Loading...
The URL can be used to link to this page
Your browser does not support the video tag.
Home
My WebLink
About
RS_Drainage_Technical_Information_Report_180515_v3.pdf
Technical Information Report (TIR) Renton Senior Housing RJ Development Preliminary May 2018 SCJ Alliance May 2018 Technical Information Report Project Information Project: Renton Senior Housing Prepared for: RJ Development Reviewing Agency Jurisdiction: City of Renton Project Representative Prepared by: SCJ Alliance 8730 Tallon Lane NE, Suite 200 Lacey, WA 98516 360.352.1465 scjalliance.com Contact: Ross Jarvis, PE Project Reference: SCJ #2386.03 Path: N:\Projects\2386 RJ Development\2386.03 Renton Senior Housing\Phase Number\Design\Storm\Technical Information Report.docx SCJ Alliance May 2018 Page i TABLE OF CONTENTS 1. Project Overview ........................................................................................................ 2 1.1 Project Overview ................................................................................................................... 2 1.2 Predeveloped Site Conditions ............................................................................................... 3 1.3 Soils ........................................................................................................................................ 3 2. Conditions and Requirements Summary ..................................................................... 3 3. Offsite Analysis .......................................................................................................... 5 3.1 Downstream Analysis ............................................................................................................ 5 3.2 Upstream Analysis ................................................................................................................. 6 3.3 Resource Review ................................................................................................................... 6 3.4 Field investigation ................................................................................................................. 6 3.5 Drainage System Description and Problem Descriptions ...................................................... 6 4. Flow Control, Low Impact Development (LID) and Water Quality Facility Analysis and Design ................................................................................................................................ 6 4.1 Existing Site Hydrology .......................................................................................................... 6 4.2 Developed Site Hydrology ..................................................................................................... 6 4.3 Performance Standards ......................................................................................................... 7 4.4 On-Site BMPs ......................................................................................................................... 7 4.5 Flow Control System .............................................................................................................. 8 4.6 Water Quality System ............................................................................................................ 8 5. Conveyance System Analysis and Design ..................................................................... 8 6. Special Reports and Studies ........................................................................................ 9 7. Other Permits ............................................................................................................. 9 8. CSWPP Analysis and Design ........................................................................................ 9 8.1 ESC Plan Analysis and Design ................................................................................................ 9 8.2 SWPPS Plan Design .............................................................................................................. 10 9. Bond Quantities, Facility Summaries, and Declaration of Covenant ........................... 11 10. Operations and Maintenance Manual ....................................................................... 11 SCJ Alliance May 2018 Page ii LIST OF APPENDICES Appendix A: Determination of Minimum Requirements Worksheets Appendix B: Site Vicinity Maps Appendix C: Basin Map Exhibits Appendix D: Off-Site Analysis Appendix E: Design Calculations and Computations Appendix F: Stormwater Plan Sheets Appendix G: Geotechnical Report Appendix H: Construction SWPPP Appendix I: Worksheets Appendix J: Operations and Maintenance Manual Appendix K: Declaration of Covenant Renton Senior Housing 2 of 11 Technical Information Report 1. PROJECT OVERVIEW The following report was prepared for the proposed Senior Housing Facility and parking lot in Renton. This report was prepared to comply with the minimum technical standards and requirements that are set forth in the 2016 City of Renton Surface Water Design Manual (Manual). 1.1 PROJECT OVERVIEW Project Proponent: RJ Development, LLC Parcel Numbers: 312305-9067, 312305-9094 Total Parcel Area: 4.75 acres Current Zoning: Commercial Required Permits: Utility, building, grading, paving, etc. Site Address: 4500 Talbot Road SE The proposed Renton Senior Housing Facility site is located on two parcels adding up to 4.75 acres. The project is located east of the intersection between Talbot Road South and South 45th Place in Renton, Washington. The site is bordered to the north and south by existing commercial and residential development, to the east by undeveloped land, and to the west by Talbot Road South. A site vicinity map of the proposed project location is enclosed herein as Appendix B. The proposed construction includes the Senior Housing Facility building and pool house as well as the associated parking, utilities, frontage improvements, and stormwater improvements, disturbing approximately 3.55 acres. Specifically, the proposed site improvements/construction activities for this project include the following: · Site preparation, grading, and erosion control activities · Construction of Senior Housing Facility and associated parking · Construction/installation of on-site water quality and flow control facilities · Extension of available utilities (i.e., water, sewer, etc.) Table 1 describes the land use of the proposed drainage basin. See the Existing and Proposed Drainage Basin Exhibits in Appendix C. Renton Senior Housing 3 of 11 Technical Information Report Table 1: On-site Land Type Designations Summary Section LAND TYPE DESIGNATIONS AREA (ACRES) % OF TOTAL AREA Total Site Area 4.75 100 Existing Pervious Surface 4.75 100 Existing Impervious Surface 0 0 Drainage Basin Areas 4.75 100 Proposed Pervious Surface 0.98 20.63 Undisturbed Pervious 1.00 21.05 Proposed Pavement Surface 1.29 27.16 Proposed Roof Surface 1.03 21.68 Proposed Sidewalk Surface 0.45 9.47 A TIR worksheet is included in Appendix I. 1.2 PREDEVELOPED SITE CONDITIONS The site is heavily forested. A single-family residence once occupied a small portion of the site area but appears to have been demolished and removed from the property. The existing access road, however, still remains. Topography generally ascends gently to the east. The eastern site area maintains a general gradient of 30 percent while the central and western site area maintains a flatter gradient, on the order of approximately 10 percent. There are no current drainage flow control facilities on the site. 1.3 SOILS According to the Geotechnical Study completed by Earth Solutions NW LLC (ESNW) in August 2017, the soils on-site contain topsoil in the upper 12 to 18 inches and the native soil below consists of silty sand. A geologic map that is referenced in the study identifies Ground Moraine Deposits across the site and surrounding areas. Groundwater seepage was identified in a few test pits two feet below existing grade when they were dug in November 2017. It is believed groundwater is likely to be encountered during construction activities. They also determined, in general, the native soil they encountered is not suitable for infiltration. Due to no infiltration in the native soil and high groundwater, the StormCapture system will have a solid bottom. 2. CONDITIONS AND REQUIREMENTS SUMMARY A Full Drainage Review is required for the project, according to the Flow Chart for Determining Type of Drainage Review Required. The flow chart is attached in Appendix A. According to the Manual, a project that requires a Full Drainage Review is also required to address all nine core requirements and all six special requirements. Renton Senior Housing 4 of 11 Technical Information Report Summary of Compliance On-Site The stormwater design complies with all nine core requirements and all six special requirements as follows: Core Requirement #1 – Discharge at the Natural Location – On-site generated stormwater runoff will be detained and released to the City’s stormwater conveyance system. Currently, the runoff either infiltrates on-site or sheet flows to the City’s stormwater system along Talbot Road. Core Requirement #2 – Offsite Analysis – A Level 1 upstream and downstream analysis has been completed and can be found in Section 3 of this Report. Core Requirement #3 – Flow Control – A stormwater detention vault will be constructed as a part of this project. On-site stormwater will be released at the predeveloped flow rates. Core Requirement #4 – Conveyance System – The on-site stormwater conveyance system will be designed to route the 25-year peak flow event. Core Requirement #5 – Erosion and Sediment Control – A Construction Stormwater Pollution Prevention (CSWPP) Plan has been completed and can be found in Section 8. Core Requirement #6 – Maintenance and Operations – An Operation and Maintenance Manual can be found in Section 10 of the Report. The owner is aware they are responsible for operating and maintaining the stormwater system on-site. Core Requirement #7 – Financial Guarantees and Liability – The owner will maintain liability insurance and post with the City of Renton a bond, assignment of funds, or certified check. Core Requirement #8 – Water Quality – A Modular Wetland System will be used to fulfill the enhance treatment requirement. Core Requirement #9 – On-site BMPs – BMPs will be used where feasible. Due to steep slopes and minimal to no infiltration, many of the BMPs are not feasible. See Section 4.4 of this report for further discussion. Special Requirement #1 – Other Adopted Area-Specific Requirements – No additional requirements are known at this time. Special Requirement #2 – Flood Hazard Area Delineation – The proposed project is not located in or adjacent to a flood hazard area. See the FEMA flood map attached in Appendix C. This Special Requirement is not applicable. Special Requirement #3 – Flood Protection Facilities – The proposed project does not rely on an existing flood protection facility. This Special Requirement is not applicable. Special Requirement #4 – Source Control – Water quality source controls will be installed in accordance with the King County Stormwater Pollution Prevent Manual. Renton Senior Housing 5 of 11 Technical Information Report Special Requirement #5 – Oil Control – The project is not considered a high-use site; therefore, oil control is not required. Special Requirement #6 – Aquifer Protection Area – The project is not located in an Aquifer Protection Area. See the Groundwater Protection Areas Map in Appendix B. 3. OFFSITE ANALYSIS 3.1 DOWNSTREAM ANALYSIS A Level 1 Analysis was completed for this project. Stormwater from the project site will be detained and released at the predeveloped rate to an existing stormwater system on Talbot Road. The existing system conveys the water to the northwest into Panther Creek. The existing system conveys the water down Talbot Road, west on South 43rd Street, through the Valley Medical Center Complex, and then is discharged into Panther Creek. The map below shows the downstream path and the location where it is discharged. Panther Creek is considered the natural discharge location and adverse effects are not anticipated. No improvements to the conveyance system in Talbot Road are anticipated. Offsite drainage courses will not be altered. Stormwater will be released at its predeveloped rates at the natural discharge location. Consequently, downstream impacts are not anticipated. Additional site maps with contours can be found in Appendix F. Figure 1: Downstream Analysis Renton Senior Housing 6 of 11 Technical Information Report 3.2 UPSTREAM ANALYSIS There is no foreseen offsite run-on from the adjacent roadway or parcels that will be tributary to the proposed stormwater system. 