDING ROADWAY EMBANKMENTS. THAT WILL NOT BE DISTURBED FOR TWO DAYS DURING THE WET SEASON [OCTOBER 1ST
THROUGH APRIL 3OTH) OR SEVEN DAYS WRING THE DRY SEASON )MAY IST THROUGH SEPTEMBER 3OTH) SHALL BE IMMEDIATELY STABILIZED WITH THE APPROVED
ESC COVER METHODS (E.G-. SEEDING. MULCHING. PLASTIC COVERING, ETC.) IN CONFORMANCE WITH APPENDIX D OF THE RENTON SWDM.
13. WET SEASON ESC REQUIREMENTS APPLY TO ALL CONSTRUCTION SITES BETWEEN OCTOBER 1ST AND APRIL 30TH, UNLESS OTHERWISE APPROVED BY THE CITY.
14. ANY AREA NEEDING ADDITIONAL ESC MEASURES. NOT REQUIRING IMMEDIATE ATTENTION. SHALL BE ADDRESSED WITHIN SEVEN (7) DAYS.
15. THE ESC BMPS ON INACTIVE &TES SHALL BE INSPECTED AND MAINTAINED AT A MINIMUM OF ONCE A MONTH OR WITHIN 24 HOURS FOLLOWING A STORM EVENT.
INSPECTION AND MA NTENANCE SHALL OCCUR MORE FREQUENTLY AS REQUIRED BY THE CITY.
16. BEFORE COMMENCEMENT OF ANY CONSTRUCTION ACTIVITY, CATCH BASIN INSERTS PER THE CITY STANDARD PLAN 216-30 SHALL BE PROVIDED FOR ALL. STORM
DRAIN INLETS DOWNSLOPE AND WITHIN 5DO FEET OF A DISTURBED OR CONSTRUCTION AREA. UNLESS THE RUNOFF THAT ENTERSTHE INLET WILL BE CONVEYED
TO A SEDIMENT POND OR TRAP. ALL CATCH BASIN INSERTS SHALL BE PERIODICALLY INSPECTED AND REPLACED AS NECESSARY TO ENSURE FULLY FUNCTIONING
CONDITION.
17. AT NO TIME SHALL SEDIMENT ACCUMULATION EXCEED 213 OF THE CAPACITY OF THE CATCH BASIN SUMP ALL CATCH BASINS AND CONVEYANCE LINES SHALL BE
CLEANED PRIOR TO PAVING THE CLEANING OPERATION SHALL NOT FLUSH SEDIMENT4.ADEN WATER INTO THE DOWNSTREAM SYSTEM
16. ANY PERMANENT STORMWATER FACILITY LOCATION USED AS A TEMPORARY SETTLING BASIN SHALL BE MODIFIED WITH THE NECESSARY ESC BMPS AND SHALL
PROVIDE ADEQUATE STORAGE CAPACITY. IF THE TEMPORARY FACILITY I$ TO ULTIMATELY FUNCTION AS AN INFILTRATION SYSTEM IN ITS PERMANENT STATE. THE
TEMPORARY FACILITY SHALL BE ROUGH GRADED SO THAT THE BOTTOM AND SIDES ARE AT LEAST THREE FEET ABOVE THE FINAL GRADE OF THE PERMANENT
FACILITY.
19. AREAS DESIGNATED ON THE PLAN(S] CONTAINING EXISTING STORMWATER FACILITIES OR ON -SITE BMPS (AMENDED SOILS. 0110RETENTION, PERMEABLE PAVEMENT.
ETC J SHALL BE CLEARLY FENCED AND PROTECTED USING ESC SNIPS TO AVOID SEDIMENTATION AND COMPACTION DURING CONSTRUCTION.
20. PRIOR TO THE BEGINNING OF THE WET SEASON (OCTOBER 1ST), ALL DISTURBED AREAS SHALL BE INSPECTED TO IDENTIFY WHICH ONES SHALL BE SODDED OR
SEEDED IN PREPARATION FOR THE WINTER RAINS. DISTURBED AREAS SHALL BE SODDED OR SEEDED WITHIN ONE WEEK OF THE BEGINNING OF THE WET SEASON
AN EXHIBIT OF THOSE AREAS TO BE SODDED OR SEEDED AND THOSE AREAS TO REMAIN UNCOVERED SNAIL RE SUBMITTED TO THE CITY FOR RENEW.
