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HomeMy WebLinkAboutC_DeclerationofCovenant_Jung_220328_V450' - 0"102' - 0"50' - 0"102' - 0"PATIO GARAGE FF. ELEV. 143.0' 16' - 0"1' - 6"www.autodesk.com/revit Scale Date Drawn By Checked By Project Number SGCI 1" = 10'-0"11/17/2022 12:20:55 AMD1 Checker Author Issue Date Project Number No. Description Date 1 Revision 1 Date 1 1" = 10'-0"1 Site TOTAL LOT / SITE AREA ADDRESS: NEW / REPLACED IMPERVIOUS AREA (SF): ON-SITE BMP(S) USED: MAX. IMPERVIOUS SURFACE ALLOWED (SF): PARCEL NUMBER: DISTURBED AREA (SF): JUNG RESIDENCE 1008 N 28TH PL RENTON WA 98056 5,025 SF 2,938 SF DRYWELL 3,266 SF (65%) 3342100940 5,025 SF DS DS DS DS SCH 80 PIPE FOR DRIVEWAY TYPE 1 CB RIM ELEV: 147IE 1: 143.5 IE 2: 143 DRYWELL DIA : 7' TOP : 142IE : 141 BOT : 136 ROW Dedication to the City PIPE: 6" SDR35 SDR 80 PIPE TO BE RUN TO THE DRYWELL DUE TO LOCATION OF DRYWELL UNDERNEATH THE DRIVEWAY CITY OF RENTON SURFACE WATER DESIGN MANUAL 2017 City of Renton Surface Water Design Manual 12/12/2016 CITY OF RENTON SURFACE WATER DESIGN MANUAL REFERENCE 8-M ON-SITE BMP COVENANT AND MAINTENANCE INSTRUCTIONS (RECORDABLE FORMAT) REFERENCE 8: PLAN REVIEW FORMS AND WORKSHEETS 12/12/2016 2017 City of Renton Surface Water Design Manual (This page intentionally left blank.) MAINTENANCE INSTRUCTIONS FOR FULL DISPERSION Your property contains an on-site BMP (best management practice) called “full dispersion.” Full dispersion is a strategy for minimizing the area disturbed by development (i.e., impervious or nonnative pervious surfaces, such as concrete areas, roofs, and lawns) relative to native vegetated areas (e.g., forested surface) together with the application of dispersion techniques that utilize the natural capacity of the native vegetated areas to mitigate the stormwater runoff quantity and quality impacts of the developed surfaces. This on-site BMP has two primary components that must be maintained per Appendix A of the City of Renton’s Surface Water Design Manual: (1) the devices that disperse runoff from the developed surfaces, and (2) the native vegetated area and flowpath receiving the dispersed runoff. Dispersion Devices The dispersion devices used on your property include the following as indicated on the site plan (CHECK THE BOX(ES) THAT APPLY): splash blocks, rock pads, gravel filled trenches, sheet flow. MAINTENANCE RESTRICTIONS The size, placement, composition, and downstream flowpaths of these devices as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES Dispersion Devices • Dispersion devices must be inspected annually and after major storm events to identify and repair any physical defects. • When native soil is exposed or erosion channels are present, the sources of the erosion or concentrated flow need to be identified and mitigated. • Bare spots should be re-vegetated with native vegetation. • Concentrated flow can be mitigated by leveling the edge of the pervious area and/or regrading or replenishing the rock in the dispersion device, such as in rock pads and gravel-filled trenches. Native Growth Retention Area • The native vegetated surface required for full dispersion is delineated as a “native growth retention area” on the on-site BMP site plan. The trees, vegetation, ground cover, and soil conditions in this area may not be disturbed, except as allowed by the following provisions for that portion of the native growth retention area outside of critical areas and critical area buffers: 1. Individual trees that have a structural defect due to disease or other defects, and which threaten to damage a structure, road, parking area, utility, or place of employment or public assembly, or block emergency access, may be topped, pruned, or removed as needed to eliminate the threat. 2. Dead or fallen trees, tree limbs within ten feet of the ground, and branches overhanging a residence may be removed to reduce the danger of wildfire. 3. Noxious weeds (i.e., plant species listed on the State noxious weed list in Chapter 16-750 WAC) and invasive vegetation (i.e., plant species listed as obnoxious weeds on the noxious weed list adopted by King County) may be removed. 4. Passive recreation uses and related facilities, including pedestrian, equestrian community and bicycle trails, nature viewing areas, fishing and camping areas, and other similar uses that do not require permanent structures, are allowed if clearing and soil compaction associated with these uses and facilities does not exceed eight percent of the native growth retention area. RECORDING REQUIREMENT These full dispersion on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. TYPICAL FULL DISPERSION APPLICATIONS SIDE VIEW NTS HOUSE DOWNSPOUT EXTENSION SPLASHBLOCK ROOF DOWNSPOUT SPLASH BLOCK 100' MIN. VEGETATED FLOWPATH UNDER FULL DISPERSION, SEE SECTION C.2.1.3 TYPICAL FULL DISPERSION APPLICATIONS TYPICAL FULL DISPERSION APPLICATIONS WIDTH = 25 FT FOR A 100-FT NVFS WIDTH = 50 FT FORA 200-FT NVFS PLAN VIEW NTS CRUSHED ROCK STRIP 2-FT WIDE = 5% SLOPE NATIVE VEGETATED FLOWPATH SEGMENT (NVFS) =15% SLOPE 100 FT MINIMUM EDGE OF UNDISTURBED NATIVE VEGETATION MAINTENANCE INSTRUCTIONS FOR FULL INFILTRATION Your property contains an on-site BMP (best management practice) called “full infiltration,” which was installed to mitigate the stormwater quantity and quality impacts of some or