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Home My WebLink About540 N West Ave_PWD3456_2025 CONSTRUCTION PERMIT APPLICATION CommuniA and Economic Development Gty of Arlington . 18204 59'h Avenue NE . Arlington,W A9a223 . Phone {360i zt03-3 551 crvrl(rwEr) g GRADING/PAVING/DRAINAGE (TYPE TI) D RIGHT OF WAY (TYPE III) tr TYPEI&ITONI-Y NEW DEVELOPMENT tr REDEVELOPMf,I{T g Pmiect Narle: STILIAGUAMISH SQUARE - PARKING EXPANSION Snohotuish County Tax Partel LD. #: 00618100200300-400 Project Address / Location: 540 North Wâ‚¬st Avenue, Arlington,98233 Description of Pmject: Parking lot expansion, new trash enclosure OWNER Nane: STILLAGUAMISH SQUARE tP 466r.u"". 526 NORTH WEST AVENUE City: ARtINGTON State: WA Zip: 98233 phone: (4251239-5074 Enail: dale.duskin@me.com APPUCANT Narue: SAME AS OWNER Addrpss: City: State: zip: Phoue: Eruail: ENCINEER Narle: Terraforma Design Group, lnc. Addrtss: 5027 51st Avenue SW oty: seattle Srate: WA Zip: 98136 phoDe. (206) 795-9023 Email: pedro@terraformadesigngroup.com License #. 35646 Expbation: Jun 2024 CONTRACTON Nalue: NOT DETFRMINED AT THIS TIME Address: Citv: State: zip: Photre: Erlail: License f: Expiration: l, heFby certw dral I have read and extuDined this applicatiorl Gty of Adington Mlnicipal flde. St:udard Plan & Spe(ificahons. Per{onlance of lhe proposedwork shall follow eU applicable lAws and rcguletioDs. ThE owner/appliralt shallassurue full:urd col plete râ‚¬sporNibility fo.seid work arrd shall be resportsible for the acquisitiol ;md coruplian(e of ell app]icable penuits nnd/or authorizations which ruey include, but not liDited to, Right of Wry Pemrit, WSDW Prcie(t Appmval (tlPA), WSDOE Notice oflnteDt {NOll, NatiorEl Pollutart Drsrharge ElinirEtioD St'stern [NPDES), Anuy Cor.l). of Engineers oftlre Endarrgered Species Acl, .lrId lhp Foresl Pruchres Apptcalion (FPA). Print Naue: , j-lo'zo23 Page 1 ofz RE\j11l2021 Complete package constitutes all itcms. Onl! complete submittals wiII be accepted, Clvil - Submittal Requirements. Type l: Electronic files shall be PDF oll \JSB fosh'drive, email, or drop-box il Conplete Application fl Constmrtion Plans including cut / fill quantities . 2 lirll size plan sets22" x34" . PDF file ofthe complete plan set ' 2 fi.rll size set oflandscape plals 22"x 34" N/A O Marysville Utiliff plans, ifapplicable (2 sets) f, Drainage Analysis including calculations ald rlownstream analysis (2 setsJ antl (PDF file); refer to Stornwater Drainage Requirenlents NIA n ceotechnical Report [2 sets) ard (PDF file) N/A tr SEPA is requirrd if 250 or more cubic yards of cut/fitl is proposed fnot required ifincluded with a Land Use Pennit); if there is not a Land Use Pernit associated with the proiect, Public Notice Materials will be required A 135 cuT / 135 Fltt Grading cut / fill quartity: N/A D Design Vehicle - demonstrate turning radirs include 45'Fire truck, dual axle, 2 56-inch wheelbase N/A O Drafts ofeasement(sJ dedication(s), and/or CAPE(sJ for review N/A Cl Flood Hazard Pemrit Application and rcquired docunâ‚¬ntation ifproiect is within 10o-year flood plain; refer to Flood Hazard guidance documents d Constmction Calculation Worksheet N/A tr NPDES Penrit (if requiredJ; see storm water Dminage Report, New or Redevelopment Flowcharts tr Assurarce Device will be required prior to Permit lssuance @ond or Assignment of Funds) @ Permit Fee due at tine of permit subnittal Gradine LPavine / Drainaee Submittal Requirements. T''pe ll: Eleclronic files shall be PDF ort IJSB flash-dive. enoil, or drcp.box tr Complete Application n Construction Plans including iuport/export quantities . 2 fullsize plan sels22" x34" . PDF file ofthe complete plan set fl Drainage Analysis including calculations and downstrtam analysis (2 sets) and {PDF file); refer to Stormwater Drainage Requirenlents n Geotechnical Report [2 sets) and IPDF Rle) D SEPA is requirâ‚¬d if 250 or ruorc cubic yards of cut/fill is proposed fnot rcquired if included with a Land Use Penxit] D SEPA Public Notice Material Requirenentsr . Snohouish County Assessor's Quarter Section Map: 0 Show Subject Property 0 Show 500 ft. Boundary . Current Owner List {of properties within 500ft. radius) including the following: D Tax Parcel ID Number(sJ O Ownerfs) Full Name(s) D Owner(s) Mailing AddressfesJ D Current Resident & Property Address (ifproperty owner doesn't reside at the property) . Mailing Material: Provide fl white, #10 envelopes with the following affixed to the envelopes: -l Postage I Mailing Labels fl Retum Address labels: 18204 596 Ave NE, Arlington WA 9A223 O Grading cut / fill quantity: f' Construction Cdcr ation Worksheet D NPDES Pernrit (if required); See -gtorrn Water Drainage Report, New or Redevelopment Flowcharts O PerIDit fee due at tirne of pernit subnrittal RiEht of Way Submittal Requirâ‚¬ments. Tylre lll: Electronic fles shall be PDF on UsB flash-drive, enail, or drcp-box O CorupleteApplication. n Constnrction Plans. D Traffic Control Plan. D Road Closure Request. n Tenrporary Erosion & Sedinrent Control (TESCJ Plan. tr Certificate oftnsurance with the City ofArlington narned as Additional Insured. O Assurance Device will be required prior to Permit Issuance (Bond or Assignrnent of Funds). A Engineers Estinated Cost ofConstruction; $ n Penuit fee due at tine of permit issuance. Peee 2 ol2 T ERRA F ORM A D ES IG N GROUP STORM DRAINAGE REPORT _______________________________________________________________________ STILLAGUAMISH SQUARE â€“ PARKING EXPANSION LOCATION: 540 West Avenue Arlington, WA 98233 ISSUE DATE: March 9, 2023 PREPARED FOR: Stillaguamish Square LP Contact: Cory Duskin 526 N. West Avenue Arlington, WA 98233 12/8/2022 C I V I L E N G I N E E R I N G & L A N D S C A P E A R C H I T E C T U R E 5027 51st Avenue SW Seattle WA 98136 phone 206.795.9023 website www.terraformadesigngroup.com STILLAGUAMISH SQUARE â€“ PARKING EXPANSION STORM DRAINAGE REPORT ______________________________________________________________ TABLE OF CONTENTS 1. PROJECT OVERVIEW & MAPS 1 2. EXISTING CONDITIONS SUMMARY 6 3. OFF-SITE ANALYSIS REPORT 14 4. SUMMARY OF MINIMUM REQUIREMENTS 16 5. PERMANENT STORMWATER CONTROL PLAN 21 6. CONSTRUCTION STORMWATER POLLUTION PREVENTION PLAN 21 7. SPECIAL REPORTS & STUDIES 21 8. OTHER PERMITS 21 9. OPERATION MAINTENANCE MANUAL, SOURCE CONTROL 21 10. BOND QUANTITIES WORKSHEET 21 APPENDIX A - DRAINAGE PLANS STILLAGUAMISH SQUARE â€“ PARKING EXPANSION STORM DRAINAGE REPORT ______________________________________________________________ SECTION 1 - PROJECT OVERVIEW AND MAPS This Storm Drainage Report for the Stillaguamish Square â€“ Parking Expansion has been submitted to the City of Arlington as part of our sitework permit submittal. Project Proponent: Stillaguamish Square LP Property Area: 1.73 acres Site Disturbance Area: 0.21 acres Site Location: 540 N. West Avenue, Arlington, WA 98233 SW 1/4 of SEC. 2, T31N, R5E City of Arlington, Snohomish County Parcel ID: 00618100200-300 00618100300-100,-200,-300,-400 Required Permits: Grading Permit The proposed development consists of an expansion of the southern parking lot as part of the existing Stillaguamish Square retail center. The previous building structure along 5th Street has been removed. Sitework will involve minor site demolition, grading and new asphalt paving for additional parking stalls. The existing trash enclosure will also be relocated. The project will result in approximately 3930 sf of new impervious and approximately 4353 sf of New + Replaced Hard Surface. The expanded parking area will continue to drain to the existing onsite private storm system. No new water quality or flow control measures are proposed. The scope of work involves 5 separate tax parcels all under the ownership of Stillaguamish Square LP. The project will require drainage review from the City of Arlington and compliance with the 2014 Washington State Department of Ecology Surface Water Management Manual for Western Washington. Page 1 STILLAGUAMISH SQUARE â€“ PARKING EXPANSION STORM DRAINAGE REPORT ______________________________________________________________ 523 N. West Avenue, Arlington, WA 98233 SW 1/4 of SEC. 2, T31N, R5E City of Arlington, Snohomish County Parcel ID: 00618100200300-400 Page 2 DIVISION STREET (OLD SR 530) STATE ROUTE 9 WEST AVENUE WORK AREA LIMITS 5TH STREET STILLAGUAMISH SQUARE PARKING EXP DRAINAGE BASIN MAP Page 3 DIVISION STREET WEST AVENUE STATE ROUTE 9 WORK AREA LIMITS 5TH STREET STILLAGUAMISH SQUARE PARKING EXPAN. DRAINAGE BASIN MAP Page 4 STILLAGUAMISH SQUARE â€“ PARKING EXPANSION STORM DRAINAGE REPORT ______________________________________________________________ LANDCOVER DATA Project Name: STILLAGUAMISH SQUARE - PARKING EXPANSION Project Number: 22029 DRAINAGE CRITERIA: CITY OF ARLINGTON Step 1) Site Data 1) General characteristics: Basin ALL Soil type Everett Gravelly Sandy Loam Development type retail Soil Group A Size (ac.) 0.21 Existing surface paving, planters Detention/Retention None Predev Cover Existing 2) Existing onsite characteristics: Landscape 7926 sf = 0.18 acres Roof 0 sf = 0.00 acres Paving 1059 sf = 0.02 acres Total 8985 sf = 0.21 acres 3) Developed onsite characteristics: Landscape 3838 sf = 0.09 acres Roof 0 sf = 0.00 acres Paving 5147 sf = 0.12 acres Total 8985 sf = 0.21 acres 4) Developed Landcover Changes: New Hard Surface: 4088 sf Replaced Hard Surface: 423 sf Page 5 STILLAGUAMISH SQUARE â€“ PARKING EXPANSION STORM DRAINAGE REPORT ______________________________________________________________ SECTION 2 - EXISTING CONDITIONS SUMMARY The existing 1.7 acre commercial center was originally constructed in 1980 and consists of a 20,000 sf commercial retail building with multiple tenants and associated parking and landscaping across five (5) tax parcels. Access is off of North West Avenue. Drainage is collected via catch basins with the parking areas west and east of the building structure. Drainage predominately discharges to the existing City storm system at the northwest corner of the site. The subject work area is south of the existing structure and within four (4) separately land parcels. This area was previously developed as a parking lot with a small building structure at 500 North West Avenue that since been demolished in 2020. The property is not within the 100-yr floodplain. We do not know of any onsite or nearby wetlands or sensitive areas. The existing soils are classified as Everett very gravelly sandy loam, 0 to 8% slopes. These soils are known for being recessional outwash. Depth to water table is expected to exceed 6 feet. The site is part of the Stillaguamish River Drainage Basin. See Section 3 for an Off-Site Analysis. Page 6 STILLAGUAMISH SQUARE â€“ PARKING EXPANSION STORM DRAINAGE REPORT ______________________________________________________________ EXISTING SITE AERIAL Page 7 STILLAGUAMISH SQUARE â€“ PARKING EXPANSION STORM DRAINAGE REPORT ______________________________________________________________ FEMA FLOODPLAIN MAP SITE IS NOT WITHIN A FLOODPLAIN Page 8 Soil Mapâ€”Snohomish County Area, Washington 122Â° 7' 44'' W 122Â° 7' 41'' W 564720 564730 564740 564750 564760 564770 564780 48Â° 11' 52'' N 48Â° 11' 52'' N 5338680 5338670 5338670 5338660 5338660 5338650 5338650 5338640 5338640 5338630 5338630 5338620 5338620 5338610 5338610 5338600 5338600 5338590 Soil Map may not be valid at this scale. 5338590 48Â° 11' 49'' N 48Â° 11' 49'' N 564720 564730 564740 564750 564760 564770 564780 Map Scale: 1:459 if printed on A portrait (8.5" x 11") sheet. Meters 122Â° 7' 44'' WN 0 5 10 20 30 122Â° 7' 41'' W Feet 0 20 40 80 120 Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84 Natural Resources Web Soil Survey 8/19/2022 Conservation Service National Cooperative Soil Survey Page 1 of 3 Page 9 Soil Mapâ€”Snohomish County Area, Washington MAP LEGEND MAP INFORMATION Area of Interest (AOI) Spoil Area The soil surveys that comprise your AOI were mapped at Area of Interest (AOI) 1:24,000. Stony Spot Soils Warning: Soil Map may not be valid at this scale. Very Stony Spot Soil Map Unit Polygons Wet Spot Enlargement of maps beyond the scale of mapping can cause Soil Map Unit Lines misunderstanding of the detail of mapping and accuracy of soil Other line placement. The maps do not show the small areas of Soil Map Unit Points contrasting soils that could have been shown at a more detailed Special Line Features Special Point Features scale. Blowout Water Features Streams and Canals Please rely on the bar scale on each map sheet for map Borrow Pit measurements. Transportation Clay Spot Source of Map: Natural Resources Conservation Service Rails Web Soil Survey URL: Closed Depression Interstate Highways Coordinate System: Web Mercator (EPSG:3857) Gravel Pit US Routes Maps from the Web Soil Survey are based on the Web Mercator Gravelly Spot projection, which preserves direction and shape but distorts Major Roads distance and area. A projection that preserves area, such as the Landfill Albers equal-area conic projection, should be used if more Local Roads Lava Flow accurate calculations of distance or area are required. Background Marsh or swamp Aerial Photography This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Mine or Quarry Soil Survey Area: Snohomish County Area, Washington Miscellaneous Water Survey Area Data: Version 23, Aug 31, 2021 Perennial Water Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Rock Outcrop Date(s) aerial images were photographed: Aug 16, 2020â€”Aug Saline Spot 19, 2020 Sandy Spot The orthophoto or other base map on which the soil lines were Severely Eroded Spot compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor Sinkhole shifting of map unit boundaries may be evident. Slide or Slip Sodic Spot Natural Resources Web Soil Survey 8/19/2022 Conservation Service National Cooperative Soil Survey Page 2 of 3 Page 10 Soil Mapâ€”Snohomish County Area, Washington Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 17 Everett very gravelly sandy 1.0 100.0% loam, 0 to 8 percent slopes Totals for Area of Interest 1.0 100.0% Natural Resources Web Soil Survey 8/19/2022 Conservation Service National Cooperative Soil Survey Page 3 of 3 Page 11 Map Unit Description: Everett very gravelly sandy loam, 0 to 8 percent slopes---Snohomish County Area, Washington Snohomish County Area, Washington 17â€”Everett very gravelly sandy loam, 0 to 8 percent slopes Map Unit Setting National map unit symbol: 2t629 Elevation: 30 to 900 feet Mean annual precipitation: 35 to 91 inches Mean annual air temperature: 48 to 52 degrees F Frost-free period: 180 to 240 days Farmland classification: Farmland of statewide importance Map Unit Composition Everett and similar soils: 80 percent Minor components: 20 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Everett Setting Landform: Kames, moraines, eskers Landform position (two-dimensional): Summit, shoulder Landform position (three-dimensional): Interfluve, crest Down-slope shape: Convex Across-slope shape: Convex Parent material: Sandy and gravelly glacial outwash Typical profile Oi - 0 to 1 inches: slightly decomposed plant material A - 1 to 3 inches: very gravelly sandy loam Bw - 3 to 24 inches: very gravelly sandy loam C1 - 24 to 35 inches: very gravelly loamy sand C2 - 35 to 60 inches: extremely cobbly coarse sand Properties and qualities Slope: 0 to 8 percent Depth to restrictive feature: More than 80 inches Drainage class: Somewhat excessively drained Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 5.95 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water supply, 0 to 60 inches: Low (about 3.2 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4s Hydrologic Soil Group: A Ecological site: F002XA004WA - Puget Lowlands Forest Natural Resources Web Soil Survey 8/19/2022 Conservation Service National Cooperative Soil Survey Page 1 of 2 Page 12 Map Unit Description: Everett very gravelly sandy loam, 0 to 8 percent slopes---Snohomish County Area, Washington Forage suitability group: Droughty Soils (G002XN402WA), Droughty Soils (G002XF403WA), Droughty Soils (G002XS401WA) Other vegetative classification: Droughty Soils (G002XN402WA), Droughty Soils (G002XF403WA), Droughty Soils (G002XS401WA) Hydric soil rating: No Minor Components Indianola Percent of map unit: 10 percent Landform: Terraces, kames, eskers Landform position (three-dimensional): Tread Down-slope shape: Linear Across-slope shape: Linear Hydric soil rating: No Alderwood Percent of map unit: 10 percent Landform: Hills, ridges Landform position (two-dimensional): Summit Landform position (three-dimensional): Crest, talf Down-slope shape: Convex, linear Across-slope shape: Convex Hydric soil rating: No Data Source Information Soil Survey Area: Snohomish County Area, Washington Survey Area Data: Version 23, Aug 31, 2021 Natural Resources Web Soil Survey 8/19/2022 Conservation Service National Cooperative Soil Survey Page 2 of 2 Page 13 STILLAGUAMISH SQUARE â€“ PARKING EXPANSION STORM DRAINAGE REPORT ______________________________________________________________ SECTION 3 - OFFSITE ANALYSIS REPORT The new parking lot expansion will continue to sheet drain towards the existing parking lot. Surface runoff will be collected by catch basins within the existing shopping center parking lot and outfall into the existing City 12â€ storm drain at the northeast corner of the site. Runoff crossing West Division Avenue via an 18â€ steel storm drain before turning westward along West Division Avenue via a 36â€ concrete storm main. The city storm system then continues northward via a 36â€ concrete main along the east side of East WA-530. Drainage then turns westward under the roadway via a 36â€ concrete main just north of West Burke Avenue where it outfalls into the City of Arlingtonâ€™s Stormwater Wetland Park property at approximately 1400 lf downstream of the existing shopping center. Runoff then meanders within a natural drainage swale . It ultimately enters a 36â€ culvert and then outfalls into the Stillaguamish River. See attached Downstream Drainage Map. Page 14 Page 15 STILLAGUAMISH SQUARE â€“ PARKING EXPANSION STORM DRAINAGE REPORT ______________________________________________________________ SECTION 4 - SUMMARY OF MINUMUM REQUIREMENTS The project will require drainage review from the City of Arlington and compliance with the 2014 Washington State Department of Ecology Surface Water Management Manual for Western Washington. The following flowcharts will establish the drainage requirements for the project. Page 16 STILLAGUAMISH SQUARE â€“ PARKING EXPANSION STORM DRAINAGE REPORT ______________________________________________________________ Page 17 STILLAGUAMISH SQUARE â€“ PARKING EXPANSION STORM DRAINAGE REPORT ______________________________________________________________ Minimum Requirements #1 - #5 apply to the projectâ€™s new and replaced hard surfaces and the land disturbed as provided within Vol. 1, Section 2 of the DOE Manual: Minimum Requirement #1 â€“ Stormwater Site Plan This Storm Drainage Report and the Civil Plans address the temporary and permanent drainage impacts of the project. Minimum Requirement #2 â€“ Construction Stormwater Pollution Prevention Plan An Erosion Control Plan and Construction Stormwater Pollution Prevention Plan (CSWPPP) is included with our permit submittal. Minimum Requirement #3 - Source Control of Pollution The proposed parking lot expansion and relocated trash enclosure is a relatively low pollution generator. No proposed source control measures are proposed other than typical maintenance of the commercial parking grounds. Minimum Requirement #4 â€“ Preservation of Natural Drainage Systems and Outfalls The proposed redevelopment will maintain the existing drainage flow patterns. Page 18 STILLAGUAMISH SQUARE â€“ PARKING EXPANSION STORM DRAINAGE REPORT ______________________________________________________________ Minimum Requirement #5 â€“ On-Site Stormwater Management As required by the 2014 SWMMWW, On-Site Stormwater Management is required where feasible based on site conditions. Stormwater Management BMPs have been evaluated based on the following flowchart. Page 19 STILLAGUAMISH SQUARE â€“ PARKING EXPANSION STORM DRAINAGE REPORT ______________________________________________________________ Onsite Stormwater Management is required of the project since our project requires compliance with MR1 â€“ MR5. Since the existing shopping center proposing no new infiltration facilities to meet the LID Performance Standard, on-site Stormwater Management BMPs from List #1 will be evaluated for all new and replaced hard surfaces and disturbed pervious surfaces. The following is an outline of our landcover area and the viability of each Onsite Stormwater Management BMP (viability analysis noted in bold): For each surface, consider the BMPs in the order listed for that type of surface. Use the first BMP that is considered feasible. No other On-site Stormwater Management BMP is necessary for that surface. Feasibility shall be determined by evaluation against: 1. Design criteria, limitations, and infeasibility criteria identified for each BMP in this manual; and 2. Competing Needs Criteria listed in Chapter V-5 - On-Site Stormwater Management. Lawn and Landscaped Areas Post Construction Soil Quality and Depth in accordance with BMP T5.13 â€“ This BMP will be implemented for the proposed pervious areas disturbed during construction. Roofs Not applicable; no new roof areas are proposed. Other Hard Surfaces (paving) 1. Full Dispersion in accordance with BMP T5.30: Full Dispersion. Not Feasible: site cannot preserve 65% of the site in forest or native condition (none exists). 2. Permeable pavement in accordance with BMP T5.15: Permeable Pavements. Not Feasible: the proposed new parking areas are designed to sheet drain towards the existing parking lot. Implementing pervious pavement for our new parking areas may create saturated soil conditions where the new pervious pavement would meet the existing impervious asphalt pavement and would compromise adjacent impervious pavements. 