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HomeMy WebLinkAboutSWPPP Rec'd 2/20/24 Department epartment STATE OF O POR UNITY Environmental Cot"1Sery a bon, NYS Department of Environmental Conservation Division of Water 625 Broadway, 4th Floor Albany, New York 12233-3505 MS4 Stormwater Pollution Prevention Plan (SWPPP) Acceptance Form for Construction Activities Seeking Authorization Under SPDES General Permit *(NOTE: Attach Completed Form to Notice Of Intent and Submit to Address Above I. Project Owner/Operator Information 1. Owner/Operator Name: East End Holding Co., Inc. 2. Contact Person: Steven Martocello 3. Street Address P.O. Box 336 4. City/state/zip: Mt. Sinai, NY 11766 II. Project Site Information 5. Project/site Name: The Orchards 6. Street Address: 2595 Orchard Street 7. city/state/zip: Orient, NY 11957 III. Stormwater Pollution Prevention Plan (SWPPP) Review and Acceptance Information 8. SWPPP Reviewed by: 9. Title/Position. 10. Date Final SWPPP Reviewed and Accepted. IV. Regulated MS4 Information 11. Name of MS4. Town of Southold 12. MS4 SPDES Permit Identification Number: NYR20A 13. Contact Person: 14. Street Address: 15. City/State/Zip: 16. Telephone Number: Page 1 of 2 MS4 SWPPP Acceptance Form - continued V. Certification Statement-MS4 Official (principal executive officer or ranking elected official) or Duly Authorized Representative hereby certify that the final Stormwater Pollution Prevention Plan (SWPPP) for the construction project identified in question 5 has been reviewed and meets the substantive requirements in the SPDES General Permit For Stormwater Discharges from Municipal Separate Storm Sewer Systems(MS4s). Note: The MS4, through the acceptance of the SWPPP, assumes no responsibility for the accuracy and adequacy of the design included in the SWPPP. In addition, review and acceptance of the SWPPP by the MS4 does not relieve the owner/operator or their SWPPP preparer of responsibility or liability for errors or omissions in the plan. Printed Name: Title/Position: Signature: Date: VI.Additional Information (NYS DEC -MS4 SWPPP Acceptance Form -January 2015) Page 2 of 2 STORM WATER POLLUTION PREVENTION PLAN FOR CONSTRUCTION AT 2595 ORCHARD STREET, ORIENT, NY Prepared for East End Holding Co.,LLC February 16,2024 Prepared by: Lahti Engineering and Environmental Consulting, P.C. 2168-318 Nesconset Hwy. Stony Brook, NY 11790 (631) 751-6433 Lahtieng@aol.com Project#16-028 SWPPP Storm Water Pollution Prevention Plan for Construction Activities I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information,the information is,to the best of my knowledge and belief, true, accurate and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Digitally signed by William J.Lahti William J. Lahti DN:emaicn.:WllliamJ.Lahti,o,ou, l:��aatatierrcJaoLcom,c=US Date:2024.02.16 09:25:00-05'00' William J.Lahti, P.E. Project Engineer SITE CONTACT INFORMATION SITE OWNER PI]ONEIFAXIMOBILE ADDRESS East End Holding Co.,LLC 917-502-0101 P.O.Box 336 Mt. Sinai,AT 11766 PROTECT CONTRACTOR To Be Determined PROTECTEROSIONLEAD 24-HOUR CONTACT To Be Determined 2595 Orchard St.,Orient Storm Water Pollution Prevention Plan for Construction Activities Revision Schedule This storm water pollution prevention plan (SWPPP) should be revised and updated to address changes in site conditions, new or revised government regulations, and additional on-site storm water pollution controls. All revisions to the SWPPP must be documented on the SWPPP Revision Documentation Form, which should include the information shown below. The authorized facility representative who approves the SWPPP should be an individual at or near the top of the facility's management organization, such as the president, vice president, construction manager, site supervisor, or environmental manager. The signature of this representative attests that the SWPPP revision information is true and accurate. Previous authors and facility representatives are not responsible for the revisions. SWPPP Revision Documentation Form Company Number Date Author Representative Signature 0 1 2 3 4 5 6 7 8 9 10 2595 Orchard St.,Orient CONTENTS 1 CONSTRUCTION ENVIRONMENTAL SUMMARY 1-1 1.1 Summary 1-1 1.1.1 Project Description 1-2 1.1.2 Existing Site Conditions 1-3 1.1.3 Adjacent Areas 1-3 1.1.4 Critical Areas 1-4 1.1.5 Soils 1-4 1.1.6 Erosion Problem Areas 1-4 1.1.7 Construction Phasing 1-4 L L 8 Construction Schedule 1-5 1.1.9 Financial/Ownership Responsibilities 1-5 1.1.10 Engineering Calculations 1-5 2 INTRODUCTION 2-1 2.1 Storm Water Pollution Prevention Plan Requirements 2-1 2.2 Purpose 2-1 2.3 SWPPP Organization 2-1 3 CLEARING LIMITS 3-1 3.1 Site Plans 3-1 3.2 Marking Clearing Limits 3-1 3.3 Special Consideration 3-1 3.4 Selected BMPs 3-1 4 CONSTRUCTION ACCESS 4-1 4.1 Site Access 4-1 4.2 Street Cleaning 4-1 4.3 Wheel Wash 4-2 4.4 Selected BMPs 4-2 5 STORM WATER DETENTION 5-1 5.1 Primary Storm Water Detention System 5-1 5.2 Run-on Bypass 5-1 5.3 Selected BMPs 5-2 2595 Orchard St.,Orient iv 6 SEDIMENT CONTROLS 6-1 6.1 Site Sediment Control System 6-1 6.2 Selected BMPs 6-1 7 SOIL STABILIZATION 7-1 7.1 Soil Stabilization 7-1 7.2 Structural BMPs 7-2 7.3 Selected BMPs 7-3 8 SLOPE PROTECTION 8-1 8.1 General Practices 8-1 8.2 Selected BMPs 8-1 9 DRAIN INLET PROTECTION 9-1 9.1 Existing Storm Drains 9-1 9.2 Newly Constructed Storm Drains 9-1 9.3 Selected BMP 9-1 10 STORM WATER OUTLET PROTECTION 10-1 11 SPILL PREVENTION AND RESPONSE 11-1 11.1 General Materials Handling Practices 11-1 11.2 Specific Materials Handling Practices 11-2 11.3 Spill Response 11-2 11.4 Notification 11-4 12 STORM WATER TREATMENT 12-1 12.1 Storm Water Collection System 12-1 12.2 Temporary Sediment Traps 12-1 13 BMP MAINTENANCE 13-1 14 PROJECT MANAGEMENT 14-1 14.1 Phasing of Construction 14-1 14.2 Seasonal Work 14-1 14.3 Training 14-2 14.4 Pre-construction Conference 14-2 14.5 Coordination with Utilities and other Contractors 14-2 14.6 Subcontractor Oversight 14-2 14.7 Monitoring/Reporting 14-2 2595 Orchard St.,Orient v 14.8 SWPPP Update 14-2 FIGURES APPENDIX A STANDARDS AND SPECIFICATIONS FOR SELECTED BMPs 2595 Orchard St.,Orient Vi Storm Water Pollution Prevention Plan for Construction Activities 1 CONSTRUCTION ENVIRONMENTAL SUMMARY 1.1 Summary This Stormwater Pollution Prevention Plan (SWPPP) is prepared to allow the proposed project to be covered under New York State Department of Environmental Conservation (NYSDEC) SPDES General Permit for Stormwater Discharges from Construction Activity GP-0-20-001 effective January 29, 2020, expiring January 28, 2025. East End Holding Co., LLC shall be constructing a residential subdivision. The site is located at 2595 Orchard St., Orient (Suffolk County). The subject property is 13.303 acres of land. The site is currently undeveloped. In accordance with requirements imposed by the Town of Southold, the majority of the site area (7.985 acres) shall be subject to an open space conservation easement and is intended to be used for crop farming. The crop farmland area is not subject to the SWPPP as the act of crop farming is not defined as a "construction activity". Within the 7.985 acres of crop farmland, 0.477 acres has been set aside for potential construction of a barn. As per Table 1 in Appendix B of GP-0-20-001, potential future construction of the barn is not subject to the SWPPP as less than one acre of land will be disturbed and the proposed structure is an agricultural building. The remaining site area shall be utilized for creation of five single family residential home building lots. A private right-of-way shall be constructed for accessing four residential building lots located on the easterly portion of the subject property. All five residential building lots are subject to Town of Southold imposed clearing\ limits (maximum 50% of lot area). In addition, the four easterly residential building lots are subject to buffer requirements so as to maintain a significant portion of the four parcels in a naturally vegetated condition. East End Holding Co., LLC intends on constructing the private right-of-way and off-site electric fire well. Each building parcel will be sold off and developed by the purchaser. The overall development plan is subject to this SWPPP. The work being performed by East End Holding Co., Inc. shall be completed in one phase as soon as the Town of Southold issues final approval for the subdivision, which is anticipated to be in summer 2024. The single phase construction is estimated to be complete within 1 month from the date construction begins. In accordance with,Appendix B Table 1 of GP-0-20-001 titled "Construction Activities that Require the Preparation of a SWPPP That Only Includes Erosion and Sediment 2595 Orchard St.,Orient 1-1 Storm Water Pollution Prevention Plan for Construction Activities Controls", this SWPPP will not include post-construction stormwater management practices as: • The project is construction of a single family residential subdivision that disturbs between 1 and 5 acres, and has less than 25% of impervious cover at total build- out • The subject property is not located in a watershed identified in Appendix C of GP- 0-20-001 • The subject property does not directly discharge to a 303(d) segment identified in Appendix E of GP-0-20-001 The site does not directly abut any surface water features. The closest large surface natural water is Hallock/Long Beach Bay classified as SA waters by the NYSDEC. It is located approximately 0.35 miles east of the project area. The site is located over a sole source aquifer. Storm water discharge from the area being constructed, both during and after construction, shall not be altered from the existing conditions. Storm water discharged from the site will not directly impact surface waters but will, instead, be discharged back to the sub-surface aquifer on-site through the use of proposed stormwater leaching pools and percolation through the pervious surface. In order to mitigate any potential impact to the environment due to storm water runoff, protective measures have been established to ensure there are no adverse effects to water quality in the surrounding area. This Storm Water Pollution Prevention Plan details all of the protective environmental measures which will be employed during construction of the project. 1.1.1 Project Description The total subject property is 13.303 acres in size. The majority of the property area(7.985 acres) is subject to an open space conservation easement. The open space conservation easement area is intended to be used as agricultural land for crop farming. The remaining property area shall be divided to create five single family residential building lots. The lot sizes shall be: • Lot#1 —58,896 SF • Lot#2—40,306 SF • Lot#3 —44,792 SF • Lot#4—40,670 SF 2595 Orchard St.,Orient 1-2 Storm Water Pollution Prevention Plan for Construction Activities Lot#5 —39,590 SF In order to access lots 2 through 5, a private right-of-way consisting of 7,422 SF of property area is proposed. The Town of Southold has imposed conditions on the development that limit the amount of land area that can be disturbed on the five residential building lots. The maximum clearing limit for each of the five building lots is 50%. As such,the maximum amount of area that can be disturbed on the non-open space conservation easement portion of the property is 119,549 SF (2.744 acres). In addition to the maximum clearing limits set by the Town of Southold, building lots 2 through 5 are subject to buffer requirements wherein certain areas of each building lot must remain in a naturally vegetated condition. 1.1.2 Existing Site Conditions The five building lots are fully pervious, undeveloped land with ground cover consisting of small trees, bushes, and scrub brush. The existing grade of the lots is gently sloping. 