all of the impervious surfaces on your property. Full infiltration is a method of soaking runoff from impervious area (such as paved areas and roofs) into the ground. If properly installed and maintained per Appendix A of the City of Renton’s Surface Water Design Manual, full infiltration can manage runoff so that a majority of precipitation events are absorbed. Infiltration devices, such as gravel filled trenches, drywells, and ground surface depressions, facilitate this process by putting runoff in direct contact with the soil and holding the runoff long enough to soak most of it into the ground. To be successful, the soil condition around the infiltration device must be reliably able to soak water into the ground for a reasonable number of years. Infiltration Devices The infiltration devices used on your property include the following as indicated on the site plan (CHECK THE BOX(ES) THAT APPLY): gravel filled trenches, drywells, ground surface depressions. MAINTENANCE RESTRICTIONS The size, placement, and composition of these devices as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES • Infiltration devices must be inspected annually and after major storm events to identify and repair any physical defects. • Maintenance and operation of the system should focus on ensuring the system’s viability by preventing sediment-laden flows from entering the device. Excessive sedimentation will result in a plugged or non-functioning facility. • If the infiltration device has a catch basin, sediment accumulation must be removed on a yearly basis or more frequently if necessary. • Prolonged ponding around or atop a device may indicate a plugged facility. If the device becomes plugged, it must be replaced. • Keeping the areas that drain to infiltration devices well swept and clean will enhance the longevity of these devices. • For roofs, frequent cleaning of gutters will reduce sediment loads to these devices. RECORDING REQUIREMENT These full infiltration on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. TYPICAL FULL INFILTRATION APPLICATIONS 6" 24" 12" 24" WASHED ROCK 1 12"- 34" LEVEL INFILTRATION TRENCH SECTION ANTS PLAN VIEWNTS SECTION VIEW NTS VARIES A A 6" 6" 4" RIGID OR 6"FLEXIBLEPERFORATEDPIPE CB SUMP w/SOLID LID ROOF DRAIN 4" RIGID OR 6" FLEXIBLEPERFORATED PIPE OVERFLOW SPLASH BLOCK ROOF DRAIN CB SUMP w/SOLID LID 12" FINE MESHSCREEN SETBACKFROMBUILDING5' MIN. 1' MIN.1' MIN. FILTER FABRIC COMPACTED BACKFILL 4" RIGID OR 6" FLEXIBLE PERFORATED PIPE 112" - 34" WASHED ROCK MIN. 1' ABOVE SEASONALHIGH GROUNDWATERTABLE, SEE SECTION C.2.2.2 TRENCH SETBACK FROMBUILDING AS REQUIRED,15' MIN. DRIVEWAY X-SECTION NTS 2' MIN. FILTER STRIPSEE SECTIONS6.3.4 & 6.3.5 18" MIN. 6" MIN. 3/4" TO 1-1/2"WASHED DRAINROCK GRASS OVERFLOW NOTE:SEE C.2.2.3 FOR TRENCH LENGTHS,TRENCH SPACING ANDSITE LIMITATIONS MIN. 1' ABOVESEASONAL HIGHGROUNDWATERTABLE, SEESECTION C.2.2.2 X-SECTION NTS GRASS 2' MIN. 18" MIN. 6" MIN. 3/4" TO 1-1/2"WASHED DRAINROCK OVERFLOW 15' MIN. ASREQUIRED,SEE C.2.2.3 FROM ROOF NS T T S MIN. 1' ABOVESEASONAL HIGHGROUNDWATERTABLE, SEESECTION C.2.2.2 HOUSE FLOW 48 INCH DIAMETERHOLE FILLED WITH 1 12" - 3" WASHEDDRAIN ROCK SECTIONNTS MARK CENTER OF HOLEWITH 1" CAPPED PVCOR OTHER MEANSFLUSH WITH SURFACE ROOF DOWNSPOUT OVERFLOW SPLASH BLOCK TOPSOIL FINE MESH SCREEN MIN. 4" DIA.PVC PIPE SIDES OF HOLELINED WITHFILTER FABRIC CATCH BASIN(YARD DRAIN) 15' MIN. AS REQUIRED, SEE SECTION C.2.2.3 VARIES 1' MIN. MIN. 1' ABOVE SEASONALHIGH GROUNDWATER TABLE,SEE SECTION C.2.2.2 5' MIN. SETBACKFROM BUILDING FLOW PLAN VIEWNTS HOUSE ROOFDOWNSPOUT ROOFDOWNSPOUT CATCH BASIN(YARD DRAIN) 48 INCH DIAMETERHOLE FILLED WITH1 12" - 3" WASHEDDRAIN ROCK MAINTENANCE INSTRUCTIONS FOR A RAIN GARDEN Your property contains an on-site BMP (best management practice) called a “rain garden,” which was installed to mitigate the stormwater quantity and quality impacts of some or all of the impervious or nonnative pervious surfaces on your property. Rain gardens include vegetated closed depressions (ponds) that retain and filter stormwater from an area of impervious surface or nonnative pervious surface on your property. The soil in the rain garden has been enhanced to encourage and support vigorous plant growth that serves to filter the water and sustain infiltration capacity. Depending on soil conditions, the rain garden area may have water in it throughout the wet season and may overflow during major storm events. This on-site BMP shall be maintained per Appendix A of the City of Renton’s Surface Water Design Manual. MAINTENANCE RESTRICTIONS The size, placement, and design of the rain garden as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from City of Renton. Plant materials may be changed to suit tastes, but chemical fertilizers and pesticides must not be used. INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES • Rain gardens must be inspected annually for physical defects and sediment accumulation. • Rain gardens have inflow and overflow inlets and outlets. These need to be maintained to ensure that water is moving into and out of the rain garden. Check inlets/outlets for debris/sediment blockage, bare spots (exposed soil), or other signs of erosion damage (soil movement). Remove debris and obstructions as necessary. • After major storm events, the system should be checked to see that the