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HomeMy WebLinkAboutR-411504;i R Z J L, i I T.L. 324320-0120 I SMALL (2'x2' RIP RAP PAD 16337 SE 131 ST PL I \' TO PROTECT OUTLET 30. I COORINDINATE WITH OWNER19 I TO MAINTAIN ACCESS TO EXISTING DRIVEWAY - I I I I GRAVEL OR COLD PATCH �.�A. RESTORE GROUND S61 . COVER IN KIND ONCE II TRENCH IS BACKFILLED I I I I T.L. 132305-9145 II I I ADDRESS: 13120 164TH AVE SE II II R-4 T.L. 324320-0150 I T.L. 324320-0130 I �6p I 11 �4DDRESS: 16320 SE 132ND ST ADDRESS:16332 SE 132ND ST I 0R-4 ADDRESS 6326 SE 132ND ST I I - I 1 ICONSTRUCTION ENTRANCE rQ U R-4 I PER COR STD 215.10 I 62� 1 '0- 0160 I SEE SHEET 5 1 / SE 132ND ST I I (CONTRACTOR TO MAINTAIN 0' ACCESS TO RESIDENCE ON N R - 4 I I T.L. 132305-9027 Lu . Q T.L. 132305-9027 UTILIZE STORMWATER VAULT FOR \ - R-4 ADDRESS: 13200 164TH AVE SE SEDIMENTATION OF CONSTRUCTION SITE I.' RUNOFF. VAC TRUCK CLEANING AS 464 R RtQUIRED AND ONCE CONSTRUCTION IS COORINDINATE WITH OWNER SD' - � _ - COMPLETE SITE IS STABILIZED. \. / SD TO MAINTAIN ACCESS TO S. • 132 STREET ❑ EXISTING DRIVEWAY TREE PROTECTION FENCE 3 DETAIL SEE SHEET 5 TIP L TREES TO BE - ---� T RETAINED (TYP) TY T T .. = .- - --- - --- - - - KIN / G 0 _ In SE 132ND S ° "� { _ 1 / - - /-460 - a I `'`C�f -- ---462-- TTO y/ x / x x/ x x X x Q O dQ ° °O d d I / / .I \ \ X I a a - I I /b I x ADDRESS 1163270SE 0132ND S I o ,� a. L I MULCH AND I I -4 \Q, ` I. , ; r � - I T ACT D � I \ ONCE FINAL SLOPE \ I I I 0� �s .. I STO - \-� xT x GRADES ARE 474 \ REACHED LOT 1 _ \ \� I X I I \ WASHOUT FACLITY l \ \ \ 10,657 SF I °Al- 1 MULCH/��- I - HYDROSEED 6 \ HIGH VISIBILITY SILT FENCE T.L. 132305 9093 l... I\ I I I PER COR STD 214.00 I I I ADDRESS: 13139 \ \ I \ I ¢ I \ SEE SHEET 5 (TIP) I 166TH AVE SE "� I \ LOT 8 I I ti I..I......... II o e \ � I / a° °. I o I \ INSTi4CCPQIRARY l \ I I I \ a / a� I I \ IN7ERCEPTO SWALE W TH CHECI DAMS (�) ............ II I / / - ---, CONSTRUCTOIN LIMITS / 1 I I \---- - --- _ jIL // / / (TYP) J I �-I x-X-x -x_X- - w. I I --I x x- x � I 4 oll / I I \ / �` / PRESERVEI EX. R- 4 I .....' .... I / I II I i / VEGETAON PER T.L. 145750-0023 I y I INSTALL;�TEMPORARY \ / //� �� BMP KING 0NTM 61 LF 12 CULVERT \ / KIG I® 2.06% MIN LOT 2 T MULCH/-- / / 10,630 SF I I /L6r5 / \ 9,45(1'�OSEED -464 l I 9,3w@IEEE AREA p I / I / uI� TREE T - - _ ToN / APPLY GRAVEL 7, 350 SF REN / ( COVER, WIPLAS77C I a. SURFACE ONCE I I / / I SHEETING AS NEEDED - - UTWTIES AREA / I . I\ INSTALLED I I __ ............................. �... I I \ \ 1 ............................. /. .......