21. PRIOR TO FINAL CONSTRUCTION ACCEPTANCE, THE PROJECT SITE SHALL BE STABILIZED TO PREVENT SEDIMENT -LADEN WATER FROM LEAVING THE PROJECT SITE
ALL ESC BMPS SHALL BE REMOVED, AND STORMWATER CONVEYANCE SYSTEMS, FACILITIES, AND ON -SITE SNIPS SHALL BE RESTORED TO THEIR FULLY
FUNCTIONING CONDITION. ALL DISTURBED AREAS OF THE PROJECT SITE SHALL BE VEGETATED OR OTHERWISE PERMANENTLY STABILIZED. AT A MINIMUM.
DISTURBED AREAS SHALL BE SODDED OR SEEDED AND MULCHED TO ENSURE THAT SUFFICIENT COVER WILL DEVELOP SHORTLYAFTER FINAL APPROVAL MULCH
WITHOUT SEEDING IS ADEQUATE FOR AREAS TO BE LANDSCAPED BEFORE OCTOBER 1ST
22. ROCKERIES ARE CONSIDERED TO BE A METHOD OF BANK STABILIZATION AND EROSION CONTROL. ROCKERIES SHALL NOT BE CONSTRUCTED TO SERVE AS
RETAINING WALLS. ALL ROCKERIES IN CITY ROAD RIGHTSOF-WAY SHALL BE CONSTRUCTED IN ACCORDANCE WITH CITY STANDARDS. ROCKERIES OUTSIDE OF
ROAD RIGHTS�OF-WAY SHALL BE CONSTRUCTED IN ACCORDANCE WITH THE INTERNATIONAL BUILDING CODE.
STD. PLAN • 268.00
\� PUBLIC WORKS EROSION AND SEDIMENT CONTROL
-" DEPARTMENT STANDARD PLAN NOTES GAZ 9/28/201B 1
DATE
12-3-20 ! I N 0.
REVISION
:45
DocuSign Envelope 10:6EEC F5136.6D2A-4E4A-B4-36-A317AA638878
CONSTRUCTION ENTRANCE NOTES:
(yD� 1, DRIVEWAYS SHALL BE PAVED TO
6 THE EDGE OF THE RIGHT-OF-WAY
PRIOR TO INSTALLATION OF THE
R = 25' MIN. CONSTRUCTION ENTRANCE TO
AVOID DAMAGING OF THE
ROADWAY.
2. IT IS RECOMMENDED THAT THE
ENTRANCE BE CROWNED SO THAT
RUNOFF DRAINS OFF THE PAD
100' MIN.
INSTA LL DRIVEWAY CULVERT
IF THERE IS A ROADSIDE
DITCH PRESENT- AS PER CITY
ROAD STANDARDS
C-B' QUARRY SPALLS
GEOTEXTILE
15'MIN.
PROVIDE FULL WIDTH OF
1 NGRES&EGR ESS AREA
1Z' MIN. THICKNESS
NOTES:
1. CONDITION OF USE
1.1. CONSTRUCTION ENTRANCE SHALL BE STABILIZED WHEREVER TRAFFIC WILL BE LEAVING A CONSTRUCTION SITE AND TRAVELING ON PAVED ROADS OR OTHER
PAVED AREAS WITHIN 1.000 FEET OF THE SITE,
I FOR RESIDENTIAL CQNSTRUCTION PROVIDE STABILIZED CONSTRUCTION ENTRANCES FOR EACH RESIDENCE IN ADDITION TO THE MAIN SUED IVI SION
ENTRANCE. STABILIZED SURFACES SHALL BE OF SUFFICIENT LENGTHAWIDTH TO PROVIDE VEHICLE AOCESSIPARKI NO, BASED ON LOT SIZEJCONFIGURATION.
2. DESIGN AND INSTALLATION SPECIFICATIONS
21 A SEPARATION GEOTEXTILE SHALL BE PLACED UNDER THE SPALLS TO PREVENT FINE SEDIMENT FROM PUMPING UP INTO THE ROCK PAD. THE GEOTEXTILF
SHALL MEET THE FOLLOWING STANDARDS:
GRAB TENSILE STRENGTH EASTM D46321 200 LBS. MIN,
GRAB TENSILE ELONGATION (ASTM D4632) 3C% MAX. (WOVEN)
CBR PUNCTURE STRENGTH )ASTM 1)6241I 495 LBS. MIN.