1.1.3 Adjacent Areas The area abutting the subject property along the north property line is residential property developed with a single family homes. The abutting properties are generally at a lower elevation than the subject property. The area abutting the subject property along the east property line is an undeveloped narrow strip of land covered with scrub brush that is part of the residential property abutting the subject property at the northeast corner. The abutting property is generally at the same elevation as the subject property. The area abutting the subject property along the south property line consists of a pervious, grassy strip of land that is part of the Orchard Street public right-of-way. The abutting area is generally at a slightly higher elevation than the subject property. The area abutting the subject property along the west property line varies depending on which proposed building lot is being evaluated. For building lot#1,the abutting property is undeveloped, pervious, vegetated land. For the easterly portion of the subject property where building lots 2 through 5 are located,the abutting property consists of the open- space conservation easement portion of the subject property that will be used for crop farming, and a single family residential parcel. The crop farmland and the residential parcel are generally sloped toward building lots 2 through 5. Run-on stormwater is not anticipated to occur in any appreciable volume. The properties abutting the subject property along the northern boundary are generally at a lower 2595 Orchard St.,Orient 1-3 Storm Water Pollution Prevention Plan for Construction Activities elevation than the subject property. The property abutting the subject property along the east boundary is generally at the same elevation as the subject property. The property abutting the subject property along the south boundary is at a slightly higher elevation than the subject property however it consists of pervious grass and vegetation where potential run-on stormwater can recharge to the subsurface. The property abutting the subject property along the westerly boundary consists of pervious vegetated ground cover that will allow percolation to occur before any significant amount of run-on stormwater can travel over the gently sloping terrain into the subject property. 1.1.4 Critical Areas There are no environmentally critical areas on or abutting the proposed construction area. 1.1.5 Soils Based on the "Soil Survey of Suffolk County,New York"published by the United States Department of Agriculture Soil Conservation Service in April 1975,the site project area is underlain by HaA soil. HaA soil is defined as Haven loam with 0 to 2 percent slopes. The soil group comprising the site is considered"well drained'. The soil hydrologic group classification is HSG `B'. Storm water that falls upon the disturbed areas generally does not result in significant run-off and tends to recharge to the subsurface. Based on soil borings performed at the subject property, groundwater is at a NAVD 88 elevation of 2 feet(subject to seasonal variations). 1.1.6 Erosion Problem Areas There are no areas around the project site where erosion could be anticipated to occur. The slopes are all gentle and the soils are well drained. 1.1.7 Construction Phasing The land disturbance portion of the project being constructed by East End Holding Co., LLC (i.e. the private right-of-way) shall be accomplished in one phase. Phasing for construction of the five building lots is unknown as East End Holding Co., LLC will be selling the individual lots to others for construction of the homes. The amount of time required to sell the lots, and the duration of time it will take for the owners to construct the homes, is not within the control of East End Holding Co., LLC. The SWPPP shall remain in effect until the entire project is constructed. 2595 Orchard St.,Orient 1-4 Storm Water Pollution Prevention Plan for Construction Activities 1.1.8 Construction Schedule Construction shall commence in summer 2024 (provided all necessary approvals have been obtained). It is anticipated the land disturbance portion of the project being constructed by East End Holding Co., LLC (i.e. the private right-of-way) shall last for 1 month. The construction schedule is subject to modification based on seasonal weather conditions and availability of resources. 1.1.9 Financial/Ownership Responsibilities The property is owned and controlled by East End Holding Co., LLC. If required,the owner shall issue a bond or financial surety to guarantee project completion. Outside contractors brought into the project that could impact erosion and sediment control efforts will be required to provide proof of insurance with the property owner to ensure any erosion and sediment impacts created by the contractor can be corrected. 1.1.10 Engineering Calculations In accordance with Section 4.2 of the draft May 2022 New York State Stormwater Management Design Manual, stormwater engineering calculations have been prepared for the proposed project. The water quality volume was calculated based on the equation: WQv =P * Rv * A/ 12 where: WQv =water quality volume in acre-feet P=90%Rainfall Event Number from Figure 4.1 Rv = 0.05 +0.009(I) where I is percent impervious cover A=contributing area in acres Based on Figure 4.1 of the draft May 2022 New York State Stormwater Management Design Manual,the 90th rainfall event number at the subject site is 1.5 inches. Pre-construction impervious cover=0% 2595 Orchard St.,Orient 1-5 Storm Water Pollution Prevention Plan for Construction Activities Post-construction impervious cover was estimated using the maximum allowable house footprint(assuming 2-story homes with covered porches)permitted by section 280-207 of the Town of Southold Zoning Code, and the anticipated configuration of the driveway, parking area, and sidewalk associated with each home. The computations of impervious area (where GFA is gross floor area as defined in the Town of Southold Zoning Code) are as follows: Lot 41 - 58,896 SF land area Maximum GFA= 5,100 SF +(5% * 18,896 SF)= 6,045 SF * Use 3,500 SF for impervious house footprint Driveway/Parking/Sidewalk=2,403 SF Total impervious area for lot#1 =3,500+2,403 = 5,903 SF Lot#2-40,306 SF land area Maximum GFA=5,100 SF+(5% * 306 SF) = 5,115 SF * Use 3,174 SF for impervious house footprint Driveway/Parking/Sidewalk= 1,760 SF Total impervious area for lot#2=3,174+ 1,760=4,934 SF Lot#3 -44,792 SF land area Maximum GFA= 5,100 SF+(5% * 4,792 SF)= 5,340 SF * Use 3,174 SF for impervious house footprint Driveway/Parking/Sidewalk=2,032 SF Total impervious area for lot#3 =3,174+2,032= 5,206 SF Lot#4-40,670 SF land area Maximum GFA= 5,100 SF+(5% * 670 SF)=5,134 SF * Use 3,174 SF for impervious house footprint Driveway/Parking/Sidewalk= 1,693 SF 1-6 2595 Orchard St.,Orient Storm Water Pollution Prevention Plan for Construction Activities Total impervious area for lot#4=3,174 + 1,693 = 4,867 SF Lot#5 -39,590 SF land area Maximum GFA=4,350 SF +(7.5% * 9,590 SF)= 5,069 SF * Use 3,174 SF for impervious house footprint Driveway/Parking/Sidewalk= 1,937 SF Total impervious area for lot 45 =3,174 + 1,937= 5,111 SF Right-of-Way Paved Portiog- Roadway impervious surfaces including curbing= 5,358 SF Driveway Aprons =292 SF Total impervious area for ROW=5,358 +292= 5,650 SF The total impervious surface area for the project is: 5,903 +4,934+5,206+4,867+5,111 + 5,650 = 31,671 SF=0.727 acres The contributory area is: 58,896+40,306+44,792 +40,670+ 39,590 + 5,650=229,904 SF =5.278 acres The percentage of impervious cover is: (31,671 SF/229,904 SF)= 13.8% Rv post-construction is therefore=0.05 +0.009 (13.8%)=0.174 WQv=P * Rv * A/ 12= [(1.5)(0.174)(5.278)] / 12 =0.115 acre-feet The Water Quality Volume for the site pre-construction is 0.000 acre-feet as the entire site is pervious ground cover. The Water Quality Volume for the site post-construction is 0.115 acre-feet. 2595 Orchard St.,Orient 1-7 Storm Water Pollution Prevention Plan for Construction Activities The post-construction water volume is being reduced by the implementation of several run-off reduction practices: 1.Right-of-way stormwater leaching pools: The proposed paved right-of-way will include installation of underground, precast concrete stormwater leaching pools. Stormwater run-off from the driveways/parking areas of building lots 42, #3,#4 and#5 shall flow to the private right-of-way. There will be five 10 foot diameter pools with a total ring depth of 25 feet. The stormwater leaching pools provide 1,710 cubic feet of runoff reduction capacity, which is 0.039 acre-feet of stormwater reduction capacity. 2.Stormwater leaching pools for house roofs: Each home will be constructed with stormwater leaching pools designed to accept runoff from the roofs. In accordance with Town of Southold requirements,the stormwater leaching pools shall be designed for a 2 inch rainfall. The maximum total roof area of the five proposed homes is 16,196 square feet. The minimum stormwater leaching pool capacity will therefore be 2,699 cubic feet,which is 0.062 acre feet. 3.Stormwater leaching pool for lot#1 driveway: The impervious driveway for lot#1 is estimated to be 1,971 SF. For a 2" rainfall,the required minimum size stormwater leaching pool is 10 foot diameter x 5 feet of ring height. The stormwater pool provides 342 cubic feet of retention capacity, which is 0.008 acre-feet. 4.Street tree planting: The Town of Southold is requiring planting of ten street trees on the subject property, along a portion of the private right-of-way. Three of the street trees will be planted within 10 horizontal feet of the impervious surface of the driveways on building lots 4 and 5. The driveway areas are 1,550 SF and 1,794 SF respectively. The proposed street trees shall have a minimum caliper of 2 inches, a mature tree canopy of greater than 16 feet in diameter, and the slope of the area adjacent to the tree pits shall not exceed 10%. In accordance with the NYSDEC Stormwater Design Manual Runoff Reduction Practice RR-3, an impervious area of 100 SF per tree may be deducted from the impervious contributory area. The Water Quality Volume reduction attributable to this practice is 0.009 acre-ft. The total runoff reduction being provided is: 0.039+0.062 +0.008 + 0.009=0.118 acre-feet The post-construction runoff reduction practices provide WQv volume in excess of the WQv created by the project(0.115 acre-feet). Therefore the WQv volume required by the NYSDEC SPDES General Permit for Stormwater Discharges from Construction Activity (GP-0-20-001) is provided. 2595 Orchard St.,Orient 1-8 Storm Water Pollution Prevention Plan for Construction Activities Channel Protection, overbank flood and extreme storm requirements are not applicable to this project as all the stormwater is contained on-site and recharged to the subsurface. The proposed grading plan retains all stormwater on the subject site. There is an increase in the post-construction stormwater discharge rate, all of which is held and discharged on-site via sub-surface percolation. There is no appreciable run-on stormwater within the project area. Currently storm water that falls upon the ground recharges to the sub-surface via infiltration. Storm water for the completed project shall be handled in the same manner except for the house roofs, driveways,parking areas, and private right-of-way where the stormwater is collected and routed to underground stormwater leaching pools for recharge to the subsurface. 1-9 2595 Orchard St.,Orient Storm Water Pollution Prevention Plan for Construction Activities 2 INTRODUCTION 2.1 Storm Water Pollution Prevention Plan Requirements This Storm Water Pollution Prevention Plan (SWPPP) was developed consistent with the requirements of the New York State Pollutant Discharge Elimination System (SPDES) program for Storm Water Permits for Construction Activities. The Plan, properly implemented, should result in the discharge of water to the environment without the violation of Water Quality Standards. 2.2 Purpose The purpose of this SWPPP is to: • Describe best management practices (BMPs) to minimize erosion and sediment runoff at the site • Identify, reduce, eliminate, or prevent the pollution of storm water • Prevent violations of surface water or groundwater quality standards 2.3 SWPPP Organization This plan consists of a detailed narrative section and the appendices, which contain illustrations, maps, and drawings. The narrative section includes descriptions of potential pollution problems associated with site features, and then discusses the selection of specific pollution prevention BMPs to reduce or eliminate the threat of causing pollution during the actual construction project. The illustrations, maps, and drawings in the appendices show the site location, topography, sensitive environmental receptors, placement of BMPs, and BMP specifications and performance expectations. The narrative section of this plan is organized in numbered sections around the 12 required elements of an SWPPP listed below: 1. Mark project clearing limits 2. Establishing the construction entrance(s) 2595 Orchard St.,Orient 2-1 Storm Water Pollution Prevention Plan for Construction Activities 3. Storm water detention 4. Selection and installation of sediment controls 5. Soil stabilization 6. Slope protection 7. Drain inlet protection 8. Storm water outlet protection 9. Chemical spill prevention and response 10. Site Storm water Treatment 11. BMP maintenance 12.Project management In the narrative section, each of the above elements will be discussed in relation to the specific conditions at the development. BMPs for each element will be screened, resulting in selection of those BMPs deemed most appropriate for use. Specifications and engineering drawings of the selected BMPs are referenced at the end of each section and can be found in Appendix A. 2595 Orchard St.,Orient 2-2 Storm Water Pollution Prevention Plan for Construction Activities 3 CLEARING LIMITS 3.1 Site Plans Figures 1 is a topographic map of the entire subject property prior to construction activities. The site has a natural grade such that stormwater run-off within the westerly section of the subject property flows in a generally northeast direction, and the easterly section of the property flows in a generally easterly direction... Figures 2 and 3 are the Storm Water Site Maps showing placement of all relevant storm water BMPs such as silt fences, construction entrances, and inlet protection. The figures do not illustrate surface water as there is none within the project site. 3.2 Marking Clearing Limits Prior to beginning earth-disturbing activities, including clearing and grading, all clearing limits, easements, setbacks, sensitive areas and their buffers, trees and drainage courses will be clearly marked to prevent environmental damage both on and off site. 3.3 Special Consideration There are no significant site features that warrant special consideration. 