3.3 RESOURCE REVIEW Flood Hazard Zone The flood hazard areas within this portion of Renton, Washington, are delineated on the Federal Emergency Mapping Agency (FEMA) National Flood Insurance Program – Flood Insurance Rate Map (FIRM) No 53033C0979F, revised May 16, 1995. The project site does not lie in a Flood Zone. See Appendix C for a copy of the FEMA map. Critical Areas According to City of Renton’s GIS site, there are critical areas on the eastern portion of the site. There is high erosion hazard, steep slopes, landslide potential, and regulated slopes. The critical areas located on the project parcels will remain undeveloped. The closest wetland to the site is upstream about 700 feet away. 3.4 FIELD INVESTIGATION An in-depth Inspection will be completed prior to the final submittal. 3.5 DRAINAGE SYSTEM DESCRIPTION AND PROBLEM DESCRIPTIONS An Offsite Analysis Drainage System Table is attached in Appendix D. 4. FLOW CONTROL, LOW IMPACT DEVELOPMENT (LID) AND WATER QUALITY FACILITY ANALYSIS AND DESIGN 4.1 EXISTING SITE HYDROLOGY Currently, on-site generated stormwater that does not infiltrate directly in the soils flows offsite towards Talbot Road. There are no current drainage flow control facilities on the site. The geotechnical report classified the site soils as type C. See attached Existing Drainage Basin Exhibit in Appendix C. 4.2 DEVELOPED SITE HYDROLOGY The developed site hydrology was modeled using the areas in Table 1 of this report. Refer to Appendix F for the stormwater plan sheets and the full proposed stormwater design. Renton Senior Housing 7 of 11 Technical Information Report 4.3 PERFORMANCE STANDARDS According to Section 1.2.3.1 in the Manual and the City of Renton Flow Control Application Map, attached in Appendix B, the site must meet the Flow Control Duration Standard – Matching Forested requirements. From Table 1.2.3.A the project must apply the Flow Control Duration Standard, which matched the flow duration of predeveloped rates for forested site conditions over the range of flows extending from 50% of two years up to the full 50-year flow and matches peaks for the two- and ten- year return periods. See Section 4.4 of this section for the design of the flow control system. According to Section 1.2.4.1 of the Manual, this project requires the new pipe systems to be able to convey and contain the 25-year peak flows. See Section 5 for the conveyance system analysis. The project is a commercial site and according to Section 1.2.8.1.A of the Manual enhanced treatment is required. No additional source control or oil control is required. See part 4.5 of this section for the design of the water quality system. 4.4 ON-SITE BMPS Using Appendix C of the Manual, specific BMPs were determined feasible or infeasible for this project. A geotechnical report was completed in August 2017. It was determined in the report that the site is not suitable for infiltration. Groundwater seepage was also encountered in areas two feet below existing ground. See below for more in-depth infeasibility discussion. Section C.1.3.2 of the Manual lays out Large Lot BMP Requirements. · Requirement #1: Full Dispersion (Section C2.1) – Per the Infeasibility Criteria in Section C2.1, Full dispersion is not considered feasible where the stormwater discharge would be towards slopes greater than 15%. Dispersion on the project parcel would only be possible to the east however, steep slopes and retaining walls make dispersion onto the native vegetation infeasible. · Requirement #2: Full Infiltration of Roof Runoff (Section C2.2) – Per the Infeasibility Criteria in Section C2.2, Full infiltration is not considered feasible where geotechnical evaluation deems infiltration not possible. Per the geotechnical report completed in August 2017 (See Appendix G) the site was determined not to be suitable for infiltration. It is also important to note that steep slopes and high groundwater also make infiltration not feasible for this project. · Requirement #3: Full Infiltration (Section C2.2), Limited Infiltration (Section C2.3), Bioretention (Section C2.6), Permeable Pavement (Section C2.7) – Per the Infeasibility Criteria in Sections C2.2, C2.3, C2.6, and C2.7, none of these BMPs are feasible for the same reasons listed above. Per the geotechnical report and the steep slopes on-site infiltration is not feasible for this project. · Requirement #4: Basic Dispersion (Section C2.4) – Per the Infeasiblity Criteria in Section C2.4, basic dispersion is not feasible for the project due to the steep slopes and the geotechnical report (see above). · Requirement #5: On-Site BMP Application Rates – Per Table C1.3.A, the project site has approximately 55% proposed impervious surface coverage, and therefore requires that 35% of the target impervious surface be mitigated by on-site BMPs. Approximately 1.05 acres of the Renton Senior Housing 8 of 11 Technical Information Report project site will be considered undisturbed, and will remain forested with native vegetation. Due to the steep slopes (over 15%) of the undisturbed portion of the project site, none of this area can be used for the reduced impervious surface credit (Section C2.9), Native Growth Retention Credit (Section C2.10), and the Tree Retention Credit (Section C2.14). Due to the retaining walls surrounding the project, no stormwater runoff will be allowed to flow onto the native vegetation or the steep slopes, therefore making these credits infeasible. · Requirement #6 – The soil moisture holding capacity of the new pervious surfaces will be protected in accordance with the soil amendment BMP as detailed in Section C2.13. All the areas that are being preserved will be protected from compaction during construction. · Requirement #7 – The proposed roof downspouts will be connected into the stormwater detention vault on-site, therefore not connecting into the local drainage system and not requiring a perforated pipe connection per Section C2.11. 4.5 FLOW CONTROL SYSTEM One (1) on-site detention vault will be constructed as a part of the site improvements for this project. The stormwater detention vault will be built using StormCapture units. The total number of units required for this project is 93. Each module is 8 ft by 16 ft by 8 ft deep. The amount of storage is limited to 7 ft by 15 ft by 7 ft. The modules can be placed in any configuration. See the stormwater plans in Appendix F. The vault has been designed to release stormwater off-site at the predeveloped flow rates of 50% of the two- year peak flow up to the 50-year peak flow and matches peaks for the two- and ten-year return periods. (See Appendix E for predeveloped and post developed flow rates). WWHM2012 was used to model the flow control for the proposed stormwater system. WWHM is an approved continuous flow simulation method. The vault will be constructed with a flow control structure, which will include a 1.2-inch diameter orifice at the bottom of the structure, a 1.9-inch diameter orifice 4 feet from the bottom of the structure, a 1.2-inch diameter orifice 4.5 feet from the bottom of the structure, and an 18-inch diameter riser at 6 feet from the bottom of the structure, which allows one foot of freeboard. It is important to note that the StormCapture units will have a solid bottom due to the project site not beign suitable for infiltration as well as the high groundwater, as noted in the geotechnical report. 4.6 WATER QUALITY SYSTEM A Modular Wetland System will be used to treat the roadway and parking runoff. Using WWHM, an off- line flow of 0.13 cfs needs to be treated. The MWS-L-4-13 can treat up to 0.144 cfs. The modular wetland has an internal bypass structure, so no additional structure is required to be able to use the off- line flow rate. The Modular Wetland is placed upstream of the underground vault. See the stormwater plans in Appendix F. 5. CONVEYANCE SYSTEM ANALYSIS AND DESIGN The total runoff for all of the pollution-generating impervious surfaces on site is 1.11 cfs during the 100- year storm. The capacity of a 12-inch PVC pipe sloped at 0.5% is 3.27 cfs. Because the roof area does not need to be treated, it will be collected through downspouts and discharged directly into the vault. See Appendix E for design calculations. Renton Senior Housing 9 of 11 Technical Information Report 6. SPECIAL REPORTS AND STUDIES A geotechnical report was finalized by ESNW on August 3, 2017, and is enclosed herein as Appendix G. A SEPA checklist will be submitted by the Applicant. 7. OTHER PERMITS Utility, grading, and building permits may need to be secured prior to beginning construction activities. Construction Stormwater General Permit (NPDES) from the Department of Ecology (DOE) is also required. 8. CSWPP ANALYSIS AND DESIGN 8.1 ESC PLAN ANALYSIS AND DESIGN The site was designed with the Erosion and Sediment Control Standards in mind. Each measure is described below and how the project will address the issue. 1. Clearing Limits: Prior to site clearing or grading, areas to remain undisturbed during project construction will be delineated on the project’s ESC plan and physically marked on the project site. 2. Cover Measures: Temporary and permanent cover measures shall be provided when necessary to protect disturbed areas. 3. Perimeter Protection: Perimeter protection to filter sediment from sheet flow shall be provided downstream of all disturbed areas prior to upslope grading. 4. Traffic Area Stabilization: Unsurfaced entrances, roads, and parking areas used by construction traffic shall be stabilized to minimize erosion and tracking of sediment offsite. 5. Sediment Retention: Surface water collected from all disturbed areas of the site shall be routed through a sediment pond or trap prior to release from the site, except those areas at the perimeter of the site small enough to be treated solely with perimeter protection. Sediment retention facilities shall be installed prior to grading any contributing area. 6. Surface Water Collection: Surface water collection measures (e.g., ditches, berms, etc.) shall be installed to intercept all surface water from disturbed areas, convey it to a sediment pond or trap, and discharge it downstream of any disturbed areas. Areas at the perimeter of the site, which are small enough to be treated solely with perimeter protection, do not require surface water collection. Significant sources of upstream surface water that drain onto disturbed areas shall be intercepted and conveyed to a stabilized discharge point downstream of the disturbed areas. Surface water collection measures shall be installed concurrently with or immediately following rough grading and shall be designed, constructed, and stabilized as needed to minimize erosion. Renton Senior Housing 10 of 11 Technical Information Report 7. Dewatering Control: The water resulting from construction site dewatering activities must be treated prior to discharge or disposed of as specified. 