�'.. -. - R-4 \ i...........................�......................... 4a �..... \ ........ J.... .... i I / T.L. 132305-905 I CATCH BASIN INSERT LOT LIZE STORMWATER VAULT FOR \ I T.L. 132305-9045 PER COR STD 216.30 WDIMENTA77ON OF CONSTRUCTION SITE I I ADDRESS: 13231 SEE SHEET 5 TIP --9 4 R9FIOFI VAC TRUCK CLEANING ASI REQUIRED AND ONCE CONSTRUCTS N IS 166TH AVE SE COMPLETE/SITE IS STABILIZED. I� 4 0 R-4/ I � L0�3 1, 095 SF- � / I II OT 4 / d I I ,374 SF I I SILT FENCE PER COR STD 214.00 I \ / / / I °I ��� I I I / / EX TREE TO BE I I SEE SHEET 5 (TYP) / I / REMOVED (TIP) I v I �10 / TR C �h.. I STOR I' --- 6 0 --- x - - - - x X - - x _x - x \ I I / _ 8,868 SF T.L. 145750-0025 - x / i - 464 16210 SE 134TH ST 4 x N R \ CLEARING LIMITS (TIP) \ \ - x - x __ - x _ 462- - _ / /RENT \ \ INSTALL, TEMPO ARY \ 68\LF 112" CULVERT l FOR ONTINUATION I T.L. 132305-9058 � \\ 0 2.00% MIN � � ADDRESS: 13235 166TH AVE SE � KING OQU PHI LI pA �AEncompass jO� 6 REVISED PER ASBUILT SURVEY CID 04/17/2024 SURVEYED: SDM ENGINEERING & SURVEYING 5 REVISIONS PER FIELD CONDITIONS CID 0911512023 DESIGNED: 4 REVISIONS PER FIELD CONDITIONS CID0912812022 NEM Western Washington Division 165 NE Juniper Street, Suite 201 • IssaQuah, WA 98027 • Phone: (425) 392-0250 o tp„38375 �cy 3 REVISIONS PER CITY COMMENTS DATED 612312021 CID 07101120211 DRAWN: TLK Eastern Washington Division ss7 5 2 REVISIONS PER CITY COMMENTS DATED 410712021 CID0410812021 CHECKED: EDM 407 Swiftwater Blvd. ■ Cle Elum, WA 98922 ■ Phone: (509) 674-7433 ONAL 05/01/2024 N0. REVISION BY DATE APPR APPROVED: CJA SCALE: EROSION AND SEDIMENT CONTROL (ESC) STANDARD PLAN MOTES. THE FOLLOWING IS A LISTING OF GENERAL NOTES THAT SHALL BE INCORPORATED IN THE EROSION AND SEDIMENT CONTROL TESC} PLAN SET. ALL THE NOTES ON THE LIST MAY NOT PitzkTAIN TO EVERY PROJECT. YHE APPLICANT CA OWNER, IH 1AEAY REFERkr.[) TO AS APPLICANT, MAY STRIKrm OUT IRRELEVANT NOTES. IF NOT APPLICABLE TO THE PROJECT. HOWEVER, THE APPLICANT SHALL NOT RENUMBER NOR EDIT THE REMAINING NOTES. IF ADD ITIDNAL NOTES ARE NE1=DE11 FOR SPECIFIC ASPECTS, THEY SHALL BE ADDED AFTER THE F$C STANDARD PLAN NOTES 1 BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS. A PRE -CONSTRUCTION MEETING SHALL BE HELD AMONG THE CITY OF RENTON, HEREBY REFERRED TO AS THE CITY, THE APPLICANT, AND THE APPLICANT'S COMPACTOR. 