3.4 Selected BMPs The prime contractor shall preserve the natural vegetation to the maximum extent possible. Prior to commencing construction, the vegetated areas to be preserved shall be delineated with plastic, orange construction fence. The fence shall be set in place using temporary steel posts driven into the soil. Upon completion of construction, the fence and posts shall be removed. • BMP C101: Preserve Existing Vegetation • BMP C103: High Visibility Fence 2595 Orchard St.,Orient 3-1 Storm Water Pollution Prevention Plan for Construction Activities 4 CONSTRUCTION ACCESS 4.1 Site Access Two construction entrances are proposed. The first is located in the same location as the proposed pervious driveway serving building lot 41. The second is located in the same location as the private right-of-way that serves building lots #2 through 45. All heavy construction equipment shall enter/exit through these locations. 4.2 Street Cleaning Upon leaving the construction area for the private right-of-way, the construction vehicles must travel over a proposed stabilized construction access area. Sediment that may inadvertently be carried off the construction site via truck tires, etc. and carried out to Orchard Street shall be removed via shoveling and broom sweeping, at the end of each work day, by the contractor. The sediment shall be disposed of by placing it back into the project area. Upon leaving the construction area for building lot #1, the construction vehicles must travel over a pervious on-site gravel driveway that is approximately five hundred ninety feet long. Sediment that may inadvertently be carried off the construction site via truck tires, etc. and deposited in the pervious on-site gravel driveway, or carried out to Orchard Street, shall be removed via shoveling and broom sweeping, at the end of each work day, by the contractor. The sediment shall be disposed of by placing it back into the project area. Upon leaving the construction area for building lot #2, #3, #4 and #5, the construction vehicles must travel over the paved private right-of-way a minimum of one hundred twenty five feet. Sediment that may inadvertently be carried off the construction site via truck tires, etc. and deposited on the paved private right-of-way, or carried out to Orchard Street, shall be removed via shoveling and broom sweeping, at the end of each work day, by the contractor. The sediment shall be disposed of by placing it back into the project area. There are no existing catch basins on Orchard Street. The proposed catch basins and leaching pools within the private right-of-way shall be protected from sediment as described in the Erosion and Sedimentation Control Plan. 2595 Orchard St.,Orient 4-1 Storm Water Pollution Prevention Plan for Construction Activities 4.3 Wheel Wash The proposed stabilized construction exit onto Orchard Street, the proposed pervious gravel driveway for building lot#1, and the proposed asphalt paved private right-of-way to Orchard Street; should be sufficient to control off-site sediment carry-out. If these methods do not control the sediment carry-out problem, a temporary truck wheel wash station will be implemented. 4.4 Selected BMPs J • BMP C 105: Stabilized Construction Entrance • BMP C106: Wheel Wash 2595 Orchard St.,Orient 4-2 Storm Water Pollution Prevention Plan for Construction Activities 5 STORM WATER DETENTION 5.1 Primary Storm Water Detention System The project area both before and after construction, is sloped to contain all storm water contaminated,with sediment or otherwise affected by construction activities on-site and allow it to percolate into the sub-surface. The existing gentle slope of the westerly section of the subject property (location of building lot #1) directs stormwater flow into the open space conservation area (future crop farmland) that is part of the subject property. A silt fence shall be installed along the west property line in the location of the proposed paved driveway/parking area to provide an additional safeguard against storm water flowing off site into the neighboring property. Collected sediment, if any, shall be returned to the project area as fill. The existing gentle slope of the easterly section of the subject property (location of building lots #2, #3, #4 and#5) directs stormwater flow to the low lying area of building lots #3 and #5. Stormwater runoff from impervious areas of each building lot (i.e., house roofs and paved surfaces) is controlled via collection and discharge to on-site underground stormwater leaching pools. The paved private right-of-way stormwater runoff is directed to underground stormwater leaching pools installed within the right-of- way. The primary method of stormwater detention shall be underground stormwater leaching pools. The existing sub-surface recharge hydrology is being maintained. During construction, stormwater inlets shall be protected from sediment via use of stormwater inlet protection practices. 5.2 Run-on Bypass Run-on storm water is not anticipated to be an issue at this construction site. The abutting properties within close proximity to the subject property property lines are pervious, sloped away from the subject property, and/or have little to no slope toward the subject property. Stormwater falling upon the areas abutting the subject property is anticipated to recharge to the subsurface and/or evaporate before any appreciable amount of stormwater runs onto the subject property. Run-on bypass is not warranted. 2595 Orchard St.,Orient 5-1 Storm Water Pollution Prevention Plan for Construction Activities 5.3 Selected BMPs Various BMPs are referenced throughout this report. Drawings for selected BMPs have been included at the end of this report. • BMP C220: Storm Inlet Protection 2595 Orchard St.,Orient 5-2 Storm Water Pollution Prevention Plan for Construction Activities 6 SEDIMENT CONTROLS 6.1 Site Sediment Control System No discharge of storm water from the construction site to surface waters is planned. The nearest body of surface water is approximately 0.35 miles east of the subject property through highly pervious areas. All storm water shall be retained on site and allowed to percolate to the sub-surface through underground stormwater leaching pools. Since the sub-stratum of the site consists largely of sand, the native soil shall effectively serve as a sand filter to removal sediment as the storm water percolates into the sub- stratum.No clean storm water bypass is necessary for this site. 6.2 Selected BMPs �» BMP C232: Silt Fence 2595 Orchard St.,Orient _� 6-1 Storm Water Pollution Prevention Plan for Construction Activities 7 SOIL STABILIZATION This section describes the stabilization and structural BMPs that will be implemented to minimize erosion and transport of sediment from the project site into receiving waters. Erosion and sediment control facilities that are part of the project's work plan are shown in Figures 2 and 3. Many of the BMPs listed below are described in the "New York Standards and Specifications for Erosion and Sediment Control". The contractor should also consult the Erosion and Sedimentation Control Plan prepared for this project. 7.1 Soil Stabilization Stabilization BMPs to be implemented at this site include: * Soil Covering. All disturbed exposed soils in areas being constructed shall be stabilized with vegetation or covered prior to the onset of major rain events. The primary stabilization method used will be covering soils with an approved matting. This will be done on all slopes as well as drainage ditches, swales, and exposed flat surfaces as deemed necessary by the erosion and sediment control lead. Areas of the project, which have not been properly stabilized by vegetation by the onset of the wet season, will be covered with transparent plastic sheeting to prevent sediment transport. Plastic sheeting will also be used as an emergency BMP to cover previously stabilized areas which begin to erode. Loose straw and mulch covers are not to be used as they may be washed into drainage structures. The vast majority of the subject site is not being "constructed" and shall remain in its current pervious condition. * Stockpile Covering. All temporary soil stockpiles will be covered with plastic. Long-term stockpiles will be compacted and hydroseeded prior to the onset of wet weather. Long-term stockpiles are not anticipated to be necessary as the extent of construction is limited. Clean runoff from covered or stabilized stockpiles will be retained on site and dispersed to allow natural surface infiltration to occur. * Maintenance of Existing Vegetation. Existing and new vegetation will be maintained to the maximum extent practicable to prevent the contamination of storm water with sediment. Vegetated areas beginning to show signs of erosion or soil transport will be covered with plastic sheeting and the clean runoff conveyed to a storm water drain or dispersed to allow natural surface infiltration to occur. 2595 Orchard St.,Orient 7-1 Storm Water Pollution Prevention Plan for Construction Activities • Outlet Protection. Adequate energy dissipation, erosion control, and soil stabilization measures (e.g., rock or other energy dissipation techniques) will be provided for all point source discharges of storm water, including run-on discharges and outlets from on-site discharges.No such outlets are proposed for this project. • Inlet protection. All existing storm drain inlets, including those made operable during the project (if any), will be properly protected and maintained using approved inlet protection devices. 7.2 Structural BMPs Structural BMPs. Structural BMPs are practices designed to divert flows from exposed soil, store storm water runoff, and limit runoff and the discharge of pollutants from exposed areas of the project. The goal of structural BMPs on this project is to protect receiving water downstream of the site from turbid water, phosphorus, sediment, oil, and other contaminants, which may mobilize in storm water flows. • Temporarily Modified Catchment Structures. Catch basins, manholes, vaults and swales may have to be modified on a temporary basis so that dirty water can be intercepted before leaving the site. This may be done in several different ways generally resulting in temporarily blocking an outlet structure. No modifications are anticipated to be necessary, or planned, for this project. • Drainage Swales, Ditches, and Check Dams. Swales and ditches may be used on a temporary basis to convey storm water in a way that minimizes the potential for contamination by sediment. Because some sediment will always be present in storm water, check dams will be used in swales and ditches to reduce the velocity of the water and allow some settling of larger particles. • Temporary Slope Drains. In some cases unstable slopes may be temporarily covered with plastic to prevent erosion and to protect water quality. When soil is disturbed downstream of the covered slope, the slope drainage must be conveyed around the soil to prevent erosion. This can be done by collecting the slope runoff at the toe of the slope and piping it directly to the nearest drain. Solid-wall flexible drainpipe and sandbags are commonly used to create temporary slope drains. • Sedimentation Swales and Ponds. Temporary swales and small detention ponds may be used as necessary to reduce the velocity of runoff and enhance particle settling. • Infiltration/Dispersal Systems. This site has substantial areas of vegetation and porous soils. If necessary, storm water may be collected and pumped out onto the central core of the site (porous soil) for recharge to the sub-surface. This system 2595 Orchard St.,Orient 7-2 Storm Water Pollution Prevention Plan for Construction Activities would require a pump, conveyance piping, and dispersal piping. It is best to follow topographical contours when installing the dispersal piping to avoid ponding and channeling. Dirty water should be allowed to gravity settle at least 24 hours before dispersal to avoid clogging the infiltration area with sediment. 