8. Dust Control: Preventative measures to minimize wind transport of soil shall be implemented when a traffic hazard may be created or when sediment transported by wind is likely to be deposited in water resources. 9. Flow Control: Surface water from disturbed areas must be routed through the project’s onsite flow control facility or other provisions must be made to prevent increases in the existing site conditions two- year and ten-year runoff peaks discharging from the project site during construction (flow control facility, runoff treatment facility, and on-site BMP areas [existing or proposed] shall not be used for this purpose). 10. Control Pollutants: Stormwater pollution prevention (SWPPS) measures are required to prevent, reduce, or eliminate the discharge of pollutants to onsite or adjacent stormwater systems or watercourses from construction-related activities such as materials delivery and storage, on-site equipment fueling and maintenance, demolition of existing buildings and disposition of demolition materials and other waste, and concrete handling, washout and disposal. Section D.2.2 of the Manual describes BMPs specific to this purpose; additionally, several of the ESC BMPs described herein are applicable. 11. Protect Existing and Proposed Stormwater Facilities and On-site BMPs: Sedimentation and soil compaction reduce the infiltration capacity of native and engineered soils. Protection measures shall be applied/installed and maintained so as to prevent adverse impacts to existing stormwater facilities and on-site BMPs and areas of proposed stormwater facilities and on-site BMPs for the project. Adverse impacts can prompt the requirement to restore or replace affected stormwater facilities and on-site BMPs. 12. Maintain Protective BMPs: Protection measures shall be maintained to ensure continued performance of their intended function, to prevent adverse impacts to existing BMPs/facilities and areas of proposed BMPs/facilities, and protect other disturbed areas of the project. 13. Manage the Project: Coordination and timing of site development activities relative to ESC concerns and timely inspection, maintenance, and update of protective measures are necessary to effectively manage the project and ensure the success of protective ESC and SWPPS design and implementation. See Appendix D of the Manual for further discussion of Erosion and Sediment Control. The steep slopes on site will remain undisturbed. Where retaining walls are constructed, footing drains will be installed to help reduce erosion problems. 8.2 SWPPS PLAN DESIGN A site-specific Construction Stormwater Pollution Prevention Plan is enclosed herein as Appendix H. Renton Senior Housing 11 of 11 Technical Information Report 9. BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT A Bond Quantities Worksheet, facility summaries, and declaration of covenant(s) for privately maintained flow control facilities is enclosed herein as Appendix H. 10. OPERATIONS AND MAINTENANCE MANUAL A site-specific Operations and Maintenance Manual is enclosed herein as Appendix J. APPENDIX A DETERMINATION OF MINIMUM REQUIREMENTS WORKSHEETS APPENDIX B SITE VICINITY MAP APPENDIX C BASIN MAP EXHIBITS TALBOT ROAD S.PROPOSED STORMWATER BASINEXISTING STORMWATER BASINSP-01W, HOLM2SCALE IN FEET03060SEC. 31, T23N., R5E., W.M.JOB NO:DRAWING FILE NO:DATE:DESIGNER:BYDATEREVISIONSDRAWN BY:SHEET TITLE:OFDRAWING NO:SHEET NO:PROJECT NAME:SEAL:APPROVED BY:RENTON SENIOR HOUSINGRENTON, WAK. MELVINR. JARVISNOVEMBER, 20172386.0328730 TALLON LANE NE, SUITE 200, LACEY, WA 98516P: 360-352-1465 F: 360-352-1509SCJALLIANCE.COMCALL BEFORE YOU DIGSITE INFORMATION TALBOT ROAD S.TALBOT ROAD SECCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCPROPOSED STORMWATER BASINPROPOSED STORMWATER BASINSP-01M. DOBBS2SCALE IN FEET03060SEC. 31, T23N., R5E., W.M.JOB NO:DRAWING FILE NO:DATE:DESIGNER:BYDATEREVISIONSDRAWN BY:SHEET TITLE:OFDRAWING NO:SHEET NO:PROJECT NAME:SEAL:APPROVED BY:RENTON SENIOR HOUSINGRENTON, WAK. MELVINR. JARVISMAY, 20182386.0328730 TALLON LANE NE, SUITE 200, LACEY, WA 98516P: 360-352-1465 F: 360-352-1509SCJALLIANCE.COMCALL BEFORE YOU DIGSITE INFORMATION APPENDIX D OFF-SITE ANALYSIS APPENDIX E DESIGN CALCULATIONS AND COMPUTATIONS WWHM2012 PROJECT REPORT 2386.03 Renton 5/15/2018 12:06:05 PM Page 2 General Model Information Project Name:2386.03 Renton Site Name: Site Address: City: Report Date:5/15/2018 Gage:Seatac Data Start:1948/10/01 Data End:2009/09/30 Timestep:15 Minute Precip Scale:1.000 Version Date:2016/11/23 Version:4.2.13 POC Thresholds Low Flow Threshold for POC1:50 Percent of the 2 Year High Flow Threshold for POC1:50 Year 2386.03 Renton 5/15/2018 12:06:05 PM Page 3 Landuse Basin Data Predeveloped Land Use Basin 1 Bypass:No GroundWater:No Pervious Land Use acre C, Forest, Mod 4.75 Pervious Total 4.75 Impervious Land Use acre Impervious Total 0 Basin Total 4.75 Element Flows To: Surface Interflow Groundwater 2386.03 Renton 5/15/2018 12:06:05 PM Page 4 Mitigated Land Use Basin 1 Bypass:No GroundWater:No Pervious Land Use acre C, Forest, Steep 1 C, Lawn, Mod 0.98 Pervious Total 1.98 Impervious Land Use acre ROADS MOD 1.29 ROOF TOPS FLAT 1.03 SIDEWALKS MOD 0.45 Impervious Total 2.77 Basin Total 4.75 Element Flows To: Surface Interflow Groundwater Storm Capture 1 Storm Capture 1 2386.03 Renton 5/15/2018 12:06:05 PM Page 6 Mitigated Routing Storm Capture 1 Dimensions Depth:7 ft. Length:1395 ft. Width:7 ft. Discharge Structure Riser Height:6 ft. Riser Diameter:18 in. Orifice 1 Diameter:1.2 in.Elevation:0 ft. Orifice 2 Diameter:1.9 in.Elevation:4 ft. Orifice 3 Diameter:1.2 in.Elevation:4.5 ft. Element Flows To: Outlet 1 Outlet 2 SCapture Hydraulic Table Stage(feet)Area(ac.)Volume(ac-ft.)Discharge(cfs)Infilt(cfs) 0.0000 0.224 0.000 0.000 0.000 0.0778 0.224 0.017 0.010 0.000 0.1556 0.224 0.034 0.015 0.000 0.2333 0.224 0.052 0.018 0.000 0.3111 0.224 0.069 0.021 0.000 0.3889 0.224 0.087 0.024 0.000 0.4667 0.224 0.104 0.026 0.000 0.5444 0.224 0.122 0.028 0.000 0.6222 0.224 0.139 0.030 0.000 0.7000 0.224 0.156 0.032 0.000 0.7778 0.224 0.174 0.034 0.000 0.8556 0.224 0.191 0.036 0.000 0.9333 0.224 0.209 0.037 0.000 1.0111 0.224 0.226 0.039 0.000 1.0889 0.224 0.244 0.040 0.000 1.1667 0.224 0.261 0.042 0.000 1.2444 0.224 0.279 0.043 0.000 1.3222 0.224 0.296 0.044 0.000 1.4000 0.224 0.313 0.046 0.000 1.4778 0.224 0.331 0.047 0.000 1.5556 0.224 0.348 0.048 0.000 1.6333 0.224 0.366 0.049 0.000 1.7111 0.224 0.383 0.051 0.000 1.7889 0.224 0.401 0.052 0.000 1.8667 0.224 0.418 0.053 0.000 1.9444 0.224 0.435 0.054 0.000 2.0222 0.224 0.453 0.055 0.000 2.1000 0.224 0.470 0.056 0.000 2.1778 0.224 0.488 0.057 0.000 2.2556 0.224 0.505 0.058 0.000 2.3333 0.224 0.523 0.059 0.000 2.4111 0.224 0.540 0.060 0.000 2.4889 0.224 0.557 0.061 0.000 2.5667 0.224 0.575 0.062 0.000 2.6444 0.224 0.592 0.063 0.000 2.7222 0.224 0.610 0.064 0.000 2.8000 0.224 0.627 0.065 0.000 2386.03 Renton 5/15/2018 12:06:05 PM Page 7 2.8778 0.224 0.645 0.066 0.000 2.9556 0.224 0.662 0.067 0.000 3.0333 0.224 0.680 0.068 0.000 3.1111 0.224 0.697 0.068 0.000 3.1889 0.224 0.714 0.069 0.000 3.2667 0.224 0.732 0.070 0.000 3.3444 0.224 0.749 0.071 0.000 3.4222 0.224 0.767 0.072 0.000 3.5000 0.224 0.784 0.073 0.000 3.5778 0.224 0.802 0.073 0.000 3.6556 0.224 0.819 0.074 0.000 3.7333 0.224 0.836 0.075 0.000 3.8111 0.224 0.854 0.076 0.000 3.8889 0.224 0.871 0.077 0.000 3.9667 0.224 0.889 0.077 0.000 4.0444 0.224 0.906 0.099 0.000 4.1222 0.224 0.924 0.113 0.000 4.2000 0.224 0.941 0.123 0.000 4.2778 0.224 0.959 0.132 0.000 4.3556 0.224 0.976 0.140 0.000 4.4333 0.224 0.993 0.146 0.000 4.5111 0.224 1.011 0.157 0.000 4.5889 0.224 1.028 0.170 0.000 4.6667 0.224 1.046 0.180 0.000 4.7444 0.224 1.063 0.189 0.000 4.8222 0.224 1.081 0.196 0.000 4.9000 0.224 1.098 0.204 0.000 4.9778 0.224 1.115 0.211 0.000 5.0556 0.224 1.133 0.217 0.000 5.1333 0.224 1.150 0.223 0.000 5.2111 0.224 1.168 0.230 0.000 5.2889 0.224 1.185 0.235 0.000 5.3667 0.224 1.203 0.241 0.000 5.4444 0.224 1.220 0.246 0.000 5.5222 0.224 1.237 0.252 0.000 5.6000 0.224 1.255 0.257 0.000 5.6778 0.224 1.272 0.262 0.000 5.7556 0.224 1.290 0.267 0.000 5.8333 0.224 1.307 0.272 0.000 5.9111 0.224 1.325 0.276 0.000 5.9889 0.224 1.342 0.281 0.000 6.0667 0.224 1.360 0.559 0.000 6.1444 0.224 1.377 1.159 0.000 6.2222 0.224 1.394 1.931 0.000 6.3000 0.224 1.412 2.800 0.000 6.3778 0.224 1.429 3.689 0.000 6.4556 0.224 1.447 4.523 0.000 6.5333 0.224 1.464 5.235 0.000 6.6111 0.224 1.482 5.783 0.000 6.6889 0.224 1.499 6.168 0.000 6.7667 0.224 1.516 6.528 0.000 6.8444 0.224 1.534 6.839 0.000 6.9222 0.224 1.551 7.136 0.000 7.0000 0.224 1.569 7.421 0.000 2386.03 Renton 5/15/2018 12:06:05 PM Page 8 Analysis Results POC 1 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #1 Total Pervious Area:4.75 Total Impervious Area:0 Mitigated Landuse Totals for POC #1 Total Pervious Area:1.98 Total Impervious Area:2.77 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.141432 5 year 0.231749 10 year 0.289821 25 year 0.358901 50 year 0.406749 100 year 0.451443 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0.085757 5 year 0.138593 10 year 0.183832 25 year 0.254677 50 year 0.318766 100 year 0.393792 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1949 0.163 0.061 1950 0.193 0.076 1951 0.309 0.256 1952 0.097 0.055 1953 0.078 0.066 1954 0.120 0.069 1955 0.192 0.068 1956 0.155 0.128 1957 0.125 0.068 1958 0.139 0.072 2386.03 Renton 5/15/2018 12:06:33 PM Page 9 1959 0.119 0.062 1960 0.213 0.210 1961 0.117 0.075 1962 0.073 0.052 1963 0.100 0.069 1964 0.142 0.071 1965 0.094 0.104 1966 0.091 0.065 1967 0.217 0.072 1968 0.122 0.067 1969 0.119 0.064 1970 0.095 0.068 1971 0.108 0.071 1972 0.235 0.207 1973 0.104 0.109 1974 0.115 0.072 1975 0.160 0.065 1976 0.115 0.069 1977 0.017 0.055 1978 0.097 0.074 1979 0.059 0.051 1980 0.276 0.215 1981 0.087 0.068 1982 0.179 0.137 1983 0.153 0.071 1984 0.092 0.057 1985 0.055 0.058 1986 0.242 0.096 1987 0.214 0.184 1988 0.084 0.058 1989 0.056 0.056 1990 0.512 0.220 1991 0.272 0.205 1992 0.111 0.075 1993 0.108 0.057 1994 0.036 0.049 1995 0.155 0.076 1996 0.359 0.252 1997 0.277 0.233 1998 0.068 0.057 1999 0.303 0.188 2000 0.108 0.071 2001 0.019 0.047 2002 0.125 0.099 2003 0.187 0.063 2004 0.199 0.236 2005 0.148 0.070 2006 0.166 0.112 2007 0.387 0.340 2008 0.472 0.243 2009 0.220 0.118 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.5121 0.3396 2 0.4719 0.2559 3 0.3871 0.2522 2386.03 Renton 5/15/2018 12:06:33 PM Page 10 4 0.3587 0.2430 5 0.3090 0.2362 6 0.3035 0.2333 7 0.2768 0.2196 8 0.2762 0.2147 9 0.2716 0.2101 10 0.2424 0.2066 11 0.2346 0.2050 12 0.2200 0.1877 13 0.2172 0.1841 14 0.2139 0.1371 15 0.2132 0.1279 16 0.1994 0.1180 17 0.1932 0.1116 18 0.1922 0.1091 19 0.1866 0.1043 20 0.1791 0.0990 21 0.1664 0.0961 22 0.1628 0.0762 23 0.1604 0.0759 24 0.1552 0.0746 25 0.1549 0.0746 26 0.1532 0.0736 27 0.1480 0.0725 28 0.1421 0.0724 29 0.1388 0.0718 30 0.1250 0.0711 31 0.1250 0.0710 32 0.1222 0.0708 33 0.1203 0.0707 34 0.1190 0.0699 35 0.1190 0.0694 36 0.1173 0.0691 37 0.1152 0.0687 38 0.1146 0.0682 39 0.1109 0.0681 40 0.1083 0.0680 41 0.1078 0.0675 42 0.1078 0.0666 43 0.1040 0.0663 44 0.1002 0.0648 45 0.0970 0.0646 46 0.0969 