3. Bioretention BMPâ€™s (BMP T7.30: Bioretention Cells, Swales, and Planter Boxes) that have a minimum horizontally projected surface area below the overflow which is at least 5% of the total surface area draining to it. Not Feasible: inadequate site area to meet the 5% area requirement within our proposed work area. 4. Sheet Flow Dispersion in accordance with BMP T5.12: Sheet Flow Dispersion, or Concentrated Flow Dispersion in accordance with BMP T5.11: Concentrated Flow Dispersion. Not Feasible: inadequate site area to meet the 25-foot vegetative flow path. No Stormwater Management measures are proposed for the project Other Hard Surfaces. Page 20 STILLAGUAMISH SQUARE â€“ PARKING EXPANSION STORM DRAINAGE REPORT ______________________________________________________________ SECTION 5 - PERMANENT STORMWATER CONTROL PLAN No new stormwater facilities are proposed. The new parking lot expansion will continue to sheet drain towards the existing parking lot. Surface runoff will be collected by catch basins within the existing shopping center parking lot. SECTION 6 - CONSTRUCTION STORMWATER POLLUTION PREVENTION PLAN An Erosion Control Plan and Construction Stormwater Pollution Prevention Plan will be provided separately. SECTION 7 - SPECIAL REPORTS & STUDIES None. SECTION 8 - OTHER PERMITS A Department of Ecology Construction Stormwater Permit will not be applied for since our site our site disturbance will not exceed one (1) acre. SECTION 9 - OPERATION MAINTENANCE MANUAL, SOURCE CONTROL Not applicable. SECTION 10 - BOND QUANTITIES WORKSHEET A Bond Quantities Worksheet has been submitted to the City. Page 21 STILLAGUAMISH SQUARE â€“ PARKING EXPANSION STORM DRAINAGE REPORT ______________________________________________________________ APPENDIX A â€“ DRAINAGE PLANS STILLAGUAMISH SQUARE - PARKING EXPANSION LEGEND SW1/4 OF SEC. 2, T31N, R5E, W.M., SNOHOMISH COUNTY, WA PROPERTY INFO CALL AT LEAST 2 WORKING DAYS BEFORE YOU DIG CALL '811' VICINITY MAP DATE PROJECT TEAM REFER TO ARCHITECTURAL PLANS FOR REVISION SITE HORIZONTAL CONTROL AND ON-SITE SURFACE DETAILS (I.E. CURBS, WALKWAYS, STRIPING, SIGNAGE, ETC.) NO GOVERNING AGENCIES WEST AVENUE ORMA F PROJECT DATA ERRA T DESIGN GROUP, INC. LIMITS OF CLEARING PROJECT NO. & GRADING DRAWN BY: CHECKED BY: SHEET INDEX LIMITS OF CLEARING & GRADING 5TH STREET LIMITS OF CLEARING & GRADING DIVISION STREET STILLAGUAMISH SQUARE - PARKING EXPANSION SHEET TITLE CITY OF ARLINGTON TESC PLAN CONSTRUCTION DRAWING REVIEW APPROVAL THE PLAN SHEET HAS BEEN REVIEWED AND APPROVED PER THE CONDITIONS OF THIS TITLE SHEET. SHEET NO. STATE ROUTE 9 BY: Development Services Manager DATE: THIS APPROVAL IS VALID FOR 19 MONTHS C1.1 STILLAGUAMISH SQUARE - PARKING EXPANSION SW1/4 OF SEC. 2, T31N, R5E, W.M., SNOHOMISH COUNTY, WA LEGEND REFER TO ARCHITECTURAL PLANS FOR SITE HORIZONTAL CONTROL CALL AT LEAST 2 WORKING AND ON-SITE SURFACE DETAILS DAYS BEFORE YOU DIG (I.E. CURBS, WALKWAYS, STRIPING, SIGNAGE, ETC.) CALL '811' DATE REVISION NO WEST AVENUE ORMA F ERRA T DESIGN GROUP, INC. PROJECT NO. DRAWN BY: CHECKED BY: 5TH STREET DIVISION STREET STILLAGUAMISH SQUARE - PARKING EXPANSION SHEET TITLE CITY OF ARLINGTON PAVING PLAN CONSTRUCTION DRAWING REVIEW APPROVAL THE PLAN SHEET HAS BEEN REVIEWED AND APPROVED PER THE CONDITIONS OF THIS TITLE SHEET. SHEET NO. STATE ROUTE 9 BY: Development Services Manager DATE: THIS APPROVAL IS VALID FOR 19 MONTHS C1.2 STILLAGUAMISH SQUARE - PARKING EXPANSION LEGEND SW1/4 OF SEC. 2, T31N, R5E, W.M., SNOHOMISH COUNTY, WA CALL AT LEAST 2 WORKING DAYS BEFORE YOU DIG CALL '811' DATE REVISION NO WEST AVENUE ORMA F ERRA T DESIGN GROUP, INC. PROJECT NO. DRAWN BY: CHECKED BY: 5TH STREET DIVISION STREET ELEVATIONS REFLECT STILLAGUAMISH SQUARE - PARKING EXPANSION PAVEMENT GRADE (U.N.O.) SHEET TITLE CITY OF ARLINGTON CIVIL PLAN CONSTRUCTION DRAWING REVIEW APPROVAL THE PLAN SHEET HAS BEEN REVIEWED AND APPROVED PER THE CONDITIONS OF THIS TITLE SHEET. SHEET NO. STATE ROUTE 9 BY: Development Services Manager DATE: THIS APPROVAL IS VALID FOR 19 MONTHS C1.3 STILLAGUAMISH SQUARE - PARKING EXPANSION SW1/4 OF SEC. 2, T31N, R5E, W.M., SNOHOMISH COUNTY, WA CITY OF ARLINGTON TESC NOTES TESC CONSTRUCTION SEQUENCE DATE FOR EXISTING AND NEW CATCH BASINS â€™ CB INLET FILTER (BMP C220) HOT-MIX ASPHALT SECTION REVISION NO ORMA â€™ STRAW WATTLE (BMP C235) F TEMPORARY HYDROSEED MIXTURE ERRA T DESIGN GROUP, INC. PROJECT NO. DRAWN BY: â€œ â€ CHECKED BY: â€œ â€ â€œ â€ CONCRETE HANDLING NOTES â€™ â€œ â€ â€™ â€œ â€ STILLAGUAMISH SQUARE - PARKING EXPANSION SHEET TITLE POST-CONSTRUCTION SOIL QUALITY & DEPTH CITY OF ARLINGTON CIVIL DETAILS CONSTRUCTION DRAWING REVIEW APPROVAL & NOTES THE PLAN SHEET HAS BEEN REVIEWED AND APPROVED PER THE CONDITIONS OF THIS TITLE SHEET. SHEET NO. BY: Development Services Manager DATE: THIS APPROVAL IS VALID FOR 19 MONTHS C1.4 Construction Stormwater General Permit (CSWGP) Stormwater Pollution Prevention Plan (SWPPP) for STILLAGUAMISH SQUARE â€“ PARKING EXPANSION Prepared for: Department of Ecology â€“ NW Region City of Arlington Permittee / Owner Developer Operator / Contractor Stillaguamish Square LP Stillaguamish Square LP Not Determined at this Time 540 N. West Ave 540 N. West Ave Arlington, WA Arlington, WA Contact: Cory Duskin Contact: Cory Duskin 540 N. West Avenue, Arlington, WA 98233 Certified Erosion and Sediment Control Lead (CESCL) Name Organization Contact Phone Number Not Determined at this Time SWPPP Prepared By Name Organization Contact Phone Number Pedro DeGuzman, PE Terraforma Design Group (206) 795-9023 SWPPP Preparation Date March 9, 2023 Project Construction Dates Activity / Phase Start Date End Date Start Construction 4/1/2023 4/30/2023 Table of Contents 1 Project Information 4 1.1 Existing Conditions 4 1.2 Proposed Construction Activities 4 2 Construction Stormwater Best Management Practices (BMPs) 6 2.1 The 13 Elements 7 2.1.1 Element 1: Preserve Vegetation / Mark Clearing Limits 7 2.1.2 Element 2: Establish Construction Access 8 2.1.3 Element 3: Control Flow Rates 9 2.1.4 Element 4: Install Sediment Controls 10 2.1.5 Element 5: Stabilize Soils 11 2.1.6 Element 6: Protect Slopes 12 2.1.7 Element 7: Protect Drain Inlets 13 2.1.8 Element 8: Stabilize Channels and Outlets 14 2.1.9 Element 9: Control Pollutants 15 2.1.10 Element 10: Control Dewatering 18 2.1.11 Element 11: Maintain BMPs 19 2.1.12 Element 12: Manage the Project 20 2.1.13 Element 13: Protect Low Impact Development (LID) BMPs 21 3 Pollution Prevention Team 22 4 Monitoring and Sampling Requirements 23 4.1 Site Inspection 23 4.2 Stormwater Quality Sampling 23 4.2.1 Turbidity Sampling 23 4.2.2 pH Sampling 25 5 Discharges to 303(d) or Total Maximum Daily Load (TMDL) Waterbodies 26 5.1 303(d) Listed Waterbodies 26 5.2 TMDL Waterbodies 26 6 Reporting and Record Keeping 27 6.1 Record Keeping 27 6.1.1 Site Log Book 27 6.1.2 Records Retention 27 6.1.3 Updating the SWPPP 27 6.2 Reporting 28 6.2.1 Discharge Monitoring Reports 28 6.2.2 Notification of Noncompliance 28 List of Tables Table 1 â€“ Summary of Site Pollutant Constituents 4 Table 2 â€“ Pollutants 15 Table 3 â€“ pH-Modifying Sources 16 Table 4 â€“ Dewatering BMPs 18 Table 5 â€“ Management 20 Table 6 â€“ BMP Implementation Schedule 21 Table 7 â€“ Team Information 22 Table 8 â€“ Turbidity Sampling Method 23 Table 9 â€“ pH Sampling Method 25 List of Appendices Error! Reference source not found.A. Error! Reference source not found. B. BMP Detail C. Correspondence D. Site Inspection Form E. Construction Stormwater General Permit (CSWGP) F. 303(d) List Waterbodies / TMDL Waterbodies Information G. Contaminated Site Information H. Engineering Calculations List of Acronyms and Abbreviations Acronym / Abbreviation Explanation 303(d) Section of the Clean Water Act pertaining to Impaired Waterbodies BFO Bellingham Field Office of the Department of Ecology BMP(s) Best Management Practice(s) CESCL Certified Erosion and Sediment Control Lead CO2 Carbon Dioxide CRO Central Regional Office of the Department of Ecology CSWGP Construction Stormwater General Permit CWA Clean Water Act DMR Discharge Monitoring Report DO Dissolved Oxygen Ecology Washington State Department of Ecology EPA United States Environmental Protection Agency ERO Eastern Regional Office of the Department of Ecology ERTS Environmental Report Tracking System ESC Erosion and Sediment Control GULD General Use Level Designation NPDES National Pollutant Discharge Elimination System NTU Nephelometric Turbidity Units NWRO Northwest Regional Office of the Department of Ecology pH Power of Hydrogen RCW Revised Code of Washington SPCC Spill Prevention, Control, and Countermeasure su Standard Units SWMMEW Stormwater Management Manual for Eastern Washington SWMMWW Stormwater Management Manual for Western Washington SWPPP Stormwater Pollution Prevention Plan TESC Temporary Erosion and Sediment Control SWRO Southwest Regional Office of the Department of Ecology TMDL Total Maximum Daily Load VFO Vancouver Field Office of the Department of Ecology WAC Washington Administrative Code WSDOT Washington Department of Transportation WWHM Western Washington Hydrology Model Project Information (1.0) Project/Site Name: STILLAGUAMISH SQUARE â€“ PARKING EXPANSION Street/Location: 540 N. West Avenue City / State / Zip: Arlington, WA 98233 Subdivision: N/A Receiving waterbody: Stillaguamish River Existing Conditions (1.1) Total acreage (including support activities such as off-site equipment staging yards, material storage areas, borrow areas). Total acreage: 1.73 acres Disturbed acreage: 0.21 acres Existing structures: existing commercial center and parking lot Landscape topography: 2-3% slope within parking lot Drainage patterns: drain to existing parking lot CBs Existing Vegetation: Existing parking & perimeter trees, groundcover Critical Areas (wetlands, None streams, high erosion risk, steep or difficult to stabilize slopes): List of known impairments for 303(d) listed or Total Maximum Daily Load (TMDL) for the receiving waterbody: None Table 1 includes a list of suspected and/or known contaminants associated with the construction activity. Table 1 â€“ Summary of Site Pollutant Constituents Constituent Location Depth Concentration (Pollutant) None Proposed Construction Activities (1.2) Description of site development (example: subdivision): Expanded parking area, relocate trash enclosure Description of construction activities (example: site preparation, demolition, excavation): Minor site clearing and demo to expand parking lot. Relocated trash enclosure, new lights. Description of site drainage including flow from and onto adjacent properties. Must be consistent with Site Map in Appendix A: Existing parking lot area drains to an existing catch basins within parking lot to the north. Description of final stabilization (example: extent of revegetation, paving, landscaping): Final stabilization to consists of the new pavement and post construction soil quality and depth. Contaminated Site Information: We do not know of any existing onsite contamination. Construction Stormwater Best Management Practices (BMPs) (2.0) The SWPPP is a living document reflecting current conditions and changes throughout the life of the project. These changes may be informal (i.e. hand-written notes and deletions). Update the SWPPP when the CESCL has noted a deficiency in BMPs or deviation from original design. The 13 Elements (2.1) Element 1: Preserve Vegetation / Mark Clearing Limits (2.1.1) A protective barrier shall be placed around the protected trees prior to land preparation or construction activities, and shall remain in place until all construction activity is terminated. No equipment, chemicals, soil deposits or construction materials shall be placed within the protective barriers. Any landscaping activities subsequent to the removal of the barriers shall be accomplished with light machinery or hand labor. Tree protection barriers shall be a minimum of four feet high, constructed of temporary chain link fencing. List and describe BMPs: N/A, no existing vegetation to preserve within work area. Installation Schedules: N/A Inspection and Maintenance plan: N/A Responsible Staff: N/A Element 2: Establish Construction Access (2.1.2) A stabilized construction entrance (BMP C105) is proposed at the north end of the work area for construction access. This BMP is intended to prevent vehicles from tracking dirt offsite. A rock construction road / parking area (BMPC107) is proposed beyond the rock entrance. These BMPs shall be maintained as necessary to ensure that sediment is not tracked offsite. The contractor may have to option to utilize the existing pavement within the work area as the construction access if the contractor can prevent tracking into the surrounding parking lot or streets. Street sweeping, street cleaning, or wheel wash/tire baths may be necessary if the stabilized construction access is not effective. All wheel wash wastewater shall be controlled on-site and CANNOT be discharged into waters of the State. List and describe BMPs: None. The proposed work area is too small to be practical for this BMP. Installation Schedules: N/A Inspection and Maintenance plan: N/A Responsible Staff: N/A Element 3: Control Flow Rates (2.1.3) No control of flowrates is necessary for this small scope of work. Will you construct stormwater retention and/or detention facilities? Yes No Will you use permanent infiltration ponds or other low impact development (example: rain gardens, bio-retention, porous pavement) to control flow during construction? Yes No List and describe BMPs: N/A Installation Schedules: N/A Inspection frequency and Maintenance plan (identify both): N/A Responsible Staff: N/A Element 4: Install Sediment Controls (2.1.4) Sediment controls are necessary to filter sediment from construction stormwater discharges. In the event that these measures are insufficient to filter out sediment, site contruction must be delayed until rainfall / runoff subsides. List and describe BMPs: BMP C220 â€“ Inlet Protection BMP C235 â€“ Straw Wattle Installation Schedules: Install prior to site clearing & grading Inspection frequency and Maintenance plan (identify both): daily, maintain as necessary Responsible Staff: General Contractor Element 5: Stabilize Soils (2.1.5) Exposed and unworked soils shall be stabilized based on the BMP options and timelines noted below. Contractor shall limit the work areas to a minimum area and duration as feasible to reduce site erosion and sedimentation. Stockpiles shall be covered if rainfall is expected in a 24 hour window. The duration of exposed steep slope cuts shall be kept to a minimum. West of the Cascade Mountains Crest Number of Days Soils Can Season Dates be Left Exposed During the Dry Season May 1 â€“ September 30 7 days During the Wet Season October 1 â€“ April 30 2 days Soils must be stabilized at the end of the shift before a holiday or weekend if needed based on the weather forecast. Anticipated project dates: Start date: April 1, 2023 End date: April 30, 2023 Will you construct during the wet season? Yes No List and describe BMPs: BMP C120 â€“ Temporary and Permanent Seeding BMP C121 â€“ Mulching Installation Schedules: Install at start of project Inspection frequency and Maintenance plan (identify both): daily, maintain as needed Responsible Staff: General Contractor Element 6: Protect Slopes (2.1.6) No steep slopes exist or will occur with site construction. Will steep slopes be present at the site during construction? Yes No List and describe BMPs: N/A Installation Schedules: N/A Inspection frequency and Maintenance plan (identify both): N/A Responsible Staff: N/A Element 7: Protect Drain Inlets (2.1.7) Catch basin inlet protection shall be installed for the existing catch basin downstream of the work area. Keep in mind inlet protection may function well for coarse sediment but is less effective in filtering finer particles and dissolved constituents. Inlet protection is the last component of a treatment train and protection of drain inlets include additional sediment and erosion control measures. Inlet protection devices will be cleaned (or removed and replaced), when sediment has filled the device by one third (1/3) or as specified by the manufacturer. Inlets will be inspected weekly at a minimum and daily during storm events. List and describe BMPs: BMP C220 â€“ Inlet Protection Installation Schedules: Install at start of project Inspection frequency and Maintenance plan (identify both): weekly, as necessary when 1/3 full Responsible Staff: General Contractor Element 8: Stabilize Channels and Outlets (2.1.8) Not Applicable; there are no existing or proposed channels. List and describe BMPs: N/A Installation Schedules: N/A Inspection frequency and Maintenance plan (identify both): N/A Responsible Staff: N/A Element 9: Control Pollutants (2.1.9) The following pollutants are anticipated to be present on-site: Table 2 â€“ Pollutants Pollutant (List pollutants and source, if applicable) Diesel Gasoline Motor Oil Paint Cleaning Solvent / Paint Thinners Construction Refuse Concrete Washwater All pollutants, including waste materials and demolition debris, that occur onsite shall be handled and disposed of in a manner that does not cause contamination of stormwater. Good housekeeping and preventative measures will be taken to ensure that the site will be kept clean, well organized, and free of debris. List and describe BMPs: BMP C151 â€“ Concrete Handling BMP C152 â€“ Sawcutting & Surfacing Pollution Prevention BMP C153 â€“ Material Delivery, Storage and Containment Installation Schedules: Install at start of project Inspection frequency and Maintenance plan (identify both): daily, maintain as necessary Responsible Staff: General Contractor Will maintenance, fueling, and/or repair of heavy equipment and vehicles occur on-site (majority of projects will fuel equipment on-site)? Yes No Spill control mats shall be proposed for all fueling operations. Size to depend on the volume of tank involved (contractor and equipment not determined at this time); review with site inspector. List and describe BMPs: BMP C153 â€“ Material Delivery, Storage and Containment Installation Schedules: install at start of project Inspection frequency and Maintenance plan (identify both): daily, maintain as necessary Responsible Staff: General Contractor Will wheel wash or tire bath system BMPs be used during construction? Yes No A concrete washwater steel basin is required during concrete placement. List and describe BMPs: N/A Installation Schedules: N/A Inspection frequency and Maintenance plan (identify both): Responsible Staff: N/A Will pH-modifying sources be present on-site? Yes No Table 3 â€“ pH-Modifying Sources None Bulk cement Cement kiln dust Fly ash Other cementitious materials New concrete washing or curing waters Waste streams generated from concrete grinding and sawing Exposed aggregate processes Dewatering concrete vaults Concrete pumping and mixer washout waters Recycled concrete Recycled concrete stockpiles Other (i.e., calcium lignosulfate) [please describe: ] Not Applicable; no pH Modifying Sources List and describe BMPs: N/A Installation Schedules: N/A Inspection frequency and Maintenance plan (identify both): N/A Responsible Staff: N/A Concrete trucks must not be washed out onto the ground (including formed areas awaiting concrete per BMP C151) , or into storm drains, open ditches, streets, or streams. Excess concrete must not be dumped on-site, except in designated concrete washout areas with appropriate BMPs installed. Excess concrete must be returned to the plant for recycling if there are no concrete washout areas with appropriate BMPs installed. Will uncontaminated water from water-only based shaft drilling for construction of building, road, and bridge foundations be infiltrated provided the wastewater is managed in a way that prohibits discharge to surface waters? Yes No List and describe BMPs: N/A Installation Schedules: N/A Inspection frequency and Maintenance plan (identify both): N/A Responsible Staff: N/A Element 10: Control Dewatering (2.1.10) Not applicable; excavations will be minimal. Not expected encountering of groundwater. Table 4 â€“ Dewatering BMPs Infiltration Transport off-site in a vehicle (vacuum truck for legal disposal) Ecology-approved on-site chemical treatment or other suitable treatment technologies Sanitary or combined sewer discharge with local sewer district approval (last resort) Use of sedimentation bag with discharge to ditch or swale (small volumes of localized dewatering) List and describe BMPs: N/A Installation Schedules: N/A Inspection frequency and Maintenance plan (identify both): N/A Responsible Staff: N/A Element 11: Maintain BMPs (2.1.11) All temporary and permanent Erosion and Sediment Control (ESC) BMPs shall be maintained and repaired as needed to ensure continued performance of their intended function. Maintenance and repair shall be conducted in accordance with each particular BMP specification (see Volume II of the SWMMWW or Chapter 7 of the SWMMEW). Visual monitoring of all BMPs installed at the site will be conducted at least once every calendar week and within 24 hours of any stormwater or non-stormwater discharge from the site. If the site becomes inactive and is temporarily stabilized, the inspection frequency may be reduced to once every calendar month. All temporary ESC BMPs shall be removed within 30 days after final site stabilization is achieved or after the temporary BMPs are no longer needed. Trapped sediment shall be stabilized on-site or removed. Disturbed soil resulting from removal of either BMPs or vegetation shall be permanently stabilized. Additionally, protection must be provided for all BMPs installed for the permanent control of stormwater from sediment and compaction. BMPs that are to remain in place following completion of construction shall be examined and restored to full operating condition. If sediment enters these BMPs during construction, the sediment shall be removed and the facility shall be returned to conditions specified in the construction documents. Element 12: Manage the Project (2.1.12) The project will be managed based on the following principles: ï‚· Projects will be phased to the maximum extent practicable and seasonal work limitations will be taken into account. ï‚· Inspection and monitoring: o Inspection, maintenance and repair of all BMPs will occur as needed to ensure performance of their intended function. o Site inspections and monitoring will be conducted in accordance with Special Condition S4 of the CSWGP. Sampling locations are indicated on the Site Map. Sampling station(s) are located in accordance with applicable requirements of the CSWGP. ï‚· Maintain an updated SWPPP. o The SWPPP will be updated, maintained, and implemented in accordance with Special Conditions S3, S4, and S9 of the CSWGP. As site work progresses the SWPPP will be modified routinely to reflect changing site conditions. The SWPPP will be reviewed monthly to ensure the content is current. Table 5 â€“ Management Design the project to fit the existing topography, soils, and drainage patterns Emphasize erosion control rather than sediment control Minimize the extent and duration of the area exposed Keep runoff velocities low Retain sediment on-site Thoroughly monitor site and maintain all ESC measures Schedule major earthwork during the dry season Other (please describe) Table 6 â€“ BMP Implementation Schedule Phase of Construction Wet/Dry Stormwater BMPs Date Project Season [Insert construction [Insert BMP] [MM/DD/YYYY] [Insert activity] Season] Inlet Protection C220 02/01/2023 Wet Straw Wattle C235 02/01/2023 Wet Begin site clear/grading Maintain above BMPs 02/03/2023 Wet Site grading, utilities Maintain above BMPs 2/10/2023 Wet Begin trash enclosurse Maintain above BMPs 2/12/2023 Wet Begin paving & final Maintain above BMPs 2/24/2023 Wet stabilization Complete sitework and Remove above BMPs 02/28/2023 Wet remove BMPs Element 13: Protect Low Impact Development (LID) BMPs (2.1.13) No Low Impact Development (LID) BMPs are proposed with the exception of Post Construction Soil Quality and Depth Pollution Prevention Team (3.0) Table 7 â€“ Team Information Title Name(s) Phone Number Certified Erosion and Not Determined at this Time Sediment Control Lead (CESCL) or inspector Resident Engineer Pedro DeGuzman, PE (206) 795-9023 Emergency Ecology Contact Emergency Permittee/ Stillaguamish Square LP Owner Contact Non-Emergency Owner Steve Barnes (206) 682-5000 Contact Cornerstone Architectural Monitoring Personnel Ecology Regional Office Northwest Regional Office 206-594-0000 Monitoring and Sampling Requirements (4.0) Monitoring includes visual inspection, sampling for water quality parameters of concern, and documentation of the inspection and sampling findings in a site log book. A site log book will be maintained for all on-site construction activities and will include: ï‚· A record of the implementation of the SWPPP and other permit requirements ï‚· Site inspections ï‚· Stormwater sampling data File a blank form under Appendix D. The site log book must be maintained on-site within reasonable access to the site and be made available upon request to Ecology or the local jurisdiction. Numeric effluent limits may be required for certain discharges to 303(d) listed waterbodies. See CSWGP Special Condition S8 and Section 5 of this template. Complete the following paragraph for sites that discharge to impaired waterbodies for fine sediment, turbidity, phosphorus, or pH: The receiving waterbody, Hylebos Creek. Impairment: none known. All stormwater and dewatering discharges from the site are subject to an effluent limit of 8.5 su for pH and/or 25 NTU for turbidity. Site Inspection (4.1) Site inspections will be conducted at least once every calendar week and within 24 hours following any discharge from the site. For sites that are temporarily stabilized and inactive, the required frequency is reduced to once per calendar month. The discharge point(s) are indicated on the Site Map (see Appendix A) and in accordance with the applicable requirements of the CSWGP. Stormwater Quality Sampling (4.2) Turbidity Sampling (4.2.1) Requirements include calibrated turbidity meter or transparency tube to sample site discharges for compliance with the CSWGP. Sampling will be conducted at all discharge points at least once per calendar week. Method for sampling turbidity: Table 8 â€“ Turbidity Sampling Method Turbidity Meter/Turbidimeter (required for disturbances 5 acres or greater in size) x Transparency Tube (option for disturbances less than 1 acre and up to 5 acres in size) The benchmark for turbidity value is 25 nephelometric turbidity units (NTU) and a transparency less than 33 centimeters. If the dischargeâ€™s turbidity is 26 to 249 NTU or the transparency is less than 33 cm but equal to or greater than 6 cm, the following steps will be conducted: 1. Review the SWPPP for compliance with Special Condition S9. Make appropriate revisions within 7 days of the date the discharge exceeded the benchmark. 