ADS (ASTM D4751) 12045IU S- STANDARD SIEVE SIZE)
2.2, DO NOT USE CRUSHED CONCRETE, CEMENT, OR CALCIUM CHLCRI DE FOR CONSTRUCTION ENTRANCE STABILIZATION BECAUSE THESE PRODUCTS RAISE pH
LEVELS IN 57ORMWATER AND CONCRETE DISCHARGE TO SURFACE WATERS OF THE STATE IS PROH IBITED.
2.5. HOG FUEL (WOOD BASED MULCH) MAY BE SUBSTITUTED FOR OR COMBINED WITH QUARRY SPALLS IN AREAS THAT WILL NOT BE USED FOR PERMANENT ROADS
HOG FUEL IS NOT RECOMMENDED FOR ENTRANCE STABILIZATION IN URBAN AREAS, THE INSPECTOR MAY AT ANY TIME REQUIRE THE USE OF QUARRY SPALLS
IF THE HOO FUEL IS NOT PREVENTING SEDIMENT FROM BEING TRACKED ONTO PAVEMENT OR IF THE HOG FUEL IS BEING CARRIED ONTO PAVEMENT.
,A- FENCING SHALL BE INSTALLED AS NECESSARY TO RESTRICT TRAFFIC TO THE CONSTRUCTION ENTRANCE.
2.5. WHENEVER POSSIBLE, THE ENTRANCE SHALL BE CONSTRUCTED ON A FIRM, COMPACTED SUBGRADE. THIS CAN SUBSTANTIALLY INCREASE THE
EFFECTIVENESS OF THE PAD AND REDUCE THE NEED FOR MAINTENANCE.
3. MAINTENANCE STANDARDS
3.1. QUARRY SPALLS SHALL BE ADDED IF THE PAD IS NO LONGER IN ACCORDANCE WITH THE SPECIFICATIONS.
3.2. IF THE ENTRANCE I S NOT PREVENTING SEDIMENT FROM BEING TRACKED ONTO PAVEMENT, THEN ALTERNATIVE MEASURES TO KEEP THE STREETS FREE OF
SEDIMENT SHALL BE USED. THIS MAY INCLUDE STREET SWEEPING. AN INCREASE IN THE DIMENSIONS OF THE ENTRANCE. OR THE INSTALLATION OF A WHEEL
WASH. IF WASHING IS USED, IT SHALL BE DONE ON AN AREA COVERED WITH CRUSHED ROCK, AND WASH WATER SHALL DRAIN TO A SEDIMENT TRAP OR POND
ANY SEDIMENT THAT IS TRACKED ONTO PAVEMENT SHALL BE REMOVED IMMEDIATELY BY SWEEPING- THE SEDIMENT COLLECTED BY SWEEPING SHALL 13E
REMOVED OR 91AE 11-lab ON SITE. THE PAVEMENT SHALL NOT BE CLEANED BY WASHING DOWN THE STREET, EXCEPT WHEN SWEEPING IS INEFFECTIVE AND
THERE IS A THREAT TO PUBLIC SAFETY. IF IT 15 NECESSARY TO WASH THE STREETS, A STALL SUMP MUST BE CONSTRUCTED. THE SEDIMENT WOULD THEN BE
WASHED INTO THE SUMP WHERE IT CAN BE CONTROLLED AND DISCHARGED APPROPRIATELY. WASH WATER MUST BE PUMPED BACK ONTO THE SITE AND
CANNOT DISCHARGE TO SYSTEMS TRIBUTARY TO SURFACE WATERS.
3.4. ANY QUARRY SPALLS THAT ARE LOOSENED FROM THE PAD AND END UP ON THE ROADWAY SHALL BE REMOVED IMMEDIATELY.
3.S- IF VEHICLES ARE ENTERING OR EXITING THE SITES AT POINTS OTHER THAN THE CONSTRUCTION ENTRANCE(S), FENCING SHALL BE INSTALLED TO CONTROL
TRAFFIC.
UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS)
STD. PLAN - 215.10
PUBLIC WORKS PPRDVEP.
DEPARTMENT STABILIZED CONSTRUCTION ENTRANCE GAZ 9/28/2018 1
DATE
DocLISlgn Envelope ID: 6EECF5B6.602A-4E4A-B436-A317AA638878
5• MAX.