0.0640 47 0.0955 0.0627 48 0.0944 0.0616 49 0.0923 0.0609 50 0.0907 0.0580 51 0.0867 0.0579 52 0.0845 0.0574 53 0.0784 0.0569 54 0.0730 0.0568 55 0.0677 0.0564 56 0.0586 0.0553 57 0.0559 0.0545 58 0.0548 0.0524 59 0.0364 0.0513 60 0.0194 0.0493 61 0.0168 0.0471 2386.03 Renton 5/15/2018 12:06:33 PM Page 12 Duration Flows The Facility PASSED Flow(cfs)Predev Mit Percentage Pass/Fail 0.0707 17477 15447 88 Pass 0.0741 15524 9563 61 Pass 0.0775 14264 6132 42 Pass 0.0809 13107 4894 37 Pass 0.0843 11668 4646 39 Pass 0.0877 10705 4490 41 Pass 0.0911 9589 4282 44 Pass 0.0945 8864 4156 46 Pass 0.0979 8226 4023 48 Pass 0.1013 7394 3859 52 Pass 0.1047 6857 3713 54 Pass 0.1081 6192 3542 57 Pass 0.1114 5788 3420 59 Pass 0.1148 5405 3281 60 Pass 0.1182 4943 3101 62 Pass 0.1216 4635 3001 64 Pass 0.1250 4237 2851 67 Pass 0.1284 3978 2710 68 Pass 0.1318 3720 2586 69 Pass 0.1352 3403 2387 70 Pass 0.1386 3178 2254 70 Pass 0.1420 2982 2152 72 Pass 0.1454 2725 2009 73 Pass 0.1488 2526 1931 76 Pass 0.1522 2327 1840 79 Pass 0.1556 2165 1761 81 Pass 0.1590 2019 1696 84 Pass 0.1624 1839 1628 88 Pass 0.1658 1731 1582 91 Pass 0.1691 1581 1521 96 Pass 0.1725 1460 1463 100 Pass 0.1759 1352 1391 102 Pass 0.1793 1243 1308 105 Pass 0.1827 1167 1235 105 Pass 0.1861 1086 1154 106 Pass 0.1895 1026 1094 106 Pass 0.1929 973 1031 105 Pass 0.1963 890 938 105 Pass 0.1997 840 890 105 Pass 0.2031 763 800 104 Pass 0.2065 727 733 100 Pass 0.2099 685 665 97 Pass 0.2133 629 581 92 Pass 0.2167 596 533 89 Pass 0.2201 549 459 83 Pass 0.2235 509 421 82 Pass 0.2269 476 386 81 Pass 0.2302 429 330 76 Pass 0.2336 391 293 74 Pass 0.2370 356 227 63 Pass 0.2404 329 198 60 Pass 0.2438 305 165 54 Pass 0.2472 272 147 54 Pass 2386.03 Renton 5/15/2018 12:06:33 PM Page 13 0.2506 246 126 51 Pass 0.2540 218 95 43 Pass 0.2574 200 79 39 Pass 0.2608 179 68 37 Pass 0.2642 153 60 39 Pass 0.2676 133 53 39 Pass 0.2710 122 47 38 Pass 0.2744 106 38 35 Pass 0.2778 97 33 34 Pass 0.2812 84 14 16 Pass 0.2846 77 10 12 Pass 0.2879 69 8 11 Pass 0.2913 61 8 13 Pass 0.2947 54 8 14 Pass 0.2981 46 8 17 Pass 0.3015 41 8 19 Pass 0.3049 32 6 18 Pass 0.3083 25 6 24 Pass 0.3117 22 6 27 Pass 0.3151 20 5 25 Pass 0.3185 18 4 22 Pass 0.3219 14 4 28 Pass 0.3253 12 3 25 Pass 0.3287 10 2 20 Pass 0.3321 7 2 28 Pass 0.3355 7 1 14 Pass 0.3389 7 1 14 Pass 0.3423 6 0 0 Pass 0.3457 6 0 0 Pass 0.3490 6 0 0 Pass 0.3524 6 0 0 Pass 0.3558 6 0 0 Pass 0.3592 5 0 0 Pass 0.3626 5 0 0 Pass 0.3660 5 0 0 Pass 0.3694 5 0 0 Pass 0.3728 5 0 0 Pass 0.3762 5 0 0 Pass 0.3796 5 0 0 Pass 0.3830 5 0 0 Pass 0.3864 4 0 0 Pass 0.3898 3 0 0 Pass 0.3932 3 0 0 Pass 0.3966 3 0 0 Pass 0.4000 3 0 0 Pass 0.4034 3 0 0 Pass 0.4067 3 0 0 Pass 2386.03 Renton 5/15/2018 12:06:33 PM Page 14 Water Quality Water Quality BMP Flow and Volume for POC #1 On-line facility volume:0 acre-feet On-line facility target flow:0 cfs. Adjusted for 15 min:0 cfs. Off-line facility target flow:0 cfs. Adjusted for 15 min:0 cfs. 2386.03 Renton 5/15/2018 12:06:33 PM Page 15 LID Report 2386.03 Renton 5/15/2018 12:06:41 PM Page 16 Model Default Modifications Total of 0 changes have been made. PERLND Changes No PERLND changes have been made. IMPLND Changes No IMPLND changes have been made. 2386.03 Renton 5/15/2018 12:06:41 PM Page 17 Appendix Predeveloped Schematic 2386.03 Renton 5/15/2018 12:06:41 PM Page 18 Mitigated Schematic 2386.03 Renton 5/15/2018 12:06:41 PM Page 31 Disclaimer Legal Notice This program and accompanying documentation are provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by End User. Clear Creek Solutions Inc. and the governmental licensee or sublicensees disclaim all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall Clear Creek Solutions Inc. be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the use of, or inability to use this program even if Clear Creek Solutions Inc. or their authorized representatives have been advised of the possibility of such damages. Software Copyright © by : Clear Creek Solutions, Inc. 2005-2018; All Rights Reserved. Clear Creek Solutions, Inc. 6200 Capitol Blvd. Ste F Olympia, WA. 98501 Toll Free 1(866)943-0304 Local (360)943-0304 www.clearcreeksolutions.com Renton Senior housing WWHM Modeling For Treatment APPENDIX F STORMWATER PLAN SHEETS APPENDIX G GEOTECHNICAL REPORT EarthSolutionsNWLLC EarthSolutions NW LLC Geotechnical Engineering Geology Environmental Scientists Construction Monitoring 1805 -136th Place N.E.,Suite 201 Bellevue,WA 98005 (425)449-4704 Fax (425)449-4711 www.earthsolutionsnw.com GEOTECHNICAL ENGINEERING STUDY PROPOSED COMMERCIAL DEVELOPMENT TALBOT ROAD SOUTH AND SOUTH 45th PLACE RENTON,WASHINGTON ES-0895.03 Drwn.CAM Checked CGH Date July 2017 Date 07/20/2017 Proj.No.0895.03 Plate 1 Earth Solutions NWLLC Geotechnical Engineering,Construction Monitoring EarthSolutionsNWLLC EarthSolutions NW LLC and Environmental Sciences Vicinity Map Talbot Commercial Renton,Washington Reference: King County,Washington Map 686 By The Thomas Guide Rand McNally 32nd Edition NORTH NOTE:This plate may contain areas of color.ESNW cannot be responsible for any subsequent misinterpretation of the information resulting from black &white reproductions of this plate. SITE Plate Proj.No. Date Checked By Drwn.ByEarthSolutionsNWLLCGeotechnicalEngineering,ConstructionMonitoringandEnvironmentalSciencesEarthSolutionsNWLLCEarthSolutionsNWLLCtalbotrd.s.160 160 170 170 180 180 190 200 210 220 230 240 240230220210200190 TP-1 TP-2 TP-3 TP-4TP-5 TP-6 TP-1 TP-2 TP-3 TP-4 TP-5 NOTE:This plate may contain areas of color.ESNW cannot be responsible for any subsequent misinterpretation of the information resulting from black &white reproductions of this plate. NOTE:The graphics shown on this plate are not intended for design purposes or precise scale measurements,but only to illustrate the approximate test locations relative to the approximate locations of existing and /or proposed site features.The information illustrated is largely based on data provided by the client at the time of our study.ESNW cannot be responsible for subsequent design changes or interpretation of the data by others. LEGEND Approximate Location of ESNW Test Pit,Proj.No. ES-0895,May 2007 Approximate Location of ESNW Test Pit,Proj.No. ES-0690,Nov.2006 Subject Site TP-1 NORTH 0 4 0 8 0 1 6 0 Scale in Feet1"=8 0 ' TP-1 CAM CGH 07/20/2017 0895.03 2TestPitLocationPlanTalbotCommercial Renton,Washington Drwn.CAM Checked CGH Date July 2017 Date 07/20/2017 Proj.No.0895.03 Plate 3 Earth Solutions NWLLC Geotechnical Engineering,Construction Monitoring and Environmental Sciences EarthSolutionsNWLLC EarthSolutions NW LLC RETAINING WALL DRAINAGE DETAIL Talbot Commercial Renton,Washington NOTES: Free Draining Backfill should consist of soil having less than 5 percent fines. Percent passing #4 should be 25 to 75 percent. Sheet Drain may be feasible in lieu of Free Draining Backfill,per ESNW recommendations. Drain Pipe should consist of perforated, rigid PVC Pipe surrounded with 1" Drain Rock. LEGEND: Free Draining Structural Backfill 1 inch Drain Rock 18"Min. Structural Fill Perforated Drain Pipe (Surround In Drain Rock) SCHEMATIC ONLY -NOT TO SCALE NOT A CONSTRUCTION DRAWING Drwn.CAM Checked CGH Date July 2017 Date 07/20/2017 Proj.No.0895.03 Plate 4 Earth Solutions NWLLC Geotechnical Engineering,Construction Monitoring and Environmental Sciences EarthSolutionsNWLLC EarthSolutions NW LLC FOOTING DRAIN DETAIL Talbot Commercial Renton,Washington Slope Perforated Rigid Drain Pipe (Surround with 1"Rock) 18"(Min.) NOTES: Do NOT tie roof downspouts to Footing Drain. Surface Seal to consist of 12"of less permeable,suitable soil.Slope away from building. LEGEND: Surface Seal;native soil or other low permeability material. 1"Drain Rock SCHEMATIC ONLY -NOT TO SCALE NOT A CONSTRUCTION DRAW ING APPENDIX H CONSTRUCTION SWPPP APPENDIX I WORKSHEETS CED Permit #:########UnitReference #PriceUnitQuantity CostBackfill & compaction-embankmentESC-16.50$ CY Check dams, 4" minus rockESC-2SWDM 5.4.6.380.00$ Each Catch Basin ProtectionESC-335.50$ Each16568.00Crushed surfacing 1 1/4" minusESC-4WSDOT 9-03.9(3)95.00$ CY DitchingESC-59.00$ CY Excavation-bulkESC-62.00$ CY Fence, siltESC-7SWDM 5.4.3.11.50$ LF16802,520.00Fence, Temporary (NGPE)ESC-81.50$ LF Geotextile FabricESC-92.50$ SY25006,250.00Hay Bale Silt TrapESC-100.50$ Each HydroseedingESC-11SWDM 5.4.2.40.80$ SY46003,680.00Interceptor Swale / DikeESC-121.00$ LF Jute MeshESC-13SWDM 5.4.2.23.50$ SY Level SpreaderESC-141.75$ LF Mulch, by hand, straw, 3" deepESC-15SWDM 5.4.2.12.50$ SY Mulch, by machine, straw, 2" deepESC-16SWDM 5.4.2.12.00$ SY Piping, temporary, CPP, 6"ESC-1712.00$ LF Piping, temporary, CPP, 8"ESC-1814.00$ LF Piping, temporary, CPP, 12"ESC-1918.00$ LF Plastic covering, 6mm thick, sandbaggedESC-20SWDM 5.4.2.34.00$ SY Rip Rap, machine placed; slopesESC-21WSDOT 9-13.1(2)45.00$ CY Rock Construction Entrance, 50'x15'x1'ESC-22SWDM 5.4.4.11,800.00$ Each Rock Construction Entrance, 100'x15'x1'ESC-23SWDM 5.4.4.13,200.00$ Each13,200.00Sediment pond riser assemblyESC-24SWDM 5.4.5.22,200.00$ Each Sediment trap, 5' high berm ESC-25SWDM 5.4.5.119.00$ LF Sed. trap, 5' high, riprapped spillway berm section ESC-26SWDM 5.4.5.170.00$ LF Seeding, by handESC-27SWDM 5.4.2.41.00$ SY Sodding, 1" deep, level groundESC-28SWDM 5.4.2.58.00$ SY Sodding, 1" deep, sloped groundESC-29SWDM 5.4.2.510.00$ SY TESC SupervisorESC-30110.00$ HR Water truck, dust controlESC-31SWDM 5.4.7140.00$ HR UnitReference #PriceUnitQuantity Cost EROSION/SEDIMENT SUBTOTAL:16,218.00SALES TAX @ 10%1,621.80EROSION/SEDIMENT TOTAL:17,839.80(A)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR EROSION & SEDIMENT CONTROLDescription No.(A)WRITE-IN-ITEMS Page 3 of 14Ref 8-H Bond Quantity WorksheetSECTION II.a EROSION_CONTROLUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 12/20/2017 CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostGENERAL ITEMS Backfill & Compaction- embankmentGI-16.00$ CYBackfill & Compaction- trenchGI-29.00$ CYClear/Remove Brush, by hand (SY)GI-31.00$ SYBollards - fixedGI-4240.74$ EachBollards - removableGI-5452.34$ EachClearing/Grubbing/Tree RemovalGI-610,000.00$ AcreExcavation - bulkGI-72.00$ CYExcavation - TrenchGI-85.00$ CYFencing, cedar, 6' highGI-920.00$ LFFencing, chain link, 4'GI-1038.31$ LFFencing, chain link, vinyl coated, 6' highGI-1120.00$ LFFencing, chain link, gate, vinyl coated, 20' GI-121,400.00$ EachFill & compact - common barrowGI-1325.00$ CYFill & compact - gravel baseGI-1427.00$ CYFill & compact - screened topsoilGI-1539.00$ CYGabion, 12" deep, stone filled mesh GI-1665.00$ SYGabion, 18" deep, stone filled mesh GI-1790.00$ SYGabion, 36" deep, stone filled meshGI-18150.00$ SYGrading, fine, by handGI-192.50$ SYGrading, fine, with graderGI-202.00$ SYMonuments, 3' LongGI-21250.00$ EachSensitive Areas SignGI-227.00$ EachSodding, 1" deep, sloped groundGI-238.00$ SYSurveying, line & gradeGI-24850.00$ DaySurveying, lot location/linesGI-251,800.00$ AcreTopsoil Type A (imported)GI-2628.50$ CYTraffic control crew ( 2 flaggers )GI-27120.00$ HRTrail, 4" chipped woodGI-288.00$ SYTrail, 4" crushed cinderGI-299.00$ SYTrail, 4" top courseGI-3012.00$ SYConduit, 2"GI-315.00$ LFWall, retaining, concreteGI-3255.00$ SFWall, rockeryGI-3315.00$ SFSUBTOTAL THIS PAGE:(B)(C)(D)(E)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR STREET AND SITE IMPROVEMENTSQuantity Remaining (Bond Reduction) (B)(C)Page 4 of 14Ref 8-H Bond Quantity WorksheetSECTION II.b TRANSPORTATIONUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 12/20/2017 CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostSITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR STREET AND SITE IMPROVEMENTSQuantity