2. Immediately begin the process to fully implement and maintain appropriate source control and/or treatment BMPs as soon as possible. Address the problems within 10 days of the date the discharge exceeded the benchmark. If installation of necessary treatment BMPs is not feasible within 10 days, Ecology may approve additional time when the Permittee requests an extension within the initial 10-day response period. 3. Document BMP implementation and maintenance in the site log book. If the turbidity exceeds 250 NTU or the transparency is 6 cm or less at any time, the following steps will be conducted: 1. Telephone or submit an electronic report to the applicable Ecology Regionâ€™s Environmental Report Tracking System (ERTS) within 24 hours. https://www.ecology.wa.gov/About-us/Get-involved/Report-an-environmental-issue ï‚· Central Region (Benton, Chelan, Douglas, Kittitas, Klickitat, Okanogan, Yakima): (509) 575-2490 ï‚· Eastern Region (Adams, Asotin, Columbia, Ferry, Franklin, Garfield, Grant, Lincoln, Pend Oreille, Spokane, Stevens, Walla Walla, Whitman): (509) 329-3400 ï‚· Northwest Region (King, Kitsap, Island, San Juan, Skagit, Snohomish, Whatcom): (425) 649-7000 ï‚· Southwest Region (Clallam, Clark, Cowlitz, Grays Harbor, Jefferson, Lewis, Mason, Pacific, Pierce, Skamania, Thurston, Wahkiakum,): (360) 407-6300 2. Immediately begin the process to fully implement and maintain appropriate source control and/or treatment BMPs as soon as possible. Address the problems within 10 days of the date the discharge exceeded the benchmark. If installation of necessary treatment BMPs is not feasible within 10 days, Ecology may approve additional time when the Permittee requests an extension within the initial 10-day response period 3. Document BMP implementation and maintenance in the site log book. 4. Continue to sample discharges daily until one of the following is true: ï‚· Turbidity is 25 NTU (or lower). ï‚· Transparency is 33 cm (or greater). ï‚· Compliance with the water quality limit for turbidity is achieved. o 1 - 5 NTU over background turbidity, if background is less than 50 NTU o 1% - 10% over background turbidity, if background is 50 NTU or greater ï‚· The discharge stops or is eliminated. pH Sampling (4.2.2) pH monitoring is required for â€œSignificant concrete workâ€ (i.e. greater than 1000 cubic yards poured concrete or recycled concrete over the life of the project).The use of engineered soils (soil amendments including but not limited to Portland cement-treated base [CTB], cement kiln dust [CKD] or fly ash) also requires pH monitoring. For significant concrete work, pH sampling will start the first day concrete is poured and continue until it is cured, typically three (3) weeks after the last pour. For engineered soils and recycled concrete, pH sampling begins when engineered soils or recycled concrete are first exposed to precipitation and continues until the area is fully stabilized. If the measured pH is 8.5 or greater, the following measures will be taken: 1. Prevent high pH water from entering storm sewer systems or surface water. 2. Adjust or neutralize the high pH water to the range of 6.5 to 8.5 su using appropriate technology such as carbon dioxide (CO2) sparging (liquid or dry ice). 3. Written approval will be obtained from Ecology prior to the use of chemical treatment other than CO2 sparging or dry ice. Method for sampling pH: Table 8 â€“ pH Sampling Method pH meter x pH test kit Wide range pH indicator paper Discharges to 303(d) or Total Maximum Daily Load (TMDL) Waterbodies (5.0) 303(d) Listed Waterbodies (5.1) Is the receiving water 303(d) (Category 5) listed for turbidity, fine sediment, phosphorus, or pH? Yes No TMDL Waterbodies (5.2) Waste Load Allocation for CWSGP discharges: N/A Describe the method(s) for TMDL compliance: List and describe BMPs: N/A Discharges to TMDL receiving waterbodies will meet in-stream water quality criteria at the point of discharge. Reporting and Record Keeping (6.0) Record Keeping (6.1) Site Log Book (6.1.1) A site log book will be maintained for all on-site construction activities and will include: ï‚· A record of the implementation of the SWPPP and other permit requirements ï‚· Site inspections ï‚· Sample logs Records Retention (6.1.2) Records will be retained during the life of the project and for a minimum of three (3) years following the termination of permit coverage in accordance with Special Condition S5.C of the CSWGP. Permit documentation to be retained on-site: ï‚· CSWGP ï‚· Permit Coverage Letter ï‚· SWPPP ï‚· Site Log Book Permit documentation will be provided within 14 days of receipt of a written request from Ecology. A copy of the SWPPP or access to the SWPPP will be provided to the public when requested in writing in accordance with Special Condition S5.G.2.b of the CSWGP. Updating the SWPPP (6.1.3) The SWPPP will be modified if: ï‚· Found ineffective in eliminating or significantly minimizing pollutants in stormwater discharges from the site. ï‚· There is a change in design, construction, operation, or maintenance at the construction site that has, or could have, a significant effect on the discharge of pollutants to waters of the State. The SWPPP will be modified within seven (7) days if inspection(s) or investigation(s) determine additional or modified BMPs are necessary for compliance. An updated timeline for BMP implementation will be prepared. Reporting (6.2) Discharge Monitoring Reports (6.2.1) Cumulative soil disturbance is less than one (1) acre; therefore, Discharge Monitoring Reports (DMRs) will not be submitted to Ecology because water quality sampling is not being conducted at the site. Notification of Noncompliance (6.2.2) If any of the terms and conditions of the permit is not met, and the resulting noncompliance may cause a threat to human health or the environment, the following actions will be taken: 1. Ecology will be notified within 24-hours of the failure to comply by calling the applicable Regional office ERTS phone number (Regional office numbers listed below). 2. Immediate action will be taken to prevent the discharge/pollution or otherwise stop or correct the noncompliance. If applicable, sampling and analysis of any noncompliance will be repeated immediately and the results submitted to Ecology within five (5) days of becoming aware of the violation. 3. A detailed written report describing the noncompliance will be submitted to Ecology within five (5) days, unless requested earlier by Ecology. Anytime turbidity sampling indicates turbidity is 250 NTUs or greater, or water transparency is 6 cm or less, the Ecology Regional office will be notified by phone within 24 hours of analysis as required by Special Condition S5.A of the CSWGP. ï‚· Central Region at (509) 575-2490 for Benton, Chelan, Douglas, Kittitas, Klickitat, Okanogan, or Yakima County ï‚· Eastern Region at (509) 329-3400 for Adams, Asotin, Columbia, Ferry, Franklin, Garfield, Grant, Lincoln, Pend Oreille, Spokane, Stevens, Walla Walla, or Whitman County ï‚· Northwest Region at (425) 649-7000 for Island, King, Kitsap, San Juan, Skagit, Snohomish, or Whatcom County ï‚· Southwest Region at (360) 407-6300 for Clallam, Clark, Cowlitz, Grays Harbor, Jefferson, Lewis, Mason, Pacific, Pierce, Skamania, Thurston, or Wahkiakum Include the following information: 1. Your name and / Phone number 2. Permit number 3. City / County of project 4. Sample results 5. Date / Time of call 6. Date / Time of sample 7. Project name In accordance with Special Condition S4.D.5.b of the CSWGP, the Ecology Regional office will be notified if chemical treatment other than CO2 sparging is planned for adjustment of high pH water. Appendix/Glossary A. Site Map See attached Sheets C1.1 & C1.4 STILLAGUAMISH SQUARE - PARKING EXPANSION LEGEND SW1/4 OF SEC. 2, T31N, R5E, W.M., SNOHOMISH COUNTY, WA PROPERTY INFO CALL AT LEAST 2 WORKING DAYS BEFORE YOU DIG CALL '811' VICINITY MAP DATE PROJECT TEAM REFER TO ARCHITECTURAL PLANS FOR REVISION SITE HORIZONTAL CONTROL AND ON-SITE SURFACE DETAILS (I.E. CURBS, WALKWAYS, STRIPING, SIGNAGE, ETC.) NO GOVERNING AGENCIES WEST AVENUE ORMA F PROJECT DATA ERRA T DESIGN GROUP, INC. LIMITS OF CLEARING PROJECT NO. & GRADING DRAWN BY: CHECKED BY: SHEET INDEX LIMITS OF CLEARING & GRADING 5TH STREET LIMITS OF CLEARING & GRADING DIVISION STREET STILLAGUAMISH SQUARE - PARKING EXPANSION SHEET TITLE CITY OF ARLINGTON TESC PLAN CONSTRUCTION DRAWING REVIEW APPROVAL THE PLAN SHEET HAS BEEN REVIEWED AND APPROVED PER THE CONDITIONS OF THIS TITLE SHEET. SHEET NO. STATE ROUTE 9 BY: Development Services Manager DATE: THIS APPROVAL IS VALID FOR 19 MONTHS C1.1 STILLAGUAMISH SQUARE - PARKING EXPANSION SW1/4 OF SEC. 2, T31N, R5E, W.M., SNOHOMISH COUNTY, WA CITY OF ARLINGTON TESC NOTES TESC CONSTRUCTION SEQUENCE DATE FOR EXISTING AND NEW CATCH BASINS â€™ CB INLET FILTER (BMP C220) HOT-MIX ASPHALT SECTION REVISION NO ORMA â€™ STRAW WATTLE (BMP C235) F TEMPORARY HYDROSEED MIXTURE ERRA T DESIGN GROUP, INC. PROJECT NO. DRAWN BY: â€œ â€ CHECKED BY: â€œ â€ â€œ â€ CONCRETE HANDLING NOTES â€™ â€œ â€ â€™ â€œ â€ STILLAGUAMISH SQUARE - PARKING EXPANSION SHEET TITLE POST-CONSTRUCTION SOIL QUALITY & DEPTH CITY OF ARLINGTON CIVIL DETAILS CONSTRUCTION DRAWING REVIEW APPROVAL & NOTES THE PLAN SHEET HAS BEEN REVIEWED AND APPROVED PER THE CONDITIONS OF THIS TITLE SHEET. SHEET NO. BY: Development Services Manager DATE: THIS APPROVAL IS VALID FOR 19 MONTHS C1.4 A. BMP Detail See attached applicable BMPs. II-3 Construction Stormwater BMPs II-3.1 A Summary of Construction Stormwater BMPs This chapter contains standards and specifications for temporary BMPs, used as appropriate during the construction phase of a project. Often using BMPs in combination is the best method to meet Construction Stormwater Pollution Prevention Plan (Construction SWPPP) requirements. The standards and specifications in this chapter are not intended to limit innovative efforts to effect- ively control erosion and sedimentation. Construction SWPPPs can contain experimental BMPs or make minor modifications to standard BMPs. However, the permitting authority (state, local, or both) must approve such practices before use. Experimental and modified BMPs must achieve the same or better performance than the BMPs listed below. None of the BMPs listed below will work successfully throughout the construction project without inspection and maintenance. Regular inspections to identify problems with the operation of each BMP, and the timely repair of any problems are essential to the continued operation of the BMPs. As site conditions change, BMPs must change to remain in compliance. Construction stormwater BMPs are divided into two categories: Construction Source Control BMPs and Construction Runoff BMPs. Table II-3.1: Construction Stormwater BMPs by SWPPP Element shows the relationship of the Con- struction Stormwater BMPs to the Construction SWPPP Elements described in I-3.4.2 MR2: Con- struction Stormwater Pollution Prevention Plan (SWPPP). Table II-3.1: Construction Stormwater BMPs by SWPPP Element Construction SWPPP Element # Construction Storm- water BMP #1 #2 #3 #4 #5 #6 #7 #8 #9 #10 #11 #12 #13 Construction Source Control BMPs BMP C101: Preserving Ã¼ Natural Vegetation BMP C102: Buffer Zones Ã¼ Ã¼ BMP C103: High-Vis- ibility Fence Ã¼ Ã¼ BMP C105: Stabilized Ã¼ Construction Access BMP C106: Wheel Ã¼ Wash 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page267 Table II-3.1: Construction Stormwater BMPs by SWPPP Element (continued) Construction SWPPP Element # Construction Storm- water BMP #1 #2 #3 #4 #5 #6 #7 #8 #9 #10 #11 #12 #13 BMP C107: Con- struction Road / Parking Ã¼ Area Stabilization BMP C120: Temporary and Permanent Seeding Ã¼ Ã¼ BMP C121: Mulching Ã¼ Ã¼ BMP C122: Nets and Blankets Ã¼ Ã¼ Ã¼ BMP C123: Plastic Covering Ã¼ Ã¼ BMP C124: Sodding Ã¼ Ã¼ BMP C125: Topsoiling / Ã¼ Composting BMP C126: Poly- acrylamide (PAM) for Ã¼ Soil Erosion Protection BMP C130: Surface Roughening Ã¼ Ã¼ BMP C131: Gradient Terraces Ã¼ Ã¼ BMP C140: Dust Con- Ã¼ trol BMP C150: Mater- Ã¼ Ã¼ ials on Hand BMP C151: Concrete Ã¼ Handling BMP C152: Sawcutting and Surfacing Pollution Ã¼ Prevention BMP C153: Material Delivery, Storage, and Ã¼ Containment 2019Stormwater ManagementManualfor WesternWashington VolumeII- Chapter 3- Page268 Table II-3.1: Construction Stormwater BMPs by SWPPP Element (continued) Construction SWPPP Element # Construction Storm- water BMP #1 #2 #3 #4 #5 #6 #7 #8 #9 #10 #11 #12 #13 BMP C154: Concrete Ã¼ Washout Area BMP C160: Certified Erosion and Sediment Ã¼ Ã¼ Control Lead BMP C162: Scheduling Ã¼ Construction Runoff BMPs BMP C200: Interceptor Dike and Swale Ã¼ Ã¼ BMP C201: Grass- Lined Channels Ã¼ Ã¼ BMP C202: Riprap Ã¼ Channel Lining BMP C203: Water Bars Ã¼ Ã¼ Ã¼ BMP C204: Pipe Slope Ã¼ Drains BMP C205: Subsurface Ã¼ Drains BMP C206: Level Spreader Ã¼ Ã¼ BMP C207: Check Dams Ã¼ Ã¼ Ã¼ Ã¼ BMP C208: Triangular Silt Dike (TSD) Ã¼ Ã¼ BMP C209: Outlet Pro- tection Ã¼ Ã¼ BMP C220: Inlet Pro- Ã¼ tection BMP C231: Brush Bar- rier Ã¼ Ã¼ BMP C232: Gravel Fil- Ã¼ ter Berm 2019Stormwater ManagementManualfor WesternWashington VolumeII- Chapter 3- Page269 Table II-3.1: Construction Stormwater BMPs by SWPPP Element (continued) Construction SWPPP Element # Construction Storm- water BMP #1 #2 #3 #4 #5 #6 #7 #8 #9 #10 #11 #12 #13 BMP C233: Silt Fence Ã¼ Ã¼ BMP C234: Vegetated Strip Ã¼ Ã¼ BMP C235: Wattles Ã¼ Ã¼ BMP C236: Vegetative Ã¼ Filtration BMP C240: Sediment Trap Ã¼ Ã¼ BMP C241: Sediment Pond (Temporary) Ã¼ Ã¼ BMP C250: Con- struction Stormwater Ã¼ Ã¼ Chemical Treatment BMP C251: Con- struction Stormwater Ã¼ Ã¼ Filtration BMP C252: Treating and Disposing of High Ã¼ pH Water Construction SWPPP Elements: Element 1: Preserve Vegetation / Mark Clearing Limits Element 2: Establish Construction Access Element 3: Control Flow Rates Element 4: Install Sediment Controls Element 5: Stabilize Soils Element 6: Protect Slopes Element 7: Protect Drain Inlets Element 8: Stabilize Channels and Outlets Element 9: Control Pollutants Element 10: Control Dewatering Element 11: Maintain BMPs Element 12: Manage the Project Element 13: Protect Low Impact Development BMPs II-3.2 Construction Source Control BMPs 2019Stormwater ManagementManualfor WesternWashington VolumeII- Chapter 3- Page270 Crushed rock, gravel base, etc., shall be added as required to maintain a stable driving surface and to stabilize any areas that have eroded. Following construction, these areas shall be restored to pre-construction condition or better to pre- vent future erosion. Perform street cleaning at the end of each day or more often if necessary. BMP C120: Temporary and Permanent Seeding Purpose Seeding reduces erosion by stabilizing exposed soils. A well-established vegetative cover is one of the most effective methods of reducing erosion. Conditions of Use Use seeding throughout the project on disturbed areas that have reached final grade or that will remain unworked for more than 30 days. The optimum seeding windows for western Washington are April 1 through June 30 and September 1 through October 1. Between July 1 and August 30 seeding requires irrigation until 75 percent grass cover is established. Between October 1 and March 30 seeding requires a cover of mulch or an erosion control blanket until 75 percent grass cover is established. Review all disturbed areas in late August to early September and complete all seeding by the end of September. Otherwise, vegetation will not establish itself enough to provide more than average pro- tection. Mulch is required at all times for seeding because it protects seeds from heat, moisture loss, and transport due to runoff. Mulch can be applied on top of the seed or simultaneously by hydroseeding. See BMP C121: Mulching for specifications. Seed and mulch all disturbed areas not otherwise vegetated at final site stabilization. Final sta- bilization means the completion of all soil disturbing activities at the site and the establishment of a permanent vegetative cover, or equivalent permanent stabilization measures (such as pavement, riprap, gabions, or geotextiles) which will prevent erosion. See BMP T5.13: Post-Construction Soil Quality and Depth. Design and Installation Specifications General l Install channels intended for vegetation before starting major earthwork and hydroseed with a Bonded Fiber Matrix. For vegetated channels that will have high flows, install erosion control blankets over the top of hydroseed. Before allowing water to flow in vegetated channels, establish 75 percent vegetation cover. If vegetated channels cannot be established by seed 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page284 before water flow; install sod in the channel bottom â€” over top of hydromulch and erosion con- trol blankets. l Confirm the installation of all required surface water control measures to prevent seed from washing away. l Hydroseed applications shall include a minimum of 1,500 pounds per acre of mulch with 3 per- cent tackifier. See BMP C121: Mulching for specifications. l Areas that will have seeding only and not landscaping may need compost or meal-based mulch included in the hydroseed in order to establish vegetation. Re-install native topsoil on the disturbed soil surface before application. See BMP T5.13: Post-Construction Soil Quality and Depth. l When installing seed via hydroseeding operations, only about 1/3 of the seed actually ends up in contact with the soil surface. This reduces the ability to establish a good stand of grass quickly. To overcome this, consider increasing seed quantities by up to 50 percent. l Enhance vegetation establishment by dividing the hydromulch operation into two phases: o Phase 1- Install all seed and fertilizer with 25-30 percent mulch and tackifier onto soil in the first lift. o Phase 2- Install the rest of the mulch and tackifier over the first lift. Or, enhance vegetation by: o Installing the mulch, seed, fertilizer, and tackifier in one lift. o Spread or blow straw over the top of the hydromulch at a rate of 800-1000 pounds per acre. o Hold straw in place with a standard tackifier. Both of these approaches will increase cost moderately but will greatly improve and enhance vegetative establishment. The increased cost may be offset by the reduced need for: o Irrigation. o Reapplication of mulch. o Repair of failed slope surfaces. This technique works with standard hydromulch (1,500 pounds per acre minimum) and Bon- ded Fiber Matrix/ Mechanically Bonded Fiber Matrix (BFM/MBFMs) (3,000 pounds per acre minimum). l Seed may be installed by hand if: o Temporary and covered by straw, mulch, or topsoil. o Permanent in small areas (usually less than 1 acre) and covered with mulch, topsoil, or erosion blankets. l The seed mixes listed in Table II-3.4: Temporary and Permanent Seed Mixes include 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page285 recommended mixes for both temporary and permanent seeding. l Apply these mixes, with the exception of the wet area seed mix, at a rate of 120 pounds per acre. This rate can be reduced if soil amendments or slow-release fertilizers are used. Apply the wet area seed mix at a rate of 60 pounds per acre. l Consult the local suppliers or the local conservation district for their recommendations. The appropriate mix depends on a variety of factors, including location, exposure, soil type, slope, and expected foot traffic. Alternative seed mixes approved by the local authority may be used, depending on the soil type and hydrology of the area. Table II-3.4: Temporary and Permanent Seed Mixes Common Name Latin Name % Weight % Purity % Germination Temporary Erosion Control Seed Mix A standard mix for areas requiring a temporary vegetative cover. Festuca rubra var. Chewings or commutata or Poa 40 98 90 annual blue grass anna Perennial ryeÂ Lolium perenne 50 98 90 Redtop or colonial Agrostis alba or 5 92 85 bentgrass Agrostis tenuis White dutch clover Trifolium repens 5 98 90 Landscaping Seed Mix A recommended mix for landscaping seed. Perennial rye blend Lolium perenne 70 98 90 Festuca rubra var. Chewings and red commutata or Fes- 30 98 90 fescue blend tuca rubra Low-Growing Turf Seed Mix A turf seed mix for dry situations where there is no need for watering. This mix requires very little main- tenance. Dwarf tall fescue Festuca arundin- 45 98 90 (several varieties) acea var. Dwarf perennial Lolium perenne 30 98 90 rye (Barclay) var. barclay Red fescue Festuca rubra 20 98 90 Colonial bentgrass Agrostis tenuis 5 98 90 Bioswale Seed Mix A seed mix for bioswales and other intermittently wet areas. Tall or meadow fes- Festuca arundin- 75-80 98 90 2019Stormwater ManagementManualfor WesternWashington VolumeII- Chapter 3- Page286 Table II-3.4: Temporary and Permanent Seed Mixes (continued) Common Name Latin Name % Weight % Purity % Germination acea or Festuca cue elatior Seaside/Creeping Agrostis palustris 10-15 92 85 bentgrass Agrostis alba or Redtop bentgrass 5-10 90 80 Agrostis gigantea Wet Area Seed Mix A low-growing, relatively non-invasive seed mix appropriate for very wet areas that are not regulated wet- lands. Consult Hydraulic Permit Authority (HPA) for seed mixes if applicable. Festuca arundin- Tall or meadow fes- acea or Festuca 60-70 98 90 cue elatior Seaside/Creeping Agrostis palustris 10-15 98 85 bentgrass Alepocurus praten- Meadow foxtail 10-15 90 80 sis Alsike clover Trifolium hybridum 1-6 98 90 Redtop bentgrass Agrostis alba 1-6 92 85 Meadow Seed Mix A recommended meadow seed mix for infrequently maintained areas or non-maintained areas where col- onization by native plants is desirable. Likely applications include rural road and utility right-of-way. Seed- ing should take place in September or very early October in order to obtain adequate establishment prior to the winter months. Consider the appropriateness of clover, a fairly invasive species, in the mix. Amending the soil can reduce the need for clover. Agrostis alba or Redtop or Oregon Agrostis ore- 20 92 85 bentgrass gonensis Red fescue Festuca rubra 70 98 90 White dutch clover Trifolium repens 10 98 90 Roughening and Rototilling l The seedbed should be firm and rough. Roughen all soil no matter what the slope. Track walk slopes before seeding if engineering purposes require compaction. Backblading or smoothing of slopes greater than 4H:1V is not allowed if they are to be seeded. l Restoration-based landscape practices require deeper incorporation than that provided by a simple single-pass rototilling treatment. Wherever practical, initially rip the subgrade to improve long-term permeability, infiltration, and water inflow qualities. At a minimum, 2019Stormwater ManagementManualfor WesternWashington VolumeII- Chapter 3- Page287 permanent areas shall use soil amendments to achieve organic matter and permeability per- formance defined in engineered soil/landscape systems. For systems that are deeper than 8 inches complete the rototilling process in multiple lifts, or prepare the engineered soil system per specifications and place to achieve the specified depth. Fertilizers l Conducting soil tests to determine the exact type and quantity of fertilizer is recommended. This will prevent the over-application of fertilizer. l Organic matter is the most appropriate form of fertilizer because it provides nutrients (includ- ing nitrogen, phosphorus, and potassium) in the least water-soluble form. l In general, use 10-4-6 N-P-K (nitrogen-phosphorus-potassium) fertilizer at a rate of 90 pounds per acre. Always use slow-release fertilizers because they are more efficient and have fewer environmental impacts. Do not add fertilizer to the hydromulch machine, or agit- ate, more than 20 minutes before use. Too much agitation destroys the slow-release coating. l There are numerous products available that take the place of chemical fertilizers. These include several with seaweed extracts that are beneficial to soil microbes and organisms. If 100 percent cottonseed meal is used as the mulch in hydroseed, chemical fertilizer may not be necessary. Cottonseed meal provides a good source of long-term, slow-release, available nitrogen. Bonded Fiber Matrix and Mechanically Bonded Fiber Matrix l On steep slopes use Bonded Fiber Matrix (BFM) or Mechanically Bonded Fiber Matrix (MBFM) products. Apply BFM/MBFM products at a minimum rate of 3,000 pounds per acre with approximately 10 percent tackifier. Achieve a minimum of 95 percent soil coverage during application. Numerous products are available commercially. Most products require 24-36 hours to cure before rainfall and cannot be installed on wet or saturated soils. Generally, products come in 40-50 pound bags and include all necessary ingredients except for seed and fertilizer. l Install products per manufacturer's instructions. l BFMs and MBFMs provide good alternatives to blankets in most areas requiring vegetation establishment. Advantages over blankets include: o BFM and MBFMs do not require surface preparation. o Helicopters can assist in installing BFM and MBFMs in remote areas. o On slopes steeper than 2.5H:1V, blanket installers may require ropes and harnesses for safety. o Installing BFM and MBFMs can save at least $1,000 per acre compared to blankets. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page288 Maintenance Standards Reseed any seeded areas that fail to establish at least 75 percent cover (100 percent cover for areas that receive sheet or concentrated flows). If reseeding is ineffective, use an alternate method such as sodding, mulching, nets, or blankets. l Reseed and protect by mulch any areas that experience erosion after achieving adequate cover. Reseed and protect by mulch any eroded area. l Supply seeded areas with adequate moisture, but do not water to the extent that it causes run- off. Approved as Functionally Equivalent Ecology has approved products as able to meet the requirements of this BMP. The products did not pass through the Technology Assessment Protocol â€“ Ecology (TAPE) process. Local jurisdictions may choose not to accept these products, or may require additional testing prior to consideration for local use. Products that Ecology has approved as functionally equivalent are available for review on Ecologyâ€™s website at: https://ecology.wa.gov/Regulations-Permits/Guidance-technical-assistance/Stormwater-per- mittee-guidance-resources/Emerging-stormwater-treatment-technologies BMP C121: Mulching Purpose Mulching soils provides immediate temporary protection from erosion. Mulch also enhances plant establishment by conserving moisture, holding fertilizer, seed, and topsoil in place, and moderating soil temperatures. There are a variety of mulches that can be used. This section discusses only the most common types of mulch. Conditions of Use As a temporary cover measure, mulch should be used: l For less than 30 days on disturbed areas that require cover. l At all times for seeded areas, especially during the wet season and during the hot summer months. l During the wet season on slopes steeper than 3H:1V with more than 10 feet of vertical relief. Mulch may be applied at any time of the year and must be refreshed periodically. For seeded areas, mulch may be made up of 100 percent: l cottonseed meal; l fibers made of wood, recycled cellulose, hemp, or kenaf; 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page289 l compost; l or blends of these. Tackifier shall be plant-based, such as guar or alpha plantago, or chemical-based such as poly- acrylamide or polymers. Generally, mulches come in 40-50 pound bags. Seed and fertilizer are added at time of application. Recycled cellulose may contain polychlorinated biphenyl (PCBs). Ecology recommends that products should be evaluated for PCBs prior to use. Refer to BMP C126: Polyacrylamide (PAM) for Soil Erosion Protection for conditions of use. PAM shall not be directly applied to water or allowed to enter a water body. Any mulch or tackifier product used shall be installed per the manufacturerâ€™s instructions. Design and Installation Specifications For mulch materials, application rates, and specifications, see Table II-3.6: Mulch Standards and Guidelines. Consult with the local supplier or the local conservation district for their recom- mendations. Increase the application rate until the ground is 95% covered (i.e. not visible under the mulch layer). Note: Thickness may be increased for disturbed areas in or near sensitive areas or other areas highly susceptible to erosion. Where the option of â€œCompostâ€ is selected, it should be a coarse compost that meets the size grad- ations listed in Table II-3.5: Size Gradations of Compost as Mulch Material when tested in accord- ance with Test Method 02.02-B found in Test Methods for the Examination of Composting and Compost (Thompson, 2001). Table II-3.5: Size Gradations of Compost as Mulch Material Sieve Size Percent Passing 3" 100% 1" 90% - 100% 3/4" 70% - 100% 1/4" 40% - 100% Mulch used within the ordinary high-water mark of surface waters should be selected to minimize potential flotation of organic matter. Composted organic materials have higher specific gravities (densities) than straw, wood, or chipped material. Consult the Hydraulic Permit Authority (HPA) for mulch mixes if applicable. Maintenance Standards The thickness of the mulch cover must be maintained. Any areas that experience erosion shall be remulched and/or protected with a net or blanket. If the erosion problem is drainage related, then the problem shall be fixed and the eroded area remulched. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page290 Table II-3.6: Mulch Standards and Guidelines Mulch Mater- Guideline Description ial Quality Air-dried; free from undesirable seed and coarse material. Standards Application 2"-3" thick; 5 bales per 1,000 sf or 2-3 tons per acre Rates Cost-effective protection when applied with adequate thickness. Hand- application generally requires greater thickness than blown straw. The thickness of straw may be reduced by half when used in conjunction with Straw seeding. In windy areas straw must be held in place by crimping, using a tackifier, or covering with netting. Blown straw always has to be held in Remarks place with a tackifier as even light winds will blow it away. Straw, however, has several deficiencies that should be considered when selecting mulch materials. It often introduces and/or encourages the propagation of weed species and it has no significant long-term benefits It should also not be used within the ordinary high-water elevation of surface waters (due to flot- ation). Quality No growth inhibiting factors. Standards Application Approx. 35-45 lbs per 1,000 sf or 1,500 - 2,000 lbs per acre Rates Hydromulch Shall be applied with hydromulcher. Shall not be used without seed and tackifier unless the application rate is at least doubled. Fibers longer than Remarks about 3/4 - 1 inch clog hydromulch equipment. Fibers should be kept to less than 3/4 inch. Quality No visible water or dust during handling. Must be produced per WAC 173- Standards 350, Solid Waste Handling Standards, but may have up to 35% biosolids. Application 2" thick min.; approx. 100 tons per acre (approx. 750 lbs per cubic yard) Rates More effective control can be obtained by increasing thickness to 3". Excel- Compost lent mulch for protecting final grades until landscaping because it can be dir- ectly seeded or tilled into soil as an amendment. Compost used for mulch has a coarser size gradation than compost used for BMP C125: Topsoiling Remarks / Composting or BMP T5.13: Post-Construction Soil Quality and Depth. It is more stable and practical to use in wet areas and during rainy weather conditions. Do not use near wetlands or near phosphorous impaired water bodies. Gradations from fines to 6 inches in length for texture, variation, and inter- Quality Chipped locking properties. Include a mix of various sizes so that the average size Standards Site Veget- is between 2- and 4- inches. ation Application 2" thick min.; Rates 2019Stormwater ManagementManualfor WesternWashington VolumeII- Chapter 3- Page291 Table II-3.6: Mulch Standards and Guidelines (continued) Mulch Mater- Guideline Description ial This is a cost-effective way to dispose of debris from clearing and grub- bing, and it eliminates the problems associated with burning. Generally, it should not be used on slopes above approx. 10% because of its tendency to be transported by runoff. It is not recommended within 200 feet of sur- Remarks face waters. If permanent seeding or planting is expected shortly after mulch, the decomposition of the chipped vegetation may tie up nutrients important to grass establishment. Note: thick application of this material over existing grass, herbaceous spe- cies, and some groundcovers could smother and kill vegetation. No visible water or dust during handling. Must be purchased from a supplier Quality with a Solid Waste Handling Permit or one exempt from solid waste reg- Standards ulations. Application 2" thick min.; approx. 100 tons per acre (approx. 750 lbs. per cubic yard) Wood- Rates Based This material is often called "wood straw" or "hog fuel". The use of mulch Mulch ultimately improves the organic matter in the soil. Special caution is advised regarding the source and composition of wood-based mulches. Its Remarks preparation typically does not provide any weed seed control, so evidence of residual vegetation in its composition or known inclusion of weed plants or seeds should be monitored and prevented (or minimized). Quality A blend of loose, long, thin wood pieces derived from native conifer or Standards deciduous trees with high length-to-width ratio. Application 2" thick min. Rates Wood Cost-effective protection when applied with adequate thickness. A min- Strand imum of 95-percent of the wood strand shall have lengths between 2 and Mulch 10-inches, with a width and thickness between 1/16 and 1/2-inches. The Remarks mulch shall not contain resin, tannin, or other compounds in quantities that would be detrimental to plant life. Sawdust or wood shavings shall not be used as mulch. [Specification 9-14.4(4) from the Standard Specifications for Road, Bridge, and Municipal Construction (WSDOT, 2016) BMP C122: Nets and Blankets Purpose Erosion control nets and blankets are intended to prevent erosion and hold seed and mulch in place on steep slopes and in channels so that vegetation can become well established. In addition, some nets and blankets can be used to permanently reinforce turf to protect drainage ways during high flows. 2019Stormwater ManagementManualfor WesternWashington VolumeII- Chapter 3- Page292 compliance with this BMP. l Use vacuum street sweepers. l Remove mud and other dirt promptly so it does not dry and then turn into dust. l Techniques that can be used for unpaved roads and lots include: o Lower speed limits. High vehicle speed increases the amount of dust stirred up from unpaved roads and lots. o Upgrade the road surface strength by improving particle size, shape, and mineral types that make up the surface and base materials. o Add surface gravel to reduce the source of dust emission. Limit the amount of fine particles (those smaller than .075 mm) to 10 to 20 percent. o Use geotextile fabrics to increase the strength of new roads or roads undergoing recon- struction. o Encourage the use of alternate, paved routes, if available. o Apply chemical dust suppressants using the admix method, blending the product with the top few inches of surface material. Suppressants may also be applied as surface treatments. o Limit dust-causing work on windy days. o Pave unpaved permanent roads and other trafficked areas. Maintenance Standards Respray area as necessary to keep dust to a minimum. BMP C150: Materials on Hand Purpose Keep quantities of erosion prevention and sediment control materials on the project site at all times to be used for regular maintenance and emergency situations such as unexpected heavy rains. Hav- ing these materials on-site reduces the time needed to replace existing or implement new BMPs when inspections indicate that existing BMPs are not meeting the Construction SWPPP require- ments. In addition, contractors can save money by buying some materials in bulk and storing them at their office or yard. Conditions of Use l Construction projects of any size or type can benefit from having materials on hand. A small commercial development project could have a roll of plastic and some gravel available for immediate protection of bare soil and temporary berm construction. A large earthwork project, such as highway construction, might have several tons of straw, several rolls of plastic, flexible 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page314 pipe, sandbags, geotextile fabric and steel â€œTâ€ posts. l Materials should be stockpiled and readily available before any site clearing, grubbing, or earthwork begins. A large contractor or project proponent could keep a stockpile of materials that are available for use on several projects. l If storage space at the project site is at a premium, the contractor could maintain the materials at their office or yard. The office or yard must be less than an hour from the project site. Design and Installation Specifications Depending on project type, size, complexity, and length, materials and quantities will vary. A good minimum list of items that will cover numerous situations includes: l Clear Plastic, 6 mil l Drainpipe, 6 or 8 inch diameter l Sandbags, filled l Straw Bales for mulching l Quarry Spalls l Washed Gravel l Geotextile Fabric l Catch Basin Inserts l Steel "T" Posts l Silt fence material l Straw Wattles Maintenance Standards l All materials with the exception of the quarry spalls, steel â€œTâ€ posts, and gravel should be kept covered and out of both sun and rain. l Re-stock materials as needed. BMP C151: Concrete Handling Purpose Concrete work can generate process water and slurry that contain fine particles and high pH, both of which can violate water quality standards in the receiving water. Concrete spillage or concrete dis- charge to waters of the State is prohibited. Use this BMP to minimize and eliminate concrete, con- crete process water, and concrete slurry from entering waters of the State. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page315 Conditions of Use Any time concrete is used, utilize these management practices. Concrete construction project com- ponents include, but are not limited to: l Curbs l Sidewalks l Roads l Bridges l Foundations l Floors l Runways Disposal options for concrete, in order of preference are: 1. Off-site disposal 2. Concrete wash-out areas (see BMP C154: Concrete Washout Area) 3. De minimus washout to formed areas awaiting concrete Design and Installation Specifications l Wash concrete truck drums at an approved off-site location or in designated concrete washout areas only. Do not wash out concrete trucks onto the ground (including formed areas awaiting concrete), or into storm drains, open ditches, streets, or streams. Refer to BMP C154: Concrete Washout Area for information on concrete washout areas. o Return unused concrete remaining in the truck and pump to the originating batch plant for recycling. Do not dump excess concrete on site, except in designated concrete washout areas as allowed in BMP C154: Concrete Washout Area. l Wash small concrete handling equipment (e.g. hand tools, screeds, shovels, rakes, floats, trowels, and wheelbarrows) into designated concrete washout areas or into formed areas awaiting concrete pour. l At no time shall concrete be washed off into the footprint of an area where an infiltration fea- ture will be installed. l Wash equipment difficult to move, such as concrete paving machines, in areas that do not dir- ectly drain to natural or constructed stormwater conveyance or potential infiltration areas. l Do not allow washwater from areas, such as concrete aggregate driveways, to drain directly (without detention or treatment) to natural or constructed stormwater conveyances. l Contain washwater and leftover product in a lined container when no designated concrete washout areas (or formed areas, allowed as described above) are available. Dispose of con- tained concrete and concrete washwater (process water) properly. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page316 l Always use forms or solid barriers for concrete pours, such as pilings, within 15-feet of surface waters. l Refer to BMP C252: Treating and Disposing of High pH Water for pH adjustment require- ments. l Refer to the Construction Stormwater General Permit (CSWGP) for pH monitoring require- ments if the project involves one of the following activities: o Significant concrete work (as defined in the CSWGP). o The use of soils amended with (but not limited to) Portland cement-treated base, cement kiln dust or fly ash. o Discharging stormwater to segments of water bodies on the 303(d) list (Category 5) for high pH. Maintenance Standards Check containers for holes in the liner daily during concrete pours and repair the same day. BMP C152: Sawcutting and Surfacing Pollution Prevention Purpose Sawcutting and surfacing operations generate slurry and process water that contains fine particles and high pH (concrete cutting), both of which can violate the water quality standards in the receiving water. Concrete spillage or concrete discharge to waters of the State is prohibited. Use this BMP to minimize and eliminate process water and slurry created through sawcutting or surfacing from enter- ing waters of the State. Conditions of Use Utilize these management practices anytime sawcutting or surfacing operations take place. Saw- cutting and surfacing operations include, but are not limited to: l Sawing l Coring l Grinding l Roughening l Hydro-demolition l Bridge and road surfacing 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page317 Design and Installation Specifications l Vacuum slurry and cuttings during cutting and surfacing operations. l Slurry and cuttings shall not remain on permanent concrete or asphalt pavement overnight. l Slurry and cuttings shall not drain to any natural or constructed drainage conveyance includ- ing stormwater systems. This may require temporarily blocking catch basins. l Dispose of collected slurry and cuttings in a manner that does not violate ground water or sur- face water quality standards. l Do not allow process water generated during hydro-demolition, surface roughening or similar operations to drain to any natural or constructed drainage conveyance including stormwater systems. Dispose of process water in a manner that does not violate ground water or surface water quality standards. l Handle and dispose of cleaning waste material and demolition debris in a manner that does not cause contamination of water. Dispose of sweeping material from a pick-up sweeper at an appropriate disposal site. Maintenance Standards Continually monitor operations to determine whether slurry, cuttings, or process water could enter waters of the state. If inspections show that a violation of water quality standards could occur, stop operations and immediately implement preventive measures such as berms, barriers, secondary containment, and/or vacuum trucks. BMP C153: Material Delivery, Storage, and Containment Purpose Prevent, reduce, or eliminate the discharge of pollutants to the stormwater system or watercourses from material delivery and storage. Minimize the storage of hazardous materials on-site, store mater- ials in a designated area, and install secondary containment. Conditions of Use Use at construction sites with delivery and storage of the following materials: l Petroleum products such as fuel, oil and grease l Soil stabilizers and binders (e.g., Polyacrylamide) l Fertilizers, pesticides and herbicides l Detergents l Asphalt and concrete compounds 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page318 l Hazardous chemicals such as acids, lime, adhesives, paints, solvents, and curing compounds l Any other material that may be detrimental if released to the environment Design and Installation Specifications l The temporary storage area should be located away from vehicular traffic, near the con- struction entrance(s), and away from waterways or storm drains. l Safety Data Sheets (SDS) should be supplied for all materials stored. Chemicals should be kept in their original labeled containers. l Hazardous material storage on-site should be minimized. l Hazardous materials should be handled as infrequently as possible. l During the wet weather season (Oct 1 â€“ April 30), consider storing materials in a covered area. l Materials should be stored in secondary containments, such as an earthen dike, horse trough, or even a childrenâ€™s wading pool for non-reactive materials such as detergents, oil, grease, and paints. Small amounts of material may be secondarily contained in â€œbus boyâ€ trays or con- crete mixing trays. l Do not store chemicals, drums, or bagged materials directly on the ground. Place these items on a pallet and, when possible, within secondary containment. l If drums must be kept uncovered, store them at a slight angle to reduce ponding of rainwater on the lids to reduce corrosion. Domed plastic covers are inexpensive and snap to the top of drums, preventing water from collecting. l Liquids, petroleum products, and substances listed in 40 CFR Parts 110, 117, or 302 shall be stored in approved containers and drums and shall not be overfilled. Containers and drums shall be stored in temporary secondary containment facilities. l Temporary secondary containment facilities shall provide for a spill containment volume able to contain 10% of the total enclosed container volume of all containers, or 110% of the capa- city of the largest container within its boundary, whichever is greater. l Secondary containment facilities shall be impervious to the materials stored therein for a min- imum contact time of 72 hours. l Sufficient separation should be provided between stored containers to allow for spill cleanup and emergency response access. l During the wet weather season (Oct 1 â€“ April 30), each secondary containment facility shall be covered during non-working days, prior to and during rain events. l Keep material storage areas clean, organized and equipped with an ample supply of appro- priate spill clean-up material (spill kit). l The spill kit should include, at a minimum: 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page319 o 1-Water Resistant Nylon Bag o 3-Oil Absorbent Socks 3â€x 4â€™ o 2-Oil Absorbent Socks 3â€x 10â€™ o 12-Oil Absorbent Pads 17â€x19â€ o 1-Pair Splash Resistant Goggles o 3-Pair Nitrile Gloves o 10-Disposable Bags with Ties o Instructions Maintenance Standards l Secondary containment facilities shall be maintained free of accumulated rainwater and spills. In the event of spills or leaks, accumulated rainwater and spills shall be collected and placed into drums. These liquids shall be handled as hazardous waste unless testing determines them to be non-hazardous. l Re-stock spill kit materials as needed. BMP C154: Concrete Washout Area Purpose Prevent or reduce the discharge of pollutants from concrete waste to stormwater by conducting washout off-site, or performing on-site washout in a designated area. Conditions of Use Concrete washout areas are implemented on construction projects where: l Concrete is used as a construction material l It is not possible to dispose of all concrete wastewater and washout off-site (ready mix plant, etc.). l Concrete truck drums are washed on-site. Note that auxiliary concrete truck components (e.g. chutes and hoses) and small concrete handling equipment (e.g. hand tools, screeds, shovels, rakes, floats, trowels, and wheel- barrows) may be washed into formed areas awaiting concrete pour. At no time shall concrete be washed off into the footprint of an area where an infiltration feature will be installed. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page320 Design and Installation Specifications Implementation l Perform washout of concrete truck drums at an approved off-site location or in designated con- crete washout areas only. l Do not wash out concrete onto non-formed areas, or into storm drains, open ditches, streets, or streams. l Wash equipment difficult to move, such as concrete paving machines, in areas that do not dir- ectly drain to natural or constructed stormwater conveyance or potential infiltration areas. l Do not allow excess concrete to be dumped on-site, except in designated concrete washout areas as allowed above. l Concrete washout areas may be prefabricated concrete washout containers, or self-installed structures (above-grade or below-grade). l Prefabricated containers are most resistant to damage and protect against spills and leaks. Companies may offer delivery service and provide regular maintenance and disposal of solid and liquid waste. l If self-installed concrete washout areas are used, below-grade structures are preferred over above-grade structures because they are less prone to spills and leaks. l Self-installed above-grade structures should only be used if excavation is not practical. l Concrete washout areas shall be constructed and maintained in sufficient quantity and size to contain all liquid and concrete waste generated by washout operations. Education l Discuss the concrete management techniques described in this BMP with the ready-mix con- crete supplier before any deliveries are made. l Educate employees and subcontractors on the concrete waste management techniques described in this BMP. l Arrange for the contractorâ€™s superintendent or Certified Erosion and Sediment Control Lead (CESCL) to oversee and enforce concrete waste management procedures. l A sign should be installed adjacent to each concrete washout area to inform concrete equip- ment operators to utilize the proper facilities. Contracts Incorporate requirements for concrete waste management into concrete supplier and subcontractor agreements. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page321 Location and Placement l Locate concrete washout areas at least 50 feet from sensitive areas such as storm drains, open ditches, water bodies, or wetlands. l Allow convenient access to the concrete washout area for concrete trucks, preferably near the area where the concrete is being poured. l If trucks need to leave a paved area to access the concrete washout area, prevent track-out with a pad of rock or quarry spalls (see BMP C105: Stabilized Construction Access). These areas should be far enough away from other construction traffic to reduce the likelihood of acci- dental damage and spills. l The number of concrete washout areas you install should depend on the expected demand for storage capacity. l On large sites with extensive concrete work, concrete washout areas should be placed in mul- tiple locations for ease of use by concrete truck drivers. Concrete Truck Washout Procedures l Washout of concrete truck drums shall be performed in designated concrete washout areas only. l Concrete washout from concrete pumper bins can be washed into concrete pumper trucks and discharged into designated concrete washout areas or properly disposed of off-site. Concrete Washout Area Installation l Concrete washout areas should be constructed as shown in the figures below, with a recom- mended minimum length and minimum width of 10 ft, but with sufficient quantity and volume to contain all liquid and concrete waste generated by washout operations. l Plastic lining material should be a minimum of 10 mil polyethylene sheeting and should be free of holes, tears, or other defects that compromise the impermeability of the material. l Lath and flagging should be commercial type. l Liner seams shall be installed in accordance with manufacturersâ€™ recommendations. l Soil base shall be prepared free of rocks or other debris that may cause tears or holes in the plastic lining material. Maintenance Standards Inspection and Maintenance l Inspect and verify that concrete washout areas are in place prior to the commencement of con- crete work. l Once concrete wastes are washed into the designated washout area and allowed to harden, 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page322 the concrete should be broken up, removed, and disposed of per applicable solid waste reg- ulations. Dispose of hardened concrete on a regular basis. l During periods of concrete work, inspect the concrete washout areas daily to verify continued performance. o Check overall condition and performance. o Check remaining capacity (% full). o If using self-installed concrete washout areas, verify plastic liners are intact and side- walls are not damaged. o If using prefabricated containers, check for leaks. l Maintain the concrete washout areas to provide adequate holding capacity with a minimum freeboard of 12 inches. l Concrete washout areas must be cleaned, or new concrete washout areas must be con- structed and ready for use once the concrete washout area is 75% full. l If the concrete washout area is nearing capacity, vacuum and dispose of the waste material in an approved manner. l Do not discharge liquid or slurry to waterways, storm drains or directly onto ground. l Do not discharge to the sanitary sewer without local approval. l Place a secure, non-collapsing, non-water collecting cover over the concrete washout area prior to predicted wet weather to prevent accumulation and overflow of pre- cipitation. l Remove and dispose of hardened concrete and return the structure to a functional con- dition. Concrete may be reused on-site or hauled away for disposal or recycling. l When you remove materials from a self-installed concrete washout area, build a new struc- ture; or, if the previous structure is still intact, inspect for signs of weakening or damage, and make any necessary repairs. Re-line the structure with new plastic after each cleaning. Removal of Concrete Washout Areas l When concrete washout areas are no longer required for the work, the hardened concrete, slurries and liquids shall be removed and properly disposed of. l Materials used to construct concrete washout areas shall be removed from the site of the work and disposed of or recycled. l Holes, depressions or other ground disturbance caused by the removal of the concrete washout areas shall be backfilled, repaired, and stabilized to prevent erosion. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page323 Figure II-3.7: Concrete Washout Area with Wood Planks 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page324 Figure II-3.8: Concrete Washout Area with Straw Bales 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page325 Figure II-3.9: Prefabricated Concrete Washout Container w/Ramp 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page326 BMP C160: Certified Erosion and Sediment Control Lead Purpose The project proponent designates at least one person as the responsible representative in charge of erosion and sediment control (ESC), and water quality protection. The designated person shall be responsible for ensuring compliance with all local, state, and federal erosion and sediment control and water quality requirements. Construction sites one acre or larger that discharge to waters of the State must designate a Certified Erosion and Sediment Control Lead (CESCL) as the responsible representative. Conditions of Use A CESCL shall be made available on projects one acre or larger that discharge stormwater to sur- face waters of the state. Sites less than one acre may have a person without CESCL certification conduct inspections. The CESCL shall: l Have a current certificate proving attendance in an erosion and sediment control training course that meets the minimum ESC training and certification requirements established by Ecology. Ecology has provided the minimum requirements for CESCL course training, as well as a list of ESC training and certification providers at: https://ecology.wa.gov/Regulations-Permits/Permits-certifications/Certified-erosion-sed- iment-control OR l Be a Certified Professional in Erosion and Sediment Control (CPESC). For additional inform- ation go to: http://www.envirocertintl.org/cpesc/ Specifications l CESCL certification shall remain valid for three years. l The CESCL shall have authority to act on behalf of the contractor or project proponent and shall be available, or on-call, 24 hours per day throughout the period of construction. l The Construction SWPPP shall include the name, telephone number, fax number, and address of the designated CESCL. See II-2 Construction Stormwater Pollution Prevention Plans (Construction SWPPPs). l A CESCL may provide inspection and compliance services for multiple construction projects in the same geographic region, but must be on site whenever earthwork activities are 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page327 occurring that could generate release of turbid water. l Duties and responsibilities of the CESCL shall include, but are not limited to the following: o Maintaining a permit file on site at all times which includes the Construction SWPPP and any associated permits and plans. o Directing BMP installation, inspection, maintenance, modification, and removal. o Updating all project drawings and the Construction SWPPP with changes made. o Completing any sampling requirements including reporting results using electronic Dis- charge Monitoring Reports (WebDMR). o Facilitate, participate in, and take corrective actions resulting from inspections per- formed by outside agencies or the owner. o Keeping daily logs, and inspection reports. Inspection reports should include: n Inspection date/time. n Weather information; general conditions during inspection and approximate amount of precipitation since the last inspection. n Visual monitoring results, including a description of discharged stormwater. The presence of suspended sediment, turbid water, discoloration, and oil sheen shall be noted, as applicable. n Any water quality monitoring performed during inspection. n General comments and notes, including a brief description of any BMP repairs, maintenance or installations made as a result of the inspection. n A summary or list of all BMPs implemented, including observations of all erosion/sediment control structures or practices. The following shall be noted: 1. Locations of BMPs inspected. 2. Locations of BMPs that need maintenance. 3. Locations of BMPs that failed to operate as designed or intended. 4. Locations of where additional or different BMPs are required. BMP C162: Scheduling Purpose Sequencing a construction project reduces the amount and duration of soil exposed to erosion by wind, rain, runoff, and vehicle tracking. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page328 Conditions of Use The construction sequence schedule is an orderly listing of all major land-disturbing activities together with the necessary erosion and sedimentation control measures planned for the project. This type of schedule guides the contractor on work to be done before other work is started so that serious erosion and sedimentation problems can be avoided. Following a specified work schedule that coordinates the timing of land-disturbing activities and the installation of control measures is perhaps the most cost-effective way of controlling erosion during construction. The removal of ground cover leaves a site vulnerable to erosion. Construction sequen- cing that limits land clearing, provides timely installation of erosion and sedimentation controls, and restores protective cover quickly can significantly reduce the erosion potential of a site. Design Considerations l Minimize construction during rainy periods. l Schedule projects to disturb only small portions of the site at any one time. Complete grading as soon as possible. Immediately stabilize the disturbed portion before grading the next por- tion. Practice staged seeding in order to revegetate cut and fill slopes as the work progresses. II-3.3 Construction Runoff BMPs BMP C200: Interceptor Dike and Swale Purpose Provide a dike of compacted soil or a swale at the top or base of a disturbed slope or along the peri- meter of a disturbed construction area to convey stormwater. Use the dike and/or swale to intercept the runoff from unprotected areas and direct it to areas where erosion can be controlled. This can prevent storm runoff from entering the work area or sediment-laden runoff from leaving the con- struction site. Conditions of Use Use an interceptor dike or swale where runoff from an exposed site or disturbed slope must be con- veyed to an erosion control BMP which can safely convey the stormwater. l Locate upslope of a construction site to prevent runoff from entering the disturbed area. l When placed horizontally across a disturbed slope, it reduces the amount and velocity of run- off flowing down the slope. l Locate downslope to collect runoff from a disturbed area and direct it to a sediment BMP (e.g. BMP C240: Sediment Trap or BMP C241: Sediment Pond (Temporary)). 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page329 thickness is 2 feet. o For outlets at the base of steep slope pipes (pipe slope greater than 10 percent), use an engineered energy dissipator. o Filter fabric or erosion control blankets should always be used under riprap to prevent scour and channel erosion. See BMP C122: Nets and Blankets. l Bank stabilization, bioengineering, and habitat features may be required for disturbed areas. This work may require a Hydraulic Project Approval (HPA) from the Washington State Depart- ment of Fish and Wildlife. See I-2.11 Hydraulic Project Approvals. Maintenance Standards l Inspect and repair as needed. l Add rock as needed to maintain the intended function. l Clean energy dissipator if sediment builds up. BMP C220: Inlet Protection Purpose Inlet protection prevents coarse sediment from entering drainage systems prior to permanent sta- bilization of the disturbed area. Conditions of Use Use inlet protection at inlets that are operational before permanent stabilization of the disturbed areas that contribute runoff to the inlet. Provide protection for all storm drain inlets downslope and within 500 feet of a disturbed or construction area, unless those inlets are preceded by a sediment trapping BMP. Also consider inlet protection for lawn and yard drains on new home construction. These small and numerous drains coupled with lack of gutters can add significant amounts of sediment into the roof drain system. If possible, delay installing lawn and yard drains until just before landscaping, or cap these drains to prevent sediment from entering the system until completion of landscaping. Provide 18-inches of sod around each finished lawn and yard drain. Table II-3.10: Storm Drain Inlet Protection lists several options for inlet protection. All of the methods for inlet protection tend to plug and require a high frequency of maintenance. Limit contributing drain- age areas for an individual inlet to one acre or less. If possible, provide emergency overflows with additional end-of-pipe treatment where stormwater ponding would cause a hazard. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page356 Table II-3.10: Storm Drain Inlet Protection Applicable for Type of Inlet Pro- Emergency Paved/ Earthen Sur- Conditions of Use tection Overflow faces Drop Inlet Protection Yes, temporary Applicable for heavy flows. Easy Excavated drop flooding may Earthen toÂ maintain. Large area requirement: inlet protection occur 30'x30'/acre Block and gravel Applicable for heavy concentrated flows. drop inlet pro- Yes Paved or Earthen Will not pond. tection Gravel and wire Applicable for heavy concentrated flows. drop inlet pro- No Paved or Earthen Will pond. Can withstand traffic. tection Catch basin filters Yes Paved or Earthen Frequent maintenance required. Curb Inlet Protection Curb inlet pro- Small capacity Used for sturdy, more compact install- tection with Paved overflow ation. wooden weir Block and gravel curb inlet pro- Yes Paved Sturdy, but limited filtration. tection Culvert Inlet Protection Culvert inlet sed- N/A N/A 18 month expected life. iment trap Design and Installation Specifications Excavated Drop Inlet Protection Excavated drop inlet protection consists of an excavated impoundment around the storm drain inlet. Sediment settles out of the stormwater prior to entering the storm drain. Design and installation spe- cifications for excavated drop inlet protection include: l Provide a depth of 1-2 ft as measured from the crest of the inlet structure. l Slope sides of excavation should be no steeper than 2H:1V. l Minimum volume of excavation is 35 cubic yards. l Shape the excavation to fit the site, with the longest dimension oriented toward the longest inflow area. l Install provisions for draining to prevent standing water. l Clear the area of all debris. 2019Stormwater ManagementManualfor WesternWashington VolumeII- Chapter 3- Page357 l Grade the approach to the inlet uniformly. l Drill weep holes into the side of the inlet. l Protect weep holes with screen wire and washed aggregate. l Seal weep holes when removing structure and stabilizing area. l Build a temporary dike, if necessary, to the down slope side of the structure to prevent bypass flow. Block and Gravel Filter A block and gravel filter is a barrier formed around the inlet with standard concrete blocks and gravel. See Figure II-3.17: Block and Gravel Filter. Design and installation specifications for block gravel fil- ters include: l Provide a height of 1 to 2 feet above the inlet. l Recess the first row of blocks 2-inches into the ground for stability. l Support subsequent courses by placing a pressure treated wood 2x4 through the block open- ing. l Do not use mortar. l Lay some blocks in the bottom row on their side to allow for dewatering the pool. l Place hardware cloth or comparable wire mesh with Â½-inch openings over all block openings. l Place gravel to just below the top of blocks on slopes of 2H:1V or flatter. l An alternative design is a gravel berm surrounding the inlet, as follows: o Provide a slope of 3H:1V on the upstream side of the berm. o Provide a slope of 2H:1V on the downstream side of the berm. o Provide a 1-foot wide level stone area between the gravel berm and the inlet. o Use stones 3 inches in diameter or larger on the upstream slope of the berm. o Use gravel Â½- to Â¾-inch at a minimum thickness of 1-foot on the downstream slope of the berm. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page358 Figure II-3.17: Block and Gravel Filter 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page359 Gravel and Wire Mesh Filter Gravel and wire mesh filters are gravel barriers placed over the top of the inlet. This method does not provide an overflow. Design and installation specifications for gravel and wire mesh filters include: l Use a hardware cloth or comparable wire mesh with Â½-inch openings. o Place wire mesh over the drop inlet so that the wire extends a minimum of 1-foot bey- ond each side of the inlet structure. o Overlap the strips if more than one strip of mesh is necessary. l Place coarse aggregate over the wire mesh. o Provide at least a 12-inch depth of aggregate over the entire inlet opening and extend at least 18-inches on all sides. Catch Basin Filters Catch basin filters are designed by manufacturers for construction sites. The limited sediment stor- age capacity increases the amount of inspection and maintenance required, which may be daily for heavy sediment loads. To reduce maintenance requirements, combine a catch basin filter with another type of inlet protection. This type of inlet protection provides flow bypass without overflow and therefore may be a better method for inlets located along active rights-of-way. Design and install- ation specifications for catch basin filters include: l Provides 5 cubic feet of storage. l Requires dewatering provisions. l Provides a high-flow bypass that will not clog under normal use at a construction site. l Insert the catch basin filter in the catch basin just below the grating. Curb Inlet Protection with Wooden Weir Curb inlet protection with wooden weir is an option that consists of a barrier formed around a curb inlet with a wooden frame and gravel. Design and installation specifications for curb inlet protection with wooden weirs include: l Use wire mesh with Â½-inch openings. l Use extra strength filter cloth. l Construct a frame. l Attach the wire and filter fabric to the frame. l Pile coarse washed aggregate against the wire and fabric. l Place weight on the frame anchors. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page360 Block and Gravel Curb Inlet Protection Block and gravel curb inlet protection is a barrier formed around a curb inlet with concrete blocks and gravel. See Figure II-3.18: Block and Gravel Curb Inlet Protection. Design and installation spe- cifications for block and gravel curb inlet protection include: l Use wire mesh with Â½-inch openings. l Place two concrete blocks on their sides abutting the curb at either side of the inlet opening. These are spacer blocks. l Place a 2x4 stud through the outer holes of each spacer block to align the front blocks. l Place blocks on their sides across the front of the inlet and abutting the spacer blocks. l Place wire mesh over the outside vertical face. l Pile coarse aggregate against the wire to the top of the barrier. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page361 Figure II-3.18: Block and Gravel Curb Inlet Protection 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page362 Curb and Gutter Sediment Barrier Curb and gutter sediment barrier is a sandbag or rock berm (riprap and aggregate) 3 feet high and 3 feet wide in a horseshoe shape. See Figure II-3.19: Curb and Gutter Barrier. Design and installation specifications for curb and gutter sediment barrier include: l Construct a horseshoe shaped berm, faced with coarse aggregate if using riprap, 3 feet high and 3 feet wide, at least 2 feet from the inlet. l Construct a horseshoe shaped sedimentation trap on the upstream side of the berm. Size the trap to sediment trap standards for protecting a culvert inlet. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page363 Figure II-3.19: Curb and Gutter Barrier 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page364 Maintenance Standards l Inspect all forms of inlet protection frequently, especially after storm events. Clean and replace clogged catch basin filters. For rock and gravel filters, pull away the rocks from the inlet and clean or replace. An alternative approach would be to use the clogged rock as fill and put fresh rock around the inlet. l Do not wash sediment into storm drains while cleaning. Spread all excavated material evenly over the surrounding land area or stockpile and stabilize as appropriate. Approved as Functionally Equivalent Ecology has approved products as able to meet the requirements of this BMP. The products did not pass through the Technology Assessment Protocol â€“ Ecology (TAPE) process. Local jurisdictions may choose not to accept these products, or may require additional testing prior to consideration for local use. Products that Ecology has approved as functionally equivalent are available for review on Ecologyâ€™s website at: https://ecology.wa.gov/Regulations-Permits/Guidance-technical-assistance/Stormwater-per- mittee-guidance-resources/Emerging-stormwater-treatment-technologies BMP C231: Brush Barrier Purpose The purpose of brush barriers is to reduce the transport of coarse sediment from a construction site by providing a temporary physical barrier to sediment and reducing the runoff velocities of overland flow. Conditions of Use l Brush barriers may be used downslope of disturbed areas that are less than one-quarter acre. l Brush barriers are not intended to treat concentrated flows, nor are they intended to treat sub- stantial amounts of overland flow. Any concentrated flows must be directed to a sediment trap- ping BMP. The only circumstance in which overland flow can be treated solely by a brush barrier, rather than by a sediment trapping BMP, is when the area draining to the barrier is small. l Brush barriers should only be installed on contours. Design and Installation Specifications l Height: 2 feet (minimum) to 5 feet (maximum). l Width: 5 feet at base (minimum) to 15 feet (maximum). l Filter fabric (geotextile) may be anchored over the brush berm to enhance the filtration ability of the barrier. Ten-ounce burlap is an adequate alternative to filter fabric. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page365 Design and Installation Specifications l The vegetated strip shall consist of a continuous strip of dense vegetation with topsoil for a min- imum of a 25-foot length along the flowpath. Grass-covered, landscaped areas are generally not adequate because the volume of sediment overwhelms the grass. Ideally, vegetated strips shall consist of undisturbed native growth with a well-developed soil that allows for infiltration of runoff. l The slope within the vegetated strip shall not exceed 4H:1V. l The uphill boundary of the vegetated strip shall be delineated with clearing limits. Maintenance Standards l Any areas damaged by erosion or construction activity shall be seeded immediately and pro- tected by mulch. l If more than 5 feet of the original vegetated strip width has had vegetation removed or is being eroded, sod must be installed. l If there are indications that concentrated flows are traveling across the vegetated strip, storm- water runoff controls must be installed to reduce the flows entering the vegetated strip, or addi- tional perimeter protection must be installed. BMP C235: Wattles Purpose Wattles are temporary erosion and sediment control barriers consisting of straw, compost, or other material that is wrapped in netting made of natural plant fiber or similar encasing material. They reduce the velocity and can spread the flow of rill and sheet runoff, and can capture and retain sed- iment. Conditions of Use l Wattles shall consist of cylinders of plant material such as weed-free straw, coir, wood chips, excelsior, or wood fiber or shavings encased within netting made of natural plant fibers unaltered by synthetic materials. l Use wattles: o In disturbed areas that require immediate erosion protection. o On exposed soils during the period of short construction delays, or over winter months. o On slopes requiring stabilization until permanent vegetation can be established. l The material used dictates the effectiveness period of the wattle. Generally, wattles are effect- ive for one to two seasons. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page377 l Prevent rilling beneath wattles by entrenching and overlapping wattles to prevent water from passing between them. Design Criteria l See Figure II-3.24: Wattles for typical construction details. l Wattles are typically 8 to 10 inches in diameter and 25 to 30 feet in length. l Install wattles perpendicular to the flow direction and parallel to the slope contour. l Place wattles in shallow trenches, staked along the contour of disturbed or newly constructed slopes. Dig narrow trenches across the slope (on contour) to a depth of 3- to 5-inches on clay soils and soils with gradual slopes. On loose soils, steep slopes, and areas with high rainfall, the trenches should be dug to a depth of 5- to 7- inches, or 1/2 to 2/3 of the thickness of the wattle. l Start building trenches and installing wattles from the base of the slope and work up. Spread excavated material evenly along the uphill slope and compact it using hand tamping or other methods. l Construct trenches at intervals of 10- to 25-feet depending on the steepness of the slope, soil type, and rainfall. The steeper the slope the closer together the trenches. l Install the wattles snugly into the trenches and overlap the ends of adjacent wattles 12 inches behind one another. l Install stakes at each end of the wattle, and at 4-foot centers along entire length of wattle. l If required, install pilot holes for the stakes using a straight bar to drive holes through the wattle and into the soil. l Wooden stakes should be approximately 0.75 x 0.75 x 24 inches min. Willow cuttings or 3/8- inch rebar can also be used for stakes. l Stakes should be driven through the middle of the wattle, leaving 2 to 3 inches of the stake pro- truding above the wattle. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page378 Figure II-3.24: Wattles 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page379 Maintenance Standards l Wattles may require maintenance to ensure they are in contact with soil and thoroughly entrenched, especially after significant rainfall on steep sandy soils. l Inspect the slope after significant storms and repair any areas where wattles are not tightly abutted or water has scoured beneath the wattles. Approved as Functionally Equivalent Ecology has approved products as able to meet the requirements of this BMP. The products did not pass through the Technology Assessment Protocol â€“ Ecology (TAPE) process. Local jurisdictions may choose not to accept these products, or may require additional testing prior to consideration for local use. Products that Ecology has approved as functionally equivalent are available for review on Ecologyâ€™s website at: https://ecology.wa.gov/Regulations-Permits/Guidance-technical-assistance/Stormwater-per- mittee-guidance-resources/Emerging-stormwater-treatment-technologies BMP C236: Vegetative Filtration Purpose Vegetative filtration as a BMP is used in conjunction with detention storage in the form of portable tanks or BMP C241: Sediment Pond (Temporary), BMP C206: Level Spreader, and a pumping sys- tem with surface intake. Vegetative filtration improves turbidity levels of stormwater discharges by fil- tering runoff through existing vegetation where undisturbed forest floor duff layer or established lawn with thatch layer are present. Vegetative filtration can also be used to infiltrate dewatering waste from foundations, vaults, and trenches as long as runoff does not occur. Conditions of Use l For every five acres of disturbed soil use one acre of grass field, farm pasture, or wooded area. Reduce or increase this area depending on project size, ground water table height, and other site conditions. l Wetlands shall not be used for vegetative filtration. l Do not use this BMP in areas with a high ground water table, or in areas that will have a high seasonal ground water table during the use of this BMP. l This BMP may be less effective on soils that prevent the infiltration of the water, such as hard till. l Using other effective source control measures throughout a construction site will prevent the generation of additional highly turbid water and may reduce the time period or area need for this BMP. l Stop distributing water into the vegetated filtration area if standing water or erosion results. 2019StormwaterManagementManualforWesternWashington VolumeII-Chapter3-Page380 B. Correspondence City of Arlington 238 North Olympic Avenue Arlington, WA 98233 Phone: (360) 403-3551 C. Site Inspection Form Construction Stormwater Site Inspection Form Project Name Permit # Inspection Date Time Name of Certified Erosion Sediment Control Lead (CESCL) or qualified inspector if less than one acre Print Name: Approximate rainfall amount since the last inspection (in inches): Approximate rainfall amount in the last 24 hours (in inches): Current Weather Clear Cloudy Mist Rain Wind Fog A. Type of inspection: Weekly Post Storm Event Other B. Phase of Active Construction (check all that apply): Pre Construction/installation of erosion/sediment Clearing/Demo/Grading Infrastructure/storm/roads controls Concrete pours Vertical Utilities Construction/buildings Offsite improvements Site temporary stabilized Final stabilization C. Questions: 1. Were all areas of construction and discharge points inspected? Yes No 2. Did you observe the presence of suspended sediment, turbidity, discoloration, or oil sheen Yes No 3. Was a water quality sample taken during inspection? (refer to permit conditions S4 & S5) Yes No 4. Was there a turbid discharge 250 NTU or greater, or Transparency 6 cm or less?* Yes No 5. If yes to #4 was it reported to Ecology? Yes No 6. Is pH sampling required? pH range required is 6.5 to 8.5. Yes No If answering yes to a discharge, describe the event. Include when, where, and why it happened; what action was taken, and when. *If answering yes to # 4 record NTU/Transparency with continual sampling daily until turbidity is 25 NTU or less/ transparency is 33 cm or greater. Sampling Results: Date: Parameter Method (circle one) Result Other/Note NTU cm pH Turbidity tube, meter, laboratory pH Paper, kit, meter Page 1 Construction Stormwater Site Inspection Form D. Check the observed status of all items. Provide â€œAction Required â€œdetails and dates. Element # Inspection BMPs BMP needs BMP Action Inspected maintenance failed required yes no n/a (describe in section F) 1 Before beginning land disturbing Clearing activities are all clearing limits, Limits natural resource areas (streams, wetlands, buffers, trees) protected with barriers or similar BMPs? (high visibility recommended) 2 Construction access is stabilized Construction with quarry spalls or equivalent Access BMP to prevent sediment from being tracked onto roads? Sediment tracked onto the road way was cleaned thoroughly at the end of the day or more frequent as necessary. 3 Are flow control measures installed Control Flow to control stormwater volumes and Rates velocity during construction and do they protect downstream properties and waterways from erosion? If permanent infiltration ponds are used for flow control during construction, are they protected from siltation? 4 All perimeter sediment controls Sediment (e.g. silt fence, wattles, compost Controls socks, berms, etc.) installed, and maintained in accordance with the Stormwater Pollution Prevention Plan (SWPPP). Sediment control BMPs (sediment ponds, traps, filters etc.) have been constructed and functional as the first step of grading. Stormwater runoff from disturbed areas is directed to sediment removal BMP. 5 Have exposed un-worked soils Stabilize been stabilized with effective BMP Soils to prevent erosion and sediment deposition? Page 2 Construction Stormwater Site Inspection Form Element # Inspection BMPs BMP needs BMP Action Inspected maintenance failed required yes no n/a (describe in section F) 5 Are stockpiles stabilized from erosion, Stabilize Soils protected with sediment trapping Cont. measures and located away from drain inlet, waterways, and drainage channels? Have soils been stabilized at the end of the shift, before a holiday or weekend if needed based on the weather forecast? Has stormwater and ground water 6 been diverted away from slopes and Protect disturbed areas with interceptor dikes, Slopes pipes and or swales? Is off-site storm water managed separately from stormwater generated on the site? Is excavated material placed on uphill side of trenches consistent with safety and space considerations? Have check dams been placed at regular intervals within constructed channels that are cut down a slope? 7 Storm drain inlets made operable Drain Inlets during construction are protected. Are existing storm drains within the influence of the project protected? 8 Have all on-site conveyance channels Stabilize been designed, constructed and Channel and stabilized to prevent erosion from Outlets expected peak flows? Is stabilization, including armoring material, adequate to prevent erosion of outlets, adjacent stream banks, slopes and downstream conveyance systems? 9 Are waste materials and demolition Control debris handled and disposed of to Pollutants prevent contamination of stormwater? Has cover been provided for all chemicals, liquid products, petroleum products, and other material? Has secondary containment been provided capable of containing 110% of the volume? Were contaminated surfaces cleaned immediately after a spill incident? Were BMPs used to prevent contamination of stormwater by a pH modifying sources? Page 3 Construction Stormwater Site Inspection Form Element # Inspection BMPs BMP needs BMP Action Inspected maintenance failed required yes no n/a (describe in section F) 9 Wheel wash wastewater is handled Cont. and disposed of properly. 10 Concrete washout in designated areas. Control No washout or excess concrete on the Dewatering ground. Dewatering has been done to an approved source and in compliance with the SWPPP. Were there any clean non turbid dewatering discharges? 11 Are all temporary and permanent Maintain erosion and sediment control BMPs BMP maintained to perform as intended? 12 Has the project been phased to the Manage the maximum degree practicable? Project Has regular inspection, monitoring and maintenance been performed as required by the permit? Has the SWPPP been updated, implemented and records maintained? 13 Is all Bioretention and Rain Garden Protect LID Facilities protected from sedimentation with appropriate BMPs? Is the Bioretention and Rain Garden protected against over compaction of construction equipment and foot traffic to retain its infiltration capabilities? Permeable pavements are clean and free of sediment and sediment laden- water runoff. Muddy construction equipment has not been on the base material or pavement. Have soiled permeable pavements been cleaned of sediments and pass infiltration test as required by stormwater manual methodology? Heavy equipment has been kept off existing soils under LID facilities to retain infiltration rate. E. Check all areas that have been inspected. All in place BMPs All disturbed soils All concrete wash out area All material storage areas All discharge locations All equipment storage areas All construction entrances/exits Page 4 Construction Stormwater Site Inspection Form F. Elements checked â€œAction Requiredâ€ (section D) describe corrective action to be taken. List the element number; be specific on location and work needed. Document, initial, and date when the corrective action has been completed and inspected. Element Description and Location Action Required Completion Initials # Date Attach additional page if needed Sign the following certification: â€œI certify that this report is true, accurate, and complete, to the best of my knowledge and beliefâ€ Inspected by: (print) (Signature) Date: Title/Qualification of Inspector: Page 5 D. Construction Stormwater General Permit (CSWGP) Not required since we do not exceed 1 acre of site disturbance. E. 303(d) List Waterbodies / TMDL Waterbodies Information Not Applicable; No Known downstream listed waterbody F. Contaminated Site Information Not applicable; no known onsite contamination. G. Engineering Calculations NOT APPLICABLE. 18204 59th Avenue NE REVIEW COMMENT FORM Arlington, WA 98223 360-403-3551 Project Name: Stillaguamish Square - Parking Expansion Permit No.: PWD#3456 Review Date: 6/12/2023 Contact: Steve Barnes Phone No.: 206-550-9296 Review Phase: 1 Report Date: Reviewing Dept.: CED Applicant: Cornerstone DWG Issue Date: Architectural Group # Rev. Dwg. or Addâ€™l Ref. City Comment Response/Resolution Spec. Ref. Approved 1. MH General Provide Dumpster Detail 2. MH Landscape Provide Landscape Plan with 20% parking lot shading 3. BG SWPPP Element #2 says that there will be no BMPs used for a construction entrance. Even if there is no construction entrance, any trackout onto West Ave or 5th St will need to be cleaned up daily. 4. BG General The ADA stalls for the south businesses are removed in the center part of the parking area that is being expanded. Where are those ADA stalls being moved to? 5. BG General Where the existing ADA stalls were removed, the existing crosswalk is still shown. The existing ADA crosswalk should be removed if there are no longer ADA stalls in that portion of the parking lot. 6. BG General No detail is provided for the dumpster enclosure. The dumpster enclosure needs to meet current requirements for materials. Confirm with planning that the current materials are acceptable. 7. RM C1.3 Hydrant shall be protected by bollards on NE and NW corners. Back of hydrant shall have a minimum of 24" of radial clearance from trash enclosure wall. 8. AR Landscape Plan - Including 20% shading throughout the entire south lot. 9. AR Dumpster Enclosure shall meet the requirements of the Design Standards. 10. AR Civil Plans state "New Trash Enclosure", "New Parking Lights", "New Extruded Curb", and "New Striping & Page 1 of 2 18204 59th Avenue NE REVIEW COMMENT FORM Arlington, WA 98223 360-403-3551 Project Name: Stillaguamish Square - Parking Expansion Permit No.: PWD#3456 Review Date: 6/12/2023 Contact: Steve Barnes Phone No.: 206-550-9296 Review Phase: 1 Report Date: Reviewing Dept.: CED Applicant: Cornerstone DWG Issue Date: Architectural Group # Rev. Dwg. or Addâ€™l Ref. City Comment Response/Resolution Spec. Ref. Approved Arrows" per Arch Plan, however no Arch Plan was provided. Please provide. Page 2 of 2 CITY OFARLINGTON 18204 59th Avenue NE, Arlington, WA,98223 INSPECTIONS: 360-403-3417 - Permit Centcr: 360-403-3551 CIVILPERMIT 540 N WEST AVE Permit #: 3456 Project Name: Stillaguamish Square - Parking Expansion Parcel #: 0061 8100200300 Project #: Expires:1 1/06/2025 OWNER APPI,ICANT CONTRACTOR STILLAGUAMISH SQUARE LLP Comerstone Architectural Group Ismael's Construction I -l,C 540 N WEST AVE 6161NE l75th St- Ste 101 12419 Beverly Park Rd ARLINGTON, WA 98223 Kenmore, WA 98028 L)'nnwood , wA 98087 2065s09296 3602433 t4'/ LIC#:602991611 EXP:0413012025 LIC#; ISMAECL90ICQ EXP 02118/2026 JOB DESCRIPTION Reconfigure Parking Lot CONDITIONS It is the responsibility ofthe Owner, Developer, and Contactor to adhere to the approved plans, verifl' compliance with the City of Arlington Municipal Code, Public Works Design and Construction Standards, Intemal Code Council (ICC), applicable local, state, and federal requirements or any order, proclamation, guidance or decision ofthe Govemor. INSPECTIONS INSPECTIONS {360-403-3417) MUST BE CALLED IN BEFORE 3:30PM TO BE ON THE NEXT BUSINESS DAY INSPECTION SCHEDULE. Inspections are Monday- Friday with the exception of local, state or federal holidays. Building, Storm and civil inspections - 8am-4:30pm; Water or Sewer inspection - 8am-3:30pm. To cancel or modi8/ an inspection - Building, storm or civil call 360-403-3433; Water or Sewer c^Il360-403-3526. It is the responsibility of the Owner, Developer and Conhactor to call and arrange for appropdate inspections. Onsite tailgate meetings are advised with each individual inspector prior to installation oftheir related facilities with those who are performing the work. Failure to call for inspection may result in work being left exposed and/or removed and reconstructed. Reinspection may be charged at $127.00 per hour, 1/2 hour minimum for failure to call inspection. PERMIT APPROVAL Work to be performed as described and/or shown in the approved plans and-/or application for the above named project is approved lor construction by the City ofAriington Public Works Department. All work is subject to field inspection. 05/0312024 Development Manager or Designee Date oflssuance The issuance or granting ofthis permil shall not be construed to be a permit foq or approval of, any violation olthis Code or any other ordinance or order ofthe City, ofany state or federal law, or ofany ordel proclamation, guidance advice or decision ofthe Govemor ofthis State. To the extent the issuance or granting ofthis permit is interpreted to allow construction activity during any period of time when such construction is prohibited or restricted by any state or faderal law, or order, proclamation, guidance advice or decision ofthe Govemor ofthis State, this permit shall not authorize such work and shali not be valid. The building official is authorized to prevent occupancy or usâ‚¬ ofa structure where in violation ofthis Code, any other City ordinances ofthis jurisdiction or any other ordinance or executive order ofthe City, or ofany state or federal law, or ofany order, proclamation, guidance advice or decision ofthe Govemor. The building official is authorized to suspend or revoke this pcrmit ifit is determined to be issued in error or on the basis ofincorrect, inaccurate or incomplete information, or in violation ofany City ordinance, regulation or order, state or lederal law, or any order, proclamation, guidance or decision ofthe Govemor. I hereby certifu that I have read and examined this permit, the City ofAriington Land Use Code, the most curent edition ofthe City ofArlington Standards and Specifications know the same to be true and correct all provision or laws and ordinances goveming this type of work will be compiled with, which may include but are not limited to: Other City ofArlington dâ‚¬velopment permits, WSDW Hydraulic Project Approval (HPA), WSDOE Notice of Intent (NOI), National Pollution Discharge Elimination Systerns (fIPDES), and Corp ofForest Practices Application (FPA). I also undcrstande that all insurance, approved submittals for a1l materials and contructor's license. The contractor shall hold the City ofArlington harmless from any loss or damage to any person or property in the performalce of said work. SALES TAX n'OTfCE: Sales tax relating to consh'uction and construction matsrials in the City ofArlington must be reported on your sales tax rshrm form and coded Cily ofArlington #3101. &*- A""A"* Orira O?g<tN s f6 f 2,,1 Applicant Signature Print Name PERMIT FEES Date Name Description Fee Amount 05 I 03 12024 Processing/Techrology $25.00 0510312024 Civil Pemit $2,107.73 05 /03 12024 Civil Permit $645.00 Total Due: $2,717.73 Totat Payment: s2,777.73 Balance Due: $0.00 CALL FOR INSPECTIONS Call by 3:30 pm for nâ‚¬xt day inspection' allow 48 hours for Fire Inspections When talling for an inspection please leave the following information: Pâ‚¬rmit Number, Type oflnspection bâ‚¬ing requested' and whether you prefer morning or afternoon City of Arlington Community & Economic Development January 29, 2024 Stillaguamish Square LLP 540 N West Ave Arlington, WA 98223 RE: Pre-Construction Requirements Project Name: Stillaguamish Square Parking Expansion Project Address: 540 N West Ave, Arlington, WA 98223 Project No.: PWD-3456 Dear Mr. Barnes, In order for work to commence at the Stillaguamish Square Parking Expansion project site, the following items need to be submitted to the City of Arlington. 