7.3 Selected BMPs • C 123 Plastic Covering 2595 Orchard St.,Orient 7-3 Storm Water Pollution Prevention Plan for Construction Activities 8 SLOPE PROTECTION 8.1 General Practices Soil types have been analyzed and considered for their potential to erode. There are no significantly sloped areas present at the construction site, nor are any planned. All sloped non-paved areas shall be stabilized and where appropriate, seeded and covered with straw mulch. Prior to the grass seed/plantings becoming established, the contractor shall use geotextile matting as necessary to ensure the slopes are not eroded away. Any grass seed washed away shall be reapplied and established before removing the slope protection. 8.2 Selected BMPs • C 122 Nets and blankets 2595 Orchard St.,Orient 8-1 Storm Water Pollution Prevention Plan for Construction Activities 9 DRAIN INLET PROTECTION 9.1 Existing Storm Drains There are no existing storm drain inlets present on site. 9.2 Newly Constructed Storm Drains There are new storm drains proposed within the private right-of-way project area. The storm drains with surface inlets shall be protected from,sediment infiltration. 9.3 Selected BMP o BMP C220: Storm Drain Inlet Protection 2595 Orchard St.,Orient 9-1 Storm Water Pollution Prevention Plan for Construction Activities 10 STORM WATER OUTLET PROTECTION This section is not applicable to the proposed construction project as there is no proposed surface water discharge point. Storm water shall be managed on-site via infiltration to the sub-surface via natural percolation. 2595 Orchard St.,Orient 10-1 Storm Water Pollution Prevention Plan for Construction Activities 11 SPILL PREVENTION AND RESPONSE Consistent with the general permit requirements, all potential pollutants other than sediment will be handled and disposed of in a manner that does not cause contamination of storm water. Non-sediment pollutants that may be present during construction activities include: • Petroleum products including fuel, lubricants, hydraulic fluids, and form oils • Concrete • Paints • Cleaners • Fertilizers These materials, and other materials used during construction with the potential to impact storm water, will be stored, managed, used, and disposed of in a manner that minimizes the potential for releases to the environment and especially into storm water. Emergency contacts for the project will be posted at the project office and are included at the end of this section. 11.1 General Materials Handling Practices The following general practices will be used throughout the project to reduce the potential for spills. • Potential pollutants will be stored and used in a secure location in a manner consistent with the manufacturer's instructions. To the extent practicable, material storage areas should not be located near storm drain inlets and should be equipped with covers, roofs, or secondary containment as needed to prevent storm water from contacting stored materials. Chemicals that are not compatible with each other shall be stored in segregated areas so that spilled materials cannot combine and react. • Materials disposal will be in accordance with the manufacturer's instructions and applicable local, state, and federal regulations. • Materials no longer required for construction will be removed from the site as soon as practicable. 2595 Orchard St.,Orient 11-1 Storm Water Pollution Prevention Plan for Construction Activities + Adequate garbage, construction waste, and sanitary waste handling and disposal facilities will be provided to the extent necessary to keep the site clear of obstructions and BMPs clear and functional. 11.2 Specific Materials Handling Practices • All pollutants, including waste materials and demolition debris, that occur on-site during construction will be handled in a way that does not contaminate storm water. • All chemicals including liquid products, petroleum products, chemicals, and wastes stored on site will be covered, contained and protected from vandalism. • Maintenance and repair of all equipment and vehicles involving oil changes, hydraulic system drain down, de-greasing'operations, fuel tank drain down and removal, and other activities which may result in the accidental release of contaminants, will be conducted under cover during wet weather and on an impervious surface to prevent the release,of contaminants onto the ground. Materials spilled during maintenance operations will be cleaned up immediately and properly disposed of. • Wheel wash water will be settled and discharged on site by infiltration. Wheel wash water will not be discharged to the storm water system. • Application of agricultural chemicals, including fertilizers and pesticides, will be conducted in a manner and at application rates that will not result in loss of chemical to storm water runoff. Manufacturers' recommendations will be followed for application rates and procedures. • PH-modifying sources will be managed to prevent contamination of runoff and storm water collected on site. The most common sources of pH-modifying materials are bulk cement, cement kiln dust (CKD), fly ash, new concrete washing and curing waters, waste streams generated from concrete grinding and sawing, exposed aggregate processes, and concrete pumping and mixer washout waters. 11.3 Spill Response The primary objective in responding to a spill is to quickly contain the material(s) and prevent or minimize their migration into storm water runoff and conveyance systems. If the release has impacted on-site storm water, it is critical to contain the released materials on site and prevent their release into receiving waters. 2595 Orchard St.,Orient 11-2 Storm Water Pollution Prevention Plan for Construction Activities If a spill of pollutants threatens storm water at the site, the spill response procedures outlined below must be implemented in a timely manner to prevent the release of pollutants. • The site superintendent will be notified immediately when a spill, or the threat of a spill, is observed. The superintendent will assess the situation and determine the appropriate response. • If spills represent an imminent threat of escaping the site and entering the receiving waters, facility personnel will respond immediately to contain the release and notify the superintendent after the situation has been stabilized. • Spill kits containing materials and equipment for spill response and cleanup will be maintained at the site. Each spill kit should contain: — Oil absorbent pads (one bale) — 55-gallon drums (2) — 9-mil plastic bags (10) — Personal protective equipment including gloves and goggles • If an oil sheen is observed on surface water (e.g., settling ponds, detention pond, and swales), absorbent pads will be applied to contain and remove the oil. The source of the oil sheen will also be identified and removed or repaired as necessary to prevent further releases. • The site superintendent, or his designee, will be responsible for completing the spill reporting form,and for reporting the spill to the appropriate state or local agency (see Forms at the end of this section). • Facility personnel with primary responsibility for spill response and cleanup will receive training from the site superintendent. This training will include identifying the location of spill kits and other spill response equipment and the use of spill response materials. • Spill response equipment will be inspected and maintained as necessary to replace any materials used in spill response activities. 2595 Orchard St.,Orient 11-3 Storm Water Pollution Prevention Plan for Construction Activities 11.4 Notification In the event of a spill, make the appropriate notification(s) consistent with the following procedures: • Any spill of oil which 1)violates water quality standards, 2)produces a "sheen" on a surface water, or 3)causes a sludge or emulsion must be reported immediately by telephone to the National Response Center Hotline at(800)424-8802. • Any oil, hazardous substance, or hazardous waste release which exceeds the reportable quantity must be reported immediately by telephone to the National Response Center Hotline at(800)424-8802. • Any spill of oil or hazardous substance to waters of the state must be reported immediately by telephone to the New York State Department of Environmental Conservation at(631) 444-0320 or the 24-hour hotline at(800)457-7362. • Any release of a hazardous substance that may be a threat to human health or the environment must be reported to the New York State Department of Environmental Conservation at (631) 444-0320 or the 24-hour hotline at (800) 457-7362 immediately upon discovery. 2595 Orchard St.,Orient 11-4 Storm Water Pollution Prevention Plan for Construction Activities Emergency Phone Numbers Fire,Police,Ambulance 911 Owner:East End Holding Co. (917)502-0101 LLC General Contractor: To Be Determined. 'Subcontractors Sub#1) Sub#2 Sub#3 Sub#4 State Ecology Dept. Water Quality (631)444-0405 Oil/Hazardous Spills (631)444-0320 2595 Orchard St.,Orient Storm Water Pollution Prevention Plan for Construction Activities Spill Report Form LOCATION:. ............ Time: Regulatory agencies notified(date,time,person,agency,and how):_-............. ............ .....w,.,.....w,._ Material spilled: ............... Quantity spilled: ..................... ........_........ Source: _. Cause: Extent of injuries(if any): Adverse environmental impact(if any):. __w wwwww_............ww._..........�.__. wwww Immediate remedial actions taken at time of spill: Measures taken or planned to prevent recurrence: ...... Additional .wwwww_ _ . ... .....w.. This report prepared by: _........... (Signature) 2595 Orchard St.,Orient Storm Water Pollution Prevention Plan for Construction Activities 12 STORM WATER TREATMENT 12.1 Storm Water Collection System During all phases of construction and grading the contractor will provide storm water collection and conveyance systems (if necessary) to collect and direct sediment contaminated water to temporary sediment traps as needed to prevent offsite discharge of sediment laden storm water. Construction will occur in phases as much as practicable to avoid unnecessarily exposing vegetated areas of the site. Clean storm water, generated from stabilized and undisturbed portions of the site, will be collected and conveyed to stabilize discharge areas whenever necessary to avoid contact with disturbed portions of the site. All conveyance and collection systems will be constructed consistent with State and local BMP requirements. 12.2 Temporary Sediment Traps During construction, sediment contaminated storm water will be conveyed to temporary swales or sediment basins to act as sediment traps. Based on the proposed construction, no such temporary practices should be necessary. If such practices are utilized, the accumulated sediment shall be periodically removed and re-distributed on site as fill. Discharge of storm water to surface waters is not proposed. 2595 Orchard St.,Orient v 12-1 Storm Water Pollution Prevention Plan for Construction Activities 13 BMP MAINTENANCE All temporary and permanent erosion and sediment control BMPs will be maintained and repaired as needed to assure continued performance of their intended function. All maintenance and repair_will be conducted in accordance with BMPs. Recommended BMP maintenance requirements are listed in Tables 1 and 2 included in this section. Following Tables 1 and 2 is a BMP Inspection Checklist for use in routine inspections of the construction site. All temporary erosion and sediment control BMPs will be removed within 30 days after final site stabilization is achieved or after the temporary BMPs are no longer needed. Trapped sediment will be removed or stabilized on site. 'Disturbed soil areas resulting from removal of BMPs or vegetation will be permanently stabilized as soon as possible. 