2. THE APPLICANT IS RESPONSIBLE FOR OBTAINING THE WASH Ihi STATE DEPARTMENT OF ECOLOGY {ECOLOGY) CONSTRUCTION STORMWATER GENERAL PERMIT, IF IT IS REQUIRED FOR THE PROJECT. THE APPLICANT SHALL PROVIDE THE CITY COPIES OF ALL MONITORING REPORTS PROVIDED TO ECOLOGY ASSOCIATED WITH THE CONSTRU+v'T€ON STORMWATER GENERAL PERMIT. 3. THE ESC PLAN SET SHALL INCLUDE AN ESC CONSTRUCTION SEQUENCE DETAILING THE ORDERED STEPS THA7 SHALL BE FOLLOWED FROM GONISTRUCTICN COMMENCEMENT TO POST -PROJECT CLEANUP IN ORDER TO FULFILL PROJECT ESC REQUIREMENTS 4 THE BOUNDARIES CW THE CLEARING LIMITS, SENSITTV€ AREAS AND THEIR BUFFERS_ AND AREAS OF VEGETATION PRESERVATION AND TREE RETENTION AS PRESCRIBED ON THE PLANS} SHALL BE CLEARLY DELINEATED BY FENCING AND PROTECTED IN THE FIELD IN ACC01ii £ WITH APPENDIX D OF THE CITY OF RENTON SURFACE WATER DESIGN MANUAL (RENTON SWDM) PRIOR TO THE START OF CONSTRUCTION. DURING THE CONSTRUCTION PERIOD. NO DiSTURFLANCE BEYOND THE CLEARING LIMI"5 SHALL BE PERMITTED, THE. CLEAf34NG LIMITS SHALL BE MAINTAINED RY THI= APPLIOANTIESC SUPERVISOR FOR THE DURATION DF OON$TRU`CTION. 5 $TAMLIZED CONSTRUCTION ENTRANCES SHALT. BE INSTALLED AT THE 1�EGINNINQ OF CONSTRUCTION AND MAINTAINED FOR THE DURATION OF THE PROJECT. ADDITIONAL MEASURES, SUCH AS CON1 TRUCTED WHEEL WASH SYSTEMS OR WASH PADS, MAY BE REQUIRED TO ENSURE THAT ALL PAVED AREAS ARE KEPT CLEAN AND TRACK•OUT70 ROAD RrGHT OF WAY DOES NOT OCCUR FOR THE DURATION OF THE PROJECT. iF SEDIMENT IS TRACKED CFFS€TE, PUBLIC ROi SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY, OR MORE FREQUENTLY DURING WET WEATHER, AS NECESSARY TO PREVENT SEDIMENT FROM ENTERING WATr.RS OF THE STATE. S. WASHOUT FROM CONCRETE TRUCKS SHALL BE PERFORMED OFF -SITE OR IN DESIGNATEO CONCRETE WASHOUT AREAS ONLY. DO NOT WASH OUT CONCRETE TRUCKS ONTO THE GROUND, OR TO STORM DRAINS OR OPEN DITCHES. ON -SITE WMPING OF EXCESS CONCRETE SHALL ONLY OCCUR IN DESIGNATED COtlCRET1E WASH,CUT AREAS 7 ALL REQUIRED ESC BMPS SHALL BE CONSTRUCTED AND IN OPERATION PRIOR TO LAND CLEARING ANDiOR CONSTRUCTION TO PREVENT TRANSPORTATION OF SEDIMENT TO SURFACE WATER, DRAINAGE SYSTEMS AND ADJACENT PROPERTIES. ALL ESC EMPS SHALL BE MAINTAINED IN A SATISFAC70RY CONDITION UNTIL SUCH TIME THAT CLEARING ANON CONSTRUCTION IS COMPLETE AND POTENTIAL FOR ONSITE EROSION HAS PASSED. ALL ESC BMPS SH ALL BE REMOVED AFTER CONBTRUC TUN IS COMPLETED AND THE SITE HAS BEI=N STABILIYED TO ENSURE POTENTIAL FOR ON -SITE EROSION DOES NOT E7{I5T_ THE IMPLEMENTATioN, MAINTENANCE, REPLACEMENT, ENHANCEMENT, AND REMOVAL OF ESC BMPS SHALL BE THE RESPONSIBILITY QF THE APPLIUANT. 