Remaining (Bond Reduction) (B)(C)ROAD IMPROVEMENT/PAVEMENT/SURFACINGAC Grinding, 4' wide machine < 1000syRI-130.00$ SYAC Grinding, 4' wide machine 1000-2000syRI-216.00$ SYAC Grinding, 4' wide machine > 2000syRI-310.00$ SYAC Removal/DisposalRI-435.00$ SYBarricade, Type III ( Permanent )RI-556.00$ LFGuard RailRI-630.00$ LFCurb & Gutter, rolledRI-717.00$ LFCurb & Gutter, verticalRI-812.50$ LFCurb and Gutter, demolition and disposalRI-918.00$ LFCurb, extruded asphaltRI-105.50$ LFCurb, extruded concreteRI-117.00$ LFSawcut, asphalt, 3" depthRI-121.85$ LFSawcut, concrete, per 1" depthRI-133.00$ LFSealant, asphaltRI-142.00$ LFShoulder, gravel, 4" thickRI-1515.00$ SYSidewalk, 4" thickRI-1638.00$ SYSidewalk, 4" thick, demolition and disposalRI-1732.00$ SYSidewalk, 5" thickRI-1841.00$ SYSidewalk, 5" thick, demolition and disposalRI-1940.00$ SYSign, Handicap RI-2085.00$ EachStriping, per stallRI-217.00$ EachStriping, thermoplastic, ( for crosswalk )RI-223.00$ SFStriping, 4" reflectorized lineRI-230.50$ LFAdditional 2.5" Crushed SurfacingRI-243.60$ SYHMA 1/2" Overlay 1.5" RI-2514.00$ SYHMA 1/2" Overlay 2"RI-2618.00$ SYHMA Road, 2", 4" rock, First 2500 SYRI-2728.00$ SYHMA Road, 2", 4" rock, Qty. over 2500SYRI-2821.00$ SYHMA Road, 4", 6" rock, First 2500 SYRI-2945.00$ SYHMA Road, 4", 6" rock, Qty. over 2500 SYRI-3037.00$ SYHMA Road, 4", 4.5" ATBRI-3138.00$ SYGravel Road, 4" rock, First 2500 SYRI-3215.00$ SYGravel Road, 4" rock, Qty. over 2500 SYRI-3310.00$ SYThickened EdgeRI-348.60$ LFSUBTOTAL THIS PAGE:(B)(C)(D)(E)Page 5 of 14Ref 8-H Bond Quantity WorksheetSECTION II.b TRANSPORTATIONUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 12/20/2017 CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostSITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR STREET AND SITE IMPROVEMENTSQuantity Remaining (Bond Reduction) (B)(C)PARKING LOT SURFACINGNo.2" AC, 2" top course rock & 4" borrowPL-121.00$ SY2" AC, 1.5" top course & 2.5" base coursePL-228.00$ SY852,380.001764,928.005555155,540.004" select borrowPL-35.00$ SY1.5" top course rock & 2.5" base coursePL-414.00$ SYSUBTOTAL PARKING LOT SURFACING:2,380.004,928.00155,540.00(B)(C)(D)(E)LANDSCAPING & VEGETATIONNo.Street TreesLA-1Median LandscapingLA-2Right-of-Way LandscapingLA-3Wetland LandscapingLA-4SUBTOTAL LANDSCAPING & VEGETATION:(B)(C)(D)(E)TRAFFIC & LIGHTINGNo.SignsTR-1Street Light System ( # of Poles)TR-2Traffic SignalTR-3Traffic Signal ModificationTR-4SUBTOTAL TRAFFIC & LIGHTING:(B)(C)(D)(E)WRITE-IN-ITEMSSUBTOTAL WRITE-IN ITEMS:STREET AND SITE IMPROVEMENTS SUBTOTAL:2,380.004,928.00155,540.00SALES TAX @ 10%238.00492.8015,554.00STREET AND SITE IMPROVEMENTS TOTAL:2,618.005,420.80171,094.00(B)(C)(D)(E)Page 6 of 14Ref 8-H Bond Quantity WorksheetSECTION II.b TRANSPORTATIONUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 12/20/2017 CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostDRAINAGE (CPE = Corrugated Polyethylene Pipe, N12 or Equivalent) For Culvert prices, Average of 4' cover was assumed. Assume perforated PVC is same price as solid pipe.) Access Road, R/DD-126.00$ SY* (CBs include frame and lid)BeehiveD-290.00$ EachThrough-curb Inlet FrameworkD-3400.00$ EachCB Type ID-41,500.00$ Each11,500.0011,500.001015,000.00CB Type ILD-51,750.00$ EachCB Type II, 48" diameterD-62,300.00$ Each for additional depth over 4' D-7480.00$ FTCB Type II, 54" diameterD-82,500.00$ Each for additional depth over 4'D-9495.00$ FTCB Type II, 60" diameterD-102,800.00$ Each for additional depth over 4'D-11600.00$ FTCB Type II, 72" diameterD-126,000.00$ Each for additional depth over 4'D-13850.00$ FTCB Type II, 96" diameterD-1414,000.00$ Each for additional depth over 4'D-15925.00$ FTTrash Rack, 12"D-16350.00$ EachTrash Rack, 15"D-17410.00$ EachTrash Rack, 18"D-18480.00$ EachTrash Rack, 21"D-19550.00$ EachCleanout, PVC, 4"D-20150.00$ EachCleanout, PVC, 6"D-21170.00$ EachCleanout, PVC, 8"D-22200.00$ EachCulvert, PVC, 4" D-2310.00$ LFCulvert, PVC, 6" D-2413.00$ LFCulvert, PVC, 8" D-2515.00$ LFCulvert, PVC, 12" D-2623.00$ LF15345.0066015,180.00Culvert, PVC, 15" D-2735.00$ LFCulvert, PVC, 18" D-2841.00$ LFCulvert, PVC, 24"D-2956.00$ LFCulvert, PVC, 30" D-3078.00$ LFCulvert, PVC, 36" D-31130.00$ LFCulvert, CMP, 8"D-3219.00$ LFCulvert, CMP, 12"D-3329.00$ LFSUBTOTAL THIS PAGE:1,500.001,845.0030,180.00(B)(C)(D)(E)Quantity Remaining (Bond Reduction) (B)(C)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR DRAINAGE AND STORMWATER FACILITIESPage 7 of 14Ref 8-H Bond Quantity WorksheetSECTION II.c DRAINAGEUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 12/20/2017 CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostQuantity Remaining (Bond Reduction) (B)(C)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR DRAINAGE AND STORMWATER FACILITIESDRAINAGE (Continued)Culvert, CMP, 15"D-3435.00$ LFCulvert, CMP, 18"D-3541.00$ LFCulvert, CMP, 24"D-3656.00$ LFCulvert, CMP, 30"D-3778.00$ LFCulvert, CMP, 36"D-38130.00$ LFCulvert, CMP, 48"D-39190.00$ LFCulvert, CMP, 60"D-40270.00$ LFCulvert, CMP, 72"D-41350.00$ LFCulvert, Concrete, 8"D-4242.00$ LFCulvert, Concrete, 12"D-4348.00$ LFCulvert, Concrete, 15"D-4478.00$ LFCulvert, Concrete, 18"D-4548.00$ LFCulvert, Concrete, 24"D-4678.00$ LFCulvert, Concrete, 30"D-47125.00$ LFCulvert, Concrete, 36"D-48150.00$ LFCulvert, Concrete, 42"D-49175.00$ LFCulvert, Concrete, 48"D-50205.00$ LFCulvert, CPE Triple Wall, 6" D-5114.00$ LFCulvert, CPE Triple Wall, 8" D-5216.00$ LFCulvert, CPE Triple Wall, 12" D-5324.00$ LFCulvert, CPE Triple Wall, 15" D-5435.00$ LFCulvert, CPE Triple Wall, 18" D-5541.00$ LFCulvert, CPE Triple Wall, 24" D-5656.00$ LFCulvert, CPE Triple Wall, 30" D-5778.00$ LFCulvert, CPE Triple Wall, 36" D-58130.00$ LFCulvert, LCPE, 6"D-5960.00$ LFCulvert, LCPE, 8"D-6072.00$ LFCulvert, LCPE, 12"D-6184.00$ LFCulvert, LCPE, 15"D-6296.00$ LFCulvert, LCPE, 18"D-63108.00$ LFCulvert, LCPE, 24"D-64120.00$ LFCulvert, LCPE, 30"D-65132.00$ LFCulvert, LCPE, 36"D-66144.00$ LFCulvert, LCPE, 48"D-67156.00$ LFCulvert, LCPE, 54"D-68168.00$ LFSUBTOTAL THIS PAGE:(B)(C)(D)(E)Page 8 of 14Ref 8-H Bond Quantity WorksheetSECTION II.c DRAINAGEUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 12/20/2017 CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostQuantity Remaining (Bond Reduction) (B)(C)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR DRAINAGE AND STORMWATER FACILITIESDRAINAGE (Continued)Culvert, LCPE, 60"D-69180.00$ LFCulvert, LCPE, 72"D-70192.00$ LFCulvert, HDPE, 6"D-7142.00$ LFCulvert, HDPE, 8"D-7242.00$ LFCulvert, HDPE, 12"D-7374.00$ LF17012,580.00Culvert, HDPE, 15"D-74106.00$ LFCulvert, HDPE, 18"D-75138.00$ LFCulvert, HDPE, 24"D-76221.00$ LFCulvert, HDPE, 30"D-77276.00$ LFCulvert, HDPE, 36"D-78331.00$ LFCulvert, HDPE, 48"D-79386.00$ LFCulvert, HDPE, 54"D-80441.00$ LFCulvert, HDPE, 60"D-81496.00$ LFCulvert, HDPE, 72"D-82551.00$ LFPipe, Polypropylene, 6"D-8384.00$ LFPipe, Polypropylene, 8"D-8489.00$ LFPipe, Polypropylene, 12"D-8595.00$ LFPipe, Polypropylene, 15"D-86100.00$ LFPipe, Polypropylene, 18"D-87106.00$ LFPipe, Polypropylene, 24"D-88111.00$ LFPipe, Polypropylene, 30"D-89119.00$ LFPipe, Polypropylene, 36"D-90154.00$ LFPipe, Polypropylene, 48"D-91226.00$ LFPipe, Polypropylene, 54"D-92332.00$ LFPipe, Polypropylene, 60"D-93439.00$ LFPipe, Polypropylene, 72"D-94545.00$ LFCulvert, DI, 6"D-9561.00$ LFCulvert, DI, 8"D-9684.00$ LFCulvert, DI, 12"D-97106.00$ LFCulvert, DI, 15"D-98129.00$ LFCulvert, DI, 18"D-99152.00$ LFCulvert, DI, 24"D-100175.00$ LFCulvert, DI, 30"D-101198.00$ LFCulvert, DI, 36"D-102220.00$ LFCulvert, DI, 48"D-103243.00$ LFCulvert, DI, 54"D-104266.00$ LFCulvert, DI, 60"D-105289.00$ LFCulvert, DI, 72"D-106311.00$ LFSUBTOTAL THIS PAGE:12,580.00(B)(C)(D)(E)Page 9 of 14Ref 8-H Bond Quantity WorksheetSECTION II.c DRAINAGEUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 12/20/2017 CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostQuantity Remaining (Bond Reduction) (B)(C)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR DRAINAGE AND STORMWATER FACILITIESSpecialty Drainage ItemsDitching SD-19.50$ CYFlow Dispersal Trench (1,436 base+)SD-328.00$ LF French Drain (3' depth)SD-426.00$ LFGeotextile, laid in trench, polypropyleneSD-53.00$ SYMid-tank Access Riser, 48" dia, 6' deepSD-62,000.00$ Each12,000.00Pond Overflow SpillwaySD-716.00$ SYRestrictor/Oil Separator, 12"SD-81,150.00$ EachRestrictor/Oil Separator, 15"SD-91,350.00$ EachRestrictor/Oil Separator, 18"SD-101,700.00$ EachRiprap, placedSD-1142.00$ CYTank End Reducer (36" diameter)SD-121,200.00$ EachInfiltration pond testingSD-13125.00$ HRPermeable PavementSD-14Permeable Concrete SidewalkSD-15Culvert, Box __ ft x __ ftSD-16SUBTOTAL SPECIALTY DRAINAGE ITEMS:2,000.00(B)(C)(D)(E)STORMWATER FACILITIES (Include Flow Control and Water Quality Facility Summary Sheet and Sketch)Detention PondSF-1Each Detention TankSF-2Each Detention VaultSF-375,000.00$ Each 175,000.00Infiltration PondSF-4Each Infiltration TankSF-5Each Infiltration VaultSF-6Each Infiltration TrenchesSF-7Each Basic Biofiltration SwaleSF-8Each Wet Biofiltration SwaleSF-9Each WetpondSF-10Each WetvaultSF-11Each Sand FilterSF-12Each Sand Filter VaultSF-13Each Linear Sand FilterSF-14Each Proprietary FacilitySF-15Each Bioretention FacilitySF-16Each SUBTOTAL STORMWATER FACILITIES:75,000.00(B)(C)(D)(E)Page 10 of 14Ref 8-H Bond Quantity WorksheetSECTION II.c DRAINAGEUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 12/20/2017 CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostQuantity Remaining (Bond Reduction) (B)(C)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR DRAINAGE AND STORMWATER FACILITIESWRITE-IN-ITEMS (INCLUDE ON-SITE BMPs)WI-1WI-2WI-3WI-4WI-5WI-6WI-7WI-8WI-9WI-10WI-11WI-12WI-13WI-14WI-15SUBTOTAL WRITE-IN ITEMS:DRAINAGE AND STORMWATER FACILITIES SUBTOTAL:1,500.001,845.00119,760.00SALES TAX @ 10%150.00184.5011,976.00DRAINAGE AND STORMWATER FACILITIES TOTAL:1,650.002,029.50131,736.00(B) (C) (D) (E)Page 11 of 14Ref 8-H Bond Quantity WorksheetSECTION II.c DRAINAGEUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 12/20/2017 CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostConnection to Existing WatermainW-12,000.00$ Each24,000.00Ductile Iron Watermain, CL 52, 4 Inch DiameterW-250.00$ LFDuctile Iron Watermain, CL 52, 6 Inch DiameterW-356.00$ LFDuctile Iron Watermain, CL 52, 8 Inch DiameterW-460.00$ LF27516,500.00Ductile Iron Watermain, CL 52, 10 Inch DiameterW-570.00$ LF95066,500.00Ductile Iron Watermain, CL 52, 12 Inch DiameterW-680.00$ LFGate Valve, 4 inch DiameterW-7500.00$ EachGate Valve, 6 inch DiameterW-8700.00$ EachGate Valve, 8 Inch DiameterW-9800.00$ EachGate Valve, 10 Inch DiameterW-101,000.00$ Each33,000.00Gate Valve, 12 Inch DiameterW-111,200.00$ EachFire Hydrant AssemblyW-124,000.00$ Each520,000.00Permanent Blow-Off AssemblyW-131,800.00$ EachAir-Vac Assembly, 2-Inch DiameterW-142,000.00$ EachAir-Vac Assembly, 1-Inch DiameterW-151,500.00$ EachCompound Meter Assembly 3-inch DiameterW-168,000.00$ Each18,000.00Compound Meter Assembly 4-inch DiameterW-179,000.00$ EachCompound Meter Assembly 6-inch DiameterW-1810,000.00$ EachPressure Reducing Valve Station 8-inch to 10-inchW-1920,000.00$ Each120,000.00WATER SUBTOTAL:138,000.00SALES TAX @ 10%13,800.00WATER TOTAL:151,800.00(B) (C) (D) (E)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR WATERQuantity Remaining (Bond Reduction) (B)(C)Page 12 of 14Ref 8-H Bond Quantity WorksheetSECTION II.d WATERUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 12/20/2017 CED Permit #:########ExistingFuture PublicPrivateRight-of-WayImprovementsImprovements(D) (E)DescriptionNo. Unit PriceUnitQuant.CostQuant.CostQuant.CostQuant.CostClean OutsSS-11,000.00$ Each33,000.00Grease