2595 Orchard St.,Orient 13-1 f Storm Water Pollution Prevention Plan for Construction Activities Table 1 BMP Maintenance and Inspection Schedule (Source Control BMPs) 2595 Orchard Street Orient,NY BMP BMP Name Recommended Maintenance Recommended Designation Schedule of Maintenance C101 Preserving Inspect flagged areas to make sure flagging Daily Natural has not been removed. If tree roots have been Vegetation exposed or injured,recover and/or seal them. C102 Buffer Zones Inspect the area frequently to make sure Daily flagging remains in place and the area remains undisturbed. C103 Plastic or If the fence has been damaged or visibility Daily Metal Fence reduced,it shall be repaired or replaced immediately and visibility restored. C104 Stake and If the fence has been damaged or visibility Daily Wire Fence reduced,it shall be repaired or replaced immediately and visibility restored. C105 Stabilized Quarry spalls(or hog fuel)shall be added if Daily Construction the pad is no longer in accordance with the Entrance and specifications. If the rock(or hog fuel) Tire Wash entrance is not working to keep streets clean, then install wheel wash,sweep streets,or wash streets if wash water can be collected. C106 Wheel Wash Wheel wash water shall not be discharged into Daily a storm drain or the site's storm water collection system. Use closed-loop recirculation,land application,or discharge to sanitary sewer(by permit). C107 Const.Road Inspect stabilized areas regularly,especially Daily Stabilization after large storm events. Add rock(hog fuel), gravel,etc.as needed to maintain a stable surface which won't erode. C 120 Temporary& Re-seed areas failing to establish 80%cover Inspect to ensure growth Permanent within one month(during growing season). If weekly Seeding re-seeding is ineffective,use sodding or netsiblankets. Eroded areas shall be corrected, re-planted,and irrigated as required. C121 Mulching Maintain specified thickness of mulch cover. Weekly and following Eroded areas must be corrected and re- storms mulched. Drainage problems must be corrected. 2595 Orchard St.,Orient Storm Water Pollution Prevention Plan for Construction Activities BMP BMP Name Recommended Maintenance Recommended Designation Schedule of Maintenance C122 Nets and Inspect to ensure good contact with ground Weekly and following Blankets and no erosion of soils. Replace damaged storms material and re-staple where required. Correct erosion problems immediately. C123 Plastic Replace torn sheets and repair open seams. Weekly Covering Replace deteriorated plastic sheets. Dispose of plastic when no longer needed. C124 Sodding If sod is unhealthy correct problem. If sod Weekly and following can't be established seed area and use net or storms blanket to stabilize soils. C125 Top Soiling Inspect stockpiles regularly,especially after Weekly and following large storm events. Stabilize areas that have storms eroded. C126 Polyacrylami Reapply PAM to actively worked soils at 48- Daily de hr. intervals not to exceed 7 application per Application month. Reapply PAM to undisturbed soils at 2-month intervals. C130 Surface Seed roughened surfaces as soon as possible. Weekly and following Roughening Re-grade and re-seed any areas beginning to storms erode. C131 Gradient Maintenance should be performed as needed. Annually and following Terraces large storm events C140 Dust Control Re-apply dust control measures as necessary to Daily during dry keep dust to a minimum. weather 2595 Orchard St.,Orient Storm Water Pollution Prevention Plan for Construction Activities Table 2 BMP Maintenance and Inspection Schedule (Runoff, Conveyance, and Treatment BMPs) 2595 Orchard Street Orient, NY BMP BMP Name Recommended Maintenance Recommended Designation Schedule of Maintenance C200 Interceptor Inspect to insure structural integrity. Repair Weekly and following Dike&Swale as needed storms C201 Grass-Lined During growth period, inspect grass after Weekly and following Channels rainstorms. Remove accumulated sediments. storms Inspect outlets to prevent scouring and erosion. C202 Riprap Inspect to ensure underlain soils are not Weekly and following Channel eroding. Inspect for slippage on slopes. storms Lining C204 Pipe Slope Check inlets for undercutting and outlets for Weekly and following Drains erosion after rainstorms. Inspect pipe for storms damage. Check pipe for clogging debris. C205 Subsurface Check to ensure drains are not clogged with Monthly Drains sediment or plant roots. Prevent heavy truck traffic from crushing piping. C206 Level Spreader Check to ensure proper functioning after Weekly and following rainstorms. Prevent traffic from crossing the storms spreader. Repair if damaged. C207 Check Dams Remove sediment when one half the sump Weekly and following depth. Check for erosion around edges of storms dams. C209 Outlet Inspect and repair as needed. Add rock as Weekly and following Protection needed. Clean energy dissipator if sediment storms builds up. C220 Storm Drain Replace clogged filter fabric. Clean sediment Weekly and following Inlet from stone filters. Do not wash collected - storms Protection sediments into storm drains—remove to soil stockpile. C230 Straw Bale Inspect daily during rainy periods.Check for Daily during prolonged Barrier undercutting,end runs,and damaged bales. rainy periods. Remove accumulated sediment when one half the barrier height. C231 Brush Barrier Inspect daily during rainy periods.Check for Weekly and following undercutting,end runs,and damaged sections. storms Remove accumulated sediment. 2595 Orchard St.,Orient Storm Water Pollution Prevention Plan for Construction Activities BMP BMP Name Recommended Maintenance Recommended Designation Schedule of Maintenance C232 Silt Fence Repair damaged fencing immediately. Weekly and following Intercept concentrated flows and reroute. storms Remove sediment accumulations at 6-inches. Replace deteriorated fencing material. Properly dispose of used fencing. C233 Vegetated Re-seed damaged areas immediately. Install Weekly and following Strip sod to replace eroded vegetation. Reroute storms concentrated flows through vegetated strip C240 Sediment Trap Remove sediment when it reaches a depth of Weekly and following one foot. Repair damage to trap storms embankments and slopes. C241 Sediment Pond Remove sediment when it reaches a depth of Weekly and following one foot. Repair damage to pond storms embankments and slopes. C250 Storm water See Monitoring in Section 11 As required Chemical Treatment 2595 Orchard St.,Orient Storm Water Pollution Prevention Plan for Construction Activities 14 PROJECT MANAGEMENT Implementation and management of the environmental aspects of this project under the SWPPP are the responsibility of the property owner and the prime contractor for the work. Communication between all parties performing work on the site is essential for proper implementation of the SWPPP. The prime contractor, utility installation contractor, and grading contractor should all be familiar with the SWPPP and their responsibilities under the plan. The following outline has been provided to help delegate responsibilities of the SWPPP: 14.1 Phasing of Construction The land owner shall be responsible for construction of the private right-of-way including the proposed stormwater detention system. This shall be the first phase of construction and is anticipated to be complete within 1 month of commencement. Development of the individual building lots shall be by whomever purchases the building lot. The land owner shall notify the purchaser of their obligation to conform to this SWPPP but will not have the legal authority to compel compliance. The duration of the building lot construction cannot be predicted as there are too many variables including, but not limited to, amount of time necessary to sell the lot, amount of time lot purchaser intends to hold the lot prior to developing it, amount of time necessary to design the proposed construction, the amount of time necessary to secure all necessary permits for construction, and the amount of time required to construct the home and associated site improvements. To the extent possible, all contractors shall limit the amount of land area disturbed at any one time. From the beginning of construction until completion, the storm water pollution protection plan shall be followed. 14.2 Seasonal Work While not seasonal, some construction activities may need to be postponed if scheduled during ongoing storm events. Activities such as grading and trenching could easily result in sediment-contaminated storm water being generated. This work would therefore more appropriately be performed within a window of dry weather predicted on the basis of weather reports. 2595 Orchard St.,Orient 14-1 Storm Water Pollution Prevention Plan for Construction Activities 14.3 Training The prime contractor for each phase of the project will provide on-site training to key personnel responsible for compliance with the SWPPP. The contractor's superintendent and project manager will be familiarized with the major elements of the plan. Construction workers and others at the site will be given appropriate training information at the conclusion of site safety meetings or on an as-needed basis. 14.4 Pre-construction Conference One or more pre-construction meetings will be held with an explicit agenda item addressing the SWPPP. 14.5 Coordination with Utilities and other Contractors All contractors providing services on the project which may cause storm water pollution will be given a copy of the SWPPP and appropriate training regarding storm water pollution prevention. 14.6 Subcontractor Oversight Subcontractor oversight to ensure compliance with the SWPPP will be provided by the prime contractor's superintendent or project manager. Informal, on-the-job tailgate training will be the first level of communication followed by on-site observation of training compliance. Non-compliance with SWPPP policies will trigger a more intensive training session to correct the problem(s). Chronic non-compliance with SWPPP policies may require the intervention of local and/or state regulatory personnel. 14.7 Monitoring/Reporting Reports such as erosion and sediment control inspections will be the responsibility of the prime contractor or a designated consultant. Spill reports will be completed and submitted by the prime contractor on the project. Reporting forms are included at the end of this section. 14.8 SWPPP Update The SWPPP will be updated as requested by the property owner or the prime contractor. 2595 Orchard St.,Orient 14-2 Storm Water Pollution Prevention Plan for Construction Activities Storm water Monitoring Form PROJECT. CONTRACTOR: RECEIVING WATER: MONITOR PERFORMED BY: Monitoring date; �w.w___._........� ._ ...............Time:-._w_wwww­— ...w........_........ Current weather Previous 24-hour weather conditions:-.w ..._wwwwww _ .. _w m _ ..._.................._........ SAMPLING POINT TURBIDITY TU Up-Stream Adjacent Downstream Comments: _._ w _ww................................__....... �wwwwwwwwwwwww_..................__...www ..www.w........_............... ... Sampler's signature print name 2595 Orchard St.,Orient Storm Water Pollution Prevention Plan for Construction Activities Erosion and Sediment Control Inspection Form Erosion Prevention Inspector(s): ............. _ _ Date:..ww.._...............__...M.._. .__. .. Site Name and Location: Current Weather Conditions: Last 24 Hours: B M P Des nation O.K Not O.K. BMP Condition Corrective Action,General Notes Construction Access Trackout? Street Clean? Soil Stabilization Signs of Erosion: ..................... ..................� _w Gullies? Slope Failures? Rills? Slope Protection Plastic Condition? Grass Growing? Hydroseed Condition? Matting? .............. ...... m_.w .._..__ ........ Perimeter Control ....... Clearing Limits Marked? Silt Fences? Swales? Conveyances Stable _wwww...... Ditches? Check Dams Intact? SandBags? .�..�wwww______._...........�.���ww���_.._ ................... Slope Drains? wwwwww...... ..... TESC Management Revisions Required? .................. ._ww._ _ ......w...... Water Management ........ _ _ w ....... Infiltration System? 'lean and Dirty Water Separated Offsite Water Bypassing? Outlet Protection ..................... _- .._..,.—__ www......ww....._ Stabilized? 