8 ANY HA7-ARDQUS MATERM$ OR LIQUID PRQE)i THAT HAVE THE POTENTIAL Tta Pk LUTE RUNOFF SHALL 9E P€SPQSED OF PROPERLY. 9. THE ESC BMPS DEPICTED DH 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 COURSE OF CONSTRICTION. IT SHALL BE THE CBLIGATION AND RESPONSIBILITY CP THE APPLICANT TO ADDRESS ANY NEW CONDITIONS THAT MAYBE CREATED BY 7HE ACTIVITIES AND TO PROVIDE ADDITIONAL ESC BMPS, OVER AND ABOVE MINIMUM REOU1REMENTS, AS MAY BE NEEDED. TO PROTECT ADJACENT PROPERTIES AND WATER QUALITY 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, RESTRICTORS, CHANNELS, OR STORMWATER FACILITIES. 11. ANY DEWATERING SYSTEM NECESSARY FOR THE CONSTRUCTIM OF STORMWATER FACILMES 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 OURING THE WET SEASON (OCTOBER 1ST THROUGH APRIL 31 OR SEVEN: DAYS DURING THE DRY SEASON (MAY TST T14ROUGH SEPTEMBER 30TI•I) SHAi1 BE IMMEDIATELY STABILIZED WITH THE APPROVED ESC COVER METHODS (EG., SEEDING, MULCtilmG, PLASTIC COV@RING, ETC.) IN CONFOWANCE WITH APPENDLx D OF THE RENTON SWDM. 13. WET SEASON ESC REOUIREMENTS APPLY TO ALL CONSTRUCTION SITES BETWEEN OCT08ER 1ST AND APRIL 313TIi, UNLESS OTHERWISE APPROVED BY THE CITY_ 14. ANY AREA NEEDINQ ADDITIONAL, E$G MFASURE5, NOT REQUIRING IMMI DIATE ATTENTION, SHALL 5E ,ADDRESSED WITHIli (7} DAYS_ M I T H I P T I INS IN M V IlS. THE E$C a PS ON INACTIVE 51 ES $ ALL BE NS EC EP AN4 MA NTAI?•IEt3 AT A MINIMUM 4F ONCE A M{7N7T-d OR WFTHiN 2q HOURS FOLLOWING A STAR E ENT INSPECTION AND MAINTENANCE 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 500 FEET OF ADISTURMD OR CONSTRUCTION AREA, UNLESS THE RUNOFF THAT ENTERS THE INLET WILL BE CONVEYED TO A SEDIMENT POND OR TRAP. ALL CATCH BASIN INSMTS SHALL BE PERIODICALLY INSPECTED AND REPLACED AS NECESSARY TO ENSURE FULLY FUNCTIONING CONDITION 17. AT NO TIME SHALL SEDIMENT ACCUMULATION EXCEED n OF THE CAPACITY OF THE CATCH BASIN SUMP. ALL CATCH BASINS AND CONVEYANCE LINES SHALL BE CLEANED PRIOR TO PAVING. THE CLEANING OPERATION SHALL NDT FLUSH SEDIMENT -LADEN 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 SI €ALL PROVIDE ADEQUATE STORAGE CAPACITY. IF THE TEMPORARY FACILITY IS 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 A90VE THE FINAL GRADE OF THIS PERMANENT FACILITY. 