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D.8.2 STANDARD ESC PLAN NOTES
The standard ESC plan notes must be included on all ESC plans. At the applicant's discretion, notes that
in no way apply to the project may be omitted; however, the remaining notes must not be renumbered.
For example, if ESC Note #3 were omitted, the remaining notes should be numbered 1, 2, 4, 5, 6, etc.
1. Approval of this erosion and sedimentation control (ESC) plan does not constitute an approval of
permanent road or drainage design (e.g., size and location of roads, pipes, restrictors, channels,
retention facilities, utilities, etc.).
2. The implementation of these ESC plans and the construction, maintenance, replacement, and
upgrading of these ESC facilities is the responsibility of the applicantESC supervisor until all
construction is approved.
3. The boundaries of the clearing limits shown on this plan shall be clearly flagged by survey tape or
fencing, if required, prior to construction (SWDM Appendix D). During the construction period, no
disturbance beyond the clearing limits shall be permitted. The clearing limits shall be maintained by
the applicanUESC supervisor for the duration of construction.
4. 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 required It ensure that all paved areas are kept clean and track out to road right of way
does not occur for the duration of the project.
5. The ESC facilities shown on this plan must be constructed prior to or in conjunction with all clearing
and grading so as to ensure that the transport of sediment to surface waters, drainage systems, and
adjacent properties is minimized.
6. The ESC facilities shown on this plan are the minimum requirements for anticipated site conditions.
During the construction period, these ESC facilities shall be upgraded as needed for unexpected storm
events and modified to account for changing site conditions (e.g. additional cover measures,
additional sump pumps, relocation of ditches and silt fences, perimeter protection etc.) as directed by -
King County.
7. The ESC facilities shall be inspected daily by the applicant/ESC supervisor and maintained to ensure
continued proper functioning. Written records shall be kept of weekly reviews of the ESC facilities.
8. Any areas of exposed soils, including roadway embankments, that will not be disturbed for two "
consecutive days during the wet season or seven days during the dry season shall be immediately
stabilized with the approved ESC methods (e.g., seeding, mulching, plastic covering, etc.).
9. Any area needing ESC measures that do not require immediate attention shall be addressed within
seven (7) days.
10. The ESC facilities on inactive sites shall be inspected and maintained a minimum of once a month
during the dry season, bi- monthly during the wet season, or within twenty four (24) hours following a
storm event.
11. At no time shall more than one (1) foot of sediment be allowed to accumulate within a catch basin.
All catch basins and conveyance lines shall be cleaned prior to paving. The cleaning operation shall
not flush sediment -laden water into the downstream system.
12. Any permanent retention /detention facility used as a temporary settling basin shall be modified with
the necessary erosion control measures and shall provide adequate storage capacity. If the facility Is
to function ultimately as an infiltration system, the temporary facility must be rough graded so that the
bottom and sides are at least three feet above the final grade of the permanent facility.
13. Cover measures will be applied in conformance with Appendix D of the Surface Water Design
Manual
D.8.2 STANDARD ESC PLAN NOTES
2009 Surface Water Design Manual - Appendix D 1/9/2009
D -99
14. Prior to the beginning of the wet season (Oct. 1), all disturbed areas shall be reviewed to identify
which ones can be seeded in preparation for the winter rains. Disturbed areas shall be seeded within
one week of the beginning of the coat season. A sketch map of those areas to be seeded and those
areas to remain uncovered shall be submitted to the DDES inspector.
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NOTES
1. CONBITKINOFUSE
6t SILT FENCE MAY BE USED DOWNSLOPE OF ALL DISTURBED AREAS.
1' SILT FENCE IS NOT INTENDED TO TREAT GIXICENFRATED FLOWS NOR IS INTENDED TO LREAT SUBSTANTIAL AMWMB OF c ERUNO FTOK
?NY C0.NCENTMTEO FLOW MOST 6E CgYVEYEC THRDUGX THE DRAINAGE SYSTEFN 10 r\ SEJIMEMTRAPOR PIX1O.
2. DESIGN AND INSTALLATION SPECIFICATIONS
2.1 THE GEOTCM4E USED MOCT MEI HESTANDAND I 1 OY LLCrW ACOPY OFTHE MANUP.CTUPLATS GABRIC SPECIF.CC11I NOG76E
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PUBLIC RUN .9 CATCH BASIN FILTER
DEPARTMENT
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MARCH 2008
0202
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NOTES
1. CONBITKINOFUSE
6t SILT FENCE MAY BE USED DOWNSLOPE OF ALL DISTURBED AREAS.
1' SILT FENCE IS NOT INTENDED TO TREAT GIXICENFRATED FLOWS NOR IS INTENDED TO LREAT SUBSTANTIAL AMWMB OF c ERUNO FTOK
?NY C0.NCENTMTEO FLOW MOST 6E CgYVEYEC THRDUGX THE DRAINAGE SYSTEFN 10 r\ SEJIMEMTRAPOR PIX1O.
2. DESIGN AND INSTALLATION SPECIFICATIONS
2.1 THE GEOTCM4E USED MOCT MEI HESTANDAND I 1 OY LLCrW ACOPY OFTHE MANUP.CTUPLATS GABRIC SPECIF.CC11I NOG76E
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2.2 STANDARD 57RENGTH FPBRIC REOJIRES WIRE BACNWG TO INCREASE THE STRENGTH OFTHE FENCE VANE BACKING OR UOSER POST
9ACING MAY BE REWIRED FOR E.iRA STRENGTH FABRIC IF FIELD PERFORMANCE WARRANTS A STRONGER FENCE.
2J WHERE THE FENCE IS INSTALLED THE SLOPE SLWLL NOT BE STEEPER THAN 2HN
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2.4 .F ATYPICALSILT PENCE Is USED TiE 6TANCARO �X<TPENCH MA'! NOT 8E REDUCED AS LONG AS THE BOTTOM B INCV£5 CF TIE 50.1 F@1!
S WELL BURIED ANDSECURE IN A TRENCH THAT STAMUDIES THE 'ELI AND DOES NOT ALLOW WATER TO BYPASS OR UNDERMINE THE SILT
FENCE :.
J.. MAINTENANCE STANDARDS
".1 NIYOAAAGE SHPIL BE REPAIR IMMEDIATELY '
3.2 IF CONCRNTRATEED FLOES ARE "DEW UPHILL 00 THE FENCE THEY MUST BE INTERCEPTED AND COfbEYEO TO A SEOPEtR TRAP OR PON
13 IT IS IMPORTNiT TO CHECK THE UPHILL SIDE OF THE FENCE FOR SIGNS OF THE FENCE CLOGGING AND ACTING As A EAWEEF TO FLQV NA
THEN CADS ING CQVN{NELUA710N OE FLOWS PARALLEL TO THE FENCE IF THIS OCCURS REPLACE THE FENCE OR RENOIFD THE TRAP
SEDIMENT.
3.4 MUIME14T MOST BE REMOVED WHEN SEDIMENT 150INCHES HIGH
3.5 IF THE FILTER FABRIC TGEOTEMIUB HAS DETERIORATED DUE TO ULTRAVIOU'_69EMbOWN, R $HALL 6E aEFYAC£O.
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