2595 Orchard St.,Orient Storm Water Pollution Prevention Plan for Construction Activities Erosion and Sediment Control Inspection Form Sediment Control BMP Desi nation O.K Not O.K. BMP Condition,Corrective Action,General Notes Storm water Detention And Monitoring BMP Maintenance _............... _w_w Inlet Protection ....... ............. Dust Control Spill Prevention .................... ondition of Discharg Water Comments: 2595 Orchard St.,Orient Storm Water Pollution Prevention Plan for Construction Activities FIGURES Figures 1 (Existing Site Topographic Map) 2595 Orchard St.,Orient LU LL cq q �y 11 VY \ 5r _j 0 N(A •..,„ .,mod" � Yt 09 c� ell 0 I70 Storm Water Pollution Prevention Plan for Construction Activities Figures 2 (Storm water BMP Site Map/Stormwater Management For Building Lot#1) 2595 Orchard St.,Orient 0 1, w� SILT FENCE INLET PROTECTI 41) UILDIN ON / 9F SILT FENCE 1 '` / \BARNS` A R SERVE REA f t x It I / � t m / w / a r r k ` � g It LOT 1 / 406,701.93 S.F. DROSS p / + I 58,8' 6.51 S.F. BUILISING LOT r / 347,805.42 S.F', tOPEN SPACE I CL. BARN RESERVI f Q (TITLE ESERVED TO APPLICANT) It 4 , ✓ / �t 20,791{65 S.F. BARN ;RESERVE P i CONSTRUCTION , � ENTRANCE #1 t _ 1 �. Storm Water Pollution Prevention Plan for Construction Activities a Figure 3 (Storm water BMP Site Map/Stormwater Management For Building Lots #2, #3, #4 and #5) 2595 Orchard St.,Orient LU LL: - /l r \ \ C cv OP _j 2 / ) J rv° ULn C 0) ✓'r r""r' s ,'"' 0) „1 r m " � e. a^ �+ a ! W O Ix " LL 0 w ✓' C, � n Storm Water Pollution Prevention Plan for Construction Activities APPENDIX A STANDARDS AND SPECIFICATIONS FOR SELECTED BMPs 2595 Orchard St.,Orient STANDARD AND SPECIFICATIONS FOR PROTECTING VEGETATION DURING CONSTRUCTION recommendations made for the vegetation to be saved. Minor adjustments in location of roads, dwellings,and utilities may be needed. Construction on steep slopes,erodible soils, wetlands,and streams should be avoided. Clearing limits should be delineated(See �� DeCermine Limits of Clearing and Grading"on page 2.2). 2) Areas to be seeded and planted should be identified. Remaining vegetation should blend with their surroundings and/or provide special function such as a filter strip,buffer zone,or screen. 3) Trees and shrubs of special seasonal interest, such as flowering dogwood,red maple,striped maple,serviceberry,or shadbush,and valuable Deffilition & scope potential shade trees should be identified and marked for special protective treatment as The protection of trees,shrubs,ground cover and other appropriate. vegetation from damage by construction equipment. In 4) Trees to be cut should be marked on the plans. order to preserve existing vegetation determined to be If timber can be removed for salable products,a important for soil erosion control,water quality forester should be consulted for marketing advice. protection,shade,screening,buffers,wildlife habitat, wetland protection,and other values. 5) Trees that may become a hazard to people, personal property,or utilities should be removed. These include trees that are weak-wooded, Conditions Where Practices l 11Ntga disease-prone,subject to windthrow,or those that have severely damaged root systems. On planned construction sites where valued vegetation exists and needs to be preserved. 6) The vigor of remaining trees may be improved by a selective thinning. A forester should be De i n Criteria consulted for implementing this practice. 1. Planning Considerations 2. Measures to Protect Vegetation A. Limit soil placement over existing tree and shrub A. Inventory: roots to a maximum of 3 inches. Soils with loamy texture and good structure should be used. 1) Property boundaries,topography,vegetation and soils information should be gathered. Identify B. Use retaining walls and terraces to protect roots of potentially high erosion areas,areas with tree trees and shrubs when grades are lowered. Lowered windthrow potential,etc. A vegetative cover type grades should start no closer than the dripline of the map should be made on a copy of a topographic tree. For narrow-canopied trees and shrubs,the stem map which shows other natural and manInade diameter in inches is converted to feet and doubled, features. Vegetation that is desirable to preserve such that a 10 inch tree should be protected to 20 feet. because of its value for screening„shade,critical erosion control,endangered species,aesthetics,etc., C. Trenching across tree root systems should be the should be identified and marked on the map. same minimum distance from the trunk, as in`B". Tunnels under root systems for underground utilities 2) Based upon this data,general statements should should start 18 inches or deeper below the normal be prepared about the present condition,potential ground surface. Tree roots which must be severed problem areas,and unique features of the property. should be cut clean. Backfill material that will be in contact with the roots should be topsoil or a prepared B. Planning: planting soil mixture. 1) After engineering plans(plot maps)are prepared, D. Construct sturdy fences,or barriers,of wood, another field review should take place and steel,or other protective material around valuable November 2016 Page 2.26 New York State Standards and Specifications For Erosion and Sediment Control vegetation for protection frorn construction equipment. Place barriers far enough away from trees,but not less than the specifications in "B",so that tall equipment such as backhoes and dump trucks do not contact tree branches. E. Construction limits should be identified and clearly marked to exclude equipment. F. Avoid spills of oil/gas and other contaminants. G. Obstructive and broken branches should be pruned properly. nic branch collar on all branches whether living or dead should not be damaged, 'The 3 or 4 cut method should be used on all branches larger than two inches at the cut. First cut about one-third the way through the underside of the limb(about 6-12 inches from the tree trunk). Then(approximately an inch further out)make a second cut through the limb from the upper side. When the branch is removed,there is no splintering of the main tree trunk, Remove the stub. If the branch is larger than 5-6 inches in diameter,use the four cut system. Cuts I and 2 remain the same and cut 3 should be from the underside of the limb,on the outside of the branch collar. Cut 4 should be from the top and in alignment with the 3rd cut. Cut 3 should be 1/4 to 1/3 the way through the limb. This will prevent the bark from peeling down the trunk. Do not paint the cut surface. H. Penalties for damage to valuable trees,shrubs,and herbaceous plants should be clearly spelled out in the contract. PROTECTING TREES IN HEAVY USE AREAS The compaction of soil over the roots of trees and shrubs by the trampling of recreationists,vehicular traffic,etc.,reduces oxygen,water,and nutrient uptake by feeder roots. This weakens and may eventually kill the plants. Table 2.6 rates the"Susceptibility of Tree Species to Compaction." Where heavy compaction is anticipated,apply and maintain a 3 to 4 inch layer of undecayed wood chips or 2 inches of No.2 washed,crushed gravel. In addition,use of a wooden or plastic mat may be used to lessen compaction,if applicable. New York State Standards and Specifications Page 2.27 November 2016 For Erosion and Sediment Control Table 2.6 Susceptibility of Tree Species to Compaction' Resistant: Box elder............... Acer negundo Willows..............,...... Salix spp. Green ash............... Fraxinuspennsylvanica Honey locust............... Gleditsia triacanthos Red elm.................. Ulmus rubra Eastern cottonwood, Populus deltoides Hawthornes............... Cralaegus spp. Swamp white oak...,...... Quercus bicolor Bur oak.................... Quercus macrocarpa Hophornbearn....... ......Ostrya virginiana Northern white cedar,... Thuja occidenialis Intermediate: Red maple.., Acer rubrum Sweetgum............. Liquidambar styraciflua Silver maple.,. Acer saccharinum Norway maple.........„„.. Acer platanoides Hackberry......... Cellis occidentalis Shagbark hickory.......„.. Carya ovata Black gum..„......,...,. Nyssa sylvatica London plane.............. Platanus x hybrida Red oak.................. Quercus rubra Pin oak...................... Quercus palustris Basswood...,,„..„......„ Tilia americana Susceptible: Sugar maple.„,„............ Acer saccharum Austrian Pine............... Pinus nigra White pine..,...„.......,,.. Pinus strobus White ash............. Fraxinus americana Blue spruce...,.....„...,... Piceapungens Paper birch............„.... Betula papyrifera White oak..........,„.,.... Quercus alba Moutain ash..........„.,... Sorbus aucuparia Red pine...........,„...,... Pinus resinosa Japanese maple............ Acer palmatum If a tree species does not appear on the list,insufficient information is available to rate it for this purpose. November 2016 Page 2.28 New York State Standards and Specifications For Erosion and Sediment Control STANDARD AND SPECIFICATIONS FOR STABILIZED CONSTRUCTION ACCESS inert to commonly encountered chemicals,hydro-carbons, mildew,rot resistant,and conform to the fabric properties as shown: Light Duty' z Fabric Proper- Roads Heavy Duty Test Meth- Grade Sub- Haul Roads od hes3 grade Rough Graded Grab Tensile 200 220 ASTM ,r �Pwr Strength(lbs) D1682 Elongation at 50 60 ASTM i Failure(%) D1682 Mullen Burst 190 430 ASTM Strength(lbs) D3786 Definition & Scope Puncture 40 125 ASTM D751 Strength(lbs) Modified A stabilized pad of aggregate underlain with geotextile located Equivalent 40-80 40-80 US Std at any point where traffic will be entering or leaving a Sieve construction site to or from a public right-of-way,street,alley, sidewalk,or parking area. The purpose of stabilized Opening Size CW-02215 construction access is to reduce or eliminate the tracking of sediment onto public rights-of-way or streets. Aggregate 6 10 Depth Conditions Where Practice Armlies 'Light Duty Road: Area sites that have been graded to subgrade and where most travel would be single axle vehicles and an occasional multi- A stabilized construction access shall be used at all points of axle truck. Acceptable materials are Trevira Spunbond 1115,Mirafi construction ingress and egress. 100X,Typar 3401,or equivalent. 2Heavy Duty Road: Area sites with only rough grading,and where most Design Criteria travel would be multi-axle vehicles Acceptable materials are Trevira Spunbond 1135,Mirafi 600X,or equivalent, See Figure 2.1 on page 2.31 for details. 'Fabrics not meeting these specifications may be used only when design Aggregate Size: Use a matrix of 1-4 inch stone,or procedure and supporting documentation are supplied to determine ag- reclaimed or recycled concrete equivalent. gregate depth and fabric strength Thickness: Not less than six(6)inches. Maintenance Width: 12-foot minimum but not less than the full width of The access shall be maintained in a condition which will points where ingress or egress occurs. 24-foot minimum if prevent tracking of sediment onto public rights-of-way or there is only one access to the site. streets. This may require periodic top dressing with additional aggregate. All sediment spilled,dropped,or Length: As required,but not less than 50 feet(except on a washed onto public rights-of-way must be removed single residence lot where a 30 foot minimum would apply). immediately. Geotextile: To be placed over the entire area to be covered When necessary,wheels must be cleaned to remove with aggregate. Filter cloth will not be required on a single- sediment prior to entrance onto public rights-of-way. When family residence lot. Piping of surface water under entrance washing is required,it shall be done on an area stabilized shall be provided as required. If piping is impossible,a with aggregate,which drains into an approved sediment- mountable berm with 5:1 slopes will be permitted. trapping device. All sediment shall be prevented from entering storm drains,ditches,or watercourses. Criteria for Geotextile: The geotextile shall be woven or nonwoven fabric consisting only of continuous chain polymeric filaments or yarns of polyester. The fabric shall be November 2016 Page 2.30 New York State Standards and Specifications _ w For Erosion and Sediment Control Figure 2.1 Stabilized Construction Access LEISTINC, YIBDL VEMENIT I EXISTING FILTER Z MOMTABLE E RM GROUND CLCITH (OPTIONAL) INI MIN. EXISTINGGROUND T III[IN� Nlli EMIS II`#G PAVEMENT 10 hNIN, CONSTRUCTION SPECIFICATIONS 1. STONE SIZE USE 1-4 INCH STONE, OR RECLAIMED OIR RECYCLED CONCRETE EOU[VALENT„ Z. LENGTH NOT LESS THAN 5D FEET (EXCEPT ON A SINGLE RESIDENCE LOT WHERE A 31 FOOT HINIMUM LENGTH WOULD APPLY), 3. THICKNESS - NOT LESS THAN SIX (6) INCHES. 4. WIDTH - 'TWELVE Cl2> FOOT MINIMUM, BUT NOT LESS THAN THE FULL WIDTH AT POINTS WHERE INGRESS OR EGRESS OCCURS. TWENTY-FOUR (24) FOOT IF 'SINGLE ENTRANCE TO SITE. 5. iCEOTESTILE - WILL :BE PLACED OVER THE ENTIRE AREA PRIOR TO 'PLACING OF STONE. 