overflow system is working properly and sedimentation is not occurring at the inlet. If erosion damage or bare spots are evident, they should be stabilized with soil, plant material, mulch, or landscape rock. Sediment deposits should be carefully removed and the sediment source eliminated. • Plants must be adapted to wet winter conditions and dry summer conditions. Vegetation is to be watered and pruned as needed. • Frequent watering is required to keep the plants healthy: o Year 1: weekly, o Year 2: bimonthly, o Year 3: bimonthly, o Year 4 & beyond: as needed for established plantings and dry periods. • Chemical fertilizers and pesticides must not be used. • Soil must be replaced in areas where sediment accumulation is preventing adequate infiltration of water through the soil. • Compacted soil should be decompacted. • Trash and debris must be removed often from the rain garden depression. • Mulch must be applied to bare soil at a minimum of 2 inches to maintain healthy growth. • Compost may be added if soil nutrients are no longer adequate to support plant growth. • Vegetation should be maintained as follows: 1) Replace all dead vegetation as soon as possible; 2) Remove fallen leaves and debris as needed; 3) Remove all noxious vegetation when discovered; 4) Manually weed without herbicides or pesticides; 5) To protect infiltration performance, do not compact soils in the bioretention cell with heavy maintenance equipment and/or excessive foot traffic; 6) During drought conditions, use mulch to prevent excess solar damage and water loss. RECORDING REQUIREMENT These rain garden on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. TYPICAL RAIN GARDEN (SPILLWAY OR CATCH BASIN OUTLET) TREES, SHRUBS GROUND COVER BIORETENTION AREA PLAN VIEW NTS VEGETATEDCOMPACTEDEARTH BERM ROCKED SPILLWAY, 2'Wx4'L (OR BEYOND BERM IF LONGER), OVERFLOW TOSUITABLE DISCHARGE AREA TREES, SHRUBS GROUND COVER BIORETENTION AREA PLAN VIEW NTS VEGETATED COMPACTED EARTH BERM, TOP WIDTH 2' MIN 4" RIGID PIPE OUTLET TO STORM SYSTEM CATCH BASIN w/GRATE SECTION A-A NTS BIORETENTION AREA GROUNDCOVER TREES TREES SHRUBS 6" MIN TO 12" MAX WATER DEPTH OVERFLOW TO SUITABLE SURFACEDISCHARGE AREA 2' MIN TOP WIDTH COMPACTED EARTHBERM (AS NEEDED) 6" MIN FREEBOARD ABOVE OVERFLOW WS TO TOP OF BERM OR ADJACENT ROADWAY BIORETENTIONSOIL MIX PERREFERENCE 11-C,MIN.18" DEPTH MAX SLOPE 3H:1V BELOWOVERFLOW WATER SURFACE ELEVATION (TYP.) MAINTENANCE INSTRUCTIONS FOR A BIORETENTION CELL Your property contains an on-site BMP (best management practice) called “bioretention,” which was installed to mitigate the stormwater quantity and quality impacts on both the impervious (paved or roof) and pervious surfaces (lawn or landscape) on your property. Bioretention cells, like rain gardens, are vegetated closed depressions or ponds that retain and filter stormwater from an area of impervious surface or nonnative pervious surface. Bioretention cells rely on effective infiltration performance more so than rain gardens. The soil in the bioretention cell has been enhanced to encourage and support vigorous plant growth that serves to filter the water and sustain a minimum infiltration capacity. Depending on soil conditions, bioretention cells may have water in them throughout the wet season and may overflow during major storm events. However, standing water can also be an indicator that periodic maintenance is required to sustain infiltrative performance. This on-site BMP shall be maintained per Appendix A of the City of Renton’s Surface Water Design Manual. MAINTENANCE RESTRICTIONS The size, placement, and design of the rain garden as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. Chemical fertilizers and pesticides must not be used. INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES • Bioretention cells must be inspected annually for physical defects and sediment accumulation. • Bioretention cells have inflow and overflow inlets and outlets. These need to be maintained to ensure that water is moving into and out of the bioretention area. Check inlets/outlets for debris/sediment blockage, bare spots (exposed soil), or other signs of erosion damage (soil movement). Remove debris and obstructions as necessary. • After major storm events, the bioretention cell should be checked to see that the overflow system is working properly and sedimentation is not occurring at the inlet. If erosion damage or bare spots are evident, they should be stabilized with soil, plant material, mulch, or landscape rock. Sediment deposits should be carefully removed and the sediment source eliminated. • Plants must be adapted to wet winter conditions and dry summer conditions. Vegetation is to be watered and pruned as needed. • Frequent watering is required to keep the plants healthy: o Year 1: weekly, o Year 2: bimonthly, o Year 3: bimonthly, o Year 4 and beyond: as needed for established plantings and dry periods. • Chemical fertilizers and pesticides must not be used. • Bioretention soil must be replaced in areas where sediment accumulation is preventing adequate infiltration of water through the soil. • Compacted soil should be decompacted. • Trash and debris must be removed often from the bioretention depression. • Mulch must be applied to bare soil at a minimum of 2 inches to maintain healthy growth. • Compost may be added if soil