1. A performance bond will need to be on file with the City of Arlington. The City of Arlington Performance Bond form is included. We will require submittal of the original document. This bond is to insure completion of the following and shall be indicated on the security: All included infrastructure relating to temporary erosion and sediment control along with any private and public landscaping. Performance Bond Estimated Cost of Construction is $11,611.88 x 150% = $17,417.81 2. Contractor Information: a. License No. and 24 hour emergency contact information b. Contractor must obtain a City of Arlington Business License c. Contractor Proof of Insurance with the City of Arlington named as Additional Insured 3. Project CESCL with current certificate (1 acre or more) 4. Project Testing Company with contact information Once the items above have been received and approved, a pre-construction meeting will be scheduled. 18204 59th Avenue NE, #B - Arlington, WA, 98223 - 360-403-3551 â€“ www.arlingtonwa.gov Project closeout information The performance bond shall be released when inspection and approval of all work has been completed, as-built plans, easements, dedications, and bills of sale have been approved and a two- year, 20% maintenance bond is on file with the City of Arlington. The City does not have a template for the maintenance bond, however Suretyâ€™s standard form is acceptable and shall consist of following of which shall be indicated on the security. â€œAll included infrastructure relating any private and public landscaping.â€ â€œThe bond shall not be released without written discharge from the City of Arlingtonâ€ Maintenance Bond Estimated Cost of Construction $10,750.00 x 20% = $2,150.00 Should you have any questions or require additional information, please contact me at 360.403.3551 or kfoster@arlingtonwa.gov. Sincerely, Kristin Foster Permit Technician II Community & Economic Development CONTRUCTION PLAN REVIEW & INSPECTION FEE WORKSHEET Community & Economic Development Department City of Arlington ï¬ 18204 59th Avenue NE ï¬ Arlington WA 98223 ï¬ (360) 403-3551 This form is to be completed and submitted with Type I , Type II Type III Construction Permit Application. 1) Based on permit type requested (Type I, Type II or Type III), complete the form as follows: ï¬ Type I permits complete all sections. STILLAGUAMISH RETAIL ï¬ Type II permits complete as follows: - Grading Only - Complete Temporary Erosion and Sediment Control (TESC). - Stormwater Drainage Only - Complete the Temporary Erosion and Sediment Control and Stormwater Drainage Section for Public or Private ï¬ Type III permits complete the Temporary Erosion and Sediment Control (TESC). 2) The developer shall enter the quantities shown on the construction drawings into the Construction Calculation Worksheet. This document is used to determine the amount of plan reivew and inspection fees due to the city. 3) Excel will auto-calculate the relevant fields and subtotals throughout the document. Only the 'Quantity' columns should be completed. 4) The summary page calculates the fees due at intake for Civil and Stormwater Drainage construction permits only. This does not include fees for Grading or those required by other departments or agencies. Grading fees are based on Cubic Yard Quantity and shall be calculated at time of permit submittal. Grading fees shall be paid at permit submittal. 5) If an item that is part of your project does not exist in the spreadsheet complete the Write-In-Items section with the item, quantity and associated unit cost. There are a few unit prices that are blank, please complete them accordingly. 6) Inspection fees shall be calculated for Private Development during the review process and shall be paid upon permit issuance. PROJECT COSTS PUBLIC TOTAL PRIVATE TOTAL TOTAL PROJECT COST $ 10,750.00 $ 35,128.75 $ 45,878.75 OK PLAN REVIEW & INSPECTION FEES PLAN REVIEW & INSPECTION FEE (6% of Project Value) $ 645.00 GRADING FEE (4) (Cubic Yard ) $ - Review fees due at time of submittal Total Review Fees Due $ 645.00 An Assurance Device such as a Performance Bond or Assignment of Funds needs to be on file with the City of Arlington prior to permit issuance. The Assurance Device shall be 150% of the Construction Calculation Worksheet which are as follows: ï¬ Road and Alley (Public) ï¬ Stormwater Drainage and Grading (Public) ï¬ Utilities (Public) ï¬ Temporary Erosion and Sediment Control (Public and Private) ASSURANCE DEVICE Base Calculation of Performance Device $ 11,611.88 PERFORMANCE DEVICE 150% Amount Due $ 17,417.81 Base Calculation of Maintenance Device $ 10,750.00 MAINTENANCE DEVICE 20% Amount Due $ 2,150.00 1 Rev 7/2017 CONSTRUCTION CALCULATION WORKSHEET TEMPORARY EROSION & SEDIMENT CONTROL Include Public Improvements & Private Development Description Unit Price Unit Quantity Cost Reference # Backfill & compaction-embankment $ 6.50 CY $ - Check dams $ 78.00 EACH $ - BMP C207 Catch Basin Protection $ 35.50 EACH 1 $ 35.50 Crushed surfacing 1 1/4" minus $ 18.00 TON $ - WSDOT 9-03.9(3) Ditching $ 8.00 CY $ - Excavation-bulk $ 3.00 CY $ - Fence, silt $ 2.00 LF $ - BMP C233 Fence, Temporary (NGPA) $ 2.00 LF $ - Geotextile Fabric $ 2.50 SY $ - Hay Bale Silt Trap $ 0.50 EACH $ - Hydroseeding $ 4,200.00 ACRE $ - BMP C120 Interceptor Swale / Dike $ 1.00 LF $ - Jute Mesh $ 2.00 SY $ - BMP C122 Level Spreader $ 1.75 LF $ - Mulch, by hand, straw, 3" deep $ 3.00 SY $ - BMP C121 Mulch, by machine, straw, 2" deep $ 1.00 SY $ - BMP C121 Piping, temporary, CPP, 6" $ 12.50 LF $ - Piping, temporary, CPP, 8" $ 19.00 LF $ - Piping, temporary, CPP, 12" $ 24.00 LF $ - Plastic covering, 6mm thick, sandbagged $ 3.00 SY $ - BMP C123 Rip Rap, machine placed; slopes $ 50.00 CY $ - WSDOT 9-13.1(2) Rock Construction Entrance, 50'x15'x1' $ 1,800.00 EACH $ - BMP C105 Rock Construction Entrance, 100'x15'x1' $ 3,600.00 EACH $ - BMP C105 Sediment pond riser assembly $ 3,050.00 EACH $ - BMP C241 Sediment trap, 5' high berm $ 21.00 LF $ - BMP C240 Sed. trap, 5' high, riprapped spillway berm section $ 79.00 LF $ - BMP C240 Seeding, by hand $ 1.00 SY $ - BMP C120 Sodding, 1" deep, level ground $ 8.00 SY $ - BMP C120 Sodding, 1" deep, sloped ground $ 9.50 SY $ - BMP C120 TESC Supervisor $ 84.00 HR 2 $ 168.00 Water truck, dust control $ 130.00 HR $ - BMP C140 WRITE-IN-ITEMS Straw Wattle $ 3.00 lf 162 $ 486.00 $ - $ - $ - $ - SUBTOTAL (TESC Only): $ 689.50 MOBILIZATION 10%: $ 68.95 CONTINGENCY 15%: $ 103.43 TOTAL: $ 861.88 Rev 7/2017 CONSTRUCTION CALCULATION WORKSHEET STORMWATER DRAINAGE Public Private Public Improvements Private Development Description Unit Price Unit Quantity Cost Quantity Cost Access Road, Retention / Detention $ 26.00 SY $ - $ - * (CBs include frame and lid) Beehive $ 90.00 EACH $ - $ - CB Type I $ 1,650.00 EACH $ - $ - CB Type IL $ 1,850.00 EACH $ - $ - CB Type II, 48" Dia $ 2,550.00 EACH $ - $ - for additional depth over 4' $ 650.00 FT $ - $ - CB Type II, 54" Dia $ 2,700.00 EACH $ - $ - for additional depth over 4' $ 600.00 FT $ - $ - CB Type II, 60" Dia $ 2,900.00 EACH $ - $ - for additional depth over 4' $ 750.00 FT $ - $ - CB Type II, 72" Dia $ 4,000.00 EACH $ - $ - for additional depth over 4' $ 900.00 FT $ - $ - Through-curb Inlet Framework (Add) $ 550.00 EACH $ - $ - Cleanout, PVC, 4" $ 200.00 EACH $ - $ - Cleanout, PVC, 6" $ 250.00 EACH $ - $ - Cleanout, PVC, 8" $ 300.00 EACH $ - $ - Culvert, Box __ ft x __ ft $ - LS $ - $ - Culvert, PVC, 4" $ 12.00 LF $ - $ - Culvert, PVC, 6" $ 17.00 LF $ - $ - Culvert, PVC, 8" $ 19.00 LF $ - $ - Culvert, PVC, 12" $ 30.00 LF $ - $ - Culvert, CMP, 8" $ 23.00 LF $ - $ - Culvert, CMP, 12" $ 35.00 LF $ - $ - Culvert, CMP, 15" $ 42.00 LF $ - $ - Culvert, CMP, 18" $ 47.00 LF $ - $ - Culvert, CMP, 24" $ 69.00 LF $ - $ - Culvert, CMP, 30" $ 100.00 LF $ - $ - Culvert, CMP, 36" $ 150.00 LF $ - $ - Culvert, CMP, 48" $ 194.00 LF $ - $ - Culvert, CMP, 60" $ 310.00 LF $ - $ - Culvert, CMP, 72" $ 400.00 LF $ - $ - Culvert, Concrete, 8" $ 36.00 LF $ - $ - Culvert, Concrete, 12" $ 43.00 LF $ - $ - Culvert, Concrete, 15" $ 52.00 LF $ - $ - Culvert, Concrete, 18" $ 55.00 LF $ - $ - Culvert, Concrete, 24" $ 85.00 LF $ - $ - Culvert, Concrete, 30" $ 136.00 LF $ - $ - Culvert, Concrete, 36" $ 165.00 LF $ - $ - Culvert, Concrete, 42" $ 196.00 LF $ - $ - Culvert, Concrete, 48" $ 210.00 LF $ - $ - Culvert, CPP, 6" $ 16.00 LF $ - $ - Culvert, CPP, 8" $ 22.00 LF $ - $ - Culvert, CPP, 12" $ 28.00 LF $ - $ - Culvert, CPP, 15" $ 34.00 LF $ - $ - Culvert, CPP, 18" $ 39.00 LF $ - $ - Rev 7/2017 CONSTRUCTION CALCULATION WORKSHEET Culvert, CPP, 24" $ 49.00 LF $ - $ - Culvert, CPP, 30" $ 62.00 LF $ - $ - Culvert, CPP, 36" $ 69.00 LF $ - $ - Ditching $ 12.00 CY $ - $ - Flow Dispersal Trench (1,436 base+) $ 40.00 LF $ - $ - French Drain (3' depth) $ 39.00 LF $ - $ - Geotextile, laid in trench, polypropylene $ 5.00 SY $ - $ - Infiltration pond testing $ 125.00 HR $ - $ - Mid-tank Access Riser, 48" dia, 6' deep $ 2,025.00 EACH $ - $ - Pipe, High Density Water Pipe (HDWP) $ 160.00 LF $ - $ - Pipe, C900 $ 90.00 LF $ - $ - Pond Overflow Spillway $ 18.00 SY $ - $ - Restrictor/Oil Separator, 12" $ 1,500.00 EACH $ - $ - Restrictor/Oil Separator, 15" $ 1,550.00 EACH $ - $ - Restrictor/Oil Separator, 18" $ 1,680.00 EACH $ - $ - Riprap, placed $ 52.00 CY $ - $ - Tank End Reducer (36" Dia) $ 1,280.00 EACH $ - $ - Thru-Inlet at CB $ 150.00 EACH $ - $ - Trash Rack, 12" $ 320.00 EACH $ - $ - Trash Rack, 15" $ 325.00 EACH $ - $ - Trash Rack, 18" $ 350.00 EACH $ - $ - Trash Rack, 21" $ 375.00 EACH $ - $ - WRITE-IN-ITEMS EACH $ - $ - $ - $ - $ - $ - $ - $ - SUBTOTAL: $ - $ - MOBILIZATION 10%: $ - CONTINGENCY 15%: $ - TOTAL: $ - $ - Rev 7/2017 CONSTRUCTION CALCULATION WORKSHEET GENERAL ITEMS Public Improvements Private Development Description Unit Price Unit Quantity Cost Quantity Cost Backfill & Compaction- embankment $ 8.00 CY $ - $ - Backfill & Compaction- trench $ 11.00 CY $ - $ - Clear/Remove Brush, by hand (acre) $ 2,363.00 ACRE $ - $ - Bollards - fixed $ 325.00 EACH $ - 2 $ 650.00 Bollards - removable $ 600.00 EACH $ - $ - Clearing/Grubbing/Tree Removal $ 6,000.00 ACRE $ - $ - Excavation - bulk $ 2.50 CY $ - $ - Excavation - Trench $ 5.00 CY $ - $ - Fencing, cedar, 6' high $ 25.00 LF $ - $ - Fencing, chain link, 4' $ 19.50 LF $ - $ - Fencing, chain link, vinyl coated, 6' high $ 18.00 LF $ - $ - Fencing, chain link, gate, vinyl coated, 2 $ 1,563.00 EACH $ - $ - Fencing, split rail, 3' high $ 14.00 LF $ - $ - Fill & compact - common barrow $ 27.00 CY $ - $ - Fill & compact - gravel base $ 30.00 CY $ - $ - Fill & compact - screened topsoil $ 45.00 CY $ - $ - Gabion, 12" deep, stone filled mesh $ 62.00 SY $ - $ - Gabion, 18" deep, stone filled mesh $ 86.00 SY $ - $ - Gabion, 36" deep, stone filled mesh $ 152.00 SY $ - $ - Grading, fine, by hand $ 2.00 SY $ - $ - Grading, fine, with grader $ 1.25 SY $ - 466 $ 582.50 Guard Post $ 90.00 EACH $ - $ - Monuments $ 104.00 EACH $ - $ - Sensitive Areas Sign $ 20.00 EACH $ - $ - Sodding, 1" deep, sloped ground $ 10.00 SY $ - $ - Topsoil Type A (imported) $ 30.00 CY $ - 60 $ 1,800.00 Traffic control crew ( 2 flaggers ) $ 98.00 HR $ - $ - Trail, 4" chipped wood $ 9.00 SY $ - $ - Trail, 4" crushed cinder $ 10.00 SY $ - $ - Trail, 4" top course $ 9.50 SY $ - $ - Wall, retaining, concrete $ 66.00 SF $ - $ - Wall, rockery $ 13.00 SF $ - $ - WRITE-IN-ITEMS $ - $ - $ - $ - $ - $ - $ - $ - $ - Subtotal $ - Subtotal $ 3,032.50 Rev 7/2017 CONSTRUCTION CALCULATION WORKSHEET STREET IMPROVEMENT Public Improvements Private Development Description Unit Price Unit Quantity Cost Quantity Cost AC Grinding, 4' wide machine < 1000sy $ 35.00 SY $ - $ - AC Grinding, 4' wide machine 1000-2000$ 8.50 SY $ - $ - AC Grinding, 4' wide machine > 2000sy $ 2.50 SY $ - $ - AC Removal/Disposal/Repair $ 60.00 SY $ - $ - Barricade, Type I $ 36.00 LF $ - $ - Barricade Type II $ 25.00 LF $ - $ - Barricade, Type III ( Permanent ) $ 55.00 LF $ - $ - Conduit, 2" $ 5.00 LF $ - $ - Curb & Gutter, rolled $ 20.00 LF $ - $ - Curb & Gutter, vertical $ 15.00 LF $ - $ - Curb and Gutter, demolition and disposa $ 20.00 LF $ - $ - Curb, extruded asphalt $ 5.00 LF $ - $ - Curb, extruded concrete $ 4.50 LF $ - 503 $ 2,263.50 Guard Rail $ 30.00 LF $ - $ - Sawcut, asphalt, 3" depth $ 3.50 LF $ - 270 $ 945.00 Sawcut, concrete, per 1" depth $ 3.00 LF $ - $ - Sealant, asphalt $ 2.00 LF $ - $ - Shoulder, gravel, 4" thick $ 11.00 SY $ - $ - Sidewalk, 4" thick $ 40.00 SY $ - $ - Sidewalk, 4" thick, demolition and dispos $ 36.00 SY $ - $ - Sidewalk, 6" thick $ 45.00 SY $ - 75 $ 3,375.00 Sidewalk, 6" thick, demolition and dispos $ 45.00 SY $ - $ - Signs $ - LS $ - $ - Sign, Handicap $ 100.00 EACH $ - $ - Striping, per stall $ 7.50 EACH $ - 43 $ 322.50 Street Light System $ - LS $ - $ - Traffic Signal $ 1.00 LS $ - $ - Traffic Signal Modification $ - LS $ - $ - Striping, thermoplastic, ( for crosswalk ) $ 3.50 SF $ - $ - Striping, 4" reflectorized line $ 0.40 LF $ - $ - AC Patching/Trenching Restoration $ 100.00 TON $ - $ - Controlled Density Fill (CDF) $ 90.00 CY $ - $ - WRITE-IN-ITEMS $ - $ - $ - $ - $ - $ - $ - $ - $ - Subtotal $ - Subtotal $ 6,906.00 Rev 7/2017 CONSTRUCTION CALCULATION WORKSHEET STREET SURFACING/PAVEMENT Public Improvements Private Development Description Unit Price Unit Quantity Cost Quantity Cost Asphalt Overlay, 1.5" AC $ 12.00 SY $ - $ - Asphalt Overlay, 2" AC $ 15.00 SY $ - 466 $ 6,990.00 Asphalt Road 2", First 2500 SY $ 10.00 SY $ - $ - Asphalt Road 2", Qty. over 2500SY $ 9.00 SY $ - $ - Asphalt Road 3", First 2500 SY $ 15.00 SY $ - $ - Asphalt Road 3", Qty. over 2500 SY $ 13.00 SY $ - $ - Asphalt Road 5", First 2500 SY $ 22.00 SY $ - $ - Asphalt Road 5", Qty. Over 2500 SY $ 22.00 SY $ - $ - Asphalt Road 6", First 2500 SY $ 25.00 SY $ - $ - Asphalt Road 6", Qty. Over 2500 SY $ 24.00 SY $ - $ - Asphalt Treated Base, 4" thick $ 14.00 SY $ - $ - Gravel Base Course 2" $ 7.50 SY $ - $ - Gravel Base Course 4" $ 15.00 SY $ - $ - Gravel Base Course 6" $ 22.50 SY $ - 466 $ 10,485.00 Gravel Road, 4" rock, First 2500 SY $ 15.00 SY $ - $ - Gravel Road, 4" rock, Qty. over 2500 SY $ 11.00 SY $ - $ - Concrete Road, 5", no base, over 2500 S$ 22.00 SY $ - $ - Concrete Road, 6", no base, over 2500 $ 32.00 SY $ - $ - Thickened Edge $ 11.00 LF $ - $ - WRITE-IN-ITEMS $ - $ - $ - $ - $ - $ - $ - $ - $ - Subtotal $ - Subtotal $ 17,475.00 Rev 7/2017 CONSTRUCTION CALCULATION WORKSHEET WATER SYSTEM Public Improvements Private Development Description Unit Price Unit Quantity Cost Quantity Cost Blowoff $ 1,800.00 EACH $ - $ - Connection to Existing Water Main $ 2,000.00 EACH $ - $ - Ductile Iron Watermain, CL 52, 6 Inch Dia $ 65.00 LF $ - $ - Ductile Iron Watermain, CL 52, 8 Inch Dia $ 85.00 LF $ - $ - Ductile Iron Watermain, CL 52, 10 Inch Dia $ 103.00 LF $ - $ - Ductile Iron Watermain, CL 52, 12 Inch Dia. $ 125.00 LF $ - $ - Gate Valve, 6 inch Dia $ 250.00 EACH $ - $ - Gate Valve, 8 Inch Dia $ 380.00 EACH $ - $ - Gate Valve, 10 Inch Dia $ 425.00 EACH $ - $ - Gate Valve, 12 Inch Dia $ 500.00 EACH $ - $ - Fire Hydrant Assembly, with Guard Posts $ 3,000.00 EACH $ - $ - Fire Hydrant Assembly, without Guard Posts $ 2,500.00 EACH $ - $ - Air-Vac, 8 Inch Dia $ 6,000.00 EACH $ - $ - Air-Vac,10 Inch Dia $ 7,500.00 EACH $ - $ - Air-Vac, 12 Inch Dia $ 12,000.00 EACH $ - $ - Pressure Reducing Valve Assembly, 8 In. Dia $ 3,800.00 EACH $ - $ - Pressure Reducing Valve Assembly, 10 In. D $ 4,200.00 EACH $ - $ - Pressure Reducing Valve Assembly, 12 In. D $ 5,000.00 EACH $ - $ - Valve Marker Post $ 350.00 EACH $ - $ - WRITE-IN-ITEMS $ - $ - $ - $ - $ - $ - $ - $ - Subtotal $ - Subtotal $ - Rev 7/2017 CONSTRUCTION CALCULATION WORKSHEET SANITARY SEWER Public Improvements Private Development Description Unit Price Unit Quantity Cost Quantity Cost Connection to Existing Sewer Main $ - EACH $ - $ - Clean Outs $ 500.00 EACH $ - $ - Grease Interceptor, 500 gallon $ 6,000.00 EACH $ - $ - Grease Interceptor, 1000 gallon $ 10,000.00 EACH $ - $ - Grease Interceptor, 1500 gallon $ 15,000.00 EACH $ - $ - Side Sewer Pipe, PVC. 4 Inch Dia $ 8.00 LF $ - $ - Side Sewer Pipe, PVC. 6 Inch Dia $ 12.00 LF $ - $ - Sewer Pipe, PVC, 8 inch Dia $ 33.00 LF $ - $ - Sewer Pipe, PVC, 12 Inch Dia $ 41.00 LF $ - $ - Sewer Pipe, PVC, ____ Inch Dia $ - LF $ - $ - Lift Station (Entire System) $ - LS $ - $ - Manhole, 48 Inch Dia $ 3,000.00 EACH $ - $ - for additional depth over 4 feet/per foo$ 532.00 FEET $ - $ - Manhole, 54 Inch Dia $ 3,500.00 EACH $ - $ - for additional depth over 4 feet/per fo $ 532.00 FEET $ - $ - Manhole, 60 Inch Dia $ 3,700.00 EACH $ - $ - for additional depth over 4 feet/per fo $ 532.00 FEET $ - $ - Manhole, 72 Inch Dia $ 4,000.00 EACH $ - $ - for additional depth over 4 feet/per foo$ 625.00 FEET $ - $ - Manhole, 96 Inch Dia $ 5,000.00 EACH $ - $ - for additional depth over 4 feet/per foo $ 625.00 FEET $ - $ - Outside Drop $ - LS $ - $ - Inside Drop $ - LS $ - $ - Pipe, C-900 $ 90.00 LF $ - $ - Pipe, High Density Water Pipe (HDWP) $ 160.00 LF $ - $ - WRITE-IN-ITEMS $ - $ - $ - $ - $ - $ - $ - $ - $ - Subtotal $ - Subtotal $ - Rev 7/2017 CONSTRUCTION CALCULATION WORKSHEET LANDSCAPING & VEGETATION Include Public Improvements & Private Development Description Unit Price Unit Quantity Cost Street Trees EACH $ - Root Barrier EACH $ - Median Landscaping $ - LS $ - Right-of-Way Landscaping $ - LS $ - Wetland Landscaping $ - LS $ - Private Landscaping LS 1 $ 8,600.00 WRITE-IN-ITEMS $ - $ - $ - $ - $ - $ - Subtotal $ 8,600.00 (INCLUDES GENERAL, STREET, SURFACING, WATER, PUBLIC PRIVATE SEWER, LANDSCAPING) SUBTOTAL $ 8,600.00 $ 27,413.50 MOBILIZATION 10%: $ 860.00 $ 2,741.35 CONTINGENCY 15%: $ 1,290.00 $ 4,112.03 GRANDTOTAL: $ 10,750.00 $ 34,266.88 Rev 7/2017 u vwxxyz{||}~Â€ÂÂ‚Â€ÂƒÂ„ |Â† -./0123.45.67846-5224 9:;9<=>?@A B7C 2@ D0<EFEG HIFJ:;HJH9;G !" .5K/-.K4L@ !#! $% !$%& ' ()*+, -./0123.45.67846-5224 M!'%(N '+,OP, IF:<<9I9G 2QRQ 2Q SQ?Q@4R ;<6=>2? @5.:>;<6 A% !B " !C!% ! 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C!" 1DE1FG-H4F-I.JG1EKL.E *0+# *6 ()*))##5+ )*/ (+'# *6 ()*))##5+ )*/ /.+/)# *6 ()*))##5+ )*/ ,*+# *6 ()*))##5+ )*/ /.+/# *6 ()*))##5+ )*/ $...*)' *6 #()*))# 5+)*/ 9:;<=>?>@#A<:BC<##DEF#GHIJKLM#NOPMQHGHN#RMORJM#HOS#QMNGTSMQML#UGSV#WMIQMSEQF#OX#WSESM# !"#$ % # 7*8#//**+#%+*+) # &'#()*))#%++,#*-+.*+#*)#// *0'1#$'#/#/#*.2# 343 # 242 Y ! "#$% &'()* ' ++, - For the best experience, open this PDF portfolio in Acrobat X or Adobe Reader X, or later. Get Adobe Reader Now! ABCDEFGHIJ Dear Policyholder, Thank you for choosing Federated Insurance to handle your insurance and risk management needs. The attached certificate document(s) have been issued or updated. Please feel free to contact us with any additional changes, additions or deletions that may be needed by contacting the Federated Client Contact Center at: E-mail: clientcontactcenter@fedins.com Phone: 1-888-333-4949 Fax: 507-446-4664 Thank you for your business! Client Contact Center Enclosed: Certificate Document(s) MISC-0829 (03-22) COMMERCIAL GENERAL LIABILITY CG 20 33 12 19 THIS ENDORSEMENT CHANGES THE POLICY. PLEASE READ IT CAREFULLY. ADDITIONAL INSURED - OWNERS, LESSEES OR CONTRACTORS - AUTOMATIC STATUS WHEN REQUIRED IN A WRITTEN CONSTRUCTION AGREEMENT WITH YOU This endorsement modifies insurance provided under the following: COMMERCIAL GENERAL LIABILITY COVERAGE PART A. Section II - Who Is An Insured is amended to B. With respect to the insurance afforded to these include as an additional insured any person or additional insureds, the following additional organization for whom you are performing exclusions apply: operations when you and such person or This insurance does not apply to: organization have agreed in writing in a contract 1. "Bodily injury", "property damage" or or agreement that such person or organization be "personal and advertising injury" arising out added as an additional insured on your policy. of the rendering of, or the failure to render, Such person or organization is an additional any professional architectural, engineering or insured only with respect to liability for "bodily surveying services, including: injury", "property damage" or "personal and advertising injury" caused, in whole or in part, by: a. The preparing, approving, or failing to prepare or approve, maps, shop drawings, 1. Your acts or omissions; or opinions, reports, surveys, field orders, 2. The acts or omissions of those acting on your change orders or drawings and behalf; specifications; or in the performance of your ongoing operations for b. Supervisory, inspection, architectural or the additional insured. engineering activities. However, the insurance afforded to such This exclusion applies even if the claims additional insured: against any insured allege negligence or other 1. Only applies to the extent permitted by law; wrongdoing in the supervision, hiring, and employment, training or monitoring of others 2. Will not be broader than that which you are by that insured, if the "occurrence" which required by the contract or agreement to caused the "bodily injury" or "property provide for such additional insured. damage", or the offense which caused the "personal and advertising injury", involved the A person's or organization's status as an rendering of or the failure to render any additional insured under this endorsement ends professional architectural, engineering or when your operations for that additional insured surveying services. are completed. Â© Insurance Services Office, Inc., 2018 Page 1 of 2 CG 20 33 12 19 Policy Number: 1831264 Transaction Effective Date: 05/01/2023 2. "Bodily injury" or "property damage" C. With respect to the insurance afforded to these occurring after: additional insureds, the following is added to a. All work, including materials, parts or Section III - Limits Of Insurance: equipment furnished in connection with The most we will pay on behalf of the additional such work, on the project (other than insured is the amount of insurance: service, maintenance or repairs) to be 1. Required by the contract or agreement you performed by or on behalf of the additional have entered into with the additional insured; insured(s) at the location of the covered or operations has been completed; or 