19, AREAS DESIGNATED QN THE PLAN($) CONTPJNINQ Exl$TING STORMWATER FAGILIFIES OR ONSFTE BMPS (AMENDED SOIL $, HIORETENTI-DIN', PERMEABLE PAVEMFNT, ETC ) SHALL BE CLEARLY FENCED AND PizRTECTED USING ESC BMPS TO AwAID SEDrMENTATION AND COMPACTION PUR€NG CONSTRUCT€1Z)11. 20. PRIOR TO THE BE -SINNING OF THE WET SEASON IOCTOBER IST), 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 Ci WEEK OF THE BEGINNING OF THE WET SEASON AN EXHIBIT OF THOSE AREAS TO BE SODDED OR SEEDED AND THOSE AREAS TO REMAIN UNCOVERED SHALL BE SUBMITTED TO THE CITY FOR REVIEW. 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 SRALL BE REMOVED, AND STORMWATER CONVEYANCE SYS?EMS, FACILITIES, AND ON -SITE BMPS SHALL BE RESTORES} TO THIEIR FULLY FUNCTIONING CONOrrION1. ALL DISTUR13€V AREAS OF THE PROJECT SITE SHAD EE VE(;ETA7E0 OR OTHERWISE PERMAINENTLY STABILIZED. AT A MINIMUM, DISTURBED AREAS SHALL BE SODDED OR SEEDED AND MULCHED TO ENSURE THAT SUFFICIENT COVER WILL DEVELOP SHORTLY AFTER FINAL APPROVAL. MULCH WITHOUT SEEDING IS ADEQUATE FOR AREAS TO BE LANDSCAPED BEFORE OCTOBER TST 22. ROCKERIES ARE CONSICEREID TO BE A METHOD OF BANK STARIU ATION AND EROSION CONTROL ROCKERIES SHALL NOT BE CONSTRUCTED TO SERVE AS RETAINING WALLS_ ALL ROCKERIES IN CITY ROAD RICaiTS OF•WAY SHALL BE CONSTRUCTED IN ACCORDANCE WITH CITY STANDAkDs. ROCKERIES OUTSIDE OF ROAD AIGH TS-OP-WAY SHALL RE CONSTRUCTED IN ACCORDANCE WrtH THE INTERNATIONAL BUILDING CODE_ 1 "=30' PUBLIC WORKS DEPARTMENT EROSION AND SEDIMENT CONTROL STANDARD PLAN NOTES CONSTRUCTION SEQUENCE: 1. PRE -CONSTRUCTION MEETING. 2. POST NOTICE OF CONSTRUCTION ACTIVITY SIGN WITH NAME AND PHONE NUMBER OF ESC SUPERVISOR. 3. FLAG OR FENCE CLEARING LIMITS. 4. INSTALL CATCH BASIN PROTECTION IF REQUIRED. 5. GRADE AND INSTALL CONSTRUCTION ENTRANCE(S). 6. INSTALL PERIMETER PROTECTION (SILT FENCE, BRUSH BARRIER, ETC.). 7. CONSTRUCT SURFACE WATER CONTROLS (INTERCEPTOR DIKES, PIPE SLOPE DRAINS, ETC.) SIMULTANEOUSLY WITH CLEARING AND GRADING FOR PROJECT DEVELOPMENT. 8. EXCAVATE FOR STORMWATER DETENTION VAULTS. VAULT EXCAVATIONS SHALL BE USED FOR TESC STORM DETENTION. VAULT CONSTRUCTION SHALL BE STAGGERED AND PUMPS KEPT ON SITE SO THAT STORMWATER CAN BE TRANSFERRED BETWEEN EXCAVATIONS AS NEEDED. 