nutrients are no longer adequate to support plant growth. • Plant materials may be changed to suit tastes. • Vegetation should be maintained as follows: 1) Replace all dead vegetation as soon as possible; 2) Remove fallen leaves and debris as needed; 3) Remove all noxious vegetation when discovered; 4) Manually weed without herbicides or pesticides; 5) To protect infiltration performance, do not compact soils in the bioretention cell with heavy maintenance equipment and/or excessive foot traffic; 6) During drought conditions, use mulch to prevent excess solar damage and water loss. RECORDING REQUIREMENT These bioretention on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. TYPICAL BIORETENTION CELL (SPILLWAY OR CATCH BASIN OUTLET) TREES, SHRUBS GROUND COVER BIORETENTION AREA PLAN VIEW NTS VEGETATEDCOMPACTEDEARTH BERM ROCKED SPILLWAY, 2'Wx4'L (OR BEYOND BERM IF LONGER), OVERFLOW TOSUITABLE DISCHARGE AREA TREES, SHRUBS GROUND COVER BIORETENTION AREA PLAN VIEW NTS VEGETATED COMPACTED EARTH BERM, TOP WIDTH2' MIN 4" RIGID PIPE OUTLET TO STORM SYSTEM CATCH BASINw/GRATE SECTION A-ANTS BIORETENTION AREA GROUNDCOVER TREES TREES SHRUBS 6" MIN TO 12" MAX WATER DEPTH OVERFLOW TO SUITABLE SURFACEDISCHARGE AREA 2' MIN TOP WIDTH COMPACTED EARTHBERM (AS NEEDED) 6" MIN FREEBOARD ABOVE OVERFLOW WS TO TOP OF BERM OR ADJACENT ROADWAY BIORETENTIONSOIL MIX PERREFERENCE 11-C, MIN.18" DEPTH MAX SLOPE 3H:1V BELOW OVERFLOW WATERSURFACE ELEVATION (TYP.) MAINTENANCE INSTRUCTIONS FOR VEGETATED PERMEABLE PAVEMENT (GRASSED MODULAR GRID PAVEMENT) Your property contains an on-site BMP (best management practice) called “grassed modular grid pavement,” which was installed to minimize the stormwater quantity and quality impacts of some or all of the paved surfaces on your property. Grassed modular grid pavement has the runoff characteristics of a lawn while providing the weight- bearing capacity of concrete pavement. The grassed surface not only minimizes runoff quantity, it helps to filter pollutants generating by vehicular use of the surface. MAINTENANCE RESTRICTIONS The composition and area of grassed modular grid pavement as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES • Grassed modular grid pavement must be inspected after one major storm each year to make sure it is working properly. More frequent inspection is recommended. • Prolonged ponding or standing water on the pavement surface is a sign that the system is defective and may need to be replaced. If this occurs, or if any modification, surface restoration or stabilization is planned (except for mowing and periodic maintenance), contact the pavement installer or the City of Renton for further instructions. • The grassed surface of the pavement must be regularly mowed and maintained in a good condition. Bare spots must be replanted in the spring or fall. RECORDING REQUIREMENT These vegetated permeable pavement on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. MAINTENANCE INSTRUCTIONS FOR PERMEABLE PAVEMENT (NON-VEGETATED) Your property contains an on-site BMP (best management practice) called “permeable pavement,” which was installed to minimize the stormwater quantity and quality impacts of some or all of the paved surfaces on your property. Permeable pavements reduce the amount of rainfall that becomes runoff by allowing water to seep through the pavement into a free-draining gravel or sand bed, where it can be infiltrated into the ground. This on-site BMP shall be maintained per Appendix A of the City of Renton’s Surface Water Design Manual. Permeable Pavements The type(s) of permeable pavement used on your property is (CHECK THE BOX(ES) THAT APPLY):  Porous concrete  Porous asphalt  Permeable pavers  Modular grid pavement MAINTENANCE RESTRICTIONS The area covered by permeable pavement as depicted by the site plan and design details must be maintained as permeable pavement and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES • Permeable pavements must be inspected after one major storm each year to make sure it is working properly. More frequent inspection is recommended. • Prolonged ponding or standing water on the pavement surface is a sign that the system is defective and may need to be replaced. If this occurs, contact the pavement installer or the City of Renton for further instructions. • A typical permeable pavement system has a life expectancy of approximately 25 years. To help extend the useful life of the system, the surface of the permeable pavement should be kept clean, stable and free of leaves, debris, and sediment through regular sweeping or vacuum sweeping. Aggregate fill in modular grid pavement may need periodic surface replenishment. • The owner is responsible for the repair of all ruts, deformation, and/or broken paving grids or pavers. • Modular grid pavement and permeable pavers filled with gravel or with gravel in the joints may need to be refilled periodically. RECORDING REQUIREMENT These permeable pavement on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. MAINTENANCE INSTRUCTIONS FOR BASIC DISPERSION Your property contains an on-site BMP (best management practice) called “basic dispersion,” which was installed to mitigate the stormwater quantity and quality impacts of some or all of the impervious surfaces or non-native pervious surfaces on your property. Basic dispersion is