2. Available under the applicable limits of b. That portion of "your work" out of which insurance; the injury or damage arises has been put whichever is less. to its intended use by any person or organization other than another contractor This endorsement shall not increase the or subcontractor engaged in performing applicable limits of insurance. operations for a principal as a part of the same project. Page 2 of 2 Â© Insurance Services Office, Inc., 2018 CG 20 33 12 19 Policy Number: 1831264 Transaction Effective Date: 05/01/2023 ABCDEFGHIJ Dear Policyholder, Thank you for choosing Federated Insurance to handle your insurance and risk management needs. We have issued the enclosed certificate(s) of insurance to the certificate holder(s). Copies have been provided for your files. Should you have any immediate certificate of insurance service needs, or need to change, add, or delete a certificate issued on your behalf, please contact the Client Contact Center at: Phone: 1-888-333-4949 Fax: 507-446-4664 E-mail: clientcontactcenter@fedins.com Thank you for your business! Client Contact Center Enclosed: Certificate(s) of Insurance MISC-0828 (03-22) COMMERCIAL GENERAL LIABILITY CG 20 33 12 19 THIS ENDORSEMENT CHANGES THE POLICY. PLEASE READ IT CAREFULLY. ADDITIONAL INSURED - OWNERS, LESSEES OR CONTRACTORS - AUTOMATIC STATUS WHEN REQUIRED IN A WRITTEN CONSTRUCTION AGREEMENT WITH YOU This endorsement modifies insurance provided under the following: COMMERCIAL GENERAL LIABILITY COVERAGE PART A. Section II - Who Is An Insured is amended to B. With respect to the insurance afforded to these include as an additional insured any person or additional insureds, the following additional organization for whom you are performing exclusions apply: operations when you and such person or This insurance does not apply to: organization have agreed in writing in a contract 1. "Bodily injury", "property damage" or or agreement that such person or organization be "personal and advertising injury" arising out of added as an additional insured on your policy. the rendering of, or the failure to render, any Such person or organization is an additional professional architectural, engineering or insured only with respect to liability for "bodily surveying services, including: injury", "property damage" or "personal and advertising injury" caused, in whole or in part, by: a. The preparing, approving, or failing to prepare or approve, maps, shop drawings, 1. Your acts or omissions; or opinions, reports, surveys, field orders, 2. The acts or omissions of those acting on your change orders or drawings and behalf; specifications; or in the performance of your ongoing operations for b. Supervisory, inspection, architectural or the additional insured. engineering activities. However, the insurance afforded to such This exclusion applies even if the claims additional insured: against any insured allege negligence or other 1. Only applies to the extent permitted by law; wrongdoing in the supervision, hiring, and employment, training or monitoring of others 2. Will not be broader than that which you are by that insured, if the "occurrence" which required by the contract or agreement to caused the "bodily injury" or "property provide for such additional insured. damage", or the offense which caused the "personal and advertising injury", involved the A person's or organization's status as an rendering of or the failure to render any additional insured under this endorsement ends professional architectural, engineering or when your operations for that additional insured surveying services. are completed. Â© Insurance Services Office, Inc., 2018 Page 1 of 2 CG 20 33 12 19 Policy Number: 1831264 Transaction Effective Date: 05/01/2024 2. "Bodily injury" or "property damage" C. With respect to the insurance afforded to these occurring after: additional insureds, the following is added to a. All work, including materials, parts or Section III - Limits Of Insurance: equipment furnished in connection with The most we will pay on behalf of the additional such work, on the project (other than insured is the amount of insurance: service, maintenance or repairs) to be 1. Required by the contract or agreement you performed by or on behalf of the additional have entered into with the additional insured; insured(s) at the location of the covered or operations has been completed; or 2. Available under the applicable limits of b. That portion of "your work" out of which insurance; the injury or damage arises has been put whichever is less. to its intended use by any person or organization other than another contractor This endorsement shall not increase the or subcontractor engaged in performing applicable limits of insurance. operations for a principal as a part of the same project. Page 2 of 2 Â© Insurance Services Office, Inc., 2018 CG 20 33 12 19 Policy Number: 1831264 Transaction Effective Date: 05/01/2024 For the best experience, open this PDF portfolio in Acrobat X or Adobe Reader X, or later. Get Adobe Reader Now! PRE-CONSTRUCTION MEETING AGENDA Community and Economic Development City of Arlington â€¢ 18204 59th Avenue NE â€¢ Arlington, WA 98223 â€¢ Phone (360) 403 3551 Project Name: Stillaguamish Square Parking Expansion Project No.:PWD3456 Date: 05/07/24 Contractor: Ismaelâ€™s Construction LLC Superintendent: Ismael Rodriguez Ph. No.: 425-740-4809 The purpose of this meeting is to provide the most common inspections and noteworthy information. This meeting is not intended to be all-encompassing. It is the responsibility of the Owner, Developer and Contractor to adhere to the approved plans, verify compliance with the City of Arlington Municipal Code, Public Works Design and Construction Standards, International Code Council (ICC), applicable local, state and federal requirements or any order, proclamation, guidance or decision of the Governor. INSPECTIONS â€¢ INSPECTIONS (360-403-3417) MUST BE CALLED IN BEFORE 3:30 PM TO BE ON THE NEXT BUSINESS DAY INSPECTION SCHEDULE â€¢ Inspections are Monday-Friday with exception of Local, State or Federal Holidays. Building, Storm and Civil Inspections - 8 am to 4:30 pm; Water or Sewer inspections - 8:00 am to 3:30 pm â€¢ To cancel or modify an inspection - Building, Storm or Civil call 360-403-3433; Water or Sewer call 360-403-3526 â€¢ It is the responsibility of the Owner, Developer and Contractor to call and arrange for appropriate inspections. Onsite tailgate meetings are advised with each individual inspector prior to installation of their related facilities with those persons who are actually performing the work. â€¢ Failure to call for inspection may result in work being left exposed and/or removed and reconstructed â€¢ Re-inspections may be charged at $127.00 per hour, Â½ hour minimum for failure to call for inspection. Submittal Documents ï² ïƒ¾ Contractor contacts and 24 hr. emergency numbers: Ismael ïƒ¾ Copies of other agency permits or proof that the Rodriguez 425-740-4809 application is in progress: N/A ïƒ¾ Proof of insurance listing the City of Arlington as additional ïƒ¾ One week prior to the pre-construction insured: 1831264 meeting. Submittals for all materials and ïƒ¾ subcontractor approvals: DISCUSS AT PRE-CON Performance Bond must be on file: 1600109258 AS NECESSARY ïƒ¾ Contractorâ€™s License: â€“ Exp: ISMAECL901CQ Exp. 02/18/2026 ïƒ¾ City of Arlington Business License: # 602991617 ïƒ¾ Testing Company Name and Contact Information: N/A CESCL Name: Ismael Rodriguez ïƒ¾ CESCL#: Exp.: Uncertified Responsible Party ï² Drafts of easements and dedications must be in for review: ~Need separate legal and exhibit map for City Council Approval â€“ REQUIRED WITH AS-BUILT SUBMITTAL ïƒ¾ Contact State Historical Preservation Officer and Stillaguamish Tribe if required per Land Use Permit Dept. of Archaeology Historic Preservation Stillaguamish Tribe of Indians - THPO@stillaguamish.com 360-586-3065 Kerry Lyste Ph.: 360-572-3072; klyste@stillaguamish,.com Sam Barr Ph.: 360 -622-7055; sbarr@stillaguamish.com ïƒ¾ Department of Ecology Permit WAR # N/A DOE reporting is required. ïƒ¾ City of Arlington Design and Construction Standards and Specifications. (Available online) ïƒ¾ Construction Work Hours â€“ Monday â€“ Saturday 7 am to 7pm. No Sundays City recognized or Federal Holidays UPCOMING HOLIDAYS â€“ SEE FULL LIST OF 2024 FEDERAL HOLIDAYS ï² Binders and approved plans shall be kept onsite ïƒ¾ As-built plans will be required â€“ submit contractor redlined plans with as-built submittal PERMIT EXPIRATION: Per Arlington Municipal Code 20.16.280 Land Use Permits shall expire automatically if , within two years after the issuance of such permits: (1) The use authorized by such permits has not commenced, in circumstances where no substantial construction, erection, alteration, excavation, demolition or similar work is necessary before commencement of such use, or (2) Less than ten percent of the total cost of all construction, erection, alteration, excavation, demolition, or similar work on any development authorized by such permits has been completed on the site. Approved civil permits issued by the Community and Economic Development Department shall expire and become null and void if the work authorized by such permit has not commenced within eighteen months from the date of signature on the approved civil plans. A civil construction permit may be extended for an additional six months under the following conditions: â€¢ The permit has not expired. â€¢ The request for extension shall be made to the Community and Economic Development Department in writing at least at least thirty calendar days prior to the permit expiration date. â€¢ The work approved with the civil permit is actively under construction and the permit recipient has proceeded with due diligence and in good faith. o â€œActively under constructionâ€ means the construction activity on-site at the property related to the approved civil permit is taking place without pause, interruption, or suspension. â€¢ Conditions of the permit have not changed so substantially as to warrant a new application. Permit extensions are subject to the fee as set by resolution for the processing of extensions. No permit shall be extended more than once. All civil permits that have expired after eighteen months and an extension was not requested or granted are required to provide a new submittal and full civil review fees. Issued building permits shall expire and become invalid unless the work on the site authorized by such permit is commenced within 180 days after issuance, or if the work authorized on the site by a permit is suspended or abandoned for 180 days after the time of work is commenced. The 180 days will be deemed to have expired if no inspections have been performed within 180 days of the date of permit issuance. For an inspection to be valid, the work being inspected must be complete, ready for inspection and noted â€œapprovedâ€ by the building official. If the work authorized by the permit has been abandoned or suspended for 180 days before such work may recommence, a new building permit shall be obtained with a fee one-half of the building permit fee amount required for a new building permit. This only applies provided no changes have been made or will be made to the original plans and specifications for such work and provided further that such suspension or abandonment has not exceeded one year. Any permittee holding an unexpired building permit may apply for an extension of time when the permittee is unable to complete the work within the initial 180 days. The request for an extension of time shall be submitted to the Community and Economic Development Department at a minimum of thirty calendar days prior to the expiration of the permit. The building official may extend the time for action by the permittee for a period not exceeding 180 days. Written request by the permittee shall detail the circumstances beyond the control of the permittee that have prevented action from being taken. No permit shall be extended more than once. Page 2 of 6 REV6.2021 MISCELLANEOUS: 1. Bulk Hydrant Use â€“ 360-403-3526 2. Call for Locates 3. Planting schedule and methods 4. Onsite inspection prior to and during planting 5. Inspect final grade for lawn installation (Hydro-seed/sod) 6. Verify root barrier installation 7. Planting methods & before planting mulch installation 8. Staking & top mulch installation GENERAL CIVIL AND STORM DRAINAGE REQUIREMENTS: 9. Keep road clean and overall site. 10. Dust control required. 11. Maintain construction entrance â€“ use railroad ballast â€“ no spawls. 12. Silt fence as needed â€“ contact for tailgate discussion. 13. All grouting shall be inspected inside and out. 14. Sand collars required unless otherwise specified. 15. All risers to be wet set and mudded inside and out. 16. All infiltration areas to be inspected before cover. 17. Provide protection for all infiltrating materials / amended soils, railroad ballast, drain rock 18. ECO Pans required for concrete clean up or approved wash down area with water tight containment. 19. Roadway pavement patches for cuts in City right of way shall be per COA Standard Detail R-140. Only for trenching within the roadway prism. No CDF is allowed for subgrade backfill. 20. A Traffic Control Plan shall be submitted and approved prior to any work within the public Right of Way. 21. Landscaping â€“ root barriers are required per Standard Detail R-270. 22. CALL INSPECTION LINES AND NOT INDIVIDUAL CELL PHONES!! 23. Right of Way site plan and TCP is required for any right of way work. WSDOT TCP is acceptable or TCP per MUTCD. GENERAL UTILITY REQUIREMENTS: 24. Do not cover without inspection. 25. Maintain survey staking. 26. All pipe in ground shall be inspected before cover. 27. Take pictures. 28. Call if you have any questions. 29. No pipe received on site without the ends covered; covers will remain in place until installation. 30. Signed set of approved construction drawings will be on site. 31. General site maintenance - No garbage in the ditch; no fittings/pipe in the mud; fitting assembly in a clean area. 32. Maintain horizontal and vertical clearance with other utilities. 33. Maximum amount of open trench shall not exceed 100 feet. 34. Dropped and/or damaged pipe will be removed from the site and replaced. 35. High ground water a potential and dewatering plan may be required. De-watering pumps will need to be available and in good working condition if needed. 36. A Red Line copy of the construction drawings will be submitted to the COA at the project completion with the as-built plans. Page 3 of 6 REV6.2021 37. Tracer Tape is required over side sewer pipes, stubs and any undetectable pipe at 24 to 48 inches below finished grade extending the full length. GENERAL WATER REQUIREMENTS: 38. Irrigation requires a separate tap for irrigation or a variance can be requested; send to Ryan Morrison rmorrison@arlingtonwa.gov. 39. CDF not required but compaction shall be met. 40. Inspectors shall be contacted and pictures will be taken. 41. All service lines shall be 2 inches and reduced at meter. 42. No 2 inches setters will be installed without restraint rods/spacer (Spud) in place. No wood spacers. 43. Pipe handling - Anticipate low water flows for flushing, keep the pipe/fittings clean. Water tight plug shall be used. 44. Once fittings arrive on site they need to be verified that they conform to approved submittals/COA STD. 45. Reduced Pressure Backflow Assembly (RPBA) is required, preferably inside the building. The RPBA must be in line where the water enters the building. Placement of the RPBA is a minimum of 1 foot and a maximum of 5 feet from ground level. 46. Mega Lugs and Field Locks are required. 47. All valves to be in the closed position to prevent debris/water from entering pipe. 48. Heavy plastic (4 mil. min.) on all fittings prior the thrust blocking. 49. Pre-block and post-block inspections are required. An ecology block may be used with crushed rock backfill compacted to 95%, as needed. â€¢ Ecology Â½ block - 2â€™x2â€™x3â€™ (1900 lbs.); or â€¢ Ecology full block â€“ 2â€™x2â€™x6â€™ (3850 lbs.); or â€¢ Per standard detail W-160 thru W-175. 50. All Services will be flushed prior to testing or connecting to the check valve to prevent the check valve from damage. 51. What type of chlorination will you use? Disposal of the Super Chlorinated water? 52. Tie-in connections shall be less than 18 feet and swabbed with a chlorinated water solution of appropriate strength. 53. Water meter will not be set until connection fees have been paid. Contact the Permit Center for or apply online. 360-403-3551 or www.arlingtonwa.gov/254/Construction-Utility-Applications 54. Limited hydrant meters, PUD may supply. GENERAL SANITARY SEWER REQUIREMENTS 55. Inspectors will take pictures. 56. Side sewer pipe and stubs shall be 6 inches. 57. Bedding shall be 3/8 inch clean washed pea gravel or imported clean sand, 6 inches below pipe and 12 inches above pipe. 58. Cleanouts shall be placed 5 feet from the building where each sewer stub exits the building. Cleanouts are required every 100 feet, must be at grade with ring, cover and internal plug, not a cap. If a clean out is not located in a solid surface, it will require a concrete pad. 59. All grouting shall be inspected inside and out. 60. All risers to be wet set and mudded inside and out. Do not use Jet set. 61. Sanitary Sewer Pipe shall be cleaned and tested after backfilling by either exfiltration or low pressure air method. 62. Sewer main will be CCTV and inspector shall be onsite. 63. Clean outs will be a â€œYâ€ at 45Â°. Page 4 of 6 REV6.2021 64. Monitoring manhole (MMH) is required for each commercial use within the city. If multi-tenant, each unit needs to connect separately to a MMH. Maximum of three (3) units may connect to one (1) MMH. Detail SS-130. BUILDING REQUIREMENTS 65. Special Inspections 66. Wall/rockeries separate building permit 67. Field Revisions to Issued Permit â€“ Level 1: Minor changes that Inspectors may add to the approved building permit file. The inspector may also determine that a level 2 requirement is necessary based on the extent and complexity of the changes proposed. â€œMinor Changesâ€ would include small scale changes, such as: â€¢ Updates to floor plan with no increases in footprint, change of uses, or heights. â€¢ Minor structural changes from the engineer and/or designer of record; such as: o basic beam changes, o changes of covered porches, patios, o over framed areas from trusses to stick framed roofs w/50 psf. or less roof snow loads without roof pitch changes, o window changes without egress change, o minor footing/foundation adjustments). â€¢ All changes/modifications should be noted/documented on the permit file and as necessary within the permitting system. 68. Revisions to Issued Permit â€“ Level 2 New applications may be required for minor revisions where staff review is necessary for proposed revisions. Only 1 revision is allowed to any issued building permit. â€¢ Types of potential changes may include but are not limited to: o Reallocation of floor area use if it would include and/or cause an increase in bedroom count(s). o Site plan changes in orientation or location on a site without any structural changes. o Roof pitch changes. o Structural changes and alterations that would then require some type of building plan review. o Slight increases and/or adjustments to previously permitted details and/or features which would increase the area and/or footprint square footage, including, but not limited to: ï‚§ decks, ï‚§ covered porches/decks, ï‚§ existing room(s)/habitable space, ï‚§ garage â€¢ Increases shall not exceed 10% of the existing detail/floor area up to a maximum total of 250 sq. ft. â€¢ Increases and/or adjustments shall not create a nonconforming structure (e.g. setbacks, floodplain, critical area, shoreline, ADU limitations, or would create other type of nonconforming use). 69. Revisions to Issued Permit â€“ Level 3 Requirements for new Permit application and full review of Substantial Changes: Changes in the scope and scale of the structure and/or structural design that would necessitate a new permit. Page 5 of 6 REV6.2021 â€¢ â€œSubstantial Changesâ€ would include changes, such as: o Changing from wood to reinforced concrete or other change in the type of construction. o Changes in occupancy that require extensive changes to the construction and life safety design of the structure. o Altered projects resulting in a totally new configuration/layout. o A completely new design, new elements, and/or features not part of the original prior approved building permit. GENERAL REQUIREMENTS: 70. Permit numbers shall be added to all required reports and emailed to the following: â€¢ Kevin Olander â€“ kolander@arlingtonwa.gov 360-403-3433 â€¢ Brian Grieve- bgrieve@arlingtonwa.gov 360-403-3438 / 360-913-1396 (cell) â€¢ Permit Center â€“ ced@arlingtonwa.gov 360-403-3551 71. Utility General Contact Information: 360-403-3526 â€¢ Water Department Contact: o Gus Tararan â€“ gtararan@arlingotnwa.gov 425-754-7438 o Inspections â€“ 360-403-3526 â€¢ Wastewater Department Contact: o Joe Wilson â€“ jwilson@arlingotnwa.gov 425-754-7442 o Inspections â€“ 360-403-3508 72. Plan Revisions shall be submitted via hard copy to CED Department for review. â€¢ Two (2) copies of revised plans shall be required along with an electronic copy 73. Meeting Attendees: Page 6 of 6 REV6.2021 From: Brian Grieve To: Hannah Hardwick Cc: Brian Grieve Subject: Punch List - Stillaguamish Square Parking Expansion PWD#3456 Date: Friday, July 26, 2024 3:55:11 PM Attachments: Striping Note.pdf Hannah, Below is a punch list for the Stillaguamish Parking Expansion project. Fire Lane Striping needs to read â€œNo Parking - Fire Lane - Tow Away Zoneâ€. It currently only has â€œNo Parking - Fire Laneâ€. Add â€œTow Away Zoneâ€ to the fire lane curbs. Complete Landscaping Install dumpster enclosure doors Remove crosswalk striping where the access to the existing ADA stall was removed. See the attached pdf. Remove remaining erosion control devices (Final Item) Thanks, Brian City of Arlington Community & Economic Development July 26, 2024 Stillaguamish Square LLP 540 N West Ave Arlington, WA 98223 RE: Project Closeout Requirements Project Name: Stillaguamish Square- Parking Expansion Project Address: 540 N West Ave Project No.: PWD-3456 Hello Steve Barnes, Portions of the construction project are nearing completion. Prior to project completion and assignment of funds #1600109258 release, review and approval of all items related to the project closeout are required. 1. All punch list items shall be completed and approved (punch list attached); it is the responsibility of the Contractor to arrange reinspection of all punch list items. a. For all punch list items except water and sewer; contact Brian Grieve for reinspection: i. 360-913-1396 or bgrieve@arlingtonwa.gov. 2. As-Built plans: a. Plans shall adhere to the Public Works Design and Construction Standard 1-11. b. Shall include all public and private infrastructure, and right of way improvements c. Submit one (1) full paper set along with the electronic format (PDF) d. AutoCAD files will be required with As-Built plan final approval 3. Maintenance Bond: a. A 2-year maintenance bond is required. i. The City of Arlington maintenance bond form may be used; or ii. An Assignment of Funds b. Maintenance Bond Estimated Cost of Construction $10,750 x 20% = $2,150.00 Please feel free to reach out should you have any questions at 360-403-3551 or hhardwick@arlingtonwa.gov . Sincerely, Hannah Hardwick Permit Technician I Community & Economic Development