6. SURFACE VATER - ALL :SURFACE WATER FLEIW'ING OR DIVERTED TaWARD CON- STRUCTION ACCESS SHALL BE PIPETS BENEATH THE ENTRANCE, IF !PIPING IS IMPRACTICAL, A M13UNTABLE BERM WITH 5•:1 SLOPES WILL BE PERMITTED. 7. MAINTENANCE - THE ENTRANCE SHALL DE MAINTAINED IN A CONDITION WHICH WILL PREVENT TRACKING OR FLOWING OF SEDIMENT ON70 PUBLIC RIGHTS-OF-WAY, ALL SEDIMENT SP'ILLED, DROPPED,, WASHED OR TRACKED, ONTO PUBLIC RIGHTS-Or-WAY MUST BE REMOVED IMMEDIATELY. R. WHEN WASHING IS REFIRED, IT SHALL DE DONE ON A AREA STABILIZED WITH STONE AND WHICH MAINS INTO AN APPROVED SEDIMENT TRAPPING DEV[CE, 9. PERIODIC INSPECTION AHD NEEDED MAINTEMANCE SHALL BE PROVIDED AFTER EACH RAIN. ADAPTED f;R13 N DE7A1LS PR15VIDED Y- USDA - HRC:S, STABILIZED NEV "Y(JRK STATE DCPA R'TN CNT OF TRANSPORTATION, N, CONSTRUCTION NEWYNZ RK STATE DEPARTMENT OF ERNE M NTAL CONSERVATION, NEW Y RK STATE SOIL & WATER CONSERVA710H Id MUTTEE ACCESS New York State Standards and Specifications Page 2.31 November 2016 For Erosion and Sediment Control a� &L kn3I / � J zE E . . § § F § § } 5 § Eo / o 4 2 \ j uuPo Q \ V) < \ \ \ LO C) \ \ ` § S 6 5 . zL b � \ . S $ \ ! � R C) � / E § E E0 \ e § I § h \ � \ 0 ® \ r < } FLLJ zz \ :) J 2 � $ a < \ F to > w / < E > z / g « 3 o = z m of e § § \/ § ± 2 § E � o (nJ ® � LLJ % L § u. . / . jEd § ± X § ® F \ $ Ec � § m o = « u \ E2 ƒ co 0 0 CL T ;L wkj § » ƒ Ld E / EII qa / 0 z = w TIRE WASH C]OB STANDARD AND SPECIFICATIONS FOR LOOSE STABILIZATION BLANKETS Placement:The method of application and depth of compost depend upon site conditions. Vegetation of the compost " blanket is generally archived by incorporating seed into the compost before it is applied. However,seeding may occur after the application if needed. o, The compost application rate will be in accordance with the following table. Compost is not recommended for slopes steeper than 2H:1 V. Slopes with problem soils and more runoff will require greater application rates. Compost Application Rates Slope Length(ft) <3H:1 V Slopes 3H:1 V to 2H:1 V Definition and Scope Slopes 270 cy/acre 540 cy/acre 20 or less Blankets of various materials placed pneumatically, (2"Layer) (4"Layer) Y ) hydraulically,or other means on a prepared planting area or 405 cy/acre 675 cy/acre a critical area where existing vegetation can remain to 20 to 60 (3"Layer) (5"Layer) reduce rain splash and sheet erosion and promote vegetative stabilization. 60 to 100 540 cy/acre 810 cy/acre (4"Layer) (6"Layer)* Conditions Where Practice acttce Aimlies *For slopes between 2H:1V and 1H:1V use this rate with a Loose blankets are an appropriate stabilization practice for I max.slope length of 40 ft. any soil surface that is rocky,frozen,flat,or steep. They Construction S , .f ation can be used on streambanks,road cuts and embankments, and construction site areas where stormwater runoff occurs 1. Compost shall be placed evenly and must provide as sheet flow. They should not be used in areas of 100%soil coverage(no soil visible). On highly concentrated flow. unstable soils,use compost in conjunction with appropriate structural measures. Design Criteria 2. Spread the compost uniformly to the design thickness .Compost.Blanket by hand or mechanically(e.g.with a manure spreader, front end loader,dozer,pneumatic blower,etc.)and Material:The compost infill shall be well decomposed then track(compact)the compost layer using a (matured at least 3 months),weed-free,organic matter. It bulldozer or other appropriate equipment. shall be aerobically composted,possess no objectionable odors,and contain less than 1%,by dry weight,of man- 3. When using a pneumatic(blower)unit,shoot the made foreign matter. The physical parameters of the compost directly at soil,to provide a tighter interface compost shall meet the standards listed in Table 5.2- between the soil and compost and prevent water from Compost Standards Table. Note:All biosolids composts moving between the two layers. produced in New York State(or approved for importation)must meet NYS DEC's 6 NYCRR Part 360 4. Apply compost layer approximately 3 feet beyond the (Soild Waste Management Facilities)requirements. The top of the slope or overlap it into existing vegetation. Part 360 requirements are equal to or more stringent 5. Follow by seeding or ornamental planting as specified. than 40 CFR Part 503 which ensure safe standards for pathogen reduction and heavy metal content. When 6. When planting immediate grass,wildflower,or legume using compost blankets adjacent to surface waters,the seeding or ornamental planting,use only a well compost should have a low nutrient value. composted product that contains no substances toxic to plants. New York State Standards and Specifications Page 4.37 November 2016 For Erosion and Sediment Control 7. Very coarse composts should be avoided if the slope is should be in accordance with manufacturers to be landscaped or seeded,as it will make planting and recommendations. crop establishment more difficult. Composts containing fibrous particles that range in size produce a C o n tr cti n S aeeific tions more stable mat. BFMs,FGMs and PSFMs are typically applied in two ljjdraulically A alied Blankets stages. Unless specifically recommended to be applied in one application by the manufacturer,the seed mixture and These blankets are formed by mixing different types of soil amendments should be applied first. If the seed is materials with water and are then applied using standard applied at the same time as the hydraulically applied hydroseeding equipment. These blankets should not be blankets,the bonded fibers may keep the seed from making used in areas of concentrated flow such as ditches and sufficient contact with the soil to germinate. After the seed channels. mixture is applied,the hydraulically applied blankets should be sprayed over the area at the required application rate, A. 13 ancc cd l,�,i'>e�LMa ri [LrM, -This method makes use according to the manufactures recommendations. of a cross-linked hydrocolloid tackifier to bond thermally processed wood fibers. Application rates vary according to site conditions. For slopes up to 3H:1 V the BFM should be applied at a rate of 3,000 lb/ acre. Steeper slopes may need as much as 4,000 lb/ , acre in accordance with the manufacturer's recommendations. BFMs should only be used when no rain is forecast for r at least 48 hours following the application. This is to allow the tackifier sufficient time to cure properly. Once properly applied,a BFM is very effective in preventing accelerated erosion. Bonded Fiber Matrix should not be applied between September 30 and April 1 to allow for proper curing of the polymer. B. l°lexi le Qrow h Meg i�rt� ' - This method has the added component of 1/2 inch long,crimped manmade fibers which add a mechanical bond to the chemical bond provided by BFMs. This increases the blanket's resistance to both raindrop impact and erosion due to runoff. Unlike BFMs,a flexible growth medium typically does not require a curing time to be effective. Properly applied,an FGM is also very effective. There is no need to smooth the slope prior to application. In fact some roughening of the surface (either natural or mechanically induced)is preferable. However,large rocks(>_9 inches)and existing rills should be removed prior to application. Mixing and application rates should follow manufacturer's recommendations. C. Polvmer St bilil �1 " r Mata,,,,,i �� -PSFMs make use of a linear soil stabilization tackifier that works directly on soil to maintain soil structure, maintain pore space capacity and flocculate dislodged sediment that will significantly reduce runoff turbidity„ PSFMs can be used in re-vegetation applications and for site winterization and/or dormant seeding-fall planting for spring germination-applications. Application rates vary according to site conditions and November 2016 Page 4.38 New York State Standards and Specifications For Erosion and Sediment Control STANDARD AND SPECIFICATIONS FOR STORM DRAIN INLET PROTECTION drainage area tributary to the inlet. IThe crest elevations of these practices shall provide storage and minimize bypass flow. Type I—Excavated Drop Inlet Protection This practice is generally used during initial overlot grading after the storm drain trunk line is installed. Limit the drainage area to the inlet device to 1 acre. Exca- vated side slopes shall be no steeper than 2:1. The mini- mum depth shall be I foot and the maximum depth 2 feet as measured from the crest of the inlet structure. Shape the excavated basin to fit conditions with the longest dimension oriented toward the longest inflow area to provide maxi- Definition & Scow mum trap efficiency. The capacity of the excavated basin should be established to contain 900 cubic feet per acre of A temporary barrier with low permeability,installed around disturbed area. Weep holes,protected by fabric and stone, inlets in the form of a fence,berm or excavation around an should be provided for draining the temporary pool. opening,detaining water and thereby reducing the sediment content of sediment laden water by settling thus preventing Inspect and clean the excavated basin after every storm. heavily sediment laden water from entering a storm drain Sediment should be removed when 50 percent of the stor- system. age volume is achieved This material should be incorpo- rated into the site in a stabilized manner. Conditions Where ractice Applie Type II—Fabric Drop Inlet Protection This practice shall be used where the drainage area to an inlet is disturbed,it is not possible to temporarily divert the flQ r //l storm drain outfall into a trapping device,and watertight blocking o di lets sr of anvi abl test This is t t )e tv in 19' practice shall be used with an upstream buffer strip if placed at a storm drain inlet on a paved surface.It may be used in conjunction �1 ss with storm drain diversion to help prevent siltation of pipes installed with low slope angle. Types of Storm Drain Inlet Practices There are five(5)specific types of storm drain inlet protec- tion practices that vary according to their function,location, drainage area,and availability of materials: I. Excavated Drop Inlet Protection This practice is generally used during final elevation grad- II. Fabric Drop Inlet Protection ing phases after the storm drain system is completed. III. Stone&Block Drop Inlet Protection IV. Paved Surface Inlet Protection Limit the drainage area to 1 acre per inlet device. Land area V. Manufactured Insert Inlet Protection slope immediately surrounding this device should not ex- ceed 1 percent. The maximum height of the fabric above Design Criteria the inlet crest shall not exceed 1.5 feet unless reinforced. Drainage Area—The drainage area for storm drain inlets The top of the barrier should be maintained to allow over- shall not exceed one acre. Erosion control/temporary stabi- flow to drop into the drop inlet and not bypass the inlet to lization measures must be implemented on the disturbed New York State Standards and Specifications Page 5.57 November 2016 -- For Erosion and Sediment Control unprotected lower areas. Support stakes for fabric shall be materials and any unstable soil and dispose of properly. a minimum of 3 feet long,spaced a maximum 3 feet apart. They should be driven close to the inlet so any overflow Bring the disturbed area to proper grade,smooth,compact drops into the inlet and not on the unprotected soil. Im- and stabilize in a manner appropriate to the site. proved performance and sediment storage volume can be Type IV—Paved Surface Inlet Protection obtained by excavating the area. Inspect the fabric barrier after each rain event and make repairs as needed. Remove sediment from the pool area as necessary with care not to undercut or damage the filter fabric. Upon stabilization of the drainage area,remove all materials and unstable sediment and dispose of properly. Bring the adjacent area of the drop inlet to grade,smooth and compact and stabilize in the appropriate manner to the site. j Type III—Stone and Block Drop Inlet Protection o WIP n This practice is generally used during the initial and inter- mediate overlot grading j g g of a construction site. Limit the drainage area to 1 acre at the drop inlet. The stone barrier should have a minimum height of 1 foot and a U maximum height of 2 feet. Do not use mortar. The height should be limited to prevent excess ponding and bypass � flow. This practice is generally used after pavement construction has been done while final grading and soil stabilization is Recess the first course of blocks at least 2 inches below the occurring.These practices should be used with upstream crest opening of the