a strategy for utilizing any available capacity of onsite vegetated areas to retain, absorb, and filter the runoff from developed surfaces. This on-site BMP has two primary components that must be maintained: (1) The devices that disperse runoff from the developed surfaces and (2) The vegetated area over which runoff is dispersed. Dispersion Devices The dispersion devices used on your property include the following as indicated on the site plan (CHECK THE BOX(ES) THAT APPLY):  splash blocks,  rock pads,  gravel filled trenches,  sheet flow. MAINTENANCE RESTRICTIONS The size, placement, composition, and downstream flowpaths of these devices as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES This on-site BMP has two primary components that must be maintained per Appendix A of the City of Renton’s Surface Water Design Manual: (1) The devices that disperse runoff from the developed surfaces and (2) The vegetated flowpath area over which runoff is dispersed. Maintenance of Dispersion Devices • Dispersion devices must be inspected annually and after major storm events to identify and repair any physical defects. • When native soil is exposed or erosion channels are present, the sources of the erosion or concentrated flow need to be identified and mitigated. • Concentrated flow can be mitigated by leveling the edge of the pervious area and/or realigning or replenishing the rocks in the dispersion device, such as in rock pads and gravel filled trenches. Maintenance of Vegetated Flowpaths • The vegetated area over which runoff is dispersed must be maintained in good condition free of bare spots and obstructions that would concentrate flows. RECORDING REQUIREMENT These basic dispersion on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. TYPICAL SPLASH BLOCK TYPICAL 10-FOOT DISPERSION TRENCH CROSS-SECTION TYPICAL DRIVEWAY APPLICATION OF DISPERSION TRENCH AND ROCK PAD SIDE VIEWNTS HOUSE DOWNSPOUTEXTENSION SPLASHBLOCK ROOF DOWNSPOUT SPLASH BLOCK 100' MIN. VEGETATEDFLOWPATH UNDERFULL DISPERSION,SEE SECTION C.2.1.3 10-foot long dispersion trench Vegetated Flowpath Segment (NVFS) Slot drain Diagonal asphalt berm – 2 to 4 inches high PLAN VIEW OF DRIVEWAY NTS 2-ft x 3-ft x 6-inch crushed rock pad 50-foot separation between flowpath segments Vegetated Flowpath Segment Edge of undisturbed native vegetation MAINTENANCE INSTRUCTIONS FOR LIMITED INFILTRATION Your property contains an on-site BMP (best management practice) called “limited infiltration,” which was installed to mitigate the stormwater quantity and quality impacts of some or all of the impervious surfaces on your property. Limited infiltration is a method of soaking runoff from impervious area (such as paved areas and roofs) into the ground. Infiltration devices, such as gravel filled trenches, drywells, and ground surface depressions, facilitate this process by putting runoff in direct contact with the soil and holding the runoff long enough to soak most of it into the ground. To be successful, the soil condition around the infiltration device must be able to soak water into the ground for a reasonable number of years. This on-site BMP shall be maintained per Appendix A of the City of Renton’s Surface Water Design Manual. Infiltration Devices The infiltration devices used on your property include the following as indicated on the site plan (CHECK THE BOX(ES) THAT APPLY):  gravel filled trenches,  drywells MAINTENANCE RESTRICTIONS The size, placement, and composition of these devices as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES To be successful, the soil condition around the infiltration device must be able to soak water into the ground for a reasonable number of years. • Infiltration devices must be inspected annually and after major storm events to identify and repair any physical defects. • Maintenance and operation of the system should focus on ensuring the system's viability by preventing sediment-laden flows from entering the device. Excessive sedimentation will result in a plugged or non-functioning facility. • If the infiltration device has a catch basin, sediment accumulation must be removed on a yearly basis or more frequently if necessary. • Prolonged ponding around or atop a device may indicate a plugged facility. If the device becomes plugged, it must be replaced. • Keeping the areas that drain to infiltration devices well swept and clean will enhance the longevity of these devices. • For roofs, frequent cleaning of gutters will reduce sediment loads to these devices. RECORDING REQUIREMENT These limited infiltration on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. INFILTRATION TRENCH AND DRYWELL SYSTEMS 6" 24" 12" 24" WASHED ROCK 1 12"- 34" LEVEL INFILTRATION TRENCH SECTION A NTS PLAN VIEWNTS SECTION VIEWNTS VARIES A A 6" 6" 4" RIGID OR 6"FLEXIBLEPERFORATEDPIPE CB SUMP w/SOLID LID ROOF DRAIN 4" RIGID OR 6" FLEXIBLEPERFORATED PIPE OVERFLOW SPLASH BLOCK ROOF DRAIN CB SUMP w/SOLID LID 12" FINE MESHSCREEN SETBACKFROMBUILDING5' MIN. 1' MIN.1' MIN. FILTER FABRIC COMPACTED BACKFILL 4" RIGID OR 6" FLEXIBLEPERFORATED PIPE 112" - 34" WASHED ROCK MIN. 1' ABOVE SEASONAL HIGH GROUNDWATER TABLE, SEE SECTION C.2.2.2 TRENCH SETBACK FROMBUILDING AS REQUIRED,15' MIN. DRIVEWAY X-SECTION NTS 2' MIN. FILTER STRIP SEE SECTIONS6.3.4 & 6.3.5 18" MIN. 6" MIN. 3/4" TO 1-1/2"WASHED DRAINROCK GRASS