9. CONSTRUCT STORMWATER OUTFALLS TO ALLOW FOR DISCHARGE FROM STORM VAULT EXCAVATIONS OF TESC STORM EVENTS. NORTH VAULT OUTFALL SHOULD BE CONSTRUCTED FIRST DUE TO LENGTH OF OUTFALL AND PROXIMITY TO SITE. 10. MAINTAIN EROSION CONTROL MEASURES IN ACCORDANCE WITH CITY OF RENTON EROSION AND SEDIMENT CONTROL STANDARDS. 11. RELOCATE SURFACE WATER CONTROLS AND EROSION CONTROL MEASURES OR INSTALL NEW MEASURES SO THAT AS SITE CONDITIONS CHANGE SO THAT THE EROSION AND SEDIMENT CONTROL IS ALWAYS IN ACCORDANCE WITH THE CITY OF RENTON EROSION AND SEDIMENT CONTROL STANDARDS. 12. COVER ALL AREAS THAT WILL BE UNWORKED FOR MORE THAN SEVEN DAYS DURING THE DRY SEASON OR TWO DAY DURING WET SEASON WITH STRAW, WOOD FIBER MULCH, COMPOST, PLASTIC SHEETING, OR EQUIVALENT. 13. STABILIZE ALL AREAS THAT REACH FINAL GRADE WITHIN 7 DAYS. 14. SEED OR SOD ANY AREAS TO REMAIN UNWORKED FOR MORE THAN 30 DAYS. UPON COMPLETION OF THE PROJECT, ALL DISTURBED AREAS MUST BE STABILIZED AND BEST MANAGEMENT PRACTICES REMOVED IF APPROPRIATE. 15. UPON COMPLETION OF THE PROJECT. ALL DISTURBED AREAS MUST BE STABILIZED AND BMPS REMOVED, IF APPROPRIATE. ONE INCH AT FULL SCALE IF NOT ONE INCH SCALE ACCORDINGLY VERTICAL: NAVE) 1988 HORIZONTAL: NAD 1983/1991 DATU M UNLESS QTHEIii N07M DRAWING 1S N6T'!0 SCALE (NTS) STD. PLAN - 268.00 PPH D- GAZ 9/28/2018 { :45 Ar GEOTECHNICAL RECOMMENDATIONS: Know what's below. Call before you dig. CITY OF RENTON Planning/Building/Public Works Dept. 0 5 10 20 30 SCALE 1 " = 30' TESC LEGEND: ® FILTER FABRIC PROTECTION 0 0 TREE PROTECTION LIMITS OF CONSTRUCTION x x x SILT FENCE APPROXIMATE CUT/FILL VOLUMES CUT.• Z093 C.Y. FILL: 6,211 C.Y. DISTURBANCE AREA AS SHOWN ON THIS SHEET 3.07 AC. ARBORI ST IS TO BE PRESENT ON SITE DURING CONSTRUCTION OF THE SHARED DRIVEWAY, ASSOCIATED UTILITIES & THE PUBLIC STREET FRONTAGE. SUBGRADE PREPARATION FOLLOWING SITE STRIPPING AND REMOVAL OF THE EXISTING STRUCTURAL IMPROVEMENTS, CUTS AND FILLS WILL BE COMPLETED TO ESTABLISH THE PROPOSED SUBGRADE LEVELS THROUGHOUT THE SITE. ESNW SHOULD OBSERVE THE SUBGRADE DURING THE INITIAL SITE PREPARATION ACTIVITIES TO CONFIRM SOIL CONDITIONS AND TO PROVIDE SUPPLEMENTAL RECOMMENDATIONS FOR SUBGRADE PREPARATION. I� iymrru�►���nn�ys•»�� TEMPORARY SLOPES OVER FOUR FEET IN HEIGHT IN TYPE C SOILS SHOULD BE SLOPED NO STEEPER THAN 1.5H:1V (HORIZONTAL: VERTICAL). DENSE NATIVE SOIL AND WHERE GROUNDWATER IS NOT EXPOSED WOULD BE CLASSIFIED BY OSHA/WISHA AS TYPE A. TEMPORARY SLOPES OVER FOUR FEET IN HEIGHT IN TYPE A SOILS SHOULD BE SLOPED