Interceptor, 500 gallonSS-28,000.00$ EachGrease Interceptor, 1000 gallonSS-310,000.00$ Each110,000.00Grease Interceptor, 1500 gallonSS-415,000.00$ EachSide Sewer Pipe, PVC. 4 Inch DiameterSS-580.00$ LFSide Sewer Pipe, PVC. 6 Inch DiameterSS-695.00$ LF15014,250.00Sewer Pipe, PVC, 8 inch DiameterSS-7105.00$ LF87591,875.00Sewer Pipe, PVC, 12 Inch DiameterSS-8120.00$ LFSewer Pipe, DI, 8 inch DiameterSS-9115.00$ LFSewer Pipe, DI, 12 Inch DiameterSS-10130.00$ LFManhole, 48 Inch DiameterSS-116,000.00$ Each424,000.00Manhole, 54 Inch DiameterSS-136,500.00$ EachManhole, 60 Inch DiameterSS-157,500.00$ EachManhole, 72 Inch DiameterSS-178,500.00$ EachManhole, 96 Inch DiameterSS-1914,000.00$ EachPipe, C-900, 12 Inch DiameterSS-21180.00$ LFOutside DropSS-241,500.00$ LSInside DropSS-251,000.00$ LSSewer Pipe, PVC, ____ Inch DiameterSS-26Lift Station (Entire System)SS-27LSSANITARY SEWER SUBTOTAL:143,125.00SALES TAX @ 10%14,312.50SANITARY SEWER TOTAL:157,437.50(B) (C) (D) (E)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR SANITARY SEWERQuantity Remaining (Bond Reduction) (B)(C)Page 13 of 14Ref 8-H Bond Quantity WorksheetSECTION II.e SANITARY SEWERUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 12/20/2017 Planning Division |1055 South Grady Way – 6th Floor | Renton, WA 98057 (425) 430-7200Date:Name:Project Name: PE Registration No:CED Plan # (LUA):Firm Name:CED Permit # (U):Firm Address:Site Address:Phone No.Parcel #(s):Email Address:Project Phase: Site Restoration/Erosion Sediment Control Subtotal (a)Existing Right-of-Way Improvements Subtotal (b)(b)2,618.00$ Future Public Improvements Subtotal(c)5,420.80$ Stormwater & Drainage Facilities (Public & Private) Subtotal(d)(d)135,415.50$ (e)(f)Site RestorationCivil Construction PermitMaintenance Bond28,690.86$ Bond Reduction2Construction Permit Bond Amount 3Minimum Bond Amount is $10,000.001 Estimate Only - May involve multiple and variable components, which will be established on an individual basis by Development Engineering.2 The City of Renton allows one request only for bond reduction prior to the maintenance period. Reduction of not more than 70% of the original bond amount, provided that the remaining 30% willcover all remaining items to be constructed. 3 Required Bond Amounts are subject to review and modification by Development Engineering.* Note: The word BOND as used in this document means any financial guarantee acceptable to the City of Renton.** Note: All prices include labor, equipment, materials, overhead and profit. EST1((b) + (c) + (d)) x 20%-$ MAINTENANCE BOND */**(after final acceptance of construction)17,839.80$ 2,618.00$ 139,342.50$ 17,839.80$ -$ 135,415.50$ -$ 157,182.30$ P (a) x 100%SITE IMPROVEMENT BOND QUANTITY WORKSHEET BOND CALCULATIONS12/20/2017Whitney Holm48811SCJ AllianceR((b x 150%) + (d x 100%))S(e) x 150% + (f) x 100%Bond Reduction: Existing Right-of-Way Improvements (Quantity Remaining)2Bond Reduction: Stormwater & Drainage Facilities (Quantity Remaining)2T(P +R - S)Prepared by:Project InformationCONSTRUCTION BOND AMOUNT */**(prior to permit issuance)360.352.1465whitney.holm@scjalliance.comRenton Senior Housing##-######(Unknown) XXX Talbot Road SE312305-9067, 312305-9094FOR APPROVAL########8730 Tallon Lane NE, Suite 200 Lacey WA 98516Page 14 of 14Ref 8-H Bond Quantity WorksheetSECTION III. BOND WORKSHEETUnit Prices Updated: 06/14/2016Version: 04/26/2017Printed 12/20/2017 APPENDIX J OPERATIONS AND MAINTENANCE MANUAL Renton Senior Housing Maintenance Plan Maintenance Program Cover Sheet Inspection Period: Number of Sheets Attached: Date Inspected: Inspector’s Signature: The following pages contain maintenance needs for most of the components that are part of your drainage system, as well as for some components that you may not have. Let the City know if there are any components that are missing from these pages. Ignore the requirements that do not apply to your system. You should plan to complete a checklist for all system components on the following schedule: (M) Monthly from October (or November) through April (A) Once in late summer (preferably September) (C) Once in mid summer (late July or early August) (S) After any major storm (use 1 inch in 24 hours as a guideline) (B) Biannually (twice per year - refer to individual checklist for timing) (Q) Quarterly Use photocopies of these pages and check off the problems you looked for each time you did an inspection. Add comments on problems found and actions taken. Keep these “checked" sheets in your files, as they will be used to write your annual report. Some items do not need to be looked at every time an inspection is done. The facility - specific maintenance standards contained in this section are intended to be conditions for determining if maintenance actions are required as identified through inspection. They are not intended to be measures of the facility's required condition at all times between inspections. In other words, exceedance of these conditions at any time between inspections and/or maintenance does not automatically constitute a violation of these standards. However, based upon inspection observations, the inspection and maintenance schedules shall be adjusted to minimize the length of time that a facility is in a condition that requires a maintenance action. A TESC certified professional will be designated prior to construction and will conduct inspections as well as identify a maintenance program for any erosion control measures. Renton Senior Housing Maintenance Plan Maintenance covenants shall include the maintenance standards specified by Appendix A in 2017 City of Renton Surface Water Design Manual. Included is a list of maintenance activities and proposed inspection intervals for each element of the private stormwater system, and a guarantee that any maintenance necessary for any element of the stormwater system will be performed to the standards specified by the Manual and within the following schedule: 1. Within one year for wet pool facilities and retention/detention ponds; 2. Within six months for typical maintenance; 3. Within nine months for maintenance requiring re-vegetation; 4. Within two years for maintenance that requires capital construction of less than $25,000. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 12/12/2016 2017 City of Renton Surface Water Design Manual A-6 NO. 3 – DETENTION TANKS AND VAULTS MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITIONS WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Site Trash and debris Any trash and debris which exceed 1 cubic foot per 1,000 square feet (this is about equal to the amount of trash it would take to fill up one standard size office garbage can). In general, there should be no visual evidence of dumping. Trash and debris cleared from site. Noxious weeds Any noxious or nuisance vegetation which may constitute a hazard to City personnel or the public. Noxious and nuisance vegetation removed according to applicable regulations. No danger of noxious vegetation where City personnel or the public might normally be. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Excessive growth of grass/groundcover Grass or groundcover exceeds 18 inches in height. Grass or groundcover mowed to a height no greater than 6 inches. Tank or Vault Storage Area Trash and debris Any trash and debris accumulated in vault or tank (includes floatables and non- floatables). No trash or debris in vault. Sediment accumulation Accumulated sediment depth exceeds 10% of the diameter of the storage area for ½ length of storage vault or any point depth exceeds 15% of diameter. Example: 72-inch storage tank would require cleaning when sediment reaches depth of 7 inches for more than ½ length of tank. All sediment removed from storage area. Tank Structure Plugged air vent Any blockage of the vent. Tank or vault freely vents. Tank bent out of shape Any part of tank/pipe is bent out of shape more than 10% of its design shape. Tank repaired or replaced to design. Gaps between sections, damaged joints or cracks or tears in wall A gap wider than ½-inch at the joint of any tank sections or any evidence of soil particles entering the tank at a joint or through a wall. No water or soil entering tank through joints or walls. Vault Structure Damage to wall, frame, bottom, and/or top slab Cracks wider than ½-inch, any evidence of soil entering the structure through cracks or qualified inspection personnel determines that the vault is not structurally sound. Vault is sealed and structurally sound. Inlet/Outlet Pipes Sediment accumulation Sediment filling 20% or more of the pipe. Inlet/outlet pipes clear of sediment. Trash and debris Trash and debris accumulated in inlet/outlet pipes (includes floatables and non-floatables). No trash or debris in pipes. Damaged inlet/outlet pipes Cracks wider than ½-inch at the joint of the inlet/outlet pipes or any evidence of soil entering at the joints of the inlet/outlet pipes. No cracks more than ¼-inch wide at the joint of the inlet/outlet pipe. Access Manhole Cover/lid not in place Cover/lid is missing or only partially in place. Any open manhole requires immediate maintenance. Manhole access covered. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 2017 City of Renton Surface Water Design Manual 12/12/2016 A-7 NO. 3 – DETENTION TANKS AND VAULTS MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITIONS WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Access Manhole (cont.) Locking mechanism not working Mechanism cannot be opened by one maintenance person with proper tools. Bolts cannot be seated. Self-locking cover/lid does not work. Mechanism opens with proper tools. Cover/lid difficult to remove One maintenance person cannot remove cover/lid after applying 80 lbs of lift. Cover/lid can be removed and reinstalled by one maintenance person. Ladder rungs unsafe Missing rungs, misalignment, rust, or cracks. Ladder meets design standards. Allows maintenance person safe access. Large access doors/plate Damaged or difficult to open Large access doors or plates cannot be opened/removed using normal equipment. Replace or repair access door so it can opened as designed. Gaps, doesn't cover completely Large access doors not flat and/or access opening not completely covered. Doors close flat; covers access opening completely. Lifting rings missing, rusted Lifting rings not capable of lifting weight of door or plate. Lifting rings sufficient to lift or remove door or plate. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 12/12/2016 2017 City of Renton Surface Water Design Manual A-8 NO. 4 – CONTROL STRUCTURE/FLOW RESTRICTOR MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITION WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Structure Trash and debris Trash or debris of more than ½ cubic foot which is located immediately in front of the structure opening or is blocking capacity of the structure by more than 10%. No Trash or debris blocking or potentially blocking entrance to structure. Trash or debris in the structure that exceeds 1/3 the depth from the bottom of basin to invert the lowest pipe into or out of the basin. No trash or debris in the structure. Deposits of garbage exceeding 1 cubic foot in volume. No condition present which would attract or support the breeding of insects or rodents. Sediment accumulation Sediment exceeds 60% of the depth from the bottom of the structure to the invert of the lowest pipe into or out of the structure or the bottom of the FROP-T section or is within 6 inches of the invert of the lowest pipe into or out of the structure or the bottom of the FROP-T section. Sump of structure contains no sediment. Damage to frame and/or top slab Corner of frame extends more than ¾ inch past curb face into the street (If applicable). Frame is even with curb. Top slab has holes larger than 2 square inches or cracks wider than ¼ inch. Top slab is free of holes and cracks. Frame not sitting flush on top slab, i.e., separation of more than ¾ inch of the frame from the top slab. Frame is sitting flush on top slab. Cracks in walls or bottom Cracks wider than ½ inch and longer than 3 feet, any evidence of soil particles entering structure through cracks, or maintenance person judges that structure is unsound. Structure is sealed and structurally sound. Cracks wider than ½ inch and longer than 1 foot at the joint of any inlet/outlet pipe or any evidence of soil particles entering structure through cracks. No cracks more than 1/4 inch wide at the joint of inlet/outlet pipe. Settlement/ misalignment Structure has settled more than 1 inch or has rotated more than 2 inches out of alignment. Basin replaced or repaired to design standards. Damaged pipe joints Cracks wider than ½-inch at the joint of the inlet/outlet pipes or any evidence of soil entering the structure at the joint of the inlet/outlet pipes. No cracks more than ¼-inch wide at the joint of inlet/outlet pipes. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Ladder rungs missing or unsafe Ladder is unsafe due to missing rungs, misalignment, rust, cracks, or sharp edges. Ladder meets design standards and allows maintenance person safe access. FROP-T Section Damaged FROP-T T section is not securely attached to structure wall and outlet pipe structure should support at least 1,000 lbs of up or down pressure. T section securely attached to wall and outlet pipe. Structure is not in upright position (allow up to 10% from plumb). Structure in correct position. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 2017 City of Renton Surface Water Design Manual 12/12/2016 A-9 NO. 4 – CONTROL STRUCTURE/FLOW RESTRICTOR MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITION WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED FROP-T Section (cont.) Damaged FROP-T (cont.) Connections to outlet pipe are not watertight or show signs of deteriorated grout. Connections to outlet pipe are water tight; structure repaired or replaced and works as designed. Any holes—other than designed holes—in the structure. Structure has no holes other than designed holes. Cleanout Gate Damaged or missing cleanout gate Cleanout gate is missing. Replace cleanout gate. Cleanout gate is not watertight. Gate is watertight and works as designed. Gate cannot be moved up and down by one maintenance person. Gate moves up and down easily and is watertight. Chain/rod leading to gate is missing or damaged. Chain is in place and works as designed. Orifice Plate Damaged or missing orifice plate Control device is not working properly due to missing, out of place, or bent orifice plate. Plate is in place and works as designed. Obstructions to orifice plate Any trash, debris, sediment, or vegetation blocking the plate. Plate is free of all obstructions and works as designed. Overflow Pipe Obstructions to overflow pipe Any trash or debris blocking (or having the potential of blocking) the overflow pipe. Pipe is free of all obstructions and works as designed. Deformed or damaged lip of overflow pipe Lip of overflow pipe is bent or deformed. Overflow pipe does not allow overflow at an elevation lower than design Inlet/Outlet Pipe Sediment accumulation Sediment filling 20% or more of the pipe. Inlet/outlet pipes clear of sediment. Trash and debris Trash and debris accumulated in inlet/outlet pipes (includes floatables and non-floatables). No trash or debris in pipes. Damaged inlet/outlet pipe Cracks wider than ½-inch at the joint of the inlet/outlet pipes or any evidence of soil entering at the joints of the inlet/outlet pipes. No cracks more than ¼-inch wide at the joint of the inlet/outlet pipe. Metal Grates (If applicable) Unsafe grate opening Grate with opening wider than 7/8 inch. Grate opening meets design standards. Trash and debris Trash and debris that is blocking more than 20% of grate surface. Grate free of trash and debris. footnote to guidelines for disposal Damaged or missing grate Grate missing or broken member(s) of the grate. Grate is in place and meets design standards. Manhole Cover/Lid Cover/lid not in place Cover/lid is missing or only partially in place. Any open structure requires urgent maintenance. Cover/lid protects opening to structure. Locking mechanism not working Mechanism cannot be opened by one maintenance person with proper tools. Bolts cannot be seated. Self-locking cover/lid does not work. Mechanism opens with proper tools. Cover/lid difficult to remove One maintenance person cannot remove cover/lid after applying 80 lbs. of lift. Cover/lid can be removed and reinstalled by one maintenance person. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 12/12/2016 2017 City of Renton Surface Water Design Manual A-10 NO. 5 – CATCH BASINS AND MANHOLES MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITION WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Structure Sediment accumulation Sediment exceeds 60% of the depth from the bottom of the catch basin to the invert of the lowest pipe into or out of the catch basin or is within 6 inches of the invert of the lowest pipe into or out of the catch basin. Sump of catch basin contains no sediment. Trash and debris Trash or debris of more than ½ cubic foot which is located immediately in front of the catch basin opening or is blocking capacity of the catch basin by more than 10%. No Trash or debris blocking or potentially blocking entrance to catch basin. Trash or debris in the catch basin that exceeds 1/3 the depth from the bottom of basin to invert the lowest pipe into or out of the basin. No trash or debris in the catch basin. Dead animals or vegetation that could generate odors that could cause complaints or dangerous gases (e.g., methane). No dead animals or vegetation present within catch basin. Deposits of garbage exceeding 1 cubic foot in volume. No condition present which would attract or support the breeding of insects or rodents. Damage to frame and/or top slab Corner of frame extends more than ¾ inch past curb face into the street (If applicable). Frame is even with curb. Top slab has holes larger than 2 square inches or cracks wider than ¼ inch. Top slab is free of holes and cracks. Frame not sitting flush on top slab, i.e., separation of more than ¾ inch of the frame from the top slab. Frame is sitting flush on top slab. Cracks in walls or bottom Cracks wider than ½ inch and longer than 3 feet, any evidence of soil particles entering catch basin through cracks, or maintenance person judges that catch basin is unsound. Catch basin is sealed and is structurally sound. Cracks wider than ½ inch and longer than 1 foot at the joint of any inlet/outlet pipe or any evidence of soil particles entering catch basin through cracks. No cracks more than 1/4 inch wide at the joint of inlet/outlet pipe. Settlement/ misalignment Catch basin has settled more than 1 inch or has rotated more than 2 inches out of alignment. Basin replaced or repaired to design standards. Damaged pipe joints Cracks wider than ½-inch at the joint of the inlet/outlet pipes or any evidence of soil entering the catch basin at the joint of the inlet/outlet pipes. No cracks more than ¼-inch wide at the joint of inlet/outlet pipes. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Inlet/Outlet Pipe Sediment accumulation Sediment filling 20% or more of the pipe. Inlet/outlet pipes clear of sediment. Trash and debris Trash and debris accumulated in inlet/outlet pipes (includes floatables and non-floatables). No trash or debris in pipes. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 2017 City of Renton Surface Water Design Manual 12/12/2016 A-11 NO. 5 – CATCH BASINS AND MANHOLES MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITION WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Inlet/Outlet Pipe (cont.) Damaged inlet/outlet pipe Cracks wider than ½-inch at the joint of the inlet/outlet pipes or any evidence of soil entering at the joints of the inlet/outlet pipes. No cracks more than ¼-inch wide at the joint of the inlet/outlet pipe. Metal Grates (Catch Basins) Unsafe grate opening Grate with opening wider than 7/8 inch. Grate opening meets design standards. Trash and debris Trash and debris that is blocking more than 20% of grate surface. Grate free of trash and debris. footnote to guidelines for disposal Damaged or missing grate Grate missing or broken member(s) of the grate. Any open structure requires urgent maintenance. Grate is in place and meets design standards. Manhole Cover/Lid Cover/lid not in place Cover/lid is missing or only partially in place. Any open structure requires urgent maintenance. Cover/lid protects opening to structure. Locking mechanism not working Mechanism cannot be opened by one maintenance person with proper tools. Bolts cannot be seated. Self-locking cover/lid does not work. Mechanism opens with proper tools. Cover/lid difficult to remove One maintenance person cannot remove cover/lid after applying 80 lbs. of lift. Cover/lid can be removed and reinstalled by one maintenance person. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 12/12/2016 2017 City of Renton Surface Water Design Manual A-12 NO. 6 – CONVEYANCE PIPES AND DITCHES MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITIONS WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Pipes Sediment & debris accumulation Accumulated sediment or debris that exceeds 20% of the diameter of the pipe. Water flows freely through pipes. Vegetation/root growth in pipe Vegetation/roots that reduce free movement of water through pipes. Water flows freely through pipes. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Damage to protective coating or corrosion Protective coating is damaged; rust or corrosion is weakening the structural integrity of any part of pipe. Pipe repaired or replaced. Damaged pipes Any dent that decreases the cross section area of pipe by more than 20% or is determined to have weakened structural integrity of the pipe. Pipe repaired or replaced. Ditches Trash and debris Trash and debris exceeds 1 cubic foot per 1,000 square feet of ditch and slopes. Trash and debris cleared from ditches. Sediment accumulation Accumulated sediment that exceeds 20% of the design depth. Ditch cleaned/flushed of all sediment and debris so that it matches design. Noxious weeds Any noxious or nuisance vegetation which may constitute a hazard to City personnel or the public. Noxious and nuisance vegetation removed according to applicable regulations. No danger of noxious vegetation where City personnel or the public might normally be. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Excessive vegetation growth Vegetation that reduces free movement of water through ditches. Water flows freely through ditches. Erosion damage to slopes Any erosion observed on a ditch slope. Slopes are not eroding. Rock lining out of place or missing (If applicable) One layer or less of rock exists above native soil area 5 square feet or more, any exposed native soil. Replace rocks to design standards. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 2017 City of Renton Surface Water Design Manual 12/12/2016 A-15 NO. 9 – FENCING MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITIONS WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Site Erosion or holes under fence Erosion or holes more than 4 inches high and 12-18 inches wide permitting access through an opening under a fence. No access under the fence. Wood Posts, Boards and Cross Members Missing or damaged parts Missing or broken boards, post out of plumb by more than 6 inches or cross members broken No gaps on fence due to missing or broken boards, post plumb to within 1½ inches, cross members sound. Weakened by rotting or insects Any part showing structural deterioration due to rotting or insect damage All parts of fence are structurally sound. Damaged or failed post foundation Concrete or metal attachments deteriorated or unable to support posts. Post foundation capable of supporting posts even in strong wind. Metal Posts, Rails and Fabric Damaged parts Post out of plumb more than 6 inches. Post plumb to within 1½ inches. Top rails bent more than 6 inches. Top rail free of bends greater than 1 inch. Any part of fence (including post, top rails, and fabric) more than 1 foot out of design alignment. Fence is aligned and meets design standards. Missing or loose tension wire. Tension wire in place and holding fabric. Deteriorated paint or protective coating Part or parts that have a rusting or scaling condition that has affected structural adequacy. Structurally adequate posts or parts with a uniform protective coating. Openings in fabric Openings in fabric are such that an 8-inch diameter ball could fit through. Fabric mesh openings within 50% of grid size. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 12/12/2016 2017 City of Renton Surface Water Design Manual A-16 NO. 10 – GATES/BOLLARDS/ACCESS BARRIERS MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITIONS WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Chain Link Fencing Gate Damaged or missing members Missing gate. Gates in place. Broken or missing hinges such that gate cannot be easily opened and closed by a maintenance person. Hinges intact and lubed. Gate is working freely. Gate is out of plumb more than 6 inches and more than 1 foot out of design alignment. Gate is aligned and vertical. Missing stretcher bar, stretcher bands, and ties. Stretcher bar, bands, and ties in place. Locking mechanism does not lock gate Locking device missing, no-functioning or does not link to all parts. Locking mechanism prevents opening of gate. Openings in fabric Openings in fabric are such that an 8-inch diameter ball could fit through. Fabric mesh openings within 50% of grid size. Bar Gate Damaged or missing cross bar Cross bar does not swing open or closed, is missing or is bent to where it does not prevent vehicle access. Cross bar swings fully open and closed and prevents vehicle access. Locking mechanism does not lock gate Locking device missing, no-functioning or does not link to all parts. Locking mechanism prevents opening of gate. Support post damaged Support post does not hold cross bar up. Cross bar held up preventing vehicle access into facility. Bollards Damaged or missing bollards Bollard broken, missing, does not fit into support hole or hinge broken or missing. No access for motorized vehicles to get into facility. Bollards do not lock Locking assembly or lock missing or cannot be attached to lock bollard in place. No access for motorized vehicles to get into facility. Boulders Dislodged boulders Boulders not located to prevent motorized vehicle access. No access for motorized vehicles to get into facility. Evidence of vehicles circumventing boulders Motorized vehicles going around or between boulders. No access for motorized vehicles to get into facility. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 2017 City of Renton Surface Water Design Manual 12/12/2016 A-17 NO. 11 – GROUNDS (LANDSCAPING) MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITIONS WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Site Trash and debris Any trash and debris which exceed 1 cubic foot per 1,000 square feet (this is about equal to the amount of trash it would take to fill up one standard size office garbage can). In general, there should be no visual evidence of dumping. Trash and debris cleared from site. Noxious weeds Any noxious or nuisance vegetation which may constitute a hazard to City personnel or the public. Noxious and nuisance vegetation removed according to applicable regulations. No danger of noxious vegetation where City personnel or the public might normally be. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Excessive growth of grass/groundcover Grass or groundcover exceeds 18 inches in height. Grass or groundcover mowed to a height no greater than 6 inches. Trees and Shrubs Hazard tree identified Any tree or limb of a tree identified as having a potential to fall and cause property damage or threaten human life. A hazard tree identified by a qualified arborist must be removed as soon as possible. No hazard trees in facility. Damaged tree or shrub identified Limbs or parts of trees or shrubs that are split or broken which affect more than 25% of the total foliage of the tree or shrub. Trees and shrubs with less than 5% of total foliage with split or broken limbs. Trees or shrubs that have been blown down or knocked over. No blown down vegetation or knocked over vegetation. Trees or shrubs free of injury. Trees or shrubs which are not adequately supported or are leaning over, causing exposure of the roots. Tree or shrub in place and adequately supported; dead or diseased trees removed. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 12/12/2016 2017 City of Renton Surface Water Design Manual A-18 NO. 12 – ACCESS ROADS MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITION WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Site Trash and debris Trash and debris exceeds 1 cubic foot per 1,000 square feet (i.e., trash and debris would fill up one standards size garbage can). Roadway drivable by maintenance vehicles. Debris which could damage vehicle tires or prohibit use of road. Roadway drivable by maintenance vehicles. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Blocked roadway Any obstruction which reduces clearance above road surface to less than 14 feet. Roadway overhead clear to 14 feet high. Any obstruction restricting the access to a 10- to 12 foot width for a distance of more than 12 feet or any point restricting access to less than a 10 foot width. At least 12-foot of width on access road. Road Surface Erosion, settlement, potholes, soft spots, ruts Any surface defect which hinders or prevents maintenance access. Road drivable by maintenance vehicles. Vegetation on road surface Trees or other vegetation prevent access to facility by maintenance vehicles. Maintenance vehicles can access facility. Shoulders and Ditches Erosion Erosion within 1 foot of the roadway more than 8 inches wide and 6 inches deep. Shoulder free of erosion and matching the surrounding road. Weeds and brush Weeds and brush exceed 18 inches in height or hinder maintenance access. Weeds and brush cut to 2 inches in height or cleared in such a way as to allow maintenance access. Modular Grid Pavement Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Damaged or missing blocks/grids Access surface compacted because of broken on missing modular block. Access road surface restored so road infiltrates. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 2017 City of Renton Surface Water Design Manual 12/12/2016 A-31 NO. 21 – PROPRIETARY FACILITY CARTRIDGE FILTER SYSTEMS MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITION WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED In addition to the specific maintenance criteria provided below, all manufacturers’ requirements shall be followed. Facility Documentation Update facility inspection record after each inspection. Maintenance records are up to date. Provide certification of replaced filter media. Filter media is certified to meet manufacturer specifications. Site Trash and debris Any trash or debris which impairs the function of the facility. Trash and debris removed from facility. Contaminants and pollution Any evidence of contaminants or pollution such as oils, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Life cycle Once per year. Facility is re-inspected and any needed maintenance performed. Vault Treatment Area Sediment on vault floor Varies – Refer to manufacturer’s requirements. Vault is free of sediment. Sediment on top of cartridges Varies – Refer to manufacturer’s requirements. Vault is free of sediment. Multiple scum lines above top of cartridges Thick or multiple scum lines above top of cartridges. Probably due to plugged canisters or underdrain manifold. Cause of plugging corrected, canisters replaced if necessary. Vault Structure Damage to wall, frame, bottom, and/or top slab Cracks wider than ½-inch and any evidence of soil particles entering the structure through the cracks, or qualified inspection personnel determines the vault is not structurally sound. Vault replaced or repaired to design specifications. Baffles damaged Baffles corroding, cracking warping, and/or showing signs of failure as determined by maintenance/inspection person. Repair or replace baffles to specification. Filter Media Standing water in vault Varies – Refer to manufacturer’s requirements. No standing water in vault 24 hours after a rain event. Short circuiting Flows do not properly enter filter cartridges. Flows go through filter media. Underdrains and Clean-Outs Sediment and debris Underdrains or clean-outs partially plugged or filled with sediment and/or debris. Underdrains and clean-outs free of sediment and debris. Inlet/Outlet Pipe Sediment accumulation Sediment filling 20% or more of the pipe. Inlet/outlet pipes clear of sediment. Trash and debris Trash and debris accumulated in inlet/outlet pipes (includes floatables and non-floatables). No trash or debris in pipes. Damaged inlet/outlet pipe Cracks wider than ½-inch at the joint of the inlet/outlet pipes or any evidence of soil entering at the joints of the inlet/outlet pipes. No cracks more than ¼-inch wide at the joint of the inlet/outlet pipe. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 12/12/2016 2017 City of Renton Surface Water Design Manual A-32 NO. 21 – PROPRIETARY FACILITY CARTRIDGE FILTER SYSTEMS MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITION WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Access Manhole Cover/lid not in place Cover/lid is missing or only partially in place. Any open manhole requires immediate maintenance. Manhole access covered. Locking mechanism not working Mechanism cannot be opened by one maintenance person with proper tools. Bolts cannot be seated. Self-locking cover/lid does not work. Mechanism opens with proper tools. Cover/lid difficult to remove One maintenance person cannot remove cover/lid after applying 80 lbs of lift. Cover/lid can be removed and reinstalled by one maintenance person. Ladder rungs unsafe Missing rungs, misalignment, rust, or cracks. Ladder meets design standards. Allows maintenance person safe access. Large Access Doors/Plate Damaged or difficult to open Large access doors or plates cannot be opened/removed using normal equipment. Replace or repair access door so it can opened as designed. Gaps, doesn't cover completely Large access doors not flat and/or access opening not completely covered. Doors close flat and cover access opening completely. Lifting Rings missing, rusted Lifting rings not capable of lifting weight of door or plate. Lifting rings sufficient to lift or remove door or plate. APPENDIX K DECLARATION OF COVENANT