OVERFLOW NOTE:SEE C.2.2.3 FORTRENCH LENGTHS, TRENCH SPACING ANDSITE LIMITATIONS MIN. 1' ABOVESEASONAL HIGHGROUNDWATERTABLE, SEESECTION C.2.2.2 X-SECTIONNTS GRASS 2' MIN. 18" MIN. 6" MIN. 3/4" TO 1-1/2"WASHED DRAINROCK OVERFLOW 15' MIN. ASREQUIRED,SEE C.2.2.3 FROM ROOF NS T T S MIN. 1' ABOVESEASONAL HIGHGROUNDWATERTABLE, SEESECTION C.2.2.2 HOUSE FLOW 48 INCH DIAMETERHOLE FILLED WITH 1 12" - 3" WASHEDDRAIN ROCK SECTIONNTS MARK CENTER OF HOLEWITH 1" CAPPED PVCOR OTHER MEANSFLUSH WITH SURFACE ROOF DOWNSPOUT OVERFLOW SPLASH BLOCK TOPSOIL FINE MESH SCREEN MIN. 4" DIA.PVC PIPE SIDES OF HOLELINED WITHFILTER FABRIC CATCH BASIN(YARD DRAIN) 15' MIN. AS REQUIRED, SEE SECTION C.2.2.3 VARIES 1' MIN. MIN. 1' ABOVE SEASONALHIGH GROUNDWATER TABLE,SEE SECTION C.2.2.2 5' MIN. SETBACKFROM BUILDING FLOW PLAN VIEWNTS HOUSE ROOFDOWNSPOUT ROOFDOWNSPOUT CATCH BASIN(YARD DRAIN) 48 INCH DIAMETERHOLE FILLED WITH1 12" - 3" WASHEDDRAIN ROCK MAINTENANCE INSTRUCTIONS FOR RAINWATER HARVESTING Your property contains an on-site BMP (best management practice) called “rainwater harvesting,” which was installed to minimize the stormwater runoff impacts of impervious surface on your property. Rainwater harvesting is a means for the collection and storage of roof runoff for domestic or irrigation use. Rainwater harvesting systems include a collection area, a filtering system, a storage device, and an outflow device. This on-site BMP shall be maintained per Appendix A of the City of Renton’s Surface Water Design Manual. MAINTENANCE RESTRICTIONS The size, components, and configuration of the rainwater system as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES Rainwater harvesting systems include a collection area, a filtering system, a storage device, and an outflow device: • The collection area (e.g., roof) should be routinely inspected for debris and other material that could impede the entrance and/or exit of surface flows. • The filtering system should be periodically inspected for effectiveness and replaced or replenished as recommended by the manufacturer. • The storage device must be drained completely during the dry season (May 1 – September 30) in order to provide the needed capacity for an entire wet season. • A maintenance log should be kept on site with the aforementioned information and dates of maintenance performance. City of Renton inspection staff may request to view the maintenance log at any time. RECORDING REQUIREMENT These rainwater harvesting on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. RAINWATER HARVESTING SYSTEM DESIGN REQUIREMENTS: • To ensure the system functions as designed and provides the required stormwater management, system-specific maintenance and operation instructions must be submitted with the small project drainage plan and approved by the City of Renton. Such instructions should be prepared by the system’s manufacturer or installer. • A minimum 5-foot setback shall be maintained between any part of the rainwater harvesting system and any property line. TYPICAL ABOVE GROUND RESERVOIR CONFIGURATION (STENSROD, 1978) VARIOUS POSSIBLE CONFIGURATIONS (TYPICAL) (STENSROD, 1978) MAINTENANCE INSTRUCTIONS FOR VEGETATED ROOFS Your property contains an on-site BMP (best management practice) called a “vegetated roof,” which was installed to minimize the stormwater runoff impacts of the impervious surfaces on your property. Vegetated roofs (also called green roofs) consist of a pervious growing medium, plants, and a moisture barrier. The benefits of this device are a reduction in runoff peaks and volumes due to the storage capabilities of the soil and increased rate of evapotranspiration. This on-site BMP shall be maintained per Appendix A of the City of Renton’s Surface Water Design Manual. MAINTENANCE RESTRICTIONS • The composition and area of vegetated roof as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. • Vegetated roofs must not be subject to any use that would significantly compact the soil. INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES Vegetated roofs (also called green roofs) consist of a pervious growing medium, plants, and a moisture barrier: • Vegetated roofs must be inspected annually for physical defects and to make sure the vegetation is in good condition. • If erosion channels or bare spots are evident, they should be stabilized with additional soil similar to the original material. • A supplemental watering program may be needed the first year to ensure the long-term survival of the roof's vegetation. • Vegetation should be maintained as follows: (1) Vegetated roofs must not be subject to any use that would significantly compact the soil; (2) Replace all dead vegetation as soon as possible; (3) Remove fallen leaves and debris; (4) Remove all noxious vegetation when discovered; (5) Manually weed without herbicides or pesticides RECORDING REQUIREMENT These vegetated roof on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. TYPICAL VEGETATED ROOF CROSS-SECTION MAINTENANCE INSTRUCTIONS FOR REDUCED IMPERVIOUS SURFACE BMP: RESTRICTED FOOTPRINT Your property contains an on-site BMP (best management practice) known as “restricted footprint,” the practice of restricting the amount of impervious surface that may be added to a property so as to minimize the stormwater runoff impacts caused by impervious surface. MAINTENANCE