storm drain for lateral support. Subse- buffer strips in linear construction applications,and with quent courses can be supported laterally if needed by plac- temporary surface stabilization for overlot areas,to reduce ing a 2x4 inch wood stud through the block openings per- the sediment load at the practice.This practice includes pendicular to the course. The bottom row should have a sand bags,compost filter socks,geo-tubes filled with bal- few blocks oriented so flow can drain through the block to last,and manufactured surface barriers. Pea gravel can also dewater the basin area. be used in conjunction with these practices to improve per- formance. When the inlet is not at a low point,and is off- The stone should be placed just below the top of the blocks set from the pavement or gutter line,protection should be on slopes of 2:1 or flatter. Place hardware cloth of wire selected and installed so that flows are not diverted around mesh with inch openings over all block openings to hold the inlet. stone in place. As an optional design,the concrete blocks may be omitted and the entire structure constructed of stone,ringing the outlet("doughnut"). The stone should be kept at a 3:1 slope toward the inlet to keep it from being washed into the inlet. , A level area 1 foot wide and four inches below the crest will further prevent wash. Stone on the slope toward the inlet should be at least 3 inches in size for stability and I inch or smaller away from the inlet to control flow rate. The eleva- tion of the top of the stone crest must be maintained 6 inch- es lower than the ground elevation down slope from the inlet to ensure that all storm flows pass over the stone into the storm drain and not past the structure. Temporary dik- ing should be used as necessary to prevent bypass flow. " The barrier should be inspected after each rain event and repairs made where needed. Remove sediment as necessary to provide for accurate storage volume for subsequent rains. Upon stabilization of contributing drainage area,remove all November 2016 Page 5.58 New York State Standards and Specifica- tions For Erosion and Sediment Control The drainage area should be limited to 1 acre at the drain inlet. All practices will be placed at the inlet perimeter or beyond to maximize the flow capacity of the inlet.Practices shall be weighted,braced,tied,or otherwise anchored to prevent movement or shifting of location on paved surfaces. Traffic safety shall be integrated with the use of this prac- tice.All practices should be marked with traffic safety cones as appropriate.Structure height shall not cause flood- ing or by-pass flow that would cause additional erosion. The structure should be inspected after every storm event. Any sediment should be removed and disposed of on the site. Any broken or damaged components should be re- placed. Check all materials for proper anchorage and se- cure as necessary. Type V-Manufactured Insert Inlet Protection The drainage area shall be limited to 1 acre at the drain in- let.All inserts will be installed and anchored in accordance with the manufacturers recommendations and design de- tails.The fabric portion of the structure will equal or exceed the performance standard for the silt fence fabric.The in- serts will be installed to preserve a minimum of 50 percent of the open,unobstructed design flow area of the storm drain inlet opening to maintain capacity for storm events. New York State Standards and Specifications Page 5.59 November 2016 For Erosion and Sediment Control Figure 5.31 Excavated Drop Inlet Protection FLOW SYMBOL N it ,0� � .+d �,„ V FLOW F� 00rAVATEM AREA (AS REQUIRED) EXCAVATED DEPTH NL ' T GRAVEL SUPPORTED BY O DE bq I ,'SEEP HOLES FIA►RDWARE CLOTH TO TOP OF INLET. DEVATEERIt ALLOW DRAINAGE AND RESTRICT SEDIMENT MOVEMENT, QQNST UC11 N SPECIFICATI I. CLZM THE AREA OF ALL DEBRIS THAT WILL HINDER EXCAVATIOK 2. GRADE APPROACH TO THE LNL.ET UNIFORMLY ARDLM THE TXA IR B. VEEP HOLES SHALL BE PROTECTED BY GRAVEL. 4. 'UPON STASTUZATION OF CONTRIBUTING DRAINAGE AREA, SM VEEP HOLES, FILL EXCAVATION '"IT STABLE SM TO FIB. GRADE, COMPACT IT PROPERLY AND STABILIZE 'lr►M PERMANENT SEEDING, MAXIKM DRAIMM ,AREA I ACRE r'►WTED FROM DETATLS PROVIDED BY# USDA S� EXCAVATED DROP NEW Y K STATE AR NT OFT ATM, V TORK STATE DEPMT14ENT ®F ENYWOWNTAL GMSERVATM INLET PROTECTION W'W YORK STATE SOn. A 'WATER C ItVATION COMNtTTEE November 2016 Page 5.60 New York State Standards and Specifica- tions For Erosion and Sediment Control Figure 5.32 Fabric Drop Inlet Protection SYMBOL 1.5' RAX. FABRIC' .. 31 Nut DROP MET BURIED FABRIC (12" WITH GATE HELUW GRADE) FRAME M I 12• DRIVE STAKES I A MIN. OF 18' GATHER (EXCESS BELOW GRAN AT CORNERS ......-- CONSTRUCTION SPECIFICATIONS 1. FABRIC SHALL HAVE AN EUS OF 0-85. BURLAP MAY BE USED FDR SHORT TERM APPLICATIGNS. 22 CUT FABRIC FROM A CCNTINUEW L TO ELIMINATE .DINTS. 1F ,JOINTS ARE NEEDED THEY WILL BE CRLAPPE� TO THE h1E�tT STAY,E� I STAR MATpR�AR� �ISM � �T �EE.�. �+ �I]OD Old E�MUx.'�+'+A1.�T. METAE VITH NIM L TH 4. SPACE STAKES EVENLY AROUND INLET 3 FEET APART AND IlRIVE A WITH THE CEO S I PM SH E I1T NTCI A RICMAY I7 ESURI LLED, �TH BE ALBEESEIEL I FOOT F14TEMEET©THICST�K ANDAA#D FRANF— 6. A 21 x 41 W013D FRAME SHALL BE C1]NPLETED AR13UND THE CREST 13F THE FABRIC FOR OVER FL[1W STABILITY. NAXWN DRAINAGE AREA 1 ACRC AiWTED PRDM W-TAn-S MdVIDED Mwo USDA, — NRCS, FABRIC NEW YDI'i1C STATE DEPARTMENT OF TRANSPORTATI10K NEW YOM STATE DEPARTMENT [IF ENVIRUNWNTAL CONSEFrVATIUK DROP INLET NEW YORK STATE 5131L & WATER C MSERVATIUN l TTEE PROTECTION New York State Standards and Specifications Page 5.61 November 2016 For Erosion and Sediment Control Figure 5.33 Stone & Block Drop Inlet Protection • - ,'-� RITE BLOCK SYMBOL DEVATERIN 24 SU[IPE --"*-- GRAVEL FILTER RE SEDIMENT -� S K DEWATERING 2.%4 C. DROP M I LET LW VLTH GATE SEDIMENT TEMP _4C:::�SEDIMENT PSOL. 1141K SLOPE3i SLOPEWIRE ESN 29NAX FINE GRAVEL FACE %A WHIK THICKNESS) 3' ST CONSTRUCTION SPECIFICATION I. LAY ONE BLOCK ON EACH SIDE OF THE STRXTURE ON ITS SIDE FOR DEWATERIM+M x FOMUNDATION SHALL BE 2 INCHES NINI"UM -BELOW RESIT OF INLET AND BLOCKS SH&L BE PLACED AGAINST INLET FOR SUPPORT, P, 14A'RDVARE CLOTH OR 1/2' WIRE MESH SHALL BE P1-A= OVER BLOCK OPENINGS TO SUPPORT STONE. I USE CLEAN ST OEM GRAVEL I -3/4 INCH IN DIAMETER PLACED 2 INCHES RELOW TON' OF THE KOCK ON A bL SLOPE 13R FLA U 4. FOR STOW STRUCTURES Y* A L !FOOT THICK LAYER OF THE FILTER STOW WILL. X PLACED AGAINST THE 3 INCH STOW AS SIIOVN ON THE DRAVWGS, MAXIMUM 11RAD4AGE AREA 1 ACK A TE rRM KTAILS PRDVIDED TRANSPORTATION,, USA TONE & BLOC �NEW T STATE T OF NEW YM STATE DEPARTWX OF UMP001ENTAL COMERVATIONO DROP INLET NEW YM STATE SOa. s v.ATEIR CONURVATMN COMNITTEE PROTECTION November 2016 Page 5.62 New York State Standards and Specifica- tions For Erosion and Sediment Control STANDARD AND SPECIFICATIONS FOR SILT FENCE roll down. The area beyond the fence must be undis- turbed or stabilized. 3. The type of silt fence specified for each location on the t A plan shall not exceed the maximum slope length and maximum fence length requirements shown in the fol- lowing table: t Slope Length/Fence Length(ft.) Slope Steepness Standard Reinforced Super l� <2% <50:1 300/1500 N/A N/A w _ .w...._--- 2-10% 50:1 to 10:1 125/1000 250/2000 300/2500 w Definition & Scope 10-20% 1 0:1 to 5:1 100/750 I50/1000 200/1000 20-33% 5:1 to 3:1 601500 80/750 100/1000 A temporary barrier of geotextile fabric installed on the ---.... - -- ....... ---- contours across a slope used to intercept sediment laden 33-50% 3 rt1 to 2:1 40/250 70/350 1001500 runoff from small drainage areas of disturbed soil by tem- >50%vMv >2.1 20/125 30/175 _ 50/250 porarily ponding the sediment laden runoff allowing settling ----. --------------- —to occur.The maximum period of use is limited by the ul- Standard Silt Fence(SF)is fabric rolls stapled to wood- traviolet stability of the fabric(approximately one year). en stakes driven 16 inches in the ground. Reinforced Silt Fence(RSF)is fabric placed against Conditions Where Practice A 3 lies welded wire fabric with anchored steel posts driven 16 inches in the ground. A silt fence may be used subject to the following condi- Super Silt Fence(SSF)is fabric placed against chain tions: link fence as support backing with posts driven 3 feet in the ground. Y 1. Maximum allowable slope length and fence length will not exceed the limits shown in the Design Criteria for 4. Silt fence shall be removed as soon as the disturbed the specific type of silt fence used;and area has achieved final stabilization. 2. Maximum ponding depth of 1.5 feet behind the fence; The silt fence shall be installed in accordance with the ap- and propriate details.Where ends of filter cloth come together, they shall be overlapped,folded and stapled to prevent sedi- 3. Erosion would occur in the form of sheet erosion;and ment bypass.Butt joints are not acceptable.A detail of the silt fence shall be shown on the plan.See Figure 5.30 on 4. There is no concentration of water flowing to the barri- page 5.56 for Reinforced Silt Fence as an example of details er;and to be provided. 5. Soil conditions allow for proper keying of fabric,or other anchorage,to prevent blowouts. Criteria for Silt Fence Materials Design Criteria 1. Silt Fence Fabric: The fabric shall meet the following 1. Design computations are not required for installations specifications unless otherwise approved by the of 1 month or less.Longer installation periods should appropriate erosion and sediment control plan approval be designed for expected runoff. authority. Such approval shall not constitute statewide acceptance. 2. All silt fences shall be placed as close to the disturbed area as possible,but at least 10 feet from the toe of a slope steeper than 3H:IV,to allow for maintenance and November 2016 Page 5.54 New York State Standards and Specifica- tions For Erosion and Sediment Control ...........---......... Super Silt Fence Minimum t+ brruc Properties Acceptable Test t Method Value ..__..._m._ __.._..........., ................ _.._.....__.._ Grab Tensile Strength(lbs) 110 ASTM D 4632 Elongation at Failure(%) _ 20 ASTM D 4632 (.........,..-_.._.._.. ..Str gt 0 0 .... ...... ..__ ......... ..._. ... PSI)n Burst Stren h .300 ASTM D 3786 Puncture Stren h(lbs) /gt 60 ASTM D 4833 J� Minimum Trapezoidal 50 ASTM D 4533 °t` � ,,,� ,,✓ Tear Strength(lbs) __............. Flow Through Rate(gal/ 25 ASTM D 4491 y E i _ "a nt O..e— m ........ _ _... q Opening _................... ...0�___. .._._. ASTM D 4751 s ...................... ......� nm Size 40-80 t.. Sieve Minimum UV Residual 70 ASTM D 4355 (%) U r r 2. Fence Posts(for fabricated units): The length shall be a minimum of 36 inches long. Wood posts will be of sound quality hardwood with a minimum cross section- al area of 3.5 square inches. Steel posts will be stand- ard T and U section weighing not less than 1.00 pound per linear foot.Posts for super silt fence shall be stand- ard chain link fence posts. 3. Wire Fence for reinforced silt fence: Wire fencing shall be a minimum 14 gage with a maximum 6 in. mesh opening,or as approved. 4. Prefabricated silt fence is acceptable as long as all ma- terial specifications are met. einf<ar(ed:.ill � q, y 9 -, > New York State Standards and Specifications Page 5.55 November 2016 For Erosion and Sediment Control WOVEN WIRE FENCE SYMBOL (MIN, 14 GAUGE W/ MAX, 6' MESH 10' MAX, C. T❑ C. SPACING) 36' MIN. LENGTH FENCE POSTS DRIVEN MIN. 16' INT❑ GROUND. .. . HEIGHT OF FILTER 16" MIN, 6' MIN. v, 141 P R PE T V V W 36' MIN, FENCE POST WOVEN WIRE FENCE (MIN, 14 1/2 GAUGE W/ MAX, 6' MESH SPACING) WITH FILTER CLOTH 20'MIN,. FLOW M " UNDISTURBED GROUND COMPACTED S❑IL - EMBED FILTER CLOTH 16"MIN, A MIN, OF 6' IN GROUND. 4' SELliQ CONSTRUCTION SPECIFICATI❑NS 1, WOVEN WIRE FENCE TO BE FASTENED SECURELY TO FENCE POSTS WITH WIRE TIES OR STAPLES, POSTS SHALL BE STEEL EITHER 'T' OR 'U' TYPE OR HARDWOOD, 2, FILTER CLOTH TO BE TO BE FASTENED SECURELY TO WOVEN WIRE FENCE WITH TIES SPACED EVERY 24' AT TOP AND MID SECTI❑N, FENCE SHALL BE WOVEN WIRE, 6' MAXIMUM MESH ❑PENING. 3, WHEN TWO SECTI❑NS OF FILTER CLOTH ADJ❑IN EACH OTHER THEY SHALL BE OVER- LAPPED BY SIX INCHES AND FOLDED, FILTER CLOTH SHALL BE EITHER FILTER X, MIRAFI 100X, STABILINKA T140N, OR APPROVED EQUIVALENT. 4. PREFABRICATED UNITS SHALL BE GE❑FAB, ENVIR❑FENCE, ❑R APPROVED EQUIVALENT, 5, MAINTENANCE SHALL BE PERFORMED AS NEEDED AND MATERIAL REMOVED WHEN 'BULGES" DEVELOP IN THE SILT FENCE, ADAPTED FROM DETAILS PR❑VIDED BY, USDA - NRCS, NEW Y❑RK STATE DEPARTMENT OF TRANSPORTATION, SILT FENCE NEW Y❑RK STATE DEPARTMENT OF ENVIRONMENTAL CONSERVATI❑N, NEW Y❑RK STATE S❑IL & WATER CONSERVATION COMMITTEE