DRAINAGE GRATE TRIM
GRATE FRAME _
C_ OVERFLOW BYPASS
I
BELOW INLET GRATE DEVICE
SEDIME NT ANO OESRIS
d
FILTERED
WATER
SECTION VIEW
DRAINAGE GRATE
(RECTANGULAR GRATE SHOWN) RETRIEVAL SYSTEM (TYP.I
OVERFLOW BYPASS (TYR)
BELOW INLET GRATE DEVICE
ISOMETRIC VIEW
NOTES,
I. PROTECTION SHALL BE PROVIDED FOR ALL STORM DRAIN INLETS DOWNSLOPE AND WITHIN 500 FEET OF A DISTURBED OR
CONSTRUCTION AREA UNLESS THE RUNOFF THAT ENTERS THE CATCH BASIN WILL BE CONVEYED TO A SEDIMENT POND OR TRAP.
2. IN LET PROTECTION SHALL BE USED TO PROTECT THE DRAINAGE SYSTEM.
3. THE CONTRIBUTING DRAINAGE AREA MUST NOT BE LARGER THAN ONE ACRE.
4. SIZE THE BELOW INLET GRATE DEVICE BIGD FOR THE STORMWATER STRUCTURE IT WILL SERVICE [ 1 E.
5. THE BIGD SHALL HAVE ABUILT4N HIGH•F LOW RELIEF SYSTEM {OVERFLOW BYPASS).
6. THE RETRIEVAL SYSTEM MUST ALLOW REMOVAL OF THE BIGD WITHOUT SPILLING THE COLLECTED MATERIAL.
7, PERFORM MAINTENANCE IN ACCORDANCE WITH STANDARD SPECIFICATION 6-01,3f 15).
8. ANY SEDIMENT IN THE CATCH BASIN INSERT SHALL BE REMOVED WHEN THE SEDIMENT HAS FILLED ONE-THIRD OF THE AVAILABLE
STORAGE. THE FILTER MEDIA FOR THE INSERT SHALL BE CLEANED OR REPLACED AT LEAST MONTHLY
UNLESS OTHERWISE NOTED, DRAWING G NOT TO SCALE (NTS}
STD. PLAN - 216.30
FRPUBLIC WORKS APPR a :
DEPARTMENT CATCH BASIN INSERT GAZ 9/28/2018 1
�m DATE
ID 4-2-11 RAD SURVEYED:
DESIGNED:
R. DECCIO
DRAWN:
LR
CHECKED:
R. DECCIO
BY I DATE I APPR APPROVED: R. DECCIO
:45 A
:45
DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-A317AA638878
Z-:2" 14 GAUGE WIRE. OR
EQUIVALENT, IF STANDARD
STRENGTH FABRIC USED
FILTER FABRIC 2' MIN
I
-----------J�--.:
6 MAX. I I ! !
POSTSPRCINGMAY BE INCREASED � I awl MIN. TRENCH 12, MIN -
TO W IF WIRE BACKING IS USED ! 1-1
ILLLJJJI BACKFILL TRENCH WITH NATIVE SOIL
QR 3A4' TO 1-1rr WASHED GRAVEL
27H' WOOD POSTS, STEEL FENCE POSTS. OR EQUIVALENT LIYR.
NOTES:
L CONDTTIONSOFUSE
1 I. SILT FENCE MAY BE USED DOWN SLOPE OF ALL DISTURBED AREAS.
1.2. SILT FENCE IS NOT INTENDED TO TREAT CONCENTRATED FLOWS, NOR IS IT iNTENDEC TO TREAT SUBSTANTIAL AMOUNTS OF OVERLAND FLOW. ANY CONCENTRATED
FLOW MUST BE CONVEYED THROUGH THE ORUNAGE SYSTEM TO A SEDIMENT TRAP OR POND,
2. DESIITN AND INSTALLATION SPECIFICATIONS
2.1. THE GEOTEXTILE USED MUST MEET THE STANDARD LISTED BELLOW. A COPY OF THE MANUFACTURER'S FABRIC SPECIFICATIONS MUST BE AVAILABLE ON SITE.
AOS (ASTM D4751)
301-100 SIEVE SIZE C0.60.0.15rt 1 FOR SILT FILM
50,100 SIEVE SIZE (0.30-0.15-1 FOR OTHER FAD RICE
WATER PERMITTIVITY (ASTM D4491)
(102 SEC'' MINIMUM
GRAD TENSILE STRENGTH (ASTM 04632)
18100LBS MIN. FOR EXTRA STRENGTH FABRIC
0LBS. MIN. FOR STANDARD STRENGTH FABRIC
GRAB TENSILE ELONGATION (ASTM Q49n)
3D%MAIL (WOVEN)
ULTRAVIOLET RESISTANCE (ASTM 04355)
70%MIN.