RESTRICTIONS The total impervious surface on your property may not exceed ___________ square feet without written approval from the City of Renton or through a future development permit from the City of Renton. RECORDING REQUIREMENT These reduced impervious surface on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. MAINTENANCE INSTRUCTIONS FOR REDUCED IMPERVIOUS SURFACE BMP: WHEEL STRIP DRIVEWAY Your property contains an on-site BMP (best management practice) called a “wheel strip driveway,” which was installed to minimize or mitigate for the stormwater runoff impacts of some or all of the impervious surfaces on your property. MAINTENANCE RESTRICTIONS The placement and composition of the wheel strip driveway as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. RECORDING REQUIREMENT These reduced impervious surface on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. WHEEL STRIP DRIVEWAY DESIGN REQUIREMENTS for the typical 10-foot driveway width: • The two pavement strips must be no more than 2.5 feet wide. • At least 4 feet of the 10-foot driveway width must be amended soil planted with grass. • The amended soil must consist of at least 4 inches of well-rotted compost tilled into the upper 8 inches of the soil between the impervious strips. MAINTENANCE INSTRUCTIONS FOR REDUCED IMPERVIOUS SURFACE BMP: MINIMUM DISTURBANCE FOUNDATION Your property contains an on-site BMP (best management practice) known as a “minimum disturbance foundation,” which was installed to minimize or mitigate for the stormwater runoff impacts of some or all of the impervious surfaces on your property. This means that all or a portion of the finished living space in your house is elevated over a pervious surface through the use of piers or piles. The pervious surface is intended to provide additional capacity to absorb and store the stormwater runoff from your roof and surrounding areas. MAINTENANCE RESTRICTIONS • The design of this system as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. • In addition, the pervious surface beneath the elevated portion of your house must not be used in manner that compacts the soil or provides an opportunity for pollutants to enter the soil or storm runoff. RECORDING REQUIREMENT These reduced impervious surface on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. MINIMUM DISTURBANCE FOUNDATION DESIGN REQUIREMENTS • The pervious surface beneath the elevated portion of the structure must be either undisturbed native soil or amended soil. Any amended soil must consist of at least 4 inches of well-rotted compost tilled into the upper 8 inches of the soil. • Runoff from the structure must be discharged via downspouts or sheet flow onto a vegetated surface or into a 4- to 6-inch gravel bed within close proximity of the elevated structure. Runoff discharging from downspouts onto a vegetated surface must be via splash blocks. MAINTENANCE INSTRUCTIONS FOR REDUCED IMPERVIOUS SURFACE BMP: OPEN GRID DECKING OVER PERVIOUS SURFACE Your property contains an on-site BMP (best management practice) called “open grid decking over pervious surface,” which was installed to minimize or mitigate for the stormwater runoff impacts of some or all of the impervious surfaces on your property. The decking has evenly spaced openings that allow rain water to reach the uncompacted soil below, where it has an opportunity to soak into the ground. MAINTENANCE RESTRICTIONS • The area and openings of the decking as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. • In addition, the pervious surface beneath the decking must not be used in manner that compacts the soil. INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES • Check monthly or as needed (e.g., weekly during the autumn season) to assure openings in the decking are not blocked and are draining freely. Sweep and/or vacuum as needed. • Avoid the use of chemicals or other pollutants on the deck where they have an opportunity to pass through the decking and soak into the ground. RECORDING REQUIREMENT These reduced impervious surface on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. OPEN GRID DECKING DESIGN REQUIREMENTS: • The pervious surface beneath the decking must be either undisturbed native soil or amended soil. • Any amended soil must consist of at least 4 inches of well-rotted compost tilled into the upper 8 inches of the soil. MAINTENANCE INSTRUCTIONS FOR NATIVE GROWTH RETENTION CREDIT Your property contains an on-site BMP (best management practice) known as “native growth retention,” the practice of preserving a portion of a property in a native vegetated condition (e.g., forest) so as to minimize increases in stormwater runoff from clearing and to offset the stormwater runoff impacts caused by impervious surfaces on your property. This native vegetated area on your property was set aside by covenant as “native growth retention area.” This on-site BMP shall be maintained per Appendix A of the City of Renton’s Surface Water Design Manual. MAINTENANCE RESTRICTIONS The “native growth retention area” is delineated on the site plan attached to the covenant. The trees, vegetation, ground cover, and soil conditions in this area may not be disturbed, except as allowed by the following provisions: 1. Trees may be harvested in accordance with a King County-approved forest management plan if approved by King County prior to annexation to the City. 2. Individual trees that have a structural defect due to disease or other defects, and which threaten to damage a structure, road, parking area, utility, or place of employment or public assembly, or block emergency access, may be topped, pruned, or removed as needed to eliminate the threat. 