NO STEEPER THAN 0.75H: IV (HORIZONTAL: VERTICAL) ESNW SHOULD OBSERVE THE EXCAVATIONS TO CONFIRM TEMPORARY SLOPE INCLINATIONS ARE AA RECOMMENDED FOR THE EXPOSED SOIL TYPE. IF TEMPORARY SLOPES CANNOT BE CONSTRUCTED IN ACCORDANCE WITH OSHA/WISHA GUIDELINES, TEMPORARY SHORING MAY BE NECESSARY. PERMANENT SLOPES SHOULD MAINTAIN A GRADIENT OF 2H:1V, OR FLATTER, AND SHOULD BE PLANTED WITH AN APPROPRIATE SPECIES OF VEGETATION TO ENHANCE STABILITY AND MINIMIZE EROSION. THIS CONDITION APPLIES TO CONSTRUCTION OF THE DETENTION VAULT, WHICH IS LOCATED NEAR A PROPERTY LINE. DRAINAGE MINOR GROUNDWATER SEEPAGE SHOULD BE EXPECTED IN SITE EXCAVATIONS, ESPECIALLY AT THE CONTACT BETWEEN THE WEATHERED AND UNWEATHERED TILL SOILS. TEMPORARY MEASURES TO CONTROL SURFACE WATER RUNOFF AND GROUNDWATER DURING CONSTRUCTION WOULD LIKELY INVOLVE PASSIVE ELEMENTS SUCH AS INTERCEPTOR TRENCHES AND SUMPS. I�Pl���1�►��.9x��1�1►�1G� THE PERFORMANCE OF SITE PAVEMENTS IS LARGELY RELATED TO THE CONDITION OF THE UNDERLYING SUBGRADE. TO PROVIDE ADEQUATE PAVEMENT PERFORMANCE, THE SUBGRADE SHOULD BE IN A FIRM AND UNYIELDING CONDITION WHEN SUBJECTED TO PROOFROLLING WITH A LOADED DUMP TRUCK. IT IS POSSIBLE THAT SOFT, WET, OR OTHERWISE UNSUITABLE SUBGRADE AREAS MAY STILL EXIST AFTER BASE GRADING ACTIVITIES. AREAS OF UNSUITABLE OR YIELDING SUBGRADE CONDITIONS WILL REQUIRE REMEDIAL MEASURES SUCH AS OVEREXCAVATION, CEMENT TREATMENTS, PLACEMENT OF A GEOTEXTILE AND THICKER CRUSHED ROCK OR STRUCTURAL FILL SECTIONS PRIOR TO PAVEMENT. UTILITY SUPPORT AND TRENCH BACKFILL EXCESSIVELY LOOSE, ORGANIC, OR OTHERWISE UNSUITABLE SOILS ENCOUNTERED IN THE TRENCH EXCAVATIONS SHOULD NOT BE USED FOR SUPPORTING UTILITIES. IN GENERAL, THE ON -SITE SOILS OBSERVED AT THE TEST SITES SHOULD BE SUITABLE FOR USE AS STRUCTURAL BACKFILL IN THE UTILITY TRENCH EXCAVATION, PROVIDED THE SOIL IS AT OR NEAR THE OPTIMUM MOISTURE CONTENT AT THE TIME OF PLACEMENT AND COMPACTION. MOISTURE CONDITIONING OF THE SOIL MAY BE NECESSARY AT SOME LOCATIONS PRIOR TO USE AS STRUCTURAL FILL. UTILITY TRENCH BACKFILL SHOULD BE PLACED AND COMPACTED TO THE SPECIFICATION OF STRUCTURAL FILL PROVIDED IN THIS REPORT, OR TO THE APPLICABLE SPECIFICATION OF THE CITY OF RENTON. R _ 411 5 0 4 L 7 ON • 91 IN COMPLIANCE WITH CITY OF RENTON STANDARDS ~ SKYHORSE SHORT PLAT PR 17- 000438 ASBUILT TESC PLAN Q O Z L� C/� DATE: 0611712024 FIELDBOOK: PAGE: O DRAWING NO: 22587 SHEET: OF: 4 20