22. STANDARD STRENGTH FABRIC REQUIRES WLRE BACKING TO INCREASE THE STRENGTH OF THE FENCE. WIRE BACKING OR CLOSER POST SPACING MAY RE REQUIRED
FOR EXTRA STRENGTH FABRIC IF FIELD PERFORMANCE WARRANTS ASTRONGER FENCE
2.3. WHERE THE FENCE IS INSTALLED, THE SLOPE SHALL NOT BE STEEPER THAN 21d,1V
2A. IF A TYPICAL SILT FENCE IS USED, THE STANDARD 4-X4- TRENCH MAY BE REDUCED AS LONG AS THE BOTTOM S INCHES OF THE SILT FENCE FABRIC IS WELL BURIED AND
SECURE IN A TRENCH THAT STABILIZES THE FENCE AND DOES NOT ALLOW WATER TO BYPASS OR UNDERMINE THE SILT FENCE.
2.5. FILTER FABRIC FENCES SHALL BE INSTALLED ALCN(3 CONTGURS WHENEVER PCSSIBLE.
I MAINTENANCE STANDARDS
3.1. ANY DAMAGE SHALL BE REPAIRED IMMEDIATELY.
3,2. IF OONCENTRATED FLOWS ARE EVIDENT UPHILL OF THE PENCE, THEY MUST BE INTERCEPTED AND CONVEYED TO A SEDIMENT TRAP OR POND,
3.3, IT IS IMPORTANT TO CHECK THE UPHILL SIDE OF THE FENCE FOR 5IONS OF THE FENCE CLOGGING AND ACTING AS A BARRIER TO FLOW AND THEN CAUSING
CHANNEL IZATION OF FLOWS PARALLEL TO THE FENCE. IF THIS OCCURS. REPLACE THE FENCE OR REMOVE THE TRAPPED SEDIMENT.
3A. SEDIMENT MUST BE REMOVED WHEN SEDIMENT IS 61NCHES HIGH.
3-5. IF THE FILTER FABRIC (GEOTEXTILE) HAS DETERIORATED DUE TO ULTRAVIOLET BREAXDOWN, IT SHALL BE REPLACED.
UNLESS OTHERWISE NOTE D. PRAW1W I3 NOT TO SCALE [NISI
STD. PLAN - 214.00
��I\ DEPARTMENT PUBLIC WORKS SILT FENCE GAZ 9/28/20188 I
DATE
57 518"
30119,
FRONT VIEW
vitalT,1 Cluster Box Unit - Type I
SIDE VIEW
:45 �l
1 r`
4"
28112"
PEDESTAL
1a
1 i'
PEDESTAL BASE
BOLT PATTERN
DOOR CHART
Pd011 TIT!I VWNWNWC;NTxwlpm]
NOTES: ID'PARCEL 10.114x1 &13116"
1 a' FAAIIccE1 13.3Tax12.1371 e
1. This unit is approved far LISPS and private applications. MWsFSEt OILMOINGSLOT�.kll_VC
2. Decorative mailbox accessories sold separately and are LISPS Approved vital CLUSTER BOX 11NCf
products.
3. Pedestal should be installed with included Rudder Pad; riT-r� T� MODB 157H "E A
mounting hardware not included. refer to installation manual for jj((�L�' j1��EEVreaommendativns. AF mdR pppD NINE 9151N201
��
4. Florence 'Fseries CBU is Officially Licensed by LISPS: 5935 Corporate Drive r MQnhotian, IN 66503 "`v NGNIA BER Dxww"e
License#CDSEO-08-B-0012 www,florencennoilboxes.com ■ (80D) 275-1747 1570-BC5 AFD
A CI INDUSTRIES COMPANY
RECORD DRAWINGS
12-3-20 _
R4 21
05 6
I
SCALE:
VERTICAL: NAVD 1988
•
HORIZONTAL: NAD 1983/1991
1 "=20'
DATUM
PRI
Nkslv
ONE INCH
AT FULL SCALE
Planning/
IF NOT ONE INCH
SCALE ACCORDINGLY
CITY OF
RENTON
uilding/Public Works Dept.
IN COMPLIANCE WITH CITY OF RENTON STANDARDS
AVON DEVELOPMENT 2 LOT
SHORT PLAT
DATE:
4-2-19
PAGE:
R-405206
SHEET: 6 OF: 9
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