3. Dead or fallen trees, tree limbs within ten feet of the ground, and branches overhanging a residence may be removed to reduce the danger of wildfire. 4. Noxious weeds (i.e., plant species listed on the State noxious weed list in Chapter 16-750 WAC) and invasive vegetation (i.e., plant species listed as obnoxious weeds on the noxious weed list adopted by King County) may be removed. 5. Passive recreation uses and related facilities, including pedestrian, equestrian community and bicycle trails, nature viewing areas, fishing and camping areas, and other similar uses that do not require permanent structures, are allowed if clearing and soil compaction associated with these uses and facilities does not exceed eight percent of the native growth retention area. RECORDING REQUIREMENT These native growth retention credit on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton) may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. MAINTENANCE INSTRUCTIONS FOR A PERFORATED PIPE CONNECTION Your property contains an on-site BMP (best management practice) called a “perforated pipe connection,” which was installed to reduce the stormwater runoff impacts of some or all of the impervious surface on your property. A perforated pipe connection is a length of drainage conveyance pipe with holes in the bottom, designed to “leak” runoff, conveyed by the pipe, into a gravel filled trench where it can be soaked into the surrounding soil. The connection is intended to provide opportunity for infiltration of any runoff that is being conveyed from an impervious surface (usually a roof) to a local drainage system such as a ditch or roadway pipe system. This on-site BMP shall be maintained per Appendix A of the City of Renton’s Surface Water Design Manual. MAINTENANCE RESTRICTIONS • The size and composition of the perforated pipe connection as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. • The soil overtop of the perforated portion of the system must not be compacted or covered with impervious materials. RECORDING REQUIREMENT These perforated pipe connection on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. TYPICAL PERFORATED PIPE CONNECTION FOR A SINGLE FAMILY RESIDENCE MAINTENANCE INSTRUCTIONS FOR SOIL AMENDMENT Your property contains an on-site BMP (best management practice) called “soil amendment,” which was installed to mitigate the stormwater quantity and quality impacts of some or all of the pervious surfaces on your property. Soil amendment is a method of regaining greater stormwater functions in the post development landscape by increasing treatment of pollutants and sediments, and minimizing the need for some landscaping chemicals. To be successful, the soil condition must be able to soak water into the ground for a reasonable number of years. This on-site BMP shall be maintained per Appendix A of the City of Renton’s Surface Water Design Manual. MAINTENANCE RESTRICTIONS The size, placement, and composition of these devices as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES To be successful, the soil must be able to soak water into the ground for a reasonable number of years. • Return leaf fall and shredded woody materials from the landscape to the site when possible in order to replenish soil nutrients and structure. • On turf areas, “grasscycle” (mulch-mow or leave the clippings) to build turf health. • Maintain 2 to 3 inches of mulch over bare areas in landscape beds. • Re-seed bare turf areas until the vegetation fully covers the ground surface. • Avoid using pesticides (bug and weed killers) which damage the soil. • Where fertilization is needed (mainly turf and annual flower beds), a moderate fertilization program should be used which relies on compost, natural fertilizers, or slow-release synthetic balanced fertilizers. RECORDING REQUIREMENT These on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. MAINTENANCE INSTRUCTIONS FOR TREE RETENTION Your property contains an on-site BMP (best management practice) called “tree retention,” which was installed to mitigate the stormwater quantity and quality impacts of some or all of the impervious surfaces on your property. Tree retention provides flow control via interception, transpiration, and increased infiltration. This on- site BMP shall be maintained per Appendix A of the City of Renton’s Surface Water Design Manual. MAINTENANCE RESTRICTIONS The size, placement, and composition of these devices as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES To be successful, the soil must be able to soak water into the ground for a reasonable number of years. • Trees should be pruned in an appropriate manner for each species. • Pruning should be performed by landscape professionals familiar with proper pruning techniques. • Dead trees shall be replaced with like species within 30 days (as practical depending on weather/planting season